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 Bingquan,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:active 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 Bingquan	国网浙江省电力有限公司，杭州 310007
杜浩良	DU Haoliang	国网金华供电公司，浙江金华 321000
方愉冬	FANG Yudong	国网浙江省电力有限公司，杭州 310007
陈昊	CHEN Hao	国网金华供电公司，浙江金华 321000
徐文成	XU Wencheng	北京林业大学工学院, 北京 100083
刘素梅	LIU Sumei	北京林业大学工学院, 北京 100083

摘要点击次数: 679

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地被引入配电网，但配电网的多源、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，文章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距离算法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 network is altered from simple radial network to multi-terminal active network. This shift has caused a decline in the performance of traditional relay protection methods in distribution network. Consequently, current differential protection is being increasingly adopt- ed in distribution network. However, the characteristics of distribution network, such as multi-source, multi-load branches, and bidirectional power flow, leads to decreased adaptability of traditional current differential protection. To address these problems, this paper 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 current on both sides, the sensitivity compensation coefficient is introduced to enhance sensitivity of protection. Additionally, considering the 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, the performance of current differential protection is enhanced. Based on PSCAD/EMTDC it is demonstrated that the proposed protection can offer superior sensitivity and security compared to traditional differential current protection.

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