An adaptive maximum power point tracking scheme based on a variable scaling factor for photovoltaic systems
- Authors
- Lee, Kui-Jun; Kim, Rae-Young
- Issue Date
- Feb-2013
- Publisher
- IEEE
- Keywords
- curve fitting; Maximum power point tracking (MPPT); photovoltaic (PV); scaling factor; small-signal model
- Citation
- 2012 IEEE Vehicle Power and Propulsion Conference, VPPC 2012, pp.1422 - 1429
- Indexed
- SCOPUS
- Journal Title
- 2012 IEEE Vehicle Power and Propulsion Conference, VPPC 2012
- Start Page
- 1422
- End Page
- 1429
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/163549
- DOI
- 10.1109/VPPC.2012.6422600
- 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 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 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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