A flexible DC valve control board on-site testing device and testing method

Abstract

The present invention relates to the technical field of flexible direct current valve control board card detection, and discloses a flexible direct current valve control board card on-site testing device and a testing method. In a test environment formed by other board cards of the valve control, the first board card test integration unit and the second board card test integration unit in the test chassis can be respectively communicated with the monitoring host through the first backplane and the second backplane via a network switch, and the monitoring host can detect the board cards under test in the first board card test integration unit and the second board card test integration unit. Without changing the programs of the spare board cards and the test environment formed by other board cards of the valve control, the health status of a single spare board card can be quickly detected, and the available spare board cards can be selected, thereby shortening the repair time of the converter station.

Description

Technical Field

[0001] The present invention relates to the technical field of flexible direct current valve control board card detection, and specifically relates to a flexible direct current valve control board card on-site test device and a test method. Background Technique

[0002] Flexible direct current (HVDC flexible) is a new generation of high-voltage direct current transmission technology composed of fully controlled power electronic devices. It has the characteristics of independent control of active power and reactive power, no commutation failure problem, the ability to supply power to passive networks, good harmonic performance, etc., and is suitable for applications in distributed renewable energy grid connection, asynchronous interconnection of AC power grids, power supply to weak grids or islands, etc. Among them, the modular multi-level converter (MMC) has the advantages of being suitable for high-voltage large-capacity power transmission, low power device loss, and high waveform quality. The proposal of this topology has greatly promoted the engineering application of flexible direct current transmission technology.

[0003] The MMC converter valve is the core equipment in the flexible direct current transmission system, and valve control is the "brain" of the MMC converter valve. Its safety and reliability directly affect the reliability of the flexible direct current transmission project. In order to ensure the reliability of the converter valve control, the valve control is generally configured with dual redundancy, and recent tendered projects even stipulate that a single element failure of the valve control shall not cause the converter valve to shut down. The basic unit of the valve control is the board card that runs various programs. After a board card fails, the fault is generally eliminated by replacing the spare board card on-site. Although the spare board cards have passed the factory inspection when delivered, their usability after long-term storage still needs to be tested on-site before being installed on the screen for use, so as to avoid the situation where the spare parts still have faults and delay the emergency repair time.

[0004] CN112817297B proposes a test device and a test method for a converter valve control device, wherein the test device comprises: at least one test board, which is used to make a corresponding simulation response according to a trigger command; generate a backcheck state according to a backcheck signal, generate corresponding backcheck information according to the backcheck state, and transmit the backcheck information back to a monitoring device through a converter valve control device; a display device displays the simulation response and the backcheck state; and a power module supplies power to the test board. The test board of the present invention has at least one central control board program built in. After the central control board program parses the trigger command, the test board makes a corresponding simulation response, which truly reflects the actual software and hardware operating environment of the valve control device, thereby realizing the trigger program test of the converter valve control device; the test board generates a corresponding backcheck state based on the backcheck signal, obtains the backcheck information through the central control board program to be tested, and transmits the backcheck information back to the converter valve control device, thereby realizing the backcheck program test of the converter valve control device. However, the disadvantage of this scheme is that the entire flexible direct current valve control system must be tested, but a single board cannot be tested without the test environment formed by other boards of the valve control. Summary of the invention

[0005] In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to provide a field testing device and testing method for a flexible direct current valve control board, so as to solve the technical problems in the prior art of testing a single board in a test environment formed by other boards that cannot be separated from valve control and the low efficiency of emergency repair of converter stations.

[0006] The present invention is achieved through the following technical solutions:

[0007] A flexible direct current valve control board field test device comprises a monitoring host, a network switch and a test chassis; the test chassis is provided with a first board test integrated unit, a second board test integrated unit, a first backplane and a second backplane; the first board test integrated unit is inserted into a slot in the first backplane and is connected to the monitoring host through the network switch; the second board test integrated unit is inserted into a slot in the second backplane and is connected to the monitoring host through the network switch.

[0008] Preferably, the first board test integrated unit includes a first accompanying test board, an ACB bridge arm control board, a CPU main processor board, an AFB auxiliary function board and an IO trip output board arranged side by side in sequence; the first accompanying test board, ACB bridge arm control board, CPU main processor board, AFB auxiliary function board and IO trip output board are inserted into the slots of the first backplane in sequence.

[0009] Further, the first companion test board communicates with the CPU main processor board through the first backplane; the ACB bridge arm control board communicates with the CPU main processor board through the first backplane; the AFB auxiliary function board communicates with the CPU main processor board through the first backplane; the IO trip outlet board communicates with the CPU main processor board through the first backplane.

