Converter transformer valve side bushing partial discharge detection system and method

A technology of partial discharge detection and commutation, which is applied in the direction of testing dielectric strength, etc.

Pending Publication Date: 2022-04-12
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the invention provides a converter valve side bushing partial discharge detection system and method, which solves the problems existing in the existing converter station bushing partial discharge detection, and based on the traditional infrared Disadvantages of thermal image detection

Method used

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  • Converter transformer valve side bushing partial discharge detection system and method
  • Converter transformer valve side bushing partial discharge detection system and method
  • Converter transformer valve side bushing partial discharge detection system and method

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Embodiment 1

[0051] Such as figure 1 As shown, the present invention provides a partial discharge detection system for converting the valve side casing, including an image acquisition module, an image processor, and a terminal host computer;

[0052] The image acquisition module is used in a multi-angle acquisition of the thermal image map and performs real-time storage;

[0053] The image processor is configured to gray linear transformation of the multi-angle thermal image map and the median filtering process, expand the contrast, reduce environmental noise, and improve imaging quality.

[0054] The terminal upper machine is configured to fuse the multi-angle thermal image diagram of the image processor to form a full-scale sleeve surface temperature thermostat; based on the full-scale sleeve surface temperature hot pattern, calibration camera parameters And perform dimensional transformation, construct a three-dimensional cannula temperature model with the surface temperature information of...

Embodiment 2

[0059] Such as image 3 As shown, the present invention provides the present invention also provides a partial discharge detection method for converting a variable valve side casing, which is as follows:

[0060] S1, a 5 infrared thermal imagery surrounding the sleeve is equipped, and the infrared thermal imager is located in the same horizontal plane and does not contact with the sleeve, the horizontal plane and the sleeve are axially perpendicular;

[0061] In this embodiment, 5 infrared thermal images are arranged around the sleeve axial orientation, and all infrared thermographs and sleeves measure the terminals at the same horizontal position and maintain a certain distance, and the plane is axially perpendicular to the casing. Real-time collection on the surface temperature of the running firing valve side sleeve.

[0062] S2, using the 5 infrared thermal imager multi-angle to collect the thermal image map, and use the data storage card to perform real-time storage;

[0063] ...

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Abstract

The invention provides a converter transformer valve side bushing partial discharge detection system and method, and belongs to the technical field of power setting on-line detection, the system comprises an image acquisition module, an image processor and a terminal host computer; the image acquisition module is used for acquiring thermal images at multiple angles and storing the thermal images in real time; the image processor is used for carrying out gray linear transformation and median filtering processing on the multi-angle thermogram; the terminal upper computer is used for splicing and fusing the multi-angle thermograms processed by the image processor to form an omnibearing thermogram; calibrating camera parameters and performing dimension transformation based on the omnibearing thermogram, and constructing a three-dimensional sleeve temperature model with sleeve surface temperature information; and marking an abnormal temperature rise area according to the three-dimensional casing pipe temperature model, and carrying out heat source positioning. According to the invention, the heating source in the bushing, namely the position and the type of partial discharge, can be judged more quickly and accurately.

Description

Technical field [0001] The present invention belongs to the field of power disposal online detection technology, and more particularly to a partial discharge detection system and method for converting a variable valve side casing. Background technique [0002] The converter station is an important part of the DC transmission system, and the current is converted to DC in the converter station. The converter station cannula acts as a converter station to enter and exit, and functions as insulation and mechanical support. Since its manufacturing process and complex working conditions, the spatial charge internally accumulated during the operation of the converter station can affect the internal electric field distribution of the sleeve. As the operating voltage level and time is improved, it is easy to in the middle flange. Flashring, corona, causing damage to the sleeve insulation system. Therefore, it is important to strengthen the inspection of the insulation of the sleeve to imp...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCY02E60/60
Inventor 刘凯程华润林牧高波高国强吴广宁
Owner SOUTHWEST JIAOTONG UNIV
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