Communication link inspection method for flexible direct current converter valve submodule networking and computer equipment

Abstract

The invention belongs to the field of communication link inspection, and particularly relates to a communication link inspection method for flexible direct current converter valve submodule networking and computer equipment. And judging whether the communication link has a problem or not according to the times that the actual communication path of the communication link taking a certain sub-module in the networking unit to be checked as an end point is inconsistent with the preset shortest communication path. According to the invention, on the premise of not increasing redundant communication burden for networking, the actual path and the shortest path of the communication link taking a certain sub-module as an end point in the networking (the communication link taking the sub-module as the end point is regarded as a communication link to be checked) are compared; whether the communication link goes wrong or not is judged according to the frequency that the actual communication path is inconsistent with the preset shortest communication path, and the possible abnormal communication state of the communication link is reflected, so that the purpose of performing real-time and effective problem inspection on the communication networking link is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of communication link inspection, and in particular relates to a communication link inspection method and computer equipment for flexible direct current converter valve submodule networking. Background Art

[0002] In the field of flexible power transmission technology, modular multilevel converters (MMCs) are indispensable core equipment. However, in recent years, with the increase in flexible DC voltage levels, the number of levels has continued to increase, and the number of power sub-modules has also continued to increase. This situation will lead to a large number of optical fiber accesses between the power sub-module interface chassis and the converter valve system, resulting in negative impacts of high costs and inconvenient operation and maintenance. However, due to the limitations of direct optical fiber channels, the pulse board in the valve control system is not redundantly configured. When the pulse board fails, it will cause all the power modules under its jurisdiction to bypass, which will seriously affect the reliability of the pulse distribution link. There is also a risk of overvoltage damage to the module when the corresponding bypass switch refuses to operate.

[0003] Redundant configuration of pulse distribution links will greatly increase the cost and operation and maintenance difficulty of flexible DC pulse distribution optical fiber. A technology has proposed a flexible DC sub-module networking method that can not only solve the non-redundancy problem of pulse distribution links, but also meet the two prerequisites of not breaking the foundation of the existing communication architecture and not needing to further increase the number of pulse distribution optical fibers. This method integrates and optimizes the power modules of modular multi-level converters and the effect of optical fiber concentration through on-site networking between sub-modules, greatly reducing the configuration requirements of long-distance optical fibers, and while reducing equipment costs, it realizes redundant communication between pulse boards and power modules, improves the reliability of pulse distribution links, and improves the reliability of communication between valve control systems and sub-modules.

[0004] Although the flexible DC submodule networking method has many advantages, how to implement the communication link inspection of the network after the submodules are networked is an urgent issue; because once the communication link fails, the transmission efficiency of the network will be greatly reduced; however, since the communication link failure of the flexible DC submodule networking is difficult to detect in time by checking each node in the network, it is difficult to perform operation and maintenance on it, because after the submodules are networked, communication with the valve control is completed through equally spaced submodules. During maintenance, all submodules in the network need to be powered on to monitor the network link. When the converter valve is not powered, an external independent power supply is required to build a detection environment. The difficulty in building the detection environment leads to low efficiency of operation and maintenance, and it is difficult to ensure the reliability of communication of the networking unit. Summary of the invention

[0005] The purpose of the present invention is to provide a communication link inspection method and computer equipment for flexible DC converter valve submodule networking, so as to solve the problem that link failures of existing flexible DC submodule networking are difficult to inspect and the operation and maintenance efficiency is low.

[0006] To achieve the above-mentioned purpose, the present invention provides a communication link inspection method for flexible DC converter valve sub-module networking, which determines whether there is a problem with the communication link based on the number of times the actual communication path of the communication link with a sub-module in the networking unit to be inspected as the end point is inconsistent with the preset shortest communication path.

