换流站阀厅避雷器停电例行试验研究

Power-off Routine Tests of the Lightning Arresters in Valve Halls of Converter Stations

针对换流阀塔内半高型布置的并联阀片直流避雷器提出了一种不拆解避雷器的现场试验方法,以降低测试难度和加快检修进度。具体做法是根据并联阀片数目施加相应参考电流,测量直流参考电压和75%直流参考电压下的泄漏电流值,将结果与往年值或交接值比较,最后确定直流避雷器是否正常。对湖北某换流站内多个不同型号的并联直流避雷器进行了年度检修,与往年的测量值进行比较,所有并联直流避雷器均符合安全运行要求。

To decrease the difficulty and to accelerate the process of testing, a practical testing method for the hanging DC arresters with parallel valves is presented. This method applies testing current according to the parameters of the dc arresters to obtain the reference voltages, and measures the linkage current at 75%of the reference voltages. To check the status of the dc arresters,the measurement data is verified with the data of previous tests or the factory tests. The test of various types of DC arresters in a converter station of Hubei province was implemented during the annual maintenance,and measurement data is verified with the data of previous tests, and all the parallel DC arresters meet the safe operation requirements.