Treatment and Analysis on Abnormality of Rated Output Capacity Check of 220 kV CVT
In view of such issues that the rated output capacity of 30 VA of 220 kV capacitor voltage transformer(CVT)is not consistent with the design value of 50 VA,the generation and reason of the problem are introduced.Based on the error theory of the CVT,it is concluded that the accuracy and temperature rise index are strongly related to the rated output capacity of CVT,and the rated output capacity of CVT is checked through the combination of accuracy test and type test.The accuracy test is performed on the CVT one by one,and the product type test of 30 VA CVT is performed in accordance with 50 VA,with temperature rise and accuracy test in particular.The test results show that the 30 VA CVT meets the requirements of 50 VA rated output capacity.Finally,the rated output capacity parameters of the CVT nameplate are updated,and the operation is normal after the operation.This provides a solution for the rated capacity check of the CVT.
capacitor voltage transformerrated output capacityload erroraccuracytemperature rise
万方数据
维普
