Converter station sequence control method based on dual confirmation of auxiliary nodes and video images

Abstract

The present application relates to a converter station sequence control method based on dual confirmation of auxiliary nodes and video images. The method includes: when each switch and knife switch corresponding to the converter station equipment controlled by the converter station sequence control system performs a splitting and closing operation matching the equipment state of the current sequence, the auxiliary node displacement signal corresponding to each switch and knife switch is obtained through the converter station system; the video image information of each switch and knife switch is analyzed by the master station system to determine the second splitting and closing state of each switch and knife switch, and the second splitting and closing state is sent to the converter station system; when the converter station system determines that both the first splitting and closing state and the second splitting and closing state meet the target state, each switch and knife switch corresponding to the converter station equipment is allowed to perform a splitting and closing operation matching the equipment state of the next sequence. The use of this method can improve the accuracy of the converter station sequence control.

Description

Technical Field

[0001] The present application relates to the field of power electronics technology, and in particular to a method, device, computer equipment, computer-readable storage medium and computer program product for sequential control of a converter station based on dual confirmation of an auxiliary node and a video image. Background Art

[0002] In DC transmission projects, converter stations are equipped with a large number of switches and circuit breakers, which can be used to achieve the state conversion of converters, busbars, lines and other equipment in the converter station. The DC control system can operate the switches and circuit breakers in sequence according to the preset sequence, and automatically complete the state conversion of maintenance, cold standby, hot standby, operation and other equipment.

[0003] At present, the sequential control process of the converter station detects through sensors that the on / off state of the preceding switch meets the target state, and then sequentially controls the on / off state of the succeeding switch. However, due to sensor abnormalities, the state conversion of the succeeding switch is executed before the on / off state of the preceding switch is actually converted, resulting in low accuracy of the sequential control of the converter station. Summary of the invention

[0004] Based on this, it is necessary to provide a converter station sequence control method, device, computer equipment, computer readable storage medium and computer program product based on dual confirmation of auxiliary nodes and video images, which can improve the accuracy of converter station sequence control in order to solve the above technical problems.

[0005] In a first aspect, the present application provides a converter station sequence control method based on dual confirmation of an auxiliary node and a video image, which is applied to a converter station sequence control system, wherein the converter station sequence control system includes a converter station system and a master station system, and the method includes:

[0006] When the switches and circuit breakers corresponding to the converter station equipment controlled by the converter station sequence control system perform opening and closing operations matching the equipment state of the current sequence, the auxiliary node position change signals corresponding to the switches and circuit breakers are obtained through the converter station system; the auxiliary node position change signals include the first opening and closing states obtained by the auxiliary node detection of the switches and circuit breakers;

[0007] The master station system analyzes the video image information of each switch and knife switch to determine the second opening and closing state of each switch and knife switch, and sends the second opening and closing state to the converter station system;

[0008] When the converter station system determines that both the first opening and closing state and the second opening and closing state meet the target state, the switches and circuit breakers corresponding to the converter station equipment are allowed to perform opening and closing operations matching the equipment state of the next sequence.

[0009] In one embodiment, the converter station system includes a converter station DC monitoring subsystem and a converter station video monitoring subsystem; the master station system includes a master station monitoring subsystem and a master station analysis subsystem; and the method further includes:

[0010] Sending a telesignal signal and an auxiliary node position change signal of any of the switches and knife switches to the master station monitoring subsystem through the converter station DC monitoring subsystem; the telesignal signal includes a target opening and closing state of each of the switches and knife switches; the target opening and closing state is an opening and closing state that matches the device state of the current sequence;

[0011] When the master station monitoring subsystem determines that the first opening and closing state indicated by the auxiliary node position change signal of any of the switches and knife switches matches the target opening and closing state corresponding to any of the switches and knife switches, the video image acquisition instruction for any of the switches and knife switches is sent to the converter station video monitoring subsystem;

[0012] Among them, the video image acquisition instruction is used to instruct the converter station video monitoring subsystem to control the camera to capture the video image information of any of the switches and knife switches, and send the video image information to the main station analysis subsystem, so that the main station analysis subsystem can analyze the video image information of any of the switches and knife switches to obtain the second open and close state of any of the switches and knife switches.

[0013] In one embodiment, the method further comprises:

[0014] The converter station video monitoring subsystem controls the camera to capture the video image information of any of the switches and knife switches according to the video image acquisition instructions, and sends the video image information to the main station analysis subsystem through a dedicated data line, so that the main station analysis subsystem can analyze the video image information of any of the switches and knife switches.

[0015] In one embodiment, analyzing the video image information of each switch and knife switch by the master station system to determine the second open / close state of each switch and knife switch includes:

[0016] The main station analysis subsystem extracts features from the video image information of each switch and knife switch to obtain state features of each switch and knife switch, and determines the second open and close state of each switch and knife switch based on the state features; the state features include the position, angle, and contour of the handle or contact of the switch or knife switch in the video image information.

[0017] In one embodiment, the converter station system further includes a telecontrol device, which is used for remote signal transmission; the sending of the telesignaling signal and the auxiliary node position change signal of any switch or knife switch to the master station monitoring subsystem through the converter station DC monitoring subsystem includes:

[0018] The remote signal and the auxiliary node position change signal of any switch or knife switch are sent to the master station monitoring subsystem through the converter station DC monitoring subsystem via the remote control device and the dedicated area data network.

