Visual identification device and system for opening and closing states of GIS disconnecting link body

Abstract

The utility model discloses a visual identification device and system for the on-off state of a GIS disconnecting link body, and the device comprises an analog video distribution module, a picture synthesis output module, an analog video-to-digital video module, an image identification module, an IO dry contact output module, a warning lamp control module, and a plurality of external interfaces. The external interface comprises six dry contact output ports which are respectively corresponding to an A-phase opening and closing node, a B-phase opening and closing node and a C-phase opening and closing node of a GIS disconnecting link, and the plurality of warning lamps are used for representing in-place closing, non-in-place closing, in-place opening and non-in-place opening states of the A, B and C phases; according to the utility model, non-contact real-time monitoring of the on-off state of the disconnecting link body is realized, an operation user is reminded of the normal or abnormal switching condition through the warning lamp, the working efficiency and the safety are improved, non-contact acquisition and identification are realized, the influence of mechanical wear and aging is avoided, real-time visual analysis is realized, and personnel are not depended on.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent monitoring of transformer substations and converter stations, and in particular to a device and system for visually identifying the opening and closing states of a GIS knife switch body. Background Art

[0002] The knife switch is mainly used to reliably isolate the part of the high-voltage distribution device that needs to be shut down from the live part, so as to ensure the safety of maintenance work. Therefore, if the knife switch is not opened or closed properly, it will have a very important impact on the normal operation of the line and the life safety of the substation maintenance personnel.

[0003] Currently, the open / close status of knife switches is generally determined by using an attitude sensor to sense the operating posture of the high-voltage switchgear online, measure the opening and closing angles of the high-voltage switch, determine the open / close status, and upload the status to the backend. Alternatively, the open / close status of the knife switch can be reconfirmed by visual observation.

[0004] The method using attitude sensors can cause errors in information transmission over time due to wear and aging. Furthermore, attitude sensors require contact installation, and the high current flowing through the knife switch could affect sensor operation. The method of secondary confirmation by human observation is labor-intensive and time-consuming, and relies on human physical and mental health, resulting in considerable uncertainty in the results. These two technical solutions do not meet the requirements for power safety monitoring.

[0005] Therefore, there is an urgent need for a visual recognition device and system for the open and closed status of the GIS knife switch body, which is not affected by mechanical wear and aging, and can perform real-time visual analysis without relying on personnel. Utility Model Content

[0006] To solve the above problems, the present invention provides a device and system for visually identifying the open and closed status of a GIS knife switch. The device collects images of the GIS knife switch through a video sensor, visually analyzes the switch status in real time, displays a warning light, and provides feedback on the output status of the IO dry contact. The present invention uses a non-contact method for collection and identification, is not affected by mechanical wear and aging, and provides real-time visual analysis without relying on personnel.

[0007] The technical solution adopted by the utility model is: the utility model provides a visual recognition device for the opening and closing state of the GIS knife switch body, including an analog video distribution module, an analog video to digital video conversion module, an image recognition module, an IO dry contact output module, a warning light serial port communication module, a warning light control module and multiple external interfaces. The external interface includes a 3-way analog video BNC interface and 6 dry contact output ports. The 3-way analog video BNC interface corresponds to the GIS knife switch body A, B and C three-phase analog video respectively, and the 6 dry contact output ports correspond to the GIS knife switch A phase opening and closing nodes, B phase opening and closing nodes respectively. The switch and closing nodes and the C-phase opening and closing nodes are connected. The analog video distribution module is connected to the analog video to digital module, the analog video to digital video module is connected to the image recognition module, the image recognition module is connected to the 6 dry contacts via the IO dry contact output module, the analog video distribution module is used to connect to the analog video sensor via the 3-way analog video BNC interface, the image recognition module is connected to the warning light control module via the warning light serial port communication module, the warning light control module is used to connect multiple warning lights, and the multiple warning lights are used to indicate the states of the A, B, and C phases being in the closed position, not in the closed position, in the open position, and not in the open position;

[0008] The analog video distribution module receives the knife switch image captured by the analog video sensor, and the knife switch image is transmitted to the analog video to digital video module for analog-to-digital conversion, and the converted digital video is output to the image recognition module. The image recognition module determines whether phase A, phase B and phase C are open or closed, and outputs the corresponding electrical signal to the IO dry contact output module. The output state of the corresponding dry contact connected to the IO dry contact output module is switched to open or closed, and the corresponding warning light connected to the warning light control module indicates the corresponding state.

