Digital converter station fault information collection method and system

Abstract

The invention relates to a digital converter station fault information collection method and system, and belongs to the technical field of digital converter stations. According to the method, when the set event of the digital converter station is received, the fault event can be automatically searched through time relevance, the subsystem can be directly associated based on the fault event, the associated data is automatically searched by taking the remote signaling change and the remote measurement change rate of the subsystem as the judgment basis of the search process, and the fault event can be automatically searched. The whole process can be automatically realized, manual layer-by-layer judgment and manual judgment are not needed, the search process is simplified, the search efficiency is improved, and the completeness of the searched data can be ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of digital converter station fault information collection method and system, belong to digital converter substation technical field. BACKGROUND

[0002] In the process of promoting digital construction of power grid, as an important part in power system, UHVDC transmission carries out many aspects of work in digital construction. Among them, digital converter station is a great achievement of power grid digital construction. Digital converter station accesses the full quantum system data of converter station, realizes the unified export of station end full quantum data, and at the same time, access to provincial side and cloud PMS control system can provide equipment current and historical defect hidden danger information query ability.

[0003] After the existing fault occurs, the conventional fault information analysis process is as follows: as shown in the figure, Figure 1 The SCADA system provided by the control protection system sends fault event, and the user can receive the fault event through the SCADA system and the digital converter station; through event description, the corresponding subsystem is positioned in the digital converter station, such as "stabilizing pump pressure is too high", the user will open the valve cooling page to view related information in the SCADA system according to the information, if the related information is not found, the user will go to the independent valve cooling system to view the related information; the valve cooling system prompts that the temperature sensor temperature is too high; the user views the temperature alarm information through infrared temperature measurement or temperature and humidity subsystem to analyze the fault. Due to the performance limitation of the control protection system, only a small amount of key information is accessed to provide monitoring and maintenance index information for the user, and after the fault occurs, the relevant key events are needed as the starting point to analyze and collect fault information layer by layer.

[0004] Therefore, after the fault occurs, the fault information search needs to be carried out layer by layer, and each subsystem needs to be viewed separately, so that the whole search process is time-consuming and low in efficiency. And due to the complex relationship between subsystems, the user needs to have a clear understanding of the structure of each subsystem to correctly analyze the fault and collect the fault information, which is high in requirement for the user and difficult to realize. SUMMARY

[0005] The purpose of the present application is to provide a kind of digital converter station fault information collection method and system, to solve the problem of long time-consuming, low efficiency and high requirement for user of current fault information collection.

[0006] The present application provides a kind of digital converter station fault information collection method to solve the above technical problems, which comprises the following steps:

[0007] 1) when receiving a setting event of a digital converter station, inquiring whether a fault event occurs within a first setting time period before the setting event, saving all inquired fault events into an event list; wherein the setting event refers to a fault level reaching a certain level or a specified event needing separate processing;

[0008] 2) traversing the fault events in the event list, inquiring remote signaling and telemetry data within a second setting time period before the fault event according to a subsystem to which the fault event belongs;

[0009] 3) taking the remote signaling data changed within the second setting time period before the fault event and the telemetry data with a change rate exceeding a setting threshold as associated data of the fault event, and taking the fault events in the event list and the corresponding associated data as all fault information related to occurrence of the received setting event.

[0010] Further, the fault event inquiry in the step 1) is performed in a recursive upward manner: if a fault event occurs within the first setting time period before the setting event, the fault event occurrence time is recursively inquired upward, it is judged whether a fault event occurs within the first setting time period before the fault event, if a fault event occurs, the fault event is continuously inquired upward, until no fault event occurs.

[0011] Further, the fault event inquired in the step 1) refers to a slight fault event.

[0012] Further, the method further comprises visualizing the recorded all fault information.

[0013] Further, when visualizing, the recorded all fault information is displayed in a fishbone diagram or a block diagram according to an event occurrence sequence, and the displayed event further comprises associated data corresponding to the event.

