Cross communication test method of flexible direct current valve control system

Abstract

The invention discloses a cross communication test method for a flexible direct-current valve control system, which is applied to the flexible direct-current valve control system and comprises the following steps: responding to a starting instruction, and starting flexible direct-current valve control full-link test equipment by the flexible direct-current valve control system; if it is detected that the pulse distribution box is disconnected from one of the odd-numbered modules or the even-numbered modules, normal communication of the power module is maintained through a pair of cross communication optical fibers; if it is detected that uplink output optical fibers between the power module and the pulse distribution box are all disconnected, or downlink input optical fibers are all disconnected, the bypass exits the power module; if it is detected that the uplink output optical fibers of the odd modules, the downlink input optical fibers of the even modules and the second cross communication optical fibers are all disconnected, the bypass exits from the power module; and the flexible direct-current valve control system is locked and stopped. The technical problem that the accuracy and effectiveness of cross communication function design cannot be confirmed due to the lack of a cross communication test technology between adjacent power modules of the flexible direct-current valve control system in the prior art can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of flexible DC valve control systems, and in particular to a cross-communication test method for flexible DC valve control systems. Background Art

[0002] With the development of high-voltage, high-power power electronic devices, the improvement of converter modularization, unitization and intelligence, and the improvement of control and modulation strategy performance, flexible DC transmission will play a greater role in the power system.

[0003] The flexible DC valve control is the "brain" of the flexible DC converter valve. Whether it operates normally or not is directly related to the safe and stable operation of the flexible DC converter valve. Therefore, during the development of the flexible DC converter valve, simulation tests are usually carried out on its control and protection system to verify the control and protection functions. In order to fully verify the valve control system, a full-link structure is generally adopted, that is, the test system includes a valve control system consistent with the actual project.

[0004] However, flexible DC valve control belongs to the secondary equipment side, and the test technology for the cross-communication function of adjacent matching power modules of primary equipment is relatively rare, which makes it impossible to determine the accuracy and effectiveness of the cross-communication function design between the two. Summary of the invention

[0005] The present application provides a cross-communication test method for a flexible DC valve-controlled system, which is used to solve the technical problem that the prior art lacks cross-communication test technology between adjacent matching power modules in a flexible DC valve-controlled system, resulting in the inability to confirm the accuracy and effectiveness of the cross-communication function design.

[0006] In view of this, the present application provides a cross-communication test method of a flexible DC valve control system, the test method is applied to the flexible DC valve control system, the system comprising: a pole control system, a valve control system and a power module;

[0007] The pole control system comprises a first pole control box and a second pole control box;

[0008] The valve control system includes a main control box and a pulse distribution box, and two corresponding sets of the main control box and the pulse distribution box are provided;

[0009] The two sets of the main control boxes are connected to each other through the first channel optical fiber and the second channel optical fiber;

[0010] The power module includes an odd-numbered module and an even-numbered module, and executes instructions and generates voltage signals in a simulation manner;

[0011] The first pole control box is connected to one set of the main control boxes, and the second pole control box is connected to another set of the main control boxes;

[0012] The main control box is connected to the pulse distribution box for redundant communication via multiple pairs of redundant optical fibers;

[0013] One set of the pulse distribution boxes is connected to the odd-numbered modules through a pair of optical fibers, and another set of the pulse distribution boxes is connected to the even-numbered modules through a pair of optical fibers;

[0014] The odd-numbered modules are communicatively connected to the even-numbered modules via a first cross-communication optical fiber and a second cross-communication optical fiber;

[0015] The test method includes:

[0016] In response to the start-up instruction, the flexible DC valve control system starts the flexible DC valve control full-link test equipment, simulates the power module through a real-time simulator, and unlocks the rated power operation state of the power module;

[0017] If it is detected that the pulse distribution box is disconnected from the communication with one of the odd-numbered modules or the even-numbered modules, maintaining normal communication of the power modules through the first cross-communication optical fiber and the second cross-communication optical fiber;

