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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2016.11
- 수록면
- 2,129 - 2,138 (10page)
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The full-bridge inverter, widely used for single-phase photovoltaic grid-connected applications, presents a leakage current issue. Therefore, an AC bypass branch is introduced to overcome this challenge. Nevertheless, existing modulation strategies entail drawbacks that should be addressed. One is the zero-crossing distortion (ZCD) of the AC current caused by neglecting the AC filter inductor voltage. Another is that the system cannot deliver reactive power because the AC bypass branch switches at the power frequency. To address these problems, this work proposes an optimized hybrid modulation strategy. To reduce ZCD, the phase angle of the inverter output voltage reference is shifted, thereby compensating for the neglected leading angle. To generate the reactive power, the interval of the negative power output is calculated using the power factor. In addition, the freewheeling switch is kept on when power is flowing into the grid and commutates at a high frequency when power is fed back to the DC side. In this manner, the dead-time insertion in the high-frequency switching area is minimized. Finally, the performances of the proposed modulation strategy and traditional strategies are compared on a universal prototype inverter. Experimental results validate the theoretical analysis.
목차
Abstract
Ⅰ. INTRODUCTION
Ⅱ. ANALYSIS OF THE EXISTING MODULATION STRATEGY
Ⅲ. PROPOSED OPTIMIZED HYBRID MODULATION STRATEGY
Ⅳ. EXPERIMENTAL RESULTS
Ⅴ. CONCLUSIONS
REFERENCES
참고문헌 (24)
참고문헌 신청
[학술지(정기간행물)] - M. Islam / 2015 / Single phase transformer less inverter topologies for grid-tied photovoltaic system : A review / Renewable and Sustainable Energy Reviews 45 : 69 ~ 86
[학술지(정기간행물)] - W. Li / 2015 / Topology review and derivation methodology of single-phase transformer less photovoltaic inverters for leakage current suppression / IEEE Trans. Ind. Electron 62 (7) : 4537 ~ 4551
[학술지(정기간행물)] - W. J. Cha / 2015 / Evaluation and analysis of transformerless photovoltaic inverter topology for efficiency improvement and reduction of leakage current / IET Power Electronics 8 (2) : 255 ~ 267
[학술지(정기간행물)] - D. Meneses / 2013 / Review and comparison of step-up transformerless topologies for photovoltaic AC-module application / IEEE Trans. Power Electron 28 (6) : 2649 ~ 2663
[학술대회논문] - Z. Özkan / 2012 / A survey and extension of high efficiency grid connected transformerless solar inverters with focus on leakage current characteristics / IEEE Energy Conversion Congress and Exposition (ECCE) : 3453 ~ 3460
[학술지(정기간행물)] - W. Li / 2015 / Topology review and derivation methodology of single-phase transformer less photovoltaic inverters for leakage current suppression / IEEE Trans. Ind. Electron 62 (7) : 4537 ~ 4551
[학술지(정기간행물)] - W. J. Cha / 2015 / Evaluation and analysis of transformerless photovoltaic inverter topology for efficiency improvement and reduction of leakage current / IET Power Electronics 8 (2) : 255 ~ 267
[학술지(정기간행물)] - D. Meneses / 2013 / Review and comparison of step-up transformerless topologies for photovoltaic AC-module application / IEEE Trans. Power Electron 28 (6) : 2649 ~ 2663
[학술대회논문] - Z. Özkan / 2012 / A survey and extension of high efficiency grid connected transformerless solar inverters with focus on leakage current characteristics / IEEE Energy Conversion Congress and Exposition (ECCE) : 3453 ~ 3460
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UCI(KEPA) : I410-ECN-0101-2017-560-001586074