A redundant trigger link inspection device and method for a turn-off current source converter valve

Abstract

The application relates to the technical field of power electronic conversion, and particularly provides a redundant trigger link inspection device and method for a turn-off current source converter valve, which comprises a valve control system, a first optical splitter, a second optical splitter and a high-level board card of a turn-off current source converter valve; the high-level board card of the turn-off current source converter valve is used for monitoring a detection signal receiving state signal of the turn-off current source converter valve, and the monitored detection signal receiving state signal of the turn-off current source converter valve is transmitted back to the valve control system through the second optical splitter; the valve control system is used for transmitting a detection signal to the high-level board card of the turn-off current source converter valve through the first optical splitter according to a CP signal issued by a pole control system, and performing trigger link detection on the turn-off current source converter valve according to the detection signal receiving state signal transmitted back by the high-level board card of the turn-off current source converter valve. The technical scheme provided by the application provides a powerful guarantee for the reliability improvement and safe operation of the converter valve.

Description

Technical Field

[0001] This invention relates to the field of power electronic converter technology, specifically to a device and method for inspecting redundant trigger links of a switchable current source converter valve. Background Technology

[0002] High-voltage direct current (HVDC) transmission technology, with its advantages of high transmission voltage, large transmission capacity, and low line loss, has become an important means of long-distance power transmission and a crucial foundation for ensuring the safe and stable operation of the power grid and the reliable supply of electricity. However, HVDC transmission technology based on traditional line-commutated converters suffers from the chronic problem of commutation failure. Failures can lead to a sharp drop in power, easily causing DC blocking, system instability, and a chain reaction of continuous commutation failures on multiple DC lines. To address the commutation failure problem, several circuit topologies or control strategies have been proposed. For example, HVDC transmission technology based on a switchable current source converter valve can completely solve the commutation failure problem through a hybrid connection of fully / semi-controlled devices, and this has been demonstrated in engineering applications at the Shanghai Nanqiao converter station.

[0003] However, the current shut-off current source converter valve and valve control still use the traditional "point-to-point" communication method. The converter valve communication interface of the hardware circuit of the valve control equipment is still a single design. For example, patent CN 202510336781 "A Completely Redundant Triggering Device and Method for Ultra-High Voltage Direct Current Transmission Converter Valve" proposes a redundant triggering configuration scheme for high voltage direct current transmission converter valve. The trigger link inspection of this scheme requires the direct transmission of the optical fiber of the valve control through the trigger splitter, which has the defects of difficult splitter design and excessive number of optical fibers. Summary of the Invention

[0004] To overcome the above-mentioned defects, this invention proposes a device and method for inspecting redundant trigger links of a current source converter valve that can be turned off.

[0005] In a first aspect, a redundant trigger link inspection device for a turn-off current source converter valve is provided, the turn-off current source converter valve redundant trigger link inspection device comprising: a valve control system, a first beam splitter, a second beam splitter, and a high-level board for the turn-off current source converter valve. The high-level board of the shut-off current source converter valve is used to monitor the detection signal reception status signal of the shut-off current source converter valve, and transmit the monitored detection signal reception status signal of the shut-off current source converter valve back to the valve control system through the second beam splitter. The valve control system is used to send a detection signal to the high-level board of the shut-off current source converter valve through the first optical splitter according to the CP signal issued by the polar control system, and to receive the status signal based on the detection signal returned by the high-level board of the shut-off current source converter valve to perform trigger link detection on the shut-off current source converter valve.

[0006] Preferably, the first beam splitter is a 2-to-N beam splitter, and the second beam splitter is a 1-to-2 beam splitter, wherein N is the number of converter valves directly connected in series on the high-level board of the switchable current source converter valve.

[0007] Preferably, the valve control system includes: the valve control system includes a main control board A and a main control board B, an interactive optical fiber is provided between the main control board A and the main control board B, each main control board is connected to a first optical splitter through its corresponding trigger board, and each main control board is connected to a second optical splitter through its corresponding monitoring board.

[0008] Furthermore, the trigger board is used to convert the detection signal output by its corresponding main control board into an optical signal and then output it to the first beam splitter; the monitoring board is used to photoelectrically convert and decode the detection signal received from the high-level board of the switchable current source converter valve and then output it to its corresponding main control board.

