Relevant bibliographies by topics / Electrical energy transmission, networks and systems

Academic literature on the topic 'Electrical energy transmission, networks and systems'

Author: Grafiati
Published: 10 December 2022
Last updated: 4 July 2023

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Journal articles on the topic "Electrical energy transmission, networks and systems"

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KOTYSH, Andrii, Ivan SAVELENKO, and Kateryna PETROVA. "THE EXCESSIVE TECHNICAL LOSSES OF ELECTRICITY IN ELECTRICAL SYSTEMS OF POWER CONSUMPTION." Herald of Khmelnytskyi National University. Technical sciences 315, no. 6 (December 29, 2022): 69–73. http://dx.doi.org/10.31891/2307-5732-2022-315-6(2)-69-73.

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Reducing electricity losses in electrical networks is a complex complex problem that requires significant capital investments necessary for optimizing the development of electrical networks, improving the electricity accounting system, introducing new information technologies in marketing activities and managing network modes, training personnel and equipping them with means of testing measuring devices etc. In reality, in recent years, in connection with the inclusion of normative losses in the tariff for electric energy transmission services, a dangerous trend of adapting these norms to actual losses has emerged. The article analyzes the occurrence of power losses in electrical engineering systems and electrical networks of various voltage classes. Special attention is paid to the so-called excess losses, which are not taken into account during design and operation. These losses occur in insulators, linear fittings, current-limiting reactors, electricity meters, windings of current and voltage transformers, etc. Excessive losses of electricity in electric networks are direct financial losses of electric power companies. Savings from reducing losses could be directed to technical re-equipment of networks; staff salary increase; improvement of the organization of electricity transmission and distribution; increasing the reliability and quality of electricity supply to consumers. Unaccounted losses reach approximately 1% of the total amount. This fact must be taken into account. Because currently we are talking about millions of losses.
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Schröter, Tamara, André Richter, Jens Götze, André Naumann, Jenny Gronau, and Martin Wolter. "Substation Related Forecasts of Electrical Energy Storage Systems: Transmission System Operator Requirements." Energies 13, no. 23 (November 25, 2020): 6207. http://dx.doi.org/10.3390/en13236207.

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The growth in volatile renewable energy (RE) generation is accompanied by an increasing network load and an increasing demand for storage units. Household storage systems and micro power plants, in particular, represent an uncertainty factor for distribution networks, as well as transmission networks. Due to missing data exchanges, transmission system operators cannot take into account the impact of household storage systems in their network load and generation forecasts. Thus, neglecting the increasing number of household storage systems leads to increasing forecast inaccuracies. To consider the impact of the storage systems on forecasting, this paper presents a new approach to calculate a substation-specific storage forecast, which includes both substation-specific RE generation and load forecasts. For the storage forecast, storage systems and micro power plants are assigned to substations. Based on their aggregated behavior, the impact on the forecasted RE generation and load is determined. The load and generation are forecasted by combining several optimization approaches to minimize the forecasting errors. The concept is validated using data from the German transmission system operator, 50 Hertz Transmission GmbH. This investigation demonstrates the significance of using a battery storage forecast with an integrated load and generation forecast.
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Poletaev, I. Yu. "Reduction theloss of electrical energy during transmission and distribution through electric networks is a priority in the digitalization of the electric power industry, the constructionand digital economy of the Russian Federation." Bulletin of Russian academy of natural sciences 23, no. 2 (2023): 137–42. http://dx.doi.org/10.52531/1682-1696-2023-23-2-137-142.

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The problem of reducing losses of electric energy during transmission and distribution through electric networks is one of the key tasks for most electric grid companies in Russia. The task of developing remote control technologies has actually been set by the Government to all subjects of the electric power industry in the regions of Russia. The article discusses the issues of the introduction of IT technologies as measures to reduce the loss of electrical energy during its transmission over networks. Proposals have been developed on the organizational, investment and economic components of creating electric systems with an intelligent network in our country.
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Naumov, Igor, Sergey Podyachikh, Marina Polkovskaya, and Aleksandr Tretyakov. "Green technologies use in the smart grid construction in rural power supply systems." BIO Web of Conferences 42 (2022): 03006. http://dx.doi.org/10.1051/bioconf/20224203006.

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The article considers the using intelligent controls possibility in low-voltage rural electric networks to minimize the unbalance modes consequences. The proposed technology includes the digital data transmission compilation on the electrical energy parameters with a new balancing technical means the electrical network operating mode. Digital feedback is provided for changes the balancing device (BD) parameters by the unbalancing power consumption changing level. Based on the developed methods compilation, software for calculating unbalancing modes has been created, which makes it possible to assess the currents and voltages unbalancing effect on the power quality and its additional losses change. The “green” technology proposed version, which increases the economic and the electric energy environmental safety use in the rural electric power industry, contains a new constructive solution for the balancing device implementation. The proposed technology was tested on the measurement data basis in existing electrical networks. Based on the MALAB technologies use, changes studied indicators visualization in the before and after BD integration in the electrical network was carried out and its analysis was makes. Used on the “neural networks” MALAB technology, a preventive assessment of the unbalancing power consumption events development in the investigated operating electrical network is presented, as well as the proposed technology effectiveness assessment was carried out.
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Stupak, Maryna, and Hlib Stupak. "THE INTERNET OF ENERGY CONCEPT FOR MANAGEMENT OF ELECTRICAL NETWORK FACILITIES." Naukovyi visnyk Donetskoho natsionalnoho tekhnichnoho universytetu, no. 1-2 (2022): 152–61. http://dx.doi.org/10.31474/2415-7902-2022-1(8)-2(9)-152-161.