[0019] In one embodiment, the master station system includes a master station monitoring subsystem, a master station analysis subsystem and an isolation device; the isolation device is used to isolate the data transmission channel between the master station monitoring subsystem and the master station analysis subsystem from unauthorized data access or an unsafe network; the master station system analyzes the video image information of each switch and knife switch to determine the second opening and closing state of each switch and knife switch, and sends the second opening and closing state to the converter station system, including:

[0020] The main station analysis subsystem analyzes the video image information of each switch and knife switch to determine the second opening and closing state of each switch and knife switch, and sends the second opening and closing state to the main station monitoring subsystem through the isolation device;

[0021] The second opening and closing state is sent to the converter station system through the master station monitoring subsystem.

[0022] In a second aspect, the present application further provides a converter station sequence control device based on dual confirmation of auxiliary nodes and video images, which is applied to a converter station sequence control system, wherein the converter station sequence control system includes a converter station system and a master station system, and the device includes:

[0023] The converter station module is used for obtaining auxiliary node position change signals respectively corresponding to the switches and knife switches through the converter station system when the switches and knife switches corresponding to the converter station equipment controlled by the converter station sequence control system perform opening and closing operations matching the equipment state of the current sequence; the auxiliary node position change signals include the first opening and closing state obtained by the auxiliary node detection of the switches and knife switches;

[0024] A master station module, used for analyzing the video image information of each switch and knife switch through the master station system, determining the second opening and closing state of each switch and knife switch, and sending the second opening and closing state to the converter station system;

[0025] The converter station module is also used to allow the switches and circuit breakers corresponding to the converter station equipment to perform opening and closing operations matching the equipment state of the next sequence when it is determined through the converter station system that the first opening and closing state and the second opening and closing state both meet the target state.

[0026] In a third aspect, the present application further provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0027] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the above method when executed by a processor.

[0028] In a fifth aspect, the present application also provides a computer program product, including a computer program, which implements the steps of the above method when executed by a processor.

[0029] The above-mentioned converter station sequence control method, device, computer equipment, computer-readable storage medium and computer program product based on dual confirmation of auxiliary nodes and video images are applied to a converter station sequence control system, which includes a converter station system and a master station system; when each switch and knife switch corresponding to the converter station equipment controlled by the converter station sequence control system performs an opening and closing operation matching the equipment state of the current sequence, the converter station system obtains the auxiliary node position change signal corresponding to each switch and knife switch, and the auxiliary node position change signal includes the first opening and closing state obtained by the auxiliary node detection of the switch and knife switch; the master station system analyzes the video image information of each switch and knife switch to determine the second opening and closing state of each switch and knife switch, and sends the second opening and closing state to the converter station system; when the converter station system determines that the first opening and closing state and the second opening and closing state both meet the target state, the converter station system allows each switch and knife switch corresponding to the converter station equipment to perform an opening and closing operation matching the equipment state of the next sequence. The first opening and closing states of switches and circuit breakers are obtained through the converter station system, and combined with the analysis of video image information by the main station system, it is ensured that the state conversion of subsequent equipment is allowed only after the state of the preceding equipment is accurately converted, thereby greatly reducing the risk of misoperation. By introducing a dual confirmation mechanism of auxiliary node position change signals and video images, the converter station sequential control method effectively improves the accuracy and reliability of switch and circuit breaker state judgment during the sequential control process, avoids sequential control errors caused by single sensor failure or misjudgment, improves the safety and stability of the converter station sequential control system during equipment state switching, and improves the accuracy of the converter station sequential control. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] FIG1 is an application environment diagram of a converter station sequence control method based on dual confirmation of auxiliary nodes and video images in one embodiment;

[0032] FIG2 is a flow chart of a converter station sequence control method based on dual confirmation of auxiliary nodes and video images in one embodiment;

[0033] FIG3 is a logic diagram of a converter station sequence control method based on dual confirmation of auxiliary nodes and video images in one embodiment;

[0034] FIG4 is a flow chart of a converter station sequence control method based on dual confirmation of auxiliary nodes and video images in another embodiment;

[0035] FIG5 is a structural block diagram of a converter station sequence control device based on dual confirmation of auxiliary nodes and video images in one embodiment;

[0036] FIG. 6 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0038] The converter station sequence control method based on dual confirmation of auxiliary nodes and video images provided in the embodiment of the present application can be applied in the application environment shown in FIG1 . The converter station sequence control system 102 includes a converter station system 104 and a master station system 106 .

[0039] The converter station sequence control system 102 may be a system for managing and controlling the state transition of equipment in the converter station, including a converter station system 104 and a master station system 106. The converter station sequence control system 102 realizes the state transition of converter station equipment (such as converters, busbars, lines, etc.), such as maintenance, cold standby, hot standby, operation, etc., by sequentially controlling the opening and closing operations of switches and circuit breakers.

[0040] The converter station system 104 may include devices for controlling converter station equipment (such as control systems, sensors, communication devices, etc.), and may also include converter station equipment itself (such as converters, busbars, lines, etc.). The converter station system 104 may be used to collect and process auxiliary node position change signals of switches and circuit breakers, and execute control commands issued by the master station system 106.

[0041] The master station system 106 may be located in a power dispatching center or a power control center, and may be used to perform data interaction with the converter station system 104, such as sending control instructions and receiving status feedback. The master station system 106 may determine the actual opening and closing states of switches and circuit breakers through video image information analysis, and send the analysis results of the video image information to the converter station system 104.

[0042] The converter station sequential control system 102 is used to sequentially control the equipment status of the converter station equipment, and the equipment status of the converter station equipment is determined according to the opening and closing status of each switch and knife switch corresponding to the converter station equipment. Among them, the equipment status may include the working mode or operation status of each device in the converter station, such as maintenance, cold standby, hot standby, operation, etc. The change of the equipment status is achieved by performing specific opening and closing operations on the relevant switches and knife switches.

