高压直流接地极线路阻抗监视系统断线故障时动作性能评估  

Performance Evaluation of HVDC Electrode Line Impedance Supervision System under Line Break Fault

作　　者：李小鹏 滕予非 宋新尧 李世龙 罗荣森 Li Xiaopeng;Teng Yufei;Song Xinyao;Li Shilong;Luo Rongsen(State Grid Sichuan Electric Power Research Institute,Chengdu 610041,Sichuan,China;School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,Shanxi,China)

机构地区：[1]国网四川省电力公司电力科学研究院,四川成都610041 [2]西安交通大学电气工程学院,陕西西安710049

出　　处：《四川电力技术》2019年第4期7-10,共4页Sichuan Electric Power Technology

摘　　要：高压直流接地极线路阻抗监视系统用于监测接地极线路运行状态。阻抗监视系统的动作性能直接影响着对接地极线路运行状态的实时感知。通过理论分析,推导了接地极线路在双回线断线和单回线断线故障情况下,阻抗监视系统测得的阻抗结果。通过不同故障位置的阻抗结果遍历,分析了不同断线故障情况下阻抗监视系统的动作性能。分析结果显示,在单回线断线故障时,在特定的接地极线路长度下,阻抗监视系统容易发生拒动。The operation state of HVDC electrode line is monitored by electrode line impedance supervision(ELIS).The per-formance of ELIS will affect the operation state identification of electrode line.With theoretical analysis,the measured imped-ance by ELIS is obtained under double-line break faults and single-line break faults.The performance of ELIS is analyzed based on the impedance measured with different break faults.The results show that for single-line break faults under some specific electrode line lengths,the ELIS will be unable to monitor the fault reliably.

关 键 词：接地极线路 阻抗监视系统 评估性能 

分 类 号：TM934[电气工程—电力电子与电力传动]