TAROS Computer Simulation Software for DC and AC Traction Power Systems: Methods and Applications

Abstract

This paper describes the computer simulation methods for dc traction power systems and ac power traction power systems that have been used to develop the computer simulator TAROS® at Gannett Fleming. The simulator has been designed and developed to support both load flow analysis and fault analysis. The paper also presents some examples of practical applications of the simulator in engineering and design under various operational conditions that may be encountered in transit and rail systems, such as normal, abnormal and fault conditions. Examples include: electric load cycles in various system components for their rating and size selection or verification; distribution of traction return currents in return conductors and ground for electromagnetic interference assessment; touch and step voltage analysis for the design of the traction return system grounding and bonding to meet safety requirements; and fault calculations for relay protection coordination.