건축도시공간연구소

Architecture & Urban Research Institute

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전력전자학회|논문지 2021년 6월

논문명 태양광 발전 시스템용 3-레벨 부스트 컨버터 제어기 설계에 관한 연구 / A Study on the Controller Design of the Three-Level Boost Converter for Photovoltaic Power Conditioning System
저자명 이규민 ; 김일송
발행사 전력전자학회
수록사항 전력전자학회 논문지, Vol.26 No.3 (2021-06)
페이지 시작페이지(227) 총페이지(10)
ISSN 1229-2214
주제분류 환경및설비
주제어 ; Three-level boost converter modeling; TLB converter unified modeling; Photovoltaic PCS; Solar TLB converter
요약2 This research proposes a modeling and controller design of a three-level boost (TLB) converter for the implementation of maximum power point tracking (MPPT) in the photovoltaic power conditioning system (PCS). Contrary to the output voltage control of the conventional controller, the Photovoltaic PCS requires an input voltage controller for MPPT operation. A TLB converter has the advantage of decreasing the inductor size and increasing efficiency compared with the existing booster converter. However, an optimal controller is difficult to design due to the complexity of the TLB operations, which have two operational modes on the duty ratio boundary of 0.5. Therefore, the unified linear model equations of the TLB converters, which can be applicable to both operational modes, are derived using linearized solar cell expressions. Furthermore, the transfer functions are obtained for the controller design. The MPPT voltage controller is designed using MATLAB SISOTOOL. In addition, a controller for capacitor voltage unbalancing is described and designed. The simulations and experimental verifications are conducted to verify the effectiveness of the small-signal analysis and control system design.
소장처 전력전자학회
언어 한국어
DOI 10.6113/TKPE.2021.26.3.227