Design of photovoltaic based battery charger using sliding mode MPPT control

A Photovoltaic PV module along with an interconnection which gives proper voltage and current to charge rechargeable batteries is termed as PV Battery Charger. The interconnection system used is DC-DC converter which provides suitable charging voltage and current to the battery. Maximum Power Point Tracking is very unique to the field of PV systems to extract maximum power during operation. There are many conventional methods available for Maximum power point tracking but they fail under rapidly varying weather conditions. To overcome this problem, non linear controllers are utilized much in the field of photovoltaic system. In this paper, the Sliding Mode Controller is implemented as the MPPT algorithm to deliver maximum power even under rapidly varying environmental conditions, disturbances and system uncertainties. The obtained results indicate that the Sliding Mode Controller provides robustness under varying weather conditions compared to the conventional MPPT algorithms.