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Utility Applications of Fiber-Optic Distributed Strain and Temperature Sensors

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Utility Applications of Fiber-Optic Distributed Strain and Temperature Sensors

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Since the early 1980’s utility companies have been using optical ground wire (OPGW) in lieu of normal ground wire on high-voltage transmission lines. The basic function of the OPGW cable is to provide lightning protection for the transmission line as well as to help dissipate fault currents that may be experienced by the components of the power system. The optical fibers placed inside the OPGW cable are typically used for power system protection and telemetry, but have also been used for commercial applications where the capacity of the unused (dark) fibers is sold to telecom operators.

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