Converter station sequence control system based on hard wiring transmission

Abstract

The invention relates to a converter station sequence control system based on hard wiring transmission. The converter station sequence control system comprises a converter station system and a main station system. The converter station system comprises a converter station direct current monitoring subsystem and a converter station video monitoring subsystem; the converter station direct current monitoring subsystem is used for sending a first on-off state of a switch of converter station equipment to the main station system; the first opening and closing state is obtained through monitoring of the converter station direct current monitoring subsystem; the master station system is used for sending the video image acquisition instruction to the converter station video monitoring subsystem; the video image acquisition instruction is generated in response to the first opening and closing state; the video image acquisition instruction is used for indicating the converter station video monitoring subsystem to acquire a second on-off state of the switch of the converter station equipment; and the converter station video monitoring subsystem is used for transmitting the second opening and closing state to the converter station direct current monitoring subsystem through hard wiring. By adopting the system, the robustness of the converter station sequence control system can be improved.

Description

Technical Field

[0001] The present application relates to the field of power electronics technology, and in particular to a converter station sequential control system based on hard-wired transmission. Background Art

[0002] In modern power systems, DC transmission systems are widely used in long-distance, large-capacity power transmission due to their advantages such as high transmission efficiency and low loss. As the core node of the DC transmission system, the device state conversion process inside the converter station is crucial to the safe operation of the power system. In order to achieve sequential control of the device state in the converter station, the existing DC transmission system usually uses sensors to feedback the separation and connection status of the equipment. However, the system is susceptible to sensor failure or false alarms, which triggers the operation of subsequent equipment when the status of the previous equipment is not in place, resulting in poor robustness of the converter station sequential control system. Summary of the invention

[0003] Based on this, it is necessary to provide a converter station sequence control system based on hard-wired transmission that can improve the robustness of the converter station sequence control system in response to the above technical problems.

[0004] The present application provides a converter station sequence control system based on hard-wired transmission, 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;

[0005] The converter station DC monitoring subsystem is used to send a first opening and closing state of a switch of a converter station device to the master station system; the first opening and closing state is obtained by monitoring by the converter station DC monitoring subsystem;

[0006] The master station system is used to send a video image acquisition instruction to the converter station video monitoring subsystem; the video image acquisition instruction is generated in response to the first opening and closing state; the video image acquisition instruction is used to instruct the converter station video monitoring subsystem to obtain a second opening and closing state of the switch of the converter station equipment; the second opening and closing state is obtained by analyzing the video image information of the converter station equipment;

[0007] The converter station video monitoring subsystem is used to transmit the second opening and closing state to the converter station DC monitoring subsystem through hard wiring.

[0008] In one embodiment, the converter station system further includes a conversion device and a signal interface device, one end of the hard wiring is electrically connected to the converter station DC monitoring subsystem through the signal interface device, and the other end of the hard wiring is electrically connected to the converter station video monitoring subsystem through the conversion device;

[0009] The converter station video monitoring subsystem is further used to convert the second opening and closing state into a target signal that conforms to the hard wiring transmission form through the conversion device, and transmit the target signal to the signal interface device of the converter station DC monitoring subsystem through the hard wiring;

[0010] The converter station DC monitoring subsystem is further used to analyze the target signal through the signal interface device to obtain the second opening and closing state.

[0011] In one of the embodiments, the master station system includes a master station monitoring subsystem and a master station operation support subsystem;

[0012] The master station monitoring subsystem is used to generate a video image acquisition instruction according to the first opening and closing state, and send the video image acquisition instruction to the master station operation support subsystem;

[0013] The main station operation support subsystem is used to forward the video image acquisition instruction to the converter station video monitoring subsystem.

