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논문 기본 정보

자료유형
학술대회자료
저자정보
S. D. G. Jayasinghe (Nanyang Technological University) D. M. Vilathgamuwa (Nanyang Technological University) U. K. Madawala (The University of Auckland)
저널정보
전력전자학회 ICPE(ISPE)논문집 ICPE 2011-ECCE Asia
발행연도
2011.5
수록면
638 - 645 (8page)

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This paper presents a grid-side inverter based supercapacitor direct integration scheme for wind power systems. The inverter used in this study consists of a conventional two-level inverter and three H-bridge modules. Three supercapacitor banks are directly connected to the dc-links of H-bridge modules. This approach eliminates the need for interfacing dc-dc converters and thus considerably improves the overall efficiency. However, for the maximum utilization of supercapacitors their voltages should be allowed to vary. As a result of this variable voltage space vectors of the hybrid inverter get distributed unevenly. To handle this issue, a modified PWM method and a space vector modulation method are proposed and they can generate undistorted current even in the presence of unevenly distributed space vectors. A supercapacitor voltage balancing method is also presented in this paper. Simulation results are presented to validate the efficacy of the proposed scheme, modulation methods and control techniques.

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Abstract
Ⅰ. INTRODUCTION
Ⅱ. EFFECTS OF VARIABLE VOLTAGES
Ⅲ. MODULATION STRATEGIES
Ⅳ. SUPERCAPACITOR VOLTAGE BALANCING
Ⅴ. SIMULATION RESULTS
Ⅵ. CONCLUSIONS
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