基于指数趋近律的车载复合储能系统全局滑模控制

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...

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

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.