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http://dx.doi.org/10.6113/TKPE.2012.17.5.423

An Adaptive Maximum Power Point Tracking Scheme Based on a Variable Scaling Factor for Photovoltaic Systems  

Lee, Kui-Jun (Dept. of Electrical Eng., Hanyang University)
Kim, Rae-Young (Dept. of Electrical Eng., Hanyang University)
Hyun, Dong-Seok (Dept. of Electrical Eng., Hanyang University)
Lim, Chun-Ho (P-development Team, LG Uplus Corporation)
Kim, Woo-Chull (P-development Team, LG Uplus Corporation)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.17, no.5, 2012 , pp. 423-430 More about this Journal
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.
Keywords
maximum power point tracking (MPPT); photovoltaic (PV); scaling factor; small-signal model; curve fitting;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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