Modelling and simulation of photovoltaic system with emergency backup(battery)

Abstract

Energy, especially alternative source of energy is vital for the development of a country. Incoming decades, the world anticipates to develop more of its solar resource potential as an alternative energy source to overcome the persistent shortages and unreliability of power supply. The main drawback of solar photovoltaic system is that it depends on environment conditions (temperature and insolation). In order to maximize the power output the system components of the photovoltaic system should be optimized. This paper describes the modeling and simulation of photovoltaic system with emergency backup (battery). In this paper first we describe the modeling of PV system which is based on mathematical equations and is described through an equivalent circuit including a current source, a diode, a series resistor and a shunt resistor, then how to extract maximum power from PV system this is achieved using constant voltage maximum power point techniques (CV MPPT) and in last used this system with battery. When solar photovoltaic system not provide sufficient power to load at that time battery is used to give power for load i.e. at poor weather condition photovoltaic system disconnected from the load and battery connect to give power.