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Purpose. Determination of a promising way of managing electric networks in the conditions of an increase in the number of implemented distributed generation facilities using renewable sources. Dispatch systems are the object, methods of building dispatch systems are the subject. Methods. Research was carried out on the basis of system and elemental-structural approaches. Results. The article analyzes the subject industry and the evolution of energy facility management systems. The relevance of the work lies in the acute study of modern approaches to the management of electric power facilities, designed to change not only management methods, but also to generally revise the concept of modernization of existing systems and construction of new networks. It has been determined that information networks become not only the means of communication between people, but also open completely new ways of exchanging telemetric information regarding the management of technological processes between devices. The energy sector is no exception, where every year the penetration of telecommunication technologies is deepening, creating new approaches to the management of energy systems of electricity generation and distribution. The work considers ways of organizing network management and increasing its stability with a decrease in the level of inertia, based on the use of differential meters, the concept of hot backup, the use of intelligent forecasting and information exchange technologies, and the introduction of modern communication technologies, and parallels between the levels of power distribution and data transmission in information networks. Scientific novelty. It has been offered to increase the efficiency of management in electrical networks with distributed generation with the help of energy routers. Practical significance. The work proves that the IoE concept is the most promising for the use in power grids in the conditions of an increase in the number of distributed objects of small generation.
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S., SHEVCHENKO, DANYLCHENKO D.O., and KUZNETSOV D.S. "USE OF SOFTWARE FOR IMPROVING THE EFFICIENCY OF MODELING ENERGY NETWORKS." Journal of Electrical and power engineering 26, no. 4 (May 24, 2022): 17–28. http://dx.doi.org/10.31474/2074-2630-2022-1-17-28.

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The article is devoted to the topical issue of power grid modeling. The article discusses positive and negative features of simulation programs. Particular attention is paid to the principles of the programs. Such programs as PSS®SINCAL from Siemens; ETAP from Operation Technology and PowerFactory from DIgSILENT GmbH are considered in the article. The PSS®SINCAL software specializes in designing networks from low to ultra-high voltage classes, in symmetrical and non-symmetrical modes of operation, takes into account the installation possibilities of compensating devices and gives recommendations for their installation locations. Basic models enabling mode calculations and shortcircuit calculations as well as simulation of electromagnetic transients are used as the basis of the PSS®SINCAL software. The basic modules include steady state calculations, calculations of short circuit currents, harmonics, system stability and electromagnetic transients. Particular attention is paid to the optimization and planning module, namely reactive power optimization. The module of reactive power optimization in PSS®SINCAL offers methods of optimizing existing equipment by finding the best switching points for reactive power compensation. ETAP software specializes in electrical network and power transmission design. ETAP Grid™ connects network design with detailed substation models, SCADA systems, and real-time transmission network management. This paper covers only 2 modules of ETAP software, namely transmission and distribution modules. PowerFactory captures the full range of functionality from standard features to highly sophisticated and advanced applications, including wind power, distributed generation, real-time modeling, and performance monitoring for testing of surveillance systems. This article reviews only 2 modules of the PowerFactory software, namely the electrical power transmission and distribution modules. The paper reviews the programs and concludes that Siemens' PSS®SINCAL software would be the most successful solution for modeling electric grids and accounting for the effects of compensating devices on voltage levels in electric grids.
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Nikolaidis, Alexandros I., Francisco M. Gonzalez-Longatt, and C. A. Charalambous. "Indices to Assess the Integration of Renewable Energy Resources on Transmission Systems." Conference Papers in Energy 2013 (May 23, 2013): 1–8. http://dx.doi.org/10.1155/2013/324562.

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The continuous increase on the penetration levels of Renewable Energy Sources (RESs) in power systems has led to radical changes on the design, operation, and control of the electrical network. This paper investigates the influence of these changes on the operation of a transmission network by developing a set of indices, spanning from power losses to GHG emissions reduction. These indices are attempting to quantify any impacts therefore providing a tool for assessing the RES penetration in transmission networks, mainly for isolated systems. These individual indices are assigned an analogous weight and are mingled to provide a single multiobjective index that performs a final evaluation. These indices are used to evaluate the impact of the integration of RES into the classic WSCC 3-machine, 9-bus transmission network.
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Khalil, Umair, Muhammad Yousaf Ali Khan, Umer Amir Khan, and Shahid Atiq. "Power Flow Control by Unified Power Flow Controller." April 2020 39, no. 2 (April 1, 2020): 257–66. http://dx.doi.org/10.22581/muet1982.2002.04.

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The demand of energy usage is increasing rapidly and to meet the energy requirements, best possible transmission systems should be adopted to avoid energy losses in our transmission systems. In Pakistan’s WAPDA (Water & Power Development Authority) system, the rapid increase in load and less generation capacity has increased load shedding thought the country. The government has planned to increase the generation capacity but the supply companies are facing line load-ability, environmental constraints, power limitations problems etc. Most of the supply companies prefer to extend the existing electrical networks instead of building new network to reduce financial burdens. In this paper the implementation of the FACTS (Flexible AC Transmission Systems) Devices in an electrical network is described. The FACTS devices enhance power transfer capacity of the line without adding new transmission line. These devices also protect the system from overloading in case of any contingency in the electrical network. The control of power flow, reactive power compensation and voltage control are the main capabilities of FACTS devices. This paper describes the impacts of FACTS devices on improving the voltage stability and power handling capability of a transmission line. The proposed methods for the controllable flow of active and reactive power in a transmission line are also elaborated. A simple electrical system is examined to explain the improvement in the constraints of power system using FACTS devices.
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Hovorov, P. P., K. V. Hovorova, А. К. Kindinova, and O. Abdelrahim. "SMART GRID TECHNOLOGY, TRANSMISSION OF ELECTRICAL ENERGY IN POWER SUPPLY AND LIGHTING SYSTEMS OF CITIES." Bulletin of the National Technical University "KhPI". Series: Energy: Reliability and Energy Efficiency, no. 1 (1) (December 30, 2020): 10–14. http://dx.doi.org/10.20998/2224-0349.2020.01.02.

