自愈光学电流互感器现场运行稳定性试验

从互感器误差校验、电能计量统计和电能计量系统整体校验3个方面对光学电流互感器的现场运行性能进行客观评价。投运前和运行中期的误差校验数据显示,变差小于0.1%,满足0.2S级要求。建立2套独立计量系统,在实际现场运行条件下进行长期数据比对,反映数字电能计量系统在各种环境因素影响下的长期运行稳定性。通过对数字电能计量系统的整体校验,在额定功率条件下不确定度达到9.0×10-5,置信概率达到97.15%,系统综合误差为1.013%,满足规程要求。

Experiment on site operational stability of optical current transformer

The site operational performances of optical current transformer are evaluated in error calibration,energy measurement statistics and metering system overall calibration.The error calibration data before and during site operation show the error change is less than 0.1 %,satisfying the requirement of class 0.2S.Two independent measuring systems are established for the long-term comparison of site operational data to demonstrate the long-term operating stability of digital energy metering system under various environmental conditions.The overall calibration data of digital energy metering system indicate that,at rated power,the uncertainty is 9.0 × 10-5,the confidence probability is 97.15 % and the system comprehensive error is 1.013 %,satisfying the requirements of codes.