基于EMTDC的电铁及云南电网电能质量联合仿真分析

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

结合云南电网及电气化铁道的实际工况,选取适用的牵引供电及电力系统电气元件数学模型;基于PSCAD/EMTDC仿真软件,建立电气元件仿真模型,搭建反映电铁及电力系统实际工况的联合仿真平台;采用项目实测的牵引变电所低压母线负荷数据,分析不同牵引变接线形式、电力系统运行方式及考虑轮流换相的工况下,电铁负荷对电力系统谐波和负序等电能质量指标的影响。仿真研究和理论分析表明,所建立的仿真平台能够较好的反映元件及系统的运行特性,其使用灵活性及仿真精度均能够满足实际项目需要。

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.