[0014] In one embodiment, the converter station DC monitoring subsystem is further used to send a remote signal and the first opening and closing state to the master station monitoring subsystem; the remote signal includes a target opening and closing state of the switch; the target opening and closing state is an opening and closing state that matches the current sequence;

[0015] The master station monitoring subsystem is further configured to send the video image acquisition instruction to the master station operation support subsystem when it is determined that the first opening and closing state matches the target opening and closing state.

[0016] In one of the embodiments, the converter station system further comprises a telecontrol device, and the telecontrol device is used to remotely transmit data between the converter station DC monitoring subsystem and the master station monitoring subsystem;

[0017] The converter station DC monitoring subsystem is also used to send the telesignaling signal and the first opening and closing state to the master station monitoring subsystem through the telecontrol device and the dedicated area data network.

[0018] In one of the embodiments, the main station operation support subsystem is used to send the video image acquisition instruction to the converter station video monitoring subsystem through a dedicated data line.

[0019] In one of the embodiments, the master station system further includes an isolation device; the isolation device is used to isolate the data transmission channel between the master station monitoring subsystem and the master station operation support subsystem from unauthorized data access requests or unsafe networks.

[0020] In one of the embodiments, the converter station DC monitoring subsystem is used to confirm that the switch of the converter station equipment has completed the opening and closing operation matching the current sequence when it is determined that the first opening and closing state and the second opening and closing state both meet the target state, and control the switch of the converter station equipment to perform the opening and closing operation matching the next sequence.

[0021] In one of the embodiments, the converter station video monitoring subsystem is also used to extract features from the video image information to obtain state features of the switch, and determine the second open / close state of the switch based on the state features; the state features include the position, angle, and contour of the handle or contact of the switch in the video image information.

[0022] In one of the embodiments, the converter station DC monitoring subsystem is also used to send a warning message to the master station system when it is determined that at least one of the first opening and closing state and the second opening and closing state does not meet the target state; the warning message is used to indicate that an abnormal situation has occurred in the converter station sequential control system.

[0023] The above-mentioned converter station sequential control system based on hard-wired transmission 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 converter station DC monitoring subsystem is used to send a first opening and closing state of the switch of the converter station equipment to the master station system, and the first opening and closing state is monitored by the converter station DC monitoring subsystem; the master station system is used to send a video image acquisition instruction to the converter station video monitoring subsystem, and the video image acquisition instruction is generated in response to the first opening and closing state; the video image acquisition instruction is used to instruct the converter station video monitoring subsystem to obtain a second opening and closing state of the switch of the converter station equipment, and the second opening and closing state is obtained by analyzing the video image information of the converter station equipment; the converter station video monitoring subsystem is used to transmit the second opening and closing state to the converter station DC monitoring subsystem through hard wiring. The converter station sequential control system can obtain the first opening and closing state of the switch of the converter station equipment through the converter station DC monitoring subsystem, and obtain the second opening and closing state of the switch of the converter station equipment through the main station system according to the first opening and closing state. The opening and closing state of the switch of the converter station equipment determined by at least one data source can be obtained to improve the comprehensiveness and accuracy of determining the opening and closing state of the switch of the converter station equipment, thereby being able to improve the accuracy of sequential control in the process of sequentially controlling the state of the converter station equipment, effectively avoiding erroneous operation caused by abnormal single sensor signal, ensuring that the next step of operation is allowed only after the equipment meets the target requirements in both physical and logical states, thereby improving the reliability, stability and safety of the converter station sequential control system; in addition, the opening and closing state of the switch obtained by video image information analysis is transmitted through hard wiring, which enhances the stability of data transmission, avoids data delay or interference, and comprehensively improves the robustness of the converter station sequential control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] FIG1 is a structural block diagram of a converter station sequential control system based on hard-wired transmission in one embodiment;

[0026] FIG2 is a block diagram of another converter station sequential control system based on hard-wired transmission in one embodiment;

[0027] FIG3 is a structural block diagram of a converter station sequential control system based on hard-wired transmission in another embodiment;

[0028] FIG4 is a structural block diagram of another converter station sequential control system based on hard-wired transmission in another embodiment;

[0029] FIG5 is a structural block diagram of yet another converter station sequential control system based on hard-wired transmission in an embodiment. DETAILED DESCRIPTION

[0030] 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.

