PSO-PID Maximum Power Point Tracking Controller using Modified Superlift Luo Converter

Abstract

With the focus on green energy in today's world, Photovoltaic (PV) system has emerged as an excellent renewable source of power for wide range of applications. The main objective of PV system lies in the extraction of maximum power to meet the load demands. This is achieved by making the PV cell operate at an optimum point. This point is mentioned as maximum power point (MPP).This paper portrays the PSO-PID (particle swarm optimization-proportional-integral-derivative) control employed for maximum power point tracking (MPPT) algorithm for PV systems. In addition, it also implements a novel high gain, low ripple DC-DC converter named Modified Negative Output Superlift Luo converter (MNOSLC) whose duty ratio is adjusted by the PSO-PID controller to extract the maximum power. The PSO-PID performance is compared with the conventional Perturb and Observe (P&O) MPPT (Maximum Power Point Track) controller for varying irradiation levels. The simulations are carried out using MATLAB and the results reveal that the efficiency of trapping maximum power is high in PSO-PID compared to P&O for the conditions of varying insolation.It is also verified and validated with the theoretical calculations. A prototype of MNOSLC is developed and shown with a geometric progression rise in its voltage.