摘要
分析了我国目前小电流接地系统发生单相故障时的故障特征,指出了鉴相电路在故障信息提取时的重要作用。重点介绍了鉴相电路的组成,根据系统运行要求,计算得出微分电路的微分常数取值范围,为电路设计提供了指导,提高了故障识别的准确率。
Single phase grounding fault feature of small current neutral grounding system is discussed.Phase discrimination circuit plays an important role in fault information extraction.Phase discrimination circuit composition is mainly introduced.Differential constant range of differential circuit is calculated according to the operation of the system requirements.The whole analysis provides a guide for circuit design and improves the fault identification accuracy.
出处
《电气开关》
2011年第5期38-40,共3页
Electric Switchgear
关键词
小电流接地系统
单相接地故障
鉴相电路
small current neutral grounding system
single phase grounding fault
phase discrimination circuit
