Hybrid H-6 inverter coupled automatic dual axis solar tracking system

Renewable energy is rapidly gaining importanceas an alternative energy resource since fossil fuel are depleting and their prices are fluctuating. The unique feature of the proposed method is the use of Hybrid H6 type inverters instead of PWM inverters which eliminates the common mode voltage error thus reducing the transient oscillations, noise, etc. This project examines the potential benefits of having a dual axis tracking for the solar panels which ensures maximum power point tracking (MPPT) taking solar rays as the only reference profile. Tracking is implemented through the use of LDR's and stepper motors which are driven by a built in ADC. Isolated Gate Driver circuit is used for driving the MOSFET switch by ground switched isolation provided by the opto-couplers from other components. Automatic control of the tracking panel, stepper motors and the driver circuit is provided the microcontroller (PIC16F887A). With the implementation of the proposed system, the energy efficiency can be increased by 20%–25% than the existing system with very less consumption of the system itself.