[0009] Furthermore, the main control board A is used to send a 1MHz frequency signal to the high-level board of the shut-off current source converter valve during the effective period of the CP signal issued by the extreme control system. If the 1MHz frequency signal received by the high-level board of the shut-off current source converter valve within the first preset time is received, then the trigger link of the shut-off current source converter valve is normal; otherwise, the trigger link of the shut-off current source converter valve is abnormal.

[0010] Furthermore, the main control board A is used to send a 1kHz idle pulse signal to the high-level board of the shut-off current source converter valve, and send a patrol start signal to the main control board B before the next CP signal arrives and when the 1kHz idle pulse signal does not emit an optical signal. The main control board B is used to send a 100kHz frequency signal to the high-level board of the shut-off current source converter valve after receiving the inspection start signal. If the 100kHz frequency signal received by the high-level board of the shut-off current source converter valve within the first preset time is received, then the triggering link of the shut-off current source converter valve is normal; otherwise, the triggering link of the shut-off current source converter valve is abnormal.

[0011] Furthermore, the main control board A is used to send a 1kHz idle pulse signal to the high-level board of the shut-off current source converter valve during the invalid period of the CP signal sent by the extreme control system, and to send a 100kHz frequency signal to the high-level board of the shut-off current source converter valve at preset intervals when the 1kHz idle pulse signal does not emit an optical signal. If the reception status of the 100kHz frequency signal returned by the high-level board of the shut-off current source converter valve within the first preset time is "received", then the triggering link of the shut-off current source converter valve is normal; otherwise, the triggering link of the shut-off current source converter valve is abnormal.

[0012] Furthermore, the main control board A is used to send a patrol start signal to the main control board B after a preset delay time, at the moment when the 1kHz idle pulse signal does not emit an optical signal; The main control board B is used to send a 100kHz frequency signal to the high-level board of the shut-off current source converter valve after receiving the inspection start signal. If the 100kHz frequency signal received by the high-level board of the shut-off current source converter valve within the first preset time is received, then the triggering link of the shut-off current source converter valve is normal; otherwise, the triggering link of the shut-off current source converter valve is abnormal.

[0013] Furthermore, the first preset time is 100μs.

[0014] Furthermore, the preset interval time is 20ms.

[0015] Secondly, a method for inspecting redundant trigger links of a turn-off current source converter valve is provided, the method comprising: The high-level board of the shut-off current source converter valve monitors the detection signal reception status signal of the shut-off current source converter valve and transmits the monitored detection signal reception status signal of the shut-off current source converter valve back to the valve control system through the second beam splitter. The valve control system sends a detection signal to the high-level board of the shut-off current source converter valve through the first optical splitter based on the CP signal issued by the polar control system, and performs trigger link detection on the shut-off current source converter valve based on the detection signal returned by the high-level board of the shut-off current source converter valve and the status signal received.

[0016] Thirdly, a computer device is provided, comprising: one or more processors; The processor is used to execute one or more programs; When the one or more programs are executed by the one or more processors, the method for implementing the redundant trigger link inspection device for the shut-off current source converter valve is realized.

[0017] Fourthly, a computer-readable storage medium is provided having a computer program stored thereon, wherein when the computer program is executed, a method for implementing the redundant trigger link inspection device for the shut-off current source converter valve is provided.

[0018] The above-described technical solutions of the present invention have at least one or more of the following beneficial effects: This invention provides a redundant trigger link inspection device and method for a turn-off current source converter valve, comprising: a valve control system, a first beam splitter, a second beam splitter, and a high-level board for the turn-off current source converter valve; the high-level board for the turn-off current source converter valve is used to monitor the detection signal reception status signal of the turn-off current source converter valve, and transmit the monitored detection signal reception status signal of the turn-off current source converter valve back to the valve control system through the second beam splitter; the valve control system is used to send a detection signal to the high-level board for the turn-off current source converter valve through the first beam splitter according to the CP signal issued by the polar control system, and to perform trigger link detection on the turn-off current source converter valve according to the detection signal reception status signal transmitted back by the high-level board for the turn-off current source converter valve. The technical solution provided by this invention determines the operating condition of the shut-off current source converter valve based on the CP signal issued by the polar control system. The solution involves the locking and unlocking conditions of the novel shut-off current source converter valve, taking into account all aspects. At the same time, this invention does not affect the normal control and protection of the converter valve. It completes the alternating inspection of the valve control redundancy trigger link during the idle time of the control command, and makes full use of the time coordination between the valve control downlink command and the high-potential board return status for link verification, reducing the number of inspection optical fibers. It is suitable for newly built or technically upgraded high-voltage direct current transmission projects. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the main structure of the redundant triggering link inspection device for the turn-off current source converter valve according to an embodiment of the present invention. Figure 2 This is a waveform diagram of redundant trigger link inspection during the converter valve unlocking stage according to an embodiment of the present invention. Figure 3 This is a waveform diagram of redundant trigger link inspection during the converter valve lockout stage according to an embodiment of the present invention. Detailed Implementation