[0014] The application further provides a digital converter station fault information collection system, which is used in communication connection with a digital converter station, when receiving a setting event of the digital converter station, inquires whether a fault event occurs within a first setting time period before the setting event, saves all inquired fault events into an event list; wherein the setting event refers to a fault level reaching a certain level or a specified event needing separate processing; traverses the fault events in the event list, inquires remote signaling and telemetry data within a second setting time period before the fault event according to a subsystem to which the fault event belongs; takes the remote signaling data changed within the second setting time period before the fault event and the telemetry data with a change rate exceeding a setting threshold as associated data of the fault event, and takes the fault events in the event list and the corresponding associated data as all fault information related to occurrence of the received setting event.

[0015] Furthermore, the fault information collection system performs fault event queries in a recursive upward manner: if a fault event occurred within a first set time period before the occurrence of a set event, then the system recursively queries upward based on the time of occurrence of the fault event to determine whether any other fault events occurred within the first set time period before the occurrence of the fault event. If any other fault events occurred, the system continues to query upward for the fault events that have occurred until no more fault events are found.

[0016] Furthermore, the fault information collection system also includes a display module, which is used to display all the obtained fault information in a visual manner.

[0017] Furthermore, when the display module performs visualization, it displays all the recorded fault information in the order of the events occurring in a fishbone diagram or block diagram, and the displayed fault events also include the associated data corresponding to the fault events.

[0018] Furthermore, the fault information collection system obtains events through the unified data query and subscription interface provided by the digital converter station.

[0019] The beneficial effects of this invention are as follows: When receiving a setting event from a digital converter station, this invention first utilizes the temporal correlation of fault events to search for fault events that are temporally correlated with the setting event. Then, it queries the subsystem to which the searched fault events belong, querying the telemetry data of the subsystem that changed within a certain period before the occurrence of the fault event and whose change rate meets the requirements. This data is used as the associated data of the fault event. Finally, all the searched fault events and their corresponding associated data are used as all fault information related to the occurrence of the received setting event. As can be seen from the above process, this invention can automatically search for fault events through temporal correlation and can directly associate fault events with their respective subsystems. It automatically searches for associated data based on the changes in telemetry and telemetry change rates of the subsystems. The entire process is automated, eliminating the need for manual layer-by-layer judgment and simplifying the search process, improving search efficiency, and ensuring the integrity of the searched data. Attached Figure Description

[0020] Figure 1 This is a structural block diagram of an existing converter station;

[0021] Figure 2 This is a block diagram of the converter station structure used in this invention;

[0022] Figure 3 This is a flowchart of the digital converter station fault information collection method of the present invention. Detailed Implementation

[0023] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0024] This invention can automatically search for fault events based on temporal correlation, and can directly associate fault events with their respective subsystems. It can automatically search for related data based on the changes in remote signaling and telemetry of the respective subsystems, thereby simplifying the search process.

[0025] Implementation of a Digital Converter Station Fault Information Collection System

[0026] This invention provides a fault information collection system for communication with a digital converter station. When a set event is received from the digital converter station, the system queries whether a fault event occurred within a first set time period prior to the set event, and saves all retrieved fault events to an event list. It then iterates through the fault events in the event list, querying telemetry and teleindication data within a second set time period prior to the fault event based on the subsystem to which the fault event belongs. The system uses telemetry and teleindication data that changed between the time of the fault event and the second set time period prior to the event, and data whose change rate exceeded a set threshold, as associated data for the fault event. The system considers the fault events in the event list and their corresponding associated data as all fault information related to the received set event. The judgment of telemetry and teleindication data can be performed simultaneously. The implementation flow of this method is as follows: Figure 3 As shown below, a detailed explanation will follow.

