A simulation model for propagation of partial discharge pulses in transformers

Partial discharge (PD) measurement is widely accepted as a quality control test for power transformers due to its ability to detect incipient insulation faults. For further development of PD testing as a diagnostic tool, it is important to study the propagation of PD pulses in transformers. A general simulation model is necessary which should include the different construction of transformer windings. In this paper, a simulation model is introduced which is constructed in the frequency domain and which takes account of the frequency dependent characteristics of transformer windings. A description of parameter calculation methods and system solutions is given. Some simulation results are presented. The promising application of this model in the simulation study of PD´s in power transformers is outlined