Reduction of DC-link capacitor in case of cascade multilevel converters by means of reactive power control

Ghanshyamsinh Gohil, Huai Wang, Marco Liserre, Tamas Kerekes, Remus Teodorescu, Frede Blaabjerg

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

    20 Scopus citations

    Abstract

    A new method to selectively control the amount of dc-link voltage ripple by processing the desired reactive power by a DC/DC converter in an isolated AC/DC or AC/DC/AC system is proposed. The concept can reduce the dc-link capacitors used for balancing the input and output power and thereby limiting the voltage ripple. It allows the use of a smaller dc-link capacitor and hence a longer lifetime and at the same time high power density and low cost can be achieved. The isolated DC/DC converter is controlled to process the desired reactive power in addition to the active power. The control system to achieve this selective degree of compensation is proposed and verified by Simulations.

    Original languageBritish English
    Title of host publicationAPEC 2014 - 29th Annual IEEE Applied Power Electronics Conference and Exposition
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages231-238
    Number of pages8
    ISBN (Print)9781479923250
    DOIs
    StatePublished - 2014
    Event29th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2014 - Fort Worth, TX, United States
    Duration: 16 Mar 201420 Mar 2014

    Publication series

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

    Conference

    Conference29th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2014
    Country/TerritoryUnited States
    CityFort Worth, TX
    Period16/03/1420/03/14

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