Flexible direct-current valve control system main and standby sleeve switching test method

Abstract

The invention discloses a flexible direct-current valve control system main and standby sleeve switching test method, the test method is applied to a flexible direct-current valve control system, and the method comprises the following steps: starting a flexible direct-current valve control full-link test device and the flexible direct-current valve control system; if the detection channel optical fiber is disconnected, any one of the two pole control boxes is disconnected with the main control box; if it is detected that the two channel optical fibers are both disconnected, the communication connection between any set of main control box and the matched pulse distribution box is disconnected; or if the power supply of any set of main control box is disconnected, the main / standby switching is triggered; if the two channel optical fibers are disconnected, the power supply of one set of main control box is disconnected, the other set of main control box is disconnected with the pole control box, and tripping is triggered; and testing the circulating current suppression function of the main and standby sleeves of the valve control system through the preset number of main and standby switching instructions to obtain a test result. The technical problem that the accuracy and effectiveness of communication function design between a main sleeve and a standby sleeve cannot be determined due to the lack of a switching performance test technology between the main sleeve and the standby sleeve of the 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 method for testing the switching of a main and standby set of a flexible DC valve control system. 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, the prior art lacks a test technology for the switching performance between the main and standby sets of the valve control system, which makes it impossible to determine the accuracy and effectiveness of the design of the data interaction communication function carried by the communication optical fiber between the main and standby sets. Summary of the invention

[0005] The present application provides a method for testing the switching performance between the main and standby sets of a flexible DC valve control system, which is used to solve the technical problem that the prior art lacks a test technology for the switching performance between the main and standby sets of a valve control system, resulting in the inability to determine the accuracy and effectiveness of the design of the communication function between the main and standby sets.

[0006] In view of this, the present application provides a method for testing the switching of a main and standby set of a flexible DC valve control system. The method is applied to a flexible DC valve control system, wherein the system comprises: 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 and the flexible DC valve control full-link test equipment are started, the power module is simulated by a real-time simulator, and the rated power operation state of the power module is unlocked;

[0017] In the case where it is detected that the optical fiber of the first channel is disconnected, if any one of the first pole control box and the second pole control box is disconnected from the matching main control box, the valve control system is triggered to perform a master-slave switching operation;

[0018] In the case where it is detected that both the first channel optical fiber and the second channel optical fiber are disconnected, if any set of the main control box is disconnected from the matching pulse distribution box, the valve control system is triggered to perform a master-slave switching operation;

[0019] When it is detected that both the first channel optical fiber and the second channel optical fiber are disconnected, if the power supply of any set of the main control box is disconnected, the valve control system is triggered to perform a master-slave switching operation;

[0020] When it is detected that both the first channel optical fiber and the second channel optical fiber are disconnected, if the power supply of one set of the main control boxes is disconnected and the other set of the main control boxes is disconnected from the matching pole control box, the system trip is triggered and the master-slave switching failure is reported;

[0021] The circulation suppression function of the main and standby sets of the valve control system is tested by the main and standby switching instructions for a preset number of times to obtain the test results.

[0022] Preferably, the first cross-communication optical fiber is a communication optical fiber output from the even-numbered module to the odd-numbered module;

[0023] The second cross-communication optical fiber is a communication optical fiber outputted from the odd-numbered modules to the even-numbered modules.

[0024] Preferably, the pole control system is used to generate a modulated wave signal and transmit it to the valve control system;

[0025] The valve control system is used to generate a trigger control signal and send it to the power module;

[0026] 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.

[0027] Preferably, the first pole control box and the second pole control box are connected via a pair of optical fibers;

[0028] The odd-numbered modules and the even-numbered modules each include a flexible DC valve power module with multiple AU bridge arms.

