지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.5
- 수록면
- 360 - 368 (9page)
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초록· 키워드
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This paper proposes an active frequency with a positive feedback in the d-q frame anti-islanding method suitable for a robust phase-locked loop (PLL) algorithm using the FFT concept. In general, PLL algorithms for grid-connected PV PCS use d-q transformation and controllers to make zero an imaginary part of the transformed voltage vector. In a real grid system, the grid voltage is not ideal. It may be unbalanced, noisy and have many harmonics. For these reasons, the d-q transformed components do not have a pure DC component. The controller tuning of a PLL algorithm is difficult. The proposed PLL algorithm using the FFT concept can use the strong noise cancelation characteristics of a FFT algorithm without a PI controller. Therefore, the proposed PLL algorithm has no gain-tuning of a PI controller, and it is hardly influenced by voltage drops, phase step changes and harmonics. Islanding prediction is a necessary feature of inverter-based photovoltaic (PV) systems in order to meet the stringent standard requirements for interconnection with an electrical grid. Both passive and active anti-islanding methods exist. Typically, active methods modify a given parameter, which also affects the shape and quality of the grid injected current. In this paper, the active anti-islanding algorithm for a grid-connected PV PCS uses positive feedback control in the d-q frame. The proposed PLL and anti-islanding algorithm are implemented for a 250㎾ PV PCS. This system has four DC/DC converters each with a 25㎾ power rating. This is only one-third of the total system power. The experimental results show that the proposed PLL, anti-islanding method and topology demonstrate good performance in a 250㎾ PV PCS.
목차
Abstract
Ⅰ. INTRODUCTION
Ⅱ. PROPOSED ROBUST PLL ALGORITHM USING THE FFT CONCEPT FOR A GRID-CONNECTED PV PCS
Ⅲ. PROPOSED ACTIVE POSITIVE FEEDBACK ANTI-ISLANDING METHOD IN THE D-Q FRAME
Ⅳ. A NOVEL PV 250KW PCS IMPLEMENTED USING THE PROPOSED ALGORITHM
Ⅴ. EXPERIMENTAL RESULTS
Ⅵ. CONCLUSIONS
REFERENCES
참고문헌 (23)
참고문헌 신청
R. C. Dugan / 2002 / Distributed generation / Industry Applications Magazine 8(2):19~25
V. Kaura / 1997 / Operation of a phase locked loop system under distorted utility conditions / IEEE Trans. Ind. Appl 33(1):58~63
P. Rodriguez / 2002 / Synchronous double reference frame PLL applied to a unified power quality conditioner / Harmonics and Quality of Power, 2002, 10th International Conference on :614~619
P. Rodriguez / 2005 / Double synchronous reference frame PLL for power converters control / PESC’05 :1415~1421
R. I. Bojoi / 2005 / current control strategy for power conditioners using sinusoidal signal integrators in synchronous reference frame / IEEE Trans. Power Electron 20(6):1402~1412
V. Kaura / 1997 / Operation of a phase locked loop system under distorted utility conditions / IEEE Trans. Ind. Appl 33(1):58~63
P. Rodriguez / 2002 / Synchronous double reference frame PLL applied to a unified power quality conditioner / Harmonics and Quality of Power, 2002, 10th International Conference on :614~619
P. Rodriguez / 2005 / Double synchronous reference frame PLL for power converters control / PESC’05 :1415~1421
R. I. Bojoi / 2005 / current control strategy for power conditioners using sinusoidal signal integrators in synchronous reference frame / IEEE Trans. Power Electron 20(6):1402~1412
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UCI(KEPA) : I410-ECN-0101-2013-560-000591324