轨道车的电液混合功率迁移与耦合特性

摘要

Aimed at the shortcomings of existing electric rail vehicle,such as poor starting performance,large power impact and short endurance mileage,a new type of electro-hydraulic hybrid drive system is developed.A mathematical model of power flow is set up,and a coupling method of the relationship between electric power and hydraulic energy storage power is analyzed and determined.Based on driving conditions under a typical ramp,a power coupling strategy for different driving stages is formulated,and a simulation analysis is carried out by AMESim.The results show that an electro-hydraulic hybrid drive system not only improves starting performance up to 57％ and saves 61.7％ of power consumption in the early stage,but also basically eliminates the impact of electric power and saves 50％ of power consumption in the acceleration stage.%针对现有电力轨道车存在起步性能差、功率冲击大及续航里程短等缺点,研发了一套新型的电液混合驱动系统.建立了系统功率流的数学模型,分析并确定了电功率和液压储能功率之间的耦合方法.基于典型坡道下的行驶工况,制定了适用于不同行驶阶段的功率耦合策略,并利用AMESim软件进行仿真分析.结果表明:起步阶段,电液混合驱动系统可改善轨道车起步加速性能高达57％,并节约了61.7％的电耗;加速阶段,电液混合驱动系统可基本消除电功率冲击,并节约了50％的电耗.