混合动力电动汽车的复合电源功率分配控制策略

提出一种混合动力电动汽车的复合电源功率分配控制策略。复合电源中蓄电池作为主电源,超级电容器作为辅助电源,主电源和辅助电源各自经过一个升压变换器和升降压变换器连接至直流母线端,两种电源之间的能量转换由功率变换器实现。控制策略的控制目标为:(1)稳定直流母线电压;(2)精确跟踪超级电容器电流参考值;(3)控制系统实现全局渐近稳定。在Matlab Advisor仿真环境下对复合电源以及所提控制策略进行建模与仿真,并搭建了试验样机进行试验。仿真和试验结果表明:所提复合电源功率分配控制策略能较好地满足以上三个控制目标,充分发挥复合电源中蓄电池和超级电容器的优势。

A Power Distribution Control Strategy of Hybrid Energy Storage System in Hybrid Electric Vehicles

This paper studied a power distribution control strategy of hybrid energy storage system (HESS) in hybrid electric vehicles (HEV). In HESS, battery is as a main power source and an ultra-capacitor (UC) is as an auxiliary power source. Regarding the power stage of energy conversion, a boost converter is connected with the main source and a buck-boost converter is connected with the auxiliary source. The objectives of the control strategy are as follows: ① stabilize DC bus voltage regulations, ② perfectly trace the current reference of super capacitor, ③ achieve asymptotic stability of the closed loop system. The HESS and control strategy are modelled and simulated under the Matlab Advisor simulation environment, and a prototype of HESS is also built. The results show that the designed control strategy meets all the objectives. It can make full use of the advantages of battery and UC.