[0010] Further, the side of the first companion test board away from the first backplane is the front panel. The first companion test board communicates with the CPU main processor board through two optical emission ports and receiving ports on the front panel; the first companion test board communicates with the ACB bridge arm control board through two Aurora optical ports on the front panel, the first companion test board communicates with the AFB auxiliary function board through two optical emission ports on the front panel, the first companion test board communicates with the IO trip outlet board through the digital quantity input interface on the front panel, and the first companion test board communicates with the monitoring host through the Ethernet interface and network management on the front panel.

[0011] Preferably, the second board card test integration unit includes a second companion test board, an LB trigger board, and a VGCB pulse switching board arranged in sequence; the second companion test board, the LB trigger board, and the VGCB pulse switching board are inserted into the slots of the second backplane in sequence.

[0012] Further, the second companion test board communicates with the VGCB pulse switching board through the second backplane; the LB trigger board communicates with the VGCB pulse switching board through the second backplane.

[0013] Further, the side of the second companion test board away from the second backplane is the front panel. The LC slow optical transceiver interface on the front panel of the second companion test board is connected to the LC slow optical transceiver port on the front panel of the LB trigger board through an optical fiber; the front panel of the second companion test board is connected to the monitoring host through an Ethernet interface and a gateway.

[0014] Further, the side of the VGCB pulse switching board away from the second backplane is the front panel. One Aurora optical port on the front panel of the VGCB pulse switching board is connected to the ACB bridge arm control board through an optical fiber; the other Aurora optical port is connected to the first companion test board through an optical fiber.

[0015] Preferably, the first backplane and the second backplane adopt the FPGA+PowerPC architecture, and the communication between the first backplane and the second backplane is transceiver through the FPGA.

[0016] A flexible DC valve control board field test method, based on the above-mentioned flexible DC valve control board field test device, includes the following steps:

[0017] Step 1, start the test device. When it is confirmed that the wiring of all boards is correct and there is no abnormality in the board under test, no fault information is reported on the display interface of the monitoring host.

[0018] Step, when there is an abnormality in the board under test, confirm the type and number of the board under test, disconnect the corresponding wiring of the board under test, find the corresponding board in the first board test integration unit and the second board test integration unit of the test chassis according to the type and number of the board under test and replace it, and then restore the wiring after replacement;

[0019] Step, set the test experiment of the board under test through the monitoring host and send an execution command to the corresponding backplane of the board under test;

[0020] Step 4, start the test. When the test result shows an abnormality, return to step 2 and execute it again. Otherwise, the test ends.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects:

[0022] The present invention provides a flexible DC valve control board on-site test device. By setting a first board test integration unit, a second board test integration unit, a first backplane and a second backplane in the test chassis; the first board test integration unit is inserted into the slot in the first backplane and communicates with the monitoring host through a network switch; the second board test integration unit is inserted into the slot in the second backplane and communicates with the monitoring host through a network switch. In the test environment formed by other boards of the valve control, the first board test integration unit and the second board test integration unit in the test chassis can communicate with the monitoring host through the first backplane and the second backplane via the network switch respectively, and the monitoring host can detect the board under test in the first board test integration unit and the second board test integration unit. Without changing the program of the spare board and the test environment formed by other boards of the valve control, the health status of a single spare board can be quickly detected, and the available spare board can be selected, shortening the repair time of the converter station.

[0023] Further, a plurality of boards are arranged in sequence on the first board test integration unit and the second board test integration unit respectively. According to the type and number of the board under test, the corresponding spare board can be found on the first board test integration unit and the second board test integration unit for testing, and the health status of a single spare board can be quickly detected, shortening the repair time of the converter station.

[0024] The present invention provides a flexible DC valve control board on-site test method. The valve control board to be tested can be directly replaced with the corresponding board of the same type in the test chassis for testing, without changing the on-site program already burned in the board to be tested, which can ensure the correct program version in the board. At the same time, a single board can be detected in the test environment formed by other boards of the valve control, greatly improving the repair efficiency of the converter station. Description of the Drawings

[0025] Figure 1 This is a schematic structural diagram of the on-site test device for the flexible DC valve control board card in the present invention;

[0026] Figure 2 This is a schematic diagram of the front panel circuit of the test chassis in the present invention;

[0027] Figure 3 This is a schematic structural diagram of the first backplane of the test chassis in the present invention;

[0028] Figure 4 This is a schematic structural diagram of the second backplane of the test chassis in the present invention.

