Research of arithmetic in electronic transformer calibrator
Penghe Zhang · Power System Protection and Control · 2009
It is necessary for electronic instrument transformers to make calibration before putting it into practice.The theory and method of calibration technology for electronic instrument transformers are discussed in this paper based on the standard of IEC60044-7 and IEC60044-8.A new calibration method is presented in order to solve existent problem of actual calibration course.The quasi-synchronous algorithm is introduced,and the quasi-synchronous algorithm and DFT algorithm are integrated,and thus the accuracy of the calibration method influenced by the frequency vibration will be significantly improved.The experiment results of new calibration method is achieved,and it is well coincide with the testing results,It shows that the performance and efficiency of new calibration method is satisfied.It will provide the powerful theory support for the development of electronic instrument transformers.