An intelligent alarm method and system for a relay protection master station

Abstract

A smart alarm method and system for a relay protection master station, the method comprising: the relay protection master station collects operating data of relay protection equipment in a substation, actively diagnoses the relay protection equipment and receives its self-test alarm information, with the active diagnosis results and the self-test alarm information together forming the original alarm information; extracting primary alarm information from the original alarm information, and dividing various primary alarm information into different alarm groups; based on a professional knowledge base, forming an alarm group general title and alarm handling measures according to the primary alarm information in each alarm group, and pushing them to operation and maintenance personnel through the relay protection master station. The present invention can perceive and actively diagnose the operating status of the relay protection equipment, combine the self-test alarm information and active diagnosis of the relay protection equipment, achieve comprehensive coverage of the abnormal perception of the relay protection equipment, and group the abnormalities to alarm, and construct a concise and easy-to-understand group alarm description, effectively supporting the operation and maintenance of the relay protection equipment.

Description

Technical Field

[0001] The present invention belongs to the technical field of power system dispatching automation, and in particular relates to an intelligent alarm method and system for a relay protection master station in relay protection operation and maintenance of a substation. Background Art

[0002] The safe operation of relay protection equipment is crucial to maintaining the safe operation of the power grid. In recent years, various dispatching organizations have implemented relay protection master station systems to monitor these devices. Relay protection equipment has self-diagnostics capabilities, enabling it to perform self-diagnostics on its components. If the relay protection equipment detects an operational anomaly, it sends an alarm signal to the master station system, alerting dispatchers to the abnormality.

[0003] However, due to the large number of relay protection devices in substations, dispatchers are often "overwhelmed" by the numerous alarm messages when they are faced with all the relay protection devices in multiple substations. They are unable to promptly detect alarm messages from the devices. Furthermore, the self-test function of the relay protection devices can only detect anomalies in the device itself, and cannot detect whether the device's external wiring or operating parameters are correct. Relying solely on the device's self-test function for abnormal operation of the device leaves gaps in detection. Furthermore, the self-test alarm information from the relay protection devices is highly specialized and does not provide a detailed information classification. The identification and utilization of this information is extremely dependent on the knowledge of professionals, and the identification of self-test alarm information requires a high level of expertise. These issues result in the relay protection master station system providing limited support to relay protection equipment maintenance personnel in promptly understanding the operating status of each relay protection device. This creates the risk of operational risks or fault expansion in the power grid system due to failure to promptly detect relay protection anomalies.

[0004] As power systems become larger and more complex, in order to ensure the safe and stable operation of large-scale power grids, it is required to be able to promptly detect abnormalities in relay protection equipment. How to effectively utilize the self-test alarm information of relay protection, comprehensively monitor, analyze and diagnose potential problems of relay protection equipment from a system perspective, and how to quickly obtain and respond to the large amount of alarm information generated by large-scale power grids to support the status inspection and maintenance of relay protection equipment are issues that urgently need to be addressed in the current substation relay protection operation and maintenance. Summary of the Invention

[0005] In order to solve the deficiencies in the prior art, the purpose of the present invention is to provide an intelligent alarm method and system for a relay protection master station system. The method can perform intelligent comprehensive analysis of the self-test alarm of the relay protection equipment and intelligent diagnosis based on comparison of operating data from a system perspective based on the self-test alarm information of the relay protection equipment and multiple parameter information outside the device, thereby performing comprehensive intelligent diagnosis and analysis of the operating status of the relay protection equipment and issuing an alarm after an abnormality is found.

[0006] The present invention adopts the following technical solutions.