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Modern power supply and lighting systems of cities are complex electrical systems of an automated type, in which the processes in individual power supply systems and city lighting systems are interconnected and interdependent. Therefore, the search for efficient technologies for the transmission of electrical energy in them is an extremely difficult task. The real state of the power supply and lighting systems in cities today is characterized by low operating efficiency, largely due to the low quality of electrical energy and insufficient compensation of reactive power in them. The mutual influence of power supply and lighting systems in cities, as well as the presence of significant voltage deviations and the overflow of additional reactive power in the networks, causes an increase in voltage and power losses in them, as well as a decrease in the efficiency of networks and connected consumers, in general. Unfortunately, the existing methods and technical means based on them cannot fully solve this problem. The research carried out made it possible to clarify the nature of the processes in the power supply systems and the sanitation of cities and to determine the methods and technical means based on the Smart Grid concept. They are based on the use of phase-shifting booster transformers with an electronic control system. Their use made it possible to provide the possibility of complex control of the voltage modes of active and reactive power with the possibility of installation at any point in the network and centralized control from a single centre. The calculations show that the use of the developed methods and technical means provides an opportunity to reduce power losses in networks by 10–15% and energy costs for consumers by 50–75%.
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Yahya, Kabiru Abubakar. "Analysis of 132-33 KVA Grid Sub-Transmission Line along Gombe to Yola Power System of Nigeria." International Journal for Research in Applied Science and Engineering Technology 11, no. 6 (June 30, 2023): 1122–29. http://dx.doi.org/10.22214/ijraset.2023.53497.

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Abstract: In Nigeria, effective electric power transmission is a top priority. Power generating and the network of power distribution are connected via electric power transmission. A research project was conducted to determine the status of the networks in order to improve performance, which resulted in the performance evaluation of the 132KV Sub-transmission lines. Data from the Transmission Company of Nigeria (TCN) substations under investigation were utilized in the research work. The Gombe-Yola Sub-region's 132KV networks are divided into two 132KV active networks and 11 33KV active networks, with a total of 443.617MVA in active loads connected to the 33KV buses. The network was modeled and simulated using the Electrical Transient Analyzer Program (ETAP 12.6), and the bus voltages and network power losses were investigated using MATLAB and Simulink. It was discovered during simulation that the bulk of the network's equipment, including transformers, buses, and transmission lines, experience numerous disturbances that result in forced outages and a corresponding loss of load and productivity. All transformers were critically loaded based on the results of the base-case simulation, with several exceeding 100% loading. As bus voltage magnitudes went outside the +/- 5% nominal rated values, the percentage operational bus voltages were below threshold. Additionally, the systems had undesirable power factor levels. Threatening discoveries prompted an effort to strengthen the networks. In this study, three system enhancement algorithms—capacitor placement, transformer upgrade, and transformer load tap modifications—were applied. To get the best outcome, these algorithms were successively stacked. As a result of significant system improvements, both networks' performance in the final simulation result was within allowable bounds. System-wide apparent losses decreased to a 50% reduction enhancing the networks' efficiency in the process.
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Dissertations / Theses on the topic "Electrical energy transmission, networks and systems"

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Clegg, Stephen. "Integrated modelling of electrical and gas transmission networks in multi-energy systems." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/integrated-modelling-of-electrical-and-gas-transmission-networks-in-multienergy-systems(e1b07a2b-8bd2-472d-8274-8d54978e9770).html.

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The scope of this thesis is an investigation into the interactions between the gas and electrical transmission networks in the context of a low-carbon energy system with explicit considerations of the role played by multi-energy vectors, including heating, in future scenarios. Many energy systems are in a state of transition due to the growing need to reduce their carbon impact while maintaining reliability and reducing costs. The generation capacity of gas-fuelled power stations, as a cleaner alternative to coal, has been continuing to grow in many power systems. Furthermore, their operational characteristics are evolving as they are increasingly used to meet demand when there is a shortfall in renewable generation and are playing a role in contributing to the reliability of the power system. Additionally, changes to the heating sector (e.g., the electrification of heat or the increased use of combined heat-and-power) and the introduction of power-to-gas (to convert excess renewable electricity into hydrogen for successive energy generation) all lead to tighter interactions between the heat, gas and power sectors which require a multi-energy framework to assess. In this work this is achieved, firstly, through the development of integrated gas and power network modelling techniques. The power system modelling incorporates a multi-temporal DC optimal power flow, while gas network models use steady-state and transient flow analysis to allow for an assessment of the pressures and flows around the network. Additionally, a novel heat model is presented for a regional assessment of the heating demands of the British energy system, so that the impacts of changes to heating technologies on the gas and electrical transmission networks can be quantified in whole-energy system case studies. Power-to-gas technologies where (excess renewable) electrical energy is converted to hydrogen and then potentially synthetic natural gas which is then injected into the gas network where it can be stored and transported have the potential to increase the integration of renewable resources and reduce the carbon impact of both electricity and heating sectors. Models are presented which assess the operation of power-to-gas and its impact on the gas and electrical transmission networks as well as the benefits to the energy system. This uses power system modelling to assess the excess renewable energy (from wind and solar resources) that can be used in the power-to-gas process, with the amounts of produced hydrogen and synthetic natural gas also being evaluated considering constraints imposed by the gas network. The resulting case studies evaluate the impact on the gas and electrical networks and the benefit to the energy system by displacing natural gas and reducing carbon emissions. To assess the extent to which gas power stations can change their output to follow changes in renewable generation output, an integrated gas and electrical network flexibility model has been developed. This uses the notion of zonal linepack flexibility and allows for limits to be applied to the ability of gas turbines to change their output over the forthcoming hours with consideration of the intermittent nature of renewable generation. The developed models and methodologies are incorporated into a number of case studies using the British gas and electrical networks and heating sector showing their applicability to assessing future energy system needs.
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Qiao, Wei. "Integrated control of wind farms, facts devices and the power network using neural networks and adaptive critic designs." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/29716.

