Optical fibers with Bragg grating sensors can be used to measure dynamic strains in mechanical systems. The inherent electrical insulating properties of optical fiber measurement systems are of great advantage when working on high voltage systems. In the present work such sensors are employed to detect and measure vibrations on overhead power lines. Vibrations may over time cause fatigue damage, and especially on large fjord crossings mechanical failures may have dramatic consequences. In the present study results obtained from a full-scale tests on a 300 kV overhead power line are presented. Numerical simulations of the same power line have also been done, and comparisons between measurements and simulations are presented.
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