Valve control device and method of hybrid commutation converter valve

Abstract

The invention provides a valve control device and method for a hybrid commutation converter valve, and relates to the technical field of high-voltage direct-current transmission, and the device comprises a turn-off case and a plurality of VCM cases. The turn-off case is in communication connection with the plurality of VCM cases; each VCM case is used for interacting with a corresponding single valve in a hybrid commutation converter valve and carrying out control and state monitoring on the single valve; the turn-off case is used for gathering full signals of the hybrid commutation converter valve and performing commutation state judgment, fault state identification and active turn-off feasibility analysis based on the full signals; and when a preset condition is met, an active turn-off command is generated and issued to the corresponding VCM case, and the VCM case forwards the active turn-off command to the corresponding single valve to execute an active turn-off operation.

Description

Technical Field

[0001] This invention relates to the field of high voltage direct current transmission technology, and more particularly to a valve control device and method for a hybrid phase-commutation converter valve. Background Technology

[0002] The HCC converter valve (hybrid phase-commutation converter valve) is a hybrid phase-commutation converter based on the fully controlled IGCT device. Its topology is similar to that of a traditional grid phase-commutation converter based on thyristor devices, both being six-pulse converter valve structures. The difference lies in the core device: the core device of a traditional grid phase-commutation converter is the thyristor, which can only be actively turned on and cannot be actively turned off, belonging to a semi-controlled device; while the core device of the HCC converter valve is the IGCT, which can be actively turned on and off.

[0003] Based on this, the HCC converter valve can force commutation by actively shutting down the IGCT device in case of commutation failure, thereby resisting commutation failure. Valve control is the core control device of the converter valve. Traditional thyristor valve control devices only need to send trigger pulses to the thyristors according to the conduction sequence of the six-pulse converter valve; HCC valve control, in addition to triggering the IGCT device, also needs to actively shut down the IGCT device, which is fundamentally different from traditional thyristor valve control. HCC valve control needs to achieve active shutdown of the IGCT device, and this process must not damage the converter valve and the IGCT device.

[0004] In summary, traditional valve control architectures cannot meet the requirements of HCC valve-controlled active shut-off, and there is some overlap in structure and function between HCC valve control and traditional valve control. Existing technologies also propose LCC valve control (conventional DC converter valve), but this method cannot meet the functional requirements of HCC converter valves.

[0005] Therefore, there is an urgent need for a technical solution that can overcome the above-mentioned defects, meet the HCC valve control design requirements, and realize the functional requirements of HCC converter valves. Summary of the Invention

[0006] To address the problems existing in the prior art, this invention proposes a valve control device and method for a hybrid commutation converter valve. This invention fulfills the requirement of active shut-off function of the HCC converter valve with the simplest topology, while reducing the complexity of the system equipment and improving the integration of the equipment.

[0007] In a first aspect of the present invention, a valve control device for a hybrid commutation valve is provided, the device comprising: a shutdown chassis; The shutdown chassis is communicatively connected to multiple VCM chassis; for each VCM chassis, it is used to interact with the corresponding single valve in the hybrid commutation valve to control and monitor the status of the single valve. The shutdown chassis is used to collect all signals from the hybrid commutation converter valves, and to perform commutation status judgment, fault status identification, and active shutdown feasibility analysis based on the all signals. When preset conditions are met, an active shutdown command is generated and sent to the corresponding VCM chassis, which then forwards it to the corresponding single valve to perform the active shutdown operation.

[0008] In a second aspect of the present invention, a valve control method for a hybrid commutator valve is provided, the valve control method being executed based on a valve control device for the hybrid commutator valve; wherein the method includes: The individual valves are controlled and their status monitored through interaction between each VCM chassis and the corresponding individual valves in the hybrid commutation valve. The shutdown chassis summarizes all signals collected by the hybrid commutation converter valves from the VCM chassis, and performs commutation status judgment, fault status identification, and active shutdown feasibility analysis based on the full signals. When preset conditions are met, an active shutdown command is generated and sent to the corresponding VCM chassis, which then forwards it to the corresponding single valve to perform the active shutdown operation.

