Abstracto

Maximum Power Point Tracker for Sub watt Photovoltaic Module

K. Vishnu Priya, I. Kathir

This paper propose a maximum power point tracker (MPPT) for subwatt photovoltaic (PV) module. This provides maximum output power by tracking continuously the maximum power point (MPP), which depends on the temperature and an irradiance condition and is used in wireless sensor network (WSN). Dynamic power management technique is used to reduce the power consumption of the PV module and the system is dynamically reconfigured to activate the minimum number of modules. An ultra low power microcontroller is used to implement MPPT algorithm for low processing time and low circuit complexity. A perturb and observe maximum power point tracking (P&O MPPT) is used for low cost implementation. The pulse frequency modulation (PFM) technique is used for low power level which adjusts the switching activity of available power and this leads to reduce its efficiency at higher ripple current. This can be solved by implementation of current limiter for high switching frequency. The simulation studies have been carried out by NI MultisimTM 12.0.