超级电容负载的耦合并联充电系统无源分布式协同控制

Passivity-based distributed cooperative control for coupled parallel charging systems with super-capacitor loads

中文关键词  耦合动态互联系统  均流  分布式  协同控制  无源  存储函数

英文关键词  coupled inter-connected dynamical systems  current-sharing  distributed  cooperative control  passivity  storage function

中文摘要

      储能式轻轨车辆采用超级电容作为动力源, 其并联充电系统每个充电机不可避免的存在着线路不对称、元 器件老化及工艺误差等因素, 使得输出电流不均衡. 本文将并联充电系统的电流均衡问题抽象成一类非线性耦合 动态互联系统的输出同步问题, 结合系统的无源性, 根据最近邻原则, 借助饱和函数, 设计了保证控制输入有界的输 出同步控制器. 利用子系统存储函数构造李雅谱诺夫函数, 在系统满足无源性、通信拓扑满足细致平衡条件的情况 下, 借助Barbalat等相关引理证明了整个闭环系统的稳定性. 将提出的无源性协同控制方法运用到了具有超级电容 负载的并联充电系统控制实例中, 借助仿真验证了本文提出的无源性协同控制方法的有效性.

英文摘要

      Because there exist manufacture errors inevitably and the line connection of the circuit can not be guaranteed to be completely symmetrical, the output currents of the parallel charging system for energy storage type light rail vehicles with super-capacitors as its power-supply are not balanced. In this paper, the current-sharing problem of parallel charging systems is abstracted into the output synchronization problem of one class nonlinear coupled inter-connected dynamical systems. The out synchronization controller is designed based on the nearest neighborhood rule by adopting a saturation function, considering the passivity for such systems. The closed-loop system stability is rigorously proved with the aid of Lyapunov function based on storage functions of sub-systems integrating with Barbalat lemmas, which is assumed that the system passivity condition and the communication topology details balanced condition are both satisfied. The passivity-based distributed cooperative control is applied in the parallel charging systems with super-capacitor loads. The effectiveness and applicability of the proposed methods is verified by simulations.