[0043] Among them, the on and off states of switches and circuit breakers can be the operating states of switches and circuit breakers in the converter station, namely "on" (closed) and "off" (open). These on and off states directly affect the overall working state of the converter station equipment and are the basis for equipment state conversion.

[0044] When the switches and circuit breakers corresponding to the converter station equipment controlled by the converter station sequence control system perform opening and closing operations that match the equipment status of the current sequence, the converter station system 104 obtains the auxiliary node position change signals corresponding to the switches and circuit breakers respectively; the auxiliary node position change signals include the first opening and closing states obtained by the auxiliary node detection of the switches and circuit breakers; the main station system 106 analyzes the video image information of the switches and circuit breakers to determine the second opening and closing states of the switches and circuit breakers, and sends the second opening and closing states to the converter station system 104; when the converter station system 104 determines that both the first opening and closing states and the second opening and closing states meet the target states, the switches and circuit breakers corresponding to the converter station equipment are allowed to perform opening and closing operations that match the equipment status of the next sequence.

[0045] In an exemplary embodiment, as shown in FIG2 , a converter station sequence control method based on dual confirmation of an auxiliary node and a video image is provided. The method is described by taking the converter station sequence control system 102 in FIG1 as an example. The method is applied to the converter station sequence control system, which includes a converter station system and a master station system. The method includes:

[0046] Step S202, when each switch and circuit breaker corresponding to the converter station equipment controlled by the converter station sequence control system performs an opening and closing operation matching the equipment state of the current sequence, the auxiliary node position change signal corresponding to each switch and circuit breaker is obtained through the converter station system.

[0047] The auxiliary node position change signal includes a first opening and closing state detected by the auxiliary node of the switch or knife switch. The first opening and closing state is a physical operation state of the switch or knife switch detected by the auxiliary node sensor of the switch or knife switch.

[0048] Among them, the auxiliary node can be a sensor or detection device installed on the switch or knife switch, which is used to monitor the physical operation state (such as the opening and closing state) of the switch or knife switch, can provide real-time status feedback, and generate a signal to indicate whether the switch or knife switch has correctly performed the expected operation. The signal generated by the auxiliary node is the auxiliary node displacement signal. The auxiliary node displacement signal can be detected by an auxiliary sensor installed on the switch or knife switch, reflecting the physical opening and closing state of the switch or knife switch, that is, the first opening and closing state in this application.

[0049] In practical applications, for any converter station equipment, its equipment state can be controlled sequentially, and the equipment state can be determined according to the combination of the opening and closing states of the switches and circuit breakers corresponding to the converter station equipment. For example, the equipment state of sequential control can be in the order of maintenance, cold standby, hot standby, and operation. If the equipment state of the current sequence is maintenance, then each switch and circuit breaker needs to perform the opening and closing operation that matches the equipment state of the current sequence (i.e., maintenance state), so as to realize the conversion of the equipment state of the converter station equipment to the maintenance state.

[0050] In the specific implementation, the converter station system obtains the auxiliary node position change signals corresponding to each switch and knife switch, which can be signals sent by the auxiliary nodes corresponding to each switch and knife switch for feedback of the switch and knife switch opening and closing status, that is, receiving the auxiliary node position change signals sent by the auxiliary nodes corresponding to each switch and knife switch.

[0051] Step S204: The master station system analyzes the video image information of each switch and knife switch to determine the second opening and closing state of each switch and knife switch, and sends the second opening and closing state to the converter station system.

[0052] The video image information may be video or image information of switches and knife switches captured by a camera and obtained by the master station system. The master station system may perform frame-by-frame image analysis on the switch and knife switch videos captured by the camera. The image may be analyzed by visual features in the image, such as the physical position of the switch and knife switch, indication marks and other visual features, to determine whether the switch and knife switch are in a closed state or an open state.

[0053] The second open / close state is the physical operating state of the switch or knife switch determined by analyzing the video image information of the switch or knife switch.

[0054] Step S206, when the converter station system determines that both the first opening and closing state and the second opening and closing state meet the target state, the switches and circuit breakers corresponding to the converter station equipment are allowed to perform opening and closing operations matching the equipment state of the next sequence.

[0055] Among them, the target state can be the expected state preset by the converter station system, or it can be a specific state that the switch and knife switch are required to reach in a certain sequence of operations, such as switch A needs to be closed and switch B needs to be opened.

[0056] When the converter station system determines that the first opening and closing states and the second opening and closing states of each switch and circuit breaker meet the target state, it can confirm that the conversion of the equipment state of the current sequence of the converter station equipment has been completed, and can allow each switch and circuit breaker corresponding to the converter station equipment to perform the opening and closing operation matching the equipment state of the next sequence, that is, to convert the equipment state of the next sequence, such as from the maintenance state to the cold standby state.

[0057] The converter station system allows the switches and circuit breakers corresponding to the converter station equipment to perform opening and closing operations that match the equipment status of the next sequence. It can send a confirmation message to the controller of the converter station equipment. When the controller receives the confirmation message, it controls the switches and circuit breakers corresponding to the converter station equipment to perform opening and closing operations that match the equipment status of the next sequence.

[0058] In the above technical scheme, the converter station system allows the switches and knife switches corresponding to the converter station equipment to perform opening and closing operations matching the equipment state of the next sequence only when it is determined that the first opening and closing states and the second opening and closing states of the switches and knife switches meet the target state. Since the auxiliary nodes of the switches and knife switches may be abnormal, it may happen that the switches and knife switches of the previous sequence are not actually operated before the switches and knife switches of the subsequent sequence are operated by relying solely on the auxiliary node position change signals. Therefore, the first opening and closing state determined by the auxiliary node position change signals and the second opening and closing state determined by the video image information can improve the accuracy of the sequential control of the converter station.

