宜都换流站5611~#交流滤波器跳闸故障原因分析

随着高压直流输电技术的发展,换流站在跨区电网中有着越来越多的应用。交流滤波器作为换流站的主要设备,起着滤波和无功补偿的作用。需要对交流滤波器特性进行研究,掌握其运行特点,以保证换流站正常输送直流功率。宜都换流站5611#交流滤波器2011年2月2日发生一起跳闸故障,此次故障造成一次设备损坏。本文对滤波器工作原理、电容器塔的结构、参数进行了介绍。结合故障录波图,电气参数及现场的检查,找到了此次故障的原因并进行了分析,最终并提出了运行维护建议。

Fault Trip Analysis of 5611~# AC Filter in Yidu Converter Station

With the development of HVDC transmission technology,more and more converter stations have been used at interconnected power grid.AC filter,as the main equipment of converter station,plays the role of filtering and reactive power compensation.The characteristics of AC filer are studied and the operation characteristics mastered so to assure normal transmission of DC power by the converter station.A trip fault of 5611# AC filter in Yidu converter station was happened on February 2nd 2011,causing damage of primary equipments.In this paper,the working principle of the filter,the structure of the capacitor tower and parameters are introduced.The reason for the fault have been found and analyzed in the combination of the fault recorder,electrical parameters and field inspection,and suggestions for operation and maintenance are finally proposed.