车辆复合电源功率分配稳定控制策略研究

Research on a Power Distribution Stability Control Strategy of Hybrid Energy Storage System in Vehicles

针对混合动力电动汽车蓄电池-超级电容器复合电源功率分配问题,提出了一种基于滑模变结构和李雅普诺夫的稳定控制策略。滑模变结构控制策略的控制目标包括稳定直流母线电压和精确跟踪超级电容器电流参考值。同时,基于李雅普诺夫理论,对闭环控制系统进行了稳定性分析。在ADVISOR仿真环境下进行仿真研究,并搭建实验样机,进行实验研究。仿真和实验结果表明,该复合电源功率分配控制策略能很好地实现两个控制目标,控制系统实现全局渐近稳定。

A synovial variable structure and Lyapunov power distribution stability control strategy of hybrid energy storage system（HESS） in hybrid electric vehicles（HEV） is presented. The strategy aims to control power converters based on the synovial variable structure in order to satisfy the following requirements： stabilized dc bus voltage regulations and perfectly tracked of SC current to its reference. At the same time, the stability of the closed-loop control system based on the Lyapunov theory is analyzed. The HESS and control strategy are modeled and simulated under the ADVISOR simulation environment, and a prototype of HESS is also built. The results show that the designed control strategy meets all the objectives and achieves asymptotic stability of the closed loop system.