LIOS Technology - Case studies "Power"

LIOS Technology - Distributed Temperature Sensing

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Case studies "Power"

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		The necessity analysis of distributed fibre optic temperature monitoring by Xiamen power cable alarm case study This paper introduces the application results of Distributed Fibre Optic Temperature Monitoring (DTS) used in Xiamen Power utility for 220 kV power cable operation monitoring at a cross bonding box earthing problem caused by water leakage in a cable joint manhole.

		Real-Time Cable Thermal Rating (RTTR) went on-line at a tunnel near Stockholm, Sweden In October 2006 the commissioning of the integrated condition monitoring system (CMS) for real-time monitoring of cables was successfully completed. Together with a Distributed Temperature Sensor (DTS) a parallel run of cables installed in a tunnel near Stockholm (Sweden) is being continuously rated by RTTR.

		Burbo Offshore Windfarm - Distributed Temperature Monitoring of Long Distance Submarine Cables Distributed temperature sensing (DTS) of long distance power cables is shown to provide valuable information for cable design optimisation and proper operation of wind farms. The long range sensing is enabled by using the Raman-OFDR (optical frequency domain reflectometry) technology in single-mode fibres. Raman-OFDR uses a modulated continuous wave laser for detection. The low peak power minimizes stimulated Raman-scattering in single-mode fibres making accurate temperature sensing over long distances feasible.

		Graz: Reliable Energy Supply for Graz, Austria The new cable installation is one of the city’s main transmission lines and is heavily loaded. In order to optimize the transmission performance and to guarantee its secure reliability, the cable installation has been equipped with large scale cross-bonding systems at its sheath. In addition, by the help of the LIOS temperature monitoring system (DTS), the level of backup capacity can be assessed.

		Beijing: Long Distance Cable Temperature Monitoring System for the Olympic City 2008 Beijing This project was the premiere of a successful cooperation between Brugg Cables and LIOS Technology. Both partners are currently developing further projects for power cable monitoring even with integrated dynamic rating systems (RTTR).

		Cable Monitoring of 220kV system in Hangzhou, China Distributed Power Cable Monitoring of a 220kV XLPE cable circuit in Hangzhou, China. The LIOS DTS is linked to an external fibre optic sensor cable which runs along the entire system length.

		Sao Paulo Villa Formosa, Eletropaulo, Sao Paulo / Brazil Real time determination of thermal conditions along power cable systems and phase-wires on overhead lines. Distributed temperature sensing (DTS) is a powerful tool that allows to accurately rate cables and transmission lines based on actual field conditions. It is especially valuable for dynamic current rating and the essential success factor of Smart Grid implementations.

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