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Analysis of explosion on 35kV voltage transformer in 500kV substation
Author(s): 
Pages: 82-85
Year: Issue:  13
Journal: POWER SYSTEM PROTECTION AND CONTROL

Keyword:  变电站不接地系统两相接地故障电弧接地过电压铁磁谐振;
Abstract: 分析了不接地系统两相经过渡电阻接地,非故障相电压升高,产生电弧接地过电压,激发铁磁谐振的复故障过程特征.基于故障数据,采用相量分析方法,对某500kV变电站35kV互感器爆炸事故进行了快速的故障定位分析和判定,提出了有效的防范措施.现场实践证明了该方法的简捷有效性,对变电站快速诊断事故及进行有效的防范具有一定的参考意义.
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