[0009] The valve control device and method for hybrid commutation converter valves proposed in this invention constructs a collaborative architecture with multiple VCM chassis, external current acquisition equipment, and DC control and protection systems through a shutdown chassis. Combined with modular board design, high-speed optical communication channels, multi-channel redundant monitoring, full signal aggregation and analysis, multi-dimensional anomaly judgment logic, self-testing, and waveform recording functions, it not only achieves precise implementation of the active shutdown function of the hybrid commutation converter valve, effectively resisting abnormal conditions such as commutation failure and overcurrent, and protecting core components such as IGCT devices and surge arresters from damage, but also significantly improves the operational safety, stability, and reliability of the valve control device by minimizing modifications to the traditional valve control structure and optimizing signal transmission and processing efficiency. Simultaneously, it provides complete data support for fault tracing and architecture optimization, enhances the maintainability and fault handling efficiency of the device, and forms a multi-level, comprehensive converter valve protection system, providing strong technical support for high-voltage direct current transmission scenarios. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram showing the correspondence between the VCM chassis and the converter valve in a traditional valve-controlled scenario.

[0012] Figure 2This is a schematic diagram of the architecture of a traditional valve control system.

[0013] Figure 3 This is a schematic diagram of the valve control device architecture of a hybrid commutation valve according to an embodiment of the present invention.

[0014] Figure 4 This is a schematic diagram of a shutdown chassis architecture according to an embodiment of the present invention.

[0015] Figure 5 This is a schematic flowchart of a valve control method for a hybrid commutation valve according to an embodiment of the present invention. Detailed Implementation

[0016] The principles and spirit of the invention will now be described with reference to several exemplary embodiments. It should be understood that these embodiments are given merely to enable those skilled in the art to better understand and implement the invention, and are not intended to limit the scope of the invention in any way. Rather, these embodiments are provided to make this disclosure more thorough and complete, and to fully convey the scope of this disclosure to those skilled in the art.

[0017] Those skilled in the art will recognize that embodiments of the present invention can be implemented as a system, apparatus, device, method, or computer program product. Therefore, this disclosure can be specifically implemented in the following forms: entirely hardware, entirely software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.

[0018] According to an embodiment of the present invention, a valve control device and method for a hybrid phase-commutation converter valve are proposed, relating to the field of high-voltage direct current transmission technology.

[0019] In the embodiments of the present invention, the following terms need to be explained: HCC converter valve: Hybrid phase-commutation converter valve, the converter valve is a power transmission equipment.

[0020] IGCT: Fully controlled power device, integrated gate commutated thyristor.

[0021] The principles and spirit of the present invention will be explained in detail below with reference to several representative embodiments.

[0022] refer to Figure 1 This is a schematic diagram showing the correspondence between the VCM chassis and the converter valve in a traditional valve-controlled scenario. (Reference) Figure 2 This is a schematic diagram of the architecture of a traditional valve control system. Figure 1 and Figure 2As shown, traditional valve control equipment is divided into secondary interface chassis, converter valve device (thyristor) control and status monitoring chassis (VCM chassis), and auxiliary function chassis (including valve tower leakage monitoring and surge arrester energy monitoring) according to different functions. Because converter valves have a large number of thyristor devices, a single standard chassis cannot accommodate them all, so multiple VCM chassis are required. Typically, they are arranged in units of bridge arms. Taking the IDA phase bridge arm as an example, the corresponding "ID1" valve and "ID4" valve are arranged in the same VCM chassis. A twelve-pulse converter valve requires a total of six VCM chassis for its valve control equipment.

[0023] Specifically, in Figure 1 In this diagram, IDA, IDB, IDC, IYA, IYB, and IYC represent different phase bridge arms; ID4 and ID1 correspond to the IDA phase bridge arm, which is controlled and monitored through the VCM chassis (D4 / D1); ID6 and ID3 correspond to the IDB phase bridge arm, which is controlled and monitored through the VCM chassis (D6 / D3); ID2 and ID5 correspond to the IDC phase bridge arm, which is controlled and monitored through the VCM chassis (D2 / D5); IY4 and IY1 correspond to the IYA phase bridge arm, which is controlled and monitored through the VCM chassis (Y4 / Y1); IY6 and IY3 correspond to the IYB phase bridge arm, which is controlled and monitored through the VCM chassis (Y6 / Y3); and IY2 and IY5 correspond to the IYC phase bridge arm, which is controlled and monitored through the VCM chassis (Y2 / Y5). In other scenarios, a common anode or common cathode configuration is also used, where valves "ID1, ID3, and ID5" are arranged in the same VCM chassis. In this structure, a twelve-pulse converter valve is configured with four VCM chassis. That is, the valve control equipment for a twelve-pulse converter valve typically contains multiple VCM chassis, which do not interact with each other and independently control their respective individual valves.

