What is the purpose of using OPGW cable?

The role of OPGW cable

Optical Power Ground Wire (OPGW): It can not only transmit communication and transmission line maintenance information within the power system, but also serve as a high-frequency channel, telecontrol signal and communication channel for power system relay protection. The line acts as lightning protection. It can also play an important role in the realization of integrated service digital communication network for newly built ultra-high voltage long-distance transmission lines.

Scope of application of OPGW fiber optic cable:

OPGW optical cables are mainly used on 500kV, 220kV, 110kV voltage level lines, and are mostly used on new lines due to line power outages, safety and other factors. OPGW light is suitable for lines with high voltage exceeding 110kV, and the span is large (generally more than 250m)

Features and advantages of OPGW cable:

1. It is easy to maintain, easy to solve the problem of line crossing, and its mechanical characteristics can meet the large crossing of the line;

2. The outer layer of Optical Power Ground Wire is metal armor, which has no effect on high voltage electrical corrosion and degradation;

3. OPGW must be powered off during construction, and the power outage loss is relatively large, so OPGW should be used in new high-voltage lines above 110kV;

4. In the performance indicators of OPGW, the greater the short-circuit current, the more armored conductors are required, and the tensile strength is correspondingly reduced. In the case of a certain tensile strength, to increase the short-circuit current capacity, only increase the metal Cross-sectional area, resulting in an increase in cable diameter and cable weight, which poses a safety issue to the strength of the line tower. .