CN115456931A - High-voltage ceramic bushing state analytic system - Google Patents
High-voltage ceramic bushing state analytic system Download PDFInfo
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 238000004140 cleaning Methods 0.000 claims abstract description 13
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- 239000012459 cleaning agent Substances 0.000 claims abstract description 5
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 4
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Abstract
The invention relates to a high-voltage ceramic bushing state analytic system, comprising: the transformer main structure comprises a micro camera shooting mechanism, an embedded processor, a moisture absorber, a safety air channel, a gas relay, an oil conservator, a temperature measuring mechanism, an iron core, a winding, a cooling mechanism, a pressure regulating mechanism and a high-voltage ceramic sleeve; the information extraction equipment is used for acquiring each gray value of each pixel point of the received reference region and outputting the gray value with the largest occurrence frequency as a reference gray value; and the dosage conversion equipment is used for determining the dosage of the cleaning agent required by the high-voltage ceramic bushing based on the difference value of the reference gray value and the preset gray limit value when the reference gray value is larger than or equal to the preset gray limit value. The high-voltage ceramic bushing state analysis system is effective in monitoring and wide in application. Due to the adoption of an intelligent differentiation sharpening mechanism and a targeted gray scale separation mechanism, the cleaning dosage required by the high-voltage ceramic bushing in a pollution state is analyzed on site.
Description
Technical Field
The invention relates to the field of transformer monitoring, in particular to a high-voltage ceramic bushing state analysis system.
Background
The high-voltage bushing is mainly used for insulating the inlet and outlet wires of power equipment such as a transformer, an electric reactor and a breaker from the ground, and for the high-voltage circuit to pass through a wall and the like. The high-voltage bushing comprises a single medium bushing, a composite medium bushing and a capacitance bushing. The main insulation of the condenser bushing is composed of a coaxial cylindrical series capacitor group formed by winding a layered insulating material and a foil-shaped metal electrode on a conductive rod. The insulation material is divided into gummed paper and oiled paper condenser bushings.
The main insulation is subject to high voltage during high voltage bushing operation, and the conductive part is subject to large current. The main faults of the device are poor connection of internal and external electrical connectors, damp and deteriorated sleeve insulation, oil shortage of the sleeve, partial discharge of a capacitor core, end screen to ground discharge and the like.
As one of the important parts of a transformer, the degree of contamination of the high-voltage bushing directly determines the operational performance of the transformer, in particular the high-voltage ceramic bushing. However, most of the working environments of the transformers are outdoors or even outdoors, and the operating sites thereof lack a targeted pollution detection mechanism and a cleaning dose analysis mechanism, so that managers of a power supply department cannot know the actual pollution degree and the required different cleaning strategies of each transformer in each transformation site.
Disclosure of Invention
Compared with the prior art, the invention at least has the following prominent substantive characteristics:
(1) According to different importance degrees and complexity degrees of the hue component value, the brightness component value and the saturation component value in the HSB space, different data sharpening strategies are selected so as to reduce the calculation amount of image processing while ensuring the sharpening effect;
(2) And a targeted processing link comprising a signal decomposition device, a direction sharpening device, a superposition execution device, an area analysis device, an information extraction device and a dosage conversion device is introduced, the visual content of the current nearest high-voltage ceramic bushing is extracted, and the specific dosage of the cleaning agent required for cleaning the polluted high-voltage ceramic bushing is judged based on a gray value analysis mode.
According to an aspect of the present invention, there is provided a high voltage ceramic bushing state resolving system, the system comprising:
the transformer main structure comprises a micro camera shooting mechanism, an embedded processor, a moisture absorber, a safety air channel, a gas relay, an oil conservator, a temperature measuring mechanism, an iron core, a winding, a cooling mechanism, a pressure regulating mechanism and a high-voltage ceramic sleeve;
the temperature measuring mechanism is arranged in the oil conservator and used for measuring the internal temperature of the oil conservator;
the cooling mechanism is connected with the temperature measuring mechanism and used for receiving the internal temperature of the oil conservator and executing cooling operation on the internal environment of the oil conservator when the internal temperature of the oil conservator exceeds a preset temperature threshold value.
More specifically, in the high-voltage ceramic bushing state resolving system:
the embedded processor is respectively connected with the cooling mechanism, the temperature measuring mechanism, the pressure regulating mechanism and the miniature camera shooting mechanism.
