基于指数趋近律的车载复合储能系统全局滑模控制  

Global sliding mode control of vehicle-mounted hybrid energy storage system based on exponential reaching law

作　　者：张细政[1] 卢张宇 谭崇茁 郑亮 ZHANG Xi-zheng;LU Zhang-yu;TAN Chong-zhuo;ZHENG Liang(College of Electrical and Information Engineering,Hunan Institute of Engineering,Xiangtan 411104,China)

机构地区：[1]湖南工程学院电气与信息工程学院,湖南湘潭411104

出　　处：《控制与决策》2021年第4期885-892,共8页Control and Decision

基　　金：国家自然科学基金项目(61673164)。

摘　　要：针对电动汽车存在电池使用寿命和续航里程不足的问题,引入超级电容、电池和DC/DC变换器构成车载复合储能系统.基于五阶状态空间电路平均模型,提出一种基于指数趋近律的全局滑模(E-GSM)控制策略,并基于Lyapunov方法进行控制策略的稳定性分析.该策略包括一个全局滑模电流控制器(用于精确跟踪电池和超级电容电流参考值)和一个PI控制器(用于稳定母线电压);同时,提出一种改进的基于规则的能量管理策略,用于生成电池电流参考值.仿真结果表明, E-GSM控制策略能够精准跟踪负载功率变化,在中国典型城市工况及新欧洲行驶工况下,电池SOC终值分别提高10%和7%,且避免了电池大电流放电,验证了E-GSM控制策略的有效性.In view of the problems of short battery life and driving distance of electric vehicles, super-capacitors,batteries and DC/DC converters are introduced to form vehicle-mounted hybrid energy storage systems. Based on the circuit average model of the five-order state space, a global sliding mode control strategy based on exponential reaching law(E-GSM) is proposed, and the stability of the control strategy is analyzed based on the Lyapunov method. The strategy includes a global sliding mode current controller which can accurately track the current reference value of the battery and super-capacitor, and a PI controller which can stabilize the bus voltage. At the same time, an improved rule-based energy management strategy is proposed to generate the current reference value of the battery. The simulation results show that the E-GSM control strategy can accurately track the change of load power. Under typical urban conditions in China and new Europe driving conditions, the final SOC value of the battery has increased by 10 % and 7 %, respectively, and the high current discharge of the battery can be avoided, which can verify the effectiveness of the E-GSM control strategy.

关 键 词：电动汽车 复合储能系统 能量管理 指数趋近律 全局滑模控制 

分 类 号：TK02[动力工程及工程热物理] U469.72[机械工程—车辆工程]