10kV带电作业工具耐压试验用的变压器容升电压误差探讨  

Discussion on the Capacitance-rised Voltage Error of the Transformer Used in Voltage Withstand Test of 10kV Live Working Tools

作　　者：田树军 郭金明 俸波 TIAN Shujun;GUO Jinming;FENG Bo(Electric Power Research Institute of Guangxi Power Grid Co.,Ltd.,Guangxi Nanning 530023,China)

机构地区：[1]广西电网有限责任公司电力科学研究院

出　　处：《广西电力》2019年第6期45-47,52,共4页Guangxi Electric Power

摘　　要：对10 kV带电作业工具耐压试验用的变压器容升电压误差问题进行探讨。首先,综合工频高压实验装置、仪器仪表误差要求,指出试验变压器最大允许容升电压误差应不大于1.5%,并分别计算出10 kVA和50 kVA试验变压器在该容升电压误差下对应的被试品电容临界值;然后,测量了常用单件10 kV带电作业工具在工频耐压试验时的等值电容量,根据实际工作中单件或者多件10 kV带电作业工具工频试验时的等值电容量,分别计算了10 kVA和50 kVA试验变压器耐压试验时实际输出电压的容升电压误差;最后,为了减少试验变压器容升电压误差,给出了10 kV带电作业工具耐压试验时试验变压器的容量选择建议。The capacitance-rised voltage error of the transformers used in voltage withstand tests of 10 kV live working tools is discussed. Firstly, it is pointed out that the maximum permissible capacitance-rised voltage error of the testing transformers should be less than 1.5% based on the comprehensive consideration of the error requirements of power frequency high voltage testing equipment and devices, and the corresponding critical capacitance values of the tested objects for the 10 kVA testing transformer and the 50 kVA testing transformer under that capacitance-rised voltage error are calculated respectively. Then, the equivalent capacitance of the common single 10 kV live working tool in the power-frequency voltage withstand test is measured and the capacitance-rised voltage errors of the actual output voltage under the voltage withstand test by the 10 kVA testing transformer and the 50 kVA testing transformer are calculated respectively according to the equivalent capacitance of the single or multiple 10 kV live working tools during the powerfrequency test in actual work. Finally, in order to reduce the capacitance-rised voltage error of the testing transformers, suggestions on the capacity selection of the testing transformer used in the voltage withstand test of 10 kV live working tools are given.

关 键 词：带电作业工具 工频耐压 试验变压器 电容量 容升电压误差 

分 类 号：TM835[电气工程—高电压与绝缘技术]