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Thesis (Ph.D)--Electrical and Computer Engineering, Georgia Institute of Technology, 2009.
Committee Chair: Ronald G. Harley; Committee Member: David G. Taylor; Committee Member: Deepakraj M. Divan; Committee Member: Ganesh Kumar Venayagamoorthy; Committee Member: Thomas G. Habetler. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Lazaro, Orlando. "CMOS inductively coupled power receiver for wireless microsensors." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/51874.

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This research investigates how to draw energy from a distant emanating and alternating (i.e., AC) magnetic source and deliver it to a battery (i.e., DC). The objective is to develop, design, simulate, build, test, and evaluate a CMOS charger integrated circuit (IC) that wirelessly charges the battery of a microsystem. A fundamental challenge here is that a tiny receiver coil only produces mV's of AC voltage, which is difficult to convert into DC form. Although LC-boosted diode-bridge rectifiers in the literature today extract energy from similar AC sources, they can do so only when AC voltages are higher than what miniaturized coils can produce, unless tuned off-chip capacitors are available, which counters the aim of integration. Therefore, rather than rectify the AC voltage, this research proposes to rectify the current that the AC voltage induces in the coil. This way, the system can still draw power from voltages that fall below the inherent threshold limit of diode-bridge rectifiers. Still, output power is low because, with these low currents, small coils can only extract a diminutive fraction of the magnetic energy available, which is why investing battery energy is also part of this research. Ultimately, the significance of increasing the power that miniaturized platforms can output is higher integration and functionality of micro-devices, like wireless microsensors and biomedical implants.
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Yow, Thiam Poh. "Tunneled data transmission over wireless sensor networks." Thesis, Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion-image.exe/07Dec%5FYow.pdf.

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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, December 2007.
Thesis Advisor(s): McEachen, John C. ; Tummala, Murali. "December 2007." Description based on title screen as viewed on January 24, 2008. Includes bibliographical references (p. 73-74). Also available in print.
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Condò, Marco. "Electrical characterization of innovative insulating materials for HVDC energy transmission cable systems." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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La tesi si è svolta nel corso di uno stage di quasi nove mesi all'interno del laboratorio elettrico di alta tensione del reparto R&D di Prysmian, leader mondiale dei sistemi elettrici in cavo. La tesi si è articolata nelle fasi seguenti: 1) analisi dei fondamenti teorici dei sistemi elettrici in cavo ad alta tensione in corrente continua (HVDC); 2) caratterizzazione elettrica di materiali isolanti innovativi per lo sviluppo di sistemi in cavo HVDC. Più in dettaglio tale caratterizzazione è consistita nelle fasi seguenti: a) progettazione e/o realizzazione dei set-up di prova; b) esecuzione delle prove di conducibilità elettrica su provini piani di materiale isolante costituiti da diverse mescole candidate per la realizzazione di cavi modello nella seconda parte della caratterizzazione (vedi seguito); c) elaborazione dei dati delle prove di cui al punto b) per ricavare i parametri σ0, α e β della conducibilità di ogni mescola isolante testata - e quindi l’andamento della conducibilità delle mescole in funzione della temperatura e del gradiente elettrico – così da selezionare le mescole migliori per la realizzazione dei cavi modello (cavi in scala ridotta con dimensioni standardizzate realizzati ai fini di prove di sviluppo); d) esecuzione delle prove di tenuta in AC sui cavi modello selezionati; e) esecuzione delle prove di rigidità ad impulso atmosferico su cavi modello; f) esecuzione delle prove di stabilità termica su cavi modello. I risultati di tutte le prove condotte hanno consentito di determinare quali fossero, tra tutte le mescole prese in esame, le più performanti dal punto di vista elettrico.
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Chen, Chao. "Energy-efficient electrical and silicon-photonic networks in many core systems." Thesis, Boston University, 2014. https://hdl.handle.net/2144/10962.

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Thesis (Ph.D.)--Boston University
During the past decade, the very large scale integration (VLSI) community has migrated towards incorporating multiple cores on a single chip to sustain the historic performance improvement in computing systems. As the core count continuously increases, the performance of network-on-chip (NoC), which is responsible for the communication between cores, caches and memory controllers, is increasingly becoming critical for sustaining the performance improvement. In this dissertation, we propose several methods to improve the energy efficiency of both electrical and silicon-photonic NoCs. Firstly, for electrical NoC, we propose a flow control technique, Express Virtual Channel with Taps (EVC-T), to transmit both broadcast and data packets efficiently in a mesh network. A low-latency notification tree network is included to maintain t he order of broadcast packets. The EVC-T technique improves the NoC latency by 24% and the system energy efficiency in terms of energy-delay product (EDP) by 13%. In the near future, the silicon-photonic links are projected to replace the electrical links for global on-chip communication due to their lower data-dependent power and higher bandwidth density, but the high laser power can more than offset these advantages. Therefore, we propose a silicon-photonic multi-bus NoC architecture and a methodology that can reduce the laser power by 49% on average through bandwidth reconfiguration at runtime based on the variations in bandwidth requirements of applications. We also propose a technique to reduce the laser power by dynamically activating/deactivating the 12 cache banks and switching ON/ OFF the corresponding silicon-photonic links in a crossbar NoC. This cache-reconfiguration based technique can save laser power by 23.8% and improves system EDP by 5.52% on average. In addition, we propose a methodology for placing and sharing on-chip laser sources by jointly considering the bandwidth requirements, thermal constraints and physical layout constraints. Our proposed methodology for placing and sharing of on-chip laser sources reduces laser power. In addition to reducing the laser power to improve the energy efficiency of silicon-photonic NoCs, we propose to leverage the large bandwidth provided by silicon-photonic NoC to share computing resources. The global sharing of floating-point units can save system area by 13.75% and system power by 10%.
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Khan, Nabeel Pervaiz. "Energy efficient communication and rate control algorithms for wireless sensor networks." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 114 p, 2009. http://proquest.umi.com/pqdweb?did=1818417511&sid=4&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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Lopes, Luiz Antonio Correa. "On the utilization of force-commutated AC controllers in AC power transmission systems." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40387.

