Protection Coordination in Radial Distribution System with Distributed Generation using Fault Current Limiter and Overcurrent Relay
Authors: Amrit Dhakal, Menaka Karki, Lalit Bikram Rana
Abstract— With the integration of Distributed Generation (DG) into the distribution network, the magnitude and direction of both normal and fault current is affected. The effect of DG on fault current can lead to failure in operation of protective devices in the existing protection system. It is also technically challenging and costly to redesign and to reconfigure the overall protection system whenever a new DG is integrated into the distribution network. One way to deal with this problem is to use Fault Current Limiter (FCL) with the addition of necessary new relays and reconfiguration of few existing relays. In this paper, four cases with different FCL and relay configuration is considered. OpenDSS software is used for load flow and fault analysis while MATLAB software is used for optimization. The value of FCL and the setup value of relays are optimized using Genetic Algorithm (GA). It is found that existing protection coordination can be achieved, by using FCL in addition to overcurrent relays for DG’s.
Keywords—Protection coordination, Distributed Generation (DG), Fault Current Limiter (FCL), Over-current Relay (OCR), Genetic Algorithm (GA)
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Published In: International Conference on Role of Energy for Sustainable Social Development (RESSD-2022)
Date of Conference: 8th-9th August 2022
Conference Location: Bhaktapur, Nepal
Publisher: IEEE Power and Energy Society Nepal Chapter
Cite the paper as:
A. Dhakal, M. Karki, L. B. Rana, “Protection Coordination in Radial Distribution System with Distributed Generation using Fault Current Limiter and Overcurrent Relay”, International Conference on Role of Energy for Sustainable Social Development, 8th-9th August 2022, Bhaktapur, Nepal