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논문 기본 정보

자료유형
학술저널
저자정보
Pan Shen (University of Electronic Science and Technology of China (UESTC)) Yang Han (University of Electronic Science and Technology of China (UESTC)) Chang Lu (State Grid Henan Electric Power Company) Josep M. Guerrero (Aalborg University)
저널정보
대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.11 No.5
발행연도
2016.9
수록면
1,165 - 1,178 (14page)

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This paper presents the small-signal state-space modeling and a new multifunctional multi-loop control strategy for three-phase inverter-based islanded DG systems under unbalanced and/or nonlinear load conditions. The proposed control methodology utilizes the parallel virtual resistance (PVR)-based active damping (AD) method for the islanded DG system using an extra feedback capacitor current shaping loop in the stationary reference frame to provide an AD to suppress the resonance-peak of the LC filter and improve both steady-state and transient performances, the inner voltage and current controllers are based on an enhanced proportional resonant (PR) structure to achieve zero steady-state error, and multi-resonant harmonic compensator (MRHC) plus PR controller to prevent low-order load current harmonics to distort the output voltage. The proposed small-signal model of the islanded DG system with multi-loop control strategy in the stationary reference frame is presented. Moreover, an enhanced delay compensation (EDC) scheme based on two integrators of the discrete PR controller is presented to improve stability margins with a higher accuracy compared with the existing methods. Then, a detailed systematic controller parameters design procedure is presented. Finally, simulation and experimental results are provided to validate the effectiveness of the proposed strategy.

목차

Abstract
1. Introduction
2. Principle and Small-Signal Analysis of the Proposed Control Strategy
3. Selective Harmonic Compensation
4. Simulation and Experimental Results
5. Conclusion
References

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