Study On Electromagnetic Disturbance Characteristic Of Pantograph-catenary Systems Of High-speed EMU

At present, the high-speed rail system in China is the most comprehensive in the worldwhich has the strongest systems integration, the longest operating mileage, the fastest overalltrip speed, and the largest scale of construction. It means that China has entered a new era ofcomprehensive high-speed rail. Under this condition, the high-speed electrified railwayelectromagnetic compatibility issue is worthy of our attention. The dissertation studies onelectromagnetic disturbance characteristic of pantograph-catenary systems of high-speedelectric multiple units (EMU). The main contents of the dissertation are as follows:Firstly, the development of high-speed rail in china is expounded briefly and electrifiedrailway and high-speed EMU are introduced. Then the electromagnetic environment of thehigh-speed EMU and the electromagnetic disturbance of pantograph-catenary systems areelaborated and analysed.Secondly, the cause of pantograph-catenary detachment is analysed in detail, also thecharacteristics and hazards are introduced. Then the dissertation further elaborates electric arcphenomenon of pantograph-catenary through the theoretical analysis of the basic process andthe basic form of the gas discharge. By theoretical analysis and electrical parameters,Alternative Transient Program-Electromagnetic Transients Program (ATP-EMTP) software isused to establish the model of pantograph-catenary detachment, and simulate at differenttimes in different duration to acquire the over-voltage waveform and the catenary’s voltagewaveform. After that Mayr arc model of pantograph-catenary is established inMATLAB/Simulink software, and the electric arc voltage characteristics ofpantograph-catenary are acquired.Thirdly, some ways of the locomotive passing the phase insulator are introduced in detail,this dissertation focuses on the high-speed EMU process of auto-passing neutral section, andcompletes theoretical analysis of electrical process and electrical parameters. The EMUautomatic passing phase equivalent model is established by ATP-EMTP software, throughsimulation, voltage waveforms of this process on both sides of main disconnector anddisturbance voltage and disturbance current on endfeed of train are all acquired. Meanwhile,by plenty of simulations, disturbance voltage amplitude in the case of different phase angles isobtained. At the same time the comparison with the waveform measured verifies thecorrectness of the simulation model.Finally, the Mayr arc model of pantograph-catenary is established based on FEKOelectromagnetic field simulation software to study on arc electromagnetic radiation situation.The arc of pantograph-catenary distribution of electromagnetic waves in space is obtained byplenty of simulation experiments, the dissertation focuses on the attenuation characteristics of the rail on both sides and the attenuation characteristics at the top of the vehicle, as well as theshielding effect of the large hollow aluminum bodywork. In addition, the dissertationsimulates arc radiation in the case of multi-lines and focuses on the influence to transversepropagation when there are several catenaries.