| With the rapid development of electric locomotive, the speed has been more and more faster in recent years. We enjoy more benefits while the bad aspects should be caused for concern at the same time. For example, the electric locomotive speed increases will lead to significantly increased risk of the pantograph-catenary offline.Radiated emission generated by the offline instant will impact the electrical equipment inside the vehicle and the electromagnetic environment field of the trackside buildings. It is related to the intensity of electromagnetic emission directly. At present, most studies are concentrated in the design and improvement of the pantograph-catenary system and off-line detection system, on the contrary, few studies are about the actual measurement of the electromagnetic radiation generated by the pantograph-catenary offline and the EMI to trackside buildings.The characteristic and the harm of offline arc are analyzed first in this paper, Test program of EMI generated by the offline arc has been developed according to the GB/T-24338-2(rail transport electromagnetic compatibility). Cheng-Guan high-speed rail has been selected to implement the test, including the vehicle’s EMI standard test and stepper field EMI test. The test results are compared with GB/T-24338and the offline arc dipole model is provided.The shielding effectiveness of trackside buildings are analyzed according to the test results and the computational model of reinforced concrete, finite difference time domain (FDTD) method is used in this paper. The electromagnetic shielding effectiveness of different diameter, different spacing of the steel mesh are analysed. Useful conclusions is obtained.Finally, electromagnetic environment assessment software is developed of trackside buildings in Visual C++. Based on the relevant parameters setting, the assessment of electromagnetic environmental of trackside buildings is finished. |
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