[0031] In an exemplary embodiment, as shown in FIG1 , a structural block diagram of a converter station sequence control system based on hard-wired transmission is provided. The converter station sequential control system 102 includes a converter station system 104 and a master station system 106. The converter station system 104 includes a converter station DC monitoring subsystem 1041 and a converter station video monitoring subsystem 1042. The converter station DC monitoring subsystem 1041 is used to send a first opening and closing state of the switch of the converter station equipment to the master station system 106. The first opening and closing state is obtained by monitoring the converter station DC monitoring subsystem 1041. The master station system 106 is used to send a video image acquisition instruction to the converter station video monitoring subsystem 1042. The video image acquisition instruction is generated in response to the first opening and closing state. The video image acquisition instruction is used to instruct the converter station video monitoring subsystem 1042 to obtain a second opening and closing state of the switch of the converter station equipment. The second opening and closing state is obtained by analyzing the video image information of the converter station equipment. The converter station video monitoring subsystem 1042 is used to transmit the second opening and closing state to the converter station DC monitoring subsystem 1041 through hard wiring.

[0032] The converter station sequential control system 102 may be a system for managing and controlling the state conversion of equipment in the converter station. The converter station sequential control system 102 realizes the state conversion of the 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. The converter station sequential control system 102 is used to sequentially control the equipment state of the converter station equipment, and the equipment state of the converter station equipment is determined according to the opening and closing states of each switch corresponding to the converter station equipment. The equipment state may include the working mode or operation state of each device in the converter station, such as maintenance, cold standby, hot standby, operation, etc., and the change of the equipment state is achieved by performing specific opening and closing operations on the relevant switches.

[0033] Among them, the on / off state of the switch can be the operating state of the switch in the converter station, namely "closed" (closed) and "open" (open). These on / off states directly affect the overall working state of the converter station equipment and are the basis for the equipment state conversion.

[0034] 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 the switch opening and closing states fed back by the auxiliary nodes of the switches, and execute control commands issued by the master station system 106.

[0035] The converter station DC monitoring subsystem 1041 may be a system for monitoring and controlling the state of converter station equipment, and controls the converter station equipment to perform equipment state switching operations in a predetermined order. The converter station DC monitoring subsystem 1041 obtains the switch opening and closing states detected by the auxiliary node, and obtains the switch opening and closing states obtained by the converter station video monitoring subsystem 1042 based on video image information analysis, and performs opening and closing operations on each switch according to whether each opening and closing state meets the target state, thereby realizing double confirmation of the converter station equipment state.

[0036] The converter station video monitoring subsystem 1042 may collect and analyze the video image information of the switch, determine the on / off state of the converter station equipment based on the video image information, and transmit the on / off state to the converter station DC monitoring subsystem 1041.

[0037] 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, etc. The master station system 106 may send a video image acquisition instruction to the converter station video monitoring subsystem according to the switch on / off status monitored by the converter station DC monitoring subsystem.

[0038] The converter station DC monitoring subsystem 1041 is used to obtain the first opening and closing states corresponding to each switch when each switch corresponding to the converter station equipment performs an opening and closing operation matching the equipment state of the current sequence; the first opening and closing state can be the opening and closing state of the switch obtained by the auxiliary node of the switch.

[0039] 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 operating state (such as the opening and closing state) of the switch or knife switch, and can provide real-time status feedback. The first opening and closing state of the switch detected by the auxiliary node can indicate whether the switch has correctly performed the expected operation.

[0040] 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 each switch 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, each switch needs to perform an 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.

