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Artykuły w czasopismach na temat „Modern power system”

Autor: Grafiati

Data publikacji: 6 września 2023

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1

Sharma, Dushyant, i Sukumar Mishra. "Power system frequency stabiliser for modern power systems". IET Generation, Transmission & Distribution 12, nr 9 (15.05.2018): 1961–69. http://dx.doi.org/10.1049/iet-gtd.2017.1295.

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2

Baxter, P. "Modern Power System Analysis". Power Engineering Journal 3, nr 2 (1989): 70. http://dx.doi.org/10.1049/pe:19890011.

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Grover, Andrew. "Modern System Power Management". Queue 1, nr 7 (październik 2003): 66–72. http://dx.doi.org/10.1145/957717.957774.

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Papadopoulos, M., i N. D. Hatziargyriou. "Book Review: Modern Power System Analysis". International Journal of Electrical Engineering & Education 27, nr 1 (styczeń 1990): 36. http://dx.doi.org/10.1177/002072099002700106.

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Bollen, Math. "Book Review: Modern Power System Planning". International Journal of Electrical Engineering & Education 33, nr 3 (lipiec 1996): 279. http://dx.doi.org/10.1177/002072099603300308.

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Alexandridis, Antonio T. "Modern Power System Dynamics, Stability and Control". Energies 13, nr 15 (24.07.2020): 3814. http://dx.doi.org/10.3390/en13153814.

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This Special Issue of Energies, “Modern Power System Dynamics, Stability and Control”, addresses the core problem of deploying novel aspects in the analysis of modern power systems as these are composed after the high penetration of distributed generation (DG) with different renewable energy sources (RES). The focus is given either on the new whole power and control system configuration or on individual cases of DG sources, power converters and other general or specific plants and devices. The problem can be tackled with different methodologies and may have several, more or less valuable and complicated solutions. The twenty-three accepted papers certainly offer a good contribution in a wide range of applications; they are extended from basic system theory perspectives, fundamental nonlinear analysis tools and novel modeling deployments to some interesting particular system and control issues.

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7

Basit, Abdul, Tanvir Ahmad, Asfand Yar Ali, Kaleem Ullah, Gussan Mufti i Anca Daniela Hansen. "Flexible Modern Power System: Real-Time Power Balancing through Load and Wind Power". Energies 12, nr 9 (6.05.2019): 1710. http://dx.doi.org/10.3390/en12091710.

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Increasing large-scale integration of renewables in conventional power system has led to an increase in reserve power requirement owing to the forecasting error. Innovative operating strategies are required for maintaining balance between load and generation in real time, while keeping the reserve power requirement at its minimum. This research work proposes a control strategy for active power balance control without compromising power system security, emphasizing the integration of wind power and flexible load in automatic generation control. Simulations were performed in DIgSILENT for forecasting the modern Danish power system with bulk wind power integration. A high wind day of year 2020 was selected for analysis when wind power plants were contributing 76.7% of the total electricity production. Conventional power plants and power exchange with interconnected power systems utilize an hour-ahead power regulation schedule, while real-time series are used for wind power plants and load demand. Analysis showed that flexible load units along with wind power plants can actively help in reducing real-time power imbalances introduced due to large-scale integration of wind power, thus increasing power system reliability without enhancing the reserve power requirement from conventional power plants.

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8

Baczyńska, Aleksandra, i Waldemar Niewiadomski. "Power Flow Tracing for Active Congestion Management in Modern Power Systems". Energies 13, nr 18 (17.09.2020): 4860. http://dx.doi.org/10.3390/en13184860.

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Future power systems will be based on the more active role of distribution system and its cooperation with transmission system. The main issue, which will appear in the network, is the congestion. Congestion management will become one of the crucial elements of power system operation since Distributed Energy Resources (DERs) will be playing a more important role in power systems. Moreover, the evolution also changed the character of the systems to be more dynamic—the need for precise description of power flow and shares of particular nodes in line flows will emerge. This paper presents the potential solution to the congestion management problem by using the active role of the distribution system, which may dismantle the congestions by offering flexibility services. The tools which will be indispensable in this process will be Power Flow Tracing (PFT) methods. The main goal of this paper is to present modification of PFT method and its possible applications. The correctness of the Modified Inage Domain (MID) method is verified. The identification, verification and possible applications of the new MID method are also shown in the paper. It has been proven that the new method may be used in applications of allocation of transmission cost and in application in modern power systems for advanced congestion management.

