Penetration of the power grid by renewable energy sources, distributed storage, and generators is becoming increasingly common. Increased utilization these resources (DERs) has given rise to additional protection coordination concerns, particularly where they are utilized in an unbalanced manner or loading among phases unbalanced. Digital relays such as SEL-751 (produced Schweitzer Engineering ...

This paper presents a study on protection coordination of overcurrent relays (OCRs) in a distributed system by considering its different operating modes. Two different case studies which are considered in present work for protection coordination include: (i) DG interfaced distribution system in grid connected mode and (ii) DG interfaced distribution system in islanded mode of operation. The pro...

Traditionally, the protection of power transformers has been relegated to the application of transformer differential and backup overcurrent relays to provide shortcircuit protection. With the advent of modern multifunction transformer packages, differential and overcurrent protection are only two of many protective and logic functions that can be incorporated into the transformer protection pa...

A protection scheme is proposed using alienation method derived from coherence model which a backup for the differential overcurrent of synchronous generators. This realized by computational technique based on coefficients estimated generator voltage and current signals considered to be mounted beside main system, operates in cases that unable detect internal faults. novel algorithm adjusting s...

This paper introduces a new framework of deep reinforcement learning based protective relay design in power distribution systems with many distributed energy resources (DERs). With increasing penetration electronically-interfaced resources, conventional overcurrent relays’ performance is rendered less effective due to the two-way uncertainties flow patterns. In this paper, machine learning-base...

Goal. The integration of photovoltaic distributed generations in the active distribution network has raised quickly due to their importance delivering clean energy, hence, participating solving various problems as climate change and pollution. Adding battery energy storage systems would be considered one best choices giving solutions mentioned issues its characteristics quick charging dischargi...

The present <span lang="EN-US">study is focussed on a comparative analysis of different meta-heuristic optimization approaches for directional overcurrent relay (DOCRs) coordination which has been discussed and presented in the literature. Further, to have performance methods they tested power system network sizes. To overcome such issues, this work proposed simplex linear programming tec...

Abstract This paper addresses the challenge of protecting electrical networks in presence distribution generators (DGs). The use DGs affects fault currents, leading to miscoordination between protection relays and causing constraints on network reliability. To tackle this issue, authors propose an adaptive scheme (APS) based a modified pelican optimization algorithm (MPOA) active database manag...