NDLI: Highly sensitive microgrid protection using overcurrent relays with a novel relay characteristic

Content Provider	IET Digital Library
Author	Darabi, Ahmad Bagheri, Mehdi Gharehpetian, Gevork B.
Abstract	Following the high penetration of synchronous generators (SGs) in the power network, optimal overcurrent coordination improvement under faulty conditions has become a crucial problem. To reduce the overcurrent relay operating time, a new overcurrent relay curve is proposed in this study. Then, the overcurrent coordination problem is overcome by using a robust combinatorial optimisation method. Additionally, SG sizing and location is performed to verify the merits of both the proposed relay curve and the applied optimisation algorithm. The proposed relay curve performance is compared with other non-standard relays characteristic available in the literature for a standard microgrid. Then, the proposed relay curve is applied to both the 8-bus transmission and the 33 kV distribution portion of the 30-bus IEEE standard power test systems. Then, the SG transient stability for different fault locations is analysed. Finally, an accurate comparison between the proposed relay curve and standard/non-standard curves available in the literature is provided by applying the same optimisation method and network topology. The simulation results confirm the superiority of the proposed relay curve.
Starting Page	1201
Ending Page	1209
Page Count	9
ISSN	17521416
Volume Number	14
e-ISSN	17521424
Issue Number	Issue 7, May (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/14/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2019.0793
Journal	IET Renewable Power Generation
Publisher Date	2020-02-03
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	30-bus IEEE Standard Power Test Systems Distributed Power Generation Distribution Network Fault Location Highly Sensitive Microgrid Protection IEEE Standards Nonstandard Relay Optimal Overcurrent Coordination Improvement Optimisation Optimisation Technique Overcurrent Coordination Problem Overcurrent Protection Overcurrent Relay Overcurrent Relay Curve Overcurrent Relay Operating Time Power Engineering Computing Power System Control Power System Protection Relay Characteristic Relay Curve Performance Relay Protection Robust Combinatorial Optimisation Method Synchronous Generator Synchronous Machine Voltage 33.0 KV
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

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