Oil immersed power transformer top layer oil temperature monitoring method based on fiber Bragg grating

Abstract

The invention relates to an oil immersed power transformer top layer oil temperature monitoring method based on fiber Bragg grating and belongs to the technical field of photoelectronic measurement. The method comprises the following steps of: firstly, inserting a fiber Bragg grating temperature sensor connected with a spectrum analyzer into top layer oil through an oil immersed power transformer test hole; after stabilization, analyzing the change of wavelength values of the fiber Bragg rating reflection according to the spectrum analyzer, and then calculating the temperature of the top layer oil of the oil immersed power transformer through the relation between the shift of the fiber Bragg grating temperature sensor and the change of temperature; and finally, comparing the measured temperature and the temperature rise standard of the oil immersed power transformer, thereby determining whether the oil immersed power transformer is in normal work condition. The oil immersed power transformer top layer oil temperature monitoring method provided by the invention has the beneficial effect that by adopting the fiber Bragg grating sensor which can be inserted into the top layer oil of the oil immersed power transformer, the temperature of the top layer oil of the oil immersed power transformer is detected in real time; and the structure is simple and the operation is convenient.

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...

AI Technical Summary

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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