Parallel computer simulation of autotransformer-fed AC traction networks

Simulation of electrical conditions in power lines and rails in an on-line mode in AC and DC electrified railways is necessary for effective engineering design. A description is given of the use of a parallel computer to simulate voltages along an autotransformer-fed AC railway. The algorithm, based on the solution of algebraic equations for a single train, produces a faster-than-real-time continuous display of the catenary and rail voltages, with a historical record of train voltage as the train moves along the section. The simulation implemented enables parametric analyses to be made to optimize the power feeding, and shows that operation with constant current, rather than constant power, leads to better regulation of catenary voltage