Results 31 to 40 of about 182 (135)
Optimization Techniques for Directional Overcurrent Relay Coordination: A Comprehensive Review
IEEE AccessThis paper provides a comprehensive review of optimization techniques for coordinating directional overcurrent relays in power systems. It covers a wide range of techniques, including conventional and deterministic methods, metaheuristic algorithms, and ...
Tareq Foqha +3 more
doaj +1 more source
IEEE Access, 2022 Recently, numerical relays with communication capabilities have been employed to provide adaptive solutions for Distributed Generations (DGs) protection issues.
Alaa Hmam El-Hamrawy +2 more
doaj +1 more source
IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.A multi‐source data collaborative fault section identification method for high fault‐tolerant distribution networks is proposed. The method constructs a robust mixed‐integer linear programming cooperative model by integrating zero‐sequence current direction features and fault indicator alarm signals.
Wangqing Mao +5 more
wiley +1 more source
Harmonic Dual-Setting Directional Overcurrent Protection for Inverter-Based Islanded Microgrids
IEEE Access, 2023 Limited fault currents in inverter-interfaced islanded microgrids impose immense challenges on conventional overcurrent protection schemes. This paper proposes a sensitive and selective protection scheme for islanded microgrids using a third harmonic ...
Talal Elemamali Sati +2 more
doaj +1 more source
IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.This paper proposes a closed‐form analytical framework predicting the sub‐cycle transient peak currents of grid‐following and grid‐forming inverters during short‐circuit faults. The method uniquely decouples the fault current into a hardware natural response and a control‐commanded response, enabling rapid estimation of instantaneous initial peaks ...
Ziqian Zhang, Robert Schuerhuber
wiley +1 more source
Optimal Coordination Of Distance And Directional Overcurrent Relays Using GA [PDF]
مجله مدل سازی در مهندسی, 2017 Proper coordination between distance relays and overcurrent in the power system is one of the most important issues for security and stability of system.
زهرا مروج +2 more
doaj +1 more source
IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.This paper maps key 5G technology enablers, such as carrier aggregation, dual connectivity, and network slicing (NS), to IEC 61850 smart grid communication traffic types and experimentally evaluates their performance in commercial 5G networks. Results show that NS enhances reliability for grid protection and automation but still falls short of ultra ...
Petra Raussi +5 more
wiley +1 more source
IEEE AccessNetwork reconfiguration enables the restoration of power supply in interrupted areas after faults or planned maintenance events. However, changes in network topology can often lead to alteration in the direction and magnitude of fault currents ...
Michele Rojnic +3 more
doaj +1 more source
Complexity, 2018 This paper presents the solution of directional overcurrent relay (DOCR) problems using Simulated Annealing based Symbiotic Organism Search (SASOS). The objective function of the problem is to minimize the sum of the operating times of all primary relays.
Muhammad Sulaiman +3 more
doaj +1 more source
IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.This paper proposes a physics‐informed graph reinforcement learning (PI‐GRL) framework that combines graph neural networks (GNNs) with deep reinforcement learning and physics‐based regularization for unified HC maximization. The distribution network is modelled as a heterogeneous graph with typed nodes and edges, processed by a multi‐relational GNN ...
Aamir Nawaz +4 more
wiley +1 more source