High-Speed Rail Feeder Cable Sheath Induced Voltage And Circulation Based On Finite Element Analysis

With the rapid development of China’s high-speed railway, China’s high-speed railway operating mileage remained the world’s top high-speed rail mileage, safety issues are particularly important in the actual operation. At present, China’s high-speed railway mainly AT power supply, the feeder cable is to transmit power from traction substation to the catenary important power transmission channel, and single AC 27.5kV XLPE cables meet the high-speed rail traction and load flow requirements. When an alternating current through the feeder cable traction, will produce the feeder cable metal sheath induced voltage, the induced voltage is too high will cause harm to the safe operation of the cable, and even the maintenance person would threaten the safety of staff; Therefore, at the same time will produce circulation in the cable metal sheath connected to earth for the circuit, both caused by energy loss, can also cause the cable temperature, damage to cable insulation. Therefore, the feeder cable metal sheath of the induced voltage and circulating heat for scientific computing and analysis of the actual safety is instructive. In this paper, using the finite element method has been studied high-speed railway 27.5kV feeder cable metal sheath electromagnetic field and temperature field.Firstly, the structure and basic parameters of the traction power supply systems and high-speed rail power supply feeder cable, to analyze the reasons high-speed rail feeder cable sheath induced voltage and circulating current, harm and influence, for high-speed railway feeder dedicated 27.5kV single post XLPE cable structural properties, according to the principle of electromagnetic and circuit knowledge, analytical calculation of high-speed rail feeder cable metal sheath induced voltage and circulation.Secondly, in the finite element simulation software for cable trench laying feeder cable for three-dimensional modeling, build high-speed rail feeder cables of three-dimensional simulation model, simulation analysis circuit at the number of different cable lengths, distance, conductor current, the cable between the circuit arrangement, Effect of induced voltage metal sheath grounding methods.Again, in order to determine the high-speed railway feeder cable runs in circulation, using the finite element method to the cable metal shield eddy currents are calculated to analyze the influence of different cable extent of damage to the metal sheath circulation; indirect coupling method to analyze high-speed Railway Line cable loss and temperature rise Electric-Magnetic-thermal coupling, analyze temperature distribution and temperature changes.Finally, the use of parametric design language for secondary development of programming languages, using macro technology management command, realized Electric-Magnetic-analysis parameters and applying heat coupled load parameters and Solution, and parameterization results show. Electromagnetic fields and temperature fields feeder cable to provide more convenient interface to calculate and simplify the operation provides efficient simulation.