中性点绝缘系统单相接地故障辨识与仿真  

Identification and Simulation of Single-Phase Grounding Fault in Neutral Point Insulation System

作　　者：顾荣斌[1] 蔡旭[1] 金之俭[1] 戴军瑛[2] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海200240 [2]上海电力公司市南供电公司,上海200233

出　　处：《计算机仿真》2010年第1期257-260,共4页Computer Simulation

摘　　要：正确判断故障类型是正确进行接地选线的前提和关键。以往国内多侧重于对接地选线方法的研究,而对选线的研究比较少。单相电弧接地故障是中压配电网中的主要故障形式。由于电弧的复杂性,以往的研究分析中,还没有很有效的方法可以辨识。为了进行故障辨识方面的研究,提出一种依据故障相电压稳态波形中基波含量大小来区分电弧故障的方法,与现有的比较中性点电压与故障前相电压相角差的方法相配合,就能有效地区分出不同类型的接地故障。通过PSCAD仿真验证,结论符合实际,表明辨识方法是有效的。Correctly judge the type of fault is the premise and the key of correct fault line selection.In the past,few research has been done in this area.People paid more attention to the research on the method of fault line selection.The single-phase arcing fault is the main fault form in medium voltage distribution networks.For its complexity,there is no effective method to identify this fault.This paper proposed a new method to distinguish the arcing fault based on the fundamental component of the fault voltage steady waveform.Combining with the method based on the phase angle difference between the neutral voltage and the phase voltage,different types of grounding fault can be identified.At last,the effect of this identification method was validated by simulation on PSCAD.

关 键 词：单相接地 电弧接地 故障相电压 

分 类 号：TM711[电气工程—电力系统及自动化]