Abstract
A novel is based on a simplified two-diode model of photovoltaic (PV) module,which can more accurately predict the output characteristic of the solar cells I-U curve. On this basis, Aiming at promptness and stability tracking the maximum power point of the photovoltaic cells under the conditions of the constant temperature and light intensity, a novel control strategy based on sliding mode based extremum seeking control (SM-ESC) system for optimally tracking the maximum power point of the photovoltaic cells is proposed.To achieve higher control quality, an adaptive adjustment method is further presented on the basic of stabilizing conditions of SM-ESC system, avoiding complicated manually parameter adjustment.Thus photovoltaic system can quickly stabilize at the maximum power point, less volatile when tracking the optimum output curve. Simulation results show the effectiveness and validity of the control strategy and adjustment method proposed .
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