纯电动汽车复合电源能量管理控制策略研究

Research on Energy Management Strategy of Hybrid Energy Storage System in Pure Electric Vehicle

蓄电池循环寿命短、充放电效率低等缺陷制约了纯电动汽车储能系统的发展,将蓄电池与超级电容器组合成复合电源系统,并采用合理的能量管理控制策略,充分发挥两类能量源的优势,能有效降低纯电动汽车的能量消耗、提高储能系统的使用寿命。根据复合电源的工作方式设计了模糊逻辑能量管理控制策略,采用遗传算法对模糊控制器隶属度函数参数进行了优化。通过MATLAB与ADVISOR联合仿真,结果表明,经遗传算法优化后的能量管理控制策略能够显著降低系统的总能耗,提高制动能量回收效率,改善蓄电池放电状态,并提高储能系统的使用寿命。

The defects of short cycle life and low charging/discharging efficiency of battery restricted the development of pure electric vehicle(PEV)energy storage system,the hybrid energy storage system(HESS)combined with batteries and supercacitors can effectively reduce the energy consumption of PEV and improve the service life of the energy storage system by adopting reasonable energy management control strategy and giving full play to the advantages of both energy storages.The fuzzy logic energy management control strategy was designed based on working way of HESS,the parameters of membership function of fuzzy controller was optimized with genetic algorithm.The simulation was carried out with MATLAB and ADVISOR,the result shows that the total energy consumption of HESS is significantly reduced after optimization,the recycling efficiency of regenerative braking is improved and the discharge state and service life of the energy system is improved.