The paper has pointed out the importance of partial discharge location in transformer. The principles of multiple terminals measurement and calibration

variable voltage multiple terminals measurement

pulse polarity differentiation

and partial discharge location based on ultrasonic are sketched. Through an example

the location process and treatment method of partial discharge are analyzed. In order to locate the partial discharge more accurately

it should be made to choose different methods flexibly according to different structuer and type of the transformer

and to make cpmperhensive analysis.