Optimal energy management system for grid-connected hybrid power plant and battery integrated into multilevel configuration

• Published in: Energy (Oxford) Vol. 294; p. 130765
• Main Authors: Hosseini, Ehsan, Horrillo-Quintero, Pablo, Carrasco-Gonzalez, David, García-Triviño, Pablo, Sarrias-Mena, Raúl, García-Vázquez, Carlos A., Fernández-Ramírez, Luis M.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.05.2024
• Subjects: Energy storage system; Multi-level inverter; Optimal energy management; Photovoltaic cells; Wind turbine; Multi-level inverter; Photovoltaic cells; Energy storage system; Wind turbine; Optimal energy management
• ISSN: 0360-5442
• DOI: 10.1016/j.energy.2024.130765

A novel optimal energy management system (EMS) using a nonlinear constrained multivariable function to optimize the operation of battery energy storages (BESs) used in a hybrid power plant with wind turbine (WT) and photovoltaic (PV) power plants is proposed in this work. The hybrid power plant uses a configuration based on a battery-stored impedance-based cascaded multilevel inverter to integrate renewable energy sources (PV power plants and WT) and BESs into the grid. The new optimal EMS seeks for satisfying the demanded power while dispatching power between BESs to optimize their efficiency. A grid-connected configuration is implemented to assess the efficiency of the suggested supervisory control under changes in renewable energy (changes in wind speed and irradiation), and in a varying active and reactive powers’ request. The BES efficiency obtained from the suggested EMS is set side by side to the BES efficiency got from a conventional EMS and a model predictive control (MPC), both working based on the state-of-charge (SOC) of the BES and balancing power EMS. The results from MATLAB simulation and the experimental results with the real-time OPAL-RT simulator (OP4510, OPAL-RT) and dSPACE MicroLabBox show the effectiveness of the suggested approach and the improvement in long-term BES efficiency. •Hybrid power plant with wind turbine, PV and battery integrated into multilevel configuration.•Design of optimal energy management system to optimize the battery efficiency.•Control tested from simulation results under different operating conditions and HIL experimental results.•Improved response when compared to other energy management systems.