More specifically, in the high-voltage ceramic bushing state resolving system:
the miniature camera shooting mechanism is arranged opposite to the high-voltage ceramic bushing and used for executing instant camera shooting operation on the working environment of the high-voltage ceramic bushing so as to obtain a corresponding instant acquisition frame.
More specifically, in the high-voltage ceramic bushing state analysis system, the system further includes:
the signal decomposition equipment is connected with the miniature camera shooting mechanism and is used for performing the disassembling processing of the color component value, the brightness component value and the saturation component value in the HSB space on the received instant acquisition frame so as to obtain a first component picture, a second component picture and a third component picture corresponding to the instant acquisition frame;
a component image decomposition mechanism, connected to the signal decomposition mechanism, for performing a high-pass filtering process on the received first component image to obtain a first sharpened image, performing a spatial differentiation mode image data sharpening process on the received second component image to obtain a second sharpened image, and performing an edge sharpening process on the received third component image to obtain a third sharpened image;
the superposition execution device is connected with the component sharpening device and is used for carrying out pixel-by-pixel superposition on the first sharpened picture, the second sharpened picture and the third sharpened picture so as to obtain a targeted sharpened picture corresponding to the instant acquisition frame;
the area analysis device is connected with the superposition execution device and used for analyzing an image area with the largest area in each image area with the appearance characteristics of the high-voltage ceramic bushing from the targeted sharpening picture by using the appearance characteristics of the high-voltage ceramic bushing so as to output the image area as a reference area;
the information extraction equipment is connected with the region analysis equipment and is used for acquiring each gray value of each pixel point of the reference region and outputting the gray value with the largest occurrence frequency as a reference gray value;
the dosage conversion equipment is connected with the information extraction equipment and used for sending a cleaning request command when the received reference gray value is greater than or equal to a preset gray limit value, and meanwhile, determining the reference dosage of the cleaning agent for cleaning the high-voltage ceramic bushing based on the difference value between the reference gray value and the preset gray limit value;
performing a decomposition process of a hue component value, a brightness component value and a saturation component value in an HSB space on a received instant acquisition frame to obtain a first component picture, a second component picture and a third component picture corresponding to the instant acquisition frame includes: acquiring hue component values, brightness component values and saturation component values of each pixel point of a received instant acquisition frame in an HSB space, and combining the hue component values of each pixel point of the instant acquisition frame into a first component picture corresponding to the instant acquisition frame;
the method for obtaining the first component picture, the second component picture and the third component picture corresponding to the instant acquisition frame by performing the decomposition processing of the hue component value, the brightness component value and the saturation component value in the HSB space on the received instant acquisition frame further comprises the following steps: and combining the brightness component values of all the pixel points of the instant acquisition frame into a second component picture corresponding to the instant acquisition frame, and combining the saturation component values of all the pixel points of the instant acquisition frame into a third component picture corresponding to the instant acquisition frame.
The high-voltage ceramic bushing state analysis system is effective in monitoring and wide in application. Due to the adoption of an intelligent differentiation sharpening mechanism and a targeted gray scale separation mechanism, the cleaning dosage required by the high-voltage ceramic bushing in a pollution state is analyzed on site.
Drawings
Embodiments of the invention will now be described with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural view of a high-voltage ceramic bushing state resolving system according to an embodiment of the present invention.
Detailed Description
An embodiment of the high voltage ceramic bushing state analysis system of the present invention will be described in detail with reference to the accompanying drawings.
Generally, in the application scenario of a transformer, high voltage bushings can be divided into oil-filled bushings and condenser bushings.
The cable paper in the oil-filled bushing is similar to the voltage-sharing plate in the condenser bushing. The capacitor core in the capacitor bushing is a string of coaxial cylindrical capacitors, and in the oil-filled bushing, the dielectric constant of the insulating paper is higher than that of oil, so that the field strength at the place can be reduced. The oil-filled bushing can be divided into a single oil gap bushing and a multi-oil gap bushing, and the capacitive bushing can be divided into a gummed paper bushing and an oil paper bushing. Bushings are used when the current carrying conductor needs to pass through a metal enclosure or wall that is at a different potential than the current carrying conductor. According to the application, the bushing can be divided into a transformer bushing, a switch or a bushing for a combined electrical appliance and a wall bushing. For such a "plug-in" electrode arrangement, the electric field at the edge of the outer electrode (e.g. the middle flange of the sleeve) is very concentrated, from where the discharge often starts.
