A Series Multi-Cells Converter Controlled by Dspace 1103 Using Pid and Fopid Controller Tuning with Gwo and Pso Algorithms: Experimental on Grid-Connected Solar Pv System

Abstract

This paper emphasizes the modelling and control of a series multi-cells converter for three phase grid connected PV system. The control strategy applied to the inverter, the fast inner current control loop, which regulates the grid current, and an outer voltage control loop, which controls the dc-link voltage. The control of this inverter for three phase grid connected PV system are designed based on PID and fractional- order PID (FOPID) methods. In this paper the PSO and Grey Wolf Optimizer (GWO) algorithm has been used to tune the parameter of PID and PI^λD^μ controller in order to get an optimum time domain specification in which integral of time weighted absolute error (ITAE) has been minimized, where the five parameters (Kp, Ki, Kd, λ and μ) found directly by utilizing (PSO) and GWO algorithm. The design of LCL filter to meet the specified THD requirement for grid is presented and the corresponding harmonic analysis is performed for different methods. The proposed system has been validated using a grid connected three-phase of a series multi-cells inverter. The control algorithm was executed in a dSPACE 1103 real time platform.