Reliability assessment of hybrid capacitor bank using electrolytic- and film-capacitors in three-level neutral-Point-clamped inverters

Mengxing Chen, Haoran Wang, Huai Wang, Frede Blaabjerg, Xiongfei Wang, Donghua Pan

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    11 Scopus citations

    Abstract

    Hybrid capacitor banks using electrolytic capacitors (E-Caps) and film capacitors (F-Caps) provide a cost-effective solution for DC links. However, the hybrid ratio between two types of capacitors is mostly experience based. This paper studies the quantitative solution to size the hybrid ratio for capacitor banks from a reliability point of view. Considering the parasitic parameters and thermal inertia of individual capacitors in a bank, an analytical model to obtain the electro-thermal performance for the individual type of capacitor is proposed. The quantitative relationship between the hybrid ratio and capacitor-bank reliability is acquired by applying a mission profile based reliability analysis. In addition, a DC-link capacitor bank in three-level neutral-point-clamped inverter is designed and implemented to validate the accuracy of the proposed method.

    Original languageBritish English
    Title of host publication34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages2826-2832
    Number of pages7
    ISBN (Electronic)9781538683309
    DOIs
    StatePublished - 24 May 2019
    Event34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019 - Anaheim, United States
    Duration: 17 Mar 201921 Mar 2019

    Publication series

    NameConference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
    Volume2019-March

    Conference

    Conference34th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2019
    Country/TerritoryUnited States
    CityAnaheim
    Period17/03/1921/03/19

    Keywords

    • Electro-thermal model
    • Hybrid capacitor bank
    • Mission profile
    • Reliability assessment
    • Three-level neutral-point-clamped (3L-NPC) inverter

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