Am improved MPPT controller for PV System under partial shading
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The Photo voltaic cell is use in may filed replaced by the fossil fuel because the Photo voltaic is Eco friendly and availability. In recent year there are so many researchers to research that field for reduce the problem and increase efficiency. One of the major and basic problems is shadowing in the PV array. The shadowing effect affects the PV overall efficiency. The PV array is collecting of Photo voltaic cell sometimes the PV arrays some cells are defected from corrosion, environmental changes, or some other causes which reduce its output. That one cell output is reduced it affects the overall output of the image. That partial shadow effect affect the PV cells efficiency. So that is rectify for increase the PV arrays efficiency. One of the method of rectify the shadowing in PV cells is MPPT (Maximum Power Point Tracking) in this method the shadowing affected cell is find in entire PV array. Use these MPP (Maximum Power Point information) the PV cells maintained the voltage as non-affected cells. In previous method the MPPT is done by P&O algorithm. The P&O algorithm is very good searching algorithm but it accuracy is low so the alternative algorithm needs to improve the accuracy of searching. In our proposed use the Fuzzy Logic control is use to searching the MPP in PV array. FLC is one of the best searching algorithms it searching the MPP based on reference voltage. If the PV cell produces low voltage compare with the reference voltage. That cells are by passed used the diode that by bass circuit get the voltage from non- shaded area that voltage will help to regulate the output voltage.
Tags: 2014, Matlab, Power Electronics Projects