The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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Maximum Power Point Tracking Technique of PV System for the Tracking of Open Voltage according to Solar Module of Temperature Influence

태양광 모듈 온도 영향에 따른 개방전압 추종을 위한 PV 시스템의 최대 전력 점 기법

  • Seo, Jung-Min (Dept. of Electronic and Electrical Engineering, Hankyong National University) ;
  • Lee, Woo-Cheol (Electronic and Electrical Engineering, Institute for Information Technology Convergence, Hankyong National University)
  • Received : 2020.09.28
  • Accepted : 2020.12.08
  • Published : 2021.02.20
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Abstract

The photovoltaic module has the characteristic of changing its output characteristics depending on the amount of radiation and temperature, where the arrays that connect them in series and parallel also have the same characteristics. These characteristics require the MPPT technique to find the maximum power point. Existing P&O and IncCond cannot find the global maximum power point (GMPP) for partial shading. Moreover, in the case of Improved-GMPPT and Enhanced Search-Skip-Judge-GMPPT, GMPP due to partial shading can be found, but the variation in the open voltage during temperature fluctuations will affect the operation of the Skip and will not be able to perform accurate MPPT operation. In this study, we analyzed the correlation between voltage, current, and power under solar module and array conditions. We also proposed a technique to find the maximum power point even for temperature fluctuations using not only the amount of radiation but also the temperature coefficient. The proposed control technique was verified through simulations and experiments by constructing a 2.5 kW single-phase solar power generation system.

Keywords

Acknowledgement

본 연구는 한국전력공사의 2020년 선정 기초연구개발 과제 연구비에 의해 지원되었음. (과제번호: R20XO02-37)

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