High-voltage power cable for rail transit vehicle and technological process of high-voltage power cable for rail transit vehicle

Abstract

The invention discloses a high-voltage power cable for a rail transit vehicle and a technological process of the high-voltage power cable for the rail transit vehicle. The high-voltage power cable comprises soft tinned conductors, a semiconductive conductor shielding layer, an ultra-clean ethylene-propylene rubber insulating layer, a semiconductive insulating shielding layer, a metal shielding layer, an isolation jacket, an interlocking armor layer and a protective jacket. The soft tinned conductors are used for electric energy transmission and are sequentially sleeved with the semiconductive conductor shielding layer, the ultra-clean ethylene-propylene rubber insulating layer, the semiconductive insulating shielding layer, the metal shielding layer, the isolation jacket, the interlocking armor layer and the protective jacket. By means of the high-voltage power cable, the condition that when high-power and large-current electric energy transmission or supplying is needed in use of power cables for the rail transit vehicle, the multiple existing cables, meeting the related standards, for the rail transit vehicle have to be used in a parallel-connection mode is avoided, and the potential safety hazards that when any cable is broken, power supply is unstable, and even breakdown of a power supply system occurs are avoided.

Description

technical field [0001] The invention specifically relates to a high-voltage power cable for rail transit vehicles and its technological process, which is a high-voltage cable that provides high-power, high-current power at a rated voltage of 26 / 45kV or below for high-speed railway passenger cars, EMUs or heavy-duty trucks. . Background technique [0002] The railway is the main artery of my country's national economy and social development. The railway is in the leading position among the five major transportation modes in my country. The urban rail transit with high-speed rail, subway and light rail as the main mode and the railway transportation with heavy-duty trucks as the main mode have expanded capacity. Efficiency is the main form and development direction of urban passenger transport and railway freight transport in the future. [0003] With the in-depth cooperation between my country and foreign rail transit vehicle manufacturing giants in recent years, various prod...

AI Technical Summary

Problems solved by technology

This method of paralleling not only increases the limited car body space, but at the same time, the cables for rail vehicle body wiring are in the environment of bending and vibration for a long time. This connection method can easily cause individual cable conductors to break. In practical applications When any one of them breaks, the entire line will be in a state of unstable power supply or even paralyzed, which poses a great threat to the safety of trains

[0007] For AC cables, the cable skin effect and proximity effect are also a very difficult problem. Since the phase of the AC is changing all the time, the magnetic field induced by the changing electric field around the cable is also changing all the time. Due to the magnetic field The momentary change of the dynamic energy cable will generate a new induced current opposite to the direction of the current in the power cable, resulting in the instability of the current provided by the kinetic energy cable, which will also pose a great threat to the safety of the train.

[0008] Due to the narrow space for cable wiring of rail transit vehicles, and serious oil pollution in some spaces, the cables cannot always be laid horizontally or vertically in a clean, dry space, and are often bent and coiled and soaked in mineral oil or fuel oil Among them, if the oil resistance of the cable is not good, the performance of its insulation sheath will be greatly reduced. Therefore, it is also necessary to ensure that the cable has good flexibility and oil resistance to ensure the long-term safe use of the cable in this special environment.

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