[0029] Preferably, in the case where the first channel optical fiber is detected to be disconnected, if any one of the first pole control box and the second pole control box is disconnected from the matching main control box, the valve control system is triggered to perform a master-slave switching operation, and further includes:

[0030] When it is detected that the optical fiber of the first channel is disconnected, if the connection between the first pole control box, the second pole control box and the main control box is completely disconnected, the system tripping is triggered, and the two valve control systems are reported to request tripping.

[0031] Preferably, when it is detected that both the first channel optical fiber and the second channel optical fiber are disconnected, if the power supply of one set of the main control boxes is disconnected and the other set of the main control boxes is disconnected from the matching pole control box, the system trip is triggered and the failure of the main-standby switching is reported, and then the following is further included:

[0032] In response to a system restart instruction, the valve control system is reset, all disconnected optical fibers are restored to a connected state, and the power module is restored to a rated power operating state after unlocking.

[0033] Preferably, the circulating flow suppression function of the main and standby sets of the valve control system is tested by the main and standby switching instructions for a preset number of times to obtain the test results, including:

[0034] When a preset number of master-slave switching instructions are detected, the first channel optical fiber and the second channel optical fiber are disconnected simultaneously;

[0035] If the master-slave switching instruction of the preset number of times is detected again, the circulation suppression function of the standby valve control box is exited based on the exit instruction, and the connection between the first channel optical fiber and the second channel optical fiber is restored;

[0036] Monitor the operating status of the circulation suppression function of the main and standby sets in the valve control system to obtain test results, which include the exit of the standby function and the entry of the main function.

[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 test method for switching between the main and standby sets of a flexible DC valve control system is provided. The test method is applied to the flexible DC valve control system, and the system includes: a pole control system, a valve control system and a power module; the pole control system includes 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 main control boxes are connected to each other through a first channel optical fiber and a second channel optical fiber; the power module includes an odd module and an even module, and executes instructions and generates voltage signals in a simulation manner; 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 includes: in response to a start instruction, starting the flexible DC valve control system and The flexible DC valve-controlled full-link test equipment simulates the power module through a real-time simulator to unlock the rated power operating state of the power module; when it is detected that the first channel optical fiber is disconnected, if any one of the first pole control box and the second pole control box is disconnected from the matching main control box, the valve control system is triggered to perform the main-standby switching operation; when it is detected that both the first channel optical fiber and the second channel optical fiber are disconnected, if any one of the main control boxes is disconnected from the matching pulse distribution box, the valve control system is triggered to perform the main-standby switching operation; when it is detected that both the first channel optical fiber and the second channel optical fiber are disconnected, if the power supply of any one of the main control boxes is disconnected, the valve control system is triggered to perform the main-standby switching operation; when it is detected that both the first channel optical fiber and the second channel optical fiber are disconnected, if the power supply of one set of the main control box is disconnected and the other set of the main control box is disconnected from the matching pole control box, the system is triggered to trip and the failure of the main-standby switching is reported; the circulation suppression function of the main and standby sets of the valve control system is tested through the preset number of main-standby switching instructions to obtain the test results.

[0039] The flexible DC valve control system main and standby set switching test method provided in the present application provides a relatively reliable and effective valve control system main and standby set switching test scheme, and designs the corresponding test operation process according to the specific flexible DC valve control system structure; in this process, the two main control boxes of the valve control system are connected through the first channel optical fiber and the second channel optical fiber. The test process mainly detects and analyzes the on and off status of this pair of channel optical fibers, and performs specific main and standby switching operation tests in conjunction with the on and off of other optical fibers. This process can realize the main and standby set switching performance test in the valve control system in a relatively comprehensive and systematic manner, and can provide relatively reliable technical support for the design of the communication function between the main and standby sets. Therefore, the present application can solve the technical problem that the prior art lacks a switching performance test technology between the main and standby sets of the valve control system, resulting in the inability to determine the accuracy and effectiveness of the communication function design between the main and standby sets. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A flow chart of a method for switching between main and standby sets of 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 test method for switching between a main and standby set of 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] Further, the first pole control box and the second pole control box are connected via a pair of optical fibers;

[0057] Both the odd-numbered modules and the even-numbered modules include flexible DC valve power modules with multiple AU bridge arms.

