Method for automatically setting serial networking communication address of low-pressure pressurizing device and low-pressure pressurizing device

Abstract

The invention relates to an automatic setting method for a serial networking communication address of a low-voltage pressurization device and the low-voltage pressurization device. After a first switch module receives an initial communication address, the communication address of the first switch module is updated to the initial communication address; the initial communication address is changed, so that the changed communication address is different from the unchanged communication address, and the changed communication address is sent to the switch module connected with the first switch module; and updating the communication address from the second switch module according to a similar mode: after the switch module receives the communication address sent by the previous switch module, updating the communication address of the switch module into the received communication address, and further performing change processing on the updated communication address. And sending the changed communication address to the switch module which is connected with the switch module and is not updated in communication address. Batch testing is carried out on the corresponding sub-modules based on the communication addresses, manpower is saved, cost is reduced, and meanwhile the error probability is extremely low.

Description

Technical Field

[0001] The present invention relates to a method for automatically setting a serial networking communication address of a low-voltage boosting device and a low-voltage boosting device, belonging to the technical field of high-voltage direct current transmission. Background Art

[0002] With the application and development of power electronics technology in power systems, power electronics are moving towards high-voltage modular cascades, particularly in flexible direct current (HVDC) transmission technology. During the operation of flexible direct current (HVDC) transmission projects, each bridge arm of a converter valve is often composed of hundreds of submodules (which can be in half-bridge or full-bridge topologies) connected in series. This results in a significant workload for testing power modules during construction and annual maintenance of transmission projects. Using a low-voltage booster device to test power modules can significantly improve testing efficiency. A low-voltage booster device typically includes a DC power supply and a switch module. The switch module typically includes a controller, a communication module, an input interface, an output interface, and a switch unit. The communication module is typically an optical communication module, while the switch unit can be a mechanical switch or an IGBT. The controller communicates with other devices requiring communication (such as other switch modules and valve control devices) through the communication module. The switch unit is connected in parallel with the output of the submodule. The controller controls the connection of the switch unit to bypass the parallel submodule when necessary.

[0003] For a half-bridge submodule topology, when using a low-voltage booster to test a submodule, the insulated gate bipolar transistor (IGBT) at both ends of the power module's lower tube must be properly connected to the input and output interfaces of the switch module to charge the power module within the submodule. Furthermore, the low-voltage booster's control of the switch module must be coordinated with the power modules within the submodule to charge the target power module capacitor. The submodule contains a large number of power modules and corresponding switch modules, and the power modules are connected in series. Testing all submodules simultaneously requires excessively high power supply voltage, making it difficult to implement. Therefore, power modules are tested in batches, and batch testing of power modules is achieved by controlling the switch units within the corresponding batches. If the communication address of the corresponding switch module is incorrect or duplicated during testing, the low-voltage booster's submodule testing process will fail. Therefore, it is necessary to ensure that the communication address of the switch module corresponding to each submodule within the low-voltage booster is correct and unique.

[0004] In actual production scenarios, the switch module and power module are typically mapped manually by manually setting a unique communication address for each power module. However, due to the large number of power modules, manual configuration is difficult, time-consuming, prone to errors, and increases unnecessary costs. Summary of the Invention

[0005] The purpose of the present invention is to provide a method for automatically setting the serial networking communication address of a low-voltage pressurizing device and a low-voltage pressurizing device, so as to solve the problem that when the low-voltage pressurizing device is used to test the sub-modules, a unique corresponding communication address is manually set for a large number of sub-modules, which consumes a lot of time and is prone to errors.

[0006] To achieve the above object, the solution of the present invention includes: The method for automatically setting the serial networking communication address of a low-voltage pressurizing device of the present invention comprises the following steps: After receiving the communication address, each switch module in the low-voltage pressurizing device updates its communication address to the received communication address; and when there is a switch module connected to the switch module and whose communication address has not been updated, the received communication address is changed so that the changed communication address is different from the communication address of the switch module whose communication address has been updated, and then the changed communication address is sent to the switch module connected to the switch module and whose communication address has not been updated; Among them, all the switch modules are connected in a hand-in-hand manner. If it is the first switch module, the received communication address is the starting communication address of the communication network where the switch module is located.