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9

HAYASHI, TOSHIYUKI. "Modern Technologies Utilized in Electric Power System. 6. Power System Technologies in Future." Journal of the Institute of Electrical Engineers of Japan 116, nr 10 (1996): 669–71. http://dx.doi.org/10.1541/ieejjournal.116.669.

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Peyghami, Saeed, Pooya Davari, Mahmud Fotuhi-Firuzabad i Frede Blaabjerg. "Standard Test Systems for Modern Power System Analysis: An Overview". IEEE Industrial Electronics Magazine 13, nr 4 (grudzień 2019): 86–105. http://dx.doi.org/10.1109/mie.2019.2942376.

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Lutz, E., i J. Martinaud. "A Modern Data Base Management System in Power System Control". IFAC Proceedings Volumes 18, nr 7 (lipiec 1985): 293–98. http://dx.doi.org/10.1016/s1474-6670(17)60448-8.

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Lugones, María. "Heterosexualism and the Colonial/Modern Gender System". Hypatia 22, nr 1 (2007): 186–219. http://dx.doi.org/10.1111/j.1527-2001.2007.tb01156.x.

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The coloniality of power is understood by Anibal Quijano as at the constituting crux of the global capitalist system of power. What is characteristic of global, Eurocentered, capitalist power is that it is organized around two axes that Quijano terms “the coloniality of power” and “modernity.” The coloniality of power introduces the basic and universal social classification of the population of the planet in terms of the idea of race, a replacing of relations of superiority and inferiority established through domination with naturalized understandings of inferiority and superiority. In this essay, Lugones introduces a systemic understanding of gender constituted by colonial/modernity in terms of multiple relations of power. This gender system has a light and a dark side that depict relations, and beings in relation as deeply different and thus as calling for very different patterns of violent abuse. Lugones argues that gender itself is a colonial introduction, a violent introduction consistently and contemporarily used to destroy peoples, cosmologies, and communities as the building ground of the “civilized” West.

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13

Shah, Syed Afzal. "Active Power Control In Modern Power System Through Demand Side Response". International Journal of Engineering Works 06, nr 12 (31.12.2019): 521–24. http://dx.doi.org/10.34259/ijew.19.612521524.

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14

Hu, Zhen, Ding Wang i Yangwu Shen. "Reactive power compensation method in modern power system facing energy conversion". IET Generation, Transmission & Distribution 16, nr 8 (25.01.2022): 1582–91. http://dx.doi.org/10.1049/gtd2.12374.

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15

Lee, Wei-Jen. "Transformation of the Modern Power System [President's Messsage]". IEEE Industry Applications Magazine 27, nr 5 (wrzesień 2021): 5–6. http://dx.doi.org/10.1109/mias.2021.3086957.

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16

Jee, Warren W. "Modern High-Power TBM with Advanced Procurement System". Journal of Korean Society For Rock Mechanics 23, nr 3 (30.06.2013): 161–68. http://dx.doi.org/10.7474/tus.2013.23.3.161.

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17

Fateev, Sergei Anatol'evich. "Modern power sources for cardioelectronics". Electrochemical Energetics 11, nr 4 (2011): 223–28. http://dx.doi.org/10.18500/1608-4039-2011-11-4-223-228.

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Cell with electrochemical system «lithium – fluorinated carbon» intended for electrical pacemakers have been developed. Their significant advantages over traditional lithium – iodine cells for pacemakers are shown. Discharges characteristics, a shelf-life, and reliability, as well as an effect of various additives in fluorinated carbon cathode on discharge characteristics have been studied.

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18

Golovanov, Igor', Alena Alekseeva, Vladimir Proskuryakov i Roman Samchuk. "MODERN METHODS OF REACTIVE POWER COMPENSATION IN PETROCHEMICAL PRODUCTION". Bulletin of the Angarsk State Technical University 1, nr 15 (12.01.2022): 22–28. http://dx.doi.org/10.36629/2686-777x-2021-1-15-22-28.

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Electrical circuits of reactive power compensation on the basis of thyristor control circuits in the power supply system of oil refineries are considered. The main advantages, advantages over traditional reactive power compensation systems and directions of introduction into the power supply system of modern production are formulated.

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19

Peyghami, Saeed, Peter Palensky, Mahmoud Fotuhi-Firuzabad i Frede Blaabjerg. "System-Level Design for Reliability and Maintenance Scheduling in Modern Power Electronic-Based Power Systems". IEEE Open Access Journal of Power and Energy 7 (2020): 414–29. http://dx.doi.org/10.1109/oajpe.2020.3029229.

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20

Jacome, Veronica, Noah Klugman, Catherine Wolfram, Belinda Grunfeld, Duncan Callaway i Isha Ray. "Power quality and modern energy for all". Proceedings of the National Academy of Sciences 116, nr 33 (29.07.2019): 16308–13. http://dx.doi.org/10.1073/pnas.1903610116.

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“Modern energy for all,” an internationally supported initiative to connect populations to electricity services, is expected to help reduce poverty-induced vulnerabilities. It has become a primary strategy for meeting sustainable development goals, especially in sub-Saharan Africa. However, when electricity is supplied by a capacity-constrained grid to a resource-constrained population, the service quality can vary both spatially and temporally. This research explores the quality of electricity services based on a case study of Unguja, Tanzania. Using 1) open-ended interviews, 2) detailed electricity-systems monitoring, and 3) household surveys, we show how voltage quality varies significantly, even within highly localized settings. Fluctuations result in dim lights at best and power outages and broken appliances at worst, denying many Unguja residents the expected benefits of access to modern energy. By combining an extensive understanding of the physical system together with interviews and surveys, this work presents a unique mapping of voltage quality in a system that is financially and physically constrained and highlights the consequences of poor-quality service for poor users.

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21

WADA, FUMIO. "Modern Technologies Utilized in Electric Power System. Utilization of Hydro Power Resource." Journal of the Institute of Electrical Engineers of Japan 116, nr 9 (1996): 590–92. http://dx.doi.org/10.1541/ieejjournal.116.590.

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22

FUTAKAWA, AKEMI. "Modern Technologies Utilized in Electric Power System. New Energy for Power Generation." Journal of the Institute of Electrical Engineers of Japan 116, nr 9 (1996): 593–98. http://dx.doi.org/10.1541/ieejjournal.116.593.

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23

Aravind, A. "A Novel Approach for Modern Power Conservation Using Hybrid Power Supply System". International Journal for Research in Applied Science and Engineering Technology 7, nr 3 (31.03.2019): 1251–54. http://dx.doi.org/10.22214/ijraset.2019.3225.

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24

Bodenstein, Max, Ingo Liere-Netheler, Frank Schuldt, Karsten von Maydell, Alexander K. Hartmann i Carsten Agert. "Optimized Power Flow Control to Minimize Congestion in a Modern Power System". Energies 16, nr 12 (8.06.2023): 4594. http://dx.doi.org/10.3390/en16124594.

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The growing integration of renewable energy sources (RES) into the power system causes congestion to occur more frequently. In order to reduce congestion in the short term and to make the utilization of the power system more efficient in the long term, power flow control (PFC) in the transmission system has been proposed. However, exemplary studies show that congestion will increase also in the distribution system if the transmission system is expanded. For this reason, the potential of PFC to reduce congestion in a model of a real 110 kV distribution system is investigated. Several Unified Power Flow Controller (UPFC) devices are optimized in terms of their number and placement in the power system, their size, control parameters, and costs, by using a Parallel Tempering approach as well as a greedy algorithm. Two optimization variants are considered, one reducing the number of degrees of freedom by integrating system knowledge while the other does not. It is found that near a critical grid state and disregarding costs, PFC can reduce congestion significantly (99.13%). When costs of the UPFCs are taken into account, PFC can reduce congestion by 73.2%. A basic economic analysis of the costs reveals that the usage of UPFCs is profitable. Furthermore, it is found that the reduction in the solution space of the optimization problem leads to better results faster and that, contrary to expectations, the optimization problem is simple to solve. The developed methods allow not only for the determination of the optimal use of UPFCs to minimize congestion, but also to estimate their profitability.

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25

Rimmerman, Craig A. "Teaching the Modern Presidency". Political Science Teacher 2, nr 3 (1989): 7–9. http://dx.doi.org/10.1017/s0896082800000684.

