直流输电系统用直流分压器现场检测方法研究

Research on on-site testing method of DC voltage divider for HVDC transmission system

对直流输电系统中所用直流分压器设备的准确度进行现场检测,目前国内还没有检定规程或校准规范和实施程序。根据现场环境,提出使用桥式电阻分压器自校准的方法,提出现场实施程序,注意事项,主要仪器的选型及误差分析,分析了现场存在的影响因素,以及影响程度,并完成模拟现场环境的验证试验,试验数据表明,该方法及其实施过程符合直流分压器现场检测要求,对现场检测试验具有指导意义,并可为实验室检定提供参考价值。

There is no verification regulation or calibration procedures and operational procedure today for on-site testing of DC voltage divider for HVDC transmission system. This paper bases on the on site electrical environment, gives the method of self calibration for bridge resistance divider, operational procedure, notes, equipment and instrument selection and error analysis. This paper analyses the on-site influence factors on the DC voltage divider and influence degree,accomplishes the validation test in the on-site simulation environment. The testing data shows that this method and implementation process conform to the requirement of on-site testing of DC voltage divider. These results have practical meaning in the on-site testing of DC voltage divider,and can provide reference value for the laboratory test.