Academic literature on the topic 'Protective relays'

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Journal articles on the topic "Protective relays"

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Jurnal, Redaksi Tim. "STUDI METODE PENGGANTIAN RELAI MEKANIS MENJADI ELEKTRIS PANEL TEGANGAN MENENGAH PLTU UNIT 4 MUARA KARANG." Energi & Kelistrikan 9, no. 2 (2018): 157–67. http://dx.doi.org/10.33322/energi.v9i2.47.

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Protective Relay is a device that provides alarm and trip / open signals to circuit breakers due to interference with protected equipment. Replacement of protection relay at the switchgear location of PLTU unit 4 Muara karang has been planned since 2010 and realized in December 2016 this coincides with Over Houl Mean Inspection. There are several problems encountered in the replacement of switchgear protection relays. The problem faced in performing this switchgear protective relay replacement is on mechanical relays that are replaced into electrical relays requiring many modifications and wor
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Gurevich, Vladimir. "Hybrid reed: Solid-state devices are a new generation of protective relays." Serbian Journal of Electrical Engineering 4, no. 1 (2007): 85–94. http://dx.doi.org/10.2298/sjee0701085g.

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Research and development in the field of electromechanical protective relays has not been conducted for tens of years. Author?s approach allows viewing the problem of re-equipment of relay protection in a new way. In the author?s opinion combination of reed switches with magnetic circuits and semiconductor elements opens new avenues in development of the promising protective relays featuring reliability, simplicity and low cost. Examples of protective relays made with these elements are given below.
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Ch Srihari Varma, T Rama Subba Reddy та Ch Sai Babu. "Evolution of protective relays in 1-Φ, 25kV, 50Hz railway traction system". International Journal of Engineering Research Updates 2, № 1 (2022): 039–50. http://dx.doi.org/10.53430/ijeru.2022.2.1.0029.

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This paper presents the evolution of protective relays used for the protection of Power Transformer, Over Head Equipment (OHE) and Shunt Capacitor Bank in Indian Railways Electrical Distribution Systems. Initially during electrification Indian Railways adopted 1-Φ, 25KV, 50Hz AC system and electromagnetic relays (EM Relays) for feeder protection of OHE available at that time. But over the period of time with the drastic growth in traffic and sharp increase in demand for more electrical power to heavy goods trains haulage, the above said protective system doesn’t catered the requirements like s
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Mohideen, H., and Merlin I. Anita. "Modern numerical relays in protection of power transformer." i-manager's Journal on Power Systems Engineering 11, no. 4 (2024): 39. http://dx.doi.org/10.26634/jps.11.4.20841.

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This paper presents various protection schemes and their respective modern numerical protection relays to protect the power transformer. Proper protection is needed for the economical and safe operation of electrical power systems. The power transformer protective relay should block the tripping during an external fault or magnetizing inrush and speedily operate the tripping during internal faults. The objective of this paper is to implement protection during in-zone and outzone faults and to operate the relay with proper selective discrimination. The basic approach is to disconnect the power
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Zorin, Yevhenii, and Oleksandr Chepelіuk. "Improvement of microprocessor voltage control relay operation algorithms for single-phase household consumers." Bulletin of NTU "KhPI". Series: Problems of Electrical Machines and Apparatus Perfection. The Theory and Practice, no. 1 (9) (June 16, 2023): 11–20. http://dx.doi.org/10.20998/2079-3944.2023.1.02.

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This paper pays attention to a single-phase voltage control relays work algorithms that are used for protection of the household consumers of electrical energy from unacceptable voltage deviations within power supply network. An overview, analysis and description of operation algorithms, voltage measurements and thresholds of current voltage control relays, based on microprocessors and microcontrollers have been carried out. The conducted overview and analysis systematizes information on the technical and functional features of the operational design, work algorithms, circuits and components o
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Chang, Choong-Koo, and Ahmed Mohamed Elmashtoly. "Protection Coordination Index Assessment Using Fuzzy Logic Controller." Energies 15, no. 4 (2022): 1377. http://dx.doi.org/10.3390/en15041377.