[0007] Furthermore, the change process means that the communication address after the change is the communication address before the change plus 1.

[0008] Furthermore, the latest communication addresses of all switch modules are displayed.

[0009] The low-voltage pressurizing device of the present invention includes switch modules connected in a hand-in-hand manner: The switch module is configured to: upon receiving the communication address, update its communication address to the received communication address; and, if there is a switch module connected to the switch module and whose communication address has not been updated, change the received communication address so that the changed communication address is different from the communication address of the switch module whose communication address has been updated, and then send the changed communication address to the switch module connected to the switch module and whose communication address has not been updated; If it is the first switch module, the received communication address is the starting communication address of the communication network where the switch module is located.

[0010] Furthermore, the communication address after the change is the communication address before the change plus 1.

[0011] Furthermore, the low-voltage pressurizing device also includes a display module, which is used to display the latest communication addresses of all switch modules.

[0012] The beneficial effects of the present invention are: The present invention relates to a method for automatically setting the serial networking communication address of a low-voltage pressurizing device and a low-voltage pressurizing device. In the low-voltage pressurizing device, after receiving the communication address, the switch modules connected in a hand-in-hand manner update their communication addresses to the received communication addresses, wherein the communication address received by the first switch module is the starting communication address of the communication network where the switch module is located. When there is a switch module connected to the switch module and whose communication address has not been updated, the received communication address is changed so that the changed communication address is different from the communication address of the switch module with the updated communication address, so as to ensure that each switch address has a unique corresponding communication address, and then the changed communication address is sent to the switch module connected to the switch module and whose communication address has not been updated, thereby achieving a unique corresponding communication address for each switch module, avoiding the occurrence of communication address conflicts, and facilitating the subsequent low-voltage pressurizing device to test the submodules. The low-voltage pressurizing device can control the switch modules in batches based on the communication addresses to test the submodules in electrical equipment such as the converter valve corresponding to the switch modules, greatly reducing the time required to configure the communication address, saving labor costs, and having an extremely low probability of error. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a flow chart of the method for automatically setting the serial networking communication address of the low-voltage pressurizing device of the present invention; Figure 2 It is a schematic diagram of the serial networking of the low-voltage pressurizing device and the switch module of the present invention; Figure 3 This is a diagram showing the actual scenario of serial networking of switch modules in the low-voltage boosting device of the present invention; Figure 4 This is a diagram of an actual scenario in which the low-voltage pressurizing device of the present invention tests the submodules through the switch module. DETAILED DESCRIPTION

[0014] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is described in detail below in detail with reference to the accompanying drawings.

[0015] The concept of this invention is to automatically update the communication addresses of each switch module. Specifically, the communication address of one switch module is updated first, and then a new communication address that is different from all previously updated communication addresses is assigned to the next switch module. This achieves a unique, one-to-one correspondence between each switch module. This significantly reduces the time required to set communication addresses for each switch module, reduces labor costs, and minimizes the probability of errors.

[0016] An implementation method for automatically setting the serial networking communication address of a low-voltage booster device: like Figure 2As shown, the low-voltage pressurizing device of the present invention includes switch modules connected in a hand-in-hand manner, and the switch module includes a controller, a communication module, an input interface, an output interface, and a switch unit, etc. The switch modules at the head and tail positions are connected to the valve control device through optical fibers. When the low-voltage pressurizing device tests the submodule, the input interface and the output interface of the switch module are correspondingly connected in parallel to the output end and the input end of the corresponding submodule. The switch modules are connected hand-in-hand through optical fibers, wherein the first and the last switch modules are connected to the valve control device through optical fibers to exchange data, and the switch modules connected to each other also transmit information to each other through optical fibers. The communication address of the switch module in the low-voltage pressurizing device is the unique identifier of the switch module, and the valve control device controls the switch module based on the communication address of the switch module.

