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Method for monitoring top-layer oil temperature of oil-immersed power transformer based on optical fiber Bragg grating

A power transformer, top oil temperature technology, applied in the direction of physical/chemical changes in thermometers, thermometers, instruments, etc., can solve the threats to the safe operation of oil-immersed power transformers, reduce the operating life of oil-immersed power transformers, etc. Strong anti-electromagnetic interference ability, simple structure and small volume

Inactive Publication Date: 2012-07-18
KUNMING UNIV OF SCI & TECH +1
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Problems solved by technology

The insulation and aging rate of oil-immersed power transformers are related to the temperature of oil-immersed power transformer oil. Exceeding the allowable limit of temperature will not only reduce the operating life of oil-immersed power transformers, but also affect the safety of oil-immersed power transformers. run a threat

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  • Method for monitoring top-layer oil temperature of oil-immersed power transformer based on optical fiber Bragg grating
  • Method for monitoring top-layer oil temperature of oil-immersed power transformer based on optical fiber Bragg grating
  • Method for monitoring top-layer oil temperature of oil-immersed power transformer based on optical fiber Bragg grating

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing and embodiment, the present invention will be further described:

[0028] Such as figure 1 As shown: First, insert a fiber Bragg grating temperature sensor connected to the spectrum analyzer into the top layer of oil through the oil-immersed electric test hole; after stabilization, analyze the wavelength value reflected by the fiber Bragg grating according to the spectrum analyzer Then, through the relationship between the shift of the wavelength of the fiber Bragg grating temperature sensor and the temperature change, the temperature of the oil on the top layer of the oil-immersed power transformer is calculated; finally, the measured temperature is compared with the temperature rise standard of the oil-immersed power transformer, It can be judged whether the oil-immersed power transformer is in normal working condition.

[0029] It is advisable that the optical fiber Bragg grating temperature sensor is inserted into the ...

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Abstract

The invention relates to a method for monitoring the top-layer oil temperature of an oil-immersed power transformer based on optical fiber Bragg grating, belonging to the technical field of electronic measurement. The method comprises the following steps of: firstly inserting an optical fiber Bragg grating temperature sensor connected with an optical spectrum analyzer into top-layer oil from an oil-immersed power transformer test hole; after the optical fiber Bragg grating temperature sensor is stable, analyzing the variation of a wavelength value reflected by an optical fiber Bragg grating by adopting the optical spectrum analyzer; then, according to the variation relationship between the displacement and the temperature of the optical fiber Bragg grating temperature sensor, calculating the temperature of the top-layer oil of the oil-immersed power transformer; and finally comparing the measured temperature with the temperature rise standard of the oil-immersed power transformer to judge whether the oil-immersed power transformer is under the normal working condition. According to the method, the optical fiber Bragg grating sensor is adopted to be inserted into the top-layer oil of the oil-immersed power transformer for a long term, so as to detect the temperature of the top-layer oil of the transformer in real time. The optical fiber Bragg grating sensor has a simple structure and is convenient to operate.

Description

technical field [0001] The invention relates to a method for monitoring oil temperature at the top layer of an oil-immersed power transformer based on an optical fiber Bragg grating, belonging to the technical field of optoelectronic measurement. Background technique [0002] The oil-immersed power transformer is one of the core equipment for the operation of the power system, and the oil temperature of the oil-immersed power transformer is directly related to the service life of the oil-immersed power transformer and the operation safety of the power transmission and transformation system. Therefore, it is necessary for each transformer to The power station monitors the oil temperature of the oil-immersed power transformer. The insulation and aging rate of oil-immersed power transformers are related to the temperature of oil-immersed power transformer oil. Exceeding the allowable limit of temperature will not only reduce the operating life of oil-immersed power transformers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32G01K11/3206
Inventor 李川李国民王达达张少泉李建发孙家禄
Owner KUNMING UNIV OF SCI & TECH
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