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This paper proposes the assessment method of the protection coordination index (PCI) for overcurrent protection relay and upstream relay. The protection coordination index is an indicator of how properly the equipment is protected by protective relay. The PCI is used to check the appropriateness of the protection coordination for both the component-wise and pair-wise. The protection index of each protection component of the integrated digital relay is assessed by a fuzzy logic controller. Then the device-level protection index and the composite protection coordination index between up and down
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Kamble, Vijaykumar S., Prabodh Khampariya, and Amol A. Kalage. "A Survey on the Development of Real-Time Overcurrent Relay Coordination Using an Optimization Algorithm." NeuroQuantology 20, no. 5 (2022): 74–85. http://dx.doi.org/10.14704/nq.2022.20.5.nq22150.

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The current work is a survey on the development of real-time overcurrent relay coordination utilizing an optimization approach. Overcurrent relays are a safeguard commonly used in transmission and distribution networks owing to their low cost. Depending on the operating conditions and the location of the faults, load or fault currents in a mesh system may loop in or out of the protective zone of the overcurrent relay. As a result, directional overcurrent relays are employed to determine whether the fault is inside or outside the protective zone. The goal of overcurrent relay coordination is to
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Gurevich, Vladimir. "Susceptibility of modern relay protection: Will protection from cyber attacks help?" Serbian Journal of Electrical Engineering 11, no. 2 (2014): 233–41. http://dx.doi.org/10.2298/sjee131026019g.

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Modern trends in relay protection (RP) based on the substitution of electromechanical protection relays (EMPR) by digital protective relays (DPR) have resulted in the emergence of an absolutely new problem, which was not known before. This problem is the possibility of an intentional remote destructive impact (IRDI) on relay protection in order to put it out of action or make it perform functions that have nothing to do with the current operational mode of protected electric equipment. Traditional and well-known methods ensuring information safety cannot fully prevent unauthorized actions of R
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Kim, Joorak, Gyu-Jung Cho, and Jaewon Kim. "Development of Railway Protective Relay Simulator for Real-Time Applications." Applied Sciences 10, no. 1 (2019): 191. http://dx.doi.org/10.3390/app10010191.

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Electric railways use a single-phase system, with the line comprising a trolley wire (TF) that supplies power to the load with a neutral wire and an autotransformer (AF) feeder to absorb the return current of the rail. Testing the performance of the protective relay that detects the fault of the traction power-supply system (TPSS) and operates the circuit breaker is very important. Until now, the performance test of protective relays for the TPSS has been conducted via a simple-steady test or using an expensive real-time simulator. However, under a fast-moving environment in which the load con
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Yadav, Gaurav, Yuan Liao, and Austin D. Burfield. "Hardware-in-the-Loop Testing for Protective Relays Using Real Time Digital Simulator (RTDS)." Energies 16, no. 3 (2023): 1039. http://dx.doi.org/10.3390/en16031039.

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With the increasing size and complexity of power systems, it is crucial to have an effective protection system in place to ensure its reliability. One of the important components of the protection system are relays. It is important for a relay to operate dependably and securely so that any fault can be cleared in time to minimize damages to the power network. However, it is important to test a relay in a realistic environment before commissioning it to the network. Testing a relay in the actual network can be expensive with limited fault scenarios. Hence, Hardware-in-the-Loop (HIL) testing is
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Dissertations / Theses on the topic "Protective relays"

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DUQUE, CARLOS AUGUSTO. "TESTS OF PROTECTIVE RELAYS UNDER TRANSIENT REGIME." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1990. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=14090@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>Testes de relés de proteção têm assumido maior importância como resultado dos avanços tecnológicos. Novos relés podem ser projetados para atuarem rápido, sendo particularmente sensíveis a parte transitória da falta que eles supostamente detetam. Procedimentos usuais para testes de relés utilizam arquivos obtidos durante testes de falta, ou através de programas de simulação como o EMTP. Entretanto é muito difícil caracterizar um conjunto de formas de onda como suficiente para t
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Hunt, Richard K. "Hidden Failure in Protective Relays: Supervision and Control." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36571.

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This thesis performs simulations of a relay supervisory system (RSS) that works passively in conjunction with the existing protective relaying system at a substation. During normal system operating conditions, the RSS supervises the relay system to prevent trips due to hidden failures. During wide area network disturbances, it adapts the relay system to increase security of the power system. The RSS works passively in the sense that it waits for events to occur in the existing relay system before taking any action. The simulation performed includes a model of the RSS, along with simplified
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Harris, Raymond Trevor. "Replacement of seven 132/66 kv distance protection schemes by means of a generic relay implemented as a strategic spare." Thesis, Port Elizabeth Technikon, 2000. http://hdl.handle.net/10948/34.