[0007] Beneficial effect: As a pioneering invention, the present invention, without adding redundant communication burden to the networking, compares the actual path and the shortest path of the communication link with a certain sub-module as the end point in the networking (the communication link with the sub-module as the end point is deemed to be the communication link to be checked), and determines whether there is a problem with the communication link by the number of inconsistencies between the actual communication path and the preset shortest communication path. This is equivalent to whether the communication link with a certain sub-module as the end point often fails to communicate according to the shortest path, which reflects the possible abnormal communication state of the communication link, thereby achieving the purpose of real-time and effective problem inspection of the communication networking link. Therefore, on the basis of the difficulty in setting up the detection environment, it can accurately and efficiently determine the faulty or abnormal links in the networking, which is of great help to improve the efficiency of sub-module maintenance, effectively improve the efficiency of operation and maintenance, and ensure the reliability of communication of networking units.

[0008] Furthermore, based on the number of times that the actual communication path of a communication link with a certain submodule in the networking unit to be checked as the end point is inconsistent with a preset shortest communication path, a method for determining whether there is a problem with the communication link includes: obtaining the actual communication path of the networking to be checked at different times for multiple times within a set time interval, and separately determining whether each actual communication path obtained is consistent with the corresponding shortest communication path, to obtain each judgment result; and determining whether there is a problem with the communication link based on the number of judgment results that the actual communication path obtained is consistent with the corresponding shortest communication path or the number of judgment results that the actual communication path obtained is inconsistent with the corresponding shortest communication path.

[0009] Furthermore, based on the number of judgment results that the actual communication path obtained is inconsistent with the corresponding shortest communication path, the method for judging whether there is a problem with the communication link includes: if the number of inconsistent judgment results is greater than a first problem threshold, it is determined that there is a problem with the link; the first problem threshold is less than the total number of all judgment results and is greater than or equal to 0.

[0010] Furthermore, the problem occurring in the link includes the link being in a permanent fault state; if the number of the inconsistent judgment results is greater than or equal to a first permanent fault numerical threshold, the link segment is determined to be in a permanent fault state, and the first permanent fault numerical threshold is greater than a first problem threshold and less than or equal to the total number of all judgment results.

[0011] Furthermore, the problems occurring in the link include the link being in a permanent fault state; if the ratio of the number of inconsistent judgment results to the total number of all judgment results is greater than or equal to a first permanent fault ratio threshold, then the link segment is determined to be in a permanent fault state, and the first permanent fault ratio threshold is greater than the ratio of the first problem threshold to the total number of all judgment results and is less than or equal to 1.

[0012] Furthermore, the problem occurring in the link also includes the link being in a sub-healthy or abnormal state; if the number of the inconsistent judgment results is greater than the first problem threshold and less than the first permanent fault numerical threshold, it is determined that the link is in a sub-healthy or abnormal state.

[0013] Furthermore, the problems occurring in the link also include the link being in a sub-healthy or abnormal state; if the ratio of the number of inconsistent judgment results to the total number of all judgment results is greater than or equal to the ratio of the first problem threshold to the total number of all judgment results and is less than the first permanent fault ratio threshold, then it is determined that the link is in a sub-healthy or abnormal state.

[0014] Furthermore, based on the number of judgment results that the actual communication path obtained is inconsistent with the corresponding shortest communication path, the method of judging whether there is a problem with the communication link includes: if the ratio of the number of inconsistent judgment results to the total number of all judgment results is greater than a second problem threshold, it is judged that there is a problem with the link; the second problem threshold is less than 1 and greater than or equal to 0.