[0017] When using a low-voltage pressurization device to test submodules, the submodules are tested in batches. The low-voltage pressurization device specifies the communication address of the switch module corresponding to the submodule to be tested in the test instruction, and sends the test instruction to the first switch module via optical fiber. After receiving the test instruction, the first switch module reads the communication address in the test instruction and compares it with the communication address stored in its own flash memory. If there is a mismatch, the test instruction is forwarded to the next-level switch module via optical fiber. If the comparison is consistent, the switch module disconnects the switch unit and performs a pressure test on the submodules connected in parallel. The above steps are performed in sequence. If the submodules in the batch are all working normally, the valve control device will receive the test instruction forwarded by the last switch module. If a problem occurs during the test of a batch of submodules, the valve control device detects the abnormal submodule. The low-voltage pressurization device tests the submodules in batches until all submodules are tested.

[0018] When setting the communication address of the switch module, it is necessary to be able to automatically set the IP address of the switch module quickly and accurately. Regarding the setting and updating of the communication address, specifically: after receiving the corresponding communication address, each switch module in the low-voltage pressurizing device updates its communication address to the received communication address. Among them, if it is the first switch module, the address it receives is the starting address of the communication network where all switch modules are located, which is issued by the valve control device. If it is not the first switch module, the address it receives is the communication address sent by the previous switch module. For each switch module, if there is a switch module connected to the switch module and the communication address has not been updated, the received communication address is changed so that the changed communication address is different from the communication address of the switch module with the updated communication address, and then the changed communication address is sent to the switch module connected to the switch module and the communication address has not been updated; if there is no switch module connected to the switch module and the communication address has not been updated, it indicates that the switch module is the last switch module in the hand-in-hand connection. At this time, there is no switch module with an unupdated communication address, and there is no need to perform the "change process" mentioned above.

[0019] The present invention will be further described in detail below using an IP address as a specific embodiment of the communication address, wherein the measured object is a submodule in a converter valve, and each submodule in the converter valve has a half-bridge topology.

[0020] like Figure 1 As shown, the method for automatically setting the IP address of the switch module of the low-voltage pressurizing device of the present invention includes the following steps: 1) When the IP address needs to be set, the communication network starting IP address and IP address update instruction issued by the valve control device are sent to the switch module directly connected to the valve control device, that is, the first switch module. After the first switch module receives the starting IP address and IP address update instruction, the first switch module determines whether the received IP address is consistent with the previous switch module IP address stored in the flash. If they are consistent, the most recently received switch module IP address is not saved in the flash; if they are inconsistent, the switch module calls the flash interface, stores the new switch module IP address in the flash and overwrites the switch module IP address previously stored in the flash as the IP address of this switch module.

[0021] 2) After the first switch module completes IP address storage, it changes the received IP address by adding 1 to the IP address and uses it as the IP address of the next-level switch module. The newly generated IP address and address update instruction are then sent to the next-level switch module.

[0022] 3) After receiving the address update instruction and IP address, the next-level switch module sets its own IP address in the same manner as in step 1). This continues until all switch modules have completed the communication address setting. After the IP addresses of all switch modules in the communication network are set, the valve control device will receive the IP address sent by the last-level switch module, indicating that the addresses of all switch modules in the communication network are now unique.

[0023] 4) After setting the communication addresses of all switch modules, in order to facilitate use and improve human-computer interaction, the IP addresses stored in the switch module flash can be read and all switch module IP addresses can be displayed on the digital tube for easy observation during use.

[0024] In this embodiment, the specific method for changing the received IP address is to increment the current IP address by 1 and use it as the IP address of the next-level switch module. This effectively aligns the switch module serial number with the switch module IP address, facilitating control of the switch module using the corresponding IP address. As other embodiments of "changing processing," the IP address of the current switch module can also be incremented by 2 or other mathematical operations can be performed to obtain the IP address of the next-level switch module. Regardless of the mathematical operation, the goal is to ensure that the communication address of each switch module is unique and different.

