某220kV变电站35kV站用变压器爆炸事故分析与处理  

Analysis and Treatment of a 35 kV Transformer Explosion Accident in a 220 kV Substation

作　　者：端木林楠[1,2] 赵习静 蔡巍[1,2] 彭珑[1,2] 李雨[1,2] 赵媛[1,2] 马鑫晟[1,2] 

机构地区：[1]华北电力科学研究院有限责任公司,北京100045 [2]国网冀北电力有限公司电力科学研究院,北京100045 [3]中国水利电力对外公司,北京100120

出　　处：《高压电器》2015年第12期174-178,共5页High Voltage Apparatus

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.

关 键 词：变压器 爆炸 事故分析 铁磁谐振 消谐 

分 类 号：TM63[电气工程—电力系统及自动化] TM407