Temperature measurements in power plant equipment using distributed fiber optic sensing

Author

Boiarski, A.A. ; Pilate, G. ; Fink, T. ; Nilsson, N.

Author_Institution

Batelle Columbus Operations, Columbus, OH, USA

Volume

10

Issue

4

fYear

1995

fDate

10/1/1995 12:00:00 AM

Firstpage

1771

Lastpage

1778

Abstract

A special optical fiber is described which can measure local temperature from 0 to 150°C in electrical power equipment with an accuracy of ±5°C. Changes in Rayleigh backscattered light from the fiber cladding indicates changes in local temperature at points along the fiber using an optical time domain reflectometer approach. This distributed fiber optic temperature sensor (DFOTS) had a spatial resolution of 10 cm using fiber sensors up to 100 m long. Field test data were successfully obtained for several electrical power system applications. Switchgear finger cluster, stator winding, and rotor shaft temperatures were all measured in operating power plants. Results show that the Rayleigh DFOTS approach can provide valuable information about thermal performance of operating electrical equipment

Keywords

fibre optic sensors; optical time-domain reflectometry; power apparatus; power stations; power system measurement; reflectometers; temperature measurement; 0 to 150 C; 100 m; Rayleigh backscattered light; accuracy; distributed fiber optic sensing; fiber cladding; optical time domain reflectometer; power plant equipment; rotor shaft; spatial resolution; stator winding; switchgear finger cluster; temperature measurements; thermal performance; Electric variables measurement; Optical fiber devices; Optical fiber sensors; Optical fiber testing; Optical fibers; Optical sensors; Power generation; Power measurement; Temperature measurement; Temperature sensors;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.473381

Filename

473381