Correctional DP-Based Energy Management Strategy of Plug-In Hybrid Electric Bus for City-Bus Route
Correctional DP-Based Energy Management Strategy of Plug-In Hybrid Electric Bus for City-Bus Route
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DOI：
10.1109/tvt.2014.2352357
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发表时间：
2015-07
影响因子：
6.8
通讯作者：
Liang Li;Chao Yang;Yahui Zhang;Lipeng Zhang;Jian Song
中科院分区：
文献类型：
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作者：
Liang Li;Chao Yang;Yahui Zhang;Lipeng Zhang;Jian Song
典型的插电式混合动力电动公交车(PHEB)配备了快速充电的钛酸锂电池，可以满足典型城市公交路线的约70%的里程，已在中国许多城市采用。考虑到行驶周期的详细信息可以通过历史驾驶数据和在线估计方法来推断，因此有可能将基于动态规划(DP)的全局最优能量管理策略应用于这些PHEB。然而，在给定的行驶周期内，道路坡度或可变荷载可能会引起行驶阻力的瞬时波动。同时，带有自动机械变速器(AMT)的单轴并联结构可能会限制基于DP的策略的最佳能量分配的可实施性。因此，本文提出了一种新的修正DP算法，以平衡燃油经济性和驾驶性能的优化。仿真结果表明，结合AMT换档校正逻辑，所提出的能量管理策略可以保证发动机和电机工作在能量分配最优的高效区，同时保持在路面坡度和负载变化时的行驶性能。该方法可为中国汽车动力总成系统配置成本较低的典型PHEB提供技术解决方案。
Typical plug-in hybrid electric buses (PHEBs) with a fast-charged lithium titanate battery, which might fulfill about 70% of the distance of a representative city-bus route, have been adopted in many Chinese cities. Considering that the detailed information of the driving cycle could be deduced with the historical driving data and online estimation methods, there might be an opportunity for applying the dynamic programming (DP)-based global optimal energy management strategy for these PHEBs. However, road slopes or variable loads might induce transient fluctuations of the driving resistance in a given driving cycle. Meanwhile, the single-shaft parallel configuration, with automatic mechanical transmission (AMT), might constrain the implementability of the optimal energy distribution from a DP-based strategy. Therefore, in this paper, a novel correctional DP algorithm is brought forward to balance the optimization of fuel economy and drivability. Simulation results demonstrate that, integrated with the correctional logic of AMT gear shifting, the proposed energy management strategy can guarantee that the engine and the electric machine work in the high-efficiency area with optimal energy distribution, while keeping drivability in the variation of road slope and loads. The proposed method might give a technical solution to these typical PHEBs with a lower cost system configuration of the powertrain in China.