How much do you know about commonly used optical power cables? (Part 3)

1.Packageoptical cableAD-Lash metal-free aerial (All-Dielectric Lashed Cable) and metal-free winding optical cable

GWWOP (GroundWireWrappedOpticalFiberCable) optical cable is sometimes referred to collectively asfiber optic cableadditional – OPAC, which is a cheap and fast way to build a fiber optic communication network on power lines.
They use automatic binding machines and winders to bind and wind optical cables on ground wires or phase wires. Their common advantages are: optical cables are lightweight, low cost, and quick to install. It can be installed on the ground wire or 10kV/35kV phase line without power cut, the common disadvantage is that since they all use organic synthetic materials as outer sheath, they cannot withstand the high temperature generated by the phase wire or the ground wire. when the line is short circuit.The aging of the outer shell material requires special machinery during construction, and there are many problems in terms of construction feasibility and safety, and it is vulnerable to external damage, such as bird damage, gunshots, etc ., so it has not been solved in the power system Wide range of applications. But in the world, this kind of technology has not been eliminated or abandoned, and it is still applied in a considerable range.

2.Fiber Optic Composite Cable

Fiber optic composite cable is mainly similar to OPPC. The fiber optic unit is combined with the cable, so that the cable has the dual functions of phase line and communication. Fiber optic composite cables include OPLC low voltage fiber optic composite cables, OPMC medium voltage fiber optic composite cables and high voltage fiber optic composite cables which are now used in high voltage cables (such as submarine power cables 110 kV, 220 kV submarine cables). power cables and some ground cables).
OPMC medium voltage fiber optic composite cable is a medium voltage intelligent composite cable for 6kV~35kV rated voltage power system. OPMC optical fiber composite medium voltage cable is a kind of optical fiber composite medium voltage cable, which includes cable core, cable core tape layer and outer sheath. There are power transmission cables and fillers that block water in the cable core. Each power transmission cable is composed of a conductor It is composed of a conductor shielding layer, an insulation layer, an insulating shielding layer and a metal shielding layer in turn, and a loose tube with an optical fiber The inside is provided in the core of the cable, and a non-metallic reinforcing layer and sheath are sequentially covered outside the loose tube. A fiber optic communication unit composed of layers, an inner sheath and a shielding layer of Steel tape are provided sequentially between the tape layer of the cable core and the outer sheath.