Energy-based Directional Pilot Protection for Distribution Networks with IBDGs Considering Unmeasured Load Switching

IF 6.9 2区工程技术 Q2 ENERGY & FUELS

CSEE Journal of Power and Energy Systems Pub Date : 2023-03-12 DOI:10.17775/CSEEJPES.2021.09230

Chenghan Zhou;Guibin Zou;Shuo Zhang;Xuhui Wen

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Abstract

Inverter-based distributed generations (IBDGs) are the main approach to utilizing clean energy in distribution networks (DNs). Compared with synchronous source, fault response of IBDG is very different. As a result, in DNs with high penetration of IBDGs, legacy protection schemes will no longer be applicable. In this paper, an energy-based directional pilot protection scheme suitable for DNs with IBDGs is proposed. This scheme considers the large range of phase angle caused by IBDG integration and uses improved energy polarity criterion to determine fault direction. In addition, magnitude of energy is used to distinguish between faults and load switching to overcome maloperation of directional pilot protection caused by internal unmeasured load switching. The proposed scheme first uses local measured information to determine fault direction sign and then exchanges the direction sign with the remote terminal. This scheme does not require high-bandwidth communication and strict data synchronization, so it can be implemented at a low cost. Finally, simulation studies verify effectiveness of the proposed scheme.

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考虑到未测量的负载切换，为具有 IBDG 的配电网络提供基于能量的定向先导保护

基于逆变器的分布式发电（IBDG）是配电网（DN）利用清洁能源的主要方法。与同步源相比，IBDG 的故障响应非常不同。因此，在 IBDG 高度普及的配电网中，传统的保护方案将不再适用。本文提出了一种适用于具有 IBDG 的 DN 的基于能量的定向先导保护方案。该方案考虑了 IBDG 集成造成的较大相角范围，并使用改进的能量极性准则来确定故障方向。此外，还使用能量大小来区分故障和负载切换，以克服内部未测量负载切换造成的定向先导保护误动作。建议的方案首先使用本地测量信息确定故障方向符号，然后与远端交换方向符号。该方案不需要高带宽通信和严格的数据同步，因此可以低成本实施。最后，仿真研究验证了建议方案的有效性。

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

CSEE Journal of Power and Energy Systems Energy-Energy (all)

CiteScore

11.80

自引率

12.70%

发文量

389

审稿时长

26 weeks

期刊介绍： The CSEE Journal of Power and Energy Systems (JPES) is an international bimonthly journal published by the Chinese Society for Electrical Engineering (CSEE) in collaboration with CEPRI (China Electric Power Research Institute) and IEEE (The Institute of Electrical and Electronics Engineers) Inc. Indexed by SCI, Scopus, INSPEC, CSAD (Chinese Science Abstracts Database), DOAJ, and ProQuest, it serves as a platform for reporting cutting-edge theories, methods, technologies, and applications shaping the development of power systems in energy transition. The journal offers authors an international platform to enhance the reach and impact of their contributions.