Implementation of Solar Array Integration with PID and MPPT (P&O) Incorporating Input Variations

Low output voltage and thus low conversion efficiency are the result of variable radiations at the input of solar array. To enhance the output voltage of solar array, there is a need of design of suitable controller. In this paper, a step input is considered for sudden changes in irradiance as input to solar array. Further, it is given to the six series-connected solar cells of each rating 3 V, thus forming a solar array. Then this assembly is connected first with proportional-integral-derivative controller (PID)-boost converter and secondly with maximum power point tracking (MPPT) using perturb and observe (P&O)-boost converter. Further voltage is measured before and after implementing the proposed techniques. Simulation results show that a significant enhancement in output voltage is obtained after implementing the proposed techniques. However, the results obtained after implementing MPPT (P&O) are good enough and stable.