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Proceedings Paper

Verification of the windings axial clamping forces for high voltage power transformers by using passively mode-locked fiber lasers
Author(s): Ionuţ Romeo Şchiopu; Andrei Drăgulinescu; Raluca Iordănescu; Andrei Marinescu
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Paper Abstract

The current paper describes an optoelectronic method for direct monitoring of the axial clamping forces both in static and in dynamic duty. As advantages of this method we can state that it can be applied both to new and refurbished transformers without performing constructive changes or affecting in any way the transformer safety in operation. For monitoring the axial clamping forces for high-voltage (HV) power transformers, we use an optical fiber that we integrate into the laser cavity of a passively mode-locked fiber laser (PMFL). To each axial clamp corresponds a solitonic optical spectrum that is changed at the periodical passing of the fundamental soliton pulse through the sensitive fiber inside the transformer. Moreover, as a specific characteristic, the laser stability is unique for each set of axial clamping forces. Other important advantages of using an optical fiber as compared to the classical approach in which electronic sensors are used consist in the good reliability and insulator properties of the optical fiber, avoiding any risk of fire or damage of the transformer.

Paper Details

Date Published: 20 February 2015
PDF: 9 pages
Proc. SPIE 9258, Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies VII, 92582Q (20 February 2015); doi: 10.1117/12.2072311
Show Author Affiliations
Ionuţ Romeo Şchiopu, Politehnica Univ. of Bucharest (Romania)
Andrei Drăgulinescu, Politehnica Univ. of Bucharest (Romania)
Raluca Iordănescu, National Institute of Research and Development for Optoelectronics (Romania)
Andrei Marinescu, ICMET (Romania)

Published in SPIE Proceedings Vol. 9258:
Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies VII
Ionica Cristea; Marian Vladescu; Razvan Tamas, Editor(s)

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