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Pulse overvoltage suppressed high voltage feeder cables with magnetic shielding/dielectric layer

A technology of magnetic shielding and feeder cables, which is applied to power cables with shielding layers/conductive layers, power cables, and bendable cables, etc. It can solve problems such as repetitive pulse overvoltage suppression and system electromagnetic interference, and avoid Effects of electromagnetic interference, prolonging service life, and suppressing spectral components

Active Publication Date: 2018-02-23
TONGJI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to solve the problem that the common feeder cable in the prior art cannot effectively suppress the repetitive pulse overvoltage, resulting in serious electromagnetic interference in the system

Method used

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  • Pulse overvoltage suppressed high voltage feeder cables with magnetic shielding/dielectric layer
  • Pulse overvoltage suppressed high voltage feeder cables with magnetic shielding/dielectric layer
  • Pulse overvoltage suppressed high voltage feeder cables with magnetic shielding/dielectric layer

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Embodiment Construction

[0045] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0046] Such as figure 1 As shown, the pulse overvoltage suppression high-voltage feeder cable with magnetic shielding / dielectric layer provided in this embodiment includes a cable core 1, an inner insulating layer 2, a magnetic shielding / dielectric layer 3, Outer insulating layer 4, metal protective sheath 5 and rubber sheath 6. Cable core 1 is a cable core conductor for common feeder cables.

[0047] In order to ensure that the magnetic shielding / dielectric layer 3 has good high magnetic permeability and high dielectric constant, the magnetic shielding / dielectric layer 3 is compounded by mixing magnetic powder and dielectric powder into a flexible insulating medium in a preset ratio , to gener...

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Abstract

The invention relates to the technical field of cable devices, and particularly relates to an impulse overvoltage-suppressing high-voltage feed cable with a magnetic shielding / dielectric layer, which comprises a cable core, an inner insulated layer, the magnetic shielding / dielectric layer, an outer insulated layer, a metal protection sleeve and a rubber protection sleeve sleeved sequentially from inside to outside, wherein magnetic powder and dielectric powder are mixed in a flexible insulated medium at a preset ratio to be composite to form the magnetic shielding / dielectric layer; the magnetic powder has a preset magnetic permeability; and the dielectric powder has a preset dielectric constant. According to the impulse overvoltage-suppressing high-voltage feed cable with the magnetic shielding / dielectric layer, on the basis of a common feed cable, the magnetic shielding / dielectric layer is added between the cable core and the outer insulated layer to form a filter circuit, the filter circuit can effectively suppress repeated impulse overvoltage, the system can be prevented from a serious electromagnetic interference phenomenon, and the service life is thus prolonged.

Description

technical field [0001] The invention relates to the technical field of cable equipment, in particular to a pulse overvoltage suppression high-voltage feeder cable with a magnetic shielding / dielectric layer. Background technique [0002] Due to its excellent speed regulation performance, high safety and reliability, high equipment utilization rate and good power saving effect, frequency conversion speed regulation technology is widely used in electric drives in rail transit and other fields. A notable feature of the application of power transmission to rail transit is large capacity (greater than 10MW) and high voltage (higher than 20kV), which usually requires the use of large-capacity high-voltage feeder cables to realize power transmission. However, ordinary large-capacity high-voltage feeder cables transmit the pulse voltage output by the power electronic components of the frequency converter, which will cause repetitive pulse overvoltage problems, because the rising edge...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B7/17H01B9/02H01B7/04H01B7/02
CPCH01B7/0216H01B7/04H01B7/17H01B9/02H01B9/021
Inventor 黄靖宇唐章宏李君王群曹强陈恒高阳张严生张龙汪鹏尚立威王东洲
Owner TONGJI UNIV
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