基于车网耦合的高速铁路牵引网潮流计算

针对全并联自耦变压器(autotransformer,AT)网线路的特点,建立通用的多导体链式电路模型。在此基础上,将高速列车视为恒功率负荷并进行迭代,形成了"机车–牵引网"(简称车网)的耦合模型。考虑AT漏抗值和钢轨的对地电阻,对3种不同工况进行潮流分析。仿真结果表明,车网耦合下的潮流计算能很好地反映实际的功率分布特性,并且全并联AT网上下行线路具有较好的对称性。牵引网潮流计算为分析高速铁路不同工况下的功率流动、电压分布奠定了基础,同时也可用于分析牵引负荷对公用电网电能质量的影响。

Power Flow Calculation of High-speed Railway Traction Network Based on Train-network Coupling Systems

A uniform chain circuit model was built for all-parallel autotransformer(AT) network according to its lines characteristics.Based on this chain model,high-speed train was treated as a constant power load in this paper.The train-network coupling model was built by train power iteration.This paper has power flow analysis in three cases in consideration of the leakage impedance of ATs and rail toward earth.Results of simulation show that the power flow calculation,under the train-network coupling condition,can well illustrate the practical power flow characteristics.And,the up and down track of all-parallel AT network has a good symmetry.Power flow calculation of traction network provides a base for analysis of power flow and voltage distribution in different conditions of high-speed railway.Moreover,this work can also analyze the power quality effects from traction system to power system.