Corona detection method and device for generator stator end winding
A technology of generator stator and end winding, which is applied in the direction of measuring device, measuring electricity, measuring electrical variables, etc., can solve the problems of low detection efficiency, interference of human factors, etc., and achieve the effect of eliminating the shooting distance
Active Publication Date: 2019-03-29
NORTH CHINA ELECTRICAL POWER RES INST +1
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Problems solved by technology
[0007] In view of this, the technical problem to be solved by the present invention is to provide a corona detection method for the end winding of the generator stator, which solves the problem that in the prior art, the detection of the corona of the stator winding of the generator is easily interfered by human factors, and the detection efficiency is low. The problem
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[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the spirit of the disclosure of the present invention will be clearly described below with the accompanying drawings and detailed descriptions. Any person skilled in the art will understand the embodiments of the present invention. , when it can be changed and modified by the technology taught in the content of the present invention, it does not depart from the spirit and scope of the content of the present invention.
[0023] The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention. In addition, elements / members with the same or similar numbers used in the drawings and embodiments are used to represent the same or similar parts.
[0024] As used herein, "first", "second", ... etc. do not refer to a particular sequence or order, nor are they used to limit the pre...
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The invention provides a generator stator end winding corona detection method and device. The generator stator end winding corona detection method comprises obtaining the corona discharge image of a generator stator bar end portion under a relatively-dark environment; obtaining the natural illumination image of the generator stator bar end portion under the normal illumination environment, wherein the natural illumination image and the corona discharge image are taken by the same shooting equipment, when the natural illumination image and the corona discharge image are taken, the shooting position, the shooting angle, the focal distance and the aperture of the shooting equipment remain unchanged; and superposing the corona discharge image and the natural illumination image to obtain a corona positioning image. According to the invention, the demand on the surrounding illumination environment during the test process is reduced, the test efficiency is improved, interference of human factors on the test result is avoided, and therefore the corona discharge area can be positioned accurately.
Description
technical field [0001] The invention relates to the field of turbogenerators, in particular to a corona detection method for a generator stator end winding, specifically a corona detection method and device for a generator stator end winding. Background technique [0002] As we all know, corona discharge is a kind of self-sustaining glow discharge produced by ionization of air in an extremely uneven electric field. In an extremely uneven electric field, the maximum field strength is much higher than the average field strength, so that when the applied voltage is still low, air ionization has already occurred in the local maximum field strength area, and a large amount of light radiation is emitted, making the area in the dark A thin luminescent layer appears in the nearby space, generally manifested as a blue halo, which is the corona. [0003] The distribution of the electric field is extremely uneven in the vicinity of the outlet slot of the stator bar of the turbogenerat...
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IPC IPC(8): G01R31/12
CPCG01R31/1227
Inventor 张杰雷雨王劲松孙士涛龙飞岳东旭
Owner NORTH CHINA ELECTRICAL POWER RES INST