[0029] In the figure: 1 - monitoring host; 2 - network switch; 3 - test chassis; 4 - first board card test integration unit; 5 - second board card test integration unit; 6 - first accompanying test board card; 7 - ACB bridge arm control board; 8 - CPU main processor board; 9 - AFB auxiliary function board; 10 - IO trip outlet board; 11 - second accompanying test board card; 12 - LB trigger board; 13 - VGCB pulse switching board; 14 - first backplane; 15 - first slot; 16 - second slot; 17 - third slot; 18 - fourth slot; 19 - fifth slot; 20 - second backplane; 21 - sixth slot; 22 - seventh slot; 23 - eighth slot. Specific embodiments

[0030] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily need to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings:

[0033] The object of the present invention is to provide a flexible DC valve control board on-site testing device and a testing method, so as to solve the technical problems in the prior art that it is impossible to detect a single board card without the test environment formed by other board cards of the valve control, and the repair efficiency of the converter station is low.

[0034] Specifically, according to Figure 1 As shown, a flexible DC valve control board on-site testing device includes a monitoring host 1, a network switch 2 and a testing chassis 3; a first board card testing integration unit 4, a second board card testing integration unit 5, a first backplane 14 and a second backplane 20 are arranged in the testing chassis 3; the first board card testing integration unit 4 is inserted into a slot in the first backplane 14 and is communicatively connected to the monitoring host 1 through the network switch 2; the second board card testing integration unit 5 is inserted into a slot in the second backplane 20 and is communicatively connected to the monitoring host 1 through the network switch 2.

[0035] Specifically, according to Figure 2 As shown, the first board card testing integration unit 4 includes a power supply board, a first companion board card 6, an ACB bridge arm control board 7, a CPU main processor board 8, an AFB auxiliary function board 9 and an IO trip outlet board arranged side by side in sequence; the first companion board card 6, the ACB bridge arm control board 7, the CPU main processor board 8, the AFB auxiliary function board 9 and the IO trip outlet board are inserted into the slots of the first backplane 14 in sequence.

[0036] Among them, the first companion board card 6 performs 5-way LVDS signal transceiver communication with the CPU main processor board 8 through the first backplane 14; the ACB bridge arm control board 7 performs the 6th-way LVDS transceiver communication with the CPU main processor board 8 through the first backplane 14; the AFB auxiliary function board 9 performs 1-way LVDS transceiver communication with the CPU main processor board 8 through the first backplane 14; the IO trip outlet board performs 1-way LVDS transceiver communication with the CPU main processor board 8 through the first backplane 14.

[0037] Among them, one side of the first companion board card 6 away from the first backplane 14 is the front panel. The first companion board card 6 sends the pole control command information and the duty signal to the CPU main processor board 8 through the two optical emission ports on the front panel, and receives the valve control state signal and the recording wave signal CPU from the CPU main processor board 8 through the two optical reception ports; the first companion board card 6 is communicatively connected to the ACB bridge arm control board 7 through the two Aurora optical ports on the front panel, the first companion board card 6 is communicatively connected to the AFB auxiliary function board 9 through the two optical emission ports on the front panel, the first companion board card 6 is communicatively connected to the IO trip outlet board through the 1-way digital quantity input interface on the front panel, and the first companion board card 6 is communicatively connected to the monitoring host 1 through the Ethernet interface and the network management on the front panel.

[0038] Specifically, according to Figure 2As shown in the figure, the second board card test integration unit 5 includes a power board, a second companion board card 11, an LB trigger board 12, and a VGCB pulse switching board 13 arranged in sequence; the second companion board card 11, the LB trigger board 12, and the VGCB pulse switching board 13 are inserted into the slots of the second backplane 20 in sequence.

[0039] Among them, the second companion board card 11 communicates with the VGCB pulse switching board through the second backplane 20 for 15-way LVDS signal transceiver communication; the LB trigger board communicates with the VGCB pulse switching board through the second backplane 20 for the 16th-way LVDS communication.

[0040] Among them, the side of the second companion board card 11 away from the second backplane 20 is the front panel. The 12 LC slow optical transceiver interfaces on the front panel of the second companion board card 11 are communicatively connected to the 12 LC slow optical transceiving ports of the LB trigger board through optical fibers; the front panel of the second companion board card 11 is communicatively connected to the monitoring host 1 through an Ethernet interface and a gateway.

[0041] Among them, the side of the VGCB pulse switching board away from the second backplane 20 is the front panel. One Aurora optical port on the front panel of the VGCB pulse switching board is communicatively connected to the ACB bridge arm control board through an optical fiber; the other Aurora optical port is communicatively connected to the first companion board card 6 through an optical fiber.