[0058] It should be noted that Figure 1 That is the overall architecture diagram of the flexible direct current valve control system in the embodiment of the present application. The pole control panel 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 main control panel cabinet in the flexible direct current valve control system includes two sets of mutually redundant main control boxes A and B, which jointly control and protect the flexible direct current converter 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 panel cabinet; after that, the trigger control signal can be generated after being processed by the main control panel cabinet. Moreover, the two sets of main control boxes A and B are connected to the pulse distribution box of any bridge arm by 4 pairs of mutually redundant independent communication optical fiber connections, namely Figure 1 The middle optical fiber I, II, III, VI and optical fiber V, VI, VII, VIII. Among them, the pulse screen cabinet contains two pulse distribution boxes, and the No. 1 pulse distribution box is fixedly connected to all the odd-numbered power modules in the AU bridge arm, and the No. 2 pulse distribution box is fixedly connected to all the even-numbered power modules in the AU bridge arm.

[0059] 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 or 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.

[0060] Under normal circumstances, one of the two main control boxes A and B in the valve control system can be selected as the main one and the other as the backup one. During operation, the main one sends a control protection signal to control and protect the flexible DC converter valve; at this time, the signal sent by the backup one cannot be executed. Once the main one fails, such as the main control panel cabinet itself fails and cannot work, the communication optical fiber receiving the modulated wave sent by the upper pole control system is interrupted, and the 4 pairs of communication optical fibers between the main control box and the pulse distribution box of the main control panel cabinet are all interrupted; or the main and backup switch command issued by the operator is received, the duty status of the main set needs to be changed to backup, and the duty status of the backup set needs to be changed to main.

[0061] The hardware configuration and software functions of the two redundant master control boxes A and B are completely consistent. Two pairs of independent and redundant communication optical fibers are set between the two master control boxes A and B, namely Figure 1 The channel 1 optical fiber and the channel 2 optical fiber correspond to the first channel optical fiber and the second channel optical fiber in the embodiment respectively. If only one pair of the two pairs of mutually redundant communication optical fibers is broken, only an alarm prompt will be given, and the remaining pair can continue to complete the mutual transmission of data; if both pairs are broken, the data transmission between the two sets of main control boxes A and B of the valve control system will be completely interrupted.

[0062] It can be found that these two pairs of channel optical fibers can realize the mutual transmission of data between the two sets of main control boxes A and B of the valve control system. The data types transmitted include: the duty status signal of the valve control panel cabinet itself (main set / standby set), system self-test signal; system self-test signal includes but is not limited to VBC-OK, and signals such as failure of the flexible direct valve control main control panel cabinet. Among them, the VBC-OK signal will change from valid "1" to invalid "0"; the main control panel cabinet failure includes the failure of itself to work, the interruption of the communication optical fiber receiving the modulated wave sent by the upper pole control system, and the interruption of all 4 pairs of communication optical fibers of the main control box and the pulse distribution box of the main control panel cabinet.

[0063] Moreover, the enable signal of circulating current suppression will not follow between the two sets of master control boxes A and B. The duty status signal of the valve control panel cabinet itself, that is, the main set / backup set and the system self-check signal (VBC-OK), which are transmitted between the two redundant master control boxes A and B, are crucial to the two tripping logics of valve control, namely, the VBC-not OK request tripping of the two sets of valve control master control panels and the valve control master control panel switching failure request tripping.

