MPPT Based Solar Battery Charger Using Buck-Boost Converter by Incremental Conductance Technique

The basic need of present century is energy, more specifically renewable energy sources. The transformation from conventional energy source to renewable energy source has increased the dependency on these resources. This renewable energy can be generated from numerous devices, but Solar PV Array plays a major role in it. This energy can be stored in the battery for later use. The major drawback with Solar PV Array is their efficiency and reliability. The parameter that influences the efficiency and reliability are Temperature and Solar Irradiation. The optimal solution to improve the efficiency and reliability is implementing MPPT (Maximum Power Point Tracing) to the Solar PV Array system. There are numerous techniques available to implement MPPT; here we implemented Incremental Conductance technique due to its simplicity and effectiveness.The Incremental Conductance algorithm is fed to the controller, so as to control the duty cycle of the buck-boost converter to operate at maximum power point. Thus this power can be stored to battery. The result obtained by this technique is more optimum and have comparably lesser oscillation than Perturbation and Observation (P&O) Technique.