[0007] An intelligent alarm method for a relay protection master station,

[0008] The method comprises:

[0009] Step 1: The relay protection master station collects operating data of the relay protection equipment in the substation, performs active diagnosis on the relay protection equipment based on the operating data, and receives self-test alarm information from the relay protection equipment. The active diagnosis results and self-test alarm information together constitute the original alarm information;

[0010] Step 2: extract primary alarm information from the original alarm information and divide various primary alarm information into different alarm groups;

[0011] Step 3: Based on the professional knowledge base and the primary alarm information in each alarm group, a general title of the alarm group and alarm handling measures are formed and pushed to the operation and maintenance personnel through the relay protection master station.

[0012] Preferably, in step 1, the operation data includes: original operation data, operation measurement quantities, state quantities and operation setting value parameters of the relay protection equipment;

[0013] The active diagnosis includes model file verification, constant value verification, correlation data consistency verification and multiple relay protection device behavior verification.

[0014] Preferably, the self-test alarm information is alarm information obtained through online diagnosis of various components in the relay protection device, and the alarm information is sent to the relay protection main station through the protection substation.

[0015] Preferably, the step 2 comprises:

[0016] Step 2.1: Based on lexical analysis and keyword matching, various attributes of the original alarm information are extracted as primary alarm information. The attributes include the generation time of the original alarm information, the corresponding relay protection device, the alarm type, and the alarm description.

[0017] Step 2.2: Based on the relay protection equipment and alarm description in the primary alarm information and according to the grouping rules, different alarm groups are formed.

[0018] Preferably, the grouping rules include:

[0019] If the same type of alarm is generated by the same relay protection device within the preset adjacent time period, the corresponding primary alarm information will be classified into the same alarm group;

[0020] If the alarm descriptions of any two primary alarm messages are the same and the interval between their generation times is less than the preset time interval limit, the corresponding primary alarm messages will be included in the same alarm group.

[0021] Preferably, the preset adjacent time period is 3 minutes, and the preset time interval limit is no more than 2 minutes.

[0022] Preferably, the step 2 further comprises:

[0023] Step 2.3: For newly generated primary alarm information, according to the relay protection device, generation time, and alarm type contained in the primary alarm information, search the existing alarm groups one by one to determine whether the primary alarm belongs to the existing alarm group;

[0024] If the newly generated primary alarm information belongs to an existing alarm group, then update the existing alarm group, that is, add the primary alarm information to the corresponding alarm group;

[0025] If the newly generated primary alarm information does not belong to any existing alarm group, a new alarm group is created with the newly generated primary alarm information.

[0026] Preferably, the step 3 comprises:

[0027] Step 3.1: Build a professional knowledge base; the professional knowledge base includes: causes of relay protection equipment anomalies and troubleshooting measures;

[0028] Step 3.2, based on the primary alarm information type in the alarm group, obtain the alarm group title of the alarm group;

[0029] Step 3.3: Based on each primary alarm information in the alarm group, extract the corresponding fault handling measures from the professional knowledge base and process them as the alarm handling measures for the alarm group;

[0030] In step 3.4, the alarm group title and alarm handling measures are pushed to the operation and maintenance personnel through the relay protection master station.

[0031] Preferably, in step 3.3, the processing measures corresponding to each primary alarm in the alarm group are sequentially queried in the professional knowledge base, and the queried processing measures are combined and deduplicated to form an alarm processing measure corresponding to the alarm group.

[0032] An intelligent alarm system for a relay protection master station, characterized in that:

[0033] The system includes: an original alarm information processing module, a grouping processing module and an information analysis module;

[0034] Among them, the relay protection master station obtains the original alarm information of the relay protection equipment through the protection substation, processes the original alarm information through the original alarm information processing module to obtain primary alarm information, and the primary alarm information is grouped by the grouping processing module to obtain the alarm group. The information analysis module is used to build a professional knowledge base, and analyzes the primary alarm information in the alarm group in combination with the professional knowledge base to obtain the total title of the alarm group and the alarm processing recommended measures, and pushes them to the operation and maintenance personnel through the relay protection master station.

