Title

Improving Regenerative Energy Receptivity in Metro Transit Systems: Coordinated Train Control Algorithm

Document Type

Journal Article

Publication Date

2015

Subject Area

mode - subway/metro, technology - alternative fuels, technology - automatic vehicle monitoring, operations - coordination

Keywords

automatic train operation (ATO), regenerative energy, energy saving, metro transit, energy-efficient timetables

Abstract

Algorithms for current automatic train operation (ATO) focus mainly on reducing the mechanical energy of motion for a single train within an existing timetable. However, the reuse of regenerative energy is another factor that contributes to energy consumption and conservation in multitrain networks. To improve regenerative energy receptivity and energy savings in a bidirectional metro transit network, this study formulated a coordinated train control algorithm that was based on genetic algorithm techniques. The energy saving potential of different station departure time intervals between two opposing trains (synchronization time) was tested. Simulation on the Visual C++ platform demonstrated that the algorithm could provide an optimal train speed profile with better energy performance while also satisfying operational constraints. Different synchronization times have different optimization ratios. This research was another step to facilitate the development of an ATO control algorithm that considers overall energy consumption. Increased knowledge of the influence of synchronization time at stations on energy consumption in regenerative multitrain networks will also aid in the design of more energy-efficient timetables.

Rights

Permission to publish the abstract has been given by Transportation Research Board, Washington, copyright remains with them.