[0059] The above-mentioned converter station sequence control method based on dual confirmation of auxiliary nodes and video images is applied to a converter station sequence control system, which includes a converter station system and a master station system; the converter station sequence control system is used to sequentially control the equipment status of the converter station equipment, and the equipment status of the converter station equipment is determined according to the opening and closing status of each switch and knife switch corresponding to the converter station equipment; when each switch and knife switch corresponding to the converter station equipment controlled by the converter station sequence control system performs an opening and closing operation matching the equipment status of the current sequence, the converter station system obtains auxiliary node position change signals corresponding to each switch and knife switch, and the auxiliary node position change signals include the first opening and closing status obtained by the auxiliary node detection of the switch and knife switch; the master station system analyzes the video image information of each switch and knife switch to determine the second opening and closing status of each switch and knife switch, and sends the second opening and closing status to the converter station system; when the converter station system determines that both the first opening and closing status and the second opening and closing status meet the target status, the converter station system allows each switch and knife switch corresponding to the converter station equipment to perform an opening and closing operation matching the equipment status of the next sequence. The first opening and closing states of switches and circuit breakers are obtained through the converter station system, and combined with the analysis of video image information by the main station system, it is ensured that the state conversion of subsequent equipment is allowed only after the state of the preceding equipment is accurately converted, thereby greatly reducing the risk of misoperation. By introducing a dual confirmation mechanism of auxiliary node position change signals and video images, the converter station sequential control method effectively improves the accuracy and reliability of switch and circuit breaker state judgment during the sequential control process, avoids sequential control errors caused by single sensor failure or misjudgment, improves the safety and stability of the converter station sequential control system during equipment state switching, and improves the accuracy of the converter station sequential control.

[0060] In another embodiment, the converter station system includes a converter station DC monitoring subsystem and a converter station video monitoring subsystem; the master station system includes a master station monitoring subsystem and a master station analysis subsystem; and further includes: sending a telesignal signal and an auxiliary node position change signal of any switch or knife switch to the master station monitoring subsystem through the converter station DC monitoring subsystem; the telesignal signal includes a target opening and closing state of each switch or knife switch; when the master station monitoring subsystem determines that the first opening and closing state indicated by the auxiliary node position change signal of any switch or knife switch matches the target opening and closing state corresponding to any switch or knife switch, sending a video image acquisition instruction for any switch or knife switch to the converter station video monitoring subsystem; wherein the video image acquisition instruction is used to instruct the converter station video monitoring subsystem to control a camera to capture video image information of any switch or knife switch, and send the video image information to the master station analysis subsystem, so as to obtain the second opening and closing state of any switch or knife switch by analyzing the video image information of any switch or knife switch through the master station analysis subsystem.

[0061] Among them, the converter station video monitoring subsystem can be used to control the camera to capture real-time video images of the switches and circuit breakers of the converter station equipment, and send these images to the main station system for analysis.

[0062] Among them, the converter station DC monitoring subsystem can be used to monitor and control the status of converter station equipment, and send remote signaling signals and auxiliary node position change signals to the main station monitoring subsystem.

[0063] The converter station DC monitoring subsystem can also be used to allow the switches and circuit breakers corresponding to the converter station equipment to perform opening and closing operations matching the next sequence of equipment states when it is determined that the first opening and closing states and the second opening and closing states of the switches and circuit breakers meet the target states.

[0064] In one of the embodiments, when the converter station system determines that both the first opening and closing state and the second opening and closing state meet the target state, allowing each switch and knife switch corresponding to the converter station equipment to perform an opening and closing operation matching the equipment state of the next sequence may include: when the converter station DC monitoring subsystem determines that both the first opening and closing state and the second opening and closing state meet the target state, allowing each switch and knife switch corresponding to the converter station equipment to perform an opening and closing operation matching the equipment state of the next sequence.

[0065] Among them, the main station monitoring subsystem can be used to receive and analyze the auxiliary node position change signal, and send video image acquisition instructions to the converter station video monitoring subsystem according to the analysis results.

[0066] Among them, the main station analysis subsystem can be used to analyze video image information.

[0067] Among them, the telesignaling signal may refer to a signal transmitted remotely, which may include the operating status information of the converter station equipment, such as the target opening and closing status of each switch and circuit breaker.

[0068] The target opening and closing state is the opening and closing state that matches the equipment state in the current sequence, that is, the opening and closing state of each switch and knife switch in the equipment state that the converter station equipment should reach in the current sequence.

[0069] The master station monitoring subsystem analyzes the telesignal signal to know the switches and knife switches that need to be operated currently, as well as the target opening and closing states of these switches and knife switches; after the switches and knife switches that need to be operated currently perform the corresponding opening and closing operations, the corresponding auxiliary nodes can send auxiliary node position change signals to the master station monitoring subsystem. When the master station monitoring subsystem determines that the first opening and closing state indicated by the auxiliary node position change signal of the switch and knife switch matches the corresponding target opening and closing state, it can preliminarily determine that the switch and knife switch have completed the position change, and then subsequently send a video image acquisition instruction to the video monitoring subsystem of the converter station, so that the video image information can be analyzed by the master station analysis subsystem to obtain the second opening and closing state of the switch and knife switch, so that the switch and knife switch can be double-confirmed whether the position change is completed according to the second opening and closing state, thereby improving the accuracy of determining the opening and closing state of the switch and knife switch, thereby improving the accuracy of sequential control of the converter station.

