高压电流互感器泄漏电流测量及消除方法研究

针对高压状态下泄漏电流影响标准电流互感器、无法准确地检测高压计量设备的问题,研制了一套零泄漏电流高压电能标准装置。解决了泄漏电流影响标准电流互感器准确测量问题,填补了电能标准装置泄漏电流消除领域技术空白。阐述了泄漏电流产生的原理并分析了其对电流互感器的误差影响,提出了基于互感器校验仪的泄漏电流测量方法,可实现电流互感器屏蔽和绝缘水平精准评估。实验证明所研制的零泄漏电流高压电能标准装置能消除泄漏电流,实现在模拟运行工况下对高压电能计量设备的误差检测。

Research on leakage current measurement and elimination method of high voltage current transformer

The high voltage metering equipment cannot be accurately detected, because the leakage current affects the standard current transformer under high voltage. For the problem, a set of zero leakage current high voltage electric energy standard device is developed. This device not only solves the problem that the leakage current affects the accurate measurement of the standard current transformer, but also fills the technical blank in the field of leakage current elimination of the electric energy standard device. The principle of leakage current generation is described and its influence on the error of current transformer is analyzed. A leakage current measurement method based on the transformer calibrator is proposed, which can realize accurate measurement of current transformer shielding and insulation level. Experiment shows that the developed zero leakage current high voltage electric energy standard device can eliminate leakage current and realize error detection of high-voltage electric energy measurement equipment under simulated operating conditions. This work is supported by Science and Technology Project of Stated Grid Corporation of China (No. 52182017001M).