ELOUAFI, MOHAMED (National School of Applied Sciences, University Chouaib Doukkali), MCHAOUAR, YOUSSEF (ESE Lab, ENSEM of Casablanca, Hassan II University of Casablanca), abouelmahjoub, younes (University of Chouaib Doukkali - El Jadida), kandoussi, Khalid (UCD), Giri, Fouad (University of Caen Normandie), El Beid, Said (National School of Applied Sciences of Marrakech, ENSAM, Univers), EL KARCH, Hamza (UCD EL JADIDA)

Adaptive Nonlinear Control of the Single-Phase Grid-Connected Photovoltaic System

Scheduled for presentation during the Regular Session "Photovoltaic systems control " (FriS1T1), Friday, July 12, 2024, 09:40−10:00, Salle des conférences

12th IFAC Symposium on Control of Power & Energy Systems, July 10-12, 2024, Rabat, Morocco

This information is tentative and subject to change. Compiled on January 2, 2025

Abstract

This paper addresses the problem of controlling the single-phase grid connected to the photovoltaic (PV) system through a three-level boost converter (TLBC) and half-bridge inverter (HBI) with LCL-filter. This study aims to achieve four main objectives: (i) ensure that the output voltage of PV panel track a reference given by the MPPT block based on the perturb and observe (P&O) algorithm; (ii) regulate DC bus voltage to ensure injection of photovoltaic power into the grid; (iii) guarantee power factor correction (PFC); (iv) ensure a balance between TLBC output voltages. The problem is dealt with using a nonlinear controller based on the backstepping and lyapunov approaches, a filtered-PI regulator to ensure the power balance between the grid and the PV panel. An adaptive observer is designed in order to estimate the voltage and the impedance parameters of power grid, by measuring only the grid current. The proposed controller and observer performances are confirmed by simulation in MATLABSimulink.