摘要
2009年11月德阳换流站进行了站系统调试工作。期间,在对HP3滤波器进行试充电合闸时,该滤波器的两套差动保护动作。文章在对德阳换流站HP3滤波器的特性和保护配置情况进行简要介绍的基础上,对差动保护的动作原因进行了深入分析。分析表明此次故障是由于滤波器低端电容器组的低电位端在滤波器充电瞬间承受了过高的暂态电压,导致设备出现严重的放电现象从而引起保护动作,属设备绝缘配合不当。在调整滤波器低端电容器组和电抗器的电气连接方式后,重新进行相关试验正常。
During the station commissioning test in November 2009 in Deyang converter station,two sets of differential protection on the HP3 filter acted when closing the switch.Given brief introduction of the characteristics of HP3 filter and its protection configuration,the reason caused the protection action was completely analyzed.The analysis result indicates that the fault is due to the low potential side of the filter low-end capacitor bank withstood overhigh transient voltage while the switch was closing,resulted in serious discharge and the differential protection action.Given the reason is inappropriate insulation coordination.After changing the low-end capacitor connection with the reactor,re-test shows normal.
出处
《华中电力》
2011年第1期64-67,共4页
Central China Electric Power
关键词
换流站
C型滤波器
滤波器保护
绝缘配合
converter station
C-type filter
filter protection
insulation coordination
