태양광 시스템을 위한 가변 조정계수 기반의 적응형 MPPT 제어 기법An Adaptive Maximum Power Point Tracking Scheme Based on a Variable Scaling Factor for Photovoltaic Systems
- Other Titles
- An Adaptive Maximum Power Point Tracking Scheme Based on a Variable Scaling Factor for Photovoltaic Systems
- Authors
- 이귀준; 김래영; 현동석; 임춘호; 김우철
- Issue Date
- Oct-2012
- Publisher
- 전력전자학회
- Keywords
- maximum power point tracking (MPPT); photovoltaic (PV); scaling factor; small-signal model; curve fitting
- Citation
- 전력전자학회 논문지, v.17, no.5, pp.423 - 430
- Indexed
- KCI
- Journal Title
- 전력전자학회 논문지
- Volume
- 17
- Number
- 5
- Start Page
- 423
- End Page
- 430
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/164473
- DOI
- 10.6113/TKPE.2012.17.5.423
- ISSN
- 1229-2214
- Abstract
- An adaptive maximum power point tracking (MPPT) scheme employing a variable scaling factor is presented. A MPPT control loop was constructed analytically and the magnitude variation in the MPPT loop gain according to the operating point of the PV array was identified due to the nonlinear characteristics of the PV array output. To make the crossover frequency of the MPPT loop gain consistent, the variable scaling factor was determined using an approximate curve-fitted polynomial equation about linear expression of the error. Therefore, a desirable dynamic response and the stability of the MPPT scheme were maintained across the entire MPPT voltage range. The simulation and experimental results obtained from a 3 KW rated prototype demonstrated the effectiveness of the proposed MPPT scheme.
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