Insulation design is important for medium voltage level, high power density power electronic equipment. This is especially true in order to achieve a high reliability and long lifetime, in conjunction with a reasonable insulation size and weight that is important for electric ship applications. Most of the weak points inside the solid insulation are located in the void or defect inside insulation, especially those near the field crowding area. An example of this is a self-made laminated bus. This paper will show how to model the actual structure and perform the electric field analysis, even with a single void. In order to reduce the stress for the insulation, several useful methods to decrease electric field crowding will be discussed. All these methods will be verified by FEA simulation. Then, a non-destructive partial discharge (PD) method to evaluate insulation will be introduced. The self-made laminated bus PD behavior under the line frequency sinusoidal and DC excitation will be captured. Later, a simple PCB coupon will be tested and its PD behavior under 60Hz sinusoidal and 60Hz unipolar square wave will be shown separately. These will somehow, demonstrate the difference between the insulation aging mechanism, especially under PWM-like excitation. However, deep understanding in how to evaluate and improve the insulation, especially as it applies to power electronics applications, needs to be explored in future work.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Insulation design and evaluation via partial discharge (PD) test for power electronics application


    Contributors:


    Publication date :

    2017-08-01


    Size :

    1304498 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Insulation system for reducing partial discharge in medium voltage power converter

    KEISTER JOSH / ABOLHASSANI MEHDI / KEISTER LYLE T | European Patent Office | 2022

    Free access


    Influence of Partial Discharge on Oil-Impregnated Insulation Pressboard Surface

    Cui, Yanjie / Peng, Ping / Cao, Pei et al. | British Library Online Contents | 2017


    Partial Discharge Characteristic of Oil-Paper Insulation under High Voltage Frequency-Variable Power Source

    Sun, Z. / Gu, C. / Zhao, X. et al. | British Library Online Contents | 2011


    Insulation isolation device for electrostatic discharge test of aircraft and design method

    WANG YONGZHONG / ZHANG XIANG / WANG RUI | European Patent Office | 2024

    Free access