[0025] An embodiment of a low-pressure pressurizing device: A low-voltage pressurizing device comprises a display module and a plurality of switch modules connected hand in hand.

[0026] The switch modules connected in a hand-in-hand manner in the low-voltage pressurizing device are all used to: after receiving an IP address and an IP address update instruction, determine whether the received IP address is consistent with the previous switch module IP address stored in the flash. If they are consistent, the most recently received switch module IP address will not be saved in the flash; if they are inconsistent, the switch module will call the flash interface to store the new switch module IP address in the flash and overwrite the switch module IP address previously stored in the flash as the IP address of the switch module; and when there is a next-level switch module connected to the switch module and whose IP address has not been updated, change the received IP address so that the changed communication address is different from the communication address of the switch module with the updated IP address. The detailed process, principle and effect of how each switch module in the pressurizing device sets the communication address have been detailed in the "Implementation Method of Automatically Setting the Communication Address of the Serial Network of the Low-Voltage Pressurizing Device" and will not be repeated in detail in this implementation method.

[0027] In this embodiment, the display module is a digital tube, which is mainly used to display the IP address stored in the flash memory of each switch module on the digital tube of the switch module, so as to facilitate observation during use.

[0028] It should be noted that the low-voltage pressurizing device of the present invention is not only used in the test of the converter valve, but is also suitable for the test of static VAR amplifiers SVG, DCDC switching power supplies, and rectifier inverter modules that require control.

[0029] Figure 3 This is a diagram showing the actual scenario of serial networking of switch modules in the low-voltage boosting device of the present invention. Figure 4 This is a diagram of an actual scenario in which the low-voltage pressurizing device of the present invention tests submodules through a switch module. In summary, the present invention sets a unique corresponding communication address for the switch module in the low-voltage pressurizing device, making it convenient for the low-voltage pressurizing device to control the corresponding switch module according to the communication address when testing the submodules, thereby performing batch testing on the submodules corresponding to these switch modules. This is simple to operate, greatly reduces the time required to configure the communication address, saves labor costs, and has an extremely low error probability, making it widely used in the testing of electrical equipment.

Claims

1. A method for automatically setting the serial networking communication address of a low-voltage pressurizing device, characterized in that: The method includes: After receiving the communication address, each switch module in the low-voltage pressurizing device updates its communication address to the received communication address; and when there is a switch module connected to the switch module and whose communication address has not been updated, the received communication address is changed so that the changed communication address is different from the communication address of the switch module whose communication address has been updated, and then the changed communication address is sent to the switch module connected to the switch module and whose communication address has not been updated; Among them, all the switch modules are connected in a hand-in-hand manner. If it is the first switch module, the received communication address is the starting communication address of the communication network where the switch module is located.

2. The method for automatically setting the serial networking communication address of a low-voltage boosting device according to claim 1, characterized in that: The change process means that the communication address after the change is the communication address before the change plus 1.

3. The method for automatically setting the serial networking communication address of a low-voltage boosting device according to claim 1 or 2, characterized in that: The method further includes: displaying the latest communication addresses of all switch modules.

4. A low-voltage pressurizing device comprising switch modules connected hand in hand, characterized in that: The switch module is configured to: upon receiving the communication address, update its communication address to the received communication address; and, if there is a switch module connected to the switch module and whose communication address has not been updated, change the received communication address so that the changed communication address is different from the communication address of the switch module whose communication address has been updated, and then send the changed communication address to the switch module connected to the switch module and whose communication address has not been updated; If it is the first switch module, the received communication address is the starting communication address of the communication network where the switch module is located.

5. The low-pressure pressurizing device according to claim 4, characterized in that: The change process means that the communication address after the change is the communication address before the change plus 1.

6. The low-pressure pressurizing device according to claim 4 or 5, characterized in that: It also includes a display module, which is used to display the latest communication addresses of all switch modules.

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