直流高压发生器限流电阻对金属氧化物避雷器试验的影响

金属氧化物避雷器(MOA)是电力系统中不可或缺的设备,为了保证电网的安全稳定运行,应定期对其进行预防性试验.简要介绍了MOA试验项目及其影响因素,着重讲述了试验设备对试验结果的影响.直流高压发生器加装限流电阻后,MOA的参考电压和泄漏电流都较实际值偏大.鉴于此,提出了现场试验时去除限流电阻影响的方法,并给出了推导公式.

Influence of High Voltage DC Generator Current Limiting Resistor on MOA Test

Metal oxide arrester(MOA) are indispensable equipment in power system.In order to ensure security and stability operation of the grid,the preventive test should be carried out regularly.MOA test items and influence factors are introduced briefly,and emphasis on the influence of test equipment on the test result.After the high voltage DC generator installed the current limiting resistor,the reference voltage and the leakage current of MOA arrestor are larger than the actual value.As the result,the method of removing the affect current limiting resistor on the scene is put forward,and the deduced formula is proposed.