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Recent economic pressures to enhance the transmission capability and controllability of existing power systems have led the new concept of Flexible AC Transmission System (FACTS). The use of power electronics in fast acting power controllers is one of the backbones of the implementation of FACTS.
This thesis deals with the use of force-commutated Pulse Width Modulated (PWM) ac controller technology in phase-shifting and var compensation applications. The proposed technology employes as the building block a 4-switch PWM ac controller, which is controlled by means of duty cycle variation. The difficulties of using PWM in high power applications are overcome with a new multi-module PWM ac controller operated with symmetrically phase shifted carriers. This solution results in harmonic cancellation and consequently in high quality (less distortion) waveforms with the power switches (GTO) switching at low frequencies, thus keeping the communication losses low. The resulting power controllers can be considered as intermediate FACTS devices in terms of performance and flexibility.
An application of one phase-shifter and two var compensators in a tie line is also proposed for suppressing inter-area power oscillations. In this scheme the inter-area mode is deactivated if the FACTS devices keep constant the active and reactive power that flow in the tie line. Furthermore, the two interconnected subsystems were virtually decoupled with the proposed approach, in the sense that the small signal disturbances that occur in one side of the tie line do not affect the machines of the other side.
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Farhat, Jamil de Araujo. "Eficiência energética e throughput seguros em decode-and-forward seletivo com alocação de potência distribuída." Universidade Tecnológica Federal do Paraná, 2015. http://repositorio.utfpr.edu.br/jspui/handle/1/1368.

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Investiga-se a eficiência energética e o throughput seguros em sistemas de comunicações sem fio cooperativos, em que um par de usuários legítimos (Alice e Bob) são auxiliados por um nó relay e em que a comunicação ocorre na presença de um espião passivo (Eve). Diversos protocolos cooperativos são comparados em relação a estas medidas e se utiliza um algoritmo iterativo e distribuído, baseado no algoritmo Dinkelbach, para alocação de potência entre Alice e o relay. A alocação de potência é utilizada visando maximizar a eficiência energética segura, medida em bits seguros/J/Hz, ou o throughput seguro, medido em bits seguros/s/Hz. Em relação aos protocolos, consideramos o caso onde Alice tem conhecimento perfeito do estado instantâneo do canal apenas em relação aos usuários legítimos. Desta forma, empregamos o protocolo Decode-and-Forward Seletivo (SDF), que realiza a escolha entre o melhor tipo de comunicação entre Alice e Bob (comunicação direta ou cooperativa) de forma a aumentar a segurança do sistema. Para comparação, consideramos outros esquemas clássicos de cooperação como o Amplify-and-Forward (AF), Decode-and-Forward Fixo (DF) e o Cooperative Jamming (CJ). Nossos resultados demostram que o SDF supera o AF, o DF e o CJ em grande parte das situações. Contudo, quando a taxa de transmissão aumenta ou quando Eve está muito próxima aos nós legítimos, o CJ apresenta um melhor desempenho.
We investigate the secure energy efficiency and throughput in cooperative wireless communications systems, in which a pair of legitimate users (Alice and Bob) are assisted by a relay node and the communication occurs in the presence of a passive eavesdropper (Eve). Several cooperative protocols are compared with respect to these measures and we use of an iterative and distributed algorithm, based on Dinkelbach algorithm, to allocate power between Alice and the relay. The power allocation is performed in order to increase the secure energy efficiency, measured in secure bits/J/Hz, or secure throughput, measured in secure bits/s/Hz. About the protocols, we consider the case where Alice has perfect knowledge only about the instantaneous channel state of the legitimate channel. So, we employ a Selective Decode-and-Forward (SDF) protocol, which chooses the best type of communication between Alice and Bob (direct or cooperative communication) in order to improve security. For comparison, we consider other classical cooperative schemes such as the Amplify-and-Forward (AF), the Fixed Decode-and-Forward (DF) and the Cooperative Jamming (CJ). Our results show that SDF outperforms AF, DF and CJ in most situations. However, when the transmit rate increases or when Eve is close to the legitimate nodes, CJ has a better performance.
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Okumu, Elizabeth Mukhwana. "Performance evaluation of cross-layer energy-efficient transmit antenna selection for spatial multiplexing systems." Doctoral thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/28111.

