Image recognition-based high-voltage bushing working state monitoring system and method

Abstract

The application discloses a high-voltage bushing working state monitoring system based on image recognition, wherein a network camera acquires image information in real time when a transformer high-voltage bushing is working, a chroma recognition sensor acquires chroma wavelength values in real time when the transformer high-voltage bushing is working, a temperature sensor acquires temperature information in real time when the transformer high-voltage bushing is working, a data processor judges deformation abnormalities of the appearance of the transformer high-voltage bushing, judges abnormalities of the temperature of the transformer high-voltage bushing, and judges abnormalities of chroma wavelength changes of the transformer high-voltage bushing. The application can realize real-time monitoring of the aging state of the high-voltage bushing, judges the aging state from multiple dimensions, and improves the accuracy of the judgment.

Description

Technical Field

[0001] This invention relates to the field of high-voltage bushing aging condition monitoring technology, specifically to a high-voltage bushing working condition monitoring system and method based on image recognition. Background Technology

[0002] High-voltage bushings are protective devices used in static electrical equipment to carry and transform AC voltage and current to transmit AC electrical energy. They are an important component of transformers, serving to fix internal outgoing lines and insulate the transformer from the power grid. Different voltage levels mean different bushing dimensions. Consequently, the loss of the insulating medium inside the bushing and the Joule heating generated by current conduction cause localized hot spots, leading to chemical changes in the bushing material. This results in changes in the bushing's color, accelerates overall aging, and reduces its service life.

[0003] Taking into account the color changes caused by prolonged exposure to high-voltage bushings and the resulting increase in temperature, qualitatively and in real-time identifying and issuing early warnings of safety hazards caused by abnormal aging of high-voltage bushings is a critical technical problem that needs to be solved in the operation and maintenance management of high-voltage bushings. Currently, bushing monitoring involves deploying mechanical current and voltage signal sensors around the bushing, analyzing and converting parameters based on changes in these signals. However, this method suffers from limited data acquisition, a high equipment failure rate, insufficient accuracy, and the inability to directly interpret the results. Summary of the Invention

[0004] The purpose of this invention is to provide a high-voltage bushing working status monitoring system and method based on image recognition. This invention can monitor the aging status of high-voltage bushings in real time, judge aging from multiple dimensions, and improve the accuracy of the judgment.

[0005] To achieve this objective, the high-voltage bushing operating status monitoring system based on image recognition designed in this invention includes a network camera, a colorimetric sensor, a temperature sensor, and a data processor. The network camera is used to acquire image information of the transformer's high-voltage bushing in real time. The colorimetric sensor is used to acquire the colorimetric wavelength values ​​of the transformer's high-voltage bushing in real time using a spectrophotometer. The temperature sensor is used to acquire the temperature information of the transformer's high-voltage bushing in real time. The data processor pre-stores standard image information of the transformer's high-voltage bushing during operation, the inherent colorimetric wavelength values ​​of the high-voltage bushing, a colorimetric wavelength change reference table for the high-voltage bushing, and the standard temperature range of the transformer's high-voltage bushing during operation.

[0006] The data processor is used to compare the image information of the transformer high-voltage bushing during operation in real time with the standard image information of the transformer high-voltage bushing during operation. When the image similarity is less than the similarity threshold, it is judged as an abnormal deformation of the appearance of the transformer high-voltage bushing.

[0007] The data processor is used to compare the real-time temperature information of the transformer high-voltage bushing during operation with the standard temperature range of the transformer high-voltage bushing during operation. When the temperature of the transformer high-voltage bushing during operation is not within the standard temperature range of the transformer high-voltage bushing during operation, it is judged that the temperature of the transformer high-voltage bushing is abnormal.

[0008] The data processor is used to subtract the chromatic wavelength value of the high-voltage bushing during operation from the inherent chromatic wavelength value of the high-voltage bushing to obtain the chromatic wavelength change value of the high-voltage bushing. The chromatic wavelength change value of the high-voltage bushing is compared with the chromatic wavelength change reference table of the high-voltage bushing. When the chromatic wavelength change value of the high-voltage bushing is within the chromatic abnormal range of the chromatic wavelength change reference table of the high-voltage bushing, it is judged that the chromatic wavelength change of the high-voltage bushing of the transformer is abnormal.

