摘要
对一起35 kV系统铁磁谐振引发站用变爆炸事故进行了分析,提出造成该起事故的原因是电压互感器发生铁磁谐振引起的母线电压的升高造成了站用变系统绝缘破坏,进而了引发后续的短路故障。为了避免类似事故的发生,在35 kV母线电压互感器一次中性点安装了非线性消谐装置,投切35 kV母线和电容器组正常,抑制铁磁谐振效果良好。
A 35 kV transformer explosion accident caused by ferromagnetic resonance was analysed. It was found that the increase of the bus voltage due to ferromagnetic resonance of the potential transformer（PT）destroyed the 35 kV transformer＇s insulation system, resulting in subsequent short-circuit fault and the following accident. In order to avoid this kind of accident, a nonlinear harmonic elimination device was installed at the 35 kV PT neutral point, thus the 35 kV bus and capacitor operate normally, and the ferromagnetic resonance is suppressed perfectly.
出处
《高压电器》
CAS
CSCD
北大核心
2015年第12期174-178,共5页
High Voltage Apparatus
关键词
变压器
爆炸
事故分析
铁磁谐振
消谐
transformer
explosion
accident analysis
ferromagnetic resonance
harmonic elimination
