Author(s)

R.J. Hill & Y. Cai

Abstract

Simulation of rail voltage and earth current in a PC-based traction power simulator R.J. Hill, Y. Cai of EWromc aW EWncaf ABSTRACT Electrical circuit simulation by setting up nodal voltage equations and inverting a conductance matrix is a powerful CAE tool. Running large models on PCs, however, requires economic computing and storage requirements. This paper describes an algorithm for compacting intermediate storage necessary for solving circuit models with a large, sparse conductance matrix. The algorithm is based on targeted directed elimination followed by Gaussian elimination with back substitution. An example is given of an electrical calculation in a timestepping railway traction simulator. The circuit represents a double-track light rail system with one branch. Outputs are given for train voltage, substation busbar feeding conditions and rail voltage, the latter also giving information about earth current. INTRODUCTION Simulation of electric railway traction net

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