[0024] The secondary interface chassis can adapt the signal interface between valve control equipment and external secondary systems (such as measurement and control, communication equipment); complete the conversion, isolation or transmission of secondary signals, and provide a stable signal input and output channel for core control units such as VCM chassis.

[0025] In practical applications, to achieve the active shutdown function of the hybrid commutation converter valve (HCC) and protect the converter valve and IGCT equipment, the HCC valve control needs to add current monitoring, converter valve fault status judgment, and valve commutation moment monitoring. Active shutdown is not performed during natural commutation. In the event of commutation failure, it is first determined whether active shutdown will lead to a deeper fault or IGCT device failure, and active shutdown is issued when the condition permits.

[0026] To address this issue, this invention proposes a valve control device for a hybrid commutation valve (HCC), which achieves active shutdown functionality through the addition of a separate shutdown chassis. (Reference) Figure 3 This is a schematic diagram of the valve control device architecture of a hybrid commutation valve according to an embodiment of the present invention. Figure 3 As shown, the device includes: a shutdown chassis; The shutdown chassis is communicatively connected to multiple VCM chassis; for each VCM chassis, it is used to interact with the corresponding single valve in the hybrid commutation valve to control and monitor the status of the single valve. The shutdown chassis is used to collect all signals from the hybrid commutation converter valves, and to perform commutation status judgment, fault status identification, and active shutdown feasibility analysis based on the all signals. When preset conditions are met, an active shutdown command is generated and sent to the corresponding VCM chassis, which then forwards it to the corresponding single valve to perform the active shutdown operation.

[0027] This invention achieves centralized collection and unified analysis of all signals from hybrid commutation converter valves by setting up a shutdown chassis and multiple VCM chassis to work together. It can accurately complete commutation status judgment, fault identification, and active shutdown feasibility assessment. When preset conditions are met, it can quickly issue an active shutdown command and forward it to the corresponding single valve through the VCM chassis. This solves the problem of traditional valve control lacking centralized active shutdown control, effectively avoids damage to converter valve components caused by fault expansion, and significantly improves the safety and stability of hybrid commutation converter valve operation.

[0028] exist Figure 2 and Figure 3 In the exemplary scenario, there are 6 VCM chassis, but in actual applications, the number can be other, and this invention does not specifically limit this. To realize the active shutdown function of HCC valve control, this invention proposes a separate chassis structure, namely the "shutdown chassis". Unlike the non-interactive nature of VCM chassis, this invention uses the shutdown chassis to aggregate and process all signals from the twelve-pulse converter valve. Specifically, the aggregated signals include at least the three-phase AC current on the AC side, DC bus current, neutral current, single valve current, the conduction control signal of the twelve-pulse converter valve, the commutation timing indication signal of the twelve-pulse converter valve, and the opening and closing commands of the twelve-pulse converter valve, etc., and the specific signal types are not limited to these. In the HCC valve control equipment, the shutdown chassis performs the above-mentioned active shutdown function aggregation and processing.

[0029] refer to Figure 4 This is a schematic diagram of a shutdown chassis architecture according to an embodiment of the present invention. Figure 4As shown, the shutdown chassis includes: a current acquisition board 110, a signal input board 120, a calculation board 130, and a signal output board 140; all boards are designed with FPGA chips, and the control cycle can reach the microsecond level, which meets the requirements of the HCC converter valve active shutdown function.

[0030] This invention modularizes the shutdown chassis into current acquisition boards, signal input boards, arithmetic boards, and signal output boards. These boards work together to achieve standardized and efficient processing of current signal reception, VCM chassis signal interaction, shutdown logic operations, and command issuance. This ensures the orderly transmission and operation of signals and improves the operational reliability and signal processing accuracy of the shutdown chassis, providing a solid hardware architecture support for the precise implementation of the active shutdown function.