[0041] The master station system 106 can send a video image acquisition instruction to the converter station video monitoring subsystem 1042. The master station system 106 can send the video image acquisition instruction to the converter station video monitoring subsystem 1042 at a preset interval, or can send the video image acquisition instruction to the converter station video monitoring subsystem 1042 when determining that the switch is changed according to the first open / close state of the switch.

[0042] The converter station video monitoring subsystem 1042 can control the camera to capture the video image information of the converter station equipment according to the video image acquisition instruction, and analyze the video image information to obtain the second open / close state of the switch of the converter station equipment.

[0043] The video image information may be video or image information captured by the converter station video monitoring subsystem 1042 through a camera of the switch of the converter station equipment. The converter station video monitoring subsystem 1042 may control the camera to capture the video image information of each switch according to the video image acquisition instruction. The camera may be installed in the vicinity of the switch, and one camera may correspond to multiple switches, so that the operating components of the switch, such as handles, contacts, etc., may be clearly captured.

[0044] The converter station video monitoring subsystem 1042 can perform frame-by-frame image analysis on the switch video captured by the camera, which can be to analyze visual features in the image, such as the physical location of the switch, indicator signs and other visual features, to determine whether the switch is in a closed state or an open state. The second open-close state is the open-close state of the switch determined by analyzing the video image information of the switch.

[0045] The converter station video monitoring subsystem 1042 transmits the second opening and closing state to the converter station DC monitoring subsystem 1041 through hard wiring 108. Hard wiring 108 can refer to a method of directly connecting two devices or systems through physical wires for transmitting electrical signals or data. Transmitting the second opening and closing state through hard wiring not only improves the reliability and real-time performance of signal transmission, but also ensures that the signal can be transmitted stably and accurately in a high electromagnetic interference environment. This double confirmation mechanism strengthens the system's accurate feedback on the operating status of switches and knife switches through hard wiring, reducing the risk of equipment misoperation caused by signal delay or loss.

[0046] The converter station DC monitoring subsystem 1041 can be used to confirm that the switches of the converter station equipment have completed the opening and closing operations matching the current sequence when it is determined that the first opening and closing state and the second opening and closing state both meet the target state, and control the switches of the converter station equipment to perform the opening and closing operations matching the next sequence.

[0047] The target state may be a desired state preset by the converter station system 104, or may be a specific state that the switch is required to reach in a certain sequence of operations, such as switch A needs to be closed and switch B needs to be opened.

[0048] When the converter station DC monitoring subsystem 1041 determines that the first opening and closing state and the second opening and closing state of each switch 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 control each switch 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.

[0049] The above-mentioned converter station sequential control system based on hard-wired transmission 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 converter station DC monitoring subsystem is used to send a first opening and closing state of the switch of the converter station equipment to the master station system, and the first opening and closing state is monitored by the converter station DC monitoring subsystem; the master station system is used to send a video image acquisition instruction to the converter station video monitoring subsystem, and the video image acquisition instruction is generated in response to the first opening and closing state; the video image acquisition instruction is used to instruct the converter station video monitoring subsystem to obtain a second opening and closing state of the switch of the converter station equipment, and the second opening and closing state is obtained by analyzing the video image information of the converter station equipment; the converter station video monitoring subsystem is used to transmit the second opening and closing state to the converter station DC monitoring subsystem through hard wiring. The converter station sequential control system can obtain the first opening and closing state of the switch of the converter station equipment through the converter station DC monitoring subsystem, and obtain the second opening and closing state of the switch of the converter station equipment through the main station system according to the first opening and closing state. The opening and closing state of the switch of the converter station equipment determined by at least one data source can be obtained to improve the comprehensiveness and accuracy of determining the opening and closing state of the switch of the converter station equipment, thereby being able to improve the accuracy of sequential control in the process of sequentially controlling the state of the converter station equipment, effectively avoiding erroneous operation caused by abnormal single sensor signal, ensuring that the next step of operation is allowed only after the equipment meets the target requirements in both physical and logical states, thereby improving the reliability, stability and safety of the converter station sequential control system; in addition, the opening and closing state of the switch obtained by video image information analysis is transmitted through hard wiring, which enhances the stability of data transmission, avoids data delay or interference, and comprehensively improves the robustness of the converter station sequential control system.

