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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2018.1
- 수록면
- 212 - 224 (13page)
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초록· 키워드
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For maintaining a reliable and secure power system, this paper describes the design and implement of a single-phase grid-connected inverter with an enhanced phase-locked loop (PLL) and excellent power control performance. For designing the enhanced PLL and power regulator, a full-bridge voltage-controlled inverter (VCI) is investigated. When the grid frequency deviates from its reference values, the output frequency of the VCI is unstable with an oscillation of 2 doubling harmonics. The reason for this oscillation is analyzed mathematically. This oscillation leads to an injection of harmonics into the grid and even causes an output active power oscillation of the VCI. For eliminating the oscillation caused by a PLL, an oscillation compensation method is proposed. With the proposed method, the VCI maintains the original PLL control characteristics and improves the PLL robustness under grid frequency deviations. On the basis of the above analysis, a power regulator with the primary frequency and voltage modulation characteristics is analyzed and designed. Meanwhile, a small-signal model of the power loops is established to determine the control parameters. The VCI can accurately output target power and has primary frequency and voltage modulation characteristics that can provide active and reactive power compensation to the grid. Finally, simulation and experimental results are given to verify the idea.
목차
Abstract
I. INTRODUCTION
II. OVERVIEW OF THE VCI GRID-CONNECTED MODEL
III. DESIGN OF THE PLL AND POWER REGULATOR
IV. SIMULATION AND EXPERIMENTAL VERIFICATION
V. CONCLUSIONS
REFERENCES
참고문헌 (26)
참고문헌 신청
F. Blaabjerg, R. Teodorescu, M. Liserre, and A. Timbus, “Overview of control and grid synchronization for distributed power generation systems,” IEEE Trans. Ind. Electron., Vol. 53, No. 5, pp. 1398-1409, Oct. 2006.
D. Zhi, L. Xu, and B. W. Williams, “Improved direct power control of grid-connected dc/ac converters,” IEEE Trans. Power Electron., Vol. 24, No. 5, pp. 1280-1292, May 2009.
H. M. Kojabadi, B. Yu, I. A. Gadoura, L.-C. Chang, and M. Ghribi, “A novel DSP-based current-controlled PWM strategy for single phase grid connected inverters,” IEEE Trans. Power Electron., Vol. 21, No. 4, pp. 985-993, July 2006.
F. Blaabjerg, Z. Chen, and S. Kjaer, “Power electronics as efficient interface in dispersed power generation systems,” IEEE Trans. Power Electron., Vol. 19, No. 5, pp. 1184-1194, Sep. 2004.
L. Zhang, L. Harnefors, and H. P. Nee, “Powersynchronization control of grid-connected voltage-source converters,” IEEE Trans. Power Syst., Vol. 25, No. 2, pp. 809-820, May 2010.
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