不同续航里程动力辅助系统启停控制优化

Optimization of APU Start-stop Control for Diverse Mileage Ranges

针对某款增程式电动车,为满足不同负荷功率需求,制订了多点能量管理策略,以油耗最小为目标构建了动力辅助系统(APU)启停控制优化模型,以性能指标和电池循环寿命为约束,优化了不同工况不同行驶里程的APU启停控制参数,实现了续航里程自适应APU启停控制。结果表明:与优化前油耗相比,NEDC100/NEDC200、CUDC100/CUDC200分别减少15.87%/2.09%、42.24%/14.54%。对比优化前后能量消耗,得到同里程下减少油耗方式:单一负荷下,缩短APU工作时间;不同负荷情况下,延长中低负荷下工作时间,从而缩短高负荷下工作时间。

For a range-extended electric vehicle, a multi point energy management strategy was developed to meet different demands of power and energy. Then an optimization model of APU was formulated to achieve the target of minimum fuel consumption. In the constraints of performance index of range-extended electric vehicle and battery cycle life, optimization of control parameters of APU start-stop was performed by the SIMULINK model with diverse mileage ranges under different driving cycles to realize APU start-stop control for adaptive range. Compared with before optimization,the results show that fuel consumption is reduced by 15.87%/2.09% ,42.24%/14.54% respectively corresponding to NEDC100/200,CUDC100/200. Based on energy consumption comparisons before and after optimization,the fuel economy may be obtained through reducing APU operation time under the condition of single loads and transferring operation time from peak loads to medium loads and low loads under the condition of multiple loads.