基于抗干扰系数的配电网增强型电流差动保护

朱炳铨; 杜浩良; 方愉冬; 陈昊; 徐文成; 刘素梅

朱炳铨,杜浩良,方愉冬,陈昊,徐文成,刘素梅.基于抗干扰系数的配电网增强型电流差动保护[J].电测与仪表,2026,63(4):131-142.
ZHU Bing Quan,DU Haoliang,FANG Yudong,CHEN Hao,XU Wencheng,LIU Sumei.Enhanced Current Differential Protection Principle Based on Anti-interference Coefficient for Distribution Network[J].Electrical Measurement & Instrumentation,2026,63(4):131-142.

基于抗干扰系数的配电网增强型电流差动保护

Enhanced Current Differential Protection Principle Based on Anti-interference Coefficient for Distribution Network

DOI：10.19753/j.issn1001-1390.2026.04.014

中文关键词: 有源配电网分布式能源电流差动保护 Hausdorff距离抗干扰系数

英文关键词:distribution network, distributed generator, current differential protection, Hausdorff distance, anti-interference coefficient

基金项目:国网浙江省电力有限公司科技项目(B311JH23000D)；国家自然科学基金青年资助(52107069)

作者中文名	作者英文名	单位
朱炳铨	ZHU Bing Quan	国网浙江省电力有限公司
杜浩良	DU Haoliang	国网金华供电公司
方愉冬	FANG Yudong	国网浙江省电力有限公司
陈昊	CHEN Hao	国网金华供电公司
徐文成	XU Wencheng	北京林业大学工学院
刘素梅	LIU Sumei	北京林业大学工学院

摘要点击次数: 8

中文摘要:

随着分布式电源的广泛接入,配电网逐渐由简单的辐射状网络转变为多端有源网络,导致传统配电网继电保护方法动作性能下降,电流差动保护越来越多被引入配电网,但配网的多源、多负荷分支、功率双向流动等特征导致传统电流差动保护适应性变差。为解决上述问题,本文分析了不同类型分布式电源的故障电流特性,阐释了传统电流差动保护的适应性下降的原因。基于两侧电流的幅相特性引入了灵敏度补偿系数来提升保护灵敏度。此外,针对CT饱和等非理想情况导致差动保护存在误动风险的问题,引入了基于Hausdorff距离的抗干扰系数来提升保护安全性。通过合理设置两个系数的参数,使二者相互配合提升电流差动保护性能。PSCAD/EMTDC验证表明,所提出的保护方案的灵敏度和安全性均优于传统的电流差动保护。

英文摘要:

With the widespread integration of distributed generators, distribution networks are transformed from simple radial networks to multi-terminal active networks. This shift has caused a decline in the performance of traditional relay protection methods in distribution networks. Consequently, current differential protection is being increasingly adopted in distribution networks. However, the characteristics of distribution networks, such as multi-source, multi-load branches, and bidirectional power flow, lead to decreased adaptability of traditional current differential protection. To address these problems, this study analyzes the fault current characteristics of various types of distributed generators and explains the reasons for the decline in adaptability of traditional current differential protection. Based on the amplitude and phase of the currents on both sides, the sensitivity compensation coefficient is introduced to enhance sensitivity of protection. Additionally, to address the issue of misoperation in differential protection caused by non-ideal conditions such as CT saturation, an anti-interference coefficient based on Hausdorff distance is introduced to improve security of protection. By setting the parameters of these two coefficients appropriately, they collaborate to enhance the performance of current differential protection. Validation using PSCAD/EMTDC demonstrates that the proposed protection offers superior sensitivity and security compared to traditional current differential protection.

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