[0050] Based on the above converter station sequential control system, further, in an exemplary embodiment, as shown in FIG2 , a structural block diagram of another converter station sequential control system based on hard-wired transmission is provided. The converter station system 104 also includes a conversion device 202 and a signal interface device 204, one end of the hard-wired connection is electrically connected to the converter station DC monitoring subsystem 1041 through the signal interface device 204, and the other end of the hard-wired connection 108 is electrically connected to the converter station video monitoring subsystem 1042 through the conversion device 202; the converter station video monitoring subsystem 1042 is also used to convert the second split-close state into a target signal that conforms to the hard-wired transmission form through the conversion device 202, and transmit the target signal to the signal interface device 204 of the converter station DC monitoring subsystem 1041 through the hard-wired connection 108; the converter station DC monitoring subsystem 1041 is also used to parse the target signal through the signal interface device 204 to obtain the second split-close state.

[0051] The conversion device 202 may be used to convert the signal from the video surveillance subsystem into a target signal that complies with the hard-wired transmission standard. Optionally, the conversion device 202 may include but is not limited to an analog-to-digital converter (ADC), a digital signal processor (DSP), and a signal transmitter.

[0052] The signal interface device 204 may be a device for receiving hard-wired transmission signals, which receives the target signal transmitted by the hard-wired signal, analyzes the signal, and restores it to device status data that can be recognized and processed by the system. Optionally, the signal interface device 204 may include but is not limited to a signal decoder, an interface module, and a signal processing unit.

[0053] Optionally, the target signal that conforms to the hard-wired transmission form may include a switch signal, an analog signal, a pulse signal, a relay signal, etc.

[0054] Based on the above converter station sequential control system, further, in another exemplary embodiment, as shown in FIG3 , a converter station sequential control system based on hard-wired transmission is provided. The master station system 106 includes a master station monitoring subsystem 1061 and a master station operation support subsystem 1062; the master station monitoring subsystem 1061 is used to generate a video image acquisition instruction according to the first opening and closing state, and send the video image acquisition instruction to the master station operation support subsystem 1062; the master station operation support subsystem 1062 is used to forward the video image acquisition instruction to the converter station video monitoring subsystem 1042.

[0055] The master station monitoring subsystem 1061 may be used to receive and analyze the first opening and closing state, and send a video image acquisition instruction to the master station operation support subsystem 1062 according to the analysis result. Exemplarily, if the analysis result of the first opening and closing state indicates that the switch has changed position, a video image acquisition instruction may be sent to the master station operation support subsystem 1062.

[0056] Among them, the main station operation support subsystem 1062 can serve as an intermediary for information transmission to ensure that the video image acquisition instructions generated by the main station monitoring subsystem can be effectively transmitted to the converter station video monitoring subsystem. In a specific implementation, the main station operation support subsystem 1062 can detect whether the converter station video monitoring subsystem is in an idle state where it can receive instructions, and forward the video image acquisition instructions to the converter station video monitoring subsystem when the converter station video monitoring subsystem is in an idle state where it can receive instructions; or, the video image acquisition instructions can be forwarded to the converter station video monitoring subsystem via a dedicated data line, so that the video image acquisition instructions generated by the main station monitoring subsystem can be effectively transmitted to the converter station video monitoring subsystem. Based on the above-mentioned converter station sequential control system, further, in an exemplary embodiment, the converter station DC monitoring subsystem 1041 is also used to send a telesignal signal and a first opening and closing state to the master station monitoring subsystem 1061; the telesignal signal includes the target opening and closing state of the switch; the target opening and closing state is the opening and closing state matching the current sequence; the master station monitoring subsystem 1061 is also used to send a video image acquisition instruction to the master station operation support subsystem 1062 when it is determined that the first opening and closing state matches the target opening and closing state.

