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Zhengzhou Metro Transit Power Supply System Harmonic Analysis and Impact Research
Pages: 43-48
Year: Issue:  20
Journal: Electrical Measurement & Instrumentation

Keyword:  metrotraction calculationAC-DC flow calculationharmonic power flow;
Abstract: 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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