[0018] If it is detected that the communication optical fibers between the pulse distribution box and the power module are both disconnected, the power module is bypassed;

[0019] If it is detected that the input optical fibers of the even-numbered modules are all disconnected, or the output optical fibers of the even-numbered modules are all disconnected, the even-numbered modules are bypassed and exited;

[0020] If it is detected that the uplink output optical fibers between the power module and the pulse distribution box are all disconnected, or the downlink input optical fibers are all disconnected, the power module is bypassed and exited;

[0021] If it is detected that the uplink output optical fiber of the odd-numbered module, the downlink input optical fiber of the even-numbered module and the second cross-communication optical fiber are all disconnected, the power module is bypassed and exited;

[0022] The flexible DC valve control system is locked and shut down.

[0023] Preferably, the first cross-communication optical fiber is a communication optical fiber output from the even-numbered module to the odd-numbered module;

[0024] The second cross-communication optical fiber is a communication optical fiber outputted from the odd-numbered modules to the even-numbered modules.

[0025] Preferably, the pole control system is used to generate a modulated wave signal and transmit it to the valve control system;

[0026] The valve control system is used to generate a trigger control signal and send it to the power module;

[0027] The power module uses an FPGA real-time simulator to perform simulation operations, and is used to execute the trigger control signal, generate a voltage signal, and send the voltage signal to a secondary device system.

[0028] Preferably, the first pole control box and the second pole control box are connected via a pair of optical fibers;

[0029] The odd-numbered modules and the even-numbered modules each include a flexible DC valve power module with multiple AU bridge arms.

[0030] Preferably, if it is detected that the pulse distribution box is disconnected from the communication with one of the odd-numbered modules or the even-numbered modules, maintaining the normal communication of the power modules through the first cross-communication optical fiber and the second cross-communication optical fiber, further comprising:

[0031] If it is detected that both the first cross-communication optical fiber and the second cross-communication optical fiber are disconnected, communication is maintained through the uplink and downlink optical fibers of the power module.

[0032] Preferably, if it is detected that the input optical fibers of the even-numbered modules are all disconnected, or the output optical fibers of the even-numbered modules are all disconnected, then the even-numbered modules are bypassed and exited, further comprising:

[0033] If it is detected that both the downlink input optical fiber of the even-numbered module and the first cross-communication optical fiber are disconnected, the second cross-communication optical fiber is used to maintain communication;

[0034] If it is detected that both the uplink output optical fiber of the even-numbered module and the second cross-communication optical fiber are disconnected, the first cross-communication optical fiber is used to maintain communication.

[0035] Preferably, if it is detected that the uplink output optical fiber of the odd-numbered module, the downlink input optical fiber of the even-numbered module and the second cross-communication optical fiber are all disconnected, then the power module is bypassed and exited, further comprising:

[0036] If it is detected that the uplink output optical fiber of the odd-numbered module, the downlink input optical fiber of the even-numbered module and the first cross-communication optical fiber are all disconnected, the second cross-communication optical fiber is used to maintain communication.

