Model Establishment And Simulation Of Traction Power Supply System For Gaoxin Line

Electrified railway has become the development direction of domestic railway,the traditional revamping/expansion of electrification railway is comprehensive,electrified railway in our country's construction speed is very fast in recent years,the country's railway construction investment has been increasing,the quantity and are among the world top of the existing railway,the railway construction and the corresponding research work are followed.Under the premise of satisfying high speed and heavy load,it is necessary to reduce the construction cost as much as possible and find the optimal construction scheme.But for different railway construction conditions,different railway demand,investment restrictions,also cannot achieve the comprehensive construction of high speed railway,so electrified railway still plays an important role,According to different situations,there are various power supply modes,so it is of great significance to study the related properties of electrified railway.This paper works as follows:(1)This paper mainly studies the establishment of equivalent model of full parallel direct power supply system based on high new line.Based on the study of the classical theory of Carson,according to the actual power network structure,the analysis of the topological relationship between the conductor and should be related to the construction of data and the traction power supply system operation data,the parallel transmission lines of the traction power supply system between impedance and admittance calculation,based on the operating conditions of a transmission line,will meet the requirements of simplified parallel wires,get the equivalent model.Then according to the operating principle of the power supply system,the voltage,current level and short circuit impedance are theoretically deduced.(2)Using MATLAB simulink module in the traction power supply system simulation,first of all,on the basis of the theoretical calculation,structures,catenary equivalent simulation model,according to the principle of different types of traction transformer corresponding transformer equivalent model is established,and according to the catenary and traction transformer topology relationship,establish the equivalent model of the traction power supply system in parallel.According to the theoretical calculation data,the relevant parameters of the simulation model are set and the relevant data of the simulation model are measured.The statistical conclusion of the measured data in xintun traction substation is used for comparative analysis with the statistical conclusion of the measured data of the simulation model to verify the accuracy of the simulation model.By using the correct and reasonable equivalent simulation model,the effects of various fault types on the traction power supply system are simulated,and then the corresponding parameter changes are studied.In this way,the corresponding solutions can be formulated and reasonable Suggestions can be put forward.