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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
- 2,119 - 2,128 (10page)
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초록· 키워드
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Due to detection and control errors, some high-frequency harmonics with voltage-source characteristics cause circulating currents in modular inverters. Moreover, the circulating currents are usually affected by the output filters (OF) of each module due to their filter and resonance properties. The interaction among the circulating currents in the modules increase the power loss and reduce system stability and control precision. Therefore, this paper reports the results of a study on the SPWM high-frequency harmonics circulating currents for a double-module VSI. In the paper, an analysis of the circulating-current circuits is briefly described. Next, a mathematic model of the single-module output voltage based on the carrier frequency of SPWM is built. On this basis, through mathematic modeling of high-frequency harmonic circulating currents, the formation mechanism and distribution characteristics of circular currents and their influences are studied in detail. Finally, the influences of the OF on the circulating currents are studied by mainly taking an LC-type filter as an example. A theoretical analysis and experimental results demonstrate some important characteristics. First, the carrier phase shifting of the SPWM for each module is the major cause of the SPWM harmonic circulating currents, and the circulating currents are in an odd distribution around n-times the carrier frequency nω<SUB>s</SUB>, where n = 1, 2, 3, …. Second, the harmonic circular currents do not flow into the parallel system. Third, the OF can effectively suppress the non-circulating part of the high-frequency harmonic currents but is ineffective for the circulation part, and actually reduces system stability.
목차
Abstract
Ⅰ. INTRODUCTION
Ⅱ. HIGH-FREQUENCY SWITCHING CIRCULATING-CURRENT CIRCUITS
Ⅲ. MATHEMATICAL MODELING OF THE OUTPUT PHASE VOLTAGE OF THE INVERTER MODULE BASED ON THE SPWM CARRIER FREQUENCY
Ⅳ. THE SPWM HIGH-FREQUENCY CIRCULATING CURRENT CHARACTERISTICS OF PARALLEL SYSTEMS
Ⅴ. INFLUENCES OF AN OF ON THE CIRCULATING CURRENTS
Ⅵ. EXPERIMENTAL RESULTS
Ⅶ. CONCLUSIONS
REFERENCES
참고문헌 (17)
참고문헌 신청
[학술대회논문] - K. Ilves / 2012 / Circulating current control in modular multilevel converters with fundamental switching frequency / 7th International Power Electronics and Motion Control Conference (IPEMC) : 249 ~ 256
[학술대회논문] - Y. Zhang / 2006 / The restrain of harmonic circulating currents between parallel inverters / CES/IEEE 5th International Power Electronics and Motion Control Conference (IPEMC) : 1 ~ 5
[학술지(정기간행물)] - J. A. P. Lopes / 2006 / Defining control strategies for microgrid island operation / IEEE Trans. Power Syst 21 (2) : 916 ~ 924
[학술지(정기간행물)] - Y. A. R. I. Mohamed / 2008 / Adaptive decentralized droop controller to preserve power sharing stability of paralleled inverters in distributed generation microgrids / IEEE Trans. Power Electron 23 (6) : 2806 ~ 2816
[학술지(정기간행물)] - Z. He / 2008 / Distributed control for UPS modules in parallel operation with rms voltage regulation / IEEE Trans. Ind. Electron 55 (8) : 2860 ~ 2869
[학술대회논문] - Y. Zhang / 2006 / The restrain of harmonic circulating currents between parallel inverters / CES/IEEE 5th International Power Electronics and Motion Control Conference (IPEMC) : 1 ~ 5
[학술지(정기간행물)] - J. A. P. Lopes / 2006 / Defining control strategies for microgrid island operation / IEEE Trans. Power Syst 21 (2) : 916 ~ 924
[학술지(정기간행물)] - Y. A. R. I. Mohamed / 2008 / Adaptive decentralized droop controller to preserve power sharing stability of paralleled inverters in distributed generation microgrids / IEEE Trans. Power Electron 23 (6) : 2806 ~ 2816
[학술지(정기간행물)] - Z. He / 2008 / Distributed control for UPS modules in parallel operation with rms voltage regulation / IEEE Trans. Ind. Electron 55 (8) : 2860 ~ 2869
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UCI(KEPA) : I410-ECN-0101-2017-560-001586069