[0037] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0038] In the present application, a cross-communication test method for a flexible DC valve control system is provided, and the test method is applied to the flexible DC valve control system, the system comprising: a pole control system, a valve control system and a power module; the pole control system comprises a first pole control box and a second pole control box; the valve control system comprises a main control box and a pulse distribution box, and two corresponding sets of the main control box and the pulse distribution box are provided; the two sets of main control boxes are connected to each other through a first channel optical fiber and a second channel optical fiber; the power module comprises an odd module and an even module, and executes instructions and generates voltage signals by simulation; the first pole control box is connected to one set of main control boxes, and the second pole control box is connected to another set of main control boxes; the main control box is redundantly connected to the pulse distribution box through multiple pairs of redundant optical fibers; one set of pulse distribution boxes is connected to the odd modules through a pair of optical fibers, and the other set of pulse distribution boxes is connected to the even modules through a pair of optical fibers; the odd modules and the even modules are connected to each other through a first cross-communication optical fiber and a second cross-communication optical fiber; the test method The method includes: in response to a start-up instruction, the flexible DC valve control system starts the flexible DC valve control full-link test equipment, simulates the power module through a real-time simulator, and unlocks the rated power operation state of the power module; if it is detected that the pulse distribution box is disconnected from the communication with one of the odd modules or the even modules, the normal communication of the power module is maintained through the first cross-communication optical fiber and the second cross-communication optical fiber; if it is detected that the communication optical fibers between the pulse distribution box and the power module are both disconnected, the power module is bypassed and exited; if it is detected that the input optical fibers of the even modules are all disconnected, or the output optical fibers of the even modules are all disconnected, the even modules are bypassed and exited; if it is detected that the uplink output optical fibers between the power module and the pulse distribution box are all disconnected, or the downlink input optical fibers are all disconnected, the power module is bypassed and exited; if it is detected that the uplink output optical fiber of the odd module, the downlink input optical fiber of the even module and the second cross-communication optical fiber are all disconnected, the power module is bypassed and shut down.

[0039] The cross-communication test method of the flexible DC valve control system provided by the present application provides a more systematic cross-communication test scheme between power modules in the flexible DC valve control system, including the overall structure of the flexible DC valve control system and the specific test operation process; the first cross-communication optical fiber and the second cross-communication optical fiber between the two sets of power modules can provide backup communication lines for odd modules and even modules, and can be used as backup inputs or backup outputs when the input optical fiber or output optical fiber of the two modules is disconnected, and the power module will be bypassed only when both the backup and main communication optical fibers are disconnected; this process can effectively verify the accuracy of the cross-communication function between the power modules, and can meet the cross-communication verification requirements of the power modules in the existing flexible DC valve control system. Therefore, the present application can solve the technical problem that the prior art lacks cross-communication test technology between adjacent matching power modules in the flexible DC valve control system, resulting in the inability to confirm the accuracy and effectiveness of the cross-communication function design. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic flow chart of a cross-communication test method for a flexible DC valve control system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] For easier understanding, see Figure 1 , the present application provides an embodiment of a cross-communication test method for a flexible DC valve control system, the test method is applied to a flexible DC valve control system, the system comprising: a pole control system, a valve control system and a power module;

[0043] The pole control system includes a first pole control box and a second pole control box;

[0044] The valve control system includes a main control box and a pulse distribution box, and two corresponding sets of the main control box and the pulse distribution box are provided;

[0045] The two sets of main control boxes are connected via the first channel optical fiber and the second channel optical fiber communication;

[0046] The power module includes an odd-numbered module and an even-numbered module, and executes instructions and generates voltage signals by simulation;

[0047] The first pole control box is connected to one set of main control boxes, and the second pole control box is connected to another set of main control boxes;

[0048] The main control box is connected to the pulse distribution box for redundant communication via multiple pairs of redundant optical fibers;

[0049] One set of pulse distribution boxes is connected to the odd-numbered modules through a pair of optical fibers, and the other set of pulse distribution boxes is connected to the even-numbered modules through a pair of optical fibers;

[0050] The odd-numbered modules and the even-numbered modules are communicatively connected via a first cross-communication optical fiber and a second cross-communication optical fiber.

[0051] Further, the first cross-communication optical fiber is a communication optical fiber output from the even-numbered modules to the odd-numbered modules;

[0052] The second cross-communication optical fiber is a communication optical fiber output from the odd-numbered modules to the even-numbered modules.

[0053] Further, the pole control system is used to generate a modulated wave signal and transmit it to the valve control system;

[0054] The valve control system is used to generate a trigger control signal and send it to the power module;

[0055] The power module uses an FPGA real-time simulator for simulation operations, which is used to execute trigger control signals, generate voltage signals, and send the voltage signals to the secondary equipment system.