[0009] Furthermore, in order to avoid unexpected risks and improve safety, the IO dry contact output module is used to connect to the measurement and control device of the power station. The measurement and control device is responsible for collecting the switch status and operation data of the circuit breaker and the disconnector. When the image recognition module determines that the opening or closing of phase A, phase B and phase C is abnormal, the IO dry contact output module connected to it outputs a locking signal to the measurement and control device of the power station, and the measurement and control device feeds back to the one-button sequential control system. The one-button sequential control system sends an alarm signal when it detects an abnormal situation.

[0010] Furthermore, it also includes a picture synthesis output module, which is connected to the analog video distribution module. The picture synthesis output module is used to connect to the digital hard disk recorder. The analog video distribution module distributes and outputs the A-phase, B-phase and C-phase analog videos to the picture synthesis output module to synthesize one channel of video, which is output to the digital hard disk recorder through the BNC interface via the picture synthesis output module. The digital hard disk recorder stores the GIS knife switch video.

[0011] Furthermore, it also includes a network communication module, which is used to access the power station local area network. The background management software deployed in the control room can maintain and monitor the visual recognition device of the opening and closing status of the GIS knife switch body.

[0012] The states corresponding to multiple dry contacts and warning lights are as follows: when the image recognition module recognizes that the opening switch is in place, the opening warning light displays green, the opening dry contact output remains unchanged, that is, the default normally closed state, and the closing dry contact output state is disconnected; if the opening switch is not in place, the opening warning light turns red to remind the operating user, the opening dry contact output switches from normally closed to disconnected output, and the closing dry contact output state is disconnected; when the user completes the maintenance, the user closes the GIS knife switch, and if the GIS knife switch body opening and closing state visual recognition device recognizes that the closing switch is in place, the closing warning light displays green. When it recognizes that the closing switch is not in place, the closing warning light turns yellow to remind the operating user, the closing dry contact output state is open circuit, and the opening dry contact output is open circuit.

[0013] The utility model also includes a GIS knife switch body opening and closing state visual recognition system, including the above-mentioned GIS knife switch body opening and closing state visual recognition device, and also includes an analog video sensor, a power supply control device and a digital hard disk recorder. The analog video sensor is used to be connected to the knife switch body and connected to the GIS knife switch body opening and closing state visual recognition device. The GIS knife switch body opening and closing state visual recognition device is connected to the digital hard disk recorder and the power supply control device.

[0014] The analog video sensor captures images of the GIS knife switch and transmits the captured images to the GIS knife switch body opening and closing state visual recognition device. The GIS knife switch body opening and closing state visual recognition device determines whether phases A, B and C are open or closed, and its dry contact output state is switched to open or closed. The warning light indicates the corresponding state. The GIS knife switch body opening and closing state visual recognition device outputs images to the digital hard disk recorder, which is used to store the images. The power control device is used to supply power to the GIS knife switch body opening and closing state visual recognition device.

[0015] Furthermore, an analog video sensor is installed at the observation hole of the GIS knife switch, a visual identification device for the open and closed state of the GIS knife switch body is installed on a bridge near the GIS knife switch, a warning light of the visual identification device for the open and closed state of the GIS knife switch body is installed near the observation hole of the GIS knife switch, and the power control device and the digital hard disk recorder are installed inside the panel cabinet or terminal box.

[0016] The beneficial effects of the present invention are as follows: the present invention realizes non-contact real-time monitoring of the on-off state of the knife switch body, and reminds the operating user of whether the switching is normal or abnormal by means of a warning light, which can save a lot of operation and maintenance time and improve work efficiency and safety. The present invention collects and identifies data in a non-contact manner, is not affected by mechanical wear and aging, and performs real-time visual analysis without relying on personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a visual recognition device for the open and closed states of a GIS knife switch body in Example 1 of the utility model.