[0035] The beneficial effect of the present invention is that, compared with the prior art, the intelligent alarm method and system of the relay protection master station provided by the present invention can perceive and actively diagnose the operating status of the relay protection equipment, identify the operating parameters and external circuit abnormalities of the relay protection equipment online, and combine the alarm information of the self-inspection of the relay protection equipment to achieve comprehensive coverage of the perception of abnormalities of the relay protection equipment; on the basis of abnormality identification, the perceived abnormalities of the relay protection equipment are grouped and alarmed according to the attributes of the alarm information and the set grouping rules, and a concise and easy-to-understand group alarm description is constructed, and the general title of the alarm group and the alarm handling measures are pushed to the operation and maintenance personnel, effectively supporting the operation and maintenance work of the relay protection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the overall process of the intelligent alarm method for the relay protection master station system proposed in the present invention;

[0037] Figure 2 This is the architecture diagram of the relay protection master station system;

[0038] Figure 3 A schematic diagram of the process of generating intelligent alarms in the present invention;

[0039] Figure 4 This is a schematic diagram of the overall structure of the intelligent alarm system for the relay protection master station system proposed in the present invention. DETAILED DESCRIPTION

[0040] The present application will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present application.

[0041] like Figure 1 As shown, the present invention provides an intelligent alarm method for a relay protection master station, comprising the following steps:

[0042] Step 1: Collect active diagnostic data and self-test alarm information of relay protection equipment in the substation;

[0043] The present invention issues an alarm for abnormal status of the relay protection device. When an abnormality occurs in the relay protection device, it can be sensed through the following ways: the relay protection device senses it through self-inspection, generates an alarm and sends it to the outside; for abnormalities that are not sensed during the self-inspection of the relay protection device, active diagnosis and perception are required through a third-party device to generate an alarm. The third-party device in this embodiment is a security substation.

[0044] Specifically, the relay protection master station collects the operating data of the relay protection equipment in the substation, actively diagnoses the relay protection equipment, and receives the self-test alarm information of the relay protection equipment to determine whether the relay protection equipment has any abnormality;

[0045] Among them, reference Figure 2 As shown in the figure, the relay protection master station includes the power data network, server and workstation. The relay protection equipment in the substation is connected to the Baoxin substation, and the Baoxin substation realizes data transmission between the relay protection master station and the power data network.

[0046] The operating data of the relay protection equipment in the substation is collected through the Baoxin substation. The operating data includes the original operating data, operating measurement quantities, status quantities, operating setting value parameters and other information of the relay protection equipment. The original operating data also includes self-test information, recording files, etc. The operating data of the relay protection equipment is transmitted to the relay protection master station, so that the relay protection master station can collect the operating data of the relay protection equipment in the substation.

[0047] The relay protection master station combines the collected operating data to conduct active diagnosis of the relay protection equipment to monitor possible anomalies in the relay protection equipment's operating model, operating parameters, external circuits, and other links. Active diagnosis includes periodic model file verification, constant value verification, correlation data consistency verification, and behavior verification of multiple relay protection devices. If an abnormality is found in the relay protection equipment during the verification, an alarm will be issued.

[0048] The verification cycle length in the active diagnosis can be from one day to one week. In this embodiment, the cycle length is preferably one day, that is, the active diagnosis is performed once a day.

[0049] Specifically, the model file verification involves regularly obtaining the model ICD file of the relay protection online, and performing content verification between the obtained ICD file and the locally saved ICD file to diagnose whether the model file has changed. If the model file has changed, it indicates an abnormality.

[0050] The fixed value verification can obtain the relay protection operating fixed value online on a regular basis and compare it with the locally saved standard fixed value single file to diagnose whether the operating fixed value has changed. When the operating fixed value changes, it indicates an abnormality. The regular acquisition of data for the fixed value verification can be set to once a day.

[0051] The consistency check of correlation data verifies the relay protection sampling circuit through data calculation and comparison. This includes using the sum of the steady-state three-phase voltage and current and the sum of the zero-sequence voltage and current to verify, and performing data comparison on the three-phase differential current to diagnose whether there is any abnormality in the sampling circuit.

