Method and system for remotely determining service performance of high-voltage disconnector contact plating

Abstract

The application provides a method and system for remotely measuring service performance of a high-voltage isolator contact coating. The system collects and identifies the gray scale values of the high-voltage isolator contact and the contact finger in the high-voltage isolator image, quantitatively calculates the discoloration degree of the contact and the contact finger compared with the initial state, and calculates the discoloration degree and the discoloration area ratio of the contact and the contact finger compared with the initial state, so as to evaluate the service performance of the high-voltage isolator contact coating. The system comprises a camera, an image recognition module and a quantitative evaluation module.

Description

Technical Field

[0001] This invention relates to the field of intelligent monitoring and maintenance technology for electrical equipment, and in particular to a method and system for remotely measuring the service performance of the plating coating of high-voltage disconnecting switches. Background Technology

[0002] High-voltage disconnect switches are important electrical equipment in power systems. By plating silver, graphene, or silver-graphene coatings on the contact surfaces of disconnect switch contacts, contact performance can be effectively improved, including corrosion resistance, hardness, and bending resistance, which is of great economic and value significance.

[0003] Currently, the performance evaluation of the contact plating of high-voltage disconnect switches requires relevant personnel to conduct on-site inspections, which is time-consuming and labor-intensive. Summary of the Invention

[0004] Considering the lack of a quantitative method for evaluating the service performance of high-voltage disconnector switch contact plating in existing technologies, this invention proposes a method and system for remotely measuring the service performance of high-voltage disconnector switch contact plating. Given that existing substation engineering auxiliary control systems utilize fixed video surveillance equipment deployed at the construction site, which has essentially achieved comprehensive security monitoring of the on-site equipment operation and maintenance status and the project perimeter, the conditions are met to remotely measure the service performance of high-voltage disconnector switch contact plating using video images from the on-site auxiliary control system.

[0005] This invention creatively proposes a method to assess the service performance of high-voltage disconnector contact coatings by identifying the grayscale values ​​of high-voltage disconnector contacts and fingers in an image, quantitatively calculating the degree of discoloration of the contacts and fingers compared to their initial state, and using this method. Based on this, the service performance of high-voltage disconnector contact coatings can be automatically and intelligently measured using appropriate image recognition equipment and quantitative evaluation.

[0006] The present invention specifically adopts the following technical solution: A method for remotely measuring the service performance of high-voltage disconnect switch contact coatings: by acquiring and identifying the grayscale values ​​of the high-voltage disconnect switch contacts and fingers in the high-voltage disconnect switch image, the degree of discoloration of the contacts and fingers compared to the initial state is quantitatively calculated, and the degree of discoloration and the proportion of discoloration area of ​​the contacts and fingers compared to the initial state are calculated, thereby realizing the evaluation of the service performance of the high-voltage disconnect switch contact coatings.

[0007] Furthermore, a coordinate system (X, Y) is established with the lower left corner of the high-voltage disconnector image as the origin; each pixel in the image is traversed from the upper left to the lower right. If the pixel is identified as a contact or finger, then flag(X, Y) = 1, otherwise flag(X, Y) = 0; GSV(X, Y) takes the grayscale value of the pixel.

[0008] Furthermore, after collecting and extracting the grayscale values ​​of all pixels involving the contact or finger, the following calculations are performed: .

[0009] Furthermore, the coating discoloration level is divided into three levels. The first level is when the discoloration area accounts for more than 80% or the discoloration degree is more than 60%, indicating low coating service performance. The third level is when the discoloration area accounts for less than 50% and the discoloration degree is less than 30%, indicating high coating service performance. The rest are the second level, indicating medium coating service performance.

[0010] Furthermore, if the calculated color change value exceeds the set threshold, a warning message will be issued.

