What is OPGW optical cable? What are the applications of OPGW optical cable? OPGW optical cable, Optical Fiber Composite Overhead Ground Wire (also called optical fiber composite overhead ground wire).
The optical fiber is placed in the ground wire of the overhead high-voltage transmission line to form an optical fiber communication network on the transmission line. This structure has the dual functions of ground wire and communication, and is generally called OPGW optical cable.
OPGW optical cables are mainly used on 500KV, 220KV, and 110KV voltage level lines. Affected by line power outages, safety and other factors, they are mostly used on newly built lines.
The applicable characteristics of OPGW are: (1) Lines with high voltage exceeding 110kv , the gear distance is large (generally above 250M); (2) Easy to maintain, easy to solve line crossing problems, and its mechanical characteristics can meet the requirements of large line crossings; (3) The outer layer of OPGW is metal armored, which is resistant to high voltage power. There is no impact on corrosion and degradation; (4) OPGW requires power outages during construction, and power outage losses are large, so OPGW should be used in new high-voltage lines above 110kv; (5) Among the performance indicators of OPGW, the greater the short-circuit current, the more necessary it is. When a good conductor is armored, the tensile strength is correspondingly reduced. When the tensile strength is constant, to increase the short-circuit current capacity, the only way is to increase the metal cross-sectional area, which will lead to an increase in cable diameter and cable weight, which will affect the line. Tower strength raises safety concerns.
