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1
Gibson, Tom. "Electrical Grid Resilience." Mechanical Engineering 142, no. 06 (June 1, 2020): 40–45. http://dx.doi.org/10.1115/1.2020-jun2.
Анотація:
Abstract For decades, reliability has been the watchword for electric utilities, but now there’s a focus on a related concept: Resilience. It has gained notice as planners began thinking about increased natural disasters brought on by climate change, man-made interference due to malicious cyberattacks, and the instability brought about by adding large quantities of renewable energy. Resilience has become a legitimate field of study involving industry, academia, and government labs, complete with experts in the field. This article delves deeper into the need to achieve electrical grid resiliency as intensity of natural disaster amplifies.
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Sanduleac, Mihai, Alexandru Sandulescu, Cristina Efremov, Constantin Ionescu, Ioan Catalin Damian, and Alexandru Mandis. "Aspects of Design in Low Voltage Resilient Grids—Focus on Battery Sizing and U Level Control with P Regulation in Microgrids of Energy Communities." Energies 16, no. 4 (February 15, 2023): 1932. http://dx.doi.org/10.3390/en16041932.
Анотація:
Energy communities and their resiliency are both relatively new subjects of interest that need deeper analysis. The concepts are emerging in the current trend of energy decarbonization, combined with unpredictable external factors, such as extreme weather, or nearby conflicts, such as wars. To be resilient against electrical network supply outages or heavy blackouts, energy communities need appropriate design of their electrical microgrids to maintain an acceptable level of activity in both normal and critical situations. The paper deals with aspects of the design of the electrical network used by energy communities, seen as microgrids designed to offer an acceptable level of safe operation and energy resilience. While electrical network resilience covers both the public network (main grid) and local microgrid of an energy community, the paper focuses on the safe operation and resilience related to the local microgrid as a distinct goal from the one of preserving the main grid’s functionality. The first section considers definitions of energy resilience and some of the existing preoccupations on the subject. A second section of the paper presents different aspects of the design of a microgrid, with the purpose of increasing its safety in operation and energy community resilience. The section addresses electrical network architectures, multiple roles of storage resources related to prosumers and to islanded microgrids with high-RES penetration, and other aspects such as the impact of electrification of heating through, e.g., heat pumps. The next sections present selected use cases, which develop some of these design aspects by using typical real data for the analysis and assessing solutions to address resilient microgrid challenges. The selected use cases consider simplified approaches for real-time and short-term storage needs and operational use in microgrids, maintaining voltage levels in a high-RES scenario by using battery P control, and optimization of storage resources to cope with the needs. Conclusions are given in a final section, which also presents future work for a presumed continuation with other use cases related to storage means, safe operation, and resilient design of energy communities microgrids.
3
Oktapia S, Anggi, and Arthur Huwae. "Description of Resilience in Adolescents with HIV/AIDS." Majalah Kesehatan Indonesia 4, no. 1 (April 10, 2023): 1–10. http://dx.doi.org/10.47679/makein.2023119.
Анотація:
The stigmatization of PLWHA persists, causing it difficult for PLWHA to participate in social activities. Due to prejudice, intimidation, and neglect, self-exploration is inhibited for HIV-positive individuals, particularly adolescents. As PLWHA, adolescents must be able to learn and develop their resilience to survive in challenging conditions and times. Therefore, this study aims to determine the resilience profile of adolescents affected with HIV/AIDS in Salatiga City. The methodology employed is qualitative and phenomenologically descriptive. The participants were two adolescents in their late 20s who were infected with the HIV/AIDS virus and resided in Salatiga City. Interviews, observations, and data triangulation were used to collect information. The results indicated that the resilience of PLWHA adolescents was correlated with their capacity to respond to problems healthily and effectively. The resilience-building processes of the two PLWHA adolescents share similarities. This was evident from the two PLWHA adolescents' emotional regulation, impulse control, optimism, problem-solving skills, empathy, self-efficacy, and accomplishment. In addition to elements, the two PLWHA adolescents experienced a variety of characteristics that affect resilience, including spirituality, self-esteem, and social support. Despite specific disparities in creating resilience, it is evident that the two adolescents living with HIV are already resilient since they can adjust to their conditions as PLWHA and continue to live productive lives as late adolescents. Abstrak: Stigmatisasi pada ODHA masih terus terjadi, sehingga sering kali individu ODHA merasa sulit untuk hidup di tengah kehidupan sosial. Individu ODHA khususnya remaja juga mengalami problematika mental yang sengat berat ketika ada dalam lingkungan sosial, sehingga eksplorasi diri menjadi terhambat karena adanya dikriminasi, intimidasi, dan pengabaian. Sebagai ODHA, individu remaja harus bisa belajar dan membentuk sarana diri berupa kemampuan resilien, agar dapat bertahan di situasi dan masa-masa sulit. Maka dari itu, penelitian ini bertujuan untuk mengetahui dan mengidentifikasi secara mendalam mengenai gambaran resiliensi pada remaja yang terjangkit virus HIV/AIDS di Kota Salatiga. Pendekatan yang digunakan adalah kualitatif dengan desain deskriptif fenomenologi. Partisipan yang terlibat sebanyak 2 remaja akhir usia 20 tahun yang terjangkit virus HIV/AIDS dan tinggal di Kota Salatiga, dengan menggunakan teknik purposive sampling. Pengumpulan data melalui wawancara, observasi, dan triangulasi data. Hasil penelitian menunjukkan bahwa resiliensi remaja ODHA berhubungan dengan bagaimana mereka dapat merespon setiap permasalahan secara sehat dan produktif. Kedua remaja ODHA memiliki kemiripan dalam proses pembentukan resiliensi. Hal ini tampak dari bagaimana kedua remaja ODHA dapat memenuhi aspek regulasi emosi, pengendalian impuls, optimisme, kemampuan menganalisis masalah, empati, efikasi diri, dan pencapaian. Selain aspek, kedua remaja ODHA juga mengalami berbagai faktor yang membentuk resiliensi, yaitu spiritualitas, harga diri, dan dukungan sosial. Meskipun terdapat beberapa perbedaan dalam proses pembentukan resiliensi, secara keseluruhan dapat dilihat bahwa kedua remaja ODHA sudah resilien karena dapat beradaptasi dengan kondisi mereka sebagai ODHA serta tetap produktif menjalani hidup mereka sebagai individu remaja akhir.
4
Rosales-Asensio, Enrique, José-Luis Elejalde, Antonio Pulido-Alonso, and Antonio Colmenar-Santos. "Resilience Framework, Methods, and Metrics for the Prioritization of Critical Electrical Grid Customers." Electronics 11, no. 14 (July 18, 2022): 2246. http://dx.doi.org/10.3390/electronics11142246.
Анотація:
One of the main objectives of new operating regimes, such as transactional power systems, is to make the power grid more resilient to catastrophes and disturbances, while at the same time making it possible to supply electricity to the largest number of customers. Although this is true, it is well known among power system operators that not all customers are the same. The consequence of this is that any discussion around the impact of transactional power systems on power system resilience should consider the needs of its critical users (such as control centers, fire stations, and hospitals) over other users. In assessing power system resilience, a metric is needed that gives “bonus points” to those systems that, under all circumstances, can continue to provide electricity to their critical users. In order to serve as a parameter in the assessment of power grid resilience, the research presented here discusses the proportion of critical loads existing in critical infrastructures. Once the critical loads are characterized, the next step is the inclusion of these loads in resilience metrics. This paper proposes resiliency metrics in which certain customers (those categorized as critical) are assigned a higher weight than others. One thing to keep in mind is the fact that there is no one-size-fits-all approach for all power systems, and that the assignment of such weights to customers can vary significantly from one operator to another based on their unique systems and the current and expected states of their critical customers.