[0070] In another embodiment, it also includes: controlling the camera to capture the video image information of any switch or knife switch through the converter station video monitoring subsystem according to the video image acquisition instruction, and sending the video image information to the main station analysis subsystem through the data dedicated line, so as to analyze the video image information of any switch or knife switch through the main station analysis subsystem.

[0071] Among them, the camera can be installed in the vicinity of the switch and knife switch, and there can be one camera corresponding to multiple switches and knife switches, so that the operating parts of the switch and knife switch, such as handles, contacts, etc., can be clearly captured.

[0072] Among them, the data dedicated line can be a communication line specially used for transmitting video image information. In the converter station sequential control system, the data dedicated line is used to efficiently and safely transmit video image information, thereby ensuring real-time monitoring and control of the converter station equipment status. Exemplarily, the data dedicated line can be a communication line that transmits video image information via optical fiber.

[0073] In another embodiment, the video image information of each switch and knife switch is analyzed by the main station system to determine the second open / close state of each switch and knife switch, including: extracting features from the video image information of each switch and knife switch by the main station analysis subsystem to obtain state features of each switch and knife switch, and determining the second open / close state of each switch and knife switch based on the state features; the state features include the position, angle, and contour of the handle or contact of the switch or knife switch in the video image information.

[0074] In a specific implementation, the state feature may include the position of the handle or contact of the switch or knife switch in the video image information, that is, the specific position coordinates of the handle or contact of the switch or knife switch in the video image information; the state feature may also include the angle of the handle or contact of the switch or knife switch in the video image information, that is, the rotation angle of the switch or knife switch handle, which can directly reflect whether the device is in a split state; the state feature may also include the contour of the handle or contact of the switch or knife switch in the video image information, and the contour of the handle or contact may be extracted by edge detection to further confirm its operating state. The main station analysis subsystem may extract state features through deep learning models such as convolutional neural network models, and determine the second split state of each switch or knife switch based on the state features, thereby effectively improving the accuracy of judging the operating state of the equipment, and having a high degree of intelligence.

[0075] In another embodiment, the converter station system also includes a telecontrol device, which is used to remotely transmit signals; sending telesignaling signals and auxiliary node position change signals of any switch or knife switch to the main station monitoring subsystem through the converter station DC monitoring subsystem, including: sending telesignaling signals and auxiliary node position change signals of any switch or knife switch to the main station monitoring subsystem through the converter station DC monitoring subsystem via the telecontrol device and the dedicated area data network.

[0076] Among them, the telecontrol device can be a remote automation device (Remote Terminal Unit, RTU), which can be used for remote data transmission. Since the distance between the DC monitoring subsystem of the converter station and the main station monitoring subsystem is generally far, the telecontrol device can process the telesignaling signal and the auxiliary node displacement signal, convert it into a communication format suitable for long-distance transmission, and then transmit the processed data to the main station monitoring subsystem through the dedicated area data network.

[0077] The private data network may be a dedicated data communication network for a specific area, and the master station system and the converter station system may be transmitted through the private data network to achieve high security, high reliability and high performance network transmission. Exemplarily, the private data network may be through optical fiber communication.

[0078] In another embodiment, the master station system includes a master station monitoring subsystem, a master station analysis subsystem and an isolation device; the isolation device is used to isolate the data transmission channel between the master station monitoring subsystem and the master station analysis subsystem from unauthorized data access or an unsafe network; the analysis of video image information of each switch and knife switch by the master station system to determine the second opening and closing state of each switch and knife switch, and sending the second opening and closing state to the converter station system includes: analyzing the video image information of each switch and knife switch by the master station analysis subsystem to determine the second opening and closing state of each switch and knife switch, and sending the second opening and closing state to the master station monitoring subsystem through the isolation device; sending the second opening and closing state to the converter station system through the master station monitoring subsystem.

[0079] Among them, the isolation device can be used to manage the secure data transmission between the main station analysis subsystem and the main station monitoring subsystem to ensure the integrity, confidentiality and security of data transmission.

[0080] In a specific implementation, the isolation device can be a forward and reverse isolation device. The forward isolation function of the forward and reverse isolation device allows data to be safely transmitted from the master station analysis subsystem to the master station monitoring subsystem, ensuring that the second separation state obtained by the analysis of the master station analysis subsystem can be smoothly transmitted to the master station monitoring subsystem for further processing and transmission to the converter station system; the reverse isolation function of the forward and reverse isolation device can control the flow of data returned from the master station monitoring subsystem. If the master station monitoring subsystem needs to feedback data or information to the master station analysis subsystem, the reverse isolation device will ensure that the data is safely transmitted back without external interference or tampering. The forward and reverse isolation device usually realizes the unidirectionality of data transmission through physical isolation technology to ensure that the external network cannot directly access or affect the internal system. This physical isolation not only prevents network attacks, but also protects the internal structure and data integrity of the system. In a complex master station system, the mutual influence between the various subsystems may cause system instability. The forward and reverse isolation device ensures that the data interaction between the master station analysis subsystem and the master station monitoring subsystem is strictly controlled by limiting the flow direction of data, avoiding unnecessary interference between system modules.