[0018] Figure 2 This is a structural block diagram of a visual recognition system for the open and closed states of a GIS knife switch body in Example 2 of the utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and a preferred embodiment. Example 1

[0020] refer to Figure 1, this embodiment provides a GIS knife switch body opening and closing state visual recognition device, including an analog video distribution module, a picture synthesis output module, an analog video to digital video module, an image recognition module, an IO dry contact output module, a network communication module, a warning light serial communication module, a warning light control module and multiple external interfaces, the external interface includes a 3-way analog video BNC interface and 6 dry contact output ports, the 3-way analog video BNC interface corresponds to the GIS knife switch body A, B and C three-phase analog video respectively, the 6 dry contact output ports correspond to the GIS knife switch A phase opening and closing node, the B phase opening and closing node and the C phase opening and closing node respectively, the 6 dry contact output ports are specifically A phase opening dry node, A phase closing dry node, B phase opening dry node, B phase closing dry node, C phase opening dry node and C phase closing dry node, the analog video to digital video module and The image recognition module is connected, and the image recognition module is connected to 6 dry contacts through the IO dry contact output module. The analog video distribution module is used to connect the analog video sensor through the 3-way analog video BNC interface. The image recognition module is connected to the warning light serial port communication module and the warning light control module. The warning light control module is used to connect 6 warning lights. The warning light is specifically a three-color warning light, showing red, green and yellow. The 6 warning lights are used to indicate the status of the A, B and C phases in the closed position, the closed position not in place, the open position in place and the open position not in place. The 6 warning lights are specifically A phase knife switch open indication, A phase knife switch closed indication, B phase knife switch open indication, B phase knife switch closed indication, C phase knife switch open indication and C phase knife switch closed indication. The picture synthesis output module is connected to the analog video distribution module. The picture synthesis output module is used to connect to the digital hard disk recorder. The network communication module is used to access the power station local area network.

[0021] The analog video to digital video module performs analog-to-digital conversion on the knife switch image captured by the analog video sensor, and outputs the converted digital video to the image recognition module. The image recognition module determines whether phase A, phase B and phase C are open or closed, and outputs the corresponding electrical signal to the IO dry contact output module. The output status of the corresponding dry contact connected to the IO dry contact output module is switched to open or closed, and the corresponding warning light connected to the warning light control module indicates the corresponding status.

[0022] The IO dry contact output module is used to connect to the power station's measurement and control device. The measurement and control device is responsible for collecting the switch status and operating data of the circuit breaker and disconnector. When the image recognition module determines that the opening or closing of phase A, phase B, and phase C is abnormal, the IO dry contact output module connected to it outputs a locking signal to the power station's measurement and control device. The measurement and control device then feeds back to the one-button sequential control system. When the one-button sequential control system detects an abnormal situation, it issues an alarm signal to remind the operator to deal with the abnormality in a timely manner to ensure safe system operation.

[0023] The analog video distribution module converts the three channels of analog video into one channel through the picture synthesis output module and outputs it to the digital hard disk recorder. The digital hard disk recorder stores the GIS knife switch video. Through the network communication module, the background management software deployed in the control room can maintain and monitor the visual recognition device of the opening and closing status of the GIS knife switch body.

[0024] Specifically, the states corresponding to the multiple dry contacts and warning lights are: when the image recognition module recognizes that the opening switch is in place, the knife switch opening indication warning light shows green, the opening switch dry contact output remains unchanged, that is, the default normally closed state, and the closing switch dry contact output state is disconnected; if the opening switch is not in place, the knife switch opening indication warning light turns red to remind the operating user, the opening switch dry contact output switches from normally closed to disconnected output, and the closing switch dry contact output state is disconnected, and the IO dry contact output module feeds back the state to the measurement and control device; when the user completes the maintenance, the user closes the GIS knife switch, and if the GIS knife switch body opening and closing state visual recognition device recognizes that the closing switch is in place, the knife switch closing indication warning light shows green. When it recognizes that the closing switch is not in place, the knife switch closing indication warning light turns yellow to remind the operating user, the closing switch dry contact output state is open circuit, the opening switch dry contact output is open circuit, and the IO dry contact output module feeds back the state to the measurement and control device.

[0025] Specifically, the image recognition module can adopt the opening and closing detection method described in the prior art CN111209958B, which specifically includes S1: collecting multiple images containing the physical opening and closing positions of substation equipment, marking target boxes with different labels for the equipment category and opening and closing positions of the images, uniformly cropping and preprocessing the marked images to make a standard data set, and dividing the data set into a training set, a validation set and a test set in proportion; S2: loading the training set and the pre-trained model parameters into the substation equipment detection neural network model, and using the deep learning-based py faster rcnn deep convolutional network for training to obtain the trained substation equipment detection neural network model; S3: using the validation set to verify the trained substation equipment detection neural network model, and iteratively optimizing the substation equipment detection neural network model according to the verification results to obtain the final substation equipment detection neural network model; S4: using the test set to test the substation equipment detection neural network model to obtain the equipment category and physical opening and closing position recognition results of the substation equipment. It can efficiently and automatically detect the type of substation equipment and the physical opening and closing status. During the test, the image to be detected is input into the algorithm for recognition, and the recognition results of the equipment type, equipment location and opening and closing position can be directly obtained with high recognition accuracy. Example 2