5
Khodadadi, Ali, Taher Abedinzadeh, Hasan Alipour, and Jaber Pouladi. "Optimal Operation of Energy Hub Systems under Resiliency Response Options." Journal of Electrical and Computer Engineering 2023 (January 10, 2023): 1–13. http://dx.doi.org/10.1155/2023/2590362.
Анотація:
The economic and resilient operation of power systems has always been one of the main priorities of energy systems. In spite of improvements in various fields of energy systems, especially power systems, the issue of resilience has become more important. For this purpose, this paper proposes a multiobjective optimization model to improve the economic performance of energy hub systems and improve the resilience of electrical consumers. Also, consumer welfare, which is a function of the energy not supplied index, is maximized over a 24-hour period by considering extreme weather conditions. The ε-constraint method is applied to solve the proposed model by transforming the multiobjective optimization problem into several single-objective optimization problems. The max-min fuzzy method is also used to select the optimal solution among the Pareto solutions. A sample hub system is made up of electrical, thermal, and gas loads, electrical and thermal energy sources, and storage systems employed as a test system. A group of actions is applied to improve the resilience of the system, which may be affected by outages caused by storms under the resilience response program (RRP). The results proved the efficiency of the proposed RRP in improving economics and resilience.
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Faraji, Jamal, Masoud Babaei, Navid Bayati, and Maryam A.Hejazi. "A Comparative Study between Traditional Backup Generator Systems and Renewable Energy Based Microgrids for Power Resilience Enhancement of a Local Clinic." Electronics 8, no. 12 (December 5, 2019): 1485. http://dx.doi.org/10.3390/electronics8121485.
Анотація:
Extreme weather events lead to electrical network failures, damages, and long-lasting blackouts. Therefore, enhancement of the resiliency of electrical systems during emergency situations is essential. By using the concept of standby redundancy, this paper proposes two different energy systems for increasing load resiliency during a random blackout. The main contribution of this paper is the techno-economic and environmental comparison of two different resilient energy systems. The first energy system utilizes a typical traditional generator (TG) as a standby component for providing electricity during the blackouts and the second energy system is a grid-connected microgrid consisting of photovoltaic (PV) and battery energy storage (BES) as a standby component. Sensitivity analyses are conducted to investigate the survivability of both energy systems during the blackouts. The objective function minimizes total net present cost (NPC) and cost of energy (COE) by considering the defined constraints of the system for increasing the resiliency. Simulations are performed by HOMER, and results show that for having almost the same resilience enhancement in both systems, the second system, which is a grid-connected microgrid, indicates lower NPC and COE compared to the first system. More comparison details are shown in this paper to highlight the effectiveness and weakness of each resilient energy system.
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Cicilio, Phylicia, David Glennon, Adam Mate, Arthur Barnes, Vishvas Chalishazar, Eduardo Cotilla-Sanchez, Bjorn Vaagensmith, et al. "Resilience in an Evolving Electrical Grid." Energies 14, no. 3 (January 29, 2021): 694. http://dx.doi.org/10.3390/en14030694.
Анотація:
Fundamental shifts in the structure and generation profile of electrical grids are occurring amidst increased demand for resilience. These two simultaneous trends create the need for new planning and operational practices for modern grids that account for the compounding uncertainties inherent in both resilience assessment and increasing contribution of variable inverter-based renewable energy sources. This work reviews the research work addressing the changing generation profile, state-of-the-art practices to address resilience, and research works at the intersection of these two topics in regards to electrical grids. The contribution of this work is to highlight the ongoing research in power system resilience and integration of variable inverter-based renewable energy sources in electrical grids, and to identify areas of current and further study at this intersection. Areas of research identified at this intersection include cyber-physical analysis of solar, wind, and distributed energy resources, microgrids, network evolution and observability, substation automation and self-healing, and probabilistic planning and operation methods.
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Cicilio, P., L. Swartz, B. Vaagensmith, C. Rieger, J. Gentle, T. McJunkin, and E. Cotilla-Sanchez. "Electrical grid resilience framework with uncertainty." Electric Power Systems Research 189 (December 2020): 106801. http://dx.doi.org/10.1016/j.epsr.2020.106801.
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Hidayati, Diajeng Laily, and Maulita Noor Aisha. "Living with Hope: Resilience Among Parent/s of Children with Autism in Palembang Therapy Center." INKLUSI 9, no. 1 (August 5, 2022): 81–98. http://dx.doi.org/10.14421/ijds.090105.
Анотація:
In the developing countries, social services for people with disability (PwD) are still limited and responsibility for the development of chil- dren with disability is often associated with their parent/s. The children with special needs, including those with autism, impacts all members of his/her family and leads to the emergence of crisis experiences in the family. The article talks the resiliency of parent/s with autistic chil- dren in Palembang Terapi Center. This paper is written with a phenom- enological approach. Findings show that dominant themes emerged regarding resiliency in this paper setting are self-acceptance, self-ef- ficacy, and adaptation. Several factors that influence the resilience of parents with autistic children are individual abilities, children’s con- ditions, environment, and religious values. Moreover, there are three types of resiliencies according to the level of difficulty experienced by parent/s; high level of difficulty, moderate level of difficulty, and lower level of difficulty. Di negara berkembang, keterbatasan layanan sosial bagi penyandang disabilitas dan tanggung jawab atas tumbuh kembang anak penyandang disabilitas seringkali dikaitkan dengan orang tua. Keberadaan anak berkebutuhan khusus, termasuk anak dengan autisme berdampak pada seluruh anggota keluarga dan berujung pada kemuncul pengalaman krisis keluarga. Artikel ini mengeksplorasi resiliensi orang tua yang memiliki anak dengan autisme di Pusat Terapi Palembang. Artikel ini ditulis dengan pendekatan fenomenologis. Temuan menunjukkan tema terkait resiliensi dalam penerimaan diri, efikasi diri, dan adaptasi. Temuan lain adalah faktor yang mempengaruhi resiliensi orang tua yang memiliki anak autisme dengan kemampuan individu, kondisi anak, lingkungan, dan nilai agama. Selain itu, ada tiga jenis resiliensi menurut tingkat kesulitan yang dialami orang tua; tingkat kesulitan tinggi, sedang, dan rendah.
10
Neumann, Konstantin, Tim van Erp, Erik Steinhöfel, Felix Sieckmann, and Holger Kohl. "Patterns for Resilient Value Creation: Perspective of the German Electrical Industry during the COVID-19 Pandemic." Sustainability 13, no. 11 (May 28, 2021): 6090. http://dx.doi.org/10.3390/su13116090.
Анотація:
The COVID-19 pandemic represents a massive, often unanticipated, external disruption for many companies. As a concept for responding to such disruption, organizational resilience has recently received great attention. In the organizational context, the overriding question is how companies can become more resilient. This study aims to contribute to answering this question by identifying, categorizing, and providing specific business model patterns for achieving resilience on the corporate level. For this purpose, a review of publications by major consulting firms was conducted. Patterns were extracted from publications until a convergence criterion indicated that no new pattern could be identified considering further publications. The 110 extracted unique patterns were clustered into 13 objectives, and additionally categorized according to resilience phases, as well as business model elements, to support the application in practice. The final catalog of patterns was validated through expert interviews and thus provides organizations, such as those in the electrical industry, with an overview and specific approaches on how to tackle industrial resilience through the adaption of their business model.