[0031] The current acquisition board 110 is equipped with a communication interface for receiving multiple digital current signals provided by external current acquisition devices.

[0032] In one embodiment, the current acquisition board 110 acquires the digital input of an external current acquisition device through coded communication and filters the digital input; it performs real-time comparison and filtering of multiple redundant current acquisition signals at the same measurement point; when the deviation of one of the signals exceeds the limit, it issues an alarm and processes the alarm signal issued by the external current acquisition device, discarding or marking the abnormal current value.

[0033] Specifically, the current acquisition board 110 acquires digital input from external current acquisition devices via coded communication and has preliminary filtering logic for the digital input. In engineering implementation, each current measurement point is equipped with four sets of current acquisition devices. The current acquisition board 110 judges the four currents at the same measurement point in real time, and should issue an alarm when the current deviation of one of the currents significantly exceeds the limit. In addition to monitoring current data, the current acquisition board 110 also has the function of processing alarm signals from current acquisition devices. When an external current acquisition device issues an alarm, it discards the current value of that device or processes the alarm according to preset logic.

[0034] The current acquisition board uses coded communication to acquire digital signals and effectively filters abnormal current data through real-time comparison of multiple redundant current signals, deviation alarms, and abnormal signal processing mechanisms. This ensures the accuracy and reliability of the current signal, avoids misjudgment of the active shutdown logic caused by erroneous current data, provides high-quality input signals for the accurate judgment of the computing board, and improves the reliability of active shutdown control.

[0035] The signal input board 120 is used to receive signals from the plurality of VCM chassis, wherein the signals include at least a single valve fault alarm, a control pulse signal, a commutation angle signal, a trigger pulse, and a shutdown feedback signal.

[0036] In one embodiment, the signal input board 120 interacts with each of the VCM chassis; the VCM chassis interacts with the corresponding single valve, and after determining that the number of single valve failures exceeds the limit, it sends an alarm message to the signal input board 120; the shutdown chassis processes the alarm message accordingly and stops the active shutdown function. The VCM chassis sends the control pulse signal, commutation angle signal, trigger pulse and shutdown feedback signal of the corresponding single valve to the signal input board 120. The signal input board 120 sends the signal to the computing board 130, which processes the signals of all single valves, determines whether the converter valve is abnormal, and issues an active shutdown command or alarm when the converter valve is abnormal.

[0037] Through bidirectional signal interaction between the signal input board and each VCM chassis, the linkage control of single valve fault alarm and active shutdown functions is realized (active shutdown stops when the fault exceeds the limit). At the same time, key signals such as control pulses, commutation angles, and trigger pulses of single valves are collected comprehensively, providing comprehensive status input to the computing board. This ensures that the computing board can accurately judge the overall operating status of the converter valve, realize targeted shutdown or alarm under abnormal conditions, avoid fault propagation, and improve the response sensitivity of the valve control device to the status of single valves.

[0038] The computing board 130 is connected to the current acquisition board 110 and the signal input board 120, and is used to execute a preset active shutdown judgment logic based on all received signals.

[0039] The arithmetic board 130 receives all signals from the current board and the signal input board 120, and performs relevant judgments and alarms for active shutdown in the programmable logic device according to the preset strategy.

[0040] The computing board 130 is configured to execute at least one of the following decision logics: The system determines whether the current exceeds the set value based on the received current signal, and issues an overcurrent alarm when the current exceeds the set value. Monitor the rate of change of bridge arm current and combine it with the commutation angle indication signal to determine whether commutation failure has occurred, and generate an active shutdown command when commutation failure occurs; Determine whether there is an additional branch or a pre-opened branch that has not been opened inside the converter valve, and issue a fault alarm when a fault occurs; The conduction status of the bridge arm is determined by controlling the pulse signal, trigger pulse and turn-off feedback signal. When the bridge arm conduction is abnormal, an active turn-off command or alarm is issued. After the active shutdown pulse is issued, the stress of the converter valve is judged based on the current change of the corresponding single valve, and the status of the converter valve is indirectly monitored, including the energy accumulation of the surge arrester and the junction temperature of the IGCT device at the time when it should be shut down. When the status of the converter valve is abnormal, an active shutdown command or alarm is issued.

[0041] Furthermore, the computing board 130 is communicatively connected to the DC control and protection system, providing real-time feedback on alarm status and active shutdown status, and notifying the DC control and protection system to intervene in case of an anomaly.

