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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2015.6
- 수록면
- 2,369 - 2,375 (7page)
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초록· 키워드
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With the rapid penetration of photovoltaic (PV) grid-connected system in industrial and commercial application, it is critical to improve the efficiency and enhance the utilization of PV power generation system. This paper proposes a flexible five-level topology based on cascaded multi-level inverter for PV grid-connected system. By adding a bidirectional switch to conventional multi-level inverter, the proposed topology transforms operating mode between two-level H-bridge inverter (HBI) and cascaded multilevel inverter (CMI) according to the variation of DC link voltage. When output voltages of PV arrays are lower, the proposed inverter works in CMI mode to widen the generation range. When output voltages of PV panels are higher, inverter works in HBI mode to increase the efficiency. Hence the system incorporate the low losses feature of HBI and low grid-connected current THD advantages of CMI. This way, a wide range output voltage operation with high efficiency can be achieved without extra DC-DC converter. Experimental results of the proposed five-level CMI are presented to validate the feasibility of the proposed topology.
목차
Abstract
I. INTRODUCTION
II. PROPOSED FIVE-LEVEL CASCADED H-BRIDGE INVERTER
III. LOSSES ANALYSIS
IV. EXPERIMENTAL RESULTS
V. CONCLUSION
REFERENCES
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