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A method for installing the sensing optical fiber of the stator core of the hydroelectric generator

A hydro-generator and sensing optical fiber technology, which is applied to electromechanical devices, manufacturing stator/rotor bodies, electrical components, etc., can solve the problems of difficult installation of optical fiber sensors, and achieve the effect of improving system fault location accuracy and sensitivity.

Active Publication Date: 2018-01-19
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, affected by the iron core structure of the stator core of the large hydroelectric generator and the maintenance and assembly process of the iron core, it is difficult to install the optical fiber sensor

Method used

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  • A method for installing the sensing optical fiber of the stator core of the hydroelectric generator
  • A method for installing the sensing optical fiber of the stator core of the hydroelectric generator
  • A method for installing the sensing optical fiber of the stator core of the hydroelectric generator

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0022] In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0023] The present invention is aimed at the installation of the optical fiber sensor and the optical fiber bending attenuation amplifier of the stator core displacement online monitoring system during the operation of the hydraulic generator. There is no research on the online monitoring technology of the large hydraulic turbine stator core by using the optical fiber sensing technology ...

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Abstract

The invention relates to the technical field of installation of sensing optical fibers, in particular to a method for installing sensing optical fibers in stator iron cores of hydraulic generators, so as to install the sensing optical fibers on the stator iron cores. The installation method includes: the process of arranging the sensing optical fiber around the inside of the tooth groove of the stator core; the process of fixing the sensing optical fiber with an adhesive; amplifier process. In the present invention, the sensing optical fiber is arranged in the groove of the stator iron core, and the optical power change of the sensing optical fiber is used to indirectly reflect the operation state of the stator iron core. The attenuation amplifier improves the sensitivity of the sensing fiber and the accuracy of system fault location.

Description

technical field [0001] The invention relates to the technical field of installation of sensing optical fibers, in particular to a method for installing sensing optical fibers in stator iron cores of hydraulic generators, so as to install the sensing optical fibers on the stator iron cores. Background technique [0002] During the operation of the hydroelectric generator in a hydropower plant, the silicon steel sheet in the stator groove is broken. Under the pulling force of the generator magnetic field, the broken silicon steel sheet cuts through the insulation layer of the stator coil, and the generator stator is grounded and forced to stop. occur, resulting in huge economic losses. In order to realize the on-line monitoring of the stator core of the generator, and avoid the influence of the sensing element by the strong magnetic field and high electric field environment of the generator, a highly bend-sensitive optical fiber is used as the sensing element, and the large-sc...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K15/02H02K11/22
Inventor 付廷勤李永清王恩选别必鹏沈利平姬发茂刁国峰曾需要李晓崔新友
Owner STATE GRID CORP OF CHINA