As one of the important parts of a transformer, the degree of contamination of the high voltage bushing directly determines the operational performance of the transformer, in particular the high voltage ceramic bushing. However, most of the working environments of the transformers are outdoors or even outdoors, and the operating sites of the transformers lack a targeted pollution detection mechanism and a cleaning dose analysis mechanism, so that managers of a power supply department cannot know the actual pollution degree and the required different cleaning strategies of each transformer in each transformation site.
In order to overcome the defects, the invention builds a high-voltage ceramic bushing state analysis system, and can effectively solve the corresponding technical problem.
The high-voltage ceramic bushing state analysis system according to the embodiment of the invention comprises:
the transformer main structure comprises a micro camera shooting mechanism, an embedded processor, a moisture absorber, a safety air channel, a gas relay, an oil conservator, a temperature measuring mechanism, an iron core, a winding, a cooling mechanism, a pressure regulating mechanism and a high-voltage ceramic bushing, wherein the structure of the high-voltage ceramic bushing is shown in figure 1;
the temperature measuring mechanism is arranged in the oil conservator and used for measuring the internal temperature of the oil conservator;
the cooling mechanism is connected with the temperature measuring mechanism and used for receiving the internal temperature of the oil conservator and executing cooling operation on the internal environment of the oil conservator when the internal temperature of the oil conservator exceeds a preset temperature threshold value.
Next, a specific configuration of the high-voltage ceramic bushing state analyzing system according to the present invention will be further described.
In the high-voltage ceramic bushing state analysis system:
the embedded processor is respectively connected with the cooling mechanism, the temperature measuring mechanism, the pressure regulating mechanism and the miniature camera shooting mechanism.
In the high-voltage ceramic bushing state analysis system:
the miniature camera shooting mechanism is arranged opposite to the high-voltage ceramic bushing and used for executing instant camera shooting operation on the working environment of the high-voltage ceramic bushing so as to obtain a corresponding instant acquisition frame.
In the high-voltage ceramic bushing state analytic system, the system further comprises:
the signal decomposition equipment is connected with the miniature camera shooting mechanism and is used for performing the disassembling processing of the hue component value, the brightness component value and the saturation component value under the HSB space on the received instant acquisition frame so as to obtain a first component picture, a second component picture and a third component picture corresponding to the instant acquisition frame;
a component image decomposition mechanism, connected to the signal decomposition mechanism, for performing a high-pass filtering process on the received first component image to obtain a first sharpened image, performing a spatial differentiation mode image data sharpening process on the received second component image to obtain a second sharpened image, and performing an edge sharpening process on the received third component image to obtain a third sharpened image;
the superposition execution device is connected with the component sharpening device and is used for carrying out pixel-by-pixel superposition on the first sharpened picture, the second sharpened picture and the third sharpened picture so as to obtain a targeted sharpened picture corresponding to the instant acquisition frame;
the area analysis device is connected with the superposition execution device and used for analyzing an image area with the largest area in each image area with the appearance characteristics of the high-voltage ceramic bushing from the targeted sharpening picture by using the appearance characteristics of the high-voltage ceramic bushing so as to output the image area as a reference area;
the information extraction equipment is connected with the area analysis equipment and is used for acquiring each gray value of each pixel point of the reference area and outputting the gray value with the largest occurrence frequency as a reference gray value;
the dosage conversion equipment is connected with the information extraction equipment and used for sending a cleaning request command when the received reference gray value is greater than or equal to a preset gray limit value, and determining the reference dosage of the cleaning agent for cleaning the high-pressure ceramic bushing based on the difference value between the reference gray value and the preset gray limit value;
performing a decomposition process of a hue component value, a brightness component value and a saturation component value in an HSB space on a received instant acquisition frame to obtain a first component picture, a second component picture and a third component picture corresponding to the instant acquisition frame includes: acquiring hue component values, brightness component values and saturation component values of each pixel point of a received instant acquisition frame in an HSB space, and combining the hue component values of each pixel point of the instant acquisition frame into a first component picture corresponding to the instant acquisition frame;
the method for obtaining the first component picture, the second component picture and the third component picture corresponding to the instant acquisition frame by performing the decomposition processing of the hue component value, the brightness component value and the saturation component value in the HSB space on the received instant acquisition frame further comprises the following steps: and combining the brightness component values of all the pixel points of the instant acquisition frame into a second component picture corresponding to the instant acquisition frame, and combining the saturation component values of all the pixel points of the instant acquisition frame into a third component picture corresponding to the instant acquisition frame.
