共用接地极导致站内接地网过流保护动作的分析及改造

Analysis and Transformation of Overcurrent Protection Action of Grounding Grid in Station Caused by Common Ground Electrode

文章以柳州换流站和桂中换流站共用接地极为研究对象,分析了一站在大地回线运行方式下,另一站进行大地金属回线转换时可能会导致站内接地网过流保护动作的问题,并提出相关改造建议。

Taking the common ground electrode of Liuzhou Converter Station and Guizhong Converter Station as the research object,this paper analyzes that when one station is in the operation mode of the ground return,another station performimg the transition between ground return and metal return may cause the overcurrent protection action of the grounding grid in the station.The related transformation to be carried out is researched.