Modeling for Preliminary Stray Current Design Assessments: The Effect of Crosstrack Regeneration Supply

Simulators of different approaches and scales have been reported in the literature in an attempt to investigate the generation and impact of stray currents resulting from the operation of dc rail transit systems. Bearing in mind the existing methods for stray current modeling and control, this paper offers an important modeling advancement. A model is developed to quantitatively assess the more complex stray current picture arising from the effect of crosstrack regeneration supply. Crosstrack regeneration refers to the case where a train in one tunnel is collecting current from a regenerating train in an adjacent tunnel, as a power-saving endeavor.