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Eskom is experiencing problems in the field of protection maintenance and in-service breakdowns which negatively influence the quality of electrical supply to the consumer, an integral component of the utility business. These facts initiated the research into the further development of a generic relay to be implemented as a strategic spare for the replacement of several schemes operating within Eskom’s southern region. These include the electromechanical, solid state and numerical distance protection relay and scheme failures on the 132 / 66 kV feeder network. Hence, the primary objective of t
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Qadri, Syed Saadat. "A systematic approach to setting underfrequency relays in electric power systems /." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=116022.

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Generation loss contingencies in electric power systems result in a deviation of system frequency from nominal, a condition which must be corrected promptly in order to prevent further degradation of the power system. Automatic load-shedding using underfrequency relays is one of the techniques used to correct abnormal frequency deviations and prevent the risk of uncontrolled outages. If sufficient load is shed following a contingency to preserve interconnections and keep generators on-line, the system can be restored with relative speed and ease. On the other hand, if a declining frequency con
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Ristanovic, Dragan. "New methodology for transmission line relay testing and evaluation using advanced tools." Texas A&M University, 2003. http://hdl.handle.net/1969.1/355.

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Protective relays are important parts of the power system. The protection guards valuable equipment, and protective relays play a vital role in performing the task. The relay detects fault conditions within an assigned area, opens and closes output contacts to cause the operation of other devices under its control. The relay acts to operate the appropriate circuit breakers to prevent damage to personnel and property. To ensure consistent reliability and proper operation, protective relay equipment must be evaluated and tested. The importance of the relay evaluation issue is linked to capabili
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Liang, Feng. "Performance enhancement of digital relays for transmission line distance protection /." Internet access available to MUN users only, 2003. http://collections.mun.ca/u?/theses,153681.

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Mohammadi, Houshang C. "Short-circuit current calculations and protective relay coordination for industrial and commercial power systems." Ohio : Ohio University, 1986. http://www.ohiolink.edu/etd/view.cgi?ohiou1183141301.

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Zahra, Fathima. "Artificial neural network approach to transmission line relaying." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0001/MQ42465.pdf.

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Xu, Ran. "Loss of field protection and its impact on power system stability." Pullman, Wash. : Washington State University, 2009. http://www.dissertations.wsu.edu/Thesis/Fall2009/r_xu_120109.pdf.

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Thesis (M.S. in electrical engineering)--Washington State University, December 2009.<br>Title from PDF title page (viewed on Jan. 28, 2010). "School of Electrical Engineering and Computer Science." Includes bibliographical references (p. 99-101).
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Patel, Daxe. "Modeling and testing of an instantaneous overcurrent relay using VTB and VTB-RT." Master's thesis, Mississippi State : Mississippi State University, 2006. http://sun.library.msstate.edu/ETD-db/ETD-browse/browse.

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Books on the topic "Protective relays"

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Measurements, GEC, ed. Protective relays: Application guide. 3rd ed. GEC Measurements, 1987.

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(Firm), ALSTOM. Network protection & automation guide: Protective relays, measurement & control. Alstom Grid, 2011.

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Sleva, Anthony F. Protective relay principles. CRC Press, 2009.

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Gurevich, Vladimir. Digital protective relays: Problems and solutions. CRC Press, 2011.

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Board, IEEE Standards, ed. Protective relaying systems. Institute of Electrical and Electronics Engineers, 1995.

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IEEE Power Engineering Society. Power Engineering Education Committee. and IEEE Power Engineering Society. Power Systems Relaying Committee., eds. Microprocessor relays and protection systems. IEEE, 1987.

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J, Domin Thomas, ed. Protective relaying: Principles and applications. 3rd ed. CRC Press, 2007.

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Blackburn, J. Lewis. Protective relaying: Principles and applications. M. Dekker, 1987.

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1925-, Elmore Walter A., ed. Protective relaying theory and applications. ABB, 1994.

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P, Singh L. Digital protection: Protective relaying from electromechanical to microprocessor. Wiley, 1994.

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Book chapters on the topic "Protective relays"

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Abood, Samir I., and John Fuller. "Protective Relays." In Power System Protection and Relaying. CRC Press, 2023. http://dx.doi.org/10.1201/9781003394389-2.

