计及故障分闸角与单相故障的后续换相失败分析  

Analysis of Subsequent Commutation Failures with Fault Division Angle and Single-Phase Faults Considered

作　　者：胥仲晖 尹纯亚 达塔娜 马星 樊庆东 XU Zhonghui;YIN Chunya;Datana;MA Xing;FAN Qingdong(School of Electrical Engineering,Xinjiang University,Urumqi 830046,Xinjiang,China;Urumqi Power Supply Company,State Grid Xinjiang Electric Power Co.,Ltd.,Urumqi 830047,Xinjiang,China;Electric Power Research Institute of State Grid Xinjiang Electric Power Co.,Ltd.,Urumqi 830011,Xinjiang,China)

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830046 [2]国网新疆电力有限公司乌鲁木齐供电公司,新疆乌鲁木齐830047 [3]国网新疆电力有限公司电力科学研究院,新疆乌鲁木齐830011

出　　处：《电网与清洁能源》2024年第10期67-75,共9页Power System and Clean Energy

基　　金：新疆维吾尔自治区青年科学基金(2022D01C85)。

摘　　要：针对换相失败影响因素分析已经取得一些成果,但故障清除时刻(故障分闸角)对换相失败的影响有待进一步研究。首先基于换相失败过程分析过零点偏移角对关断角的影响;其次基于换相电压时间面积法分析不同故障合闸角对逆变器首次换相失败的影响,并进一步分析故障分闸角及过零点偏移角对后续换相失败的影响,发现故障在换相过程中清除引发后续换相失败风险最大;最后以单相接地故障为例,基于PSCAD/EMTDC中的(conseil international des grands reseaux electriques,CIGRE)模型的不同故障合闸角与分闸角的仿真测试结果验证了理论分析的正确性。Although some results have been obtained in the analysis of factors affecting commutation failure,but the influence of fault clearance time(fault division angle)on commutation failure still needs to be studied further.Firstly,based on the commutation failure process,the effect of zerocrossing offset angle on the turn-off angle is analyzed.Secondly,based on the time area of commutation voltage,the influence of different initial fault angles on the first commutation failure of the inverter is analyzed,and the influence of fault division angle and zero-crossing offset angle on subsequent commutation failure is further analyzed.It is found that the risk of subsequent commutation failure is greatest when the fault is cleared in commutation.Finally,taking single-phase grounding fault as an example,simulation test results of different initial fault angles and fault division angle based on PSCAD/EMTDC and CIGRE HVDC models verify the correctness of the theoretical analysis.

关 键 词：高压直流输电 单相接地故障 换相失败 过零点偏移角 换相电压时间面积 故障合闸角 故障分闸角 

分 类 号：TM71[电气工程—电力系统及自动化]