Fast and Practical Protection Coordination Strategy for Radial Distribution Systems with Distributed Generations

This paper presents a new protection method of coordinating the open/close states of the overcurrent relays in a power distribution system with DG units. A faulty line is initially identified, and all downstream and upstream paths leading to the DG units are determined using the backtracking algorit...

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Bibliographic Details
Published in:Journal of engineering and economic development 2015-07, Vol.2 (2), p.1-1
Main Author: Zayandehroodi, Hadi
Format: Article
Language:English
Subjects:
Accuracy
Algorithms
Backups
Coordination
Distributed generation
Economic development
Electricity distribution
Fault diagnosis
Power distribution
Radial distribution
Strategy
Studies
Test systems
Upstream
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Summary:This paper presents a new protection method of coordinating the open/close states of the overcurrent relays in a power distribution system with DG units. A faulty line is initially identified, and all downstream and upstream paths leading to the DG units are determined using the backtracking algorithm. The main protection algorithm then determines the open/close states of relays, thereby isolating the faulty line. A backup protection algorithm is considered in completing the protection coordination scheme in case the primary protection scheme fails. The accuracy of the proposed protection coordination method has been tested on a 22-bus test system. Results illustrate that the proposed protection strategy can accurately coordinate the relays in a power distribution system with DG units.
ISSN:2333-0325
2333-0333