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The need to recognize institutional limits on presidents' abilities to translate their campaign promises into concrete public policy is a central theme characterizing much of the presidency literature during the past decade (Barger, 1984; Cronin, 1980; Hinckley, 1985; Light, 1983). Scholars have argued that the so-called “text-book presidency” (Cronin, 1980) paints an unrealistic picture of presidential power within the confines of a Madisonian framework of separated powers and checks and balances. Others have said that this unrealistic vision has contributed to the “cult of the presidency” (Hinckley, 1985), which is reinforced by the political socialization process and the media, thus leading to the “no-win” (Light, 1983) or “impossible” (Barger, 1984) presidencies. The notion of a plural executive, whose powers are fragmented throughout our Madisonian system has grown in popularity (King and Ragsdale, 1988). As a part of their recommendations for reform, virtually all of these authors emphasize correctly the potential role to be played by educators in imparting a more realistic understanding of the limitations of presidential power and outlining the potential consequences of hero worshipping for the occupant of the Oval Office. This article suggests an approach to teaching the presidency that rejects the notion that the president is the most important actor in the American political system. Instead, I will argue that we need to ask our students to consider the President as one actor in a highly fragmented political system, and to develop a more realistic view of both the sources and uses of presidential power within the broader context of democratic accountability and the development of citizenship.

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26

Sauhats, Antans, Diana Zalostiba, Aleksandrs Dolgicers, Andrejs Utans, Galina Bochkarjova, Edite Biela i Dmitrijs Antonovs. "Power System Simulation Laboratory as a Modern Educational Tool". International Journal of Systems Applications, Engineering & Development 15 (28.11.2021): 186–93. http://dx.doi.org/10.46300/91015.2021.15.27.

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To ensure the success of the personnel of power systems are required not only deep theoretical knowledge’s but also practical skills, the acquisition of which in modern universities is associated with considerable difficulties. The paper provides an overview of opportunities to overcome part of these difficulties by creating automation and protective relaying testing educational and research laboratory. To generate testing signals power system emergency processes records and simulation software are used. For education purposes microprocessorbased, suitable for digital input testing signals terminal is created

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27

Riekhoff, Harald von, i Jack S. Levy. "War in the Modern Great Power System, 1495-1975". International Journal 40, nr 4 (1985): 758. http://dx.doi.org/10.2307/40202324.

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Prabhakar, Kumar, Sachin K. Jain i Prabin Kumar Padhy. "Inertia estimation in modern power system: A comprehensive review". Electric Power Systems Research 211 (październik 2022): 108222. http://dx.doi.org/10.1016/j.epsr.2022.108222.

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Pois, Robert A., i Jack S. Levy. "War in the Modern Great Power System, 1495-1975". History Teacher 18, nr 2 (luty 1985): 294. http://dx.doi.org/10.2307/493946.

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Ndayishimiye, Vedaste, Xu Zhang, Deborah Nibagwire, Patrobers Simiyu, Giovanni Dushimimana i Sefu Bikorimana. "Environmental benefits of modern power system and clean energy". E3S Web of Conferences 107 (2019): 02006. http://dx.doi.org/10.1051/e3sconf/201910702006.

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Nowadays, the world is at a critical moment of facing serious environmental and economic problems. A very large number of people in developing countries is exposed to dangers associated with flammability and toxicity of traditional source of energy while others in industrialized countries are facing the effects of atmospheric air pollution and green house (GHG) gas emission .Despite the global reforestation policies, despite latest remarkable increase in renewable energy and natural gas production, there is still a problem of domination fuel and coal consumption. This paper explored the effects of rapid economic growth, industrial development on climate. Additionally the effects of continuous exponential population growth, a fast increase of energy global energy demand, conventional transport system on carbon and GHG emission have discussed. Finally the paper revealed how modern smart electricity system with sustainable energy system and electric transport system contribute to the reduction of hazardous emission.

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31

Pavella, Mania. "Power system transient stability assessment – traditional vs modern methods". Control Engineering Practice 6, nr 10 (październik 1998): 1233–46. http://dx.doi.org/10.1016/s0967-0661(98)00073-2.

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Gunduz, Hasan, i Dilan Jayaweera. "Modern power system reliability assessment with cyber-intrusion on heat pump systems". IET Smart Grid 3, nr 5 (1.10.2020): 561–71. http://dx.doi.org/10.1049/iet-stg.2020.0094.

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Ullah, Kaleem, Abdul Basit, Zahid Ullah, Fahad R. Albogamy i Ghulam Hafeez. "Automatic Generation Control in Modern Power Systems with Wind Power and Electric Vehicles". Energies 15, nr 5 (27.02.2022): 1771. http://dx.doi.org/10.3390/en15051771.

