Results 61 to 70 of about 247 (173)
Impacts of grid‐forming inverters on distance protection
IET Generation, Transmission &Distribution, Volume 19, Issue 1, January/December 2025.This paper investigates the impacts of grid‐forming (GFM) inverters on distance protection, with the main objective of providing an improved understanding of the topic. Important interoperability issues are highlighted with simulation results and elaborated upon based on the theory behind the distance relay model and the behaviours of GFM inverters ...
Henrik Johansson +3 more
wiley +1 more source
Coordination of Directional Overcurrent Relays using Growth Optimizer
Electrotehnica, Electronica, AutomaticaThe protection system plays a crucial role in the generation, transmission, and distribution systems of a power network. Among various protection relay types, Directional Overcurrent Relays (DOCRs) are the most used. When abnormal conditions are detected, these relays trigger the tripping of protection devices by detecting the direction and magnitude ...
Ridha Djamel MOHAMMED +2 more
openaire +1 more source
Energies, 2019 Distributed, generation-based micro-grids are increasingly being used in the build-up of the modern power system. However, the protection of these micro-grids has many challenges.
Mahmoud Abdelsalam, Hatem Y. Diab
doaj +1 more source
Optimal Coordination of Directional Overcurrent Relays (DOCR) Using Cheetah Optimizer
Tikrit Journal of Engineering SciencesThis paper suggests a nature-inspired optimization technique, the Cheetah Optimizer (CO), to achieve optimal Directional Overcurrent Relays (DOCRs) coordination.
Wisam Najm Al-Din Abed
doaj +1 more source
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
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 +4 more
doaj +1 more source
Improved Solutions for the Optimal Coordination of DOCRs Using Firefly Algorithm
Complexity, 2018 Nature-inspired optimization techniques are useful tools in electrical engineering problems to minimize or maximize an objective function. In this paper, we use the firefly algorithm to improve the optimal solution for the problem of directional ...
Muhammad Sulaiman +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
International Journal of Electrical Power & Energy SystemsProtection coordination is typically approached considering the main network configuration. Nevertheless, contingencies such as generator or line failures may disrupt power grids.
Talal Elemamali Sati +2 more
doaj +1 more source
Iranian Journal of Electrical and Electronic Engineering, 2015 The aim of the relay coordination is that protection systems detect and isolate the faulted part as fast and selective as possible. On the other hand, in order to reduce the fault clearing time, distance protection relays are usually equipped with pilot ...
Y. Damchi, J. Sadeh, H. Rajabi Mashhadi
doaj