Analysis and Optimization of Energy Balancing Control Strategies for Cascaded Multilevel Energy Storage Inverter

Energy balancing control in cascaded multilevel energy storage inverters (CMESIs), which consist of distributed energy storage devices across power modules (PMs), poses a significant challenge. Existing studies have identified limitations and shortcomings in achieving energy balance through differential power distribution to individual PMs. This paper presents a comparative analysis of two established energy balancing control strategies to assess their respective regulation capabilities for the CMESIs. The effectiveness of the selected strategy is verified through the simulation results, showcasing its potential to achieve energy balance in the CMESIs. The findings contribute to the advancement of energy balancing control techniques, offering valuable insights to enhance system performance and stability in practical applications.

I. Introduction

Ultra-high-speed linear motor propulsion (UHSLMP) technology plays a crucial role in the transportation and military industries, enabling rapid acceleration of heavy objects through electromagnetic force. However, the high power output required for operation within a few seconds can impose significant stresses on the power system. To address this challenge, the integration of a high-power cascaded multi-level energy storage inverter (CMESI) is introduced, which can provide the necessary power output without causing disruptions to the power system.