[0009] The beneficial effects of this invention are:

[0010] This invention achieves real-time monitoring of the high-voltage bushing's operating status by installing a network camera on the high-voltage bushing to capture images of the transformer's exterior, using a spectrophotometer to detect changes in bushing color during transformer operation, and employing a temperature sensor to obtain information about the transformer's internal operating conditions. Furthermore, this image recognition-based high-voltage bushing aging status monitoring system uses warning lights on an LED display screen. When the server determines a color change or the operating temperature exceeds a set threshold, it activates the warning lights to alert management personnel to promptly perform transformer maintenance. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the principle of the present invention;

[0012] Among them, 1—network camera, 2—color recognition sensor, 3—temperature sensor, 4—data processor, 5—data transmission box, 6—database, and 7—LED display screen. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0014] like Figure 1The high-voltage bushing operation status monitoring system shown includes a network camera 1, a colorimetric sensor 2, a temperature sensor 3, and a data processor 4. The network camera 1 is used to acquire image information of the transformer's high-voltage bushing in real time. The colorimetric sensor 2 is used to acquire the colorimetric wavelength value of the transformer's high-voltage bushing in real time using a spectrophotometer. The temperature sensor 3 is used to acquire the temperature information of the transformer's high-voltage bushing in real time. The data processor 4 pre-stores standard image information of the transformer's high-voltage bushing during operation, the inherent colorimetric wavelength value of the high-voltage bushing (i.e., the colorimetric wavelength value when the transformer bushing is not operating), a colorimetric wavelength change reference table for the high-voltage bushing, and the standard temperature range of the transformer's high-voltage bushing during operation. The high-voltage bushing itself is a protective device for static electrical equipment that carries and transforms AC voltage and current to transmit AC power.

[0015] The data processor 4 is used to compare the image information of the transformer high-voltage bushing during operation with the standard image information of the transformer high-voltage bushing during operation. When the image similarity is less than the similarity threshold, it is judged as an abnormal deformation of the appearance of the transformer high-voltage bushing (appearance changes caused by bushing aging or damage).

[0016] Data processor 4 is used to compare the real-time temperature information of the transformer high-voltage bushing during operation with the standard temperature range of the transformer high-voltage bushing during operation. When the temperature of the transformer high-voltage bushing during operation is not within the standard temperature range of the transformer high-voltage bushing during operation, it is judged that the temperature of the transformer high-voltage bushing is abnormal.

[0017] Data processor 4 is used to subtract the chromatic wavelength value of the high-voltage bushing during operation from the inherent chromatic wavelength value of the high-voltage bushing to obtain the chromatic wavelength change value of the high-voltage bushing. The chromatic wavelength change value of the high-voltage bushing is compared with the chromatic wavelength change reference table of the high-voltage bushing. When the chromatic wavelength change value of the high-voltage bushing is within the chromatic abnormal range of the chromatic wavelength change reference table of the high-voltage bushing, it is judged that the chromatic wavelength change of the high-voltage bushing of the transformer is abnormal.

[0018] In the above technical solution, the network camera 1 is installed on the transformer casing, and the color recognition sensor 2 and temperature sensor 3 are installed on the external flange of the transformer bushing.

[0019] In the above technical solution, the high-voltage bushing chromaticity wavelength change reference table classifies changes as follows: a change in wavelength within the range of 50–100 μm is considered a slight chromaticity wavelength change; a change within the range of 100–200 μm is considered a moderate chromaticity wavelength change; a change above 200 μm is considered a severe chromaticity wavelength change; and a change below 50 μm is considered a normal chromaticity wavelength change. The normal color of a transformer bushing is the chromaticity value of the bushing itself. However, when a transformer bushing ages or undergoes abnormal changes, its chromaticity value will change. Therefore, the change in chromaticity value is used as the basis for judging the normal or abnormal operating state of the transformer bushing. A slight color change corresponds to the beginning of aging abnormalities in the bushing; a moderate color change corresponds to the bushing being in an aging state requiring replacement; and a severe color change indicates that the bushing is in a dangerous and accident-prone state.

[0020] In the above technical solution, the network camera 1 is an industrial-grade camera based on a CCD image sensor. There are five network cameras 1, which are respectively distributed on the front, back, left, right and bottom of the transformer.

[0021] In the above technical solution, the standard temperature range of the transformer high-voltage bushing during operation is -25 to 100℃.

[0022] In the above technical solution, the data processor 4 is used to compare the image information of the transformer high-voltage bushing during operation in real time with the standard image information of the transformer high-voltage bushing during operation, compare the Hamming distance of the image hash values ​​between the real-time image information and the standard image information, and determine the similarity based on the Hamming distance. When the image similarity is less than the similarity threshold, it is judged as a deformation of the appearance of the transformer high-voltage bushing.

[0023] In the above technical solution, when the judgment result shows that the high-voltage bushing has abnormal deformation of the transformer high-voltage bushing appearance and / or abnormal temperature and / or abnormal change of chromaticity wavelength, the data processor 4 issues a high-voltage bushing operation abnormality alarm.

