Construction and Verification of Novel Insulation Defect Location System with High Space Resolution for Next Generation Power Module

This paper reports on construction and verification of a high space resolution partial discharge (PD) location system for the next generation power module. A novel PD location method (polarity reversion method) is proposed by calculating electromagnetic wave (EMW) propagation characteristics inside the power module using finite difference time domain (FDTD) analysis. In addition, EMW signal characteristics under AC voltage and impulse voltage application are compared. Based on these results, an automatic PD location system has been successfully constructed under the impulse voltage application.