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Abstract Multiple-input multiple-output (MIMO) and cognitive radio (CR) are key techniques for present and future high-speed wireless technologies. On the other hand, there are rising energy costs and greenhouse emissions associated with the provision of high-speed wireless communications. Consequently, the design of high-speed energy efficient systems is paramount for next-generation wireless systems. This thesis studies energy-efficient antenna selection for spatial multiplexing multiple-antenna systems from a cross-layer perspective, contrary to the norm, where physical-layer energy efficiency metrics are optimized. The enhanced system performance achieved by cross-layer designs in wireless networks motivates this research. The aim of the thesis is to propose and analyze novel cross-layer energy-efficient transmit antenna selection schemes that enhance energy efficiency and system performance - with regard to throughput, transmission latency, packet error rate and receiver buffer requirements. Firstly, this thesis derives the analytical expression for data link throughput for point-to-point spatial multiplexing multiple-antenna systems - which include MIMO and underlay CR MIMO systems - equipped with linear receivers with N-process stop-and-wait (N-SAW) as the automatic repeat request (ARQ) protocol. The performance of cross-layer transmit antenna selection, which maximizes the derived throughput metric, is then analyzed. The impact of packet size, number of SAW processes and the stalling of packets inside the receiver reordering buffer is considered in the investigation. The results show that the cross-layer approach, which takes into account system characteristics at both the data link and physical layers, has superior performance in comparison with the conventional physical-layer approach, which optimizes capacity. Secondly, this thesis proposes a cross-layer energy efficiency metric, based on the derived system throughput. Energy-efficient transmit antenna selection for spatial multiplexing MIMO systems, which maximizes the proposed cross-layer energy efficiency metric, by jointly optimizing the transmit antenna subset and transmit power, subject to spectral efficiency and transmit power constraints, is then introduced and analyzed. Additionally, adaptive modulation is incorporated into the proposed cross-layer scheme to enhance system performance. Cross-layer energyefficient transmit antenna selection for underlay CR MIMO systems, where interference constraints now come into play, is then considered. Lastly, this thesis develops novel reduced complexity versions of the proposed cross-layer energyefficient transmit antenna selection schemes - along with detailed complexity analysis - which shows that the proposed cross-layer approach attains significant energy efficiency and performance gains at affordable computational complexity.
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Books on the topic "Electrical energy transmission, networks and systems"

1

Zhang, Xiao-Ping. Flexible AC Transmission Systems: Modelling and Control. 2nd ed. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012.

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Anderson, Leland I. Nikola Tesla's concepts for transmission of electrical energy without wires: A review. Denver, Colo: L. Anderson, 1999.

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Alcorn, Raymond, and Dara O'Sullivan. Electrical design for ocean wave and tidal energy systems. Edited by Institution of Engineering and Technology. Stevenage, U.K: Institution of Engineering and Technology, 2013.

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Manjarekar, N. S. Nonlinear Control Synthesis for Electrical Power Systems Using Controllable Series Capacitors. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012.

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Steffen, Rebennack, Pardalos, P. M. (Panos M.), 1954-, Iliadis Niko A, Pereira Mario V. F, and SpringerLink (Online service), eds. Handbook of Networks in Power Systems II. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012.

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Vukosavić, Slobodan N. Electrical Machines. New York, NY: Springer New York, 2013.

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Mediterranean Electrotechnical Conference (5th 1989 Lisbon, Portugal). Integrating research, industry and education in energy and communication engineering: Proceedings. [New York, USA]: IEEE, 1989.

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Steffen, Rebennack, Pardalos, P. M. (Panos M.), 1954-, Iliadis Niko A, Pereira Mario V. F, and SpringerLink (Online service), eds. Handbook of Networks in Power Systems I. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012.

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Khaitan, Siddhartha Kumar. High Performance Computing in Power and Energy Systems. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013.

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Gers, Juan M. Protection of electricity distribution networks. 2nd ed. London: The Institution of Electrical Engineers, 2004.

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Book chapters on the topic "Electrical energy transmission, networks and systems"

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Abbasi, Shahriar, and Hamdi Abdi. "Robust Transmission Network Expansion Planning (IGDT, TOAT, Scenario Technique Criteria)." In Robust Optimal Planning and Operation of Electrical Energy Systems, 199–218. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-04296-7_11.

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Patel, Ujjaval, Praghnesh Bhatt, and Nilesh Chothani. "Transmission Line Protection Philosophy." In Energy Systems in Electrical Engineering, 1–19. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8465-7_1.

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Andersson, Göran, Thilo Krause, and Wil Kling. "Introduction to the Transmission Networks." In Transition to Renewable Energy Systems, 723–39. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527673872.ch35.

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Patel, Ujjaval, Praghnesh Bhatt, and Nilesh Chothani. "Transmission Line Protection: Issues and Research Needs." In Energy Systems in Electrical Engineering, 21–33. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8465-7_2.

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Paulun, T., and H. J. Haubrich. "Long-term and Expansion Planning for Electrical Networks Considering Uncertainties." In Energy Systems, 391–408. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-02493-1_17.

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Kim, Seong Cheol, Jun Heon Jeon, and Hyun Joo Park. "Energy Efficient Data Transmission Mechanism in Wireless Sensor Networks." In Lecture Notes in Electrical Engineering, 845–52. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6516-0_93.

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Makwana, Vijay H., and Bhavesh R. Bhalja. "Digital Distance Relaying Scheme for Parallel Transmission Lines During Inter-circuit Faults." In Energy Systems in Electrical Engineering, 65–88. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-1572-4_4.

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Makwana, Vijay H., and Bhavesh R. Bhalja. "Digital Distance Relaying Scheme for Phase Faults on Double Infeed Transmission Lines." In Energy Systems in Electrical Engineering, 139–55. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-1572-4_7.

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Endrjukaite, Tatiana, Alexander Dudko, Leon R. Roose, and Kevin Davies. "Routed Energy Distribution Network Concept with Electrical Energy Router." In Lecture Notes in Networks and Systems, 511–20. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44610-9_50.

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Minne, Liz, Arka Pandit, John C. Crittenden, Miroslav M. Begovic, Insu Kim, Hyunju Jeong, Jean Ann James, et al. "Energy and Water Interdependence, and Their Implications for Urban Areas." In Electrical Transmission Systems and Smart Grids, 239–70. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-5830-2_8.

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Conference papers on the topic "Electrical energy transmission, networks and systems"

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Zaitsev, Ievgen O., Igor V. Blinov, Victorii O. Bereznychenko, and Serhiy A. Zakusilo. "Electrical Transmission Line Damage Identification System for Distribution Electrical Networks." In 16th IC Measurement and Control in Complex Systems. Vinnytsia: VNTU, 2022. http://dx.doi.org/10.31649/mccs2022.21.