11
Mar, Adriana, Pedro Pereira, and João F. Martins. "A Survey on Power Grid Faults and Their Origins: A Contribution to Improving Power Grid Resilience." Energies 12, no. 24 (December 9, 2019): 4667. http://dx.doi.org/10.3390/en12244667.
Анотація:
One of the most critical infrastructures in the world is electrical power grids (EPGs). New threats affecting EPGs, and their different consequences, are analyzed in this survey along with different approaches that can be taken to prevent or minimize those consequences, thus improving EPG resilience. The necessity for electrical power systems to become resilient to such events is becoming compelling; indeed, it is important to understand the origins and consequences of faults. This survey provides an analysis of different types of faults and their respective causes, showing which ones are more reported in the literature. As a result of the analysis performed, it was possible to identify four clusters concerning mitigation approaches, as well as to correlate them with the four different states of the electrical power system resilience curve.
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Rodriguez, Rusber, German Alfonso Osma Pinto, Javier Enrique Solano Martínez, Robin Roche Robin Roche, and Daniel Hissel. "A Framework for the Resilience of LV Electrical Networks with Photovoltaic Power Injection." Tecnura 25, no. 70 (October 1, 2021): 71–89. http://dx.doi.org/10.14483/22487638.18629.
Анотація:
Context: Electrical distribution networks have undergone several changes in the last decade. Some changes include incorporating distributed energy sources, such as solar photovoltaic (PV) generation systems. It could modify the performance of the electrical network and leads to new challenges such as evaluating the impacts of the PV integration, the response to electrical and climatic disturbances, and the planning and restructuring of networks. Electrical network behavior versus PV integration could be evaluated by quantifying the variation in operation and including network resilience.
Objective: Propose a reference framework to evaluate the resilience of LV electrical networks with PV power injection.
Methodology: This paper addresses the framework for evaluating the performance of a low voltage (LV) electrical network in the face of the integration of PVs. It collects research related to evaluating the resilience of electrical networks on severe climate changes, natural disasters, and typical maneuvers. Then, it proposes a guideline to evaluate the performance of LV electrical networks with the integration of PV generation sources and includes resilience. For this, the determination of resilience evaluation indices is proposed. The indices are obtained from a normalized transformation of the measurable electrical parameters of the networks. The parameters are those that present the most affected by PV integration or are significant in the performance of the networks. Finally, it presents the evaluation of a proposed resilience index for a university building LV network as a case study.
Results: The resilience assessment proposal is applied to a case study. When evaluating the resilience of the voltage at the common coupling point of the PV, an index of 0.84 is obtained, equivalent to 59.8 hours of overvoltage.
Conclusions: It is possible to improve the resilience of the BT network through management strategies. In the case study, a 29% reduction in overvoltage hours was obtained by applying a curtailment strategy to the PV system.
Financing: ECOS-Nord, Minciencias and Universidad Industrial de Santander.
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Chee Yin, H’ng, Moustafa Moufid Kassem, and Fadzli Mohamed Nazri. "Comprehensive Review of Community Seismic Resilience: Concept, Frameworks, and Case Studies." Advances in Civil Engineering 2022 (April 11, 2022): 1–19. http://dx.doi.org/10.1155/2022/7668214.
Анотація:
Seismic resilience is a concept to evaluate the postearthquake functionality of structures that significantly play a critical role in postearthquake rescue and recovery. Indeed, the community is made up of more than just buildings; it is also made up of other subsystems such as hospital and school facilities as well as roads, drainage systems, sewer systems, and electrical power transmission networks. In recent years, the concept of community resilience as a tool for disaster risk management has attracted substantial attention from all parties, such as governments, designers, decision-makers, and stakeholders. Community resilience can be assessed more effectively by using a multi-disciplinary approach that takes into account the community’s uncertainties, as opposed to a single-criteria approach. The global community resilience model must be long-term validated and dependent on the most vulnerable and low-resilience portions of the community, according to a prior study. According to the review of the seismic resiliency studies performed in the recent decades, the frameworks for the quantification assessment of the community resilience are explained. Moreover, several case studies for community resilience and the application of different subsystems are reviewed and elaborated in this paper. Based on these resilience studies, the main challenges on the effectiveness of the resilience assessment are the availability and accessibility of the data, the financial resources, and the cooperation from all the parties.
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Tofani, Alberto, Gregorio D'Agostino, Antonio Di Pietro, Sonia Giovinazzi, Maurizio Pollino, Vittorio Rosato, and Silvio Alessandroni. "Operational Resilience Metrics for Complex Inter-Dependent Electrical Networks." Applied Sciences 11, no. 13 (June 23, 2021): 5842. http://dx.doi.org/10.3390/app11135842.
Анотація:
The electrical distribution network (EDN) is a critical infrastructure that plays a primary role in a person’s life. Its resilience is a primary property to be achieved in order to withstand all types of perturbations affecting their functions, thus guaranteeing service continuity in adverse conditions. Resilience arises from a combination of a number of properties and actions related to both intrinsic system technologies and management skills. This work proposes a model enabling the estimation of the EDN operational resilience. The proposed model accounts for most of the parameters influencing the resilience of the network, such as network topology, technological properties of its active elements, the SCADA systems, automation procedures and management efficiency. Results confirm that the model can appropriately handle a real network with a large dimension and provide valuable insights to electrical operators.
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Ghosh, Puspendu, and Mala De. "Probabilistic Quantification of Distribution System Resilience for an Extreme Event." International Transactions on Electrical Energy Systems 2022 (June 1, 2022): 1–13. http://dx.doi.org/10.1155/2022/3838695.
Анотація:
The occurrence of natural disasters such as cyclones, earthquakes, and floods has increased worldwide, and their effect is most intense in localized regions. These events expose weaknesses in the power system infrastructures and show how well-prepared the system is to operate its services in a resilient way. During and after an extreme event, the outage and service disruption happens due to the inability of the affected part of the grid to cope with disruptions, which leads to insufficient resilience of the system. It is becoming more critical to enhance the resilience of electrical networks to extreme weather occurrences through suitable hardening processes and smart operational techniques. A reliable prevention approach necessitates a quantitative resilience metric that can estimate the effects of the future extreme events on distribution systems and assess the possible benefits of various planning strategies. This study aims to address the issue of lack of resilience metrics and proposes probabilistic metrics for evaluating the performance of distribution systems resilience in case of extreme weather events. Specifically, this study introduces active and passive resilience concepts to provide insights into system response. The proposed resilience metrics for various weather scenarios are quantified for the IEEE 33-bus system. The simulation framework also analyzes the effects of different operational and structural resilience improvement approaches on the proposed resilience metrics.
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Grigoriev, N. D. "PERSEVERANCE CREATES RESILIENCE." World of Transport and Transportation 16, no. 5 (October 28, 2018): 262–69. http://dx.doi.org/10.30932/1992-3252-2018-16-5-22.
Анотація:
For the English full text of the article please see the attached PDF-File (English version follows Russian version).ABSTRACT The article is dedicated to the 125th anniversary of the birth of Vasily Nikitin, the successor to the Russian inventors of electric arc welding. He became the founder of the theory of electric machines and apparatus for electric arc welding and contributed to creation of electric welding engineering and introduction of electric arc welding in railway transport and in the national economy. Keywords: history, electrical engineering, electric welding, Vasily Nikitin, Benardos, Slavyanov, theory of electric welding machines, Gosplan, electrothermia, railway, shipbuilding, electric motors.
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Afgan, Naim, and Dejan Cvetinovic. "Wind power plant resilience." Thermal Science 14, no. 2 (2010): 533–40. http://dx.doi.org/10.2298/tsci1002533a.