[0056] Furthermore, the first pole control box and the second pole control box are connected via a pair of optical fibers; the odd-numbered modules and the even-numbered modules both include flexible DC valve power modules with multiple AU bridge arms.

[0057] It should be noted that Figure 1 This is a schematic diagram of the overall architecture of the flexible direct current valve control system in the embodiment of the present application. The pole control cabinet in the system includes two sets of mutually redundant pole control boxes A and B, namely the first pole control box and the second pole control box. The two sets of mutually redundant main control boxes A and B in the main control cabinet are jointly responsible for controlling and protecting the flexible direct current valve. The two sets of main control boxes A and B are connected one-to-one with the two sets of pole control boxes in the upper pole control system through communication optical fiber a and optical fiber b respectively, and are used to receive the modulated wave signals sent by the pole control cabinet; after that, the trigger control signal can be generated after being processed by the main control cabinet. Moreover, the two sets of main control boxes A and B are connected to the pulse distribution box of any bridge arm through 4 pairs of mutually redundant independent communication optical fibers, namely Figure 1 Fiber I, II, III, VI and fiber V, VI, VII, VIII. Each pulse panel cabinet contains two pulse distribution boxes, and the No. 1 pulse distribution box is fixedly connected to all odd-numbered power modules in the AU bridge arm, and the No. 2 pulse distribution box is fixedly connected to all even-numbered power modules in the AU bridge arm.

[0058] The pole control system is used to generate a modulation signal and transmit it to the valve control system. The valve control system can generate a trigger control signal based on the signal, and the pulse distribution box distributes it to each power module. The power module simulated by the real-time simulator can execute the trigger control signal and generate a voltage signal. The real-time simulator can be an FPGA simulator or an RTDS simulator or an RT-LAB simulator. The specific one can be selected according to the actual situation. It is not limited here and is only used as an example. The voltage signal generated on the primary device side will be sent again to the secondary device side, that is, the pole control and valve control system, to update the control instructions. This cycle is repeated to maintain the stable operation of the system.

[0059] According to the above structure, it can be found that the cross-communication function between adjacent paired power modules of the flexible DC valve control system has the following main characteristics:

[0060] First, each bridge arm pulse distribution panel cabinet contains two pulse distribution boxes, of which the 1# pulse distribution box is fixedly connected to all odd-numbered power modules in the AU bridge arm through a one-to-one direct communication optical fiber, that is, Figure 1 The direct downlink input fiber 1 and the direct uplink output fiber 2 are connected; the 2# pulse distribution box is fixedly connected to all the even-numbered power modules in the AU bridge arm through a one-to-one direct communication optical fiber, that is, Figure 1 Directly connected downstream input optical fiber 3 and directly connected upstream output optical fiber 4.

[0061] Secondly, a pair of cross-communication optical fibers is configured between the adjacent odd-numbered and even-numbered power modules of each bridge arm, that is, Figure 1 The optical fiber 5 corresponds to the first cross-communication optical fiber and the optical fiber 6 corresponds to the second cross-communication optical fiber, and the flexible direct valve control and the direct communication optical fiber (ie Figure 1 The optical fiber 1, 2 or optical fiber 3, 4) simultaneously transmits the information and status of the two paired power modules.

[0062] In addition, the uplink and downlink communication optical fibers between any two paired power modules simultaneously transmit the information and status of the opposite paired power module and the information and status of this module forwarded by the paired module. For any two paired power modules, this module is used as the benchmark. This module is responsible for detecting its own cross-downlink (receiving) communication failure and valve-controlled direct downlink communication failure.

