Consideration of Space Charge Measurement on Metal-Polymer Laminate Materials

Polymer, common insulating material, can be used with the metal layer. In order to investigate the reliability of its insulation performance, it is important to measure space charge by the pulsed electro-acoustic (PEA) method. However, it is difficult to measure space charge correctly because of the acoustic characteristic difference between the polymer and the metal layer. Therefore, we have proposed the numerical analysis model on PEA method for generation and propagation of acoustic wave in order to discuss the error factors in space charge measurement. In this paper, the results from the numerical analysis on the metal-polymer laminate material have proved that the metal material could have some influences on the results of space charge measurement.