Optimal directional overcurrent relay settings for stable microgrids with synchronous and inverter-based resources

IF 5 2区工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Electrical Power & Energy Systems Pub Date : 2025-03-29 DOI:10.1016/j.ijepes.2025.110639

Abdelfattah A. Eladl , Ahmed N. Sheta , M. Elgamal , Juan C. Vasquez , Bishoy E. Sedhom

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引用次数: 0

Abstract

Microgrid (MG) is a small-scale system that offers on-site energy production and storage capabilities, allowing for the seamless integration of different technology-driven distributed energy resources (DERs), including inverter-based and synchronous-based DERs. Nonetheless, due to the changes caused by DERs in fault currents, providing protection for MGs is more challenging than traditional systems. The article examines the deployment of directional overcurrent relays (DOCRs) in MGs, considering the stability of DERs. Given the impact of inverter-based DERs’ integration and the limited inertia of synchronous-based DERs, extending the operating times of DOCRs may compromise MG stability after fault clearance. Therefore, a novel dual inverse settings for DOCRs to ensure relay coordination and MGs stability is proposed. Critical clearing times for DERs, accounting for inverter-based DER participation, are determined and integrated with coordination constraints to obtain DOCR settings using genetic algorithm. The proposed scheme is evaluated on an IEEE 33-bus test system with synchronous and inverter-based DERs.

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微电网 (MG) 是一种小型系统，具有现场能源生产和存储能力，可无缝集成不同技术驱动的分布式能源资源 (DER)，包括基于逆变器和同步的 DER。然而，由于 DER 在故障电流中引起的变化，为 MG 提供保护比传统系统更具挑战性。考虑到 DER 的稳定性，文章研究了在 MG 中部署定向过流继电器 (DOCR)。鉴于基于逆变器的 DERs 集成的影响和基于同步的 DERs 的有限惯性，延长 DOCRs 的工作时间可能会影响故障清除后的 MG 稳定性。因此，提出了一种新颖的 DOCR 双反设置，以确保继电协调和 MG 的稳定性。在考虑基于逆变器的 DER 参与的情况下，确定 DER 的临界清除时间，并与协调约束相结合，利用遗传算法获得 DOCR 设置。在具有同步和逆变 DER 的 IEEE 33 总线测试系统上对所提出的方案进行了评估。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Electrical Power & Energy Systems 工程技术-工程：电子与电气

CiteScore

12.10

自引率

17.30%

发文量

1022

审稿时长

51 days

期刊介绍： The journal covers theoretical developments in electrical power and energy systems and their applications. The coverage embraces: generation and network planning; reliability; long and short term operation; expert systems; neural networks; object oriented systems; system control centres; database and information systems; stock and parameter estimation; system security and adequacy; network theory, modelling and computation; small and large system dynamics; dynamic model identification; on-line control including load and switching control; protection; distribution systems; energy economics; impact of non-conventional systems; and man-machine interfaces. As well as original research papers, the journal publishes short contributions, book reviews and conference reports. All papers are peer-reviewed by at least two referees.