MRD减振控制系统的后备混合储能电源设计与仿真

Design and Simulation of Backup Hybrid Energy-storage Power Supply for MRD Vibration Control System

针对磁流变阻尼器MRD(magnetorheological damper)减振控制系统后备电源采用单一蓄电池供电存在响应时间慢和稳定性差问题,提出锂电池/超级电容的后备混合储能电源。首先进行储能系统供电方式的选择及容量配置,然后设计了锂电池和超级电容分别串联双向DC/DC变换器进行功率分配的混合储能结构,再将负载端电流滤波后的高频分量和低频分量用来实现变换器电压电流闭环控制,最后在Matlab/Simulink中搭建混合储能仿真模型,进行输出响应和脉冲功率扰动仿真,对单一锂电池储能和混合储能电源进行性能比较。结果表明,混合储能电源的输出响应时间可达毫秒级;超级电容能提供80%起始功率,并且在脉冲功率扰动下补偿波动功率,以维持母线端稳定,满足MRD减振控制系统的实际工程需求。

Aimed at the problems in the backup power supply for a magnetorheological damper(MRD)vibration control system when using a single battery such as slow response time and poor stability,a lithium battery/supercapacitor backup hybrid energy-storage power supply is proposed.First,the power supply mode of energy-storage system is selected,and its capacity is configured.Then,a hybrid energy-storage structure is designed,in which lithium batteries and supercapacitors are connected in series with two-way DC/DC converters for power distribution respectively,and the high-and low-frequency components of the filtered load current are used to realize the voltage and current closed-loop control of the converter.Finally,a hybrid energy-storage simulation model is built in Matlab/Simulink to perform simulations on output response and impulse power disturbance,and the performance of a single lithium battery energy-storage system is compared with that of a hybrid energy-storage.Results show that the output response time of the hybrid energystorage can reach the millisecond level,and the supercapacitor can provide 80% of the initial power.In addition,under the pulse power disturbance,the supercapacitor can compensate for fluctuating power and maintain the bus stability,which meet the actual engineering requirements for an MRD vibration control system.