[0064] The two trip logic basic principles are as follows:

[0065] Two sets of valve control main control panels VBC-Not OK request tripping: Under the premise that the two sets of redundant main control boxes A and B can still communicate normally, if the main set of valve control main control panel cabinet detects that the VBC of its own valve control is not OK, and at the same time receives the VBC of the opposite set of valve control sent by the transmission optical fiber between the AB sets, and the VBC-Not OK duration t of both sets of main control boxes A and B exceeds the set time Tset1, the main set of valve control main control panel cabinet will report "A, B two sets of valve control system VBC-Not OK request tripping" at the exit, and after the upper-level control receives it, the system will trip and stop operating.

[0066] The valve control main control panel switching failed and requested tripping: If the main valve control system detects that the valve control VBC of this set is not OK, and the duty signal of this set continues to remain the main set, and the duration t of the two appearing at the same time exceeds the set time Tset2, the main valve control system export reports "valve control system main-standby switching failure request tripping", and after the upper-level control receives it, the system trips and stops operating.

[0067] In addition, 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.

[0068] The test methods include:

[0069] In response to the start-up instruction, the flexible DC valve control system and the flexible DC valve control full-link test equipment are started, the power module is simulated through the real-time simulator, and the rated power operation state of the power module is unlocked;

[0070] In the case where the first channel optical fiber is detected to be disconnected, if either the first pole control box or the second pole control box is disconnected from the matching main control box, the valve control system is triggered to perform a master-slave switching operation;

[0071] When it is detected that both the first channel optical fiber and the second channel optical fiber are disconnected, if any set of main control box loses communication connection with the matching pulse distribution box, the valve control system is triggered to perform the main-standby switching operation;

[0072] When it is detected that both the first channel optical fiber and the second channel optical fiber are disconnected, if the power supply of any set of main control boxes is disconnected, the valve control system is triggered to perform the main-standby switching operation;

[0073] When it is detected that both the first channel optical fiber and the second channel optical fiber are disconnected, if the power supply of one set of main control boxes is disconnected and the other set of main control boxes is disconnected from the matching pole control box, the system trips and reports the failure of the main-standby switching;

[0074] The circulation suppression function of the main and standby sets of the valve control system is tested by the preset number of main and standby switching instructions to obtain the test results.

[0075] Further, in the case where the first channel optical fiber is detected to be disconnected, if any one of the first pole control box and the second pole control box is disconnected from the matching main control box, the valve control system is triggered to perform a main-standby switching operation, and further includes:

[0076] When the optical fiber of the first channel is detected to be disconnected, if the connection between the first pole control box, the second pole control box and the main control box is completely disconnected, the system tripping is triggered and the two valve control systems are reported to request tripping.

[0077] Furthermore, when it is detected that both the first channel optical fiber and the second channel optical fiber are disconnected, if the power supply of one set of main control boxes is disconnected, and the other set of main control boxes is disconnected from the matching pole control box, the system trip is triggered and the failure of the main-standby switching is reported, and then it also includes:

[0078] In response to the system restart instruction, the valve control system is reset, all disconnected optical fibers are restored to a connected state, and the power module is restored to a rated power operating state after unlocking.

[0079] Furthermore, the circulation suppression function of the main and standby sets of the valve control system is tested through the preset number of main and standby switching instructions, and the test results are obtained, including:

[0080] When a preset number of master-slave switching instructions are detected, the first channel optical fiber and the second channel optical fiber are disconnected at the same time;

[0081] If the preset number of master-slave switching instructions are detected again, the circulation suppression function of the standby valve control box is exited based on the exit instruction, and the connection between the first channel optical fiber and the second channel optical fiber is restored;

[0082] Monitor the operating status of the circulation suppression function of the main and standby sets in the valve control system and obtain the test results, which include the exit of the standby function and the activation of the main function.

[0083] It should be noted that in response to the start-up instruction, the flexible DC valve control system and the flexible DC valve control full-link test equipment are started, which includes the power module simulated by the real-time simulator; by simulating the power module with the real-time simulator, the power module can reach the rated power operating state after unlocking before the test starts, ensuring that the simulated power module can normally execute the trigger control instructions transmitted by the secondary equipment.