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The modern power system is characterized by the massive integration of renewables, especially wind power. The intermittent nature of wind poses serious concerns for the system operator owing to the inaccuracies in wind power forecasting. Forecasting errors require more balancing power for maintaining frequency within the nominal range. These services are now offered through conventional power plants that not only increase the operational cost but also adversely affect the environment. The modern power system emphasizes the massive penetration of wind power that will replace conventional power plants and thereby impact the provision of system services from conventional power plants. Therefore, there is an emergent need to find new control and balancing solutions, such as regulation reserves from wind power plants and electric vehicles, without trading off their natural behaviors. This work proposes real-time optimized dispatch strategies for automatic generation control (AGC) to utilize wind power and the storage capacity of electric vehicles for the active power balancing services of the grid. The proposed dispatch strategies enable the AGC to appropriately allocate the regulating reserves from wind power plants and electric vehicles, considering their operational constraints. Simulations are performed in DIgSILENT software by developing a power system AGC model integrating the generating units and an EVA model. The inputs for generating units are considered by selecting a particular day of the year 2020, when wind power plants are generating high power. Different coordinated dispatch strategies are proposed for the AGC model to incorporate the reserve power from wind power plants and EVs. The performance of the proposed dispatch strategies is accessed and discussed by obtaining responses of the generating units and EVs during the AGC operation to counter the initial power imbalances in the network. The results reveal that integration of wind power and electric vehicles alongside thermal power plants can effectively reduce real-time power imbalances acquainted in power systems due to massive penetration of wind power that subsequently improves the power system security. Moreover, the proposed dispatch strategy reduces the operational cost of the system by allowing the conventional power plant to operate at their lower limits and therefore utilizes minimum reserves for the active power balancing services.

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Wang, Xiuli, Fang Yao i Fushuan Wen. "Applications of Blockchain Technology in Modern Power Systems: A Brief Survey". Energies 15, nr 13 (21.06.2022): 4516. http://dx.doi.org/10.3390/en15134516.

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In the context of modern power system development to support the evolution towards green energy and carbon-neutral emission goals, many existing problems and even challenges demand new technical solutions. In recent years, decentralized blockchain technology has been employed to address some problems in power systems, and many papers have been published. In this paper, the concept of blockchain is first introduced. A brief survey of the existing publications regarding the applications of blockchain in power systems, including power system dispatching, microgrid operation, energy trading, electricity trading settlement, transmission, and distribution system operation, is then carried out. In addition, several application scenarios of blockchain technology in power systems are also introduced. Through the discussion, we found that we still need to weigh the advantages and disadvantages, overcome its leakage, and bring its value into play if we apply blockchain technology in modern power systems in support of zero carbon goals.

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35

Xu, Hui Yi. "Analysis of Power Flow on Power System with Wind Power Grid". Advanced Materials Research 860-863 (grudzień 2013): 275–79. http://dx.doi.org/10.4028/www.scientific.net/amr.860-863.275.

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With the continuous development of wind energy resources, wind power technology has been integrated into the modern power system. In this paper, according to the Power System Incorporating Wind Farm, selecting typical data distributed Power flow calculation of Built power network. According to data from the results show that grid-connected wind power system, Due to the directly affected by the influence of the wind speed size into the injection power, cause the whole trend distribution network is presented in a state of random changes, thereby affecting the network power loss of change. In order to improve the network voltage change, this paper puts forward some feasible measures to improve the network voltage method.

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36

Shariff, Shafiulla, Saraswathi H S, Meghana G R, Usha K i Archana K N. "Modern IoT Based Gardening System". International Journal for Research in Applied Science and Engineering Technology 10, nr 8 (31.08.2022): 1403–7. http://dx.doi.org/10.22214/ijraset.2022.46428.

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Abstract: This paper aims at developing an auto irrigation/gardening system with raspberry pi. This system is easy to manage as allusers are able to login by Smartphone and access the condition of garden. These features sense that, user can access the parameters of the land such as moisture, temperature etc. and also water flow can be controlled, as well as supplies the water when required. To implement this system soil moisture, temperature, humidity and sunlight are fed into microcontroller. Web server running on raspberry pi receives this data and can transit to the mobile phones or any other device, which requests the data. Based on the obtained data, end-user can then control the system remotely. The special feature of the model is that, the user will ensure if his/her need of the plants, herbs are served based on the right need and there is over/under usage of the water. A Web server along with a web page will help in user being notified about the requirements of the water when required.

