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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
- 2018.11
- 수록면
- 1,780 - 1,790 (11page)
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초록· 키워드
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Voltage feed-forward control (VFFC) is widely used in LCL-type grid-tied inverters due to its advantages in terms of disturbance rejection performance and fast dynamic response. However, VFFC may worsen the stability of inverters under weak grid conditions. It is revealed in this paper that a large phase-lag in the low-frequency range is introduced by VFFC, which reduces the phase margin significantly and leads to instability. To address this problem, a novel virtual-impedance-based control, where a phase-lead is introduced into the low-frequency area to compensate for the phase lag caused by VFFC, is proposed to improve system stability. The proposed control is realized with a high-pass filter, without high-order-derivative components. It features easy implementation and good noise immunity. A detailed design procedure for the virtual impedance control is presented. Both theoretical analysis and experimental results verify the effectiveness of the control proposed.
목차
Abstract
I. INTRODUCTION
II. STABILITY ANALYSIS ON AN INVERTER WITH VFFC
III. PROPOSED HIGH-PASS-FILTER-BASED VIRTUAL IMPEDANCE CONTROL
IV. SIMULATION AND EXPERIMENTAL RESULTS
V. CONCLUSIONS
REFERENCES
참고문헌 (25)
참고문헌 신청
X. Guo, W. Liu, and Z. Lu, “Flexible poweregulat ion and current-limited control of grid-connected inverter under unbalanced grid voltage faults,” IEEE Trans. Ind. Electron., Vol. 64, No. 9, pp. 7425-7432, Sep. 2017.
X. Guo and X. Jia, “Hardware-based cascaded topology and modulation strategy with leakage current reduction for transformerless PV systems,” IEEE Trans. Ind. Electron., Vol. 62, No. 12, pp. 7823-7832, Dec. 2016.
F. Blaabjerg, R. Teodorescu, M. Liserre, and A. V. 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.
M. Liserre, R. Teodorescu, and F. Blaabjerg, “Stability of photovoltaic and wind turbine grid-connected inverters for a large set of grid impedance values,” IEEE Trans. Power Electron., Vol. 21, No. 1, pp. 263-272, Jan. 2006.
J. B. Kwon, X. Wang, F. Blaabjerg, C. L. Bak, A. R. Wood, and N. R. Watson, “Harmonic instability analysis of a single-phase grid-connected converter using a harmonic state-space modeling method,” IEEE Trans. Ind. Appl., Vol. 52, No. 5, pp. 4188-4200, Sep./Oct. 2016.
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