Development of calibration system for electronic transformer with digital output
Huang Mei · Power System Protection and Control · 2010
Making accurate measurement and calibration of electronic transformer provides an important guarantee for the security and stable operation of digital substation.A new calibration method which meets the requirements of digital output of electronic transformer is presented in order to solve existent problems of actual calibration course.The measurement method based on the combined principles of the quasi-synchronous algorithm and Discrete Fourier Translation(DFT) is introduced and its realization is also discussed.This measurement method can effectively restrain the impact of grid frequency fluctuation on the accuracy of calibration results.At last,the realization process of new calibration method and its simulation results are achieved,which show that the performance and accuracy of new calibration system are satisfied.