In the high-voltage ceramic bushing state analysis system:
the command trigger device is further used for sending a cleaning-free command when the received reference gray value is smaller than the preset gray limit value.
In the high-voltage ceramic bushing state analytic system:
performing a decomposition process of the hue component value, the brightness component value and the saturation component value in the HSB space on the received instant acquisition frame to obtain a first component picture, a second component picture and a third component picture corresponding to the instant acquisition frame, further comprising: the received instant acquisition frame, the first component picture, the second component picture and the third component picture have equal resolution.
In the high-voltage ceramic bushing state analytic system, the system further comprises:
and the time-sharing configuration interface is respectively connected with the signal decomposition device, the direction sharpening device, the superposition execution device, the region analysis device, the information extraction device and the dosage conversion device.
In the high-voltage ceramic bushing state analysis system:
the time-sharing configuration interface is used for completing sequential configuration of the operating parameters of the signal decomposition device, the direction dividing sharpening device, the superposition execution device, the region analysis device, the information extraction device and the dose conversion device in a time-sharing manner according to different configuration addresses by adopting a parallel communication line.
In the high-voltage ceramic bushing state analytic system, the system further comprises:
the clock generating mechanism is respectively connected with the signal decomposition device, the direction dividing sharpening device, the superposition execution device, the area analysis device, the information extraction device and the dosage conversion device;
the clock generation mechanism is used for respectively providing required working time sequences for the signal decomposition device, the branch sharpening device, the superposition execution device, the area analysis device, the information extraction device and the dosage conversion device.
In the high-voltage ceramic bushing state analysis system:
the embedded processor is used for respectively configuring the respective operating parameters of the cooling mechanism, the pressure regulating mechanism and the miniature camera shooting mechanism.
In addition, in the use scenario of the transformer, as one of important components, the high voltage bushing is a device for passing one or more conductors through a partition such as a wall or a box, and plays a role in insulation and support, and is an important device in the power system. During the manufacturing, transportation and maintenance processes of the high-voltage bushing, latent defects may remain due to various reasons; during long-term operation, defects are also gradually generated under the influence of the action of electric fields and conductor heating, mechanical damage and chemical corrosion, and atmospheric conditions.
High voltage bushings provide insulation and support for high voltage conductors as they pass through barriers having a different potential than the high voltage conductors, such as walls and power equipment metal housings. Because the electric field distribution in the sleeve is uneven, particularly, the electric field at the edge of the middle flange is very concentrated, so that the surface sliding and flashing discharge is easy to cause. The insulating structure inside the bushing with higher voltage level is more complex, and often adopts combined insulating materials, and has the problems of partial discharge and the like. Therefore, the test inspection of the casing must be enhanced.
The invention has been described in considerable detail, so that various alterations and modifications will become apparent to others skilled in the art upon the reading and understanding of this specification. All such changes and modifications are intended to be included herein within the scope of the present invention and protected by the following claims.
Claims (10)
1. A high voltage ceramic bushing condition resolution system, the system comprising:
the transformer main structure comprises a micro camera shooting mechanism, an embedded processor, a moisture absorber, a safety air channel, a gas relay, an oil conservator, a temperature measuring mechanism, an iron core, a winding, a cooling mechanism, a pressure regulating mechanism and a high-voltage ceramic sleeve;
the temperature measuring mechanism is arranged in the oil conservator and is used for measuring the internal temperature of the oil conservator;
the cooling mechanism is connected with the temperature measuring mechanism and used for receiving the internal temperature of the oil conservator and executing cooling operation on the internal environment of the oil conservator when the internal temperature of the oil conservator exceeds a preset temperature threshold value.
2. The system for analyzing the state of a high-voltage ceramic bushing according to claim 1, wherein:
the embedded processor is respectively connected with the cooling mechanism, the temperature measuring mechanism, the pressure regulating mechanism and the miniature camera shooting mechanism.
3. The system for analyzing the state of a high-voltage ceramic bushing according to claim 2, wherein:
the miniature camera shooting mechanism is arranged opposite to the high-voltage ceramic bushing and used for executing instant camera shooting operation on the working environment of the high-voltage ceramic bushing so as to obtain a corresponding instant acquisition frame.
