Design and implementation of PSoC microcontroller based photovoltaic system

The world energy consumption is increasing very fast but unfortunately the global conventional fuels in reserves are running out. All scientists agreed that solar energy is one of the best solutions for energy supply in many parts of the world. In accordance with the need, the main objective of this paper is to design an effective Photovoltaic (PV) System that would charge lead acid battery efficiently in the variable environmental condition. So in order to maximise the PV output power irrespective of the temperature and irradiation conditions, Maximum Power Point Tracking (MPPT) technique is adapted. A PV system has been implemented using a boost type DC to DC converter, which is controlled through the Programmable System on Chip (PSoC) microcontroller by adjusting a duty cycle from Pulse Width Modulator. A single PSoC microcontroller can handle both analog and digital circuits, and reduces the need for additional circuit elements. It is programmed with a simple and reliable MPPT technique i.e., the Constant Voltage Maximum Power Point Tracking (VMPPT). By applying MPPT control, solar energy is charged to a lead acid battery to adjust changes in the environmental condition.