[0026] .refer to Figure 2This embodiment provides a GIS knife switch body opening and closing state visual recognition system, including the GIS knife switch body opening and closing state visual recognition device described in Example 1, and also including an analog video sensor, a power supply control device, a digital hard disk recorder and a one-button sequential control system. The analog video sensor is installed at the observation hole of the GIS knife switch. The analog video sensor is used to connect to the knife switch body and is connected to the GIS knife switch body opening and closing state visual recognition device through a coaxial cable. The GIS knife switch body opening and closing state visual recognition device is connected to the digital hard disk recorder through a coaxial cable. The power line of the GIS knife switch opening and closing state recognition device and the power line of the analog video sensor are connected to the power supply control device. The GIS knife switch body opening and closing state visual recognition device is installed on a bridge near the GIS knife switch. The warning light of the GIS knife switch body opening and closing state visual recognition device is installed near the GIS knife switch observation hole. The serial port of the GIS knife switch body opening and closing state recognition device is connected to the warning light installed near the GIS observation hole. The power supply control device and the digital hard disk recorder are installed inside a panel cabinet or a terminal box. The measurement and control device is connected to the GIS knife switch body opening and closing state visual recognition device. The output dry node of the GIS knife switch opening and closing state recognition device is connected to the measurement and control device through a signal line.

[0027] The working process of the utility model is as follows: the analog video sensor, the GIS knife switch body opening and closing state visual recognition device and the warning light are in the power-off state by default. Before maintenance, the user first powers on the above-mentioned equipment through the power control device. After the equipment is powered on, the image recognition module of the GIS knife switch body opening and closing state visual recognition device enters the image acquisition and image analysis stage, and the digital hard disk recorder starts video recording at the same time; the user operates the GIS knife switch body to open the switch, and the GIS knife switch body opening and closing state visual recognition device analyzes and recognizes the image. If the switch is opened, the opening warning light will display green, the opening dry contact output will remain unchanged, that is, the default normally closed state, and the closing dry contact output state will be disconnected; If the opening switch is not in place, the opening warning light will turn red to remind the operating user, the opening dry contact output will switch from normally closed to disconnected output, and the closing dry contact output will be disconnected, which will be fed back to the one-button sequential control system; when the user has completed the maintenance, the user will close the GIS knife switch. If the GIS knife switch body opening and closing status visual recognition device recognizes that the closing switch is in place, the closing warning light will be green. If it recognizes that the closing switch is not in place, the closing warning light will be yellow to remind the operating user, the closing dry contact output will be open circuit, and the opening dry contact output will be open circuit, and the status will be fed back to the one-button sequential control system; finally, the user will power off the analog video sensor, the GIS knife switch opening and closing status recognition device and the warning light.

[0028] The utility model realizes non-contact real-time monitoring of the on-off status of the knife switch body, and reminds the operating user by means of a warning light whether the switching is normal or abnormal, which can save a lot of operation and maintenance time and improve work efficiency and safety. The utility model collects and identifies information in a non-contact manner, is not affected by mechanical wear and aging, and performs real-time visual analysis without relying on personnel.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also within the scope of protection of the present invention.

Claims

1. A visual recognition device for the open and closed state of a GIS switch, characterized in that: It includes an analog video distribution module, an analog video to digital video module, an image recognition module, an IO dry contact output module, a warning light serial port communication module, a warning light control module and multiple external interfaces. The external interfaces include 3-way analog video BNC interfaces and 6 dry contact output ports. The 3-way analog video BNC interfaces correspond to the three-phase analog videos of the GIS knife switch body A, B and C respectively. The 6 dry contact output ports correspond to the opening and closing nodes of phase A of the GIS knife switch, the opening and closing nodes of phase B, and the opening and closing nodes of phase C. The analog video distribution module is connected to the analog video to digital module, and the analog video to digital video module is connected to the image recognition module. The image recognition module is connected to the IO dry contact output module and the 6 dry contacts. The analog video distribution module is used to connect to the analog video sensor through the 3-way analog video BNC interface. The image recognition module is connected to the warning light serial port communication module and the warning light control module. The warning light control module is used to connect multiple warning lights. The multiple warning lights are used to indicate the states of the A, B and C phases being closed in place, not closed in place, opening in place and not opening in place; The analog video distribution module receives the knife switch image captured by the analog video sensor, and the knife switch image is transmitted to the analog video to digital video module for analog-to-digital conversion, and the converted digital video is output to the image recognition module. The image recognition module determines whether phase A, phase B and phase C are open or closed, and outputs the corresponding electrical signal to the IO dry contact output module. The output state of the corresponding dry contact connected to the IO dry contact output module is switched to open or closed, and the corresponding warning light connected to the warning light control module indicates the corresponding state.

2. A GIS switch body open / close state visual recognition device according to claim 1, characterized in that: The IO dry contact output module is used to connect to the power station's measurement and control device. The measurement and control device is responsible for collecting the switch status and operating data of the circuit breaker and disconnector. When the image recognition module determines that the opening or closing of phase A, phase B, and phase C is abnormal, the IO dry contact output module connected to it outputs a locking signal to the power station's measurement and control device. The measurement and control device then feeds back to the one-button sequential control system, which issues an alarm signal when it detects an abnormal situation.

3. The GIS switch body open / close state visual recognition device according to claim 1 is characterized in that: It also includes a picture synthesis output module, which is connected to the analog video distribution module. The picture synthesis output module is used to connect to the digital hard disk recorder. The analog video distribution module distributes the A-phase, B-phase and C-phase analog videos to the picture synthesis output module to synthesize one channel of video, which is output to the digital hard disk recorder through the BNC interface via the picture synthesis output module. The digital hard disk recorder stores the GIS knife switch video.

4. The GIS switch body open / close state visual recognition device according to claim 1 is characterized in that: It also includes a network communication module, which is used to access the power station local area network. The background management software deployed in the control room can maintain and monitor the visual recognition device of the GIS knife switch body's opening and closing status.

5. The GIS switch body open / close state visual recognition device according to claim 1 is characterized in that: The states corresponding to multiple dry contacts and warning lights are as follows: when the image recognition module recognizes that the opening switch is in place, the opening warning light displays green, the opening dry contact output remains unchanged, that is, the default normally closed state, and the closing dry contact output state is disconnected; if the opening switch is not in place, the opening warning light turns red to remind the operating user, the opening dry contact output switches from normally closed to disconnected output, and the closing dry contact output state is disconnected; when the user completes the maintenance, the user closes the GIS knife switch, and if the GIS knife switch body opening and closing state visual recognition device recognizes that the closing switch is in place, the closing warning light displays green. When it recognizes that the closing switch is not in place, the closing warning light turns yellow to remind the operating user, the closing dry contact output state is open circuit, and the opening dry contact output is open circuit.

6. A GIS switch body open and close state visual recognition system, characterized by: The device comprises the GIS switch body opening and closing state visual recognition device as described in claim 1, and further comprises an analog video sensor, a power supply control device, and a digital hard disk recorder, wherein the analog video sensor is connected to the switch body and to the GIS switch body opening and closing state visual recognition device, and the GIS switch body opening and closing state visual recognition device is connected to the digital hard disk recorder and the power supply control device; The analog video sensor captures images of the GIS knife switch and transmits the captured images to the GIS knife switch body opening and closing state visual recognition device. The GIS knife switch body opening and closing state visual recognition device determines whether phase A, phase B and phase C are open or closed, and its dry contact output state is switched to open or closed. The warning light indicates the corresponding state. The GIS knife switch body opening and closing state visual recognition device outputs the image GIS video to the digital hard disk recorder. The digital hard disk recorder is used to store the image, and the power control device is used to power the GIS knife switch body opening and closing state visual recognition device.

7. A GIS switch body open / close state visual recognition system according to claim 6, characterized in that: The analog video sensor is installed at the observation hole of the GIS knife switch. The visual identification device for the opening and closing status of the GIS knife switch body is installed on the bridge near the GIS knife switch. The warning light of the visual identification device for the opening and closing status of the GIS knife switch body is installed near the observation hole of the GIS knife switch. The power control device and the digital hard disk recorder are installed inside the panel cabinet or terminal box.

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