Control and Power Management of a Grid-Connected PV-FC Distributed Generation System Using PSO-Optimized Discrete-Time Integral Sliding Mode Control

Abstract

This paper presents a control strategy for a PV-FC hybrid generation system using a three-level NPC converter based on discrete-time integral sliding mode control (DISMC) combined with particle swarm optimization (PSO). First,  comprehensive modeling of the main system components is presented. Then, the design of the proposed control is detailed, followed by the optimization procedure using PSO to determine the optimal DISMC gains. A power management strategy is integrated within the control system to maximize the performance of the hybrid system, enabling decoupled control of active and reactive power in two distinct operating modes: Feeder-Flow Control (FFC) and Unit-Power Control (UPC). The approach is validated using MATLAB/Simulink simulations. Results, compared to the non-optimized DISMC, demonstrate the effectiveness and robustness of the proposed strategy.