摘要
从理论上对经接地变高阻方式接地的发电机定子单相接地故障电压特征进行分析,通过MATLAB计算和理论推导两种方式计算故障点过渡电阻。通过从铁磁谐振产生机理入手,区分了主变压器低压侧接地故障和电压互感器铁磁谐振发生的起止时间,判断了故障点位置,为故障检查提供了依据。
The characteristics of fault voltage waveforms generated by generator stator single phase grounding fault turned to grounding in high impedance mode are analyzed and the point of failure transient resistance is calculated and derived via the MATLAB.By proceeding from the mechanism of ferro-resonance,the sequence of the main transformer”s low voltage side grounding fault and the start and stop time of the voltage transformer ferro-resonance is distinguished and the location of the fault point is judged,providing a basis for fault inspection.
出处
《电力系统自动化》
EI
CSCD
北大核心
2014年第16期132-135,共4页
Automation of Electric Power Systems
关键词
定子接地保护
故障点
过渡电阻
铁磁谐振
stator grounding protection
fault point
transient resistance
ferro-resonance