[0015] Furthermore, the problem occurring in the link includes that the link is in a permanent fault state; if the ratio of the number of the inconsistent judgment results to the total number of all judgment results is greater than or equal to a second permanent fault ratio threshold, then it is determined that the link is in a permanent fault state, and the second permanent fault ratio threshold is greater than a second problem threshold and less than or equal to 1; The problem occurring on the link also includes that the link is in a permanent fault state; if the number of the inconsistent judgment results is greater than or equal to a second permanent fault numerical threshold, it is determined that the link segment is in a permanent fault state, and the second permanent fault numerical threshold is greater than the product value of the second problem threshold and the total number of all judgment results and is less than or equal to the total number of all judgment results; The problem of the link also includes that the link is in a sub-healthy or abnormal state; if the ratio of the number of inconsistent results to the total number of all judgment results is greater than the second problem threshold and less than the second permanent fault ratio threshold, it is determined that the link is in a sub-healthy or abnormal state; The problems that occur in the link also include the link being in a sub-healthy or abnormal state; if the number of inconsistent results is greater than the product of the second problem threshold and the total number of all judgment results and is less than the second permanent fault value threshold, it is determined that the link is in a sub-healthy or abnormal state.

[0016] The present invention also provides a computer device, including a processor, wherein the processor stores executable program instructions, and the executable program instructions are used to be executed to implement the communication link checking method of the network.

[0017] The computer device can achieve the same beneficial effects as the networking communication link checking method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the networking system architecture of the flexible direct current transmission converter valve submodule in the embodiment of the communication link inspection method of the flexible direct current converter valve submodule networking of the present invention; Figure 2 It is a schematic diagram of the shortest path selection in the networking of flexible direct current power transmission converter valve submodules in the embodiment of the communication link inspection method of the flexible direct current converter valve submodule networking of the present invention; Figure 3 It is a flowchart of the communication link checking method for networking in the embodiment of the communication link checking method for networking of flexible direct current converter valve submodules of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0020] Embodiment of a method for checking a communication link of a flexible DC converter valve submodule network This embodiment provides a technical solution for a communication link inspection method for a flexible DC converter valve sub-module network. The method determines whether there is a problem with the communication link based on the number of times an actual communication path of a communication link with a sub-module in the networking unit to be inspected as an end point is inconsistent with a preset shortest communication path.

[0021] like Figure 1 As shown, in this embodiment, the network to be checked is obtained by networking the flexible DC transmission converter valve submodules according to a certain rule, the submodules in each networking unit are connected to two interface boxes and four interface boards, and the interface boxes are connected to the valve control to form a networking system; refer to Figure 2 In this networking system, the upper controller is taken as the starting point, namely starting point 1, starting point 2, starting point 3, starting point 4, etc., and the modules connected to the upper controller and other modules are taken as vertices (directly represented by digital numbers, for example, the path formed by the upper controller to the node numbered 1 and then to the node numbered 1 is represented as starting point 1~1~2), forming a distance array and a tag array, and gradually updating the values ​​in the distance array until the shortest communication path from the starting point to all vertices (which can be referred to as the shortest path) is found, forming a routing table of the shortest path as shown in Table 1; each module of the networking unit uploads its actual communication path (which can be referred to as the actual path) to the valve control background, and then forms an actual routing table; the theoretical routing table is compared with the actual routing table, and then the number of results inconsistent with the shortest path and the proportion of the number of results inconsistent with the shortest path to the total number of all results are calculated.

[0022] Table 1 Submodules Shortest Path 1 Starting point 1~1 2 Starting point 1~1~2 3 Starting point 1~1~3 4 Starting point 1~2~4 …… 1n / 3 Starting point 2~1n / 3 1n / 3+1 Starting point 2-1n / 3~1n / 3+1 …… 2n / 3 Starting point 3~2n / 3 2n / 3+1 Starting point 3-2n / 3~2n / 3+1 …… n-1 Starting point 4~n~n-1 n Starting point 4~n In the above method, refer to Figure 3 , according to the number of times that the actual communication path of the communication link with a certain submodule in the networking unit to be checked as the end point is inconsistent with the preset shortest communication path, the method of judging whether there is a problem with the communication link includes: obtaining the actual communication path of the networking to be checked at different times for multiple times within a set time interval, and judging whether each actual communication path obtained is consistent with the corresponding shortest communication path, and obtaining each judgment result; judging whether there is a problem with the communication link according to the number of judgment results that the actual communication path obtained is consistent with the corresponding shortest communication path or the number of judgment results that the actual communication path obtained is inconsistent with the corresponding shortest communication path.