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In the paper shows, that one of the important directions of the development of the electric power industry both in the world and in Ukraine is the improvement and construction of electric power networks and systems according to the Smart Grid concept. The main idea of such systems is a reliable, energy-efficient and high-quality energy supply, which based on the growing role of management as a leading factor in the innovative development of electric power and the construction of high-performance information and computing infrastructure. One of the main components of Smart Grid is the diagnosis of emergency modes and damage monitoring. This is because damage to electrical networks affects the quality and reliability of electricity supply to consumers. Therefore, the task of quickly and accurately determining the place of damage is important. The effective solution of this problem gives a significant economic effect due to the reduction of power supply interruptions, the reduction of transport costs for bypassing electrical networks, and the minimization of the total time for the organization of repair and restoration works. It shown that one of the ways to increase efficiency is the use of means of identifying emergency conditions in sections of both cable and overhead electrical networks. A diagram of the location of damage indicators on the section of the electrical distribution network presented, which allows determining the direction of the search for the location of the damage. A comparative analysis of current measuring transformers of optical and electromagnetic type carried out. It shown that a significant number of advantages of optical measuring current transformers, which can be used in damage indicators, can be provided by measuring current transformers of the electromagnetic type. It is shown that in order to ensure the creation of a damage indicator based on the Smart Grid concept, which allows to reduce the time of searching for the cause and location of an emergency situation to a minimum, as well as to ensure connection to operating overhead and cable lines without removing voltage by connecting the output of the secondary winding of the measuring current transformer of the detachable design to the measuring converters directly placed near the current measuring transformers with the help of a mechanical spring fastener. A block diagram of a specialized information and measurement system with a damage indicator was created, taking into account the requirements of the Smart Grid concept, which allows to reduce the time of searching for the cause to a minimum.
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Vilas, Velhal Geeta, Avani Pujara, S. M. Bakre, and V. Muralidhara. "A diagnosis of fault location system for electrical transmission and distribution network." In 2015 International Conference on Energy Systems and Applications. IEEE, 2015. http://dx.doi.org/10.1109/icesa.2015.7503332.

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Lezhniuk, Petro D., and Kateryna O. Povstianko. "Operational management of the balance of power and electric energy in the electrical power system with renewable energy sources." In 16th IC Measurement and Control in Complex Systems. Vinnytsia: VNTU, 2022. http://dx.doi.org/10.31649/mccs2022.12.

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This work demonstrates the effects of the active use of renewable energy sources (RES) in the unified energy system (UES) of Ukraine, in particular, maintaining the balance in the network for its reliable and high-quality operation. In the energy strategy for the development of renewable energy sources in Ukraine until 2035, a rapid increase of the installed RES capacity is planned, i.e. the task of maintaining balance sheet reliability in the conditions of an increase in the share of RES in the UES of Ukraine is quite urgent. Forecasting of the electricity balance is based on the generation forecast, electricity consumption in a given period of time, as well as fuel reserves and the volume of generating capacity reserves. Renewable energy sources have a non-uniform nature of generation, and therefore endanger aspects of balance reliability. This problem is key for Ukraine in light of the integration of Ukraine's energy system into the European ENTSO-E network. As a result of the conducted research, it can be stated that the improvement of the situation is possible only with an integrated approach and the implementation of appropriate technologies, namely: technical, economic and institutional technologies. The introduction of technologies will make it possible to improve monitoring and management of energy systems; economic implementations will contribute to the reform of retail pricing and taxation of electricity supplies, taking into account the payment they supply for electricity and covering part of the cost of the general infrastructure; institutional innovations will change the functions and responsibilities of management subjects. Improving coordination between transmission and distribution network operators will become a priority.
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Xuereb, R., A. Micallef, C. Spiteri Staines, and J. Licari. "Analysis and optimisation of battery storage systems for mitigation of the effect of PV and EV on the maltese islands electrical network." In 13th Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion (MEDPOWER 2022). Institution of Engineering and Technology, 2022. http://dx.doi.org/10.1049/icp.2023.0051.

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Fauchet, Paul, Muhammad Mansoor Khan, and Hu Tao. "Multi-module DC-DC converter using current-mode control and networked control systems for transmission line." In 2015 IEEE 5th International Conference on Power Engineering, Energy and Electrical Drives (POWERENG). IEEE, 2015. http://dx.doi.org/10.1109/powereng.2015.7266315.

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Mahadik, Rohan R., and Jayant Sirohi. "Harvesting Wind Energy Using a Galloping Piezoelectric Beam." In ASME 2009 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2009. http://dx.doi.org/10.1115/smasis2009-1479.

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Galloping of structures such as transmission line supports and bridges is a classical aeroelastic instability phenomenon that has been looked upon as a harmful and destructive effect. However, there exists potential to harness useful energy from this phenomenon. The study presented in this paper focuses on harvesting wind energy that is being transferred to a galloping beam. The beam has a rigid tip body with a D shaped cross section. Piezoelectric sheets are bonded on the top and bottom surface of beam. During galloping, vibrational motion is input to the system due to aerodynamic forces on the D-section, which is converted into electrical energy by the piezoelectric (PZT) sheets. The significance of various parameters in the system such as wind velocity, material properties of the beam, electrical load and beam natural frequency is discussed. Experimental and analytical investigations of power output are performed on a representative device. A maximum output power of 1.14 mW was measured at a wind velocity of 10.5 mph. A potential application for this device is to power wireless sensor networks on outdoor structures such as bridges and buildings.
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Petrov, Miroslav P., Reza Arghandeh, and Robert Broadwater. "Concept and Application of Distributed Compressed Air Energy Storage Systems Integrated in Utility Networks." In ASME 2013 Power Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/power2013-98113.

