A Review of the Condition Monitoring of Capacitors in Power Electronic Converters

Hammam Soliman, Huai Wang, Frede Blaabjerg

    Research output: Contribution to journalArticlepeer-review

    195 Scopus citations


    Capacitors are one type of reliability-critical components in power electronic systems. In the last two decades, many efforts in academic research have been devoted to the condition monitoring of capacitors to estimate their health status. Industry applications are demanding more reliable power electronics products with preventive maintenance. Nevertheless, most of the developed capacitor condition monitoring technologies are rarely adopted by industry due to the complexity, increased cost, and other relevant issues. An overview of the prior-Art research in this area is therefore needed to justify the required resources and the corresponding performance of each key method. It serves to provide a guideline for industry to evaluate the available solutions by technology benchmarking, as well as to advance the academic research by discussing the history development and the future opportunities. Therefore, this paper first classifies the capacitor condition monitoring methods into three categories, then the respective technology evolution in the last two decades is summarized. Finally, the state-of-The-Art research and the future opportunities targeting for industry applications are given.

    Original languageBritish English
    Article number7516557
    Pages (from-to)4976-4989
    Number of pages14
    JournalIEEE Transactions on Industry Applications
    Issue number6
    StatePublished - 1 Nov 2016


    • Capacitance estimation
    • capacitance measurement
    • capacitor health status
    • condition monitoring
    • electrolytic capacitors (E-Caps)
    • film capacitors
    • reliability


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