CAJ | 학술논문

就CVT补偿电抗器限压MOA对CVT介损测试的影响进行分析，得出相关结论： MOA支路的存在会使CVT总电容介损测试结果偏小，严重时会出现负介损的情况。造成该现象的原因是限压MOA支路的存在改变了流入测试电桥Cx端的电流相位。这种由MOA支路引起的测量误差无法通过提高测试电压的方法消除，而且由于MOA器件的非线性伏安特性，提高测试电压还会导致误差不减反增。为了保证CVT整组电容介损测试结果的准确性，建议在测试时拆除限压MOA。
취CVT보상전항기한압MOA대CVT개손측시적영향진행분석，득출상관결론： MOA지로적존재회사CVT총전용개손측시결과편소，엄중시회출현부개손적정황。조성해현상적원인시한압MOA지로적존재개변료류입측시전교Cx단적전류상위。저충유MOA지로인기적측량오차무법통과제고측시전압적방법소제，이차유우MOA기건적비선성복안특성，제고측시전압환회도치오차불감반증。위료보증CVT정조전용개손측시결과적준학성，건의재측시시탁제한압MOA。
The paper analyzes effect of protective MOA of compensation reactor on dielectric loss test of CVT and draws a conclusion as follow:MOA branch makes the value of dielectric loss test of CVT smaller than the true value; what's worse, dielectric loss will be negative in severe cases. The reason of this condition is that the phase of signal current flowing in Cx terminal of electric bridge is changed by protective MOA branch. Such measurement error caused by MOA branch cannot be eliminated by rising up test voltage; in addition, the error may become larger by test voltage rise because of the nonlinear current voltage characteristics of MOA parts. To ensure that the test dielectric loss test result of the entire reactor bank is accurate, it is sug-gested to remove the protective MOA during dielectric loss test of CVT.