[0011] And, a system for remotely measuring the service performance of the plating coating of high-voltage disconnect switch contacts, comprising: a camera, an image recognition module, and a quantitative evaluation module; The camera is fixed next to the high-voltage disconnect switch and outside the safe distance range of the equipment voltage level, and is aimed at the contacts and contact fingers of the high-voltage disconnect switch whose service performance of the contact plating needs to be remotely measured; the acquired images are transmitted to the image recognition module; The image recognition module is used to acquire and recognize the grayscale values ​​of the high-voltage disconnect switch contacts and fingers in the high-voltage disconnect switch image, and transmit them to the quantization evaluation module; The quantitative evaluation module is used to quantitatively calculate the degree of discoloration of the contacts and fingers compared to the initial state, and to calculate the degree of discoloration and the proportion of discolored area of ​​the contacts and fingers compared to the initial state, thereby evaluating the service performance of the high-voltage disconnector contact coating.

[0012] Furthermore, the image recognition module and / or quantization evaluation module are located at the far end of the camera.

[0013] Furthermore, it also includes a camera bracket for mounting and securing the camera; and a power supply assembly for providing power.

[0014] Furthermore, the quantitative evaluation module is located in the microcomputing unit.

[0015] Furthermore, the camera periodically takes photos and transmits them to the image recognition module; or transmits video data to the image recognition module, and then obtains image samples for grayscale calculation by frame capture.

[0016] Compared with existing technologies, this invention and its preferred embodiment propose for the first time to quantitatively evaluate the service performance of the high-voltage disconnector contact coating by quantitatively calculating the degree of discoloration of the contacts and fingers compared to their initial state; this enables it to be implemented at a lower cost and with less complexity based on existing technologies, with low modification difficulty and significant effects, and can achieve automated discrimination.

[0017] Furthermore, it was proposed to remotely measure the service performance of the high-voltage disconnector contact coating using a video camera, which can ensure long-term stable operation. Attached Figure Description

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a flowchart illustrating the implementation of an embodiment of the present invention; Figure 2 This is a schematic diagram of the system structure according to an embodiment of the present invention. Detailed Implementation

[0019] In the following, specific embodiments of this application will be described in detail with reference to the accompanying drawings. Based on these detailed descriptions, those skilled in the art will be able to clearly understand and implement this application. Without departing from the principles of this application, features from various embodiments can be combined to obtain new implementations, or certain features from some embodiments can be substituted to obtain other preferred implementations.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] To make the features and advantages of this patent more apparent and understandable, specific embodiments are provided below for detailed explanation: It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] The following describes the present invention in further detail through two specific embodiments: In the first implementation scheme, the following steps are followed: Figure 1 As shown: If there are no directly usable fixed video surveillance devices on site (i.e., the substation engineering auxiliary control system video surveillance does not cover the area of ​​the high-voltage disconnect switchgear to be remotely measured), then it is necessary to install and deploy video cameras yourself. The specific steps are as follows: S1: Fix the video camera in a position near the high-voltage disconnect switch but outside the safe distance range of the equipment voltage level.

[0023] S2: Point the video camera at the contacts and fingers of the high-voltage disconnector switch where the service performance of the contact plating needs to be remotely measured.

[0024] S3: Run and activate the image recognition device, identify and capture the corresponding contact and finger portions from the video camera frame according to resolution, and capture one frame as the analysis object. Establish a coordinate system (X, Y) with the lower left corner of the frame as the origin. Traverse each pixel of the frame from the upper left to the lower right. If the pixel is identified as a contact or finger, then flag(X, Y) = 1; otherwise, flag(X, Y) = 0. GSV (gray scale value) (X, Y) takes the grayscale value (0~255) of the pixel.

[0025] S4: The video camera periodically captures videos or photos and transmits them to the image recognition device. The image recognition device identifies the grayscale values ​​of the high-voltage disconnector switch contacts and fingers in the images, quantifies and calculates the degree of discoloration of the contacts and fingers compared to their initial state, calculates the degree of discoloration and the proportion of discoloration area, and evaluates the service performance of the high-voltage disconnector switch contact plating.

