High-power transmission power cable

Abstract

The invention discloses a high-power transmission power cable. The high-power transmission power cable sequentially comprises a combined water passing pipe layer, a fine copper wire harness layer, an isolating layer and a rubber layer from inside to outside, wherein the fine copper wire harness layer is arranged outside the combined water passing pipe layer, the isolating layer is arranged outside the fine copper wire harness layer in winding and coating modes, and the rubber layer is arranged on the outermost layer of the high-power transmission power cable in squeezing and coating modes. Control pairs are further arranged inside the fine copper wire harness layer, and the control pairs are tightly attached to the combined water passing pipe layer. The combined water passing pipe layer is composed of a cooling water pipe and a cold pipe closing layer which is arranged outside the cooling water pipe in a coating mode. The high-power transmission power cable is in the state of external natural cooling and center forced cooling in the working process, the control pairs are tightly attached to the cooling water pipe, insulating strength can be better maintained, thermal ageing is slowed down, and the stress is small when the cable is bent.

Description

technical field [0001] The invention relates to the field of wires and cables, in particular to a high-power transmission power cable. Background technique [0002] The power cable is used to transmit high-power continuous operation conditions, the use voltage is low, and the current is large. During use, due to the heat of the conductor resistance, a large amount of reactive power consumption will be generated after the cable heats up, and the aging of the cable and the oxidation of the conductor will be accelerated at the same time. [0003] The aging rate is doubled as the temperature rises by 8-10°C. For example, if the temperature of the electrical conductor is 65°C, the service life is 8 years. If it rises to 75°C, the service life is 4 years. Due to the large current and poor heat dissipation, the cable may When the temperature rises to about 90 ℃, not only the service life is only about 1 year, but also the cable loss is very large, so the cooling of the cable has gr...

AI Technical Summary

Problems solved by technology

[0003] The aging rate is doubled as the temperature rises by 8-10°C. For example, if the temperature of the electrical conductor is 65°C, the service life is 8 years. If it rises to 75°C, the service life is 4 years. Due to the large current and poor heat dissipation, the cable may When the temperature rises to about 90°C, not only the service life is only about 1 year, but also the loss of the cable is very large, so the cooling of the cable has great energy-saving value

Images