IBS - P&O Hybrid MPPT Algorithm for Solar PV Applications

Abstract

This paper brings forward a novel hybrid maximum power point tracking(MPPT) algorithm. The new MPPT algorithm is a hybrid between the Improvised Binary Sequence(IBS) MPPT algorithm and the well known Perturb and Observe(P&O) MPPT algorithm. This algorithm helps to give the much-needed flexibility to the IBS algorithm to take care of the minute changes in temperature and solar radiance, which leads to a change in the maximum power point(MPP) of any solar module. The initial operating point is found out by using the IBS algorithm. Thereafter, the control is transferred to the P&O algorithm to take care of gradual and minute changes. In case rapid changes in operating conditions are sensed due to any reason, the entire algorithm restarts from the beginning by re-initializing the parameters and putting the IBS algorithm to use. The proposed algorithm decides when to re-initialize the parameters depending on the limits set by the operator. The proposed algorithm was coded in Matlab and was tested in simulation in Simulink.