[0081] In order to facilitate the understanding of those skilled in the art, FIG3 exemplarily provides a logic diagram of a converter station sequence control method based on dual confirmation of auxiliary nodes and video images. The specific process is as follows: (1) After the converter station DC monitoring subsystem issues a sequence control or switch and knife switch opening and closing operation command, it generates a telesignaling signal synchronously, and sends it to the master station system through the telecontrol device and the I zone data network (dedicated zone data network). It should be noted that the I zone, II zone, III zone and IV zone here specifically refer to the different functional zones of the converter station sequence control system. (2) The master station monitoring subsystem transfers the telesignaling signal sent by the converter station system to the master station analysis subsystem of the master station III zone / IV zone, completes the telesignaling signal analysis, combines the switch and knife switch auxiliary node displacement signal, generates the relevant switch and knife switch video image acquisition instruction, and sends it to the converter station video monitoring subsystem through the master station analysis subsystem and the III zone / IV zone dedicated line (data dedicated line). (3) After receiving the video image acquisition instruction of the switch and knife switch, the video monitoring subsystem of the converter station controls the camera to capture the video image information of the corresponding switch and knife switch, and sends it to the main station analysis subsystem via the zone III / zone IV dedicated line. (4) After the main station analysis subsystem completes the analysis of the video image information of the switch and knife switch, the switch and knife switch opening and closing status based on the video image information is sent to the data interaction zone of zone II, and then sent to the main station monitoring subsystem through the forward and reverse isolation device of the data interaction zone, and then sent to the converter station DC control subsystem through the main station monitoring subsystem of zone I and the zone I data network in the form of remote control commands. (5) After the DC control subsystem of the converter station receives the switch and knife switch opening and closing status based on the video image issued by the master station system, it can incorporate the relevant signals into the DC sequential control operation logic. Only when the opening and closing status of the switches and knife switches in the current sequence based on the feedback of the auxiliary node and the opening and closing status determined based on the video image information are in line with the target state, the subsequent switch and knife switch opening and closing instructions are issued; or, the current DC sequential control execution logic can be kept unchanged, and the opening and closing status of the switches and knife switches determined based on the video image is transferred to the DC monitoring subsystem of the converter station. When the current DC sequential control is completed and the DC monitoring subsystem of the converter station comprehensively determines that the opening and closing status of the relevant switches and knife switches determined by the video images are in line with the target state, the subsequent sequential control operation instructions are allowed to be issued. Data interaction between the converter station DC monitoring subsystem and the converter station video monitoring subsystem is realized through the master station system, and dual verification of auxiliary nodes and video images is achieved during the converter station sequential control process. This avoids the risk of equipment damage caused by auxiliary node abnormalities during the converter station sequential control execution process, which results in the subsequent switch being operated when the previous switch is not actually in place. This improves the accuracy of the converter station sequential control. At the same time, there is no need for operating personnel to inspect the status of the switches one by one after the sequential control operation, which can reduce the workload of operating personnel and promote the construction of less-manned operation and maintenance of converter stations and DC control centers.

[0082] In another embodiment, as shown in FIG4 , a converter station sequence control method based on dual confirmation of auxiliary nodes and video images is provided. The method is applied to the converter station sequence control system in FIG1 as an example for explanation. The converter station sequence control system includes a converter station system and a master station system; the converter station system includes a converter station DC monitoring subsystem and a converter station video monitoring subsystem; the master station system includes a master station monitoring subsystem, a master station analysis subsystem and an isolation device; the isolation device is used to isolate the data transmission channel between the master station monitoring subsystem and the master station analysis subsystem from unauthorized data access or an unsafe network; the converter station system also includes a telecontrol device, which is used to remotely transmit signals; the steps include:

[0083] Step S402, when the switches and circuit breakers corresponding to the converter station equipment controlled by the converter station sequence control system perform opening and closing operations matching the equipment status of the current sequence, the auxiliary node position change signals corresponding to the switches and circuit breakers are obtained through the converter station system.

[0084] The auxiliary node position change signal includes the first opening and closing state obtained by auxiliary node detection of the switch and the knife switch.

[0085] Step S404, the converter station DC monitoring subsystem sends a telesignaling signal and an auxiliary node position change signal of any switch or knife switch to the master station monitoring subsystem via the telecontrol device and the dedicated area data network.

[0086] The remote signal includes the target opening and closing state of each switch and knife switch; the target opening and closing state is the opening and closing state that matches the equipment state in the current sequence.

[0087] Step S406, when the main station monitoring subsystem determines that the first opening and closing state indicated by the auxiliary node position change signal of any switch or knife switch matches the target opening and closing state corresponding to any switch or knife switch, the video image acquisition instruction for any switch or knife switch is sent to the converter station video monitoring subsystem.

[0088] Among them, the video image acquisition instruction is used to instruct the video monitoring subsystem of the converter station to control the camera to capture the video image information of any switch or knife switch, and send the video image information to the main station analysis subsystem, so that the main station analysis subsystem can analyze the video image information of any switch or knife switch to obtain the second open or close state of any switch or knife switch.

[0089] Step S408, the video monitoring subsystem of the converter station controls the camera to capture the video image information of any switch or knife switch according to the video image acquisition instruction, and sends the video image information to the main station analysis subsystem through the data dedicated line, so as to analyze the video image information of any switch or knife switch through the main station analysis subsystem.

[0090] Step S410, extracting features from the video image information of each switch and knife switch through the main station analysis subsystem to obtain state features of each switch and knife switch, and determining the second opening and closing state of each switch and knife switch according to the state features.

[0091] The state features include the position, angle, and outline of the handle or contact of the switch or knife switch in the video image information.

[0092] Step S412: The master station analysis subsystem sends the second opening and closing state to the master station monitoring subsystem through the isolation device, and the master station monitoring subsystem sends the second opening and closing state to the converter station system.

[0093] Step S414, when the converter station DC monitoring subsystem determines that both the first opening and closing state and the second opening and closing state meet the target state, each switch and circuit breaker corresponding to the converter station equipment is allowed to perform opening and closing operations matching the equipment state of the next sequence.