[0020] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1 See appendix Figure 1 , Figure 1 This is a schematic diagram of the main structure of a redundant triggering link inspection device for a turn-off current source converter valve according to an embodiment of the present invention. Figure 1 As shown, the redundant trigger link inspection device for the turn-off current source converter valve in this embodiment of the invention mainly includes: a valve control system, a first beam splitter, a second beam splitter, and a high-level board for the turn-off current source converter valve. The high-level board of the shut-off current source converter valve is used to monitor the detection signal reception status signal of the shut-off current source converter valve, and transmit the monitored detection signal reception status signal of the shut-off current source converter valve back to the valve control system through the second beam splitter. The valve control system is used to send a detection signal to the high-level board of the shut-off current source converter valve through the first optical splitter according to the CP signal issued by the polar control system, and to receive the status signal based on the detection signal returned by the high-level board of the shut-off current source converter valve to perform trigger link detection on the shut-off current source converter valve.

[0023] The high-potential board receives the downlink signal distributed by the optical splitter, periodically uploads the status of the received downlink signal and its own fault information, and reports this information back to the valve-controlled optical splitter via optical fiber. The typical design for the high-potential board's return cycle is 25μs.

[0024] In this embodiment, the first beam splitter is a 2-to-N beam splitter, and the second beam splitter is a 1-to-2 beam splitter, where N is the number of converter valves directly connected in series on the high-level board of the switchable current source converter valve. The beam splitter distributes the valve-controlled trigger signal to each semiconductor device directly connected in series with the converter valve. A typical design is a 2-to-16 beam splitter, which has two inputs (connected to valve-controlled trigger board A and trigger board B respectively), and divides the signal into 16 parts before connecting them to 16 stages of IGBTs or thyristors directly connected in series.

[0025] In this embodiment, the valve control system includes: the valve control system includes a main control board A and a main control board B, an interactive optical fiber is provided between the main control board A and the main control board B, each main control board is connected to a first optical splitter through its corresponding trigger board, and each main control board is connected to a second optical splitter through its corresponding monitoring board.

[0026] In one embodiment, the trigger board is used to convert the detection signal output by its corresponding main control board into an optical signal and then output it to the first beam splitter; the monitoring board is used to photoelectrically convert and decode the detection signal received from the high-level board of the switchable current source converter valve and then output it to its corresponding main control board.

[0027] In one embodiment, the main control board A is used to send a 1MHz frequency signal to the high-level board of the shut-off current source converter valve during the effective period of the CP signal issued by the extreme control system. If the 1MHz frequency signal received by the high-level board of the shut-off current source converter valve within a first preset time is received, then the triggering link of the shut-off current source converter valve is normal; otherwise, the triggering link of the shut-off current source converter valve is abnormal.

[0028] In one embodiment, the main control board A is used to send a 1kHz idle pulse signal to the high-level board of the shut-off current source converter valve, and send a patrol start signal to the main control board B before the next CP signal arrives and when the 1kHz idle pulse signal does not emit an optical signal. The main control board B is used to send a 100kHz frequency signal to the high-level board of the shut-off current source converter valve after receiving the inspection start signal. If the 100kHz frequency signal received by the high-level board of the shut-off current source converter valve within the first preset time is received, then the triggering link of the shut-off current source converter valve is normal; otherwise, the triggering link of the shut-off current source converter valve is abnormal.

[0029] In one embodiment, the main control board A is used to send a 1kHz idle pulse signal to the high-level board of the shut-off current source converter valve during the invalid period of the CP signal sent by the extreme control system, and to send a 100kHz frequency signal to the high-level board of the shut-off current source converter valve at preset intervals when the 1kHz idle pulse signal does not emit an optical signal. If the reception status of the 100kHz frequency signal returned by the high-level board of the shut-off current source converter valve within the first preset time is "received", then the triggering link of the shut-off current source converter valve is normal; otherwise, the triggering link of the shut-off current source converter valve is abnormal.