[0027] like Figure 2As shown, the fault information collection system of this invention is communicatively connected to the digital converter station to acquire information from the digital converter station. The digital converter station in this invention is connected to all converter station subsystems, enabling it to acquire data from all subsystems. These subsystems include a control and protection system, a valve cooling system, an SF6 monitoring system, a surge arrester monitoring system, an air conditioning system, a temperature and humidity detection system, and a station power information system. The control and protection system is responsible for the operation control, equipment protection, and safe and stable operation of the converter station. Common faults typically involve small faults triggering larger ones, such as alarms from certain devices or sensor over-limit events, leading to a series of subsequent faults. By statistically analyzing the control and protection system's standard judgment intervals, a default filtering interval of two minutes is used. In fault scenarios where large systems interact, users can also filter historical information based on custom time intervals and triggering events, significantly reducing the error rate of manually sorting fault information. Traditional converter station monitoring systems, due to performance and security considerations, cannot perform large-scale time-series data caching and storage, and can only store a small amount of critical data. In contrast, the digital converter station of this invention is set up in four zones, aggregating all converter station data, which allows for the convenient establishment of time-series and large real-time databases for longer-term data caching and easier data retrieval. The digital converter station can store the acquired information from each subsystem in the digital converter station data pool. In this embodiment, the fault information collection system acquires information through a unified data query and subscription interface provided by the digital converter station. The information to be acquired is divided into three categories: remote signaling, telemetry, and events. Among these, events have rich content in the digital converter station. Based on each subsystem, the digital converter station has established advanced applications for each subsystem, such as the converter transformer equipment platform, measurement device equipment platform, valve cooling equipment platform, GIS and through-wall bushing equipment platform, etc. This platform only focuses on the data of its own system and provides alarm information independent of the converter station monitoring system when data exceeds limits or shows abnormal trends. These alarm information are published to the digital converter station system through the digital converter station message framework, and all applications can subscribe to and consume these alarm information. The digital converter station platform hosts various applications that further process equipment information. These applications can also publish events on the digital converter station. Events are categorized into four levels: general, minor, severe, and urgent. Each event includes a "system source" field. Events are also divided into a separate category: [list of categories]. Figure 1Events generated by various subsystems and monitoring systems are categorized into four zones: alarm events generated by various advanced applications of the digital converter station based on data and their respective algorithms. The fault information collection system subscribes to all events of the digital converter station. When a set event is received, the fault information collection process is initiated. After initiating the collection process, the system performs event and remote signaling queries by time layer. Based on the retrieved related events and remote signaling changes, it further queries the telemetry data of the subsystems associated with the event and remote signaling, ultimately collecting all fault data related to the set event. Events are definable; users can choose the time to trigger this logic, but subsequent collection logic is still processed according to event level. Only the initial logic can be customized, defaulting to triggering at a severe or urgent level. In this embodiment, a set event refers to a fault level reaching a certain level or a specified event requiring separate handling. For example, a fault level reaching a certain level refers to severe or urgent. This embodiment defaults to initiating the fault information collection process upon receiving a severe or urgent event. Alternatively, when it is necessary to handle individual general events, the set event can also be a general event requiring separate handling. This invention allows modification of the received event level and addition of individual general events that require separate processing by changing the options.

[0028] The workflow of the fault information collection system is as follows: Figure 3 As shown below, its workflow will be explained in detail.

[0029] 1) The fault information collection system determines whether the subscribed events are setting events for the digital converter station.

[0030] In this invention, the fault information collection system obtains information through a subscription interface. Therefore, the fault information collection system can use its subscription service to obtain all events and determine whether the obtained events are set events. In this embodiment, set events refer to events with a fault level of serious or urgent.

[0031] 2) Query for fault events related to this setting event.

[0032] Digital converter stations currently only have four event levels: minor, severe, and urgent. Because the default setting is either severe or urgent, only minor and minor events remain unmonitored. Minor events typically lack value for fault analysis. If users manually set the fault retrieval level to minor, the logic will loop indefinitely until the event interval exceeds two minutes, generating a large number of useless events. Users can define urgent triggers and retrieve information using combinations of minor, severe, or minor + severe events, making it easier to collect relevant information.

