Based on Simple Four Conductors Model Measuring Distributed Parameters of 500kV Power Transformer Winding

摘要

To analyze the propagation characteristic of high frequency signals, such as partial discharge (PD) in power transformer winding, it is necessary to determine the distributed parameters at high frequency of the power transformer winding. This paper discusses an experimental method for measuring the distributed parameters of the power transformer winding. The proposed experimental method only involves the input impedance measurements for the short- and open-circuit tests and then, the distributed parameters can be computed by formula. At last, the finite element method is used to compute the capacitance parameters of the power transformer winding. It indicates that the relative error between the calculational results and the experimental results is less than 20 percent. Thus the experimental method presented in this paper is demonstrated to be effective.