摘要
介绍了某500 kV变电站主变压器空载合闸重瓦斯保护动作跳闸的原因,并采用计算机程序对变压器的合闸励磁涌流进行了详细仿真计算,与变电站中央控制室采集的波形数据进行对比,推断出冲击合闸时铁心的最大剩余磁通密度,并提出防止变压器空载合闸时重瓦斯动作的措施。
The reasons are introduced that protective tripping is against strong gas of no-load switching in of 500 kV main transformer.Closing excitation inrush current of transformer is emulationally analyzed and calculated through computer program,and also is compared with waveform data of substation central control house to conclude max residual magnetic flux density of core during impulse closing,at last,protective action against strong gas of no-load closing of main transformer is advanced.
出处
《河北电力技术》
2007年第4期49-51,共3页
Hebei Electric Power
关键词
主变压器
空载合闸
励磁涌流
气体继电器
瓦斯保护
跳闸
main transformer
no-load switching in
excitation inrush current
buchholz relay
gas protection
tripping