[0024] In the above technical solution, the bushing anomaly judgment result of the data processor 4 is transmitted to the database 6 through the data transmission box 5. The LED display screen 7 displays the bushing anomaly judgment result in the database 6, enabling the background management personnel to view and monitor the working status of the high-voltage bushing in real time. The data transmission box 5 is equipped with a 5G communication module and establishes a long HTTP connection for data transmission with the database 6.

[0025] The power supply provides power to the network camera 1, colorimetric sensor 2, temperature sensor 3, and data transmission box 5. The power supply utilizes either a solar photovoltaic panel and a battery or a wind turbine and a battery. The wind turbine is a small 300W wind turbine with three blades, and the solar photovoltaic panel is a 300W solar photovoltaic panel measuring 1960mm*990mm*35mm.

[0026] A method for monitoring the working status of high-voltage bushings based on an upper system includes the following steps:

[0027] Step 1: Pre-store the standard image information of the transformer high-voltage bushing during operation, the inherent chromaticity wavelength value of the high-voltage bushing, the chromaticity wavelength change comparison table of the high-voltage bushing, and the standard temperature range of the transformer high-voltage bushing during operation in the data processor 4.

[0028] Step 2: The network camera 1 acquires image information of the transformer high-voltage bushing in real time, the colorimetric sensor 2 acquires the colorimetric wavelength value of the transformer high-voltage bushing in real time using a spectrophotometer, and the temperature sensor 3 acquires the temperature information of the transformer high-voltage bushing in real time.

[0029] Step 3: The data processor 4 compares the image information of the transformer high-voltage bushing during operation with the standard image information of the transformer high-voltage bushing during operation. When the image similarity is less than the similarity threshold, it is judged that the transformer high-voltage bushing has abnormal deformation.

[0030] Data processor 4 will compare the real-time temperature information of the transformer high-voltage bushing with the standard temperature range of the transformer high-voltage bushing. When the temperature of the transformer high-voltage bushing is not within the standard temperature range of the transformer high-voltage bushing, it will be judged as an abnormal temperature of the transformer high-voltage bushing.

[0031] Data processor 4 subtracts the chromatic wavelength value of the high-voltage bushing during operation from the inherent chromatic wavelength value of the high-voltage bushing to obtain the chromatic wavelength change value of the high-voltage bushing. The chromatic wavelength change value of the high-voltage bushing is compared with the chromatic wavelength change reference table of the high-voltage bushing. When the chromatic wavelength change value of the high-voltage bushing is within the chromatic abnormal range of the chromatic wavelength change reference table of the high-voltage bushing, it is judged that the chromatic wavelength change of the high-voltage bushing of the transformer is abnormal.

[0032] This invention achieves real-time monitoring of the aging status of high-voltage bushings by installing a network camera on the high-voltage bushing to capture images of the transformer's exterior, using a spectrophotometer to detect changes in bushing color during transformer operation, and employing a temperature sensor to obtain the transformer's internal temperature. Furthermore, this invention utilizes warning lights on an LED display screen. When the server determines that there is oil leakage in the transformer or that the operating temperature exceeds a set threshold, the warning lights are activated to issue an early warning, reminding management personnel to promptly perform inspection and maintenance of the high-voltage bushings.

[0033] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

Claims

1. A high-voltage bushing operating status monitoring system based on image recognition, characterized in that: It includes a webcam (1), a colorimetric sensor (2), a temperature sensor (3), and a data processor (4). The webcam (1) is used to acquire image information of the transformer high-voltage bushing in real time. The colorimetric sensor (2) is used to acquire the colorimetric wavelength value of the transformer high-voltage bushing in real time using a spectrophotometer. The temperature sensor (3) is used to acquire the temperature information of the transformer high-voltage bushing in real time. The data processor (4) has pre-stored standard image information of the transformer high-voltage bushing in operation, inherent colorimetric wavelength value of the high-voltage bushing, colorimetric wavelength change comparison table of the high-voltage bushing, and standard temperature range of the transformer high-voltage bushing in operation. The data processor (4) is used to compare the image information of the transformer high-voltage bushing when it is working in real time with the standard image information of the transformer high-voltage bushing when it is working. When the image similarity is less than the similarity threshold, it is judged as abnormal deformation of the appearance of the transformer high-voltage bushing. The data processor (4) is used to compare the real-time temperature information of the transformer high-voltage bushing during operation with the standard temperature range of the transformer high-voltage bushing during operation. When the temperature of the transformer high-voltage bushing during operation is not within the standard temperature range of the transformer high-voltage bushing during operation, it is judged that the transformer high-voltage bushing temperature is abnormal. The data processor (4) is used to subtract the chromatic wavelength value of the high-voltage bushing when it is working from the inherent chromatic wavelength value of the high-voltage bushing to obtain the chromatic wavelength change value of the high-voltage bushing. The chromatic wavelength change value of the high-voltage bushing is compared with the chromatic wavelength change reference table of the high-voltage bushing. When the chromatic wavelength change value of the high-voltage bushing is within the chromatic abnormal range of the chromatic wavelength change reference table of the high-voltage bushing, it is judged that the chromatic wavelength change of the high-voltage bushing of the transformer is abnormal. The high-voltage bushing chromaticity wavelength change reference table indicates the following: a chromaticity wavelength change range of 50-100μm is considered a slight chromaticity wavelength change; a range of 100-200μm is considered a moderate chromaticity wavelength change; a range of over 200μm is considered a severe chromaticity wavelength change; and a range below 50μm is considered a normal chromaticity wavelength change. Slight color change corresponds to the bushing beginning to show signs of aging; moderate color change corresponds to the bushing being in an aging state requiring replacement; and severe color change indicates the bushing is in a dangerous and accident-prone state.

