Results 21 to 30 of about 224 (167)

Implementation of Optimal Protection Coordination for Microgrids with Distributed Generations Using Quaternary Protection Scheme

Journal of Electrical and Computer Engineering, 2020
The flexible operation of microgrids, along with the availability of distributed generation (DG) units, causes a variety of changes in short-circuit current levels, magnitudes, and directions, which has undesirable effects on the operation of protection ...
Panida Thararak, Peerapol Jirapong
doaj   +1 more source

Optimal Coordination of Directional Overcurrent Relays in Meshed Active Distribution Network Using Imperialistic Competition Algorithm

Journal of Modern Power Systems and Clean Energy, 2021
The optimal setting of directional overcurrent relays (DOCRs) ensures the fault detection and clearing in the minimum possible operation time. Directional protective relaying is carried out to coordinate relay settings in a meshed network in the presence
Pegah Alaee, Turaj Amraee
doaj   +1 more source

Hybrid mixed-integer non-linear programming approach for directional over-current relay coordination

The Journal of Engineering, 2019
This article proposes the optimal coordination problem of protective relays within a hybrid optimisation framework which is presented based on integer coded genetic algorithm (ICGA) and non-linear programming (NLP).
Mohammad Sadegh Javadi, Ali Esmaeel Nezhad, Ali Esmaeel Nezhad, Amjad Anvari-Moghadam, Josep M. Guerrero   +4 more
doaj   +1 more source

Optimal Protection Coordination of Active Distribution Networks Using Smart Selection of Short Circuit Voltage-Based Relay Characteristics

Energies, 2023
Much attention has been paid to the optimized protection of microgrids (MGs) and active distribution networks (ADNs). However, the literature shows a research gap in proposing a hybrid scheme, utilizing the voltage-based and overcurrent-based relays ...
Ali Vafadar, Maryam A. Hejazi, Hamed Hashemi-Dezaki, Negin Mohagheghi   +3 more
doaj   +1 more source

A Novel Protection Scheme for Solar Photovoltaic Generator Connected Networks Using Hybrid Harmony Search Algorithm-Bollinger Bands Approach

Energies, 2020
This paper introduces a new protection system for solar photovoltaic generator (SPVG)-connected networks. The system is a combination of voltage-restrained overcurrent relays (VROCRs) and directional overcurrent relays (DOCRs).
Vipul N. Rajput, Kartik S. Pandya, Junhee Hong, Zong Woo Geem   +3 more
doaj   +1 more source

Busbar Fault Direction Identification Using Sequences of Displacement Vectors

Engineering Reports, Volume 8, Issue 2, February 2026.
In this paper, a novel busbar fault direction identification scheme is presented. The proposed scheme is based on sequences of displacement vectors. The proposed algorithm is fast and simple enough to be embedded in a differential relay to assist the percentage‐restraint differential algorithm.
Mostafa Sarlak
wiley   +1 more source

Optimal protection coordination for directional overcurrent relays in radial distribution networks with inverter-based distributed energy resources

International Journal of Electrical Power & Energy Systems
The optimal setting of directional overcurrent relays ensures the reliable protection and fast fault clearance of radial distribution networks. However, the increasing proliferation of inverter-based distributed energy resources can result in protection ...
Jie Li, Jingtong Feng, Min Huang, Shenquan Liu, Gang Wang   +4 more
doaj   +1 more source

Advanced Clustering and Optimisation Techniques for Adaptive Protection in AC Microgrids With Hardware‐in‐the‐Loop Testing

Energy Science &Engineering, Volume 14, Issue 1, Page 377-398, January 2026.
Standard and proposed non‐standard OCR characteristics. ABSTRACT This study introduces an advanced adaptive protection approach for AC power systems, designed to address key limitations in current clustering‐based relay coordination methods. Using K‐means, hierarchical, and spectral clustering techniques, the proposed scheme classifies grid operating ...
Feras Alasali, Naser El‐Naily, Mohamed Salem, Hassen Loukil, Haytham Y. Mustafa, Abdelaziz Salah Saidi, William Holderbaum   +6 more
wiley   +1 more source

Adaptive Protection Coordination for Microgrids Using Dual‐Setting Directional Overcurrent Relays: A Real‐Time HIL Validation Approach

IET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
This research presents a robust protection coordination strategy using dual‐setting directional overcurrent relays (DS‐DOCRs) and a novel optimisation approach to address challenges in adaptive protection. A modified objective function, incorporating primary and backup relay operating times along with coordination time intervals (CTIs), is designed to ...
Oussama Merabet, Aissa Kheldoun, Aidil Azwin Zainul Abidin, Saad Mekhilef, Nima Khosravi   +4 more
wiley   +1 more source

Distance optimization and directional overcurrent relay coordination using edge-powered biogeography-genetic algorithms

Journal of Cloud Computing: Advances, Systems and Applications
The effective functioning and regulation of power systems crucially rely on the coordination of distance and directional overcurrent relays. Accurate fault detection and successful clearing sequences require support for each relay and the maintenance of ...
Mohammadreza Aminian, Mehdi Jafari Shahbazzadeh, Mahdiyeh Eslami   +2 more
doaj   +1 more source