铁路交流供电货运列车节能优化控制研究

Study on Optimal Energy-Efficient Control of AC Freight Train

列车节能优化控制可有效降低运行能耗,交流供电铁路电分相区段列车过电分相时必须为惰性工况,在过电分相前后区段如何控制列车使运行能耗最低是货运列车节能优化的关键问题。针对交流供电货运列车节能优化控制问题,提出以列车速度波动最小为优化目标,以列车惰行工况通过电分相为约束条件,建立了考虑电分相的货运列车节能最优控制模型,研究货运列车节能优化控制策略。基于极大值原理分析:电分相在恒速区内时,列车过分相的最优控制策略为"最大牵引-惰行-最大牵引"的最优性;电分相在恒速区外时,列车在电分相前是最大牵引工况的最优控制策略为"惰行-最大牵引"的最优性;列车在电分相前是最大制动工况的最优控制策略为"最大制动-惰行"的最优性,并推导证明了最优控制策略的存在性和唯一性。通过与优秀司机控制进行比较,仿真结果证明,所提节能优化控制算法的可行性和正确性。

Energy-efficient control of Train can effectively reduce the operation energy consumption. For the Freight Trains through the neutral section,the control strategy of train must be coasting. How to reduce the energy consumption is the key problem of AC power freight train control in the nearby neutral section. For the energy-efficient control of railway electric freight train,with the optimal target of minimum velocity fluctuation and the control strategy of coasting on the neutral section,an optimal control model of the freight train operation was established in this paper. The optimal manipulation strategies were researched while a train is on the neutral section. The optimality of the strategy of"Full Power-Coasting Full Power"should be applied when the neutral section is in the constant velocity section."Coasting-Full Power"should be applied when the strategy of train is Full Power before a neutral section. "Full Break-Coasting"should be applied when the strategy of train is Full Break before a neutral section. The existence and uniqueness of optimal control strategy were proved. The simulation results indicate that the algorithm in this paper is correct and efficient.