余丰,郑升讯,陈巧勇,徐建文,鲍巧敏
YU Feng,ZHENG Shengxun,CHEN Qiaoyong,XU Jianwen,BAO Qiaomin

• 1:国网浙江省电力公司杭州供电公司

摘要(Abstract)：

近年来,随着真空断路器在电力系统的普及应用,与之相关的系统过电压事故也时有发生,特别是在开断感性负载时更为常见。为了能对过电压的发展过程进行更为深入地研究,应用EMTP对某变电站真空断路器开断并联电抗器过程中产生的操作过电压进行仿真分析。通过建立电弧电流过零判断、重燃判断、真空开关介质动态绝缘强度曲线等模型,模拟真空断路器开断过程中的重燃过程。仿真结果表明,真空断路器开断感性负载时,一旦发生三相电弧的反复重燃,操作过电压峰值会远高于系统额定运行电压,对系统绝缘带来严重的安全隐患。
With the wide application of vacuum breakers in power system in recent years,the consequential system overvoltage accidents also happen frequently,especially when the inductive load is switched.In order to further study the development of overvoltage,EMTP is used to simulate the operating overvoltage in substation during shunt reactors breaking with vacuum breaker.By establishing models of arc current zero-crossing,arc reignition and dielectric strength characteristics,the arc reignition during the opening process of vacuum switch is simulated.Simulation results show that,if the arc reignition occurs when the inductive load is cut off by the vacuum switch,peak of operating overvoltage is much higher than rated operating voltage of the system,which brings serious security hazards to system insulation.

关键词(KeyWords)： 真空断路器;操作过电压;并联电抗器;EMTP
vacuum breaker;operating overvoltage;shunt reactor;EMTP

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 余丰,郑升讯,陈巧勇,徐建文,鲍巧敏
YU Feng,ZHENG Shengxun,CHEN Qiaoyong,XU Jianwen,BAO Qiaomin

DOI: 10.19585/j.zjdl.201710010

参考文献(References)：

• [1]KOSMAC J,ZUNKO P.A Statistical Vacuum Circuit Breaker Model for Simulation of Transient Overvoltages[J].IEEE Transactions on Power Delivery,1995,10(1):294-300.
• [2]HELMER J,LINDMAYER M.Mathematical Modeling of the High Frequency Behavior of Vacuum Interrupters and Comparision with Measured Transients im Power Systems[C]//IEEE XVIIth Interna-tional Symposium on Discharges and EI-ectrical Insulation in Vacuum,Berkeley,USA,1996.
• [3]CZARNECKI L,LINDMAYER M.Measurement and Statistical Simulation of Multiple Reignitions in Vacuum Switches[J].IEEE Transactions on Plasma Science,1985,13(5):304-310.
• [4]WONG S M,SNIDER L A,LOE W C.Overvoltages and Reignition Behavior of Vacuum Circuit Breaker[C]//Proceedings of the 6th International Conference on Advances in Power System Control,Operation and Management,Hong Kong,China,2003.
• [5]孙广生.真空断路器多次重燃过电压及其防护[J].中国电力,1981(8):38-44.
• [6]刘卫东,钱家骊.真空开关开断单相感性小电流的操作过电压[J].高压电器,1986,22(2):9-15.
• [7]谢广润.电力系统过电压[M].北京:水利电力出版社,1991.
• [8]张永宏.操作过电压及其保护[J].冶金动力,2003,95(1):46.
• [9]杜宁,吴求刚,张景升,等.真空断路器开断并联电抗器的三相建模[J].高压电器,2010,46(3):6-9.
• [10]尹奎龙.真空开关操作过电压及其防护研究[D].北京:华北电力大学,2003.
• [11]安昌萍,司驳霞,廖瑞金,等.35 kV真空断路器开断空载变压器时过电压的研究[J].中国电机工程学报,2002,22(8):99-103.
• [12]魏钢,张照辉,杨庆,等.12 kV真空断路器开断并联电抗器电弧重燃三相建模[J].电气应用,2015,34(16):75-80.
• [13]单蒙,雷才嘉.高压并联电容器操作过电压仿真模型构建分析[J].机电工程技术,2011,40(5):19-20.
• [14]杨超,陈仕修.EMTP在计算开关操作过电压的应用[J].电气开关,2005(5):1-3.
• [15]万亦如,杜鹃,刘庄.隔离开关多次重燃的VFTO计算模型[J].浙江电力,2014,33(2):22-25.