Анотація:
A wind energy system transforms the kinetic energy of wind into mechanical or electrical energy that can be harnessed for practical use. Mechanical energy is most commonly used for pumping water in rural or remote locations. Electrical energy is obtained by connecting wind turbine with the electricity generator. The performance of the wind power plant depends on the wind kinetic energy. It depends on the number of design parameter of the wind turbine. For the wind power plant the wind kinetic energy conversion depends on the average wind velocity, mechanical energy conversion into electricity, and electricity transmission. Resilience of the wind power plant is the capacity of the system to withstand changes of the following parameters: wind velocity, mechanical energy conversion into electricity, electricity transmission efficiency and electricity cost. Resilience index comprise following indicators: change in wind velocity, change in mechanical energy conversion efficiency, change in conversion factor, change in transmission efficiency, and change in electricity cost. The demonstration of the resilience index monitoring is presented by using following indicators, namely: average wind velocity, power production, efficiency of electricity production, and power-frequency change. In evaluation of the resilience index of wind power plants special attention is devoted to the determination of the resilience index for situation with priority given to individual indicators.
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Guarisco, Davide. "Resilience of tunneling magnetoresistive heads against electrical overstress." Journal of Applied Physics 103, no. 7 (April 2008): 07F535. http://dx.doi.org/10.1063/1.2838018.
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Sabouhi, Hamed, Aref Doroudi, Mahmud Fotuhi-Firuzabad, and Mahdi Bashiri. "Electrical Power System Resilience Assessment: A Comprehensive Approach." IEEE Systems Journal 14, no. 2 (June 2020): 2643–52. http://dx.doi.org/10.1109/jsyst.2019.2934421.
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Dwivedi, Divyanshi, K. Victor Sam Moses Babu, Pradeep Kumar Yemula, Pratyush Chakraborty, and Mayukha Pal. "Evaluation of operational resilience in electrical distribution systems." Electric Power Systems Research 234 (September 2024): 110537. http://dx.doi.org/10.1016/j.epsr.2024.110537.
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Hartungi, Rusdy, and L. J. Commis. "Contribution on Improving Power Resilience in the Healthcare Facility." International Journal of Smart Grid and Sustainable Energy Technologies 1, no. 2 (December 18, 2019): 61–66. http://dx.doi.org/10.36040/ijsgset.v1i2.214.
Анотація:
Focused on predicting and preventing electrical failures, this paper presents methodologies to those responsible for managing the electrical supplies in Healthcare and other similar environments. Particular attention has been directed to developing ways of exploiting the known relationships between thermal and electrical engineering disciplines as a means of monitoring and informing a timely intervention. There are two major studies presented in this paper which contrubute resilience in specific areas of Healtcare Facility. The first study is focusing on thermography, it is enhanced with an application of the finite difference method for modelling thermal performance under adverse conditions has been analysed.Thsi methos could provide a more robust solution for appraising new and existing installations. Study shows that early identification. A second study was carried out to examine the use of weather forecast-based electrical site load predictions as a possible precursor to automated load shed control which found reliable correlation between a site’s peak electrical load and the peak outside air temperature. The use of weather forecast-based electrical site load will help reducing unnecessary tripping of the power supply and this increase resilience.
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Palau-Mayo, Anna, Mikel de Prada, and José Luís Domínguez-García. "Towards more resilient electrical networks in urban areas." E3S Web of Conferences 61 (2018): 00015. http://dx.doi.org/10.1051/e3sconf/20186100015.
Анотація:
The requirement of system decarbonisation fixed by the EU 2050 plan is leading to an increased establishment of renewable energy sources. Additionally, the emergence of power electronics and ICT technologies has played a decisive role towards a novel distribution electric grid allowing new monitoring, operation and control. In parallel to the energetic transition, an increasing occurrence of extreme weather events and a reinforced concern on climate change leads to the concept of resilience, which is the capacity to adapt and recover from disruptive events in a coordinated procedure. After a fault event, assuming the objective of the system operator is to minimize the load unsupplied, the present study aims at outlining an early research state on the concept of self-healing through the development of a power flow optimization algorithm within a meshed network. Moreover, the effects of integrating Distributed Energy Resources (DER) in order to increase distribution grid resilience as well as to ensure and secure power supply to the system leads to the clusterization of the power system. With controllable technologies, the on-outaged areas are able to disconnect from the main grid, creating islanded microgrids (MGs) which can work autonomously and consequently, increase grid resilience.
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Maliszewski, Paul J., and Charles Perrings. "Factors in the resilience of electrical power distribution infrastructures." Applied Geography 32, no. 2 (March 2012): 668–79. http://dx.doi.org/10.1016/j.apgeog.2011.08.001.
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Malek, Arif Fikri, Hazlie Mokhlis, Nurulafiqah Nadzirah Mansor, Jasrul Jamani Jamian, Li Wang, and Munir Azam Muhammad. "Power Distribution System Outage Management Using Improved Resilience Metrics for Smart Grid Applications." Energies 16, no. 9 (May 8, 2023): 3953. http://dx.doi.org/10.3390/en16093953.
Анотація:
Smart grid systems play a significant role in improving the resilience of distribution systems (DSs). In this paper, two strategies are proposed for implementation of a smart grid application: (a) a network reconfiguration and (b) a network reconfiguration with mobile emergency generator (MEGs) deployment. An improved set of resilience metrics to quantify and enhance the resiliency of distribution systems (DSs) is developed for the proposed optimization. The metrics aim to determine a suitable strategy and the optimal number and capacity of MEGs to restore the disconnected loads through the development of several microgrids. These metrics are then aggregated with the proposed strategy to develop an automated solution provider. The objective is to maximize system resilience considering the priority loads. The proposed resilience metrics are tested on the IEEE 33-Bus radial DSs. The case studies conducted proved the performance of the proposed power outage management strategy and resilience metrics in maximizing system resiliency for smart grids.
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Ali, Majid, Juan C. Vasquez, Josep M. Guerrero, Yajuan Guan, Saeed Golestan, Jorge De La Cruz, Mohsin Ali Koondhar, and Baseem Khan. "A Comparison of Grid-Connected Local Hospital Loads with Typical Backup Systems and Renewable Energy System Based Ad Hoc Microgrids for Enhancing the Resilience of the System." Energies 16, no. 4 (February 15, 2023): 1918. http://dx.doi.org/10.3390/en16041918.
Анотація:
Extreme weather conditions and natural disasters (ND) are the main causes of power outages in the electric grid. It is necessary to strengthen the electrical power system’s resilience during these catastrophic occurrences, and microgrids may be seen as the best way to achieve this goal. In this paper, two different energy system scenarios were proposed for increasing the resiliency of the electric power system during random outages. In the first scenario, a diesel generator (DG) was used to deliver energy to key loads during grid disruptions, in conjunction with a utility electric grid (UEG) and local electric load (ELL). A grid-connected ad hoc microgrid (MG) with a photovoltaic (PV) system, a battery energy storage (BES) system, and local electric loads made up the second scenario. The PV system and the BES system were used to supply the key loads with electricity during the outage. The major aim of this research was to compare the two resilient-based systems from the perspectives of technology, economics, and the environment. Given that it requires greater resilience than the other loads during severe weather, a hospital load on Indonesia’s Lombok Island was chosen as the critical load. The objective function considers the system’s predefined constraints to reduce the overall net present cost (NPC) and the cost of energy in order to maximize the system resilience (COE). The Optimization of Multiple Energy Resources (HOMER) Grid simulated a 3-day outage in August 2021, and the results demonstrated that the resiliency enhancement for both scenarios was nearly identical. The first scenario resulted in fewer CO2 emissions; however, the second scenario delivered lower operating costs and COE. The simulation’s findings showed that system 1 created an annual emission of 216.902 kg/yr while system 2 only produced an emission of 63.292 kg/yr. This study shows that since RES-based MGs don’t burn fossil fuels to generate power, they are more environmentally friendly resources.
