混合动力船舶等效油耗最小能量管理策略

Equivalent Fuel Consumption Minimization Strategy for Hybrid Electric Ship

为了降低混合动力船舶的燃油消耗,同时解决传统等效油耗最小能量管理策略(ECMS)易导致动力设备处于恶劣工况的缺点,提出一种利用逻辑门限值规则对混合动力系统工作模式进行预识别的改进ECMS,并采用改进的蚁群算法对充放电等效因子进行离线优化。在船舶典型航行工况下,通过MATLAB/Simulink建立的船舶仿真模型进行逻辑门限值能量管理策略、等效因子分别取经验值和优化值的改进ECMS的仿真分析。结果表明:等效因子寻优后的改进ECMS有更好的燃油经济性,同时也利于保证电池荷电状态(SOC)平衡和动力设备的效率。

In order to reduce the fuel consumption of hybrid electric ships and solve the disadvantage of the traditional equivalent fuel consumption minimization strategy(ECMS),which is easy to lead to the power equipment in bad working conditions,an improved ECMS which uses logic threshold rule to pre-identify the operating mode of hybrid power system is proposed,and an improved ant colony algorithm is adopted to charge and discharge equivalent factor in the off-line optimization.Based on the ship simulation model established by MATLAB/Simulink under the typical sailing conditions,the simulation analyses of the logic threshold energy management strategy,the improved ECMS of equivalent factor takes the empirical value and the optimized value respectively are carried out.The results show that the improved ECMS after optimizing the equivalent factor has better fuel economy,and it is also beneficial to ensure the balance of the state of charge(SOC)of the battery and the efficiency of power equipment.