Sistema de armazenamento de energia com conversor multinível para redes de média tensão

Abstract

This work presents the development of a seven-level CHB multilevel converter prototype, for applications with battery energy storage systems in medium voltage grids. The specification of each component that composes the power stage of the equipment, as well as the description of the circuits that compose the electronic measurement and control system, are described in detail. To demonstrate the functionality of the implemented prototype, results are presented injecting active power into a 13.8 kV system and charging the battery banks during scheduled times. The system has a GPS set to provide time information to perform the transition of the active power support and battery charging mode. The implemented function is based on the control of active current manipulated by the converter. For it, is used the proportional resonant controller together with an algorithm that coordinates charge and discharge of battery banks. The implementation of the control loop and the control algorithm is performed in the TMS320F28335 microcontroller. Finally, results are also presented to demonstrate the possibility of using this equipment for reactive power compensation and system’s voltage regulation.