Photovoltaic Fed Flyback Converters using Improved Perturb and Observe Algorithm

The solar energy is widely available all over the world. Nowadays electricity has become part and parcel of our life. As the consumption of electricity increases progressively, it is necessary to switch over to renewable energy resources. This paper aims at providing steady power to the load connected to the grid using Maximum power point tracking algorithm (MPPT) based on Improved Perturb and Observe method. This method provides an efficient way of improving the steady power supplied to the load. The dc power from the PV module is converted into AC power using highly isolated fly back converters and is then supplied to the grid connected load. The solar irradiance may not remain constant around the clock. In order keep track of maximum power produced by the PV module and to obtain the modifiable step size, the improved P&O technique is adopted. This technique also features in improving the accuracy and efficiency in an infinitesimal way.