Multilevel power converter with a dual T-type three level inverter for energy storage

Abstract

In this work a new multilevel structure for interfacing energy storage systems is presented. This structure is based on a dual T-type three level voltage source inverter. These two power converters are connected to the grid by a three-phase transformer. This transformer has an open winding configuration on the side that connects to the multilevel power converter. This structure will present multilevel characteristics. A controller for this multilevel structure is also presented. The proposed topology and control system has been verified by numerical simulations. From the results of these simulations it is possible to verify the characteristics of the proposed structure.I.