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Fiber bragg grating (FBG) sensor based transformer fault gas monitoring system

A technology of transformer faults and fiber gratings, which is applied in the direction of instruments, measuring electronics, and measuring devices, can solve the problems of carrier gas or chromatographic column consumables, gas selectivity, and low monitoring sensitivity, so as to solve the problems of slow oil-gas separation balance, Good for long-term monitoring and high-resolution effects

Active Publication Date: 2013-03-20
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0006] In view of the shortcomings of the existing online monitoring system in the above technical background, which can only be used for early warning, gas selectivity and monitoring sensitivity are not high, carrier gas or chromatographic column consumables are required, the present invention proposes a sensor transformer based on fiber Bragg grating Fault Gas Monitoring System

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  • Fiber bragg grating (FBG) sensor based transformer fault gas monitoring system
  • Fiber bragg grating (FBG) sensor based transformer fault gas monitoring system

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Embodiment Construction

[0018] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0019] 1. Metal coating on the surface of fiber Bragg grating

[0020] figure 1 In the above, since the types of metals that can be attached to the surface of the Fiber Bragg Grating are limited, a very thin layer of metal that can be attached to the surface of the Fiber Bragg Grating is first coated, and the metal is used to wrap the grating section. In this example, metal gold is used . figure 2 The middle FBG is a Fiber Bragg Grating (Fiber Bragg Grating); λ is the returned central wavelength spectrum.

[0021] 2. Sensor Metal Deposition

[0022] Deposit a layer of second metal with a certain thickness, such as lanthanum pentanickelide (LaNi5), which is sensitive to special gases, on the gate section covered by...

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Abstract

The invention discloses a fiber bragg grating (FBG) sensor based transformer fault gas monitoring system in the technical field of on-line monitoring system. The system comprises a gas sensor array, FGG demodulation equipment, a transformer fault monitoring center and the like. In the system, an FBG sensor is adopted, and the FBG sensor has strong anti-electromagnetic interference and is beneficial to application to environment with extremely severe electromagnetic environment; the sensor has high sensitivity and high resolution and can be used for simultaneously detecting all parts of the transformer on line, thereby the system maintenance cost is greatly reduced; and the system solves a series of problems of cross sensitivity among gases, slow oil-gas separation and balancing, short breathable film service life, and the like in the traditional fault monitoring method.

Description

technical field [0001] The invention belongs to the technical field of an online monitoring system, in particular to a transformer fault gas monitoring system based on a fiber Bragg grating sensor. Background technique [0002] As the key equipment in the operation of the power grid, the reliability of the power transformer is particularly important in the operation of the power grid. [0003] By monitoring and analyzing the gas dissolved in the oil, latent faults inside the transformer can be discovered as early as possible, and the development and changes of the faults can be grasped at any time. However, the traditional monitoring method needs to go through the steps of sampling, oil and gas separation, component monitoring, and data processing for each monitoring. The process of oil and gas separation is greatly affected by human beings, and the monitoring results are inaccurate. This monitoring technology belongs to an off-line monitoring method. The whole monitoring p...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/00G01N1/28G01R31/00
Inventor 马国明李成榕罗颖婷
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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