[0030] In one embodiment, the main control board A is used to send a patrol start signal to the main control board B after a preset delay time, at a moment when the 1kHz idle pulse signal does not emit an optical signal; The main control board B is used to send a 100kHz frequency signal to the high-level board of the shut-off current source converter valve after receiving the inspection start signal. If the 100kHz frequency signal received by the high-level board of the shut-off current source converter valve within the first preset time is received, then the triggering link of the shut-off current source converter valve is normal; otherwise, the triggering link of the shut-off current source converter valve is abnormal.

[0031] In one implementation, the first preset time is 100 μs.

[0032] In one implementation, the preset interval time is 20ms.

[0033] In one specific embodiment, the present invention provides a valve control redundancy trigger link inspection method under the condition of converter valve unlocking. The redundancy trigger link inspection waveform during the converter valve unlocking stage is as follows: Figure 2 As shown, specifically: Under unlocked conditions, main control board A sends a 1MHz frequency signal to the high-potential board during the CP active period. While sending the 1MHz trigger signal, main control board A observes whether the high-potential board returns the trigger status within 100μs; this serves as the inspection result of the main control board A's trigger link.

[0034] After the triggering ends, main control board A sends a 1kHz idle pulse signal (representing no triggering of the thyristor / IGBT), and near the agreed time when the 1kHz pulse does not emit an optical signal, it sends a patrol start signal to main control board B. Main control board B then uses this signal as the starting point to send a 100kHz patrol signal to the high-potential board. Figure 2 The system detects whether the high-potential board receives and transmits the inspection status within a 100μs time range (the "trigger B" pulse signal in the main control board), and uses this as the status inspection result of the trigger link of the main control board B.

[0035] Note: A 100kHz frequency signal superimposed at a 1kHz non-emitting moment can be successfully superimposed and output to the high-potential board and recognized by the high-potential board. Figure 2 (The "trigger" pulse signal in the text).

[0036] In one specific embodiment, the present invention provides a valve control redundancy trigger link inspection method under the converter valve lock-up state, wherein the redundancy trigger link inspection waveform during the converter valve lock-up stage is as follows: Figure 3 As shown, specifically: Under locked conditions, the CP signal sent by the polar controller is always invalid. The main control board A continuously sends a 1kHz idle pulse signal to the high-potential board. It is agreed that every certain period of time (such as 20ms) during the period when the 1kHz pulse signal does not emit light, a 100kHz frequency signal will be sent for a period of time as the trigger link inspection signal of the main control board A. The judgment interval is the same as that when unlocking, which is 100μs.

[0037] After the valve control system A completes its inspection, it delays for a period of time and sends a start inspection command to the main control board B when the 1kHz frequency signal is not emitted. The main control board B then uses this signal as a starting point to send a 100kHz inspection signal to the high-potential board and checks within a 100μs time range whether the high-potential board receives and returns the inspection status. This status inspection result is used as the trigger link status inspection result of the main control board B.

[0038] Example 2 Based on the same inventive concept, this invention also provides a method for inspecting the redundant trigger link of the switchable current source converter valve, the method comprising: The high-level board of the shut-off current source converter valve monitors the detection signal reception status signal of the shut-off current source converter valve and transmits the monitored detection signal reception status signal of the shut-off current source converter valve back to the valve control system through the second beam splitter. The valve control system sends a detection signal to the high-level board of the shut-off current source converter valve through the first optical splitter based on the CP signal issued by the polar control system, and performs trigger link detection on the shut-off current source converter valve based on the detection signal returned by the high-level board of the shut-off current source converter valve and the status signal received.

[0039] Preferably, the valve control system includes: the valve control system includes a main control board A and a main control board B, an interactive optical fiber is provided between the main control board A and the main control board B, each main control board is connected to a first optical splitter through its corresponding trigger board, and each main control board is connected to a second optical splitter through its corresponding monitoring board.

[0040] Furthermore, the trigger board is used to convert the detection signal output by its corresponding main control board into an optical signal and then output it to the first beam splitter; the monitoring board is used to photoelectrically convert and decode the detection signal received from the high-level board of the switchable current source converter valve and then output it to its corresponding main control board.

