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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2015.9
- 수록면
- 1,286 - 1,294 (9page)
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Capacitor current feedback active damping is extensively used in grid-connected converters with an LCL filter. However, systems tends to become unstable when the digital control delay is taken into account, especially in low switching frequencies. This paper discusses this issue by deriving a discrete model with a digital control delay and by presenting the stable region of an active damping loop from high to low switching frequencies. In order to overcome the disadvantage of capacitor current feedback active damping, this paper proposes a modified approach using grid current and converter current for feedback. This can expand the stable region and provide sufficient active damping whether in high or low switching frequencies. By applying the modified approach, the active damping loop can be simplified from fourth-order into second-order, and the design of the grid current loop can be simplified. The modified approach can work well when the grid impedance varies. Both the active damping performance and the dynamic performance of the current loop are verified by simulations and experimental results.
목차
Abstract
I. INTRODUCTION
II. MODELING OF THE LCL FILTER
III. STABILITY ANALYSIS OF THE CAPACITOR CURRENT FEEDBACK ACTIVE DAMPING
IV. MODIFIED ACTIVE DAMPING APPROACH
V. SIMULATION AND EXPERIMENT RESULTS
VI. CONCLUSION
REFERENCES
참고문헌 (23)
참고문헌 신청
[학술지(정기간행물)] - F. Blaabjerg / 2006 / Overview of control and grid synchronization for distributed power generation systems / IEEE Trans. Ind. Electron. 53 (5) : 1398 ~ 1409
[학술지(정기간행물)] - K. Jalili / 2009 / Design of LCL filters of active-front-end two-level voltage-source converters / IEEE Trans. Ind. Electron. 56 (5) : 1674 ~ 1689
[학술대회논문] - T. C. Y. Wang / 2003 / Output filter design for a grid-interconnected three-phase inverter / Power Electronics Specialist Conference, 2003. PESC '03. 2003 IEEE 34th Annual 2 : 779 ~ 784
[학술지(정기간행물)] - I. J. Gabe / 2009 / Design and implementation of a robust current controller for VSI connected to the grid through an LCL filter / IEEE Trans. Power Electron. 24 (6) : 1444 ~ 1452
[학술대회논문] - C. Wessels / 2008 / Active damping of LCL-filter resonance based on virtual resistor for PWM rectifiers ; stability analysis with different filter parameters / Power Electronics Specialists Conference, 2008. PESC 2008. IEEE : 3532 ~ 3538
[학술지(정기간행물)] - K. Jalili / 2009 / Design of LCL filters of active-front-end two-level voltage-source converters / IEEE Trans. Ind. Electron. 56 (5) : 1674 ~ 1689
[학술대회논문] - T. C. Y. Wang / 2003 / Output filter design for a grid-interconnected three-phase inverter / Power Electronics Specialist Conference, 2003. PESC '03. 2003 IEEE 34th Annual 2 : 779 ~ 784
[학술지(정기간행물)] - I. J. Gabe / 2009 / Design and implementation of a robust current controller for VSI connected to the grid through an LCL filter / IEEE Trans. Power Electron. 24 (6) : 1444 ~ 1452
[학술대회논문] - C. Wessels / 2008 / Active damping of LCL-filter resonance based on virtual resistor for PWM rectifiers ; stability analysis with different filter parameters / Power Electronics Specialists Conference, 2008. PESC 2008. IEEE : 3532 ~ 3538
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