Reliability Evaluation and Optimization of Capacitor Bank

Haoran Wang, Huai Wang

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

4 Citations (Scopus)


Capacitors are widely used in power electronic converters to buffer the pulsation power, filter the harmonics and support voltage for stable operation. For these applications where single capacitor can not fulfill the voltage rating or capacitance requirements, capacitor bank is always used as the energy buffer by connecting several capacitors in parallel for larger capacitance, or in series for higher voltage rating. With more stringent constrains on volume for high power density applications, the thermal coupling effect becomes more severely which accelerates a portion of cells aging, therefore, reliability should be considered into the design phase. In this paper, considering the uneven temperature distribution in an ultra-compact capacitor bank, the lifetime of each cell is estimated at the beginning to reveal the reliability issue. Aiming to extend the lifetime of the capacitor bank with cost constraint, optimization solutions are proposed from the two aspects: rated lifetime allocation, and thermal loading distribution of each cell which are the significant factors to the lifetime. Simulation and experiment are conducted to verify the accuracy of the proposed solutions.
Original languageEnglish
Title of host publicationProceedings of the 2018 IEEE Energy Conversion Congress and Exposition (ECCE)
Number of pages5
PublisherIEEE Press
Publication dateSep 2018
ISBN (Print)978-1-4799-7313-2
ISBN (Electronic)978-1-4799-7312-5
Publication statusPublished - Sep 2018
Event10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018 - Portland, United States
Duration: 23 Sep 201827 Sep 2018


Conference10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018
CountryUnited States
SponsorIEEE Industry Applications Society (IAS), IEEE Power Electronic Society (PELS)
SeriesIEEE Energy Conversion Congress and Exposition

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