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Rebizant, Waldemar, Janusz Szafran, and Andrzej Wiszniewski. "Decision Making in Protective Relays." In Signals and Communication Technology. Springer London, 2011. http://dx.doi.org/10.1007/978-0-85729-802-7_10.

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Kezunovic, Mladen, Jinfeng Ren, and Saeed Lotfifard. "Testing of Digital Protective Relays." In Design, Modeling and Evaluation of Protective Relays for Power Systems. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-20919-7_8.

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Rebizant, Waldemar, Janusz Szafran, and Andrzej Wiszniewski. "Elements of Fuzzy Logic in Protective Relays." In Signals and Communication Technology. Springer London, 2011. http://dx.doi.org/10.1007/978-0-85729-802-7_11.

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Ibrahim, Nagwa F., Sobhy S. Dessouky, Hossam E. Mostafa Attia, and Ali H. Kasem Alaboudy. "Transient Behavior of Induction Generator Protective Relays." In Protection of Wind Turbine Generators Using Microcontroller-Based Applications. Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92628-1_4.

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Kezunovic, Mladen, Jinfeng Ren, and Saeed Lotfifard. "Basics of Protective Relaying and Design Principles." In Design, Modeling and Evaluation of Protective Relays for Power Systems. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-20919-7_3.

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Khurram, Adil, Haider Ali, Arham Tariq, and Osman Hasan. "Formal Reliability Analysis of Protective Relays in Power Distribution Systems." In Formal Methods for Industrial Critical Systems. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-41010-9_12.

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Kezunovic, Mladen, Jinfeng Ren, and Saeed Lotfifard. "Introduction." In Design, Modeling and Evaluation of Protective Relays for Power Systems. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-20919-7_1.

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Kezunovic, Mladen, Jinfeng Ren, and Saeed Lotfifard. "Power System Fault Analysis and Short-Circuit Computations." In Design, Modeling and Evaluation of Protective Relays for Power Systems. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-20919-7_2.

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Kezunovic, Mladen, Jinfeng Ren, and Saeed Lotfifard. "Modeling of Digital Relay and Power System Signals." In Design, Modeling and Evaluation of Protective Relays for Power Systems. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-20919-7_4.

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Conference papers on the topic "Protective relays"

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"Relay scheme design using microprocessor relays." In 2015 68th Annual Conference for Protective Relay Engineers. IEEE, 2015. http://dx.doi.org/10.1109/cpre.2015.7102183.

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Kokorin, Evgenii L., and Stepan A. Dmitriev. "Maintenance of protective relays." In 2017 IEEE 58th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON). IEEE, 2017. http://dx.doi.org/10.1109/rtucon.2017.8124768.

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Nair, D. S., and S. Reshma. "Optimal coordination of protective relays." In 2013 International Conference on Power, Energy and Control (ICPEC). IEEE, 2013. http://dx.doi.org/10.1109/icpec.2013.6527658.

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Chano, S. R., D. Miller, J. Afonso, et al. "Ancillary Protective and Control Functions Common to Multiple Protective Relays." In 2011 64th Annual Conference for Protective Relay Engineers. IEEE, 2011. http://dx.doi.org/10.1109/cpre.2011.6035640.

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Skendzic, Veselin, and Bob Hughes. "Using Rogowski coils inside protective relays." In 2013 66th Annual Conference for Protective Relay Engineers. IEEE, 2013. http://dx.doi.org/10.1109/cpre.2013.6822022.

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Edwards, William, and Scott Manson. "Using protective relays for microgrid controls." In 2018 71st Annual Conference for Protective Relay Engineers (CPRE). IEEE, 2018. http://dx.doi.org/10.1109/cpre.2018.8349834.

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Turner, Steve. "Testing numerical transformer differential relays." In 2011 64th Annual Conference for Protective Relay Engineers. IEEE, 2011. http://dx.doi.org/10.1109/cpre.2011.6035627.

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Banpurkar, Utkarsha S., and P. S. Shete. "Coordination of protective relays for the protection of micro-grid." In 2016 International Conference on Energy Efficient Technologies for Sustainability (ICEETS). IEEE, 2016. http://dx.doi.org/10.1109/iceets.2016.7583796.