[0023] In the communication link inspection method for the network of the present embodiment, the method for judging whether there is a problem with the communication link is based on the number of judgment results that the actual communication path obtained is inconsistent with the corresponding shortest communication path. If the number of inconsistent judgment results is greater than a first problem threshold, it is judged that there is a problem with the link; the above-mentioned first problem threshold is less than the total number of all judgment results and is greater than or equal to 0.

[0024] The problems that occur in the link include two types: the link is in a permanent fault state, and the link is in a sub-healthy or abnormal state; if the number of the above-mentioned inconsistent judgment results is greater than or equal to the first permanent fault numerical threshold, or the ratio of the number of the above-mentioned inconsistent judgment results to the total number of all judgment results is greater than or equal to the first permanent fault ratio threshold, then it is determined that the link segment is in a permanent fault state, the first permanent fault numerical threshold is greater than the first problem threshold and less than or equal to the total number of all judgment results, and the first permanent fault ratio threshold is greater than the ratio of the first problem threshold to the total number of all judgment results and less than or equal to 1. It should be noted that the judgment conditions of "the number of the above-mentioned inconsistent judgment results is greater than or equal to the first permanent fault numerical threshold" and "the ratio of the number of the above-mentioned inconsistent judgment results to the total number of all judgment results is greater than or equal to the first permanent fault ratio threshold" are actually two basically equivalent concepts. In specific applications (i.e., determining whether the link segment is in a permanent fault state), one of the judgment conditions can be selected for judgment.

[0025] If the number of the above-mentioned inconsistent judgment results is greater than the first problem threshold and less than the first permanent fault numerical threshold, or the ratio of the number of the above-mentioned inconsistent judgment results to the total number of all judgment results is greater than or equal to the ratio of the first problem threshold to the total number of all judgment results and less than the first permanent fault ratio threshold, then it is determined that the link segment is in a sub-healthy or abnormal state. Similarly, the judgment conditions of "the number of the above-mentioned inconsistent judgment results is greater than the first problem threshold and less than the first permanent fault numerical threshold" and "the number of the above-mentioned inconsistent judgment results to the total number of all judgment results is greater than or equal to the ratio of the first problem threshold to the total number of all judgment results and less than the first permanent fault ratio threshold" are actually two basically equivalent concepts. When applied specifically (i.e., when determining whether the link segment is in a sub-healthy or abnormal state), you can select one of the judgment conditions for judgment.

[0026] In other embodiments, the problem of the link that is determined may also include only one of the link being in a permanent fault state, the link being in a sub-healthy state, or an abnormal state, which does not affect the above-mentioned determination principle.

[0027] In fact, the method of judging whether there is a problem with the communication link based on the number of judgment results that the actual communication path obtained is consistent with the corresponding shortest communication path is similar to the above-mentioned method of judging whether there is a problem with the communication link based on the number of judgment results that the actual communication path obtained is inconsistent with the corresponding shortest communication path, because the judgment logic of "if the number of inconsistent judgment results is greater than the first problem threshold, then it is judged that there is a problem with this segment of the link" is essentially equivalent to "if the number of consistent judgment results is less than or equal to the first problem threshold, then it is judged that there is a problem with this segment of the link", so the method of judging whether there is a problem with the communication link based on the number of judgment results that the actual communication path obtained is consistent with the corresponding shortest communication path can refer to the above-mentioned method of judging whether there is a problem with the communication link based on the number of judgment results that the actual communication path obtained is inconsistent with the corresponding shortest communication path, and will not be repeated here.

