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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2019.5
- 수록면
- 2,660 - 2,667 (8page)
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초록· 키워드
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Oscillation phenomenon of grid-connected inverter can be caused due to time-varying grid impedance. Terminal output impedance of inverter can be reshaped by re-tuning internal parameters of inverter to mitigate the oscillation issue. However, it’s not easy to obtain internal parameters of gridconnected inverter in practical operation. This paper presents a gray-box parameters identification method to identify the parameters of LCL filter, the proportional coefficient of current controller and capacitor-current-feedback coefficient from the measured terminal impedance frequency responses by using vector fitting algorithm. When instability phenomenon of multipleparalleled inverters system occurs, the internal parameters of each inverter are first identified by using the proposed method. Then, the capacitor-current-feedback coefficients are re-tuned to stabilize the studied power system according to the impedancebased stability criterion. The re-designed parameters for the specific grid condition can be delivered to the manufacturers for further parameters modification. Simulation results are given to validate the proposed gray-box parameter identification and corresponding impedance reshaping method.
목차
Abstract
I. INTRODUCTION
II. SYSTEM DESCRIPTION AND IMPEDANCE MODELLING
III. THE PROPOSED GRAY-BOX IMPEDANCE RESHAPING METHOD
IV. SIMULATION VERIFICATION
V. CONCLUSION
REFERENCES
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