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A fiber grating transformer online monitoring system and monitoring method thereof

A fiber grating and monitoring system technology, applied in signal transmission systems, non-electrical signal transmission systems, instruments, etc., to facilitate wavelength division time division multiplexing and distributed sensing, high sensing accuracy and sensitivity, and small size Effect

Active Publication Date: 2016-09-21
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN 101917230B, the patent titled "Large-capacity self-healing optical fiber sensor network" discloses a theoretical pervasive sensor network, but does not provide a solution to the above-mentioned technical problems existing in the prior art

Method used

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  • A fiber grating transformer online monitoring system and monitoring method thereof
  • A fiber grating transformer online monitoring system and monitoring method thereof
  • A fiber grating transformer online monitoring system and monitoring method thereof

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Embodiment Construction

[0057] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0058] The structure diagram of the fiber grating transformer on-line monitoring system provided by the present invention is as follows: figure 1 As shown, the system includes a terminal display computer 1, an intelligent module 2, an optical switch action device 7 and several monitoring units 10, each monitoring unit 10 includes a fiber grating demodulator 3 and several sensing units 9, each transmitting The sensing unit 9 includes a fiber grating sensing string 8, a 1×1 optical switch 5 and a 1×2 fiber optic beam splitter 4. The fiber grating sensing string 8 is used for the top oil temperature of the transformer, the bottom oil temperature, the iron core temperature, and the bus bar. A complete string of fiber grating sensors 6 connected end to end for monitoring of row temperature, winding temperature and vibration, etc. The fi...

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Abstract

The invention relates to an on-line monitoring system and method for a fiber grating transformer. The intelligent modules of the monitoring system are respectively connected to a terminal display computer, an optical switch action device and at least one monitoring unit; each monitoring unit includes a fiber grating solution connected through an optical fiber. A tuner and at least one sensing unit; each sensing unit includes a fiber grating sensing string, a 1×1 optical switch and a 1×2 fiber beam splitter that are sequentially connected to form a closed-loop structure. The monitoring method includes the working status of the normal situation and the working status of the FBG sensing string when the fiber is cut. Function to monitor the status of the FBG sensing string.

Description

technical field [0001] The invention relates to an on-line monitoring technology for power transformers, in particular to an on-line monitoring system for optical fiber grating transformers and a monitoring method thereof. Background technique [0002] The level of mechanical vibration, winding temperature, iron core temperature and oil temperature of the power transformer in the power system is a direct reflection of the insulation and aging rate, which directly affects the safe operation of the power system. Under normal circumstances, the benchmark for the hot spot temperature is 98°C, and the aging rate doubles for every 6°C increase in the benchmark temperature, and the life doubles for every 6°C drop to characterize the relationship between the aging rate and temperature. If the hot spot temperature exceeds the allowable value, it will not only affect the service life of the transformer, but also cause accidents related to the safe operation of the transformer. Theref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D21/02G08C23/06
Inventor 闫志学张睿汭仝杰
Owner STATE GRID CORP OF CHINA
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