Optical fiber Bragg grating temperature sensor for measuring temperature of dry type air-core reactor and application method of optical fiber Bragg grating temperature sensor

Abstract

The invention relates to an optical fiber Bragg grating temperature sensor for measuring temperature of a dry type air-core reactor and an application method of the optical fiber Bragg grating temperature sensor, and belongs to the technical field of photoelectron measurement. The tail part of an optical fiber Bragg grating is connected with an optical fiber; the lead-out optical fiber penetrates out from a polytetrafluoroethylene sleeve and is adhered and fixed by epoxy resin, so as to play a role in protecting the optical fiber; a rectangular gap is formed in the middle of the left end of a polytetrafluoroethylene plate; a transverse round hole is drilled in the gap, and is used for planting the optical fiber Bragg grating; the optical fiber Bragg grating is in a cantilever beam structure in the round hole, fills the rectangular gap by a polytetrafluoroethylene material after being planted, and is integrally encapsulated into a rectangular structure together with the polytetrafluoroethylene plate; the temperature change of the dry type air-core reactor is calculated according to the relational expression delta lambdaB is equal to KT multiplied by deltaT of a displacement value of a center wavelength of the optical fiber Bragg grating and the outer encapsulation temperature of a lead of the reactor. The optical fiber Bragg grating temperature sensor is suitable for temperature detection in a strong electromagnetic field environment, and is high in anti-corrosion capability and very small in size.

Description

technical field [0001] The invention relates to an optical fiber Bragg grating temperature sensor for measuring the temperature of a dry-type air-core reactor and a use method thereof, belonging to the technical field of optoelectronic measurement. Background technique [0002] Dry-type air-core reactor has the advantages of good linearity, low noise, high short-circuit resistance, and easy maintenance. It plays an important role in maintaining power system voltage stability, limiting short-circuit current, and performing reactive power compensation. In recent years, with the increasing application of 35kV parallel dry-type air-core reactors, frequent burning accidents occurred during normal operation, which has brought many problems to the safe and stable operation of the power system. The factors causing the above-mentioned accidents are complex, and the specific reasons have not yet been ascertained. Among them, the high temperature of the dry-type air-core reactor will h...

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Problems solved by technology

[0005] The invention provides an optical fiber Bragg grating temperature sensor for measuring the temperature of a dry-type air-core reactor and a method for using the sensor, which is used to solve the problem of accurate and timely detection of the temperature of the dry-type air-core reactor and to solve the problem of dry-type air-core reactor The structure and installation of the sensor when detecting the temperature of the reactor

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