[0057] Among them, the telesignaling signal may refer to a remotely transmitted signal, which may include operating status information of the converter station equipment, such as the target opening and closing status of each switch.

[0058] The target opening and closing state is the opening and closing state that matches the device state of the current sequence, that is, the opening and closing state of each switch in the device state that the converter station equipment should reach in the current sequence.

[0059] The master station monitoring subsystem 1061 analyzes the telesignal signal to know the switch that currently needs to be operated and the target opening and closing states of these switches in the current sequence during the sequential control of the converter station; after the switch that currently needs to be operated completes the corresponding opening and closing operation, the auxiliary node corresponding to the switch can send the detected first opening and closing state to the master station monitoring subsystem 1061. When the master station monitoring subsystem 1061 determines that the first opening and closing state matches the target opening and closing state, it can preliminarily determine that the switch has completed the position change, and then send a video image acquisition instruction to the master station operation support subsystem 1062.

[0060] Based on the above converter station sequential control system, further, in another exemplary embodiment, as shown in FIG4 , a structural block diagram of another converter station sequential control system based on hard-wired transmission is provided. The converter station system 104 further includes a telecontrol device 402, which is used to remotely transmit data between the converter station DC monitoring subsystem 1041 and the master station monitoring subsystem 1061; the converter station DC monitoring subsystem 1041 is also used to send a telesignaling signal and a first opening and closing state to the master station monitoring subsystem 1061 through the telecontrol device 402 and the dedicated area data network.

[0061] Among them, the remote control device 402 can be a remote automation device (Remote Terminal Unit, RTU), which can be used for remote data transmission. Since the distance between the converter station DC monitoring subsystem 1041 and the main station monitoring subsystem 1061 is generally far, the remote control device 402 can process the remote signal and the first opening and closing state, convert them into a communication format suitable for long-distance transmission, and then transmit the processed data to the main station monitoring subsystem 1061 through the dedicated area data network.

[0062] 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.

[0063] Based on the above converter station sequential control system, further, in another exemplary embodiment, the main station operation support subsystem 1062 is used to send the video image acquisition instruction to the converter station video monitoring subsystem 1042 through the data dedicated line.

[0064] 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.

[0065] After receiving the video image acquisition instructions from the main station monitoring subsystem, the main station operation support subsystem 1062 is responsible for transmitting these instructions to the converter station video monitoring subsystem through a dedicated data line. It is the executor of data transmission, ensuring that the video image acquisition instructions can be correctly transmitted between different subsystems; communicating through a dedicated data line can ensure that important control instructions (such as video image acquisition instructions) are not interfered with during transmission, reduce the risk of delay or data loss, and maintain the high reliability of information transmission; provide reliable information transmission support for the main station monitoring subsystem, and ensure smooth information exchange between the main station and the converter station.

[0066] Based on the above-mentioned converter station sequential control system, further, in another exemplary embodiment, the master station system also includes an isolation device 404; the isolation device 404 is used to isolate the data transmission channel between the master station monitoring subsystem 1061 and the master station operation support subsystem 1062 from unauthorized data access requests or unsafe networks.

[0067] Among them, the isolation device 404 can be used to manage the secure data transmission between the main station operation support subsystem and the main station monitoring subsystem to ensure the integrity, confidentiality and security of data transmission.

[0068] In a specific implementation, the isolation device can be a forward and reverse isolation device. The isolation device can allow the video image acquisition instructions to be safely transmitted from the master station monitoring subsystem to the master station operation support subsystem, and realize the unidirectionality of data and instruction transmission through physical isolation technology, ensuring that external networks or data access requests 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 master station system. In a complex master station system, the mutual influence between the various subsystems may cause system instability. The 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, thereby avoiding unnecessary interference between system modules.