[0028] In this embodiment, as shown in Table 2, the time interval is set to 1 minute. If the number of judgment results that the actual communication path is inconsistent with the corresponding shortest communication path within the 1 minute is greater than or equal to the first permanent fault numerical threshold, or the ratio of the number of judgment results that the actual communication path is inconsistent with the corresponding shortest communication path to the total number of all judgment results is greater than or equal to the first permanent fault ratio threshold, then the link segment is determined to be in a permanent fault state; since in this embodiment, in addition to the permanent fault state, the problems that occur in the link also include the link being in a sub-healthy or abnormal state; then if the number of judgment results that the actual communication path is inconsistent with the corresponding shortest communication path within the 1 minute is greater than the first problem threshold and less than the first permanent fault numerical threshold, or the ratio of the number of the above-mentioned inconsistent judgment results to the total number of all judgment results is greater than or equal to the ratio of the first problem threshold to the total number of all judgment results and less than the first permanent fault ratio threshold, then the link segment is determined to be in a sub-healthy or abnormal state.

[0029] Table 2 Submodules Optimal Path Actual path Number of inconsistencies between the shortest path in 1 minute and the actual path 1-minute shortest path - number of actual path inconsistencies / total number of results * 100% 1 Starting point 1~1 Starting point 1~1 0 0 2 Starting point 1~1~2 Starting point 1~3~4~2 100 0.83‱ 3 Starting point 1~1~3 Starting point 1~1~3 0 0 …… n Starting point 4~n Starting point 4~n 0 0 As shown in Table 2, taking the total number of all results as 1200000, the first problem threshold as 60, the first permanent fault numerical threshold as 1080000, and the first permanent fault ratio threshold as 90% as an example, within the set time interval of 1 minute, the shortest path of submodule No. 2: starting point 1~1~2 is inconsistent with the actual path: starting point 1~3~4~2, and the number of inconsistencies (i.e., the number of inconsistent results) is 100 times, and the proportion of the number of inconsistent results to the total number of all results is 0.83‱. Since the number of results in which the actual path of submodule No. 2 is inconsistent with the shortest path within the set time interval of 1 minute is greater than the first problem threshold, it is determined that there is a problem with the link segment at this time, but the number of inconsistent results does not reach the first permanent fault numerical threshold, and the proportion of the number of inconsistent results to the total number of all results does not reach the first permanent fault ratio threshold, indicating that submodule No. 2 is in a sub-healthy or abnormal state.

[0030] In other embodiments, whether there is a problem with the communication link can also be determined by the ratio between the number of judgment results that the actual communication path is inconsistent with the corresponding shortest communication path and the total number of all judgment results. Specifically, based on the number of judgment results that the actual communication path is inconsistent with the corresponding shortest communication path, the method of determining whether there is a problem with the communication link includes: if the ratio of the number of inconsistent judgment results to the total number of all judgment results is greater than a second problem threshold, it is determined that there is a problem with the link segment; the above-mentioned second problem threshold is less than 1 and greater than or equal to 0.

[0031] In the case of judging whether a communication link has a problem by the second problem threshold, the problems of the link can also include the link being in a permanent fault state, the link being in a sub-healthy or abnormal state. If the ratio of the number of the above-mentioned inconsistent judgment results to the total number of all judgment results is greater than or equal to the second permanent fault ratio threshold, or the number of the above-mentioned inconsistent judgment results is greater than or equal to the second permanent fault numerical threshold, then the link is judged to be in a permanent fault state, the second permanent fault ratio threshold is greater than the second problem threshold and less than or equal to 1, and the second permanent fault numerical threshold is greater than the product of the second problem threshold and the total number of all judgment results and less than or equal to the total number of all judgment results. It should be noted that the judgment conditions of "the ratio of the number of the above-mentioned inconsistent judgment results to the total number of all judgment results is greater than or equal to the second permanent fault ratio threshold" and "the number of inconsistent judgment results is greater than or equal to the second permanent fault numerical threshold" are actually two basically equivalent concepts. In specific application (i.e., judging whether the link is in a permanent fault state), one of the judgment conditions can be selected for judgment.

