多回线路工频零序参数带电测量技术发展与展望

李振强; 孙正伟; 胡志坚; 田鹏飞; 范凯; 罗军

李振强,孙正伟,胡志坚,田鹏飞,范凯,罗军.多回线路工频零序参数带电测量技术发展与展望[J].电测与仪表,2025,62(11):33-43.
LI Zhenqiang,SUN Zhengwei,HU Zhijian,TIAN Pengfei,FAN Kai,LUO Jun.Development and prospect of live measurement technology for power frequency zero-sequence parameters of multi-circuit transmission line[J].Electrical Measurement & Instrumentation,2025,62(11):33-43.

多回线路工频零序参数带电测量技术发展与展望

Development and prospect of live measurement technology for power frequency zero-sequence parameters of multi-circuit transmission line

DOI：10.19753/j.issn1001-1390.2025.11.004

中文关键词: 多回线路工频参数带电测量测量精度工程应用

英文关键词:multi-circuit transmission line, power frequency parameter, live measurement, measurement accuracy, engineering application

基金项目:国家电网公司科技资助项目（项目编号5500-202305173A-1-1-ZN）

作者中文名	作者英文名	单位
李振强	LI Zhenqiang	电网环境保护全国重点实验室(中国电力科学研究院有限公司)，武汉 430074
孙正伟	SUN Zhengwei	国家电网公司东北分部，沈阳 110000
胡志坚	HU Zhijian	武汉大学电气与自动化学院，武汉 430072
田鹏飞	TIAN Pengfei	国网辽宁省电力有限公司，沈阳 110004
范凯	FAN Kai	国家电网公司东北分部，沈阳 110000
罗军	LUO Jun	山东达顺电子科技有限公司，济南 250032

摘要点击次数: 22

中文摘要:

多回线路零序参数带电测量不需要被测线路及周围平行线路停电，实际需求较大，但截止目前带电测量在工程中的应用极少。针对此问题，文中分析了多回线路参数带电测量准确性的影响因素，指出电压和电流互感器测量小信号的误差问题应予以重视；异频法和增量法是多回线路零序参数带电测量的主要方法，两者相结合可进一步抗强电磁干扰，并提高测量精度；在运行线路上利用线路单侧单相断路器分-合闸操作产生增量信号是可行的，且无过电压及安全风险，指出多回线路零序参数带电测量技术已具备推广应用的条件，未来在4回以上线路的分布参数算法、小型化异频电源方面还需要进一步研究，同时应加快出台相关的标准对多回线路参数带电测量进行规范。

英文摘要:

The live measurement of multi-circuit transmission lines zero-sequence parameters (LMZP) does not require the power outage of the measured line and the surrounding parallel lines, which has large actual demand. However, up to now, the application of live measurement in engineering is very rare. In view of this problem, this paper first analyzes the influencing factors of the accuracy of LMZP, and puts forward that the error of measuring small signal by voltage and current transformers should be given due attention. The non-power frequency and incremental method are the main methods of LMZP. Combined with these two methods, it can further resist strong electromagnetic interference and improve the measurement accuracy. It is pointed out that it is feasible to generate incremental signals by using the opening and closing operation of single-phase circuit breakers at one side of the line on the operating line, and there is no overvoltage and safety risk. It is pointed out that the technology of LMZP is ready for popularization and application. In the future, the distributed parameter algorithm of more than four-circuit lines and the miniaturization of non-power frequency power supply need to be further studied, and the relevant standards should be expedited to standardize the LMZP.

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