United Simulation Analysis for Power Quality of Electrified Railway and Yunnan Power System Based on EMTDC

Relating the practical operating condition,select applicable mathematical models for electric element in traction supply system and power system;Created simulation models and united simulation platform according operating condition,using actual data measured on traction substation low voltage side bus,analysed the effect on power quality aboat harmonics and negative sequence with deffrenct connection of traction transformer,dissimilar operation mode of system,considering the rotation changing phase.Simulation and theoretical analysis proved that the platform can reflect the operation character well and it is flexible and accuracy enough for practical project.