配电网单相接地选线技术综述

Summarization of Earth Selecting Wire Technique of Small Current Neutral Grounding System

采用小电流接地系统供电,可以提高配电网的供电可靠性。但是小电流接地系统单相接地长时间运行很容易发展成多相短路,不利于系统的有效运行,因此应尽快找出接地故障线路并予以切除。对配电网小电流接地系统接地选线技术进行了大量的研究,提出了很多接地选线的方法。旨在对这些接地选线方法进行归纳,总结出接地选线技术未来的研究方向。

Power supply of a small current neutral grounding system can increase power supply reliability of a distribution network,but the single phase grounding of the small current grounding system can easily result in multiphase short circuits in long-time running.detrimental to efficient running.So the grounding fault line should be quickly found and cut off.A lot of researches have been done for the small current grounding system selecting wire technique and put forward grounding selecting wire methods.The paper means to summarize these selecting wire methods and points out their coming research direction.