Results 51 to 60 of about 2,500 (192)
Energies, 2021 A directional overcurrent relay is commonly used to protect the power distribution networks of a distributed system. The selection of the appropriate settings for the relays is an important component of the protection strategies used to isolate the ...
Aayush Shrivastava +4 more
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Robust coordination of directional overcurrent relays using a matheuristic algorithm
IET Generation, Transmission & Distribution, 2017 Directional overcurrent relays are often used in the protection of electrical power transmission and distribution systems. These devices are installed along the network, and they must be coordinated to operate as fast as possible and in the adequate sequence.
Mateus H. Costa +3 more
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IET Renewable Power Generation, Volume 20, Issue 1, January/December 2026.This paper proposes a novel mesh‐type medium‐voltage distribution network topology enabled by soft open points (SOPs) to achieve system‐wide continuous power flow regulation and overcome the limitations of conventional radial architectures. To ensure efficient integration, a multi‐objective stochastic planning model and a three‐tiered control strategy ...
Chen Guo +4 more
wiley +1 more source
Optimal coordination of overcurrent relays for microgrid operation using JAYA algorithm
e-Prime: Advances in Electrical Engineering, Electronics and EnergyIn modern microgrids, relay coordination is a very tedious task because of the variation in magnitude and direction of fault current. The change in fault current is diverse for inverter interfaced DGs (IIDGs) and synchronous-based DGs (SBDGs) The ...
Naveen Kumar, Dinesh Kumar Jain
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Decentralised Zone‐Based Protection of Radial Smart Grids Using a Multi‐Agent Scheme
IET Smart Grid, Volume 9, Issue 1, January/December 2026.A decentralised zone‐based protection is proposed where a multi‐agent scheme is used to manage faults using local agents assigned to each zone of smart grids. ABSTRACT This paper proposes a multi‐agent, zone‐based protection scheme for modern radial smart distribution grids with high penetration of Distributed Energy Resources (DERs).
Hamed Rezapour +3 more
wiley +1 more source
Journal of Applied Mathematics, 2013 In power systems, determining the values of time dial setting (TDS) and the plug setting (PS) for directional overcurrent relays (DOCRs) is an extremely constrained optimization problem that has been previously described and solved as a nonlinear ...
Ming-Ta Yang, An Liu
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Energies, 2019 In power systems protection, the optimal coordination of directional overcurrent relays (DOCRs) is of paramount importance. The coordination of DOCRs in a multi-loop power system is formulated as an optimization problem.
Abdul Wadood +5 more
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Directional Overcurrent Relays Coordination Problems in Distributed Generation Systems [PDF]
Energies, 2017 This paper proposes a new approach to the distributed generation system protection coordination based on directional overcurrent protections with inverse-time characteristics. The key question of protection coordination is the determination of correct values of all inverse-time characteristics coefficients.
Jakub Ehrenberger, Jan Švec
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International Journal of Energy Research, Volume 2026, Issue 1, 2026.This paper presents a new two‐stage protection strategy for active distribution networks that not only addresses selectivity constraints along protected lines but also incorporates fault‐ride‐through (FRT) requirements of inverter‐based distributed energy resources (IBDERs). The proposed coordination strategy (PCS), which distinguishes it from previous
Amin Yazdaninejadi +4 more
wiley +1 more source
Gazi Üniversitesi Fen Bilimleri DergisiDirectional overcurrent relays (DOCRs) play a crucial role in protecting sub-transmission and distribution systems due to their simplicity and cost- ffectiveness. For selective and rapid protection, proper coordination of these relays is essential.
Alişan Ayvaz
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