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Senyuk, Mihail, Murodbek Safaraliev, Firuz Kamalov i Hana Sulieman. "Power System Transient Stability Assessment Based on Machine Learning Algorithms and Grid Topology". Mathematics 11, nr 3 (18.01.2023): 525. http://dx.doi.org/10.3390/math11030525.

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This work employs machine learning methods to develop and test a technique for dynamic stability analysis of the mathematical model of a power system. A distinctive feature of the proposed method is the absence of a priori parameters of the power system model. Thus, the adaptability of the dynamic stability assessment is achieved. The selected research topic relates to the issue of changing the structure and parameters of modern power systems. The key features of modern power systems include the following: decreased total inertia caused by integration of renewable sources energy, stricter requirements for emergency control accuracy, highly digitized operation and control of power systems, and high volumes of data that describe power system operation. Arranging emergency control in these new conditions is one of the prominent problems in modern power systems. In this study, the emergency control algorithms based on ensemble machine learning algorithms (XGBoost and Random Forest) were developed for a low-inertia power system. Transient stability of a power system was analyzed as the base function. Features of transmission line maintenance were used to increase accuracy of estimation. Algorithms were tested using the test power system IEEE39. In the case of the test sample, accuracy of instability classification for XGBoost was 91.5%, while that for Random Forest was 81.6%. The accuracy of algorithms increased by 10.9% and 1.5%, respectively, when the topology of the power system was taken into account.

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Gautam, Sushil Kumar, Ishta Garg, U. K. Choudhury i Shivam Gupta. "Forecasting of Power System Blackouts". International Journal of Advance Research and Innovation 5, nr 2 (2017): 114–17. http://dx.doi.org/10.51976/ijari.521720.

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Increasing electrical energy demand, modern Lifestyles and energy usage patterns have made the world fully dependant on power systems. This instigated mandatory requirements for the operators to maintain high reliability and stability of the power system grid. However, the power system is a highly nonlinear system, which changes its operations continuously. Therefore, it is very challenging and uneconomical to make the system be stable for all disturbances. Blackouts of electric power often result in huge economic losses to power grid enter prices and society. To indicate the losses of accidents, this paper introduces the concept of the accident cost of distribution network failure, analyzes the various factors affecting it . In this paper we use power simulator to forecasting for power system black out. Simulation performed on 9 bus system.

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Negnevitsky, Michael, Nikita V. Tomin i Christian Rehtanz. "Preventing Large-Scale Emergencies in Modern Power Systems: AI Approach". Journal of Advanced Computational Intelligence and Intelligent Informatics 18, nr 5 (20.09.2014): 714–27. http://dx.doi.org/10.20965/jaciii.2014.p0714.

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In recent years, due to liberalization, power systems are being operated closer and closer to their limits. At the same time, they have increased in size and complexity. Both factors increase the risk of major power outages and blackouts. In emergency and abnormal conditions, a power system operator has to deal with large amounts of data. However, due to emotional and psychological stress, an operatormay not be able to respond to critical conditions adequately and make correct decisions promptly. Mistakes can damage very expensive power system equipment or worse lead to major emergencies and catastrophic situations. Intelligent systems can play an important role by alarming the operator and suggesting the necessary actions to be taken to deal with a given emergency. This paper outlines some experience obtained at the University of Tasmania, Australia, Energy Systems Institute, Russia and TU-Dortmund University, Germany in developing intelligent systems for preventing large-scale emergencies and blackouts in modern power systems.

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Mohammed, Musa, i Abubakar Abdulkarim. "A Deep-Learning Approach to Load Modeling in Modern Power Distribution System". Journal of Applied Materials and Technology 3, nr 2 (14.09.2022): 1–6. http://dx.doi.org/10.31258/jamt.3.2.1-6.

