반도체디스플레이기술학회지 (Journal of the Semiconductor & Display Technology)

한국반도체디스플레이기술학회 (The Korean Society Of Semiconductor & Display Technology)
권호 표지

계통연계형 멀티스트링 3상 3레벨 태양광 인버터의 MPPT 제어방법에 관한 연구

A Study on the MPPT Control Method for Grid-connected Multi-String Three-Phase Three-Level PV Inverter

  • 김진수 (청주대학교 전자공학과) ;
  • 양오 (청주대학교 반도체공학과)
  • Kim, Jinsoo (Electronic Engineering of Cheong-ju University) ;
  • Yang, Oh (Semiconductor Engineering of Cheong-ju University)
  • 투고 : 2014.11.28
  • 심사 : 2014.12.22
  • 발행 : 2014.12.31
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초록

Two-level inverter has some disadvantages like high harmonics contained in the output current, efficiency limit and stress to switching device as IGBT and FET. Many researches have reported multi-level inverter to complement two-level inverter of problems. In this paper, we suggest MPPT algorithm of multi-string three-level solar inverter that considered nowadays. We added midpoint controller in order to implement the MPPT algorithm because the three-level inverter has to need midpoint controller and procured the stability of direct current link. We verify the superiority of multi-string T-Type inverter and the algorithm we suggested with solar irradiance variation experiment and MPPT efficiency measurement. The MPPT efficiency was confirmed with a high efficiency more than 99.97%.

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참고문헌

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