[0042] The computing board integrates a variety of targeted active shutdown judgment logics, covering core scenarios such as overcurrent monitoring, commutation failure identification, internal fault judgment, bridge arm conduction status detection, and stress monitoring after shutdown. It realizes multi-dimensional and all-round monitoring of abnormal operation of the hybrid commutation converter valve, ensuring that shutdown commands or alarms can be issued in a timely manner under different abnormal operating conditions, minimizing the risk of damage to core components such as converter valve IGCT devices and surge arresters, and further strengthening the operation protection of the converter valve.

[0043] The signal output board 140 is connected to the computing board 130 and the VCM chassis, and is used to send the generated active shutdown command to the corresponding VCM chassis.

[0044] Specifically, an optical communication interface can be used to connect the shutdown chassis to the DC control and protection system. By leveraging the advantages of optical communication, such as strong anti-electromagnetic interference capability and high transmission rate, the real-time and accurate reception of control commands and status feedback are ensured. This effectively avoids communication delays or signal distortions caused by electromagnetic interference, guarantees the stability of communication between upper and lower level systems, and provides reliable communication support for rapid response under abnormal operating conditions.

[0045] Further reference Figure 4 The shutdown chassis also includes: a waveform recording board 150; The waveform recording board 150 is communicatively connected to the current acquisition board 110, the signal input board 120, the arithmetic board 130, and the signal output board 140, and is used to record the input and output signals of the shutdown chassis.

[0046] Specifically, the sampling rate of the waveform recording board 150 supports changes in the input and output signals of the input shutdown chassis.

[0047] By adding a waveform recording board and establishing communication with the functional boards in the shutdown chassis, the full-process waveform recording of all input and output signals of the shutdown chassis is realized. This provides complete data support for subsequent fault tracing, anomaly cause analysis and system optimization, greatly improving the maintainability and troubleshooting efficiency of the valve control device, and helping to quickly locate the root cause of the fault and optimize the active shutdown logic.

[0048] The shutdown chassis can be connected to the DC control and protection system via an optical communication interface to receive control commands and provide real-time feedback on alarm status and active shutdown status.

[0049] The shutdown chassis is also used to perform self-tests on its internal functions, and when it detects a fault, it issues an alarm and stops issuing active shutdown commands.

[0050] The shutdown chassis has an internal self-test function, which can monitor its own operating status in real time. When a fault is detected, it will issue an alarm in time and stop issuing active shutdown commands. This effectively avoids the problem of false shutdown or shutdown failure caused by the shutdown chassis itself, improves the self-protection capability and operational reliability of the valve control device, and prevents the fault from escalating and causing secondary damage to the converter valve system.

[0051] In one specific embodiment, the chassis is turned off to add an interface for the current acquisition device. This interface needs to have a high-speed communication channel, which can be an optical signal interface for communication transmission.

[0052] When the shutdown chassis determines that it can issue an active shutdown command, it needs to send the command to each VCM, and then the VCM chassis will send the control command to the HCC converter valve in an agreed manner.

[0053] The VCM chassis interacts directly with the converter valve to determine the device status of the converter valve and feeds the result back to the shutdown chassis.

[0054] The shutdown chassis adds an interface with the DC control and protection system. This interface has a high-speed communication channel, specifically an optical signal interface for communication transmission.

[0055] The shutdown chassis has an internal self-test function, which can issue corresponding alarms and stop issuing active shutdown commands when it malfunctions.

[0056] The shutdown chassis is equipped with a high-speed waveform recording device, which can record all signals input and output to the chassis.

[0057] It should be noted that although several modules of the valve control device for the hybrid commutation valve have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of the invention, the features and functions of two or more modules described above can be embodied in a single module. Conversely, the features and functions of a single module described above can be further divided and embodied by multiple modules.

[0058] Having described the apparatus according to exemplary embodiments of the present invention, the following references are made to... Figure 5 The valve control method of the hybrid commutation valve according to an exemplary embodiment of the present invention will be described.

