Results 21 to 30 of about 247 (173)

The Plant Propagation Algorithm for the Optimal Operation of Directional Over-Current Relays in Electrical Engineering

Mehran University Research Journal of Engineering and Technology, 2020
In modern and large scale power distribution topologies, directional relays play an important role in the operation of an electrical system. These relays must be coordinated optimally so that their overall operating time is reduced to a minimum. They are
Muhammad Sulaiman, Muhammad Sulaman, Abdelwahed Hamdi, Zubair Hussain Hussain   +3 more
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

New Overcurrent Relay Coordination Method Through Time Intervals to Enhance Microgrid Protection

IEEE Access, 2021
This paper presents a method to protect microgrids (MGs) through coordination of directional overcurrent relays (DOCRs). The new formulation is subjected to restrictions of pre-established time intervals to guarantee the primary and backup functions of ...
Yendry Gonzalez, Arturo Conde
doaj   +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

A Distribution Line Protection Scheme for Network with Distributed Generation

Jurnal Nasional Teknik Elektro, 2021
Installation of distributed generations (DGs) can cause performance degradation of distribution lines protection. Therefore, the objective of this paper is to propose a protection scheme that can be a solution for this protection line degradation..
Adrianti Adrianti, Edwindiansyah Asharry, Muhammad Nasir   +2 more
doaj   +1 more source

A New Protection Strategy for Microgrid based on Integration of Active Power Index and Fault Current Differential Energy [PDF]

International Journal of Industrial Electronics, Control and Optimization
The utilization of distributed generation (DG) sources in distribution systems has experienced significant growth due to their numerous advantages. Despite benefits such as voltage support and reduced losses, DG integration has introduced substantial ...
Reza Karimi, Abbas Ketabi, Seyyed Mohammad Nobakhti   +2 more
doaj   +1 more source

Optimal Coordination of Directional Overcurrent Relays Using Hybrid Firefly–Genetic Algorithm

Energies, 2023
The application of directional overcurrent relays (DOCRs) plays an important role in protecting power systems and ensuring their safe, reliable, and efficient operation.
Tareq Foqha, Maher Khammash, Samer Alsadi, Osama Omari, Shady S. Refaat, Khaled Al-Qawasmi, Ali Elrashidi   +6 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 coordination of distance relays and non‐standard characteristics for directional overcurrent relays using a modified African vultures optimization algorithm

IET Generation, Transmission & Distribution, 2023
Here, an improved version of an African vultures optimization algorithm (AVOA), known as MAVOA is applied to solve the coordination issue between distance relays and directional overcurrent relays (DOCRs).
Ahmed Korashy, Salah Kamel, Francisco Jurado, Mahdiyeh Eslami   +3 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