750 kV电容式电压互感器现场检验系统的研究

针对目前750 kV电容式电压互感器(CVT)测试中传统比较测差法和"低校高"法存在的问题,研究并开发出750 kV CVT测试和检验系统。通过对750 kV CVT的工作原理、等效电路和误差组成的分析,提出了750 kV CVT空载误差、负荷误差的测试方法和测试线路,研制了30.6 kV带升压器标准电压互感器、变频电子电源和低频互感器检验仪,组成了一套完整的检验系统。通过现场试验,测试数据准确可靠,可以满足0.2级750 kV CVT量值溯源的要求,具有较高的实用和推广价值。

Research on-site verification system of 750 kV capacitire voltage transformer

The paper researches and develops 750 kV CVT testing and calibration system aiming at the problems of both the traditional measurement method and "low check high" method of 750 kV capacitive voltage transformer test.This study provides that the 750 kV CVT no-load error, load error test method and test circuit by analysis of the working principle of 750 kV CVT, equivalent circuit and error, developed standard voltage transformer with voltage booster of 30.6 kV, inverter power supply and low frequency electronic transformer calibrator,forms a complete set of calibration system, which passed the field test, and the test data is accurate and reliable.The device can meet the 0.2 class 750 kV CVT precision trace to the source, has high practical and popularization value.