[0059] Figure 5 This is a schematic flowchart of a valve control method for a hybrid commutation valve according to an embodiment of the present invention. Figure 5 As shown, this valve control method is executed based on the valve control device of the hybrid commutation valve; wherein, the method includes: S101, through interaction between each VCM chassis and the corresponding single valve in the hybrid commutation valve, the single valve is controlled and its status is monitored; S102, The shutdown chassis summarizes all signals of the hybrid commutation converter valve collected by the VCM chassis, and performs commutation status judgment, fault status identification and active shutdown feasibility analysis based on the full signals. S103, when the preset conditions are met, an active shutdown command is generated and sent to the corresponding VCM chassis, which then forwards it to the corresponding single valve to perform the active shutdown operation.

[0060] The implementation of the valve control method for the hybrid commutation valve can be found in the principle and implementation process of the above-mentioned device, and will not be repeated here.

[0061] It should be noted that although the operation of the method of the present invention has been described in a specific order in the above embodiments and figures, this does not require or imply that the operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0062] Compared with the prior art, the present invention makes improvements in at least the following aspects: This invention introduces a new shutdown chassis architecture design, achieving minimal modifications between HCC valve control equipment and traditional valve control equipment, thereby improving the reliability and maintainability of HCC valve control. All logic and interfaces related to the active shutdown function requirement of the HCC converter valve are located inside the shutdown chassis. Traditional VCM chassis structures only need to handle signal forwarding and do not involve the active shutdown function of the HCC converter valve.

[0063] The shutdown chassis fulfills the requirement for active shutdown of the HCC converter valve and monitors its operating status in real time, providing protection against internal valve faults. The shutdown chassis is equipped with an interface for an external current acquisition device, enabling high-speed communication to acquire current at the converter valve's measurement points. Changes to the current measurement points and current acquisition device do not affect the shutdown chassis design. Input / output channels are configured between the shutdown chassis and the VCM chassis, allowing active shutdown commands to be sent to the converter valve in real time via the VCM chassis. When the VCM chassis detects a converter valve fault, it receives an alarm immediately. Direct communication between the shutdown chassis and the DC control and protection device minimizes control link delays. In the event of a shutdown chassis malfunction, the DC protection system can immediately switch the operating modes of the converter valve and the DC system. The shutdown chassis also features high-speed waveform recording capabilities.

[0064] The valve control device and method for hybrid commutation converter valves proposed in this invention constructs a collaborative architecture with multiple VCM chassis, external current acquisition equipment, and DC control and protection systems through a shutdown chassis. Combined with modular board design, high-speed optical communication channels, multi-channel redundant monitoring, full signal aggregation and analysis, multi-dimensional anomaly judgment logic, self-testing, and waveform recording functions, it not only achieves precise implementation of the active shutdown function of the hybrid commutation converter valve, effectively resisting abnormal conditions such as commutation failure and overcurrent, and protecting core components such as IGCT devices and surge arresters from damage, but also significantly improves the operational safety, stability, and reliability of the valve control device by minimizing modifications to the traditional valve control structure and optimizing signal transmission and processing efficiency. Simultaneously, it provides complete data support for fault tracing and architecture optimization, enhances the maintainability and fault handling efficiency of the device, and forms a multi-level, comprehensive converter valve protection system, providing strong technical support for high-voltage direct current transmission scenarios.

[0065] The acquisition, storage, use, and processing of data in the technical solution of this invention all comply with the relevant provisions of laws and regulations.

[0066] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, apparatus, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0067] This invention is described with reference to flowchart illustrations and / or block diagrams of methods and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0068] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0069] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0070] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A valve control device for a hybrid commutation valve, characterized in that, The device includes: a shutdown chassis; The shutdown chassis is communicatively connected to multiple VCM chassis; for each VCM chassis, it is used to interact with the corresponding single valve in the hybrid commutation valve to control and monitor the status of the single valve. The shutdown chassis is used to collect all signals from the hybrid commutation converter valves, and to perform commutation status judgment, fault status identification, and active shutdown feasibility analysis based on the all signals. When preset conditions are met, an active shutdown command is generated and sent to the corresponding VCM chassis, which then forwards it to the corresponding single valve to perform the active shutdown operation.

