Research On The DC Biased Transformers Based On The Equivalent Coupled Electric And Magnetic Circuit Method

DC bias is a big harm to transformer itself and the power system where the transformer located.For making the DC bias influence to the transformer clearly,theoretical and experimental analysis is applied to research the influence.The main contributions are as follows:The thesis makes a progress of the equivalent reluctance network method and uses it to solve the DC biased transformer's leakage magnet field;For the sake of making the DC bias clearly,the thesis use the equivalent coupled electric and magnetic circuit method to research the magnetic characters of DC biased transformers;Finally,the test is done to research the DC biased transformer and test's results verify the results of the theory.