Principal

The reasonable & effective utilization of solar energy is an important path which can deal with the global energy crisis at present. The output power of Photovoltaic (PV) cells keep changing with solar irradiation & ambient temperature because photovoltaic cells exhibit nonlinear voltage-current characteristics. Therefore maximum power point (MPP) of PV cells changing with solar irradiation & ambient temperature. The proposed model is used to determine the voltage current & power at the MPP and quality of voltage at load terminals for different operating conditions. The model consists of PV module, battery bank, MPPT module, controller, PWM inverter and resistive load. The fluctuation in the output of PV module are controlled and held at max. power output by MPPT module. This paper reports modelling & simulation of Stand- Alone PV with MPPT features & inverter controlled technique. The results are compared with system of without MPPT controlled technique by using MATLAB/Simulink software. MPPT Algorithm for PV array is proposed here. This Algorithm detects the MPP of the PV the computed maximum power Pmax is used as reference value of control system. On/OFF power controller is used to control the operation & increases the input power capability of PV module system