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Kabashkin, Igor. "The Resilience of Electrical Support in UAV Swarms in Special Missions." Energies 17, no. 10 (May 18, 2024): 2422. http://dx.doi.org/10.3390/en17102422.
Анотація:
Unmanned aerial vehicle (UAV) swarms serve as a dynamic platform for diverse missions, including communication relays, search and rescue operations, and environmental monitoring. The success of these operations crucially depends on the resilience of their electrical support systems, especially in terms of battery management. This paper examines the reliability of electrical support for UAV swarms engaged in missions that require prioritization into high and low categories. The paper proposes a dynamic resource allocation strategy that permits the flexible reassignment of drones across different-priority tasks, ensuring continuous operation while optimizing resource use. By leveraging the Markov chain theory, an analytical model for the evaluation of the resilience of the battery management system under different operational scenarios was developed. The paper quantitatively assesses the impact of different operational strategies and battery management approaches on the overall system resilience and mission efficacy. This approach aims to ensure uninterrupted service delivery for critical tasks while optimizing the overall utilization of available electrical resources. Through modeling and analytical evaluations, the paper quantifies the impact of various parameters and operating strategies on overall system resilience and mission availability, considering the utilization strategies of batteries and their reliability and maintenance metrics. The developed models and strategies can inform the development of robust battery management protocols, resource allocation algorithms, and mission planning frameworks, ultimately enhancing the operational availability and effectiveness of UAV swarms in critical special missions.
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Voropai, Nikolai, Irina Kolosok, and Elena Korkina. "Resilience Assessment of the State Estimation Software under Cyber Attacks." E3S Web of Conferences 58 (2018): 02013. http://dx.doi.org/10.1051/e3sconf/20185802013.
Анотація:
Taking into account Smart Grid creation, cyber security appears as critical problem. In spite of wide set of technical tools and organisational decisions, which use for protection of electrical objects against cyber attacks, it is impossible to prevent them completely. Therefore, the ability of Smart Grid to resist cyber attacks is important and necessary property. Thus, the cyber resilience is ability of complicate technical-information system to keep operable state under contingencies including cyber attacks. This paper deals with general problem of electric power system resilience and its cyber resilience, determination methods to calculate quantitative measure of Smart Grid resilience. The state estimation software resilience under cyber attacks is discussed.
28
Mazumder, Dipayan, Mithun Datta, Alexander C. Bodoh, and Ashiq A. Sakib. "A Scalable Formal Framework for the Verification and Vulnerability Analysis of Redundancy-Based Error-Resilient Null Convention Logic Asynchronous Circuits." Journal of Low Power Electronics and Applications 14, no. 1 (January 14, 2024): 5. http://dx.doi.org/10.3390/jlpea14010005.
Анотація:
The increasing demand for high-speed, energy-efficient, and miniaturized electronics has led to significant challenges and compromises in the domain of conventional clock-based digital designs, most notably reduced circuit reliability, particularly in mission-critical hardware. At scaled technology nodes, devices are vulnerable to transient or soft errors, such as Single Event Upset (SEU) and Single Event Latch-up (SEL). External radiation, internal electromagnetic interference (EMI), or noise are the primary sources of these errors, which can compromise the circuit functionality. In response to these challenges, the Quasi-Delay-Insensitive (QDI) Null Convention Logic (NCL) asynchronous design paradigm has emerged as a promising alternative, offering advantages such as ultra-low power performance, reduced noise and EMI, and resilience to process, voltage, and temperature variations. Moreover, its unique architecture and insensitivity to timing variations offers a degree of resistance against transient errors; however, it is not entirely resilient. Several resiliency schemes are available to detect and mitigate soft errors in QDI circuits, with approaches based on redundancy proving to be the most effective in ensuring complete resilience across all major QDI implementation paradigms, including NCL, Pre-charge/Weak-charge Half Buffers (PCHB/WCHB), and Sleep Convention Logic (SCL). This research focuses on one such redundancy-based resiliency scheme for QDI NCL circuits, known as the dual-modular redundancy-based NCL (DMR-NCL) architecture, and addresses the absence of formal methods for the verification and analysis of such circuits. A novel methodology has been proposed for formally verifying the correctness of DMR-NCL circuits synthesized from their synchronous counterparts, covering both safety (functional correctness) and liveness (the absence of deadlock). In addition, this research introduces a formal framework for the vulnerability analysis of DMR-NCL circuits against SEU/SEL. To demonstrate the framework’s efficacy and scalability, a prototype computer-aided support tool has been developed, which verifies and analyzes multiple DMR-NCL benchmark circuits of varying sizes and complexities.
29
Willingham, Michael. "Focusing on Regional Resilience." Proceedings of the IEEE 96, no. 5 (May 2008): 755–57. http://dx.doi.org/10.1109/jproc.2008.917713.
30
Gu, Jiting, and Zhibo Liu. "TOPSIS-Based Algorithm for Resilience Indices Construction and the Evaluation of an Electrical Power Transmission Network." Symmetry 14, no. 5 (May 11, 2022): 985. http://dx.doi.org/10.3390/sym14050985.
Анотація:
In the context of energy transformation, new energy technologies are developing rapidly, the penetration rate of new energy is increasing, and the energy structure tends to be low-carbon, which leads to the asymmetry between traditional energy and new energy. At present, the smart power grid can be conceived as a complex cyber-physical system, and its resilience assessment in the face of extreme disasters needs more holistic consideration. Therefore, considering the impact of massive access to new energy on the resilience of the power grid main network, the resilience evaluation index system of the power grid main network under the background of the energy transition is established. It is proposed to use the priority comparison method and CRITIC (Criteria Importance Through Intercriteria Correlation) to determine the subjective weight and subjective and objective weight of the index, respectively, and combine the influence of the two weights to obtain the comprehensive weight. Then, TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) is used to evaluate the regional power grid restoring force. The results of an example show that the proposed method can effectively evaluate the resilience level of the power grid under the background of the energy transition, which has a certain guiding significance for improving the power grid’s resilience under the environment of energy transformation.
31
Ye, Qiang, and Mike MacGregor. "SACK TCP resilience." Canadian Journal of Electrical and Computer Engineering 32, no. 2 (2007): 67–76. http://dx.doi.org/10.1109/cjece.2007.365504.
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Mohamed, Ahmed Ali A., Kirn Zafar, Dhavalkumar Vaidya, Lizzette Salmeron, Ondrea Kanwhen, Yusef Esa, and Mohamed Kamaludeen. "Grid Impact of Wastewater Resource Recovery Facilities-Based Community Microgrids." Smart Cities 6, no. 6 (December 11, 2023): 3427–53. http://dx.doi.org/10.3390/smartcities6060152.
Анотація:
The overarching goal of this paper is to explore innovative ways to adapt existing urban infrastructure to achieve a greener and more resilient city, specifically on synergies between the power grid, the wastewater treatment system, and community development in low-lying coastal areas. This study addresses the technical feasibility, benefits, and barriers of using wastewater resource recovery facilities (WRRFs) as community-scale microgrids. These microgrids will act as central resilience and community development hubs, enabling the adoption of renewable energy and the provision of ongoing services under emergency conditions. Load flow modeling and analysis were carried out using real network data for a case study in New York City (NYC). The results validate the hypothesis that distributed energy resources (DERs) at WRRFs can play a role in improving grid operation and resiliency.