[0084] First, test the communication function of the second channel optical fiber. If it is detected that the first channel optical fiber is disconnected, and in this case, if it is detected that any one of the corresponding main control boxes in the first pole control box and the second pole control box is disconnected, for example, the optical fiber a between the first pole control box A and the corresponding main control box A is disconnected, then the valve control system will be triggered to perform the main-standby switching operation, which is specifically manifested as the A set of valve control main control screen reporting VBC is not OK, and the valve control system should switch to B main and A standby; similarly, if the optical fiber b between the second pole control box B and the corresponding main control box B is disconnected, the B set of valve control main control screen reports VBC is not OK, and the valve control switches to A main and B standby.

[0085] If the first channel optical fiber is disconnected, the connection between the two pole control boxes and the main control box is completely disconnected, that is, both optical fiber a and optical fiber b are disconnected, then the valve control system will report that both the main and standby sets are not OK, request tripping, and will not report the switch failure request tripping, and then the system will trip. After the above test is completed, it is necessary to restore the disconnected light to the connected state, then restart the system, reset the valve control, and re-operate to the rated power operation state after unlocking.

[0086] Then, to detect the situation where the optical fibers of two channels are cut off at the same time, it is necessary to detect the on-off status between the main control box and the pulse distribution box. If any set of main control boxes is disconnected from the corresponding matching pulse distribution box; for example, all connections between the main control box A and the AU bridge arm pulse screen cabinet are disconnected, that is, optical fibers I, II, III, and VI; then the main and standby switching operation of the valve control system is triggered. Here, the A set of valve control main control screen reports that VBC is not OK, and the valve control is switched to B main and A standby. If all connections between the main control box B and the AU bridge arm pulse screen cabinet are disconnected, the situation is similar and the details will not be repeated.

[0087] In addition, in the case where both channel optical fibers are disconnected, if the power supply of any set of main control boxes is disconnected, it is also necessary to trigger the master-slave switching of the valve control system; for example, if the power supply of valve control main control box A is cut off, the screen of valve control main control box A will report that VBC is not OK, and the valve control will switch to B master and A standby; if the power supply of valve control main control box B is cut off, the screen of valve control main control box B will report that VBC is not OK, and the valve control will switch to A master and B standby.

[0088] Moreover, in the case where both channel optical fibers are disconnected, if the power supply of one set of main control box is disconnected, and the other set of main control box is disconnected from the matching pole control box, the system trips and reports the failure of the primary-standby switching. For example, if the power supply of main control box A is disconnected, and the downstream input optical fiber b between main control box B and the second pole control box B is disconnected, at this time, the valve control system of set B reports that it is not OK and requests switching. If the switching fails, it reports switching failure and requests tripping, and then the system trips. During this process, the valve control system of set B will not report that both the primary and standby sets are not OK and request tripping. The test of the case where both channel optical fibers are disconnected is completed. At this time, it is necessary to restart the system, reset the valve control, restore all disconnected optical fibers to the connected state, and restore the power module to the rated power operation state after unlocking to ensure that the starting point of subsequent test operations is the initialization state.

[0089] After completing the above test, if the master-slave switching command is detected for a preset number of times, generally this command is actively sent by the operator, and the preset number of times can be set according to the actual situation, for example, 2 times; that is, if the master-slave switching command is detected twice, the system needs to perform 2 master-slave switching operations; then the two channel optical fibers can be disconnected to cut off the communication connection between the two main control systems. Perform the master-slave switching again in the same way, and the same preset number of times, then the circulation suppression function of the standby valve control system can be exited according to the exit command, and the connection between the first channel optical fiber and the second channel optical fiber can be restored. At this time, the master-slave function status is detected, and the circulation suppression function of the standby valve control system should remain in the exit state, while the circulation suppression function of the main valve control system should be in the engaged state; after the test is completed, two more master-slave switching operations can be performed to reset and adjust the system.

