Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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Modified-PO Method to Improve the MPPT Performance of PV System

태양광 발전의 MPPT 성능 개선을 위한 변형된 PO 방법

  • Ko, Jae-Sub (Dept. of Electrical Control Engineering, Sunchon National University) ;
  • Chung, Dong Hwa (Dept. of Electrical Control Engineering, Sunchon National University)
  • Received : 2015.07.20
  • Accepted : 2015.12.02
  • Published : 2015.12.31
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Abstract

This paper proposes the method which is improved a performance of PO MPPT control in PV system. The PO method is continually changed voltage toward direction that increases power, and if output power is decreased by changing voltage, a power of the conventional PO method is changed to a power before one step. These operations causes reduce of MPPT performance. Therefore, this paper proposes the MPPT method that can be improved the performance of the conventional PO method. When voltage is changed to direction of reducing power, the method proposed in this paper is changed to the voltage the opposite direction of twice step size. The MPPT performance of proposed method in this paper is compared with conventional PO method and proved the validity of this paper using these results.

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References

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