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Colberg, Tim. "STRATEGIC RESILIENCE: A SYSTEMATIC REVIEW OF LEADING LITERATURE." Journal of Business Management 20 (2022): 1–23. http://dx.doi.org/10.32025/jbm22004.
Анотація:
Topicality: The concepts of resilience, organizational resilience, and strategic resilience in management science have been gaining more and more attention in recent years. Strategic resilience, in general, can be understood as the capability to turn threats into opportunities. The overarching concept of organizational resilience describes the capability to respond to changes or adversity; however, the concept of strategic resilience is still underrepresented in research and not clearly distinguished within organizational resilience. The research aim: This paper aims to conduct a systematic literature review to develop a shared understanding of the concept of strategic resilience in business and management research. Furthermore, a future research agenda is provided from these findings. Methodology: The review examines the leading publications with the search term ‘strategic resilience’ in the ScienceDirect and Institute of Electrical and Electronics Engineers (IEEE) databases with a Boolean search. In total, 73 publications across 45 publication sources from 1979 to 2021 are used. Findings: Research on the resilience of companies and systems seems to trend upwards. Publications are concentrated primarily in journals with an environmental or sustainable background. The publications view resilience in terms of the cause of resilience, fields where resilience is applied, or the concept of resilience and strategic management itself. Novelty: Analyzing the existing research shows that strategic resilience can prepare a response to unforeseeable challenges or opportunities in a company by pursuing an ambidextrous organization that exploits operational resilience and explores strategic resilience to build organizational resilience. Keywords: resilience, strategic resilience, organizational resilience, uncertainty, organizational ambidexterity, dynamic capabilities. Paper classification: literature review
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Shojaeiyan, Sattar, Moslem Dehghani, and Pierluigi Siano. "Microgrids Resiliency Enhancement against Natural Catastrophes Based Multiple Cooperation of Water and Energy Hubs." Smart Cities 6, no. 4 (July 15, 2023): 1765–85. http://dx.doi.org/10.3390/smartcities6040082.
Анотація:
With the ever-growing frequency of natural catastrophe occurrences such as hurricanes, floods, earthquakes, etc., the idea of resilient microgrids (MGs) has attracted more attention than before. Providing the opportunity for a multi-carrier energy supply after a natural catastrophe can lessen power losses and improve power resiliency and reliability. Critical loads within the MG can be prioritized and restored in the shortest possible time based on the condition of the network after the damaging occurrence by considering the energy hub (EH) systems and the optimum design and allocation of these multi-carrier systems. To this end, this paper aims to address the resilience framework in MGs considering sets of water and EHs (WEHs) consisting of CHP (combined heat and power), a boiler, energy storage, and a desalination unit. This study focused on considering an effective resilient scheme to restore critical loads in a short period after a natural catastrophe when the MG experiences an unpredictable event. By applying the idea of WEHs, there would be a chance of restoring the system by using two sets of WEH systems in the appropriate islanded points to restore the system and critical loads of electricity, heat, and water. For this purpose, different scenarios were considered for assessing the resiliency of the system against a natural catastrophic event that causes serious damage to the network by analyzing the energy-not-supplied (ENS) factor. Moreover, the allocated WEHs can adequately supply the electrical, water, and thermal demand loads throughout the day after the natural catastrophe. To mitigate the unforeseen variations in the renewable sources, a battery is located in the WEH, which can attend to the optimal scheduling effectively. A scenario-based method is also introduced to improve the resiliency of MGs in an uncertain environment such as electrical, heat, and water stochastic demands. The appropriate efficiency of the offered model was considered on a modified IEEE test system.
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Balducci, Patrick, Kendall Mongird, and Mark Weimar. "Understanding the Value of Energy Storage for Power System Reliability and Resilience Applications." Current Sustainable/Renewable Energy Reports 8, no. 3 (June 25, 2021): 131–37. http://dx.doi.org/10.1007/s40518-021-00183-7.
Анотація:
Abstract Purpose of Review The need for energy storage in the electrical grid has grown in recent years in response to a reduced reliance on fossil fuel baseload power, added intermittent renewable investment, and expanded adoption of distributed energy resources. While the methods and models for valuing storage use cases have advanced significantly in recent years, the value of enhanced resilience remains an open research question. Recent Findings The findings of the recent research indicate that energy storage provides significant value to the grid, with median benefit values for specific use cases ranging from under $10/kW-year for voltage support to roughly $100/kW-year for capacity and frequency regulation services. While the value of lost load is used widely to estimate the benefits of mitigating short-duration outages, reaching as high as $719/kilowatt-year, there is no consensus when it comes to monetizing the value of improving grid resilience. Summary This paper presents a use case taxonomy for energy storage and uses the taxonomy to conduct a meta-analysis of an extensive set of energy storage valuation studies. It reviews several approaches for monetizing reliability and resiliency services and presents a proposed approach for valuing resiliency for energy storage investments.
36
He, Justin J., Douglas L. Van Bossuyt, and Anthony Pollman. "Experimental Validation of Systems Engineering Resilience Models for Islanded Microgrids." Systems 10, no. 6 (December 6, 2022): 245. http://dx.doi.org/10.3390/systems10060245.
Анотація:
Microgrids are used in many applications to power critical loads that have significant consequences if they lose power. Losing power to medical centers, water treatment plants, data centers, national defense installations, airports, and other critical infrastructure can cause loss of money and loss of life. Although such microgrids are generally reliable at providing stable power, their resilience to disruption can be poor. Common interruptions include natural disasters like earthquakes, and man-made causes such as cyber or physical attacks. Previous research into microgrid resilience evaluation efforts centered on theoretical modeling of total electrical microgrid loading, critical electrical load prioritization, assumed capacity of renewable energy sources and their associated energy storage systems, and assumed availability of emergency generators. This research assesses the validity of two microgrid resilience models developed for analyzing islanded microgrids by using experimental data from a scaled microgrid system. A national defense context is provided to motivate the work and align with the intended purpose two microgrid resilience models. The results of this research validate that the simulation models are valid to use in some situations, and highlight some areas for further model improvement.
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Mottahedi, Adel, Farhang Sereshki, Mohammad Ataei, Ali Nouri Qarahasanlou, and Abbas Barabadi. "The Resilience of Critical Infrastructure Systems: A Systematic Literature Review." Energies 14, no. 6 (March 12, 2021): 1571. http://dx.doi.org/10.3390/en14061571.