[0032] If the ratio of the number of the above-mentioned inconsistent results to the total number of all judgment results is greater than the second problem threshold and less than the second permanent fault ratio threshold, or the number of the above-mentioned inconsistent results is greater than the product of the second problem threshold and the total number of all judgment results and less than the second permanent fault value threshold, then it is determined that the link segment is in a sub-healthy or abnormal state. Similarly, the judgment conditions of "the ratio of the number of the above-mentioned inconsistent results to the total number of all judgment results is greater than the second problem threshold and less than the second permanent fault ratio threshold" and "the number of the above-mentioned inconsistent results is greater than the product of the second problem threshold and the total number of all judgment results and less than the second permanent fault value threshold" are actually two basically equivalent concepts. When applied specifically (i.e., when judging whether the link segment is in a sub-healthy or abnormal state), just select one of the judgment conditions for judgment.

[0033] Specifically, the second permanent fault ratio threshold value may be the same as the first permanent fault ratio threshold value, and the second permanent fault numerical threshold value may be the same as the first permanent fault numerical threshold value. For example, when the total number of all results is 1,200,000, the second permanent fault ratio threshold value is set to 90%, and the second permanent fault numerical threshold value is set to 1,080,000.

[0034] In summary, since the present invention can obtain the actual path at the current moment and compare and determine the fault with the shortest path, and can accurately determine different fault degrees by setting thresholds of different sizes, and the present invention judges whether each actual communication path obtained is consistent with the corresponding shortest communication path by using two different angles of judgment criteria, and realizes the problem judgment of the communication link in different judgment methods corresponding to two problem thresholds, these two methods can be flexibly selected, so the main advantages of the present invention are the real-time completion of problem judgment, the flexibility of different judgment methods corresponding to two problem thresholds, and the richness of sampling samples. By adopting the method of the present invention, it is possible to simply and efficiently realize the fault inspection of the communication networking link, so as to ensure the safe and stable operation of the networking communication, thereby greatly improving the efficiency of operation and maintenance, that is, to provide a reliable and feasible solution to the problem of difficult operation and maintenance of the networking unit, thereby effectively improving the efficiency of operation and maintenance.

[0035] Computer device embodiment This embodiment provides a computer device, including a processor, in which executable program instructions are stored, and the executable program instructions are used to be executed to implement the communication link checking method for the flexible direct current converter valve sub-module network in the above-mentioned embodiment of the communication link checking method for the flexible direct current converter valve sub-module network.

[0036] Since the working principle and working process of the computer device have been described in detail in the above-mentioned communication link inspection method embodiment of the flexible direct current valve submodule network, it will not be repeated here. The present invention is not limited to the described implementation mode. For ordinary technicians in this field, according to the teachings of the present invention, the various deformed models, formulas, and parameters designed do not require creative labor. Changes, modifications, substitutions, and variations of the implementation modes without departing from the principles and spirit of the present invention still fall within the scope of protection of the present invention.

Claims

1. A communication link inspection method for flexible direct current valve submodule networking, characterized in that: Whether a problem occurs in a communication link is determined based on the number of times that an actual communication path of a communication link with a submodule in the networking unit to be checked as an end point is inconsistent with a preset shortest communication path.

2. The communication link inspection method for flexible direct current converter valve submodule networking according to claim 1 is characterized in that: A method for determining whether a problem occurs in a communication link based on the number of times that an actual communication path of a communication link with a certain submodule in a networking unit to be checked as an end point is inconsistent with a preset shortest communication path includes: obtaining the actual communication path of the networking to be checked at different times for multiple times within a set time interval, and respectively determining whether each actual communication path obtained is consistent with the corresponding shortest communication path, to obtain each judgment result; and determining whether a problem occurs in the communication link based on the number of judgment results that the actual communication path obtained is consistent with the corresponding shortest communication path or the number of judgment results that the actual communication path obtained is inconsistent with the corresponding shortest communication path.

