非有效接地配电系统单相接地故障特征参数及检测方法研究

IF 1.7 Q3 COMPUTER SCIENCE, INFORMATION SYSTEMS IET Cyber-Physical Systems: Theory and Applications Pub Date : 2023-05-02 DOI:10.1049/cps2.12055
Wanxing Sheng, Xiaohui Song
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引用次数: 0

摘要

非有效接地配电系统(NGDS)在中国和其他国家得到了广泛的应用。然而,长期以来,单相接地故障一直被监测系统误判或忽略,威胁着供电系统的安全和人身安全。在分析NGDS中SGF遗漏和误判的原因的基础上,提出了正确反映故障特征的NGDS故障特征参数概念和基于故障特征参数的SGF检测方法。然后,揭示了SGF中相电压和故障电流电阻元件的检测机理。分析了典型故障参数随配电系统规模(参数)和故障过渡电阻(如剩余电压和零序电流)的变化特征。还提出了特定尺度/参数的NGDS中SGF的本征参数,可以正确地反映不同过渡电阻下的故障特征。
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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Research on eigenparameters and detection methods for single-phase-to-ground faults in non-effectively grounded distribution systems

Non-effectively grounded power distribution systems (NGDS) are widely used in China and other countries. However, over a long time, single-phase-to-ground faults (SGF) have been misjudged or omitted by the monitoring system, threatening the security of the power supply system and human safety. Based on the reason analysis for the omitted and misjudged SGFs in NGDS, the concept of NGDS fault eigenparameters to correctly reflect fault characteristics and a method of SGF detection based on fault eigenparameters are proposed. Then, the detection mechanism of phase voltage and fault current resistive elements for SGF is revealed. The variation characteristics of typical fault parameters changing with distribution system scale (parameter) and fault transition resistance, such as residual voltage and Zero-sequence current (iA-iO), are analysed. The eigenparameters of SGF in certain NGDS with specific scales/parameters are also proposed, which can correctly reflect the fault characteristics under different transition resistances.

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来源期刊
IET Cyber-Physical Systems: Theory and Applications
IET Cyber-Physical Systems: Theory and Applications Computer Science-Computer Networks and Communications
CiteScore
5.40
自引率
6.70%
发文量
17
审稿时长
19 weeks
期刊最新文献
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