互感器配置不合格所引发的计量偏差测试与电量退补问题的探讨

Measurement Deviation Test and Power Compensation Caused by Unqualified Transformer Configuration

互感器是电能计量装置的重要组成部分,其配置不符规定会产生计量偏差。针对准确度等级和二次负荷配置不合格的互感器,提出了电能计量差错观点并建议测量实负荷下的合成误差作为执行电量退补的依据,并探讨了具体的测量计算方法和电量退补方法。针对合成误差测量计算的难点,探讨了常用负载电流的计算方法及常用负载电流下误差值的线性推导,提出了实负荷测试的实回路接入法,并与常规的运行测试法进行了分析对比。

Transformer is an important part of electric energy metering device,whose unqualified configuration can produce measurement deviation. For the transformers with unqualified configuration in accuracy and secondary load,this paper emphasizes the viewpoint of power measurement deviation,suggests the composite measurement error under the real load as the basis of power compensation,and discusses the specific methods for measurement calculation and power compensation. In view of the difficulties in composite error measurement and calculation,it probes into the calculation methods for the average load current and the error linear deduction for average load current. Then the Real Circuit Access Method for real load error test is proposed and compared with the conventional Run The Test Method.