Error calibration of extra-high voltage electromagnetic standard voltage transformers

摘要

In order to solve the error calibration,quantity transfer and traceability of the 1000kV extra-high electromagnetic standard voltage transformers,a test method is presented in this paper,which confirms the error of 1000kV standard voltage transformer by measuring the primary no-load admittance of the standard voltage transformer and calibrating the high-voltage device with the low-voltage one.The quantity transfer of extra-high electromagnetic standard transformer can be largely solved by using this test method.The practicability and validity of this method is verified by a large amount of test data.