Energy-efficient control for metros with dynamic losses of traction power system

Abstract

Energy-efficient control is a crucial energy saving measure for the metro system. A more practical model can further improve the energy performance of the train. In this paper, the energy consumption model considering dynamic losses of traction power system is proposed. The optimal control problem coupling with traction power system and vehicle dynamics model is formulated. A modified dynamic programming algorithm is implemented to optimize train speed profiles. The differences between models with and without dynamic losses of traction power system are evaluated by case studies, and the effectiveness of the proposed method is demonstrated by the comparison to the automatic train operation data of Guangzhou Metro Line 8, China.