高压计量箱检定系统研究

High-pressure metering box System Verification

目前,高压计量箱的误差校验方法与其实际运行状态存在显著差异,如:计量箱工作在高电压、大电流状态下而校验是分别按照单个电压、电流互感器进行;实际上工作时,电流互感器和电压互感器因电磁场的存在而相互影响、电流互感器因高电压的存在而相互影响、电压互感器因大电流磁场的影响等,这些因素导致日前校验方法得到的数据不能准确反映其实际运行状态下的误差,不能对计量箱做出真实的性能评价,对保证电能贸易结算的准确与可靠带来不同程度的问题。本文提出一种针对高压计量箱的检定系统,采用三相法准确地模拟试品在现场运行状态下的实际误差,测得的数据真实、可靠。

At present, there are significant differences, error checking method of high voltage metering box and the actual run ning state such as： metering box working at high voltage, high current state and check is respectively according to the single voltage, current transformer; actually work, current transformer and potential transformer for electromagnetic field and influence each other, current because of the existence of the high voltage transformer and influence each other, voltage transformer for high current mag netic influence, these factors lead to a calibration method for the data obtained can not accurately reflect the actual operation condi tion of error, the performance evaluation can not be on the metering box make real, to ensure power trade settlement of accurate and reliable bring different problems. This paper proposes a high voltage metering box verification system, accurate simulation of the ac tual error in sample site operation condition of the threephase method, the measured data is true, reliable.