The Electromagnetic Transient Analysis Of High-speed EMU Trains Passing Articulated Phase Insulator

With the improvement of China’s comprehensive national strength,the speed of China’s high-speed EMU trains has reached more than 250 kilometers per hour due to the speed increase of China’s railway.The network between the traction power supply system and the train is related to the stable and safe operation of the train.In China’s electrified railway system,anchor joint automatic electrical phase separation structure is often used in high-speed railways.When high-speed EMUS trains are running at high speed,the pantograph of the train may produce overvoltage with the contact line and neutral line,especially when passing through the phase separation zone,which may seriously cause the breakdown of the protective gap on the roof of the train and the trip of the traction substation.Therefore,it is of great significance to analyze the transient process of electric phase separation through joint of high-speed EMU trains.Firstly,this paper introduces the electromagnetic transient,the structure of the electric phase separation,the electric phase separation of the train and the power supply mode of the electrified railway.Then,the transient process generated in the process of the joint electric phase separation of the EMU train is calculated and analyzed.Finally,the expression of the voltage on the pantograph of the train when the train passes the joint electric phase separation is summarized.Then,under the background of the AT power supply way,using the simulation software PSCAD high-speed bullet train is established through joint type electric simulation model of split phase,and by adding arc model better simulation of CLP split phase transient state process,finally the neutral line voltage waveform is obtained by simulation,we compare the simulation results and theoretical analysis and calculation,and compares the direct power supply mode in the literature the pantograph overvoltage when the train too phase,the results are similar.At last,the measures to limit the over-voltage of the electric phase splitting through the joint of the high-speed EMU train are put forward,and the simulation analysis proves that the measures can effectively reduce the over-voltage amplitude.