[0094] It should be noted that the specific definition of the above steps can refer to the specific definition of a converter station sequence control method based on dual confirmation of auxiliary nodes and video images above.

[0095] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0096] Based on the same inventive concept, the embodiment of the present application also provides a converter station sequence control device based on dual confirmation of auxiliary nodes and video images for implementing the converter station sequence control method based on dual confirmation of auxiliary nodes and video images involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more embodiments of the converter station sequence control device based on dual confirmation of auxiliary nodes and video images provided below can be referred to the limitations of the converter station sequence control method based on dual confirmation of auxiliary nodes and video images above, and will not be repeated here.

[0097] In an exemplary embodiment, as shown in FIG5 , a converter station sequence control device based on dual confirmation of an auxiliary node and a video image is provided, which is applied to a converter station sequence control system. The converter station sequence control system includes a converter station system and a master station system. The device includes:

[0098] The converter station module 510 is used to obtain the auxiliary node position change signals corresponding to each switch and knife switch through the converter station system when each switch and knife switch corresponding to the converter station equipment controlled by the converter station sequential control system performs an opening and closing operation matching the equipment state of the current sequence; the auxiliary node position change signal includes the first opening and closing state obtained by the auxiliary node detection of the switch and knife switch.

[0099] The master station module 520 is used to analyze the video image information of each switch and knife switch through the master station system, determine the second opening and closing state of each switch and knife switch, and send the second opening and closing state to the converter station system.

[0100] The converter station module 510 is also used to allow the switches and circuit breakers corresponding to the converter station equipment to perform opening and closing operations matching the equipment state of the next sequence when it is determined through the converter station system that the first opening and closing state and the second opening and closing state both meet the target state.

[0101] In one embodiment, the converter station system includes a converter station DC monitoring subsystem and a converter station video monitoring subsystem; the master station system includes a master station monitoring subsystem and a master station analysis subsystem;

[0102] The converter station module 510 is specifically used to send a telesignal signal and an auxiliary node change signal of any switch or circuit breaker to the main station monitoring subsystem through the converter station DC monitoring subsystem; the telesignal signal includes the target opening and closing state of each switch and circuit breaker; the target opening and closing state is an opening and closing state that matches the equipment state of the current sequence.

[0103] The master station module 520 is specifically used to send a video image acquisition instruction for any of the switches and knife switches to the converter station video monitoring subsystem when it is determined through the master station monitoring subsystem that the first opening and closing state indicated by the auxiliary node position change signal of any of the switches and knife switches matches the target opening and closing state corresponding to any of the switches and knife switches;

[0104] Among them, the video image acquisition instruction is used to instruct the converter station video monitoring subsystem to control the camera to capture the video image information of any of the switches and knife switches, and send the video image information to the main station analysis subsystem, so that the main station analysis subsystem can analyze the video image information of any of the switches and knife switches to obtain the second open and close state of any of the switches and knife switches.

[0105] In one of the embodiments, the converter station module 510 is specifically used to control the camera to capture the video image information of any of the switches and knife switches through the converter station video monitoring subsystem according to the video image acquisition instruction, and send the video image information to the main station analysis subsystem through a dedicated data line, so as to analyze the video image information of any of the switches and knife switches through the main station analysis subsystem.

[0106] In one embodiment, the main station module 520 is specifically used to extract features from the video image information of each switch and knife switch through the main station analysis subsystem to obtain state features of each switch and knife switch, and determine the second open and close state of each switch and knife switch based on the state features; the state features include the position, angle, and contour of the handle or contact of the switch or knife switch in the video image information.

[0107] In one embodiment, the converter station system also includes a telecontrol device, which is used to remotely transmit signals; the converter station module 510 is specifically used to send the telesignaling signal and the auxiliary node position change signal of any switch or knife switch to the main station monitoring subsystem through the converter station DC monitoring subsystem via the telecontrol device and the dedicated data network.

[0108] In one embodiment, the master station system includes a master station monitoring subsystem, a master station analysis subsystem and an isolation device; the isolation device is used to isolate the data transmission channel between the master station monitoring subsystem and the master station analysis subsystem from unauthorized data access or unsafe networks; the master station module 520 is specifically used to analyze the video image information of each switch and knife switch through the master station analysis subsystem, determine the second open and close state of each switch and knife switch, and send the second open and close state to the master station monitoring subsystem through the isolation device; send the second open and close state to the converter station system through the master station monitoring subsystem.

[0109] Each module in the converter station sequence control device based on dual confirmation of auxiliary nodes and video images can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each of the above modules.

[0110] In an exemplary embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be shown in FIG6. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit, and an input device. The processor, the memory, and the input / output interface are connected via a system bus, and the communication interface, the display unit, and the input device are connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, near field communication (NFC) or other technologies. When the computer program is executed by the processor, a converter station sequence control method based on dual confirmation of an auxiliary node and a video image is implemented. The display unit of the computer device is used to form a visually visible picture, and can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a key, trackball, or touchpad provided on the computer device housing, or an external keyboard, touchpad, or mouse, etc.