[0090] The flexible DC valve control system master-slave set switching test method provided in the embodiment of the present application provides a relatively reliable and effective valve control system master-slave set switching test scheme, and designs the corresponding test operation process according to the specific flexible DC valve control system structure; in this process, the two main control boxes of the valve control system are connected through the first channel optical fiber and the second channel optical fiber. The test process mainly detects and analyzes the on-off status of this pair of channel optical fibers, and performs specific master-slave switching operation tests in conjunction with the on-off status of other optical fibers. This process can realize the master-slave set switching performance test in the valve control system in a relatively comprehensive and systematic manner, and can provide relatively reliable technical support for the design of the communication function between the master and standby sets. Therefore, the embodiment of the present application can solve the technical problem that the prior art lacks a switching performance test technology between the master and standby sets of the valve control system, resulting in the inability to determine the accuracy and effectiveness of the communication function design between the master and standby sets.

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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 test method for switching between main and standby sets of 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 and the flexible DC valve control full-link test equipment are started, the power module is simulated by a real-time simulator, and the rated power operation state of the power module is unlocked; In the case where it is detected that the optical fiber of the first channel is disconnected, if any one of the first pole control box and the second pole control box is disconnected from the matching main control box, the valve control system is triggered to perform a master-slave switching operation; In the case where it is detected that both the first channel optical fiber and the second channel optical fiber are disconnected, if any set of the main control box is disconnected from the matching pulse distribution box, the valve control system is triggered to perform a master-slave switching operation; When it is detected that both the first channel optical fiber and the second channel optical fiber are disconnected, if the power supply of any set of the main control box is disconnected, the valve control system is triggered to perform a master-slave switching operation; When it is detected that both the first channel optical fiber and the second channel optical fiber are disconnected, if the power supply of one set of the main control boxes is disconnected and the other set of the main control boxes is disconnected from the matching pole control box, the system trip is triggered and the master-slave switching failure is reported; The circulation suppression function of the main and standby sets of the valve control system is tested by the main and standby switching instructions for a preset number of times to obtain the test results.

2. The method for switching the main and standby sets 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 method for switching the main and standby sets 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 method for switching the main and standby sets 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 method for switching the main and standby sets of the flexible DC valve control system according to claim 1 is characterized in that: In the case where it is detected that the optical fiber of the first channel is disconnected, if any one of the first pole control box and the second pole control box is disconnected from the matching main control box, the valve control system is triggered to perform a master-slave switching operation, and further includes: When it is detected that the optical fiber of the first channel is disconnected, if the connection between the first pole control box, the second pole control box and the main control box is completely disconnected, the system tripping is triggered, and the two valve control systems are reported to request tripping.

6. The method for switching the main and standby sets of the flexible DC valve control system according to claim 1 is characterized in that: In the case where it is detected that both the first channel optical fiber and the second channel optical fiber are disconnected, if the power supply of one set of the main control boxes is disconnected and the other set of the main control boxes is disconnected from the matching pole control box, the system trip is triggered and the failure of the main-standby switching is reported, and then the following is further included: In response to a system restart instruction, the valve control system is reset, all disconnected optical fibers are restored to a connected state, and the power module is restored to a rated power operating state after unlocking.

7. The method for switching the main and standby sets of the flexible DC valve control system according to claim 1 is characterized in that: The circulating flow suppression function of the main and standby sets of the valve control system is tested by the main and standby switching instructions of the preset number of times, and the test results are obtained, including: When a preset number of master-slave switching instructions are detected, the first channel optical fiber and the second channel optical fiber are disconnected simultaneously; If the master-slave switching instruction of the preset number of times is detected again, the circulation suppression function of the standby valve control box is exited based on the exit instruction, and the connection between the first channel optical fiber and the second channel optical fiber is restored; Monitor the operating status of the circulation suppression function of the main and standby sets in the valve control system to obtain test results, which include the exit of the standby function and the entry of the main function.

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