[0026] The coating discoloration level is divided into 1 to 3 levels. Level 1 is when the discoloration area accounts for more than 80% or the discoloration degree is more than 60%, indicating low service performance of the coating. Level 3 is when the discoloration area accounts for less than 50% and the discoloration degree is less than 30%, indicating high service performance of the coating. All other cases are Level 2, indicating medium service performance of the coating.

[0027] S5: If the above color change level exceeds the set threshold (e.g., level 2), a warning message will be issued.

[0028] In the second implementation scheme, if there are readily available fixed video surveillance devices on site (i.e., the video surveillance of the substation engineering auxiliary control system already covers the area of ​​the high-voltage disconnecting switchgear to be remotely measured), the specific steps adopted are as follows: S1: Select video surveillance equipment covering the area of ​​the high-voltage disconnect switchgear to be remotely measured at the engineering site, and control it.

[0029] S2: Point the video camera at the contacts and fingers of the high-voltage disconnector switch where the service performance of the contact plating needs to be remotely measured.

[0030] S3: Call the video monitoring screen of the device and run and start the image recognition device. Identify and capture the corresponding contact and finger portions of the video image from the camera according to resolution, and capture a frame as the analysis object. Establish a coordinate system (X, Y) with the lower left corner of the screen as the origin. Traverse each pixel of the screen from the upper left to the lower right. If the pixel is identified as a contact or finger, then flag(X, Y) = 1; otherwise, flag(X, Y) = 0. GSV (gray scale value) (X, Y) takes the grayscale value (0~255) of the pixel.

[0031] S4: The video camera periodically takes photos and transmits them to the image recognition device. The image recognition device identifies the grayscale values ​​of the high-voltage disconnector contacts and fingers in the images, quantifies and calculates the degree of discoloration of the contacts and fingers compared to their initial state, calculates the degree of discoloration and the proportion of discoloration area, and evaluates the service performance of the high-voltage disconnector contact coating.

[0032] The coating discoloration level is divided into 1 to 3 levels. Level 1 is when the discoloration area accounts for more than 80% or the discoloration degree is more than 60%, indicating low service performance of the coating. Level 3 is when the discoloration area accounts for less than 50% and the discoloration degree is less than 30%, indicating high service performance of the coating. All other cases are Level 2, indicating medium service performance of the coating.

[0033] S5: If the above color change level exceeds the set threshold (e.g., level 2), a warning message will be issued.

[0034] Based on the above design, as a preferred embodiment, the present invention also proposes a system for remotely measuring the service performance of the plating coating of high-voltage disconnecting switch contacts. This system mainly includes: (1) Video camera. (2) Image recognition device. (3) Microcomputing unit. (4) Power supply components (photovoltaic panel and battery). (5) Video camera bracket.

[0035] The video camera is mounted and fixed using a video camera bracket, and the video camera, image recognition device, and microcomputing unit are powered by power supply components (photovoltaic panels and batteries).

[0036] It is important to note that the image recognition device can be integrated with a camera, set up independently on a corresponding computing device, or implemented through a microcomputing unit along with the aforementioned quantitative evaluation module. Here, the microcomputing unit and the camera can be located locally and powered uniformly, transmitting the output judgment results (e.g., generating an alarm) to a remote backend. Alternatively, it can be directly set up in the backend center, serving solely as a virtual module for calculation and judgment within the management and maintenance system.

[0037] Therefore, the preferred system device schemes mentioned above are not the only embodiments of the present invention, nor can they be regarded as the only limitation on the scope of protection of the present invention. They are only used as a reference for those skilled in the art to implement the present invention.

[0038] The solution proposed in this invention can remotely measure the service performance of the plating on high-voltage disconnecting switch contacts. It quantitatively calculates the degree of discoloration of the contacts and fingers compared to their initial state, thereby quantitatively evaluating the service performance of the high-voltage disconnecting switch contact plating.