[0069] In another exemplary embodiment, the converter station video monitoring subsystem 1042 is also used to extract features from the video image information to obtain the state features of the switch, and determine the second open / close state of the switch based on the state features; the state features include the position, angle, and contour of the switch handle or contact in the video image information.

[0070] Among them, in a specific implementation, the state feature may include the position of the switch handle or contact in the video image information, that is, the specific position coordinates of the switch handle or contact in the video image information; the state feature may also include the angle of the switch handle or contact 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 switch handle or contact in the video image information, and the contour of the handle and contact may be extracted by edge detection to further confirm its operating state. The converter station video monitoring subsystem 1042 may extract state features through deep learning models such as convolutional neural network models, and determine the second split state of each 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.

[0071] In an exemplary embodiment, the converter station DC monitoring subsystem 1041 is also used to send a warning message to the master station system 106 when it is determined that at least one of the first opening and closing state and the second opening and closing state does not meet the target state; the warning message is used to indicate that an abnormality has occurred in the converter station sequential control system.

[0072] Among them, the warning information can be used to indicate abnormal conditions during the switch opening and closing operations, prompting further inspection and operation.

[0073] In a specific implementation, upon receiving a warning message, the master station system can automatically stop subsequent operations to prevent the fault from expanding.

[0074] During the sequential control process, the converter station DC monitoring subsystem monitors the status of each switch in real time. If the first opening and closing state or the second opening and closing state does not match the target state, it can be determined that an abnormal situation has occurred. This may be due to a failure in the switch operation, or an error in the sensor or video analysis, so that abnormality detection can be achieved. Once it is found that the actual state of the converter station equipment does not match the target state, the system will immediately send a warning message to the master station. This enables the master station system to respond quickly, such as suspending subsequent operations, notifying on-site personnel to check the equipment, or taking emergency measures based on the warning content to prevent further errors in operation, thereby improving the safety of the converter station sequential control system.

[0075] To facilitate the understanding of those skilled in the art, in another embodiment, FIG5 exemplarily provides a structural block diagram of another converter station sequential control system based on hard-wired transmission, and the specific process is as follows: (1) After the converter station DC monitoring subsystem issues the sequential control switch opening and closing operation command, it synchronously generates a telesignal signal, which is sent to the master station through the telecontrol device and the zone I data network (special zone data network). (2) The master station transfers the telesignal signal sent by the converter station to the master station monitoring subsystem of zone II of the master station, completes the telesignal signal analysis, and generates the relevant switch video image information acquisition command in combination with the position change signal of the switch auxiliary node, which is sent to the converter station video monitoring subsystem through the master station operation support subsystem of zone III / zone IV of the master station and the zone III / zone IV data dedicated line. (3) After receiving the switch video image acquisition command, the converter station video monitoring subsystem controls the camera to capture the corresponding switch video image information, completes the switch opening and closing state analysis based on the video image, and connects the switch opening and closing state determined based on the video image information to the converter station DC monitoring subsystem in a hard-wired manner through the conversion device and the signal interface device. (4) After the DC monitoring subsystem of the converter station receives the switch opening and closing states determined based on the video images sent by the converter station zone III / zone IV through hard wiring, it can incorporate the relevant signals into the DC sequence control operation logic. Only when the opening and closing states of the preceding switch based on the auxiliary node and the opening and closing states based on the video images meet the target states, the subsequent switch opening and closing commands are issued. Alternatively, the switch opening and closing states determined based on the video images are transferred to the DC monitoring subsystem of the converter station without changing the current DC sequence control execution logic. After the DC sequence control is completed and the DC monitoring subsystem of the converter station comprehensively determines that the video image states of the relevant switches meet the target states, the subsequent sequence control operation instructions are allowed to be issued.

[0076] 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.

[0077] 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.

