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.
出处
《计算机仿真》
CSCD
北大核心
2010年第1期257-260,共4页
Computer Simulation
关键词
单相接地
电弧接地
故障相电压
Single-phase grounding fault
Arcing fault
Fault voltage
