System analysis within the traction power system is vital to the design and operation ofudan electrified railway. Loads in traction power systems are often characterised by their mobility,udwide range of power variations, regeneration and service dependence. In addition, the feedingudsystems may take different forms in AC electrified railways. Comprehensive system studies areudusually carried out by computer simulation. A number of traction power simulators have beenudavailable and they allow calculation of electrical interaction among trains and deterministicudsolutions of the power network. In the paper, a different approach is presented to enable load-flowudanalysis on various feeding systems and service demands in AC railways by adopting probabilisticudtechniques. It is intended to provide a different viewpoint to the load condition. Simulation resultsudare given to verify the probabilistic-load-flow models.
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