[0063] It can be found that the two adjacent paired power modules of any bridge arm achieve the effect of doubling the communication reliability with the valve control system through the first cross-communication optical fiber and the second cross-communication optical fiber between each other. Taking AU2N-1 and AU2N as an example, if there is no cross-communication optical fiber between AU2N-1 and AU2N, once the direct uplink and downlink communication optical fiber between the module and the valve control system is interrupted, the power module will not be able to receive the information sent by the valve control system, and the valve control system will not be able to receive the status sent by the power module, and the power module will be bypassed and exit operation; while a cross-communication design is adopted between AU2N-1 and AU2N. Once the direct uplink and downlink communication optical fiber between the power module and the valve control system is interrupted, the power module can still receive the module trigger control instruction information sent by the valve control system through the adjacent paired power module, and the valve control system can also receive the module status sent by the module through the adjacent paired power module, and the module can still maintain normal operation without being bypassed.

[0064] The test methods include:

[0065] In response to the start-up instruction, the flexible DC valve control system starts the flexible DC valve control full-link test equipment, simulates the power module through the real-time simulator, and unlocks the rated power operation state of the power module;

[0066] If it is detected that the pulse distribution box is disconnected from the communication with one of the odd-numbered modules or the even-numbered modules, the normal communication of the power modules is maintained through the first cross-communication optical fiber and the second cross-communication optical fiber;

[0067] If it is detected that the communication optical fibers between the pulse distribution box and the power module are both disconnected, the power module is bypassed;

[0068] If it is detected that the input optical fibers of the even-numbered modules are all disconnected, or the output optical fibers of the even-numbered modules are all disconnected, the even-numbered modules are bypassed and exited;

[0069] If it is detected that the uplink output optical fibers between the power module and the pulse distribution box are all disconnected, or the downlink input optical fibers are all disconnected, the power module is bypassed;

[0070] If it is detected that the uplink output fiber of the odd-numbered module, the downlink input fiber of the even-numbered module, and the second cross-communication fiber are all disconnected, the power module is bypassed and exited;

[0071] The flexible DC valve control system will be locked and shut down.

[0072] Furthermore, if it is detected that the pulse distribution box is disconnected from the communication with one of the odd-numbered modules or the even-numbered modules, the normal communication of the power modules is maintained through the first cross-communication optical fiber and the second cross-communication optical fiber, and further comprising:

[0073] If it is detected that both the first cross-communication optical fiber and the second cross-communication optical fiber are disconnected, communication is maintained through the upstream and downstream optical fibers of the power module.

[0074] Furthermore, if it is detected that the input optical fibers of the even-numbered modules are all disconnected, or the output optical fibers of the even-numbered modules are all disconnected, then the even-numbered modules are bypassed and exited, further comprising:

[0075] If it is detected that both the downlink input optical fiber and the first cross-communication optical fiber of the even-numbered module are disconnected, the second cross-communication optical fiber is used to maintain communication;

[0076] If it is detected that both the uplink output optical fiber and the second cross-communication optical fiber of the even-numbered modules are disconnected, the first cross-communication optical fiber is used to maintain communication.

[0077] Further, if it is detected that the uplink output optical fiber of the odd-numbered module, the downlink input optical fiber of the even-numbered module and the second cross-communication optical fiber are all disconnected, the power module is bypassed and exited, further comprising:

[0078] If it is detected that the uplink output optical fiber of the odd-numbered modules, the downlink input optical fiber of the even-numbered modules and the first cross-communication optical fiber are all disconnected, the second cross-communication optical fiber is used to maintain communication.

[0079] It should be noted that in response to the start-up instruction, the flexible DC valve control system starts the flexible DC valve control full-link test equipment, which includes the power module simulated by the real-time simulator; by simulating the power module through the real-time simulator, the power module can be unlocked to reach the rated power operating state before the test starts, so that the simulated power module can normally execute the trigger control instructions transmitted by the secondary equipment.