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Modern Power Distribution Networks (MPDNs) are no longer passive because Distributed Generations (DGs) are integrated with them to enhance system reliability and power quality. For this reason, load modeling has to be updated to capture the new dynamics of active DNs. This paper presents a composite load modeling for a grid-connected photovoltaic (PV) distribution network using the Levenberg-Marquardt algorithm in the deep learning feed-forward neural network approach. Load modeling is constructing a relationship between input excitation(s) and output response(s); it can be used for simulation studies, stability analysis, and control/protection design. A grid-connected PV distribution network was modeled in Matlab/Simulink and generates data for training and model estimation. The estimated model was tested and validated using a laboratory experimental test bed. Results of the model exhibit a good fitness of 99.8% and 97.2% in active and reactive power models respectively during training. While 97.84% and 94.65% respectively were obtained during testing. The estimation errors were found to be 0.0025 and 0.0049 for active and reactive powers respectively with 0.0473 and 0.0701 corresponding errors in testing.

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Ullah, Kaleem, Abdul Basit, Zahid Ullah, Sheraz Aslam i Herodotos Herodotou. "Automatic Generation Control Strategies in Conventional and Modern Power Systems: A Comprehensive Overview". Energies 14, nr 9 (22.04.2021): 2376. http://dx.doi.org/10.3390/en14092376.

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Automatic generation control (AGC) is primarily responsible for ensuring the smooth and efficient operation of an electric power system. The main goal of AGC is to keep the operating frequency under prescribed limits and maintain the interchange power at the intended level. Therefore, an AGC system must be supplemented with modern and intelligent control techniques to provide adequate power supply. This paper provides a comprehensive overview of various AGC models in diverse configurations of the power system. Initially, the history of power system AGC models is explored and the basic operation of AGC in a multi-area interconnected power system is presented. An in-depth analysis of various control methods used to mitigate the AGC issues is provided. Application of fast-acting energy storage devices, high voltage direct current (HVDC) interconnections, and flexible AC transmission systems (FACTS) devices in the AGC systems are investigated. Furthermore, AGC systems employed in different renewable energy generation systems are overviewed and are summarized in tabulated form. AGC techniques in different configurations of microgrid and smart grid are also presented in detail. A thorough overview of various AGC issues in a deregulated power system is provided by considering the different contract scenarios. Moreover, AGC systems with an additional objective of economic dispatch is investigated and an overview of worldwide AGC practices is provided. Finally, the paper concludes with an emphasis on the prospective study in the field of AGC.

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Repetska, Anastasiia. "Interaction of Institutes of Legislative and Executive Powers in Modern Ukraine". Історико-політичні проблеми сучасного світу, nr 35-36 (20.12.2017): 351–56. http://dx.doi.org/10.31861/mhpi2017.35-36.351-356.

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Interaction between the institutions of state power ensures normal performing of their duties as entire state mechanism. It does not enable any of the branches of power. It is for this purpose that the founder of the division of power created a system of restraints and counter balances. To ensure their independence of one branch of government from another, it is necessary that each one has a real opportunity to influence another. Through the division of powers, the rule of law is organized and operates by legal means. At the same time, the principle of distribution of power is not so much a rigid division of functions and competences as the mechanism of their close interaction to solve problems of state formation. The interaction of the institutions of state power as the principle of the Constitutional system of Ukraine is currently a very topical problem, since our state is only at the prime of developing such institutions as an institution for the distribution and interaction of the branches of state power, and, therefore, needs the best possible solution to urgent problems. Keywords: Legislative branch of government, executive branch of government, interaction, powers of branches

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Khalyasmaa, Alexandra, Artem Aminev i Dmitry Bliznyuk. "Equipment State Assessment System Based on Adaptive Neuro-Fuzzy Inference System (ANFIS)". Applied Mechanics and Materials 792 (wrzesień 2015): 243–47. http://dx.doi.org/10.4028/www.scientific.net/amm.792.243.

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The paper is dedicated to analyze the modern expert systems to assess the technical condition of power stations and substations high-voltage equipment. The main problems of modern expert systems and their possible solutions are determined. As the structure and their basic construction principles are considered. Also this paper proposes an algorithm for the expert system model using fuzzy inference on the basis of technical diagnostics and tests. As a case study of assessment of power transformers state based on dissolved gas analysis in the oil is presented.

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Shrestha, Ashish, i Francisco Gonzalez-Longatt. "Frequency Stability Issues and Research Opportunities in Converter Dominated Power System". Energies 14, nr 14 (11.07.2021): 4184. http://dx.doi.org/10.3390/en14144184.

