小电流接地系统故障仿真分析与研究  

Simulation and Analysis of SinglePhase to Ground Fault in The Indirectly Earthed Power System

作　　者：杨丽娜[1] 辛雷[2] 辛鹏[3] 

机构地区：[1]华北电力大学,北京100045 [2]北京供电公司,北京106200 [3]吉林省电力有限公司吉林供电公司,吉林吉林132011

出　　处：《东北电力大学学报》2010年第1期57-61,共5页Journal of Northeast Electric Power University

摘　　要：针对小电流接地系统单相接地故障接地选线困难的问题,通过理论分析、仿真研究和大量10 kV模拟实验验证,深入研究了该型故障的特征,着重研究了电弧接地故障时暂态零序测量电流的特征,以及故障线路与非故障线路暂态零序测量电流之间的关系。为了提取配电网单相接地故障选线和故障测距的暂态故障特征量,基于ATP仿真系统软件,搭建了小电流接地系统的配电网络仿真模型并综合考虑不同短路时刻和不同接地电弧电阻两个因素,对配电网小电流接地系统的单相接地故障进行了大量仿真。这些暂态特性可为研究基于单相接地故障暂态分析的接地选线方法提供理论依据。Through theoretical and simulation analyses and the verification of lots of simulating experiments in 10 kV power network, the transient characteristics of single phase to ground fault in the indirectly earthed power system are deeply studied. And the characteristics and relation between transient zero sequence measurement current in arc earth fault of fault feeder and non fault feeder are emphatically studied, the transient characteristic of single-phase to ground fault is used for the fault line selection and fault distance detection in distribution network. The distribution network simulation model is established for the Neutral Uneffectual Grounded System （NUGS）, based on the ATP, such as different short circuit time, arc-resistance, fault distances, line length and the compensation rates of arc-suppression coil, should be put into overall consideration. The signal-phase to ground fault of the NUGS is simulated so as to research the transient characteristics of single-phase to ground fault in distribution network. Through ＇analyzing these transient characteristics The results shows that these transient characteristics can provide the theoretical foundation for studying the detecting single-phase to ground fault methods.

关 键 词：暂态稳定 小电流接地电网 单相接地故障 ATP仿真软件 

分 类 号：TM713[电气工程—电力系统及自动化]