[0080] First verify the reliability of the cross-communication function of the cross-communication optical fiber. If the communication between the pulse distribution box and any one of the odd and even modules in the power module is disconnected, that is, both the upstream output and downstream input optical fibers are disconnected, then the module cannot communicate with the pulse distribution box. Under normal circumstances, the module will be bypassed and exit operation; however, there are cross-communication optical fibers between the odd and even modules of the present application, namely the first cross-communication optical fiber 5 and the second cross-communication optical fiber 6. Therefore, after the direct communication optical fiber is disconnected, the cross-communication optical fiber can continue to maintain the communication status as a backup communication optical fiber to ensure that the disconnected power module is not bypassed. For example, if the upstream and downstream direct optical fibers between the AU bridge arm pulse distribution box and the 2N-1 power module are both disconnected, that is Figure 1 The optical fibers 1 and 2 in the bridge arm are then restored, and the odd-numbered modules can still operate normally without being bypassed. Among them, N can be 1, 2, 3, ... 0.5*Nsum-5, and Nsum is the total number of modules in a single bridge arm. If it is an even-numbered module, the effect is the same, and the details are not repeated here.

[0081] In fact, during the communication process, the direct upstream and downstream communication optical fibers between the pulse distribution box and the power modules, and the cross-communication optical fibers between the power modules are two sets of communication optical fibers that serve as backup for each other; disconnecting any one of them will not affect normal communication, and will not cause the power modules to be bypassed. So by the same token, if the odd-numbered modules and the even-numbered modules are to maintain normal communication with the pulse distribution box, then the first cross-communication optical fiber and the second cross-communication optical fiber are disconnected, and then restored, the odd-numbered module 2N-1 and the even-numbered module 2N can still operate normally and will not be bypassed. And it is understandable that if the direct upstream and downstream optical fibers of the odd-numbered module 2N-1 and the even-numbered module 2N are both disconnected, that is, Figure 1 Fibers 1 and 2, as well as fibers 3 and 4 are disconnected. At this time, the odd-numbered module 2N-1 and the even-numbered module 2N will be bypassed; and communication can be maintained by disconnecting the upstream and downstream fibers of any module.

[0082] Assuming that the downlink input optical fiber of the AU2N+2 even-numbered module connected to the pulse distribution box of the AU bridge arm, and the first cross-communication optical fiber between the AU2N+2 even-numbered module and the AU2N+1 odd-numbered module are disconnected, that is, optical fiber 3 and optical fiber 5 in the figure are disconnected, the AU bridge arm odd-numbered module AU2N+1 and the AU2N+2 even-numbered module can still operate normally without being bypassed. However, if the downlink input optical fiber of the AU2N+2 even-numbered module connected to the pulse distribution box of the AU bridge arm, and the second cross-communication optical fiber between the AU2N+2 even-numbered module and the AU2N+1 odd-numbered module are disconnected, all input optical fibers of the AU2N+2 even-numbered module are disconnected, at this time, the AU2N+2 even-numbered module will be bypassed and exit operation, while the AU2N+1 odd-numbered module can still operate normally without being bypassed.

[0083] Still taking the even-numbered module 2N as an example, if all output optical fibers of a certain even-numbered module 2N are disconnected, the even-numbered module will also be bypassed and exit operation. For example Figure 1 Fiber 4 and fiber 5 in the communication module are disconnected, but disconnecting fiber 4 and fiber 7 will not affect the normal operation of the odd-numbered module and the even-numbered module; the specific process will not be repeated. It can be understood that the input fiber here refers to the downlink input fiber and the second cross-communication fiber, and the output fiber refers to the uplink output fiber and the first cross-communication fiber.

[0084] If the upstream output fiber of the power module is cut off at the same time, that is, the fiber that sends information to the pulse distribution box, Figure 1 In the example, if the fiber 2 and fiber 4 are connected, then both power modules cannot send information to the pulse distribution box. At this time, both the odd-numbered and even-numbered modules will be bypassed. The same is true for disconnecting the downstream input fiber of the power module, which will not be described in detail.

[0085] For example, if the uplink output optical fibers of the AU2N+5 odd-numbered module connected to the AU bridge arm pulse distribution box and the AU2N+6 even-numbered module connected to the other AU bridge arm pulse distribution box are both disconnected, that is, Figure 1 If the optical fibers 2 and 4 in the AU2N+5 module are disconnected, the AU2N+6 module will be bypassed. Similarly, if the downlink input optical fibers of the AU2N+7 module and the AU2N+8 module are disconnected, Figure 1 If the optical fiber 1 and optical fiber 3 in the AU2N+7 module are disconnected, the AU2N+8 module will be bypassed. The same is true for the even modules, which will not be described here.

