The Power Flow Simulation and Calculation Method for Metro Power Supply System Based on the Train-Network Coupling
Based on the analysis of the equivalent models of the traction transformer and the train in the existing metro power supply system (MPSS), this paper embeds the coupling relation between the metro traction power supply system (MTPSS) and the train operati
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Chengdu Yunda Technology Co., Ltd., Chengdu 611731, China [email protected] 2 Southwest Jiaotong University, Chengdu 610031, China [email protected]
Abstract. Based on the analysis of the equivalent models of the traction transformer and the train in the existing metro power supply system (MPSS), this paper embeds the coupling relation between the metro traction power supply system (MTPSS) and the train operation into the model and combines with the corresponding range of the output current, the voltage and the resistance of the 6 section type equivalent external characteristic curve of the 12-pulse rectifier unit to research and design the AC/DC power flow calculation method for the MPSS, this paper analyzes the operation efficiency and the power flow calculation error of the method. The result shows that this method can effectively improve the accuracy of the power flow value calculation and has the advantages of the fast calculation speed and the good real-time performance, besides the model can describe coupling relations between the train and traction network more accurately. Keywords: Metro Rectifier unit
Traction power supply system Power flow calculation
1 Introduction With the rapid development of the city rail transportation industry and the social economy, the people have higher requirements for the transportation’s comfort, rapidity, safety and punctuality, so it has important theoretical and practical significance to design the secure and punctual metro operation. Chinese MPSS mostly adopts the DC750 V or DC1500 V bilateral power supply mode [1], for this mode, the domestic and foreign scholars have made a lot of researches on the modeling method of the DC side of MTPSS and the related power flow calculation methods, the most significant results are the current loop model [2] and the node voltage model [3]. The loop current model is only suitable for the simple system consisting of the catenary, the rail and the return line, which is used to calculate the voltage and current of the catenary and the rail and the longitudinal distribution of the catenary; the node voltage model is widely applied to the catenary with arbitrary topology structure, which is also suitable for the catenary under the other power supply modes, it is widely used but © Springer Science+Business Media Singapore 2016 L. Zhang et al. (Eds.): AsiaSim 2016/SCS AutumnSim 2016, Part I, CCIS 643, pp. 514–525, 2016. DOI: 10.1007/978-981-10-2663-8_53
The Power Flow Simulation and Calculation Method
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rarely involves the modeling and the power flow calculation of the high-voltage and mid-voltage systems [4–7]. The literature [8] got the train location and the power distribution information by the Train Diagram based on the model of 12-pulse rectifier unit, which could calculate the power flow in the MPSS, but it always took the power flow value in the rated area of rectifier unit as the benchmark, so it would lead some errors in the calculation results. The literature [9] embedded the AC side into the DC side in t
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