基于功率系数的超高压输电线路单相接地故障位置识别研究  

Research on Single-phase Grounding Fault Location Identification of EHV Transmission Line Based on Power Factor

作　　者：王杜鑫 张嘉慧 张培钧 钟敏 黄科 WANG Du-xin;ZHANG Jia-hui;ZHANG Pei-jun;ZHONG Min;HUANG Ke(Guangdong Power Grid Co.,Ltd.,Meizhou Power Supply Bureau,Meizhou 514000 China)

机构地区：[1]广东电网有限责任公司梅州供电局,广东梅州514000

出　　处：《自动化技术与应用》2024年第9期47-50,共4页Techniques of Automation and Applications

基　　金：南方电网项目,2022年梅州供电局数据应用维护项目(DI3222MZ0016)。

摘　　要：在判别单相接地故障性质时,识别故障位置是一个重要步骤。设计一种基于功率系数的超高压输电线路单相接地故障位置识别方法。该方法能够计算超高压输电线路单相接地故障下的功率系数,实现对负载损耗来源的量化。在实际负载损耗情况下,将线路等价为一个暂态等值电路,并实施输电线路的暂态分析,提取线路单相接地故障的暂态特征。基于多特征加权灰靶决策,设计超高压输电线路单相接地故障位置识别模型,实现单相接地故障的位置识别。测试结果表明,该方法的故障位置识别误差和平均故障位置识别时间都较短,具有一定的有效性。The fault location identification is an important step in determining the nature of single-phase grounding fault.This paper designs a single-phase grounding fault location identification method based on power coefficient for EHV transmission lines.The power factor of EHV transmission line under single-phase ground fault is calculated to realize the quantification of load loss source.Under the actual load loss,the transmission line is equivalent to a transient equivalent circuit,and the transient analysis of the transmission line is carried out to extract the transient characteristics of the single-phase grounding fault of the line.Based on multi-feature weighted grey target decision,the location recognition model of single-phase grounding fault of EHV transmission line is designed to realize the location recognition of single-phase grounding fault.The test results show that the fault location recognition error and average fault location recognition time of this method are low,and it has certain effectiveness.

关 键 词：功率系数 超高压输电线路 单相接地 故障检测 特征提取 

分 类 号：TP206[自动化与计算机技术—检测技术与自动化装置]