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A Comprehensive Assessment of Fundamental Overcurrent Relay Operation Optimization Function and Its Constraints

1
Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka, Croatia
2
Croatian Transmission System Operator Ltd., Kupska 4, 10000 Zagreb, Croatia
*
Author to whom correspondence should be addressed.
Academic Editor: Simira Papadopoulou
Energies 2022, 15(4), 1271; https://doi.org/10.3390/en15041271
Received: 4 January 2022 / Revised: 5 February 2022 / Accepted: 8 February 2022 / Published: 9 February 2022
The optimization of overcurrent relays’ operation is a topic associated with protection coordination of distribution networks. Usually, this refers to medium-voltage networks, since they are protected by numerical relay devices, as opposed to low-voltage networks, where utility operators allocate fuses. Correct setting of relays and optimal coordination is becoming a serious challenge to Distribution Network Operators around the world, since their networks’ passive operation has been greatly altered in the past two decades. Distributed generation units, a growing liberalized electricity market and more stringent legislation for distribution network planning and operation by state regulatory bodies have all indirectly affected the evolving of protection philosophy for distribution networks. In this paper the traditional optimization problem of overcurrent relay operation will be addressed and critically examined from both a theoretical and practical point of view. Optimization function, constraints and relay parameters will all be observed and compared with solutions used in distribution networks, and their modifications and improvements will be proposed and elaborated in detail. View Full-Text
Keywords: overcurrent relays; protection optimization; plug settings; time multiplier settings; coordination time interval overcurrent relays; protection optimization; plug settings; time multiplier settings; coordination time interval
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MDPI and ACS Style

Rojnić, M.; Prenc, R.; Bulat, H.; Franković, D. A Comprehensive Assessment of Fundamental Overcurrent Relay Operation Optimization Function and Its Constraints. Energies 2022, 15, 1271. https://doi.org/10.3390/en15041271

AMA Style

Rojnić M, Prenc R, Bulat H, Franković D. A Comprehensive Assessment of Fundamental Overcurrent Relay Operation Optimization Function and Its Constraints. Energies. 2022; 15(4):1271. https://doi.org/10.3390/en15041271

Chicago/Turabian Style

Rojnić, Michele, Rene Prenc, Hrvoje Bulat, and Dubravko Franković. 2022. "A Comprehensive Assessment of Fundamental Overcurrent Relay Operation Optimization Function and Its Constraints" Energies 15, no. 4: 1271. https://doi.org/10.3390/en15041271

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