Анотація:
Risk management is a fundamental approach to improving critical infrastructure systems’ safety against disruptive events. This approach focuses on designing robust critical infrastructure systems (CISs) that could resist disruptive events by minimizing the possible events’ probability and consequences using preventive and protective programs. However, recent disasters like COVID-19 have shown that most CISs cannot stand against all potential disruptions. Recently there is a transition from robust design to resilience design of CISs, increasing the focus on preparedness, response, and recovery. Resilient CISs withstand most of the internal and external shocks, and if they fail, they can bounce back to the operational phase as soon as possible using minimum resources. Moreover, in resilient CISs, early warning enables managers to get timely information about the proximity and development of distributions. An understanding of the concept of resilience, its influential factors, and available evaluation and analyzing tools are required to have effective resilience management. Moreover, it is important to highlight the current gaps. Technological resilience is a new concept associated with some ambiguity around its definition, its terms, and its applications. Hence, using the concept of resilience without understanding these variations may lead to ineffective pre- and post-disruption planning. A well-established systematic literature review can provide a deep understanding regarding the concept of resilience, its limitation, and applications. The aim of this paper is to conduct a systematic literature review to study the current research around technological CISs’ resilience. In the review, 192 primary studies published between 2003 and 2020 are reviewed. Based on the results, the concept of resilience has gradually found its place among researchers since 2003, and the number of related studies has grown significantly. It emerges from the review that a CIS can be considered as resilient if it has (i) the ability to imagine what to expect, (ii) the ability to protect and resist a disruption, (iii) the ability to absorb the adverse effects of disruption, (iv) the ability to adapt to new conditions and changes caused by disruption, and (v) the ability to recover the CIS’s normal performance level after a disruption. It was shown that robustness is the most frequent resilience contributing factor among the reviewed primary studies. Resilience analysis approaches can be classified into four main groups: empirical, simulation, index-based, and qualitative approaches. Simulation approaches, as dominant models, mostly study real case studies, while empirical methods, specifically those that are deterministic, are built based on many assumptions that are difficult to justify in many cases.
38
Mustafa, Albara M., and Abbas Barabadi. "Resilience Assessment of Wind Farms in the Arctic with the Application of Bayesian Networks." Energies 14, no. 15 (July 22, 2021): 4439. http://dx.doi.org/10.3390/en14154439.
Анотація:
Infrastructure systems, such as wind farms, are prone to various human-induced and natural disruptions such as extreme weather conditions. There is growing concern among decision makers about the ability of wind farms to withstand and regain their performance when facing disruptions, in terms of resilience-enhanced strategies. This paper proposes a probabilistic model to calculate the resilience of wind farms facing disruptive weather conditions. In this study, the resilience of wind farms is considered to be a function of their reliability, maintainability, supportability, and organizational resilience. The relationships between these resilience variables can be structured using Bayesian network models. The use of Bayesian networks allows for analyzing different resilience scenarios. Moreover, Bayesian networks can be used to quantify resilience, which is demonstrated in this paper with a case study of a wind farm in Arctic Norway. The results of the case study show that the wind farm is highly resilient under normal operating conditions, and slightly degraded under Arctic operating conditions. Moreover, the case study introduced the calculation of wind farm resilience under Arctic black swan conditions. A black swan scenario is an unknowable unknown scenario that can affect a system with low probability and very high extreme consequences. The results of the analysis show that the resilience of the wind farm is significantly degraded when operating under Arctic black swan conditions. In addition, a backward propagation of the Bayesian network illustrates the percentage of improvement required in each resilience factor in order to attain a certain level of resilience of the wind farm under Arctic black swan conditions.
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OYAMA, Tsutomu, and Junichi NAITO. "Enhancing Nationwide Power Grid Resilience." Journal of The Institute of Electrical Engineers of Japan 142, no. 1 (January 1, 2022): 10–15. http://dx.doi.org/10.1541/ieejjournal.142.10.
40
Hu, Jin-Li, and Tien-Yu Chang. "Energy Resilience: A Cross-Economy Comparison." Energies 16, no. 5 (February 24, 2023): 2214. http://dx.doi.org/10.3390/en16052214.
Анотація:
The goal of this paper is to use the variable returns to scale (VRS)-slacks-based measure (SBM)-data envelopment analysis (DEA) method to compare the energy resilience of different economies and areas. This study looks at the energy resilience scores of 26 economies from Europe, the Americas, and the Asia-Pacific area. It does this by looking at twelve sub-indicators in three dimensions: society, the economy, and the environment. According to the computational results, seventeen of these economies’ total energy resilience achieved top-tier performance. South Korea, ranked 18th, is only second to these seventeen economies and is followed by, among others, Turkey, Luxembourg, Poland, Italy, Belgium, the Slovak Republic, the Czech Republic, and Hungary. Twelve of the twenty European economies, all three American economies, and two Asia-Pacific economies are relatively energy-resilient. There are sixteen economies in society dimensions, seventeen economies in economy dimensions, and seventeen economies in environment dimensions that are relatively energy-resilient. Sub-dimensional improvement suggestions for relatively less energy-resilient economies are provided according to empirical results. The outcome of the research provides policymakers with a benchmark for future policy planning. Due to data limitations, this study cannot benchmark all OECD economies and does not account for sub-dimensional resource inputs.
41
Keynan, Jackob N., Avihay Cohen, Gilan Jackont, Nili Green, Noam Goldway, Alexander Davidov, Yehudit Meir-Hasson, et al. "Electrical fingerprint of the amygdala guides neurofeedback training for stress resilience." Nature Human Behaviour 3, no. 1 (December 10, 2018): 63–73. http://dx.doi.org/10.1038/s41562-018-0484-3.
42
Abantao, Gerald A., Jessa A. Ibañez, Paul Eugene Delfin C. Bundoc, Lean Lorenzo F. Blas, Xaviery N. Penisa, Eugene A. Esparcia, Michael T. Castro, et al. "Reconceptualizing Reliability Indices as Metrics to Quantify Power Distribution System Resilience." Energies 17, no. 8 (April 17, 2024): 1909. http://dx.doi.org/10.3390/en17081909.
Анотація:
In regions heavily affected by recurrent typhoons, the need for more resilient electricity infrastructure is pressing. This emphasizes the importance of integrating resilience assessment, including incorporating resilience metrics, into the planning process of power distribution systems against any disruptive events. Although standardized metrics exist for assessing distribution system reliability, the absence of formalized resilience metrics hampers informed investments in critical infrastructure such as microgrid development. In this work, a set of resilience metrics is proposed by reconceptualizing reliability metrics. The metrics were formulated to account for both the type of extreme event and its specific impact on loads with varying levels of criticality. The effectiveness of the proposed metrics is demonstrated through a Philippine microgrid case study. A Monte Carlo framework incorporating an extreme event model, component fragility model, and system response model was used to quantify the resilience improvement before and after stand-alone microgrid operation of the power distribution system. Results show that the proposed metrics can effectively evaluate resilience enhancement and highlight the value of a holistic approach of considering critical loads and types of extreme events to strengthen societal and community resilience, making a compelling case for strategic investments in infrastructure upgrades such as microgrids.
43
Thomas, A. V., and Biswajit Mahanty. "Interrelationship among resilience, robustness, and bullwhip effect in an inventory and order based production control system." Kybernetes 49, no. 3 (September 5, 2019): 732–52. http://dx.doi.org/10.1108/k-11-2018-0588.
Анотація:
Purpose This study aims to examine the interrelationship between resilience, robustness and bullwhip effect using an inventory- and order-based production control system being subjected to operational disruption in the customer demand process. Design/methodology/approach Control engineering techniques and simulation are employed for the supply chain dynamics study. Findings The results show that resilience and robustness are two conflicting performance characteristics and therefore, a tradeoff can be established between them. It is also observed that improvement in resilience and reduction of bullwhip effect can be achieved simultaneously through a proper selection of control parameters. Originality/value The work establishes a relationship between the resilient behavior of a supply chain and bullwhip effect.
44
Rösch, Dennis, Thomas Bauer, André Kummerow, Marcel Kühne, Steffen Nicolai, and Peter Bretschneider. "Transformation in substation automation: Cyber-Resilient Digital Substations (CyReDS) in power grids." at - Automatisierungstechnik 71, no. 9 (September 1, 2023): 789–801. http://dx.doi.org/10.1515/auto-2023-0075.
