高准确度标准电压互感器误差电压系数测量方法  

Method to Determine the Errors Voltage Coefficient of Standard Voltage Instrument Transformer With High Accuracy

作　　者：周峰[1] 殷小东 姜春阳 雷民 林福昌[1] ZHOU Feng;YIN Xiaodong;JIANG Chunyang;LEI Min;LIN Fuchang(Huazhong University of Science and Technology,Wuhan 430074,Hubei Province,China;Wuhan University,Wuhan 430072,Hubei Province,China;China Electric Power Research Institute,Wuhan 430074,Hubei Province,China)

机构地区：[1]华中科技大学,湖北省武汉市430074 [2]武汉大学,湖北省武汉市430072 [3]中国电力科学研究院有限公司,湖北省武汉市430074

出　　处：《中国电机工程学报》2019年第24期7421-7428,共8页Proceedings of the CSEE

摘　　要：为实现电磁式标准电压互感器高准确度自校准溯源,提出一种可用于电压比例标准误差电压系数的测量方法,使用2台辅助标准电压互感器,通过三步测量即可得到被测电压互感器的不同电压下的误差变化量。通过与传统误差电压系数测量方法相比以及国际比对,验证了该方法的可行性和测量结果不确定度评定的合理性,110kV标准电压互感器的自校准比差测量不确定优于5×10?6,角差测量不确定优于5?rad。应用该方法可完成最高至1000kV工频电压比例标准装置的溯源,具有准确度高、稳定性强的特点。To finish the self-calibration of standard voltage instrument transformer with high accuracy, improvements in the method of determining voltage instrument transformer errors were described in this paper. Two auxiliary instrument transformers were used in series and separately to test the standard voltage instrument transformer under test on the voltage of U and 2 U to measure the errors variation between these two voltages. The results of the comparison with the traditional method and international comparison show that the measurement uncertainty of the method were reasonable. The measurement uncertainty of 110 kV voltage ratio standard is below 5×10?6 for ratio error, and 5?rad for phase shifts. The method could be used to calibrate the ratio standard up to 1000 kV with high accuracy and stability.

关 键 词：电压互感器 误差 电压系数 谐波 

分 类 号：TM933.21[电气工程—电力电子与电力传动]