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Accelerated Insulation Aging Due to Fast Repetitive Voltages A Review Identifying Challenges and Future Research Needs

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Document pages: 11 pages

Abstract: Although the adverse effects of using power electronic conversion on theinsulation systems used in different apparatuses have been investigated, theyare limited to low slew rates and repetitions. These results cannot be used fornext-generation wide bandgap (WBG) based conversion systems targeted to be fast(with a slew rate up to 100 kV us) and operate at a high switching frequency upto 500 kHz. Frequency and slew rate are two of the most important factors of avoltage pulse, influencing the level of degradation of the insulation systemsthat are exposed to such voltage pulses. The paper reviews challengesconcerning insulation degradation when benefitting from WBG-based conversionsystems with the mentioned slew rate and switching frequency values andidentifies technical gaps and future research needs. The paper provides aframework for future research in dielectrics and electrical insulation designfor systems under fast, repetitive voltage pluses originated by WBG-basedconversion systems.

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