[0111] Those skilled in the art will understand that the structure shown in FIG. 6 is merely a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0112] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0113] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0114] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0115] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0116] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0117] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0118] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the present application. It should be noted that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A converter station sequence control method based on dual confirmation of auxiliary nodes and video images, characterized in that: Applied to a converter station sequential control system, the converter station sequential control system includes a converter station system and a master station system; the converter station system includes a converter station DC monitoring subsystem and a converter station video monitoring subsystem; the master station system includes a master station monitoring subsystem and a master station analysis subsystem; the method includes: When the switches and circuit breakers corresponding to the converter station equipment controlled by the converter station sequence control system perform opening and closing operations matching the equipment state of the current sequence, the auxiliary node position change signals corresponding to the switches and circuit breakers are obtained through the converter station system; the auxiliary node position change signals include the first opening and closing states obtained by the auxiliary node detection of the switches and circuit breakers; Sending a telesignal signal and an auxiliary node position change signal of any of the switches and knife switches to the master station monitoring subsystem through the converter station DC monitoring subsystem; the telesignal signal includes a target opening and closing state of each of the switches and knife switches; the target opening and closing state is an opening and closing state that matches the device state of the current sequence; When the master station monitoring subsystem determines that the first opening and closing state indicated by the auxiliary node position change signal of any of the switches and knife switches matches the target opening and closing state corresponding to any of the switches and knife switches, a video image acquisition instruction for any of the switches and knife switches is sent to the converter station video monitoring subsystem; wherein the video image acquisition instruction is used to instruct the converter station video monitoring subsystem to control a camera to capture video image information of any of the switches and knife switches, and send the video image information to the master station analysis subsystem, so that the master station analysis subsystem analyzes the video image information of any of the switches and knife switches to obtain the second opening and closing state of any of the switches and knife switches; The master station system analyzes the video image information of each switch and knife switch to determine the second opening and closing state of each switch and knife switch, and sends the second opening and closing state to the converter station system; When the converter station system determines that both the first opening and closing state and the second opening and closing state meet the target state, the switches and circuit breakers corresponding to the converter station equipment are allowed to perform opening and closing operations matching the equipment state of the next sequence.

2. The method according to claim 1, characterized in that The method further comprises: The converter station video monitoring subsystem controls the camera to capture the video image information of any of the switches and knife switches according to the video image acquisition instructions, and sends the video image information to the main station analysis subsystem through a dedicated data line, so that the main station analysis subsystem can analyze the video image information of any of the switches and knife switches.

3. The method according to claim 1, characterized in that The analyzing the video image information of each switch and knife switch by the master station system to determine the second opening and closing state of each switch and knife switch includes: The main station analysis subsystem extracts features from the video image information of each switch and knife switch to obtain state features of each switch and knife switch, and determines the second open and close state of each switch and knife switch based on the state features; the state features include the position, angle, and contour of the handle or contact of the switch or knife switch in the video image information.

4. The method according to claim 1, characterized in that: The converter station system further includes a telecontrol device, which is used for remote signal transmission; the sending of telesignaling signals and auxiliary node position change signals of any switch or knife switch to the master station monitoring subsystem through the converter station DC monitoring subsystem includes: The remote signal and the auxiliary node position change signal of any switch or knife switch are sent to the master station monitoring subsystem through the converter station DC monitoring subsystem via the remote control device and the dedicated area data network.

5. The method according to claim 1, characterized in that The master station system includes a master station monitoring subsystem, a master station analysis subsystem and an isolation device; the isolation device is used to isolate the data transmission channel between the master station monitoring subsystem and the master station analysis subsystem from unauthorized data access or an unsafe network; the master station system analyzes the video image information of each switch and knife switch to determine the second opening and closing state of each switch and knife switch, and sends the second opening and closing state to the converter station system, including: The main station analysis subsystem analyzes the video image information of each switch and knife switch to determine the second opening and closing state of each switch and knife switch, and sends the second opening and closing state to the main station monitoring subsystem through the isolation device; The second opening and closing state is sent to the converter station system through the master station monitoring subsystem.

6. A converter station sequence control device based on dual confirmation of auxiliary nodes and video images, characterized in that: Applied to a converter station sequential control system, the converter station sequential control system includes a converter station system and a master station system; the converter station system includes a converter station DC monitoring subsystem and a converter station video monitoring subsystem; the master station system includes a master station monitoring subsystem and a master station analysis subsystem; the device includes: The converter station module is used for obtaining auxiliary node position change signals respectively corresponding to the switches and knife switches through the converter station system when the switches and knife switches corresponding to the converter station equipment controlled by the converter station sequence control system perform opening and closing operations matching the equipment state of the current sequence; the auxiliary node position change signals include the first opening and closing state obtained by the auxiliary node detection of the switches and knife switches; The converter station module is further used to send a telesignal signal and an auxiliary node position change signal of any of the switches and knife switches to the master station monitoring subsystem through the converter station DC monitoring subsystem; the telesignal signal includes a target opening and closing state of each switch and knife switch; the target opening and closing state is an opening and closing state that matches the device state of the current sequence; A master station module, for sending a video image acquisition instruction for any of the switches and knife switches to the converter station video monitoring subsystem when it is determined through the master station monitoring subsystem that the first opening and closing state indicated by the auxiliary node position change signal of any of the switches and knife switches matches the target opening and closing state corresponding to any of the switches and knife switches; wherein the video image acquisition instruction is used to instruct the converter station video monitoring subsystem to control a camera to capture video image information of any of the switches and knife switches, and send the video image information to the master station analysis subsystem, so as to obtain the second opening and closing state of any of the switches and knife switches through the master station analysis subsystem. The master station module is further used to analyze the video image information of each switch and knife switch through the master station system, determine the second opening and closing state of each switch and knife switch, and send the second opening and closing state to the converter station system; The converter station module is also used to allow the switches and circuit breakers corresponding to the converter station equipment to perform opening and closing operations matching the equipment state of the next sequence when it is determined through the converter station system that the first opening and closing state and the second opening and closing state both meet the target state.

7. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 5 are implemented.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

9. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

Images