[0041] Furthermore, the main control board A is used to send a 1MHz frequency signal to the high-level board of the shut-off current source converter valve during the effective period of the CP signal issued by the extreme control system. If the 1MHz frequency signal received by the high-level board of the shut-off current source converter valve within the first preset time is received, then the trigger link of the shut-off current source converter valve is normal; otherwise, the trigger link of the shut-off current source converter valve is abnormal.

[0042] Furthermore, the main control board A is used to send a 1kHz idle pulse signal to the high-level board of the shut-off current source converter valve, and send a patrol start signal to the main control board B before the next CP signal arrives and when the 1kHz idle pulse signal does not emit an optical signal. The main control board B is used to send a 100kHz frequency signal to the high-level board of the shut-off current source converter valve after receiving the inspection start signal. If the 100kHz frequency signal received by the high-level board of the shut-off current source converter valve within the first preset time is received, then the triggering link of the shut-off current source converter valve is normal; otherwise, the triggering link of the shut-off current source converter valve is abnormal.

[0043] Furthermore, the main control board A is used to send a 1kHz idle pulse signal to the high-level board of the shut-off current source converter valve during the invalid period of the CP signal sent by the extreme control system, and to send a 100kHz frequency signal to the high-level board of the shut-off current source converter valve at preset intervals when the 1kHz idle pulse signal does not emit an optical signal. If the reception status of the 100kHz frequency signal returned by the high-level board of the shut-off current source converter valve within the first preset time is "received", then the triggering link of the shut-off current source converter valve is normal; otherwise, the triggering link of the shut-off current source converter valve is abnormal.

[0044] Furthermore, the main control board A is used to send a patrol start signal to the main control board B after a preset delay time, at the moment when the 1kHz idle pulse signal does not emit an optical signal; The main control board B is used to send a 100kHz frequency signal to the high-level board of the shut-off current source converter valve after receiving the inspection start signal. If the 100kHz frequency signal received by the high-level board of the shut-off current source converter valve within the first preset time is received, then the triggering link of the shut-off current source converter valve is normal; otherwise, the triggering link of the shut-off current source converter valve is abnormal.

[0045] Furthermore, the first preset time is 100μs.

[0046] Furthermore, the preset interval time is 20ms.

[0047] Example 3 Based on the same inventive concept, this invention also provides a computer device, which includes a processor and a memory. The memory stores a computer program, which includes program instructions. The processor executes the program instructions stored in the computer storage medium. The processor may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. It is the computing and control core of the terminal, suitable for implementing one or more instructions, specifically suitable for loading and executing one or more instructions in the computer storage medium to implement corresponding method flows or corresponding functions, thereby implementing the steps of the method for a redundant trigger link inspection device for a current source converter valve in the above embodiments.

[0048] Example 4 Based on the same inventive concept, this invention also provides a storage medium, specifically a computer-readable storage medium (Memory), which is a memory device in a computer device used to store programs and data. It is understood that the computer-readable storage medium here can include both the built-in storage medium in the computer device and extended storage media supported by the computer device. The computer-readable storage medium provides storage space that stores the terminal's operating system. Furthermore, this storage space also stores one or more instructions suitable for loading and execution by a processor. These instructions can be one or more computer programs (including program code). It should be noted that the computer-readable storage medium here can be high-speed RAM or non-volatile memory, such as at least one disk storage device. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the steps of the method for a redundancy trigger link inspection device for a current source converter valve in the above embodiments.

[0049] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, 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.

[0050] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), 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.

[0051] 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.

[0052] 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.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A device for inspecting redundant trigger links of a switchable current source converter valve, characterized in that, The device includes: a valve control system, a first beam splitter, a second beam splitter, and a high-position board for a current source converter valve that can be turned off. The high-level board of the shut-off current source converter valve is used to monitor the detection signal reception status signal of the shut-off current source converter valve, and transmit the monitored detection signal reception status signal of the shut-off current source converter valve back to the valve control system through the second beam splitter. The valve control system is used to send a detection signal to the high-level board of the shut-off current source converter valve through the first optical splitter according to the CP signal issued by the polar control system, and to receive the status signal based on the detection signal returned by the high-level board of the shut-off current source converter valve to perform trigger link detection on the shut-off current source converter valve.