[0033] Once the subscription service of the fault information collection system receives a set event, it automatically queries whether a fault event (in this embodiment, a minor event) has occurred within a first set time period (e.g., two minutes) before the occurrence of the set event. If so, it recursively queries upwards based on the time of the minor event until no more minor fault levels are found in the event query. All retrieved fault events and their occurrence times are then saved to the fault event list. For example, if the fault information collection system receives a critical event A, it determines whether a minor event has occurred within two minutes before the occurrence of critical event A. If a minor event a has occurred within two minutes before the occurrence of critical event A, it continues to query upwards for minor event a, determining whether a minor event b has occurred within two minutes before the occurrence of minor event b, and so on, until no minor events have occurred.

[0034] Through this process, the present invention can query fault events related to the received set event. The query time (first set time period) can be set according to the actual situation. It should not be too long or too short, as long as it can reflect the temporal correlation with the set event. The fault event (minor event in this embodiment) can also be specified by the user as needed.

[0035] In another embodiment, when querying fault events, it is not necessary to use the upward query method. Instead, it is only necessary to query whether a fault event has occurred within two minutes before the time of the set event. If a fault event has occurred, then the fault event can be regarded as an associated event of the set event, which can reduce the search volume.

[0036] 3) Traverse the list of fault events and query the remote signaling data that has changed.

[0037] For each fault event in the fault event list, iterate through the subsystem to which each fault event belongs, query the remote signaling of the subsystem within the second set time period before the fault event occurred, determine whether there were any changes in remote signaling within the second set time period, and record the changed remote signaling data within this time period as the relevant remote signaling of the fault event. The second set time period is similar to the first set time period and can be set according to the actual situation, as long as it can reflect the temporal correlation with the fault event. For example, the second time period can also be two minutes, that is, determine whether the remote signaling within two minutes is different from the time of the fault event. If they are different, record the remote signaling.

[0038] 4) Iterate through each fault event in the fault event list, obtain the subsystem to which each fault event belongs, and query the telemetry data within the second set time period before the fault event occurs for each subsystem. Determine whether the telemetry change within the second set time period exceeds a set threshold. Record the telemetry data whose change exceeds the set value within this time period as the relevant telemetry data for the fault event. The set threshold can be set according to the actual situation, as long as it can reflect that a significant change in telemetry data may be related to the fault event, such as 10%.

[0039] 5) Determine all fault information related to the occurrence of the set event.

[0040] This invention treats fault events in a fault event list as fault events related to a set event, and uses the remote signaling and telemetry data related to each fault event in the fault event list as the associated data of the fault events. The fault events in the event list and their corresponding associated data constitute all fault information related to the occurrence of the received set event. This comprehensive fault information ensures complete coverage of all data related to the set event, making the collected data more comprehensive and guaranteeing no omissions in data collection.

[0041] To visually display all the obtained fault information, this invention provides a visual representation of all the obtained fault information. During the visualization, all fault information is displayed in a fishbone diagram or block diagram in chronological order of the occurrence of the fault events, showing the changes in the relevant remote signaling and telemetry information of the subsystem to which the event occurred at that time.

[0042] The first and second time periods can be adjusted as needed. Users can obtain a series of fault-related information based on the default two-minute filter interval. If it is not very helpful for analyzing the problem, the interval can be expanded to obtain more subsystem-related change data. The information collected by the system usually has a clear relationship with the time of the fault.

[0043] As can be seen, the present invention can automatically search for fault events based on temporal correlation, and can directly associate fault events with their respective subsystems. It can automatically search for related data based on the changes in remote signaling and telemetry of the respective subsystems as the judgment criteria for the search process. The entire process can be implemented automatically without the need for manual layer-by-layer judgment or manual evaluation, which simplifies the search process, improves search efficiency, and ensures the integrity of the searched data.

[0044] In summary, this invention can automatically execute queries and record data after a set fault occurs, searching for all information related to the fault. Users no longer need to rely on experience to distinguish and view multiple subsystems. Furthermore, this invention uses events, remote signaling changes, and telemetry change rates as the criteria for the search process, ensuring data integrity. Although additional information conforming to change patterns may be added, potentially disrupting user analysis, the data is more comprehensive, ensuring no data is missed during collection. In addition, this invention can arrange and display the searched fault events in chronological order, with each event displaying relevant remote signaling and telemetry data, allowing users to view all information related to the fault on a single page.