3. The communication link inspection method for flexible direct current converter valve submodule networking according to claim 2 is characterized in that: The method of judging whether there is a problem with the communication link based on the number of judgment results that the actual communication path obtained is inconsistent with the corresponding shortest communication path includes: if the number of inconsistent judgment results is greater than a first problem threshold, it is determined that there is a problem with the link; the first problem threshold is less than the total number of all judgment results and greater than or equal to 0.

4. The communication link inspection method for flexible direct current converter valve submodule networking according to claim 3 is characterized in that: The problems that occur in the link include the link being in a permanent fault state; if the number of inconsistent judgment results is greater than or equal to the first permanent fault numerical threshold, then the link is determined to be in a permanent fault state, and the first permanent fault numerical threshold is greater than the first problem threshold and less than or equal to the total number of all judgment results.

5. The communication link inspection method for flexible direct current converter valve submodule networking according to claim 3 is characterized in that: Problems that occur in the link include the link being in a permanent fault state; if the ratio of the number of inconsistent judgment results to the total number of all judgment results is greater than or equal to a first permanent fault ratio threshold, then the link is determined to be in a permanent fault state, and the first permanent fault ratio threshold is greater than the ratio of the first problem threshold to the total number of all judgment results and is less than or equal to 1.

6. The communication link inspection method for flexible direct current valve submodule networking according to claim 4 or 5, characterized in that: Problems with the link also include the link being in a sub-healthy or abnormal state; if the number of inconsistent judgment results is greater than the first problem threshold and less than the first permanent fault value threshold, it is determined that the link is in a sub-healthy or abnormal state.

7. The communication link inspection method for flexible direct current converter valve submodule networking according to claim 4 or 5, characterized in that: Problems with the link also include the link being in a sub-healthy or abnormal state; if the ratio of the number of inconsistent judgment results to the total number of all judgment results is greater than or equal to the ratio of the first problem threshold to the total number of all judgment results and is less than the first permanent fault ratio threshold, then it is determined that the link is in a sub-healthy or abnormal state.

8. The communication link inspection method for flexible direct current converter valve submodule networking according to claim 2 is characterized in that: The method of judging whether a problem occurs in the communication link based on the number of judgment results that the actual communication path obtained is inconsistent with the corresponding shortest communication path includes: if the ratio of the number of inconsistent judgment results to the total number of all judgment results is greater than a second problem threshold, then it is judged that a problem occurs in the link segment; the second problem threshold is less than 1 and greater than or equal to 0.

9. The communication link inspection method for flexible direct current converter valve submodule networking according to claim 8 is characterized in that: The problem of the link includes that the link is in a permanent fault state; if the ratio of the number of the inconsistent judgment results to the total number of all judgment results is greater than or equal to a second permanent fault ratio threshold, then it is determined that the link is in a permanent fault state, and the second permanent fault ratio threshold is greater than the second problem threshold and less than or equal to 1; The link problem also includes the link being in a permanent failure state; If the number of the inconsistent judgment results is greater than or equal to the second permanent fault numerical threshold, it is determined that the link segment is in a permanent fault state, and the second permanent fault numerical threshold is greater than the product of the second problem threshold and the total number of all judgment results and is less than or equal to the total number of all judgment results; The link problem also includes the link being in a sub-healthy or abnormal state; If the ratio of the number of inconsistent results to the total number of all judgment results is greater than the second problem threshold and less than the second permanent fault ratio threshold, it is determined that the link segment is in a sub-healthy or abnormal state; The link problem also includes the link being in a sub-healthy or abnormal state; If the number of inconsistent results is greater than the product of the second problem threshold and the total number of all judgment results and is less than the second permanent fault value threshold, it is determined that the link segment is in a sub-healthy or abnormal state.

10. A computer device comprising a processor, characterized in that: The processor is used to execute a computer program to implement the steps of the communication link checking method for flexible direct current converter valve submodule networking as described in any one of claims 1-9.

Images