Advanced nonlinear control of WEC system in AC microgrid connected to the main grid with electric vehicle integration

• Published in: e-Prime 2024-09, Vol.9, p.100718, Article 100718
• Main Authors: Atifi, Youness, Kissaoui, Mohammed, Raihani, Abdelhadi, Errakkas, Khalid, Khayat, Ahmed
• Format: Article
• Language: English
• Subjects: Active disturbance rejection control; Backstepping control; Electric vehicles; Permanent magnet synchronous generator; Photovoltaic system; Smart grid; Wind energy conversion
• ISSN: 2772-6711; 2772-6711
• DOI: 10.1016/j.prime.2024.100718

•Innovative control Strategy: this article presents a novel solution combining backstepping control and ADRC control for effective microgrid management, a combination not previously explored.•Comprehensive nonlinear control : it addresses nonlinear control for a microgrid encompassing various sources from both the machine side and the grid side.•In-depth wind conversion chain Analysis: a detailed study of the wind conversion chain is provided, enhancing understanding and control mechanisms.•Validation through simulation : the theoretical study is validated through extensive simulations in the MATLAB/Simulink environment, demonstrating the practical feasibility and effectiveness of the proposed methods.•Comparative analysis with PI controller : a thorough comparison with the PI controller is conducted, highlighting the superior performance and advantages of the proposed ADRC-backstepping approach. This research investigates an AC microgrid interconnected with the utility grid, comprising a 5.2 kW wind power system using a Permanent Magnet Synchronous Generator (PMSG), a 6.1 kW photovoltaic system (PVS), and integrated electric vehicles (EVs) with 600 V, 10Ah batteries operating in V2G and G2V modes. Bidirectional back-to-back converters, controlled via a voltage-oriented control (VOC) strategy, facilitate the interconnections. The PMSG system is controlled using vector control methodology, while the PVS employs a double-stage configuration with a perturb and observe algorithm for maximum power point tracking (MPPT). Advanced controllers based on Active Disturbance Rejection Control (ADRC) regulate generator speed and the DC link voltage of the grid-connected converters. The backstepping technique is utilized for internal loop control of PMSG currents and coupling filter currents for the grid-connected converters. A comparative study between the ADRC-Backstepping controller and the PI controller was conducted, demonstrating the superior efficacy of the ADRC-Backstepping approach. Simulation results show accurate regulation of DC link voltage at reference levels, operation with unit power factor, with a current THD below 4 %, demonstrating the effectiveness and robustness of the proposed control strategies under varying conditions.