[0045] Implementation of the method for collecting fault information in digital converter stations

[0046] When this invention receives a set event from a digital converter station, it first queries whether any fault events have occurred within a first set time period prior to the set event, and saves all the queried fault events to an event list. Then, it iterates through the fault events in the event list, querying the telemetry and teleindication data within a second set time period prior to the fault event based on the subsystem to which the fault event belongs. Finally, it uses the telemetry and teleindication data that changed within the second set time period prior to the fault event and the telemetry data whose change rate exceeded a set threshold as the associated data for the fault event. The fault events in the event list and their corresponding associated data are then considered as all fault information related to the occurrence of the received set event. The specific implementation process of this method has been detailed in the implementation scheme of the digital converter station fault information collection system and will not be repeated here.

Claims

1. A method for collecting fault information in a digital converter station, characterized in that, The method includes the following steps: 1) When a setting event is received from the digital converter station, query whether any fault events have occurred within the first set time period before the setting event occurred, and save all the queried fault events to the event list; where a setting event refers to a fault level that reaches a certain level or a specified event that needs to be handled separately. 2) Traverse the fault events in the event list and query the telemetry and teleindication data within the second set time period before the fault event occurred, based on the subsystem to which the fault event belongs; 3) Take the telemetry data that changes within the second set time period before the fault event occurs, and the telemetry data whose change rate exceeds the set threshold as the associated data of the fault event, and take the fault events in the event list and their corresponding associated data as all fault information related to the occurrence of the received set event.

2. The method for collecting fault information of a digital converter station according to claim 1, characterized in that, In step 1), the fault event query is performed in a recursive upward manner: if a fault event has occurred within a first set time period before the fault event occurs, then the query is recursively performed upward based on the time of the fault event to determine whether a fault event has occurred within the first set time period before the fault event occurs. If it has occurred, the query continues upward for the fault events that have occurred until no more fault events occur.

3. The method for collecting fault information of a digital converter station according to claim 1, characterized in that, The fault events queried in step 1) refer to minor fault events.

4. The method for collecting fault information of a digital converter station according to claim 1, characterized in that, The method also includes visually displaying all recorded fault information.

5. The method for collecting fault information of a digital converter station according to claim 4, characterized in that, When visualizing the fault information, all recorded fault information is displayed in the form of a fishbone diagram or block diagram according to the order of events, and the displayed events also include the associated data corresponding to the events.

6. A digital converter station fault information collection system, characterized in that, The fault information collection system is used to communicate with the digital converter station. When it receives a set event from the digital converter station, it queries whether a fault event has occurred within a first set time period before the set event occurs, and saves all the queried fault events to the event list. The defined events refer to fault levels that reach a certain level or events that require separate handling; the fault events in the event list are traversed, and the remote signaling and telemetry data within the second defined time period before the occurrence of the fault event are queried according to the subsystem to which the fault event belongs; Telemetry data that change within a second set time period before the occurrence of a fault event, and telemetry data whose rate of change exceeds a set threshold, are used as associated data for the fault event. Fault events and their corresponding associated data in the event list are used as all fault information related to the occurrence of the received set event.

7. The digital converter station fault information collection system according to claim 6, characterized in that, The fault information collection system performs fault event queries in a recursive upward manner: if a fault event occurred within a first set time period before the occurrence of a set event, then the system recursively queries upward based on the time of occurrence of the fault event to determine whether any other fault events occurred within the first set time period before the occurrence of the fault event. If so, the system continues to query upward for the fault events that have occurred, until no more fault events are found.

8. The digital converter station fault information collection system according to claim 6, characterized in that, The fault information collection system also includes a display module, which is used to display all the obtained fault information in a visual manner.

9. The digital converter station fault information collection system according to claim 8, characterized in that, When the display module performs visualization, it displays all the recorded fault information in the order of events occurring in a fishbone diagram or block diagram. The displayed fault events also include the associated data corresponding to the fault events.

10. The digital converter station fault information collection system according to claim 6, characterized in that, The fault information collection system obtains events through the unified data query and subscription interface provided by the digital converter station.

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