[0086] If it is detected that the uplink output fiber of the odd-numbered module, the downlink input fiber of the even-numbered module, and the second cross-communication fiber are all disconnected, Figure 1If the optical fiber 2, optical fiber 3 and optical fiber 6 in the AU bridge arm are all disconnected, the bypass exits the power module, that is, the odd module and the even module are all exited; in this process, the input optical fiber of the even module is all disconnected, and it cannot receive information; the output optical fiber of the odd module is all disconnected, and it cannot send information, so the two modules cannot operate normally. For example, the uplink output optical fiber of the AU2N+9 odd module connected to the pulse distribution box of the AU bridge arm is disconnected, and the downlink input optical fiber of the AU2N+10 even module connected to the pulse distribution box of the other AU bridge arm is disconnected, and then the second cross-communication optical fiber between the AU2N+9 odd module and the AU2N+10 even module is disconnected. At this time, optical fiber 2, optical fiber 3 and optical fiber 6 are disconnected, and the AU2N+9 odd module and the AU2N+10 even module will be bypassed and exited. However, if the first cross-communication optical fiber, that is, optical fiber 5, is disconnected instead of optical fiber 6, the AU2N+9 odd-numbered module and the AU2N+10 even-numbered module can still operate normally without being bypassed, because a normal communication link can be ensured, that is, normal communication can be maintained through the second cross-communication optical fiber. The test finally locked the system. If the cross-communication function of the power module in the flexible DC valve control system is reasonably designed, a good backup communication function can be achieved. If it is unreasonable, the power module will be frequently bypassed.

[0087] The cross-communication test method of the flexible DC valve control system provided in the embodiment of the present application provides a more systematic cross-communication test scheme between power modules in the flexible DC valve control system, including the overall structure of the flexible DC valve control system and the specific test operation process; the first cross-communication optical fiber and the second cross-communication optical fiber between the two sets of power modules can provide backup communication lines for odd modules and even modules, and can be used as backup input or backup output when the input optical fiber or output optical fiber of the two modules is disconnected, and the power module will be bypassed only when both the backup and main communication optical fibers are disconnected; this process can effectively verify the accuracy of the cross-communication function between the power modules, and can meet the cross-communication verification requirements of the power modules in the existing flexible DC valve control system. Therefore, the embodiment of the present application can solve the technical problem that the prior art lacks cross-communication test technology between adjacent matching power modules in the flexible DC valve control system, resulting in the inability to confirm the accuracy and effectiveness of the cross-communication function design.

[0088] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0089] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0090] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0091] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions for executing all or part of the steps of the method described in each embodiment of the present application through a computer device (which can be a personal computer, server, or network device, etc.). The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (full name in English: Read-Only Memory, English abbreviation: ROM), random access memory (full name in English: Random Access Memory, English abbreviation: RAM), disk or optical disk and other media that can store program codes.

