Abstract

With the rise in power demand and depletion of conventional energy resources, the cost of conventional energy has gone up in recent times. In this regard a promising alternative Solar energy has emerged today. Since environmental condition changes PV array’s maximum power changes accordingly, to get peak power various “Maximum Power Point Tracking (MPPT)” techniques are available. Presently various methods are available to maintain the PV system to operate at peak power point. among various techniques, techniques which are simple and less cost are fractional2short-circuit current and fractional open-circuit voltage schemes. In order to measure a Isc and Voc for reference, disconnection of PV cells or short circuit of the PV cells are required periodically. resulting in degradation of utilized power. Perturb and Observe (P and O) MPPT algorithm is a much better technique which avoids this problem and has a better tracking profile. Even though this method has limitations in conditions where the variation in solar irradiation and temperature is fast, this method is quite popular due to the simplicity in its implementation and low resource requirement. This method works on the principle of perturbing and fixing the operating point based on the change in transferred power. Thus present paper focuses on developing a simple, effective new9proposed MPPT algorithm for charge controller, to charge Lead acid batteries from a photovoltaic panel and to integrate it into the Online UPS. Thus power consumption from the grid reduces, with the use of renewable energy source which is available plenty. The paper involves design and simulation of the hardware controller circuit along with the development of new proposed MPPT algorithm for the charge controller and effective current sharing technique for effective utilization of grid power.