Flow rate online monitoring system of transformer oil

A monitoring system and transformer oil technology, applied in the direction of fluid velocity measurement, velocity/acceleration/shock measurement, instruments, etc., can solve the problems of low accuracy of transformer insulating oil flow velocity, transformer blockage, inconvenience, etc., and achieve a safe and reliable measurement method Convenience, low loss, wide frequency effect

Active Publication Date: 2017-03-08
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
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Problems solved by technology

First of all, the accuracy of this method to measure the flow rate of transformer insulating oil is not high, and because of the use of mechanical methods for testing, it is easy to cause blockage of the transformer and cause adverse effects on the transformer; secondly, this traditional method of measuring transformers can only be used in transformers. It is neither safe nor convenient for the inspection personnel to read at the installed position.

Method used

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  • Flow rate online monitoring system of transformer oil
  • Flow rate online monitoring system of transformer oil
  • Flow rate online monitoring system of transformer oil

Examples

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Embodiment 1

[0025] Such as Figure 2~4 As shown, the transformer oil flow rate online monitoring system of this embodiment includes an illumination system 1, an optical fiber sensor 2, a photoelectric converter 3, a signal processing unit 4, and a computer 5, and an optical fiber sensor is arranged on the six upper convection ports of the three-phase transformer. 2. The illumination system 1 is used to illuminate the optical fiber sensor 2 .

[0026] Each optical fiber sensor of the present embodiment all comprises bracket 21, optical fiber 22, elastic steel sheet 23 and fiber grating 24, and bracket 21 is used for fixing with the entrance of upper convection port, comprises an annular support plate 211, the inner side of annular support plate 211 A cylindrical plug-in 212 is extended, and the outer diameter of the cylindrical plug-in 212 matches the diameter of the upper convection port to ensure that the optical fiber sensor 2 can just be inserted into the upper convection port. The inn...

Embodiment 2

[0057] Such as Figure 7 , Figure 8 As shown, the transformer oil flow rate online monitoring system of this embodiment has the same structure as that of Embodiment 1 in that it includes an illumination system 1, an optical fiber sensor 2, a photoelectric converter 3, a signal processing unit 4 and a computer 5, and this embodiment The structure of the optical fiber sensor 2 is basically the same as that of the embodiment 1, except that the light outlets of the six fiber gratings 24 of this embodiment are sequentially connected in series through an optical fiber 22. In addition, this embodiment also includes an M-Z interferometer 6 and a wave splitter 7 (wavelength division multiplexing), and the M-Z interferometer 6 is used to convert the deviation of the central wavelength of each fiber grating into a corresponding light intensity signal, and pass The wave splitter 7 splits the light, and the wave splitter 7 sends the light of six different central wavelengths to the corre...

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Abstract

The invention relates to a flow rate online monitoring system of transformer oil. The monitoring system is characterized in that: the monitoring comprises a lighting system, a fiber sensor, a photoelectric converter, a signal processor and a computer; the fiber sensor is arranged at an upper convection opening or a lower convection opening of a transformer; the lighting system is used for irradiating the fiber sensor; each fiber sensor comprises a support; each support is used for being fixed to the upper convection opening or the lower convection opening; an elastic steel sheet is vertically fixedly arranged in each support; a fiber bragg grating is fixed on the inner side of each elastic steel sheet; emergent ray of each fiber bragg grating is sent to the photoelectric converter through a fiber; the photoelectric converter sends the received signal subjected to processing of the signal processing unit to the computer; and the computer obtains insulation oil flow rate according to relation between offset of the central wavelength of the fiber bragg grating and the insulation oil convection flow speed. The monitoring system can be widely applied in flow rate monitoring of oil immersed transformers.

Description

technical field [0001] The invention relates to an online transformer oil flow rate monitoring system based on an optical fiber sensor, and relates to the technical field of transformer online monitoring. Background technique [0002] The measurement of automated fluid flow and regulation in industrial production processes is the basis for ensuring safe and economical operation of the production process, reducing material consumption, improving product quality and economic benefits, and scientific management. With the development of science and technology, the accuracy of flow measurement is getting higher and higher, and more and more fluid species need to be detected. Due to the complexity of the fluid composition and physical and chemical properties measured in the transformer industry and various flow states, coupled with the extremely high temperature inside the transformer, a new method is needed to measure and monitor the flow rate and flow of the insulating oil insid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P5/26
CPCG01P5/26
Inventor 王伟余广译高超飞宋树王杨超
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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