An FPGA Kalman-MPPT implementation adapted in SST-based dual active bridge converters for DC microgrids systems

Becerra-Nuñez, Guillermo and Castillo-Atoche, Alejandro and Vazquez-Castillo, Javier and Datta, Asim and Quijano-Cetina, Renan and Peña-Alzola, Rafael and Carrasco-Alvarez, Roberto and Osorio-de-la-Rosa, Edith (2020) An FPGA Kalman-MPPT implementation adapted in SST-based dual active bridge converters for DC microgrids systems. IEEE Access, 8. pp. 202946-202957. ISSN 2169-3536 (https://doi.org/10.1109/ACCESS.2020.3033718)

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Abstract

The design of digital hardware controllers for the integration of renewable energy sources in DC microgrids is a research topic of interest. In this paper, a Kalman filter-based maximum power point tracking algorithm is implemented in an FPGA and adapted in a dual active bridge (DAB) converter topology for DC microgrids. This approach uses the Hardware/Software (HW/SW) co-design paradigm in combination with a pipelined piecewise polynomial approximation design of the Kalman-maximum power point tracking (MPPT) algorithm instead of traditional lookup table (LUT)-based methods. Experimental results reveal a good integration of the Kalman-MPPT design with the DAB-based converter, particularly during irradiation and temperature variations due to changes in weather conditions, as well as a good balanced hardware design in complexity and area-time performance compared to other state-of-art FPGA designs.

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