谐振接地系统小电流接地故障选线技术的最新进展

The new development of fault line selection in the resonance grounding system

中性点不接地系统发生单相接地故障时,信号微弱,不易选线,对于谐振接地系统选线更加困难。本文列举了适用于谐振接地系统的各类新兴方法。如残流增量法、注入信号寻迹法、行波法、暂态法以及综合选线法。基于各自的原理、判据以及适用条件,通过分析其灵敏度及可靠性,阐述各种选线方法的技术优势及存在的缺陷,为故障选线研究开辟新的思路。

It is difficult fo select wire when there be single phase grounded fault in neutral point ungrounded system. This paper shows some new methods just like residual flow increment, signal tracking, traveling wave, transient state and complex selection. Analyzing the different theory, service condition, sensiblility and reliability it introduces the advantage and disadvantage of each method.