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Study on Shielding Effectiveness of Carriage for High-Speed Electric Multiple Units

Author: LuZuo
Tutor: WenYingHong
School: Beijing Jiaotong University
Course: Environmental Engineering
Keywords: High-speed EMU Shielding effectiveness Simulation
CLC: U266
Type: Master's thesis
Year: 2010
Downloads: 142
Quote: 0
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Abstract


In recent years, with the rapid development of China's high-speed rail, high-speed passenger train is the trend of the times. Compared with ordinary passenger trains, high-speed EMU traction system more power, wider range of distribution in the space, which has led to the electromagnetic environmental degradation in the high-speed EMU trains. At the same time, the number of high-speed EMU interior control equipment, communications equipment increased electronic equipment by external electromagnetic noise interference, it is likely to endanger the traffic safety, and have serious consequences. Anti-electromagnetic interference for high-speed EMU, past practice is to start from the equipment, improve the immunity of the sensitive equipment inside or decrease the emission of electromagnetic disturbance carriages power equipment, which is three elements from electromagnetic interference in sensitive equipment \From electromagnetic interference three elements in the route of transmission to start high-speed EMU cars as a whole, considering the shielding effect of the electromagnetic disturbance outside the cab, the car shielding effectiveness research and analysis of possible factors affecting the shielding effect, and strive to cut off the route of transmission electromagnetic disturbance. This study has laid a foundation for the next step to improve the EMU trains shielding effectiveness research to be adopted by this line of thinking to improve the electromagnetic environment of the interior, to provide protection for the the vehicle sensitive equipment to work and driving safety. Shielding principle analyzed, then field-testing a top speed of 380km / h of high-speed motor car group test items including EMU trains the electromagnetic environment and car equipment inside the electromagnetic environment, the spatial electromagnetic field inside space inside the low-frequency magnetic field, traction transformer output cable below the magnetic field, the traction converter below the magnetic field, a series of experimental data. This is the speed of 300km / h high-speed moving vehicles inside the vehicle electromagnetic environment the first time a comprehensive test, test data, get high-speed EMU trains electromagnetic harassment the main harassment source characteristics, thus the use of computer simulation software, in cash moving car body modeled on the establishment of the simulation model calculated the shielding effectiveness of the inside eight representative test points within the specified frequency range and analyzed. 24 On this basis, the establishment of the window shape, the window size, number of windows of the same body model, the calculation of the specified point of its internal shielding effectiveness analyzed by the window shape, size, quantity difference caused by shielding effectiveness differences, to find the law. Finally, it is proposed to improve compartment shielding effectiveness proposals aimed at blocking the route of transmission of electromagnetic disturbance from the source to improve the electromagnetic environment of the motor car interior.

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CLC: > Transportation > Rail transport > Locomotive works > EMU,EMU (power train )
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