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| A Two Stage Variable Step-Size Maximum Power Point Tracking Control |
| Hu Yihua, Chen Hao, Xu Ruidong, Hu Xianxin, Wang Xiaokun |
| China University of Mining and Technology Xuzhou 221008 China |
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Abstract Through analysis photovoltaic mathematic model and photovoltaic output power and duty-ratio function relationship, a novel two stage variable step-size maximum power point tracking control strategy is proposed. The simulation model of photovoltaic system based on state equation is built up using Matlab/Simulink. By simulation model, perturb and observation, fuzzy control, common variable step-size, two stage variable step-size are compared, and simulation results indicate two stage variable step-size has quick respond and good stability. Finally, hardware experiment is set up, and the validity of the proposed method is verified by experimental results.
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Received: 05 June 2009
Published: 04 March 2014
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2010, Vol. 25 
