Voltage and Current Programmed Modes in Control of the Z-Source Converter

Gökhan Sen, Malik Elbuluk

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The Z-source converter (ZSC) is an alternative power conversion topology that can both buck and boost the input voltage with improved reliability. Dynamic modeling of the ZSC from different perspectives has been studied. Based on these models, the dc-link voltage is controlled using direct measurement or measurement of the capacitor voltage. In this paper, two methods of dc-link voltage control of ZSC are analyzed and compared. Both methods are based on measuring the input voltage and the capacitor voltage to estimate the peak of the dc link voltage. Compensator for both voltage mode (VM) and current programmed mode (CPM) controls were designed based on the state space averaged signal model of the ZSC with inductive loading. In CPM, since the order of the system is reduced by one, it is possible to achieve similar dynamic performance with a simpler compensator. Performance of both control methods of the compensated ZSC are verified by simulation and experimental results for input and load disturbances.
Keyword: Z-source converter,Voltage mode,Current programmed mode,Boost control
Original languageEnglish
Title of host publicationProceedings of IEEE Industry Applications Society Annual Meeting
Publication date2008
ISBN (Print)978-1-4244-2278-4
Publication statusPublished - 2008
Externally publishedYes
Event2008 IEEE Industry Applications Society Annual Meeting - Edmonton, Canada
Duration: 5 Oct 20089 Oct 2008


Conference2008 IEEE Industry Applications Society Annual Meeting
Internet address


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