Power transformer oil temperature monitoring system based on fiber bragg gratings
A power transformer and optical fiber grating technology, which is applied in the field of power transformer oil temperature monitoring system, can solve the problems of easy damage, easy corrosion, strong magnetic field interference, etc., and achieve the effect of sensitive response, accurate measurement, and online detection
Inactive Publication Date: 2020-06-05
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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[0006] This application provides a power transformer oil temperature monitoring system based on optical fiber gratings to solve the current problems of traditional transformer winding temperature monitoring such as easy corrosion, strong magnetic field interference, and easy damage.
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[0026] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0027] The embodiment of the present application provides a fiber grating-based power transformer oil temperature monitoring system. The system uses a fiber grating sensor as a passive device relying on optical signal transmission, and is a non-electrical system that can improve the stable operation of the transformer.
[0028] Such as figur...
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The invention discloses a power transformer oil temperature monitoring system based on fiber bragg gratings. The system comprises a pulse laser, an optical fiber coupler, an optical fiber grating temperature sensing module and a demodulation display device, the output end of the pulse laser is connected with the input end of the optical fiber coupler, and the first output end of the optical fibercoupler is connected with the optical fiber grating temperature sensing module; the demodulation display device comprises a volume phase grating module, an array detector, a controller and a display module. The second output end of the optical fiber coupler is connected with the input end of the volume phase grating module, a plurality of output ends of the volume phase grating module are connected with the input end of the array detector, the output end of the array detector is connected with the input end of the controller, and the output end of the controller is connected with the display module. According to the temperature monitoring system provided by the invention, the characteristics of corrosion resistance, high measurement speed, electromagnetic interference resistance, sensitivereaction and the like of the fiber bragg grating are fully utilized, and accurate measurement of the temperature of the transformer winding is realized.
Description
technical field [0001] The present application relates to the technical field of on-line monitoring of electrical equipment, in particular to a fiber grating-based power transformer oil temperature monitoring system. Background technique [0002] The power transformer is one of the most important electrical equipment in the power system. Its safe and stable operation directly affects the reliability of the power supply and the normal operation of the system. Studies have shown that the decisive factor for transformer safety, economic operation and service life when transformer hot spot temperature rise has become an important manifestation of health hazards and fault development in transformer condition monitoring. Therefore, through the real-time monitoring of the hot spot temperature of the transformer, the load of the transformer can be adjusted in real time according to the change of the hot spot temperature, and the transformer failure caused by overheating can be avoid...
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IPC IPC(8): G01K11/32G01K11/3206
CPCG01K11/32
Inventor 彭庆军钱国超项施叶子陈伟根万福马仪程志万邹德旭王山洪志湖张知先颜冰代维菊
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST