지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.9
- 수록면
- 1,270 - 1,277 (8page)
이용수
초록· 키워드
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A problem with virtual synchronous generator (VSG) systems is that they are difficult to operate stably with photovoltaic (PV) power as the DC side. With this problem in mind, a PV-VSG control strategy considering the dynamic characteristics of the DC side is proposed after an in-depth analysis of the dynamic characteristics of photovoltaic power with a parallel energy-storage capacitor. The proposed PV-VSG automatically introduces DC side voltage control for the VSG when the PV enters into an unstable working interval, which avoids the phenomenon where an inverter fails to work due to a DC voltage sag. The stability of the original VSG and the proposed PV-VSG were compared by a root locus analysis. It is found that the stability of the PV-VSG is more sensitive to the inertia coefficient J than the VSG, and that a serious power oscillation may occur. According to this, a new rotor model is designed to make the inertial coefficient automatically change to adapt to the operating state. Experimental results show that the PV-VSG control strategy can achieve stable operation and maximum power output when the PV output power is insufficient.
목차
Abstract
I. INTRODUCTION
II. ANALYSIS OF THE PV-VSG STRUCTURE AND THE DYNAMIC CHARACTERISTICS OF THE DC SIDE
III. PV-VSG CONTROL STRATEGY WITH DC SIDE VOLTAGE CONTROL
IV. STABILITY ANALYSIS AND METHOD IMPROVEMENT
V. EXPERIMENTAL VERIFICATION
VI. CONCLUSION
REFERENCES
참고문헌 (20)
참고문헌 신청
M. Guan, W. Pan, J. Zhang, Q. Hao, J. Cheng, and X. Zheng, “Synchronous generator emulation control strategy for voltage source converter (VSC) stations,” IEEE Trans. Power Syst., Vol. 30, No. 6, pp. 3093-3101, Nov. 2015.
Q. Zhong and G. Weiss, “Synchronverters: Inverters that mimic synchronous generators,” IEEE Trans. Ind. Electron., Vol. 58, No. 4, pp. 1259-1267, Apr. 2011.
J. Alipoor, Y. Miura, and T. Ise, “Stability assessment and optimization methods for microgrid with multiple VSG units,” IEEE Trans Smart Grid, Vol. 9, No. 2, pp. 1462-1471, Mar. 2018.
Q. Zhong, P. L. Nguyen, Z. Ma, and W. Sheng, “Selfsynchronized synchronverters: Inverters without a dedicated synchronization unit,” IEEE Trans. Power Electron., Vol. 29, No. 2, pp. 617-630, Feb. 2014.
J. Fang, Y. Tang, H. Li, and X. Li, “A battery/ ultracapacitor hybrid energy storage system for implementing the power management of virtual synchronous generators,” IEEE Trans. Power Electron., Vol. 33, No. 4, pp. 2820-2824, Apr. 2017.
Q. Zhong and G. Weiss, “Synchronverters: Inverters that mimic synchronous generators,” IEEE Trans. Ind. Electron., Vol. 58, No. 4, pp. 1259-1267, Apr. 2011.
J. Alipoor, Y. Miura, and T. Ise, “Stability assessment and optimization methods for microgrid with multiple VSG units,” IEEE Trans Smart Grid, Vol. 9, No. 2, pp. 1462-1471, Mar. 2018.
Q. Zhong, P. L. Nguyen, Z. Ma, and W. Sheng, “Selfsynchronized synchronverters: Inverters without a dedicated synchronization unit,” IEEE Trans. Power Electron., Vol. 29, No. 2, pp. 617-630, Feb. 2014.
J. Fang, Y. Tang, H. Li, and X. Li, “A battery/ ultracapacitor hybrid energy storage system for implementing the power management of virtual synchronous generators,” IEEE Trans. Power Electron., Vol. 33, No. 4, pp. 2820-2824, Apr. 2017.
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