2. The apparatus as claimed in claim 1, characterized in that, The first beam splitter is a 2-to-N beam splitter, and the second beam splitter is a 1-to-2 beam splitter, where N is the number of converter valves directly connected in series on the high-level board of the switchable current source converter valve.

3. The apparatus as described in claim 1, characterized in that, The valve control system includes: the valve control system includes a main control board A and a main control board B, and an interactive optical fiber is provided between the main control board A and the main control board B. Each main control board is connected to a first optical splitter through its corresponding trigger board, and each main control board is connected to a second optical splitter through its corresponding monitoring board.

4. The apparatus as described in claim 3, characterized in that, The trigger board is used to convert the detection signal output by its corresponding main control board into an optical signal and then output it to the first beam splitter; the monitoring board is used to photoelectrically convert and decode the detection signal received from the high-level board of the switchable current source converter valve and then output it to its corresponding main control board.

5. The apparatus as described in claim 3, characterized in that, The main control board A is used to send a 1MHz frequency signal to the high-level board of the shut-off current source converter valve during the effective period of the CP signal issued by the extreme control system. If the 1MHz frequency signal received by the high-level board of the shut-off current source converter valve within the first preset time is received, then the trigger link of the shut-off current source converter valve is normal; otherwise, the trigger link of the shut-off current source converter valve is abnormal.

6. The apparatus as claimed in claim 5, characterized in that, The main control board A is used to send a 1kHz idle pulse signal to the high-level board of the shut-off current source converter valve, and send a patrol start signal to the main control board B before the next CP signal arrives and when the 1kHz idle pulse signal does not emit an optical signal. The main control board B is used to send a 100kHz frequency signal to the high-level board of the shut-off current source converter valve after receiving the inspection start signal. If the 100kHz frequency signal received by the high-level board of the shut-off current source converter valve within the first preset time is received, then the triggering link of the shut-off current source converter valve is normal; otherwise, the triggering link of the shut-off current source converter valve is abnormal.

7. The apparatus as claimed in claim 3, characterized in that, The main control board A is used to send a 1kHz idle pulse signal to the high-level board of the shut-off current source converter valve during the invalid period of the CP signal sent by the extreme control system, and to send a 100kHz frequency signal to the high-level board of the shut-off current source converter valve at preset intervals when the 1kHz idle pulse signal does not emit an optical signal. If the reception status of the 100kHz frequency signal returned by the high-level board of the shut-off current source converter valve within the first preset time is "received", then the trigger link of the shut-off current source converter valve is normal; otherwise, the trigger link of the shut-off current source converter valve is abnormal.

8. The apparatus as claimed in claim 7, characterized in that, The main control board A is used to send a patrol start signal to the main control board B after a preset delay time, at the moment when the 1kHz idle pulse signal does not emit an optical signal; The main control board B is used to send a 100kHz frequency signal to the high-level board of the shut-off current source converter valve after receiving the inspection start signal. If the 100kHz frequency signal received by the high-level board of the shut-off current source converter valve within the first preset time is received, then the triggering link of the shut-off current source converter valve is normal; otherwise, the triggering link of the shut-off current source converter valve is abnormal.

9. The apparatus as claimed in claim 5 or 7, characterized in that, The first preset time is 100μs.

10. The apparatus as claimed in claim 7, characterized in that, The preset interval time is 20ms.

11. A method for inspecting the redundant trigger link of a switchable current source converter valve according to any one of claims 1-10, characterized in that, The method includes: The high-level board of the shut-off current source converter valve monitors the detection signal reception status signal of the shut-off current source converter valve and transmits the monitored detection signal reception status signal of the shut-off current source converter valve back to the valve control system through the second beam splitter. The valve control system sends a detection signal to the high-level board of the shut-off current source converter valve through the first optical splitter based on the CP signal issued by the polar control system, and performs trigger link detection on the shut-off current source converter valve based on the detection signal returned by the high-level board of the shut-off current source converter valve and the status signal received.

12. A computer device, characterized in that, include: One or more processors; The processor is used to execute one or more programs; When the one or more programs are executed by the one or more processors, the method of the redundant trigger link inspection device for the turn-off current source converter valve as described in claim 10 is implemented.

13. A computer-readable storage medium, characterized in that, It contains a computer program, which, when executed, implements the method of the redundant trigger link inspection device for the turn-off current source converter valve as described in claim 10.

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