[0078] 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 understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations 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 sequential control system based on hard-wired transmission, characterized in that: The converter station sequential control system includes a converter station system and a master station system, and the converter station system includes a converter station DC monitoring subsystem and a converter station video monitoring subsystem; The converter station DC monitoring subsystem is used to send a first opening and closing state of a switch of a converter station device to the master station system; the first opening and closing state is obtained by monitoring by the converter station DC monitoring subsystem; The master station system is used to send a video image acquisition instruction to the converter station video monitoring subsystem; the video image acquisition instruction is generated in response to the first opening and closing state; the video image acquisition instruction is used to instruct the converter station video monitoring subsystem to obtain a second opening and closing state of the switch of the converter station equipment; the second opening and closing state is obtained by analyzing the video image information of the converter station equipment; The converter station video monitoring subsystem is used to transmit the second opening and closing state to the converter station DC monitoring subsystem through hard wiring.

2. The system according to claim 1, characterized in that The converter station system further includes a conversion device and a signal interface device, one end of the hard wiring is electrically connected to the converter station DC monitoring subsystem through the signal interface device, and the other end of the hard wiring is electrically connected to the converter station video monitoring subsystem through the conversion device; The converter station video monitoring subsystem is further used to convert the second opening and closing state into a target signal that conforms to the hard wiring transmission form through the conversion device, and transmit the target signal to the signal interface device of the converter station DC monitoring subsystem through the hard wiring; The converter station DC monitoring subsystem is further used to analyze the target signal through the signal interface device to obtain the second opening and closing state.

3. The system according to claim 1, characterized in that The master station system includes a master station monitoring subsystem and a master station operation support subsystem; The master station monitoring subsystem is used to generate a video image acquisition instruction according to the first opening and closing state, and send the video image acquisition instruction to the master station operation support subsystem; The main station operation support subsystem is used to forward the video image acquisition instruction to the converter station video monitoring subsystem.

4. The system according to claim 3, characterized in that The converter station DC monitoring subsystem is further used to send a remote signal and the first opening and closing state to the master station monitoring subsystem; the remote signal includes a target opening and closing state of the switch; the target opening and closing state is an opening and closing state that matches the current sequence; The master station monitoring subsystem is further configured to send the video image acquisition instruction to the master station operation support subsystem when it is determined that the first opening and closing state matches the target opening and closing state.

5. The system according to claim 4, characterized in that The converter station system further comprises a telecontrol device, which is used for remotely transmitting data between the converter station DC monitoring subsystem and the master station monitoring subsystem; The converter station DC monitoring subsystem is also used to send the telesignaling signal and the first opening and closing state to the master station monitoring subsystem through the telecontrol device and the dedicated area data network.

6. The system according to claim 4, characterized in that The main station operation support subsystem is used to send the video image acquisition instruction to the converter station video monitoring subsystem through a dedicated data line.

7. The system according to claim 3, characterized in that The master station system also includes an isolation device; the isolation device is used to isolate the data transmission channel between the master station monitoring subsystem and the master station operation support subsystem from unauthorized data access requests or unsafe networks.

8. The system according to claim 1, characterized in that The converter station DC monitoring subsystem is used to confirm that the switch of the converter station equipment has completed the opening and closing operation matching the current sequence when it is determined that the first opening and closing state and the second opening and closing state both meet the target state, and control the switch of the converter station equipment to perform the opening and closing operation matching the next sequence.

9. The system according to claim 1, characterized in that The converter station video monitoring subsystem is also used to extract features from the video image information to obtain state features of the switch, and determine the second open / close state of the switch based on the state features; the state features include the position, angle, and contour of the handle or contact of the switch in the video image information.

10. The system according to claim 1, characterized in that The converter station DC monitoring subsystem is also used to send a warning message to the master station system when it is determined that at least one of the first opening and closing state and the second opening and closing state does not meet the target state; the warning message is used to indicate that an abnormal situation has occurred in the converter station sequential control system.

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