摘要
单相接地故障是配电系统中最常见的故障。分析单相故障发生的原因、危害和影响。针对故障发生时的主要特征和报警信息,阐述对不同类型单相接地故障的判断方法,并在此基础上提出故障的预防和处理方法。详细分析单相接地故障时各主要电气量的变化特征和计算方法,包括短路电流、非故障相电压、电容电流等。
Single-phase-to-earth fault is the most common fault in distribution system. The reasons and influence of the fault are analyzed.The main characteristics and alarm of the single-phase-to-earth fault are described and the judging methods for different types of faults are proposed.On this basis, related preventive measures and countermeasures are also proposed.The calculation methods and variation characteristics of main electrical data during single-phase-to-earth fault are illustrated, including short circuit current, non-fauh phase voltage and the capacitance current, etc.
出处
《山东电力技术》
2014年第4期18-23,共6页
Shandong Electric Power
关键词
单相接地故障
中性点不接地系统
配电网
短路电流
single-phase-to-earth fault
networks with ungrounded neutral
distribution network
short circuit current