2. The valve control device for the hybrid commutation valve according to claim 1, characterized in that, The shutdown chassis includes: a current acquisition board, a signal input board, a processing board, and a signal output board; wherein... The current acquisition board is equipped with a communication interface for receiving multiple digital current signals provided by external current acquisition devices. The signal input board is used to receive signals from the plurality of VCM chassis, wherein the signals include at least a single valve fault alarm, a control pulse signal, a commutation angle signal, a trigger pulse, and a shutdown feedback signal; The computing board is connected to the current acquisition board and the signal input board, and is used to execute a preset active shutdown judgment logic based on all received signals. The signal output board is connected to the computing board and the VCM chassis, and is used to send the generated active shutdown command to the corresponding VCM chassis.

3. The valve control device for the hybrid commutation valve according to claim 2, characterized in that, The shutdown chassis also includes: a waveform recording board; The waveform recording board is communicatively connected to the current acquisition board, signal input board, arithmetic board, and signal output board, and is used to record the input and output signals of the shutdown chassis.

4. The valve control device for the hybrid commutation valve according to claim 2, characterized in that, The current acquisition board acquires digital input from external current acquisition devices via coded communication and filters the digital input; it also performs real-time comparison and filtering of multiple redundant current acquisition signals at the same measurement point. An alarm is issued when the deviation of one of the signals exceeds the limit, and the alarm signal issued by the external current acquisition device is processed to discard or mark the abnormal current value.

5. The valve control device for the hybrid commutation valve according to claim 2, characterized in that, The signal input board interacts with each of the VCM chassis; the VCM chassis interacts with the corresponding single valve, and after determining that the number of single valve failures exceeds the limit, it sends an alarm message to the signal input board; the shutdown chassis processes the alarm message accordingly and stops the active shutdown function. The VCM chassis sends the control pulse signal, commutation angle signal, trigger pulse and shutdown feedback signal of the corresponding single valve to the signal input board. The signal input board sends the signal to the computing board, which processes the signals of all single valves to determine whether the converter valve is abnormal. When the converter valve is abnormal, it issues an active shutdown command or alarm.

6. The valve control device for the hybrid commutation valve according to claim 2, characterized in that, The computing board is configured to execute at least one of the following decision logics: The system determines whether the current exceeds the set value based on the received current signal, and issues an overcurrent alarm when the current exceeds the set value. Monitor the rate of change of bridge arm current and combine it with the commutation angle indication signal to determine whether commutation failure has occurred, and generate an active shutdown command when commutation failure occurs; Determine whether there is an additional branch or a pre-opened branch that has not been opened inside the converter valve, and issue a fault alarm when a fault occurs; The conduction status of the bridge arm is determined by controlling the pulse signal, trigger pulse and turn-off feedback signal. When the conduction of the bridge arm is abnormal, an active turn-off command or alarm is issued. After the active shutdown pulse is issued, the stress of the converter valve is judged based on the current change of the corresponding single valve, and the status of the converter valve is indirectly monitored, including the energy accumulation of the surge arrester and the junction temperature of the IGCT device at the time when it should be shut down. When the status of the converter valve is abnormal, an active shutdown command or alarm is issued.

7. The valve control device for the hybrid commutation valve according to claim 4, characterized in that, The computing board is connected to the DC control and protection system, providing real-time feedback on alarm status and active shutdown status, and notifying the DC control and protection system to intervene in case of an anomaly.

8. The valve control device for the hybrid commutation valve according to claim 1, characterized in that, The shutdown chassis is connected to the DC control and protection system via an optical communication interface to receive control commands and provide real-time feedback on alarm status and active shutdown status.

9. The valve control device for the hybrid commutation valve according to claim 1, characterized in that, The shutdown chassis is also used to perform self-tests on its internal functions, and when it detects a fault, it issues an alarm and stops issuing active shutdown commands.

10. A valve control method for a hybrid commutation valve, characterized in that, The valve control method is performed based on the valve control device of the hybrid commutation valve according to any one of claims 1 to 9; wherein the method includes: The individual valves are controlled and their status monitored through interaction between each VCM chassis and the corresponding individual valves in the hybrid commutation valve. The shutdown chassis summarizes all signals collected by the hybrid commutation converter valves from the VCM chassis, and performs commutation status judgment, fault status identification, and active shutdown feasibility analysis based on the full signals. When preset conditions are met, an active shutdown command is generated and sent to the corresponding VCM chassis, which then forwards it to the corresponding single valve to perform the active shutdown operation.

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