结合郑州轨道交通一号线牵引列车的电气参数，对四种负载工况下牵引运行时列车从牵引网获取的最大功率进行估算，计算列车牵引负荷；针对列车在初期、近期、远期以及典型负载工况下牵引运行的情况，利用MATLAB/Simulink软件建立郑州地铁供电系统交流侧仿真模型，通过与M文件进行交互，实现了城市轨道交通交直流潮流计算；建立整流机组的谐波源模型，结合各元件的谐波数学模型形成等值电路，编写相应程序分析谐波潮流，根据计算结果分析郑州轨道交通的谐波特性以及对城市配网的影响程度。%According to the electrical parameters of Zhengzhou metro transit line 1 ,the maximum power of the subway train acquired from the traction networks in four kinds of load conditions has been estimated and the train tranction load will be calculated. Then the mathematical models of traction load are built on the basis of the results. Taking ad-vantage of Simulink tool in MATLAB,the AC simulation models of the metro power system are built when the train is towed in early,short,long term and typical kinds of load conditions respectively,and the AC-DC power flow calcu-lations are completed through the interactive operation with M-files. Besides,an equivalent model of 24-pulse rec-tifier has been set up and the compute programs have been made to calculate the harmonic power flow by forming the harmonic equivalent circuit with each harmonic mathematical model. Finally,the harmonic characteristics of Zheng-zhou Metro and the influences of harmonics on urban distribution network are analyzed according to the calculation re-sults of harmonic power flow.
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