Traction Power Supply System Modeling And Feeder Protection

With the rapid development of high-speed railway in china, high speed-rail increase more and more important in the city transport system. Ensure the security and stability of the MTR has become a focus of attention and study. As an important part, traction power supply system became a top priority. Computer high-speed railway protection methods generally have the following ways:Three adaptive distance protection, trip current protection, over current protection, adaptive current increment protection, inverse time overload protection, TV break detection, catenary heat protection, an automatic re-closing, the partitions, opening and closing of the inspection A pressure element, the fault distance, etc. Collected from the field to the current wave of view, regardless of fault current or the normal operation of the current, are relatively similar. Therefore, to distinguish between these similar need for a careful analysis of the wave power system features high-speed railway, the establishment of the normal operation of high-speed railway and the failure (short circuit) when the model for the study and protection equipment, provide the basis for performance testing. Based on Matlab/Simulink to establish high-speed railway traction power supply system model, by changing the parameters, the simulation modelThere are some attributions in the paper:1,Depth study the various existing high-speed railway power supply and transformer connection.2,A single model based on the current distribution on the basis of research methods derived AT the end of double track in parallel under the current distribution of traction power supply as well as short-circuit current.3,Research protection of existing methods, derive based on partial kurtosis fault current protection block diagram of the method.4,Using Matlab/Simulink, modele important parts of the high-speed rail.