Regenerative braking energy storage and utilization of high-speed maglev train considering real-time maximum power constraints

In response to the unique characteristics of the structure and operational rules of the traction power supply system of high-speed maglev trains,which result in the inability to actively utilize regenerative braking energy and a significant impact of energy feedback methods on local area network voltage,based on the analysis of the structure and energy flow mechanism of high-speed maglev train traction power supply system,the topology structure for a high-speed maglev train regenerative braking energy recovery and utilization system using ground-based supercapacitor energy storage is given. Considering the characteristics of regenerative braking energy recovery system of high-speed maglev train,such as small capacity configuration and noticeable variation of working voltage of supercapacitor,aiming at efficient recovery of regenerative braking energy,taking the real-time maximum operable power of the energy storage system as the constraint power,the corresponding energy management strategies are developed,so as to achieve energy management under various system conditions. The efficient operation of the entire regenerative braking energy utilization system is realized through a layered control strategy. The effectiveness of the proposed regenerative braking energy recovery and utilization system and control strategy is verified through simulation. The results indicate that the proposed solution can reduce the traction energy consumption of high-speed maglev trains by 21.83%. Furthermore,compared to the power allocation method with a fixed power constraint used in energy storage system,the regenerative braking energy utilization rate is increased by 11.9%. © 2024 Electric Power Automation Equipment Press. All rights reserved.