China Mechanical Engineering ›› 2015, Vol. 26 ›› Issue (12): 1690-1696.

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Cooperative Control Strategy  of  Power  Following-speed Switching in  a  Range  Extender  Electric  Vehicle APU

Shen Yongpeng1;Wang Yaonan1;Meng Bumin1;Yi Dihua2   

  1. 1.Hunan University,Changsha,410082
    2.BAIC Motor Electric Vehicle  Co.,  Ltd.,Beijing,102606
  • Online:2015-06-25 Published:2015-06-29
  • Supported by:
     
    National High-tech R&D Program of China (863 Program) (No. 2012AA111004);
    National Natural Science Foundation of China(No. 61104088)

增程式电动汽车增程器转速切换/功率跟随协调控制

申永鹏1;王耀南1;孟步敏1;易迪华2   

  1. 1.湖南大学,长沙,410082
    2.北汽新能源汽车有限公司,北京,102606
  • 基金资助:
    国家高技术研究发展计划(863计划)资助项目(2012AA111004);国家自然科学基金资助项目(61104088) 
    National High-tech R&D Program of China (863 Program) (No. 2012AA111004);
    National Natural Science Foundation of China(No. 61104088)

Abstract:

To  solve  the  cooperative control problem of the engine and generator in APU system,the speed switching-power  following  APU  cooperative control strategy was proposed  herein.Firstly,the power-speed  switching table  of  the engine was designed  according to  the optimal brake specific fuel consumption(BSFC)  curve.Then,a  second order sliding mode controller of the engine speed was designed,which was based on the engine mean value model.Meanwhile,the PWM rectifier output power  controller  was  designed,which was based  on  the  direct  power  control  algorithm.Through the closed-loop control of the engine speed and PWM rectifier power,the proposed control strategy forced the engine to  run along the optimal BSFC curve.Finally,the joint simulation model   was  developed based on AVL Cruise and MATLAB/Simulink.The simulation results show that the proposed APU cooperative control strategy is excellent  in  aspects of power following and speed controlling accuracy,battery voltage,current  and state of charge(SOC) fluctuations,as well as the operating points distributions.

Key words: range extender electric vehicle;auxiliary power unit(APU);cooperative control;second order sliding mode control;direct , power , control

摘要:

针对电动汽车增程器系统中的发动机、发电机协调控制问题,提出了一种转速切换/功率跟随增程器协调控制策略。首先根据发动机的最佳制动燃油消耗率曲线设计了发动机的功率-转速切换表。然后,分别设计了基于发动机平均值模型的发动机转速二阶滑模控制系统和基于电压定向直接功率控制的PWM整流器功率控制系统。通过对发动机转速和PWM整流器输出功率的闭环控制,使发动机沿着最佳制动燃油消耗率曲线运行。最后,在AVL Cruise和MATLAB/Simulink仿真环境下搭建了系统的联合仿真模型,仿真结果从增程器功率跟随效果,发动机转速控制效果,动力电池电压、电流和SOC波动范围以及发动机工作点分布等方面验证了该策略的有效性。

关键词: 增程式电动汽车, 增程器, 协调控制, 二阶滑模控制;直接功率控制

CLC Number: