using photovoltaic systems is gradually expanded by increasing energy demand. abundance and availability of this energy, has turned to one of the most important sources of renewable energy. unfortunately, photovoltaic systems have two big problems: first, those have very low energy conversion efficiency (in act between 12 and 42 percent under certain circumstances). second, the power produced b...

in this paper optimal torque control (otc) of stand-alone variable-speed small-scale wind turbine equipped with a permanent magnet synchronous generator and a switch- mode rectifier is presented. it is shown that with otc method in standalone configuration, power coefficient could be reached to its maximum possible value, i.e. 0.48. an appropriate control algorithm based on turbine characterist...

Abstract Solar power generation is related to climatic conditions, and its high cost low efficiency have become the main factors restricting development. Realizing maximum tracking of solar photovoltaic through electronic technology control an effective measure increase systems, reduce costs, improve energy conversion efficiency, widely promote technology. According illumination characteristics...