谐振接地系统单相接地故障暂态仿真与分析 

严敏1，郭谋发1，林伟2 
1 福州大学 电气工程与自动化学院，福建 福州 350108；
2 福建水口发电集团尤溪流域分公司，福建 三明 365100 
 

摘 要：在谐振接地系统时域、频域特征分析的基础上，通过Matlab软件建立以分布参数为基础的高精度谐振接地系统单相接地故障仿真模型，分析了几种极端故障情况下的线路零序电流波形的特征。通过分析可得：谐振接地系统单相故障暂态接地电流中含有暂态电感电流与电容电流，其比例随故障时刻的不同而变化；在选定频带内，故障线路和非故障线路暂态零序电流极性相反；故障初相角为零附近（0～30°）经小电阻接地故障情况下，故障线路零序电流出现倒相，且倒相程度随故障初相角的变化而不同；在大电阻接地故障的情况下，故障与非故障线路零序电流在稳态时出现一定的相位移。

关键词：谐振接地系统；单相接地故障；Matlab仿真；倒相；相位移

中图分类号：TM864 文献标识码：A 文章编号：1007-3175(2013)02-0001-05

Single Phase Grounding Fault Transient Simulation and Analysis of Resonant Grounding System 

YAN Min1, GUO Mou-fa1, LIN Wei2 
1 College of Electric Engineering and Automation, Fuzhou University, Fuzhou 350108, China;
2 Youxi River Power Co.,Ltd of Fujian Shuikou Power Generation Group, Sanming 365100, China 
 

Abstract: On the basis of resonant grounding system time domain and frequency domain features analysis, this paper established high accuracy resonant grounding system single phase grounding fault simulation model with distributed parameters as basis via Matlab software and analyzed characteristics of line zero-sequence current waves under some kinds of extreme fault conditions. Analysis showed that single phase fault transient ground current of resonant grounding system contained transient inductor current and capacitor current, whose proportion varied with fault time. Within the selected frequency band, the polarity of transient zero-sequence current in the fault line was opposite to that of non-fault line. When the early phase angle is near zero(0~30°), in the case of low resistance grounding fault, fault line zero-sequence current appeared in reversed phase, changing differently following fault early angle changes. In the case of large resistance grounding fault, fault and non-fault line zero-sequence current would have a phase shift in steady-state.

Key words: resonant grounding system; single phase grounding fault; Matlab simulation; reversed phase; phase shift

参考文献
[1] 束洪春.配电网络故障选线[M].北京：机械工业出版社，2008.
[2] 庞清乐.小电流接地故障选线与定位技术[M].北京：电子工业出版社，2010.
[3] 庞清乐.基于智能算法的小电流接地故障选线研究[D].济南：山东大学，2007.
[4] 孙福生.谐振接地系统小电流接地故障选线技术评价体系及分析[D].济南：山东大学，2010.
[5] 揭林玲，唐昆明，张太勤，周小平.基于暂态信号相频特性的小电流接地选线研究[J].电力系统保护与控制，2009，37(3)：50-54.
[6] 张伟刚，张保会.中性点非直接接地系统零序网络的相频特性[J].电力自动化设备，2010，30(3)：71-75.
[7] 张新慧，薛永端，潘贞存，徐丙垠，魏佩瑜.单相接地故障零模暂态特征的仿真分析[J].电力自动化设备，2007，27(12)：39-43.
[8] 薛永端.基于暂态特征信息的配电网单相接地故障检测研究[D].西安：西安交通大学，2003.
[9] 薛永端，冯祖仁，徐丙垠.中性点非直接接地电网单相接地故障暂态特征分析[J].西安交通大学学报，2004，38(2)：195-199.
[10] 王伟，焦彦军.暂态信号特征分量在配网小电流接地选线中的应用[J].电网技术，2008，32(4)：96-100.