Next generation train control – beyond 40,000 tonnes

Heavy haul train control is a multi-objective problem of safely meeting section run-times, conserving energy, and managing coupler forces. Heavy haul train consists globally are predominantly arranged with various forms of distributed power with locomotives at the head end and distributed mid, 2/3rd and/or tail end and banker positions. When distributed power configurations are controlled by humans the locomotives can only be operated synchronously or in two groups with independent controls. These limitations preclude the possibility of ultra-long train consists that span many changes in grade. To enable ultra-long train operation direct management of coupler load using independently controlled locomotive traction is required and potentially provides huge gains in network throughput for heavy haul and operational efficiency for freight networks. This paper will present two cases studies, an ultra-heavy train in excess of 40,000t and a downhill pit-to-port train consist also exceeding 40,000t. The paper will demonstrate the capability of the control algorithms to manage ultra-long trains with existing equipment and importantly on existing typical rail route topographies, how it can be used with current distributed power standards and the need for future development in this area.