Controlling the Residual Flux in Transformer to Prevent the Distortion of Short-circuit Current

단락 전류 왜형방지를 위한 변압기 잔류자속제어

The residual flux(${\psi}_r$) in transformer's iron cores cause the distortion of short-circuit current occasionally. And some considerable distortion effect on the validation of test results. To prevent this situation, there needs some suitable control of residual flux through the pretest. This paper deals with the how to control the residual flux in pretest and the comparison between the two test results which were obtained by different test method.