[0042] Specifically, the first backplane 14 and the second backplane 20 adopt the FPGA + PowerPC architecture. Among them, the communication between the first backplane 14 and the second backplane 20 is selectively transceived through the FPGA. The selection of the FPGA communication function mode is issued by the monitoring host through a switch and a PowerPC; in this way, the pins of the FPGA transceiver can be changed through the setting commands in the monitoring host, so as to achieve the purpose of changing the channels of the LVDS communication interfaces in the backplane communication. The reason for such a design is that the LVDS communication channels used by different ACB boards (ACB1-6) and different LB boards (LB1-13) to communicate with other board cards are different. For example, when detecting ACB1, it needs to be set to the same communication channel as the on-site valve control chassis, so as to achieve the goal of comprehensively testing the software and hardware of the board card without changing the program of the board card under test.

[0043] Among them, according to Figure 3 As shown in the figure, the slots set on the first backplane 14 are the first slot 15, the second slot 16, the third slot 17, the fourth slot 18, and the fifth slot 19 in sequence. The first companion board card 6, the ACB bridge arm control board 7, the CPU main processor board 8, the AFB auxiliary function board 9, and the IO trip outlet board are inserted along the first slot 15, the second slot 16, the third slot 17, the fourth slot 18, and the fifth slot 19 in sequence.

[0044] According toFigure 4 As shown, the slots provided on the second backplane 20 are successively the sixth slot 21, the seventh slot 22, and the eighth slot 23; the second test companion board 11, the LB trigger board 12, and the VGCB pulse switching board 13 are successively inserted along the sixth slot 21, the seventh slot 22, and the eighth slot 23.

[0045] In the present invention, the first test companion board 6 has at least 6 LVDS communication channels of the backplane, 4 ST optical emission ports of the front panel, 2 ST optical reception ports, 2 Aurora high-speed optical ports, and 1 digital quantity input interface on the hardware. Through the connection of optical fibers, cables, etc., communication establishment and testing with the CPU board, ACB board, and IO board can be achieved; the second test companion board 11 has at least 14 LVDS communication channels of the backplane, 12 LC low-speed optical ports of the front panel, and 1 Aurora high-speed optical port on the hardware. Through the connection function of optical fibers, communication establishment and testing with the VGCB board and LB board can be achieved;

[0046] The present invention also provides a method for on-site testing of a flexible DC valve control board card. Based on the above-mentioned on-site testing device for a flexible DC valve control board card, it includes the following steps:

[0047] Step 1, start the testing device. When it is confirmed that the wiring of all board cards is correct and there is no abnormality in the board card to be tested, no fault information is reported on the display interface of the monitoring host 1;

[0048] Step 2, when there is an abnormality in the board card to be tested, confirm the type and number of the board card to be tested, and disconnect the corresponding wiring of the board card to be tested. Find the corresponding board card in the first board card test integration unit 4 and the second board card test integration unit 5 of the test chassis 3 according to the type and number of the board card to be tested and replace it. After replacement, restore the wiring again;

[0049] Step 3, set the test experiment of the board card to be tested through the monitoring host 1, and send an execution command to the corresponding backplane of the board card to be tested;

[0050] Step 4, start the test. When the test result shows an abnormality, return to re-execute Step 2, otherwise the test ends.

[0051] In summary, the present invention provides a flexible DC valve control board on-site testing device and testing method. By setting a first board testing integration unit, a second board testing integration unit, a first backplane, and a second backplane in the testing chassis; the first board testing integration unit is inserted into the slot in the first backplane and is communicatively connected to the monitoring host through a network switch; the second board testing integration unit is inserted into the slot in the second backplane and is communicatively connected to the monitoring host through a network switch. In the test environment formed by other boards of the valve control, the first board testing integration unit and the second board testing integration unit in the testing chassis can be correspondingly communicatively connected to the monitoring host through the first backplane and the second backplane via the network switch, and the monitoring host can detect the board under test in the first board testing integration unit and the second board testing integration unit. Without changing the program of the spare board and the test environment formed by other boards of the valve control, the health status of a single spare board can be quickly detected, and the available spare boards can be selected, shortening the repair time of the converter station.

