A connection method of ultra-high voltage composite cable for smart grid

Abstract

The invention discloses an ultrahigh-voltage power composite cable for an intelligent power grid and a connection method thereof, wherein the ultrahigh-voltage power composite cable comprises a cable conductor, and a conductor shielding layer, an insulating layer, an insulating shielding layer, a semi-conductive water-blocking tape layer, a corrugated alumium sheath layer, an anticorrosion layer and a non-metallic outer sheath layer, all of which orderly cover the cable conductor, wherein an optical fiber is arranged in the middle part of the cable conductor; the ultrahigh-voltage power composite cable further comprises a metal supporting spiral tube which is arranged in the cable conductor and provides mechanical protection for the optical fiber; the optical fiber is arranged in the spiral tube made of a metal. The ultrahigh-voltage power composite cable for the intelligent power grid is capable of providing effective mechanical protection for the optical fiber and also guaranteeing the bendability of the cable, and moreover, the technical problem of the connection of a photoelectric composite cable with the optical fiber arranged in the cable conductor thereof is solved.

Description

technical field [0001] The invention relates to the field of wires and cables, in particular to a method for connecting ultra-high voltage composite cables for smart grids. Background technique [0002] At present, power systems at home and abroad have generally used optical fiber to detect the real-time temperature distribution of the entire cable line, and to monitor the operating status of the cable system in real time, including real-time faults, cable operating status at different loads, ampacity analysis, and cable tunnel fire alarms. [0003] At the end of the 1990s in China, the optical cable was attached to the power cable to collect data on the operating temperature of the cable, such as figure 1 As shown, this is the original Generation I technology. Obviously, since the power cable and the optical fiber 3 are separated, external factors (airflow, sunlight, etc.) will affect the measurement accuracy, and maintenance is also inconvenient. [0004] From 2005 to 20...

AI Technical Summary

Problems solved by technology

However, the technical difficulty of joints for such cables has limited its popularization and application

The existing conductor connection technology cannot solve the connection of the optical cable part

Current conductor technology uses spot crimping, ring crimping, welded bolting, which can severely deform the cable conductors and will undoubtedly damage the cable if it is placed in the conductor

If the conductor adopts welding technology, the optical cable will be burned at the welding temperature

Images