Performance of the battery energy storage systems based on cascaded H-bridge multilevel converter

Abstract

The battery energy storage system (BESS) based on the cascaded multilevel converter, that consists of cascaded H-bridge converter, is one of the most promising and interesting options, which is taken to compensate the instability of electric power grid when integrated with renewable sources such as photovoltaic (PV) and wind energy. This article describes 14.14 kV, 2 MW, and 1000 Ah BESSs based on a three-phase cascaded H-bridge multilevel converter using lithium–ion batteries. Therefore, the article focuses on the performance of the system integrated with both the electric power grid and the local load power applications. Moreover, the control of the system is based on active power control and state-of-charge balance control of the individual cell and phase, which depends on superimposing the AC voltage and the zero-sequence voltage injection. Finally, using MATLAB/Simulink tools, the simulation results obviously verify the controller's performance and efficiency as well.

Keywords

• power control
• secondary cells
• power grids
• power convertors
• battery storage plants
• power generation control
• bridge circuits
• lithium compounds
• electric power grid
• local load power applications
• active power control
• battery energy storage system
• three-phase cascaded H-bridge multilevel converter
• lithium–ion batteries
• state-of-charge balance control
• MATLAB/Simulink tools
• voltage 14.14 kV
• power 2.0 MW