Equipotential optical fiber unit for high-voltage photoelectric composite cable and manufacturing method thereof

Abstract

The invention discloses an equipotential optical fiber unit for a high-voltage photoelectric composite cable. The equipotential optical fiber unit for the high-voltage photoelectric composite cable is characterized by being sequentially composed of optical fibers, water blocking factice specially used for filling the optical fiber unit, a metal protection tube, a semi-conductive plastic reinforcing layer, a metal wire armor layer and a semi-conductive plastic outer protection layer from inside to outside. Each protection layer protects electrical connection through metal and non-metal materials and all the protection layers are equipotential. Under the effect of an electric field of a power cable, potential difference is not caused between the metal protection layer and the non-metal protection layer, and an optical unit integrity and other structures of the photoelectric composite cable form an equipotential body, and therefore the potential difference does not exist between the optical unit and other structures of the cable, the optical unit will not be broken through due to the fact that induced voltage is too high. In addition, the space between the optical unit and a high-voltage cable core will not be broken through, safety of the optical unit and a cable body is guaranteed, and the service life of the cable is prolonged.

Description

technical field [0001] The invention relates to an equipotential optical fiber unit for a high-voltage photoelectric composite cable and a preparation method thereof, in particular to an equipotential optical fiber unit for a high-voltage photoelectric composite cable that is resistant to breakdown and does not generate potential differences and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of my country's power grid construction, power optical fiber units used for power information transmission and control have been developed rapidly, such as power optical fiber unit overhead ground wire (OPGW), metal-free self-supporting power optical cable (ADSS) , Power optical cable (OPPC), etc. have been widely used in long-distance transmission lines and urban overhead lines. Optical fiber unit composite submarine cables across rivers, lakes and seas, submarine photoelectric composite cables for power supply on offshore oil plat...

AI Technical Summary

Problems solved by technology

However, due to the potential difference between the ordinary non-metallic optical unit and its surrounding cable structure, the induced voltage in the metal element in the optical fiber unit is too h

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