[0039] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

[0040] The computational and logical judgment parts of the system and method provided in this embodiment can be stored in a computer-readable storage medium in the form of code, implemented in the form of a computer program, and the basic parameter information required for the calculation can be input through computer hardware, and the calculation results can be output.

[0041] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0042] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

[0044] This patent is not limited to the above-described preferred embodiments. Anyone can derive other methods and systems for remotely measuring the service performance of high-voltage disconnector contact coatings based on the guidance of this patent. All equivalent variations and modifications made within the scope of this patent application shall fall within the scope of this patent.

Claims

1. A method for remotely measuring the service performance of the plating coating of high-voltage disconnecting switch contacts, characterized in that: By collecting and identifying the grayscale values ​​of the contacts and fingers of the high-voltage disconnecting switch in the image, the degree of discoloration of the contacts and fingers compared with the initial state is quantitatively calculated, and the degree of discoloration and the proportion of discoloration area of ​​the contacts and fingers compared with the initial state are calculated, thereby realizing the evaluation of the service performance of the coating of the high-voltage disconnecting switch contacts. Establish a coordinate system (X, Y) with the lower left corner of the high-voltage disconnector image as the origin; traverse each pixel of the image from the upper left to the lower right. If the pixel is identified as a contact or finger, then flag(X, Y) = 1, otherwise flag(X, Y) = 0; GSV(X, Y) takes the gray value of the pixel. After collecting and extracting the grayscale values ​​of all pixels involving the contact or finger, perform the following calculations: The coating discoloration level is divided into three levels. The first level is when the discoloration area accounts for more than 80% or the discoloration degree is more than 60%, which indicates low coating service performance. The third level is when the discoloration area accounts for less than 50% and the discoloration degree is less than 30%, which indicates high coating service performance. All other cases are the second level, which indicates medium coating service performance.

2. The method for remotely measuring the service performance of the plating coating of high-voltage disconnecting switch contacts according to claim 1, characterized in that: If the calculated color change value exceeds the set threshold, a warning message will be issued.

3. A system for remotely measuring the service performance of the plating coating of high-voltage disconnecting switch contacts, used to implement the method as described in claim 1, characterized in that, include: Camera, image recognition module, and quantitative evaluation module; The camera is fixed next to the high-voltage disconnect switch and outside the safe distance range of the equipment voltage level, and is aimed at the contacts and contact fingers of the high-voltage disconnect switch whose service performance of the contact plating needs to be remotely measured; the acquired images are transmitted to the image recognition module; The image recognition module is used to acquire and recognize the grayscale values ​​of the high-voltage disconnect switch contacts and fingers in the high-voltage disconnect switch image, and transmit them to the quantization evaluation module; The quantitative evaluation module is used to quantitatively calculate the degree of discoloration of the contacts and fingers compared to the initial state, and to calculate the degree of discoloration and the proportion of discolored area of ​​the contacts and fingers compared to the initial state, thereby evaluating the service performance of the high-voltage disconnector contact coating.

4. The system for remotely measuring the service performance of the plating coating of high-voltage disconnecting switch contacts according to claim 3, characterized in that: The image recognition module and / or quantitative evaluation module are located at the far end of the camera.

5. The system for remotely measuring the service performance of the plating coating of high-voltage disconnecting switch contacts according to claim 3, characterized in that: It also includes a camera bracket for mounting and securing the camera; and a power supply unit for providing power.

6. The system for remotely measuring the service performance of the plating coating of high-voltage disconnecting switch contacts according to claim 3, characterized in that: The quantitative evaluation module is located in the microcomputing unit.

7. The system for remotely measuring the service performance of the plating coating of high-voltage disconnecting switch contacts according to claim 3, characterized in that: The camera periodically takes photos and transmits them to the image recognition module; or transmits video data to the image recognition module, and then obtains image samples for grayscale calculation by frame extraction.

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