Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)

The Korean Institute of Power Electronics (전력전자학회)
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A Novel Input and Output Harmonic Elimination Technique for the Single-Phase PV Inverter Systems with Maximum Power Point Tracking

최대출력추종 제어를 포함한 단상 태양광 인버터를 위한 새로운 입출력 고조파 제거법

  • Amin, Saghir (Department of Electrical Engineering, Soongsil University) ;
  • Ashraf, Muhammad Noman (Department of Electrical Engineering, Soongsil University) ;
  • Choi, Woojin (Department of Electrical Engineering, Soongsil University)
  • Published : 2019.07.02
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Abstract

This paper proposes a grid-tied photovoltaic (PV) system, consisting of Voltage-fed dual-active-bridge (DAB) dc-dc converter with single phase inverter. The proposed converter allows a small dc-link capacitor, so that system reliability can be improved by replacing electrolytic capacitors with film capacitors. The double line frequency free maximum power point tracking (MPPT) is also realized in the proposed converter by using Ripple Correlation method. First of all, to eliminate the double line frequency ripple which influence the reduction of DC source capacitance, control is developed. Then, a designing of Current control in DQ frame is analyzed and to fulfill the international harmonics standards such as IEEE 519 and P1547, $3^{rd}$ harmonic in the grid is directly compensated by the feedforward terms generated by the PR controller with the grid current in stationary frame to achieve desire Total Harmonic Distortion (THD). 5-kW PV converter and inverter module with a small dc-link film capacitor was built in the laboratory with the proposed control and MPPT algorithm. Experimental results are given to validate the converter performance.

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