4. The high voltage ceramic bushing condition resolution system of claim 3, further comprising:
the signal decomposition equipment is connected with the miniature camera shooting mechanism and is used for performing the disassembling processing of the hue component value, the brightness component value and the saturation component value under the HSB space on the received instant acquisition frame so as to obtain a first component picture, a second component picture and a third component picture corresponding to the instant acquisition frame;
a component sharpening device, connected to the signal decomposition mechanism, for performing sharpening processing on the received first component picture by using high-pass filtered image data to obtain a first sharpened picture, performing sharpening processing on the received second component picture by using spatial differentiation mode image data to obtain a second sharpened picture, and performing edge sharpening processing on the received third component picture to obtain a third sharpened picture;
the superposition execution device is connected with the component sharpening device and is used for carrying out pixel-by-pixel superposition on the first sharpened picture, the second sharpened picture and the third sharpened picture so as to obtain a targeted sharpened picture corresponding to the instant acquisition frame;
the area analysis device is connected with the superposition execution device and used for analyzing an image area with the largest area in each image area with the appearance characteristics of the high-voltage ceramic bushing from the targeted sharpening picture by using the appearance characteristics of the high-voltage ceramic bushing so as to output the image area as a reference area;
the information extraction equipment is connected with the region analysis equipment and is used for acquiring each gray value of each pixel point of the reference region and outputting the gray value with the largest occurrence frequency as a reference gray value;
the dosage conversion equipment is connected with the information extraction equipment and used for sending a cleaning request command when the received reference gray value is greater than or equal to a preset gray limit value, and determining the reference dosage of the cleaning agent for cleaning the high-pressure ceramic bushing based on the difference value between the reference gray value and the preset gray limit value;
performing a decomposition process of a hue component value, a brightness component value and a saturation component value in an HSB space on a received instant acquisition frame to obtain a first component picture, a second component picture and a third component picture corresponding to the instant acquisition frame includes: acquiring hue component values, brightness component values and saturation component values of each pixel point of a received instant acquisition frame in an HSB space, and combining the hue component values of each pixel point of the instant acquisition frame into a first component picture corresponding to the instant acquisition frame;
the method for obtaining the first component picture, the second component picture and the third component picture corresponding to the instant acquisition frame by performing the decomposition processing of the hue component value, the brightness component value and the saturation component value in the HSB space on the received instant acquisition frame further comprises the following steps: and combining the brightness component values of all the pixel points of the instant acquisition frame into a second component picture corresponding to the instant acquisition frame, and combining the saturation component values of all the pixel points of the instant acquisition frame into a third component picture corresponding to the instant acquisition frame.
5. The system for analyzing the state of a high-voltage ceramic bushing according to claim 4, wherein:
the command triggering device is further used for sending a cleaning-free command when the received reference gray value is smaller than the preset gray limit.
6. The high-voltage ceramic bushing condition resolution system of claim 5, wherein:
performing a decomposition process of a hue component value, a brightness component value, and a saturation component value in an HSB space on a received instant acquisition frame to obtain a first component picture, a second component picture, and a third component picture corresponding to the instant acquisition frame, further includes: the received instant acquisition frame, the first component picture, the second component picture and the third component picture have equal resolution.
7. The high voltage ceramic bushing condition resolution system of claim 6, further comprising:
and the time-sharing configuration interface is respectively connected with the signal decomposition device, the direction sharpening device, the superposition execution device, the region analysis device, the information extraction device and the dosage conversion device.
8. The system for analyzing the state of a high-voltage ceramic bushing according to claim 7, wherein:
the time-sharing configuration interface is used for completing sequential configuration of the operating parameters of the signal decomposition device, the direction dividing sharpening device, the superposition execution device, the region analysis device, the information extraction device and the dose conversion device in a time-sharing manner according to different configuration addresses by adopting a parallel communication line.
9. The high voltage ceramic bushing condition resolution system of claim 8, further comprising:
the clock generating mechanism is respectively connected with the signal decomposition device, the direction dividing sharpening device, the superposition execution device, the region analysis device, the information extraction device and the dose conversion device;
the clock generating mechanism is used for respectively providing required working time sequences for the signal decomposition device, the direction dividing sharpening device, the superposition executing device, the region analyzing device, the information extracting device and the dose conversion device.
10. The system for analyzing the state of a high-voltage ceramic bushing according to claim 9, wherein:
the embedded processor is used for respectively configuring the respective operating parameters of the cooling mechanism, the pressure regulating mechanism and the miniature camera shooting mechanism.
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