分析了1000 kV CVT运行状态下进行误差测试的必要性.讨论了温度的变化、频率、邻近带电体和二次负载等因素对CVT误差的影响.对比了1000 kV CVT在出厂试验、交接试验和在线运行时的接线差异.在此基础上提出1000 kV CVT运行状态下误差测量的原则和方法,并研制出一套1000 kV CVT误差在线测试系统.利用该系统完成了工程中运行状态下出线侧1000 kV CVT误差测试.本测试方法对后续的特高压工程的设计、施工、交接试验以及在线监测等都具有重要意义.%The necessary of error test for 1000 kV CVT under operation condition is analyzed. The factors influencing the CVT error such as temperature variation, frequency, adjacent charged body and the secondary load are discussed. The wiring difference of routine test, on-site acceptance test and online operation of 1000 kV CVT is compared. On this basis, the principle and the method of error measurement for 1000 kV CVT when operation are proposed and a 1000 kV CVT online error calibration system is developed. Appling the calibration system, error tests for 1000 kV CVT outlet side in engineering operation are finished. The error test provided is significant to the design, construction, on-site acceptance test, and online monitoring of subsequent UHV project.
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