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Control of Multilevel CHB Converter for Battery Energy Storage System

This paper is focused on the challenges in design and control of power converter for Battery Energy Storage System (BESS). This paper sums up design of small-scale prototype for BESS with the focus on power converter and its control. The first part of the paper explains converter topology selection, design of output LC filter and transformer. The second part of the paper describes control algorithm and feed-forward model derivation. Finally, the model simulation results and its validation are presented. The designed system with BESS 60 kW/30 kWh will be used for power peak-shaving (reduction of maximal demanded power) in the laboratory for testing of traction drives and as technological demonstrator for larger 5 MW device.