电容式电压互感器暂态特性校验

Testing Calibration on Transient Characteristic of Capacitor Voltage Transformer

当电力系统中存在雷击或在操作过程时,其高频暂态过电压会以静电感应和电磁耦合的方式从高压系统传递到低压系统,这会给二次系统的测量、保护以及其他二次设备的运行造成严重的影响。在电容式电压互感器(CVT)暂态过电压传递特性试验研究和仿真模拟研究的基础上,对高频过电压在CVT中的传递做了校验和分析,并对传递特性试验和仿真过程遇到的问题做出了归纳总结,可为过电压在线监测等工作提供借鉴。

The high - frequency transient overvohage will be propagated from the primary side to the secondary side by the effect of electrostatic induction and electromagnetic coupling usually, when the lightning stroke or the circuit breaker switching occurs in power system, which has a serious influence on the operation of monitoring, protection and other secondary equip- ment in the secondary system. Based on the test and the simulation for transfer characteristic of transient overvohage in capaci- tor voltage transformer （ CVT）, the calibration and analysis for the transfer characteristic of high - frequency overvoltage in CVT are carried out. Finally, the questions during the research of transfer characteristic are summarized, which could provide a reference to overvohage measurement such as online monitoring.