Sensorless Feedforward Current Control of Dual-Active-Bridge DC/DC Converter for Micro-Grid Applications

Duy Dinh Nguyen, Dinh Hoa Nguyen, Minh C. Ta, Goro Fujita

    Research output: Contribution to journalArticlepeer-review

    1 Citation (Scopus)

    Abstract

    In Dual-Active-Bridge converter control system, high frequency terminal current is usually measured then fed-back to the current mode controller. However, the measurement requires wide bandwidth sensors, fast and precise operational amplifier, and high sampling rate Analog to Digital conversion. This paper proposes a Proportional Integral Observer to estimate such the current to eliminate the need of current sensors. A combined feedforward-feedback control system is then developed to enhance the system dynamics and to regulate the output voltage. The control system needs only the information of terminal voltages. Simulation and experiment results show that the observer performs fast and accurately with acceptable observation error; and the output voltage is well regulated regardless of load changes.

    Original languageEnglish
    Pages (from-to)333-338
    Number of pages6
    JournalIFAC-PapersOnLine
    Volume51
    Issue number28
    DOIs
    Publication statusPublished - 2018

    All Science Journal Classification (ASJC) codes

    • Control and Systems Engineering

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