Maximum Power Tracking Based Open Circuit Voltage Method for PV System

Photovoltaic power plants pose challenges when integrated with power grid. The PV plants always focus on extracting maximum power from arrays. A new technique for tracking a pseudo-maximum power point for creating power reserve is presented. By using developed fractional open circuit voltage algorithm power is extracted from the array and continuously power is supplied to load as well as for charging the battery. In this project a 12V, 7Ah battery is used for charging and to avoid the revise current flow from the battery when input is, diode is replace by MOSFET which will stop the reverse current .Generally in other algorithm will trace the power when maximum input is coming for that time power circuit is disconnected from the load. In this case power developed algorithm is connected to designed moderate power five switch synchronous algorithm and operates in pseudo-operation which will continuously supply the power to charge the battery. This can be control by using PIC microcontroller which will generate the pulses and track the PV power. Precise measurement in the steady state shows that the converter finds the maximum power point with tracking 95.85%.