2. The high-voltage bushing operating status monitoring system based on image recognition according to claim 1, characterized in that: The network camera (1) is installed on the transformer casing, and the color recognition sensor (2) and temperature sensor (3) are installed on the external flange of the transformer bushing.

3. The high-voltage bushing operating status monitoring system based on image recognition according to claim 1, characterized in that: The network camera (1) is an industrial-grade camera based on a CCD image sensor. There are five network cameras (1), which are distributed on the front, back, left, right and bottom of the transformer.

4. The high-voltage bushing operating status monitoring system based on image recognition according to claim 1, characterized in that: The standard temperature range for the high-voltage bushing of the transformer during operation is -25~100℃.

5. The high-voltage bushing operating status monitoring system based on image recognition according to claim 1, characterized in that: The data processor (4) is used to compare the image information of the transformer high-voltage bushing when it is working in real time with the standard image information of the transformer high-voltage bushing when it is working, compare the Hamming distance of the image hash value between the real-time image information and the standard image information, and determine the similarity based on the Hamming distance. When the image similarity is less than the similarity threshold, it is judged as a deformation of the appearance of the transformer high-voltage bushing.

6. The high-voltage bushing operating status monitoring system based on image recognition according to claim 1, characterized in that: When the judgment result indicates that the high-voltage bushing has abnormal deformation of the transformer high-voltage bushing appearance and / or abnormal temperature and / or abnormal change of chromaticity wavelength, the data processor (4) issues a high-voltage bushing operation abnormality alarm.

7. A method for monitoring the working status of a high-voltage bushing based on the system described in claim 1, characterized in that, It includes the following steps: Step 1: Pre-store the standard image information of the transformer high-voltage bushing during operation, the inherent chromaticity wavelength value of the high-voltage bushing, the chromaticity wavelength change comparison table of the high-voltage bushing, and the standard temperature range of the transformer high-voltage bushing during operation in the data processor (4); Step 2: The network camera (1) acquires the image information of the transformer high-voltage bushing in real time, the colorimetric sensor (2) acquires the colorimetric wavelength value of the transformer high-voltage bushing in real time using a spectrophotometer, and the temperature sensor (3) acquires the temperature information of the transformer high-voltage bushing in real time. Step 3: The data processor (4) compares the image information of the transformer high-voltage bushing during operation with the standard image information of the transformer high-voltage bushing during operation. When the image similarity is less than the similarity threshold, it is judged as an abnormal deformation of the appearance of the transformer high-voltage bushing. The data processor (4) compares the real-time temperature information of the transformer high-voltage bushing during operation with the standard temperature range of the transformer high-voltage bushing during operation. When the temperature of the transformer high-voltage bushing during operation is not within the standard temperature range of the transformer high-voltage bushing during operation, it is judged that the transformer high-voltage bushing temperature is abnormal. The data processor (4) subtracts the chromatic wavelength value of the high-voltage bushing when it is working from the inherent chromatic wavelength value of the high-voltage bushing to obtain the chromatic wavelength change value of the high-voltage bushing. The chromatic wavelength change value of the high-voltage bushing is compared with the chromatic wavelength change reference table of the high-voltage bushing. When the chromatic wavelength change value of the high-voltage bushing is within the chromatic abnormal range of the chromatic wavelength change reference table of the high-voltage bushing, it is judged that the chromatic wavelength change of the high-voltage bushing of the transformer is abnormal.

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