[논문]PV 시스템의 차동 전력 조절기 모듈용 양방향 플라이백 컨버터 설계 방법

박승빈; 김민아; 정회정; 김태원; 김예린; 정지훈

doi:10.6113/tkpe.2019.24.5.379

PV 시스템의 차동 전력 조절기 모듈용 양방향 플라이백 컨버터 설계 방법
Bidirectional Flyback Converter Design Methodology for Differential Power Processing Modules in PV Applications 원문보기

전력전자학회 논문지 = The Transactions of the Korean Institute of Power Electronics, v.24 no.5, 2019년, pp.379 - 387

박승빈 (School of Electrical & Computer Eng., UNIST) , 김민아 (School of Electrical & Computer Eng., UNIST) , 정회정 (LG Electronics) , 김태원 (Research Institute of Industrial Science and Technology) , 김예린 (Department of Electrical Engineering., NTU) , 정지훈 (School of Electrical & Computer Eng., UNIST)

Abstract ▼ AI-Helper

A bidirectional flyback converter is a suitable topology for use in a PV-to-bus differential power processing (DPP) module for PV applications due to its electrical isolation capability, bidirectional power transfer, high step-up ratio, and simple circuit structure. However, the bidirectional flyback converter design should consider the effect of the output-side power switch utilized for bidirectional operation compared with that of the conventional flyback converter. This study presents the structure and design methodology of the bidirectional flyback converter for a PV DPP module. Magnetizing inductance is designed by calculating the power loss of converter components within the rated load range under the discontinuous conduction mode, which is unaffected by the reverse recovery characteristics of the anti-parallel diode of the output-side power switch. The validity of the proposed design methodology is verified using a 25 W bidirectional flyback converter prototype. The operational principles and the performance of the DPP operation are verified using practical DPP modules consisting of bidirectional flyback converters implemented according to the proposed design methodology.

주제어

표/그림 (15)

그림 Fig. 1. Configuration of PV-to-bus differential power processing (DPP) modules.
그림 Fig. 3. Schematic of bidirectional flyback converter.
그림 Fig. 2. Operating example of DPP.
그림 Fig. 4. Theoretical waveforms of input switch’s drain current. (a) Continuous conduction mode, (b) Discontinuous conduction mode.
그림 Fig. 5. Power loss analysis curves according to magnetizing inductance under DCM. (a) Forward operation, (b) Backward operation.
표 TABLE I BIDIRECTIONAL FLYBACK LOSS ANALYSIS
그림 Fig. 6. Experimental waveforms of the theoretical magnetizing inductance.
그림 Fig. 7. Photographs of converter experiments. (a) Bidirectional flyback converter prototype, (b) Experimental setup.
표 TABLE II BIDIRECTIONAL FLYBACK DESIGN PARAMETERS
그림 Fig. 9. Power conversion efficiency.
그림 Fig. 8. Experimental waveforms. (a) Forward operation, (b) Backward operation.
그림 Fig. 10. Photograph of differential power processing module prototype.
그림 Fig. 11. Measured P-V curves by experimental results. (a) Series-connected system, (b) DPP system.
그림 Fig. 12. The power flow at the maximum power point of the DPP system experimental result.
표 TABLE III SERIES AND DPP EXPERIMENTAL RESULTS AT MPP OPERATION

참고문헌 (10)

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상세보기
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상세보기
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원문보기 상세보기
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