Results 61 to 70 of about 1,041,598 (189)

Optimal Coordination of Directional Overcurrent Relays Using an Exponential-Based Non-Standard Characteristic and the Nutcracker Optimizer

Gazi Üniversitesi Fen Bilimleri Dergisi
Directional 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
doaj   +1 more source

Nature-Inspired Whale Optimization Algorithm for Optimal Coordination of Directional Overcurrent Relays in Power Systems

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, Tahir Khurshaid, Saeid Gholami Farkoush, Jiangtao Yu, Chang-Hwan Kim, Sang-Bong Rhee   +5 more
doaj   +1 more source

Comprehensive Study of DC Microgrids Protection: Challenges, Cutting‐Edge Techniques, Machine‐Learning‐Driven Solutions

IET Renewable Power Generation, Volume 20, Issue 1, January/December 2026.
ABSTRACT This paper provides a comprehensive examination of the evolving protection challenges within DC microgrids powered by renewable resources and energy storage systems. It begins by delineating the methodological framework of conventional protection, critically assessing schemes based on current, voltage, and impedance to expose their limitations
Mohamed Elmadawy, Ahmed Shahin, Abdelhady Ghanem, Almoataz Y. Abdelaziz, Fujin Deng, Ahmad S. Ayub, Abdalbaset Mnider, Sayed Abulanwar   +7 more
wiley   +1 more source

Coordination of Overcurrent, Directional and Differential Relays for the Protection of Microgrid System [PDF]

, 2013
Microgrid implementation draws new challenges especially in the coordination of protective devices that are not likely to appear in a traditional distribution network.
Mohamed, Azah, Haron, Ahmad Razani, Shareef, Hussain   +2 more
core   +1 more source

A Novel Mesh‐Type Medium‐Voltage Distribution Network Topology Enabled by Soft Open Points: Architecture Variants, Capability Analysis, and Operational Strategy

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, Honggang Jia, Jian Zeng, Zhiqi Zhang, Xingxing Zhou   +4 more
wiley   +1 more source

Modified Swarm-Based Artificial Intelligence Optimization for Optimal Coordination of Directional Overcurrent Relays in Power System

IEEE Access
The coordination of directional overcurrent relays (DOCRs) plays a critical role in ensuring the reliability and robustness of modern electrical power protection systems.
Abdul Wadood, Hani Albalawi, Aadel Mohammed Alatwi, Herie Park   +3 more
doaj   +1 more source

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, Sadegh Jamali, Pierluigi Siano, Josep M. Guerrero   +3 more
wiley   +1 more source

Optimal Coordination of Distance and Directional Overcurrent Relays Considering Different Network Topologies

Iranian Journal of Electrical and Electronic Engineering, 2015
Most studies in relay coordination have focused solely on coordination of overcurrent relays while distance relays are used as the main protection of transmission lines.
Y. Damchi, J. Sadeh, H. Rajabi Mashhadi
doaj  

Assessment of an Overcurrent Protection Strategy Based on Thermal Stress Curves in Distribution Networks Under Reconfiguration Scenarios

IEEE Access
Network 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, Rene Prenc, Vedran Kirincic, Milos Bekovic   +3 more
doaj   +1 more source

Optimal Linear Protection Scheme of Inverter‐Based Distributed Energy Resources: Meeting Fault‐Ride‐Through Requirement

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, Hossein Ebrahimi, Sajjad Golshannavaz, Zhiyi Li, Rajashik Paul   +4 more
wiley   +1 more source