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V. Lopes, Felipe, Jônatas S. Costa, Tiago R. Honorato, et al. "Transmission Line Protection Performance in the Presence of Wind Power Plants: Study on the Busbar Capacitance Modeling During Relay Testing Procedures." In Simpósio Brasileiro de Sistemas Elétricos - SBSE2020. sbabra, 2020. http://dx.doi.org/10.48011/sbse.v1i1.2184.

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In this paper, the performance of transmission line differential and distance protection functions available in phasor- and time-domain-based relays is evaluated considering the presence of wind power plants. In the proposed study, an investigation on the system busbar capacitance modeling during relay testing procedures is carried out, indicating differences verified in the number of operations and operation times of four real protective relays. The obtained results reveal that the busbar capacitance modeling is critical for some protection functions, affecting mainly the reliability of trans
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Chapariha, Mehrdad, Mohamed Maria, Saman Alaeddini, Miguel A. Vazquez, Arthur Giourdjian, and Gurinder Gill. "Process Improvement of Distribution Protective Relays Coordination." In 2021 74th Conference for Protective Relay Engineers (CPRE). IEEE, 2021. http://dx.doi.org/10.1109/cpre48231.2021.9429838.

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Reports on the topic "Protective relays"

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Reno, Matthew, and Logan Blakely. AI-Based Protective Relays for Electric Grid Resiliency. Office of Scientific and Technical Information (OSTI), 2022. http://dx.doi.org/10.2172/1844320.

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McDermott, Thomas E., Jeffrey D. Doty, James G. O'Brien, Crystal R. Eppinger, and Tamara Becejac. Cybersecurity for Distance Relay Protection. Office of Scientific and Technical Information (OSTI), 2020. http://dx.doi.org/10.2172/1602545.

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Baughman, Alfred, Tyler Bowman, Ross Guttromson, et al. HEMP Testing of Substation Yard Circuit Breaker Control and Protective Relay Circuits. Office of Scientific and Technical Information (OSTI), 2020. http://dx.doi.org/10.2172/1669208.

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Muenz, Ulrich, Siddharth Bhela, Nan Xue, et al. Protection of 100% Inverter-dominated Power Systems with Grid-Forming Inverters and Protection Relays – Gap Analysis and Expert Interviews. Office of Scientific and Technical Information (OSTI), 2024. http://dx.doi.org/10.2172/2429968.

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Burkes, Klaehn, and Ian Webb. Effect of GPS Manipulation to Traditional and Next Generation Relay Protection. Office of Scientific and Technical Information (OSTI), 2020. http://dx.doi.org/10.2172/1651101.

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Shah, Payal. Forest protection relies on more than just protected areas. Edited by Sara Phillips. Monash University, 2022. http://dx.doi.org/10.54377/71df-f7f0.

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Meliopoulos, Sakis, George Cokkinedes, and Kaiyu Liu. Estimation Based Protection Relay-Application to Distribution System with High DER Penetration. Office of Scientific and Technical Information (OSTI), 2021. http://dx.doi.org/10.2172/1996378.

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BURKES, KLAEHN, and IAN WEBB. EFFECT OF GPS MANIPULATION TO TRADITIONAL AND NEXT GENERATION RELAY PROTECTION FINAL REPORT. Office of Scientific and Technical Information (OSTI), 2021. http://dx.doi.org/10.2172/1827959.

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Hossain-McKenzie, Shamina, Nicholas Jacobs, Adam Summers, et al. Harmonized Automatic Relay Mitigation of Nefarious Intentional Events (HARMONIE) - Special Protection Scheme (SPS). Office of Scientific and Technical Information (OSTI), 2022. http://dx.doi.org/10.2172/1890265.

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Lind, Jeremy, Carolina Holland-Szyp, Rachel Sabates-Wheeler, Yihunbelay Teshome, and Lars Otto Naess. Can Social Protection Programmes Promote Livelihoods and Climate ‍Resilience in Conflict‑Affected Settings? Evidence from Ethiopia’s Productive Safety Net Programme. Institute of Development Studies, 2025. https://doi.org/10.19088/basic.2025.006.

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The paper discusses the growing interest in using social protection to address climate-related vulnerabilities and strengthen resilience, particularly in conflict-affected settings. It examines the Productive Safety Net Programme in Ethiopia, highlighting that while social assistance offers a protective function, it falls short of reducing long-term vulnerabilities, especially in settings characterised by multidimensional and enduring stressors and shocks. The assistance provided is often inadequate, leaving recipients to rely on their own resources. The paper emphasises that improving livelih
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