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12 October 2007 Combined distributed temperature sensing and current monitoring
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Proceedings Volume 6770, Fiber Optic Sensors and Applications V; 677015 (2007)
Event: Optics East, 2007, Boston, MA, United States
Power cables should be operated at an adequate temperature level. Therefore, numerous power utilities have installed optical distributed temperature sensing (DTS) systems to measure the temperature of underground cables. Protection and metering systems used in power systems require measurements of the current flowing in the high-power conductors as well. Optical current sensors achieve increasing attention and acceptance for this application due to their inherent electrical insulation, high bandwidth, and immunity to EMI. DTS systems are based on spontaneous Raman scattering or Brillouin scattering, which use spectral information in the reflected light, whereas optical current sensors are based on the Faraday effect, which changes the intensity of transmitted light. This paper proposes a novel design of a combined optical temperature and current measurement system, using both physical effects. A first measurement setup is described, and first results are discussed. Thereby, the specifications for the combined data acquisition and data processing unit are analyzed in order to optimize the accuracy and the reliability of each subsystem and the whole system.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sebastian G. M. Krämer, Wilhelm Feichter, Fernando Puente León, and Jörg Stromberger "Combined distributed temperature sensing and current monitoring", Proc. SPIE 6770, Fiber Optic Sensors and Applications V, 677015 (12 October 2007);

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