[0052] At the same time, the valve control board to be tested can be directly replaced with the corresponding same-type board in the testing chassis for testing without changing the on-site program already burned in the board to be tested, which can ensure the correct version of the program in the board. At the same time, a single board can be detected in the test environment formed by other boards of the valve control, greatly improving the repair efficiency of the converter station.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present invention can still be modified or equivalently replaced, and any modification or equivalent replacement without departing from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A flexible DC valve control board card on-site testing device, characterized in that, It includes a monitoring host (1), a network switch (2), and a test chassis (3); a first board test integration unit (4), a second board test integration unit (5), a first backplane (14), and a second backplane (20) are provided inside the test chassis (3); the first board test integration unit (4) is inserted into a slot in the first backplane (14) and is communicatively connected to the monitoring host (1) via the network switch (2); the second board test integration unit (5) is inserted into a slot in the second backplane (20) and is communicatively connected to the monitoring host (1) via the network switch (2). The first board test integration unit (4) includes a first companion board (6), an ACB bridge arm control board (7), a CPU main processor board (8), an AFB auxiliary function board (9), and an IO trip outlet board arranged side by side in sequence; the first companion board (6), the ACB bridge arm control board (7), the CPU main processor board (8), the AFB auxiliary function board (9), and the IO trip outlet board are inserted into the slots of the first backplane (14) in sequence. The second board test integration unit (5) includes a second companion board (11), an LB trigger board (12), and a VGCB pulse switching board (13) arranged in sequence; the second companion board (11), the LB trigger board (12), and the VGCB pulse switching board (13) are inserted into the slots of the second backplane (20) in sequence.

2. The flexible DC valve control board card on-site testing device according to claim 1, characterized in that, The first companion board (6) is communicatively connected to the CPU main processor board (8) via the first backplane (14); the ACB bridge arm control board (7) is communicatively connected to the CPU main processor board (8) via the first backplane (14); the AFB auxiliary function board (9) is communicatively connected to the CPU main processor board (8) via the first backplane (14); the IO trip outlet board is communicatively connected to the CPU main processor board (8) via the first backplane (14).

3. The flexible DC valve control board card on-site testing device according to claim 1, characterized in that, One side of the first companion board (6) away from the first backplane (14) is the front panel. The first companion board (6) is communicatively connected to the CPU main processor board (8) via two optical emission ports and reception ports on the front panel; the first companion board (6) is communicatively connected to the ACB bridge arm control board (7) via two Aurora optical ports on the front panel. The first companion board (6) is communicatively connected to the AFB auxiliary function board (9) via two optical emission ports on the front panel. The first companion board (6) is communicatively connected to the IO trip outlet board via (1) digital quantity input interface on the front panel. The first companion board (6) is communicatively connected to the monitoring host (1) via the Ethernet interface and network management on the front panel.

4. The flexible DC valve control board card on-site testing device according to claim 1, characterized in that, The second companion board (11) is communicatively connected to the VGCB pulse switching board via the second backplane (20); the LB trigger board is communicatively connected to the VGCB pulse switching board via the second backplane (20).

5. The flexible DC valve control board card on-site testing device according to claim 1, characterized in that, The side of the second co-tester board card (11) away from the second backplane (20) is the front panel. The 12 LC slow-speed optical transceiver interfaces on the front panel of the second co-tester board card (11) are communicatively connected to the 12 LC slow-speed optical receiving and transmitting ports of the LB trigger board through optical fibers. The front panel of the second co-tester board card (11) is communicatively connected to the monitoring host (1) through an Ethernet interface and a gateway.

6. The flexible DC valve control board card on-site testing device according to claim 1, characterized in that, The side of the VGCB pulse switching board away from the second backplane (20) is the front panel. One Aurora optical port on the front panel of the VGCB pulse switching board is communicatively connected to the ACB bridge arm control board through an optical fiber. Another Aurora optical port is communicatively connected to the first co-tester board card (6) through an optical fiber.

7. The flexible DC valve control board card on-site testing device according to claim 1, characterized in that, The first backplane (14) and the second backplane (20) adopt the FPGA + PowerPC architecture, and the communication between the first backplane (14) and the second backplane (20) is both received and transmitted through the FPGA.

8. A flexible DC valve control board card on-site testing method, based on the flexible DC valve control board card on-site testing device according to any one of claims 1-7, characterized in that, It includes the following steps: Step 1: Start the test device. When it is confirmed that all board card wirings are correct and there is no abnormality in the board card under test, there is no fault information reported on the display interface of the monitoring host (1). Step 2: When there is an abnormality in the board card under test, confirm the type and number of the board card under test, disconnect the corresponding wiring of the board card under test, find the corresponding board card in the first board card test integration unit (4) and the second board card test integration unit (5) of the test chassis (3) according to the type and number of the board card under test and replace it, and then restore the wiring again after replacement. Step 3: Set the test experiment of the board card under test through the monitoring host (1) and send an execution command to the corresponding backplane of the board card under test. Step 4: Start the test. When the test result shows an abnormality, return to step 2 and execute it again. Otherwise, the test ends.

Images