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Distributed energy storage has been recognized as a valuable and often indispensable complement to small-scale power generation based on renewable energy sources. Small-scale energy storage positioned at the demand side would open the possibility for enhanced predictability of power output and easier integration of small-scale intermittent generators into functioning electricity markets, as well as offering inherent peak shaving abilities for mitigating contingencies and blackouts, for reducing transmission losses in local networks, profit optimization and generally allowing tighter utility control on renewable energy generation. Distributed energy storage at affordable costs and of low environmental footprint is a necessary prerequisite for the wider deployment of renewable energy and its deeper penetration into local networks. Thermodynamic energy storage in the form of compressed air is an alternative to electrochemical energy storage in batteries and has been evaluated in various studies and tested commercially on a large scale. Distributed compressed air energy storage (DCAES) systems in combination with renewable energy generators installed at residential homes, public or commercial buildings are a viable alternative to large-scale energy storage, moreover promising lower specific investment than batteries if a mass-market is established. Flexible control methods can be applied to DCAES units, resulting in a complex system running either independently for home power supply, or as a unified and centrally controlled utility-scale energy storage entity. This study aims at conceptualizing the plausible distributed compressed-air energy storage units, examining the feasibility for their practical implementation and analyzing their behavior, as well as devising the possible control strategies for optimal utilization of grid-integrated renewable energy sources at small scales. Results show that overall energy storage efficiency of around 70% can be achieved with comparatively simple solutions, offering less technical challenges and lower specific costs than comparable electrical battery systems. Furthermore, smart load management for improving the dispatchability can bring additional benefits by profit optimization and decrease the payback time substantially.
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Morgan, Eric R., and Michael W. Shafer. "Marine Energy Harvesting Using Magnetohydrodynamic Power Generation." In ASME 2014 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/smasis2014-7636.

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Energy harvesting is widely used in terrestrial and aerial sensor applications but is conspicuously absent in the marine environment despite several possible harvesting modalities and numerous applications. One such energy harvesting modality is to use magnetohydrodynamic (MHD) power generators to directly produce electricity from flowing seawater. Fundamentally, MHD generators convert the kinetic energy of a conductive fluid directly into electricity by separating charged particles, thereby generating an electric field transverse to the direction of fluid flow and the magnetic field. The electric field is then accessed with an external circuit to provide power to a load. Since the power output from an MHD generator is linearly related to the conductivity of the flowing fluid and to the square of both the magnetic field strength and the fluid velocity, strong magnets and high fluid velocity are desirable. Thus, there are a myriad of possible MHD generator configurations available to maximize power output under various conditions and constraints. These include configurations of permanent magnets that offer localized high magnetic fields or geometries of the fluid duct that can be used to increase the fluid velocity through the magnetic field. One novel application for MHD generators is to power sensors and bio-loggers used in marine animal telemetry. The animal sensors are designed to take time-series measurements and store the data on the logger for transmission to satellite networks or human retrieval. These sensors and loggers are often battery-limited which constrains either the data fidelity or the longevity, or both. An MHD generator attached to a marine animal can help to supplement some of the sensor or bio-logger power requirements, thereby increasing sensor lifetimes and data fidelity. Thus, MHD generators will enable new research in the marine sciences, climatology, and biology, among others. The MHD generator can be positioned above the fluid boundary-layer so that the fluid flow around the animal is channeled through the MHD generator, producing electricity. In this work, we will develop some of the fundamental equations that describe the physics of an MHD generator and use them to make estimates of the potential power outputs that could be expected from various marine animals. We will also investigate several electrical configurations of the MHD to determine the most suitable MHD generator for different flow regimes. Initial studies suggest that MHD generators are viable power sources in the marine environment and can easily supplement the entire energy budget of a bio-logger under certain conditions.
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Ouellette, Scott, and Michael Todd. "A Systematic Approach to Corrosion-Powered Sensor Network Design." In ASME 2013 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/smasis2013-3191.

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Energy harvesting systems for structural health monitoring applications may be described by three stages: ambient energy transduction, electrical power conditioning, and data acquisition and transmission. Recent developments in low-power CMOS devices have allowed for expanded energy harvesting techniques by reducing the total power demand of sensor nodes. This paper investigates the system-level interaction between a corrosion-based energy harvester and the low-power sensor node to which it is supplying power. An equivalent circuit model of the energy harvester is developed and the matched parameters (source voltage and equivalent series resistance) are used in the design of the power conditioning and wireless transmitter circuitry. Analysis of the power demand from the sensor node is used to determine the optimum data sampling parameters in terms of available supplied power for long-term in-situ sensing operations on a marine structure.
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Ekeinde, Evelyn Bose, Adewale Dosunmu, Diepiriye Chenaboso Okujagu, and Chigozie Agbawodikeizu. "The Nigerian Power Grid and Impediments to Power Revolution in Nigeria." In SPE Nigeria Annual International Conference and Exhibition. SPE, 2022. http://dx.doi.org/10.2118/211931-ms.

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Abstract Electricity availability and adequate and efficient supply mechanisms are a huge driving force for a nation's economy and growth. Energy in all its forms (especially electricity) provide the bedrock through which a nation's industrial and technological advancement takes off and is sustained as processes depend on energy availability and utilization to ensure efficient delivery. The power sector reforms in Nigeria was done to reposition the power sector for increased productivity, but Nigerian power issues, vis-à-vis epileptic supply of electric power still persists. This study takes a look into the impediments to power revolution in the country with emphasis on the nation's power grid. It is seen that impediments like low generation capacities, insufficient transmission and distribution network, lack of adequate gas supply for gas-powered generating plants, insufficient investments in other forms of electricity generation like renewable energy, and improper government regulation still hinder reducing the huge gap between the electrical power needs of the population and the actual power generated and distributed. Recommendations are thereby made for further investigations to check restrictions to power generation and losses along the power transmission and distribution chain as well as improved generation and distribution from other energy sources in the country. Improvements in the transmission and distribution network systems to accommodate more power input is also advised.
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