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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2023.5
- 수록면
- 1,504 - 1,508 (5page)
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This paper presents a single-stage high-frequency link multi-level three-phase DC-AC converter for medium voltage grid integration of utility-scale solar park. On the DC side, three half-bridge legs are used. The converter employs three high-frequency transformers with multi-winding secondaries to provide galvanic isolation between the DC and AC sides. The output of each secondary winding is fed to an active rectifier followed by a full-bridge-based unfolder circuit to generate the line frequency AC. The rectifier-unfolder stages are then connected in cascade to build the medium voltage AC before connecting to the MV utility grid through line filters. The modulation strategy ensures zero-voltage switching of the DC side half-bridge legs throughout the line cycle. For DC-AC power flow, the secondary active rectifiers are soft-switched, and the unfolder circuits are line frequency switched, thus incurring negligible switching loss. The converter avoids using a bulky interstage DC-link filter capacitor. The operation of the converter is verified in MATLAB simulation, and critical simulation results are given in the paper.
목차
Abstract
I. INTRODUCTION
II. PROPOSED TOPOLOGY
III. MODULATION STRATEGY
IV. RESULTS AND DISCUSSION
V. CONCLUSION
REFERENCES
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