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Stable power supply has become a crucial thing in the current era of technology and automation. Although the power system has multiple stability issues and causes, frequency fluctuation plays a vital role in normal operation, whereby a system with significant frequency deviation can lead to the needless blackouts of the whole power system. With the rapid growth in power electronic converter (PEC)-based technologies and the huge penetration of nonsynchronous generators, the modern power system is becoming more complex by the day. This paper provides a comprehensive study on the stability issues that occur in modern power systems, mainly due to PEC-based technology integration. The in-depth reasons and the impacts of unstable power systems, along with their controlling techniques, are discussed to generate a clear understanding. Furthermore, the importance of frequency stability in a power system is discussed with respect to some important events that occurred in the past. This paper also discusses some potential techniques that could be performed to overcome the existing and/or upcoming challenges in the upgrading power system.

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O A, Ezechukwu. "Application of Comparators in Modern Power System Protection and Control". IOSR Journal of Electrical and Electronics Engineering 8, nr 3 (2013): 58–63. http://dx.doi.org/10.9790/1676-0835863.

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Peyghami, Saeed, Subham Sahoo, Huai Wang, Xiongfei Wang i Frede Blaabjerg. "The Role of Power Electronics in Modern Energy System Integration". Foundations and Trends® in Electric Energy Systems 5, nr 1 (2022): 1–74. http://dx.doi.org/10.1561/3100000027.

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Raza, Muhammad Qamar, Muhammad Usman Haider, S. Muhammad Ali, Muhammad Zeeshan Rashid i Farooq Sharif. "Demand and Response in Smart Grids for Modern Power System". Smart Grid and Renewable Energy 04, nr 02 (2013): 133–36. http://dx.doi.org/10.4236/sgre.2013.42016.

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Chen, Yu, Zhao Xu i Jacob Østergaard. "Security assessment for intentional island operation in modern power system". Electric Power Systems Research 81, nr 9 (wrzesień 2011): 1849–57. http://dx.doi.org/10.1016/j.epsr.2011.05.010.

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Barrueto Guzmán, Aldo, Héctor Chávez Oróstica i Karina A. Barbosa. "Stability Analysis: Two-Area Power System with Wind Power Integration". Processes 11, nr 8 (18.08.2023): 2488. http://dx.doi.org/10.3390/pr11082488.

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This paper focuses on a comprehensive stability study of a two-area power system with wind power integration and synthetic inertia control in each area, considering the effects of varying the interconnection link. Normally, synthetic inertia proposals are analyzed in one-area systems, in which stability is tested without considering transmission system phenomena, such as coherency. As modern power systems are progressively becoming interconnected, the possibility of forming two or more non-coherent areas is likely, which poses a challenge to synthetic inertia control techniques that use system frequency as a main feedback signal. In this context, this work addresses a crucial gap in the existing literature and provides a valuable starting point for studying more complex interconnected power systems with wind power integration. Simulations were performed in Matlab-Simulink considering a data-driven frequency dynamics model of the Chilean Electric System, and a wind power model with synthetic inertia control H2 norm minimization in each area. The results showed that it is possible to find local optimal feedback gains, preserving the stability of the global system under significant variations in the interconnection link. RoCoF and Nadir indicators are provided, highlighting the benefits of synthetic inertia control, particularly in low-inertia situations.

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Stachon, K., G. Dissertori, T. Gadek, M. Hansen, S. Lusin i W. Lustermann. "Modern high-availability multi-stage power distribution system for the CMS phase-2 upgrade". Journal of Instrumentation 18, nr 02 (1.02.2023): C02053. http://dx.doi.org/10.1088/1748-0221/18/02/c02053.

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Abstract The operation of CMS at the HL-LHC requires an upgrade of the readout electronics. These new modern micro-electronics require power at precise voltages between 1.2 V and 2.5 V. We will deliver this power using a 3-stage system, comprising AC-DC conversion to 380 V DC followed by radiation-tolerant 12 V DC-DC power converters feeding radiation-hard point-of-load DC-DC converter. We have studied an industrial 380 V AC-DC conversion system, featuring hot-swappable 3 kW power modules, stackable up to ∼1 MW system. Such systems are candidates for the first conversion step, feeding custom power supplies accepting 400 V DC input voltage. Our tests on one of the commercially available systems purchased from Eltek demonstrated that the system complied with our requirements, most notably in terms of maintainability, availability and power quality. A few measurement plots perceived by authors as particularly interesting are discussed in this contribution.

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