[0092] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A cross communication test method for a flexible DC valve control system, characterized in that: The test method is applied to a flexible DC valve control system, the system comprising: a pole control system, a valve control system and a power module; The pole control system comprises a first pole control box and a second pole control box; The valve control system includes a main control box and a pulse distribution box, and two corresponding sets of the main control box and the pulse distribution box are provided; The two sets of the main control boxes are connected to each other through the first channel optical fiber and the second channel optical fiber; The power module includes an odd-numbered module and an even-numbered module, and executes instructions and generates voltage signals in a simulation manner; The first pole control box is connected to one set of the main control boxes, and the second pole control box is connected to another set of the main control boxes; The main control box is connected to the pulse distribution box for redundant communication via multiple pairs of redundant optical fibers; One set of the pulse distribution boxes is connected to the odd-numbered modules through a pair of optical fibers, and another set of the pulse distribution boxes is connected to the even-numbered modules through a pair of optical fibers; The odd-numbered modules are communicatively connected to the even-numbered modules via a first cross-communication optical fiber and a second cross-communication optical fiber; The test method includes: In response to the start-up instruction, the flexible DC valve control system starts the flexible DC valve control full-link test equipment, simulates the power module through a real-time simulator, and unlocks the rated power operation state of the power module; If it is detected that the pulse distribution box is disconnected from the communication with one of the odd-numbered modules or the even-numbered modules, maintaining normal communication of the power modules through the first cross-communication optical fiber and the second cross-communication optical fiber; If it is detected that the communication optical fibers between the pulse distribution box and the power module are both disconnected, the power module is bypassed; If it is detected that the input optical fibers of the even-numbered modules are all disconnected, or the output optical fibers of the even-numbered modules are all disconnected, the even-numbered modules are bypassed and exited; If it is detected that the uplink output optical fibers between the power module and the pulse distribution box are all disconnected, or the downlink input optical fibers are all disconnected, the power module is bypassed and exited; If it is detected that the uplink output optical fiber of the odd-numbered module, the downlink input optical fiber of the even-numbered module and the second cross-communication optical fiber are all disconnected, the power module is bypassed and exited; The flexible DC valve control system is locked and shut down.

2. The cross communication test method of the flexible DC valve control system according to claim 1 is characterized in that: The first cross-communication optical fiber is a communication optical fiber outputted from the even-numbered module to the odd-numbered module; The second cross-communication optical fiber is a communication optical fiber outputted from the odd-numbered modules to the even-numbered modules.

3. The cross communication test method of the flexible DC valve control system according to claim 1 is characterized in that: The pole control system is used to generate a modulated wave signal and transmit it to the valve control system; The valve control system is used to generate a trigger control signal and send it to the power module; The power module uses an FPGA real-time simulator to perform simulation operations, and is used to execute the trigger control signal, generate a voltage signal, and send the voltage signal to a secondary device system.

4. The cross communication test method of the flexible DC valve control system according to claim 1 is characterized in that: The first pole control box and the second pole control box are connected via a pair of optical fibers; The odd-numbered modules and the even-numbered modules each include a flexible DC valve power module with multiple AU bridge arms.

5. The cross communication test method of the flexible DC valve control system according to claim 1 is characterized in that: If it is detected that the pulse distribution box is disconnected from the communication with one of the odd-numbered modules or the even-numbered modules, maintaining normal communication of the power module through the first cross-communication optical fiber and the second cross-communication optical fiber, further comprising: If it is detected that both the first cross-communication optical fiber and the second cross-communication optical fiber are disconnected, communication is maintained through the uplink and downlink optical fibers of the power module.

6. The cross communication test method of the flexible DC valve control system according to claim 1 is characterized in that: If it is detected that the input optical fibers of the even-numbered modules are all disconnected, or the output optical fibers of the even-numbered modules are all disconnected, then the even-numbered modules are bypassed and exited, further comprising: If it is detected that both the downlink input optical fiber of the even-numbered module and the first cross-communication optical fiber are disconnected, the second cross-communication optical fiber is used to maintain communication; If it is detected that both the uplink output optical fiber of the even-numbered module and the second cross-communication optical fiber are disconnected, the first cross-communication optical fiber is used to maintain communication.

7. The cross communication test method of the flexible DC valve control system according to claim 1 is characterized in that: If it is detected that the uplink output optical fiber of the odd-numbered module, the downlink input optical fiber of the even-numbered module and the second cross-communication optical fiber are all disconnected, then the power module is bypassed and exited, further comprising: If it is detected that the uplink output optical fiber of the odd-numbered module, the downlink input optical fiber of the even-numbered module and the first cross-communication optical fiber are all disconnected, the second cross-communication optical fiber is used to maintain communication.

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