Анотація:
Abstract The digitalization of substations leads to a high degree of automation, which is referred to as Digital Substations with the use of the IEC 61850. An increase in cybersecurity is necessary, and technically enabled by detection and incident response systems – security-by-design is currently often secondary. The next transformation step of substations is introduced and outlined in this paper as a cyber-resilient digital substation. Based on a state-of-the-art description, this paper presents a definition of cyber resilience for digital substations as a basis for the introduced cyber resilience monitor. The monitor acts as a central instance for recording, assessing and responding to security threats and incidents. Furthermore, the requirements for the system structure of the cyber-resilient digital substation are shown and underpinned with current research approaches.
45
Jeong, Seong-Ran. "Relationship between Major SatisfactionㆍStressㆍResilience of College Students". K Association of Education Research 9, № 1 (28 лютого 2024): 313–27. http://dx.doi.org/10.48033/jss.9.1.15.
Анотація:
The purpose of this study is to examine the relationship between college students' major satisfaction, stress, and resilience, and to determine whether college students' major satisfaction and stress affect their resilience. For this purpose, major satisfaction, stress, and resilience tests were conducted on 221 students at K University and the results were analyzed. Data analysis included descriptive statistics, frequency analysis, correlation analysis, multiple regression analysis, and reliability analysis using the SPSS program. As a result of the study, college students' major satisfaction and stress showed a negative correlation, and the negative correlation was especially high with academic stress and future problem stress. In terms of stress and resilience of college students, the correlation between positive resilience and stress was particularly high. College students' major satisfaction and resilience were found to be positively correlated, and resilience's interpersonal skills were found to be highly positively correlated with major satisfaction. Factors that affect the resilience of college students are both major satisfaction and stress. It was found that the higher the major satisfaction and the lower the stress, the higher the resilience. The relative influence of major satisfaction and stress showed that major satisfaction had a greater impact on resilience than stress. In future research, qualitative research such as FGI (Focus Group Interview) will be needed in addition to research to improve college students' stress management ability and resilience and quantitative research on major satisfaction, stress, and resilience targeting more diverse groups.
46
Bachmann, Ivana, Patricio Reyes, Javier Bustos, and Alonso Silva. "Multidimensional Network Resilience Analysis." IEEE Latin America Transactions 14, no. 6 (June 2016): 2912–14. http://dx.doi.org/10.1109/tla.2016.7555274.
47
Florkowski, Marek, Hideki Hayashi, Shinji Matsuda, Hirotaka Moribe, Norihiko Moriwaki, Darren Jones, and Jeff Pauska. "Digitally Boosted Resilience: Digitalization to Enhance Resilience of Electric Power System." IEEE Power and Energy Magazine 22, no. 2 (March 2024): 100–109. http://dx.doi.org/10.1109/mpe.2023.3344554.
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Cutler, Robert M., and Alexander von Lingen. "An evolutionary phenomenology of resilience." Kybernetes 48, no. 4 (April 1, 2019): 685–95. http://dx.doi.org/10.1108/k-11-2017-0460.
Анотація:
Purpose The purpose of the paper is to set out an evolutionary schema for organizational resilience using the established emergent autopoiesis coherence (EAC) framework, with empirical reference to the European Parliament’s development of institutional capacities since its foundation in 1952 as the Common Assembly of the European Coal and Steel Community (CA-ECSC). Design/methodology/approach The logic is categorical-synthetic and second-order cybernetic, implicitly underlain by a correspondence theory of truth united with a coherentism based in the epistemology of complex systems. Findings The European Parliament has constructed itself as a resilient organization, but the process has entailed over-learning of past lessons, creating behavioral syndromes of dysfunction in the face of new challenges. Research limitations/implications The work contrasts antifragility with resilience and suggests a new approach to it. Practical implications The analytical framework and conclusions hold value for the practical design of resilient organizations. Social implications The groundwork of the EAC’s conceptual framework is laid, and the basis for applying it to human and other naturally occurring societies is established. Originality/value K.W. Deutsch’s mid-twentieth century work on cybernetic-based learning in political systems is reconstructed, updated and applied to twenty-first century political phenomena. The insights are validated, and the analytical framework’s robustness is demonstrated.
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Rogozinski, Sina, and Somidh Saha. "The Current State of Resilience Research in Urban Forestry: A Qualitative Literature Review." INTERNATIONAL JOURNAL OF PLANT AND ENVIRONMENT 7, no. 01 (April 15, 2021): 11–26. http://dx.doi.org/10.18811/ijpen.v7i01.2.
Анотація:
In the times of enlarging cities and more people living in cities, it is essential to maintain the quality of life for everyone. Urban forests make a significant contribution to this. In urban areas, productive ecosystems are essential to maintain human health and well-being. However, problems like increasing urbanization, changing climate, and pollution in the air, water, and soil can endanger urban ecosystems like urban forests. Having or building resilient urban forests is seen as a possibility to maintain ecosystem services provided by urban forests. Under future conditions, they may become essential for human life in urban areas as some are critical for human health. This study is a literature review of past research dealing with resilience in urban forests. Forty-one articles published in the years 2006 to 2019 that complied with the search criteria were reviewed. Results show that only three articles used a definition of the resilience of urban trees after disturbance based on a formula; two articles used a definition of resilience based on natural ecosystems. The remaining articles did not define resilience while using the term in the articles. Out of the reviewed articles, four major themes were identified: urban forest management, urban biodiversity, urban soil, and socio-economic conditions. Nine articles included content about urban soils, 19 articles about urban forest management, 30 articles about urban biodiversity, and 11 articles about socio-economic conditions. As (built) urban forests in cities differ considerably from natural ecosystems, some authors rated monitoring and management actions as necessary, mainly for new establishments and the integration of new species. Authors expressed contradicting opinions on species richness. While some articles suggested focusing on native or endemic species, others proposed to increase species diversity to enhance urban forest resilience. Tolerances and resistances of tree species are essential for urban areas and may gain importance in the future, increasing extreme weather events leading to more frequent pest and disease outbreaks. Results indicated a focus on urban soil quality as a basis for plant growth, and tree health is an essential factor in urban forestry. Municipal authorities need to adapt management actions to create and maintain an urban forest to the benefits they intend to achieve for the city considering local conditions like climate, species pool, and specific resistances. At the end of the review, a framework recommends actions for a structured collaboration of municipal authorities, researchers, and citizens to achieve resilient urban forests.
50
Martišauskas, Linas, Juozas Augutis, Ričardas Krikštolaitis, Rolandas Urbonas, Inga Šarūnienė, and Vytis Kopustinskas. "A Framework to Assess the Resilience of Energy Systems Based on Quantitative Indicators." Energies 15, no. 11 (May 31, 2022): 4040. http://dx.doi.org/10.3390/en15114040.
Анотація:
The “Clean Energy for all Europeans” package highlights the need to create a resilient critical energy infrastructure in the European Union. Resilience is an emerging term to describe the energy system’s ability to withstand shocks caused by natural hazards, technical accidents, or intentional threats. In this paper, a framework to assess the resilience of energy systems using quantitative indicators is presented. Two main groups of resilience indicators are proposed that depend on what is being measured within the energy system: capacity (attribute-based) indicators or performance in the presence of disruption (performance-based) indicators. This study concentrates on the first resilience phase, when the energy system has to absorb the impact of the shock. The approach considers various disruptions (both internal and external) as triggering events. There is a particular focus on future shocks affecting the prospective energy system, which will have changed with respect to the current one. The future foresight capabilities and potential of the selected resilience indicators are demonstrated using calculations for the Lithuanian energy system. The results revealed that the most important factors that impact energy system resilience are a rich electricity production mix and the diversification of both supply and production in the prospective energy system.