The minimum energy consumption calculation model of high-speed trains was established. By utilizing the Pontryagin's maximum principle on the basis of the above calculation model,application of driving strategies of the maximum traction,uniform motion,coasting and the maximum braking, were found to be the conditions essential to energy-saving operation of high-speed trains. The influence of the braking efficiency on the driving strategies for energy saving was explored. In view of the low braking efficiency of the existing highspeed trains in China,the targeting energy-saving driving strategies were determined,and the transition points of the driving strategies were solved with the heuristic algorithm. The correctness of the traction and energy consumption calculation models was verified. The described energy-saving driving strategies for the existing high-speed trains were simulated and verified by example of a domestic high-speed railway line and a particular type of high-speed train running on it. Quantitative analyses were made and the results show as follows: When the running time is increased by 2. 1% and the braking efficiency is 0,energy saving can raise by 5. 05% to the maximum;energy saving decreases gradually when the braking efficiency grows,and when the braking efficiency is close to 1 ,the presented energy-saving driving strategies will not work anymore.%基于高速列车最小能耗计算模型,利用庞特里亚金极大值原理分析出最大牵引、匀速、惰行与最大制动4种操纵策略的应用是高速列车节能运行的必要条件.在此基础上,研究制动利用率对节能操纵策略的影响,针对国内既有高速列车制动利用率较低的特点,确定既有高速列车节能操纵策略,并通过启发式算法离线求解得到各操纵策略转换点.验证了本文所利用牵引计算和能耗计算模型的正确性;在此基础上,以国内某高速线路和高速列车为例,对本文提出的既有高速列车节能操纵策略进行仿真验证,量化分析发现:当运行时间增加约2.1％,若制动利用率为0,最高可节约5.05％的能量,随着制动利用率的提高,能量节约率逐渐下降,当制动利用率接近1时,本文所提出的节能操纵策略已不再适用.
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