[0052] The behavior verification of multiple relay protection devices uses the principle that the behavior of each relay protection device in response to changes in electrical quantities during power grid disturbances should be the same. For example, during power grid disturbances, relay protection devices in the same interval should start at the same time and the switch position measurement values ​​should be equal. It diagnoses whether there are any abnormalities in the sampling circuit and the switch quantity circuit.

[0053] The self-test alarm information of the relay protection equipment is the online diagnosis of each component in the relay protection equipment. After the abnormality is diagnosed, the self-test alarm generated will be sent to the relay protection main station through the protection substation. The self-test alarm information of the relay protection equipment realizes the diagnosis of the relay protection equipment itself.

[0054] The alarm results obtained by the active diagnosis of the relay protection equipment and the self-test alarm information of the relay protection equipment are transmitted to the relay protection master station through the protection substation. The relay protection master station combines the active diagnosis results and self-test alarm information of the relay protection equipment to form the original alarm information, thereby achieving comprehensive coverage of abnormal condition monitoring of the relay protection equipment.

[0055] Step 2: extract primary alarm information from the original alarm information and divide various primary alarm information into different alarm groups;

[0056] In order to address the problem that the relay protection master station system cannot process the alarm information in time due to the large number of connected relay protection devices, and the problem that the equipment alarm information cannot be discovered in time, the present invention further processes the original alarm information instead of directly pushing the alarm.

[0057] Specifically, step 2 further includes the following steps:

[0058] Step 2.1: Based on lexical analysis and keyword matching, extract various attributes of the original alarm information and write them into the attributes of the primary alarm information. The attributes include the generation time of the original alarm information, the corresponding relay protection device, the alarm type, and the alarm description.

[0059] Extracting various attributes of the original alarm information as primary alarm information also includes:

[0060] Write the generation time of the original alarm information into the time attribute of the primary alarm information;

[0061] The relay protection device corresponding to the original alarm information is written into the relay protection device attribute of the primary alarm information;

[0062] The original alarm is classified according to the cause of the original alarm information, and the type of the primary alarm information is filled in according to the type corresponding to the original alarm information; the classification process also includes: first, determining whether the original alarm information comes from the self-test alarm of the relay protection equipment or the active diagnosis. The original alarm information from the self-test alarm of the relay protection equipment can be manually divided into different types such as CPU board abnormality, communication board abnormality, input board abnormality, and output board abnormality according to the semantics of the description. The original alarm information from active diagnosis can be subdivided into different types such as operation model abnormality, operation parameter abnormality, and external circuit abnormality.

[0063] Fill in the description of the primary alarm information according to the description of the original alarm information.

[0064] Finally, the above contents are combined to obtain the primary alarm information corresponding to the original alarm information. Each original alarm information received by the relay protection master station forms a corresponding primary alarm information.

[0065] Step 2.2: Based on the relay protection equipment and alarm description in the primary alarm information, different alarm groups are formed according to the grouping rules;

[0066] The grouping rules include: if the same relay protection device generates the same type of alarm within a preset adjacent time period, the corresponding primary alarm information will be classified into the same alarm group; in this embodiment, the preset adjacent time period is preferably set to 3 minutes.

[0067] If the alarm descriptions of any two primary alarm messages are the same and the interval between their generation times is less than the preset time interval limit, the corresponding primary alarm messages will be included in the same alarm group; in this embodiment, the preset time interval limit is no more than 2 minutes.

[0068] During the grouping process, primary alarm information with the same alarm description and a generation time interval less than the preset time interval limit is preferentially grouped into the same alarm group.

[0069] Step 2.3: For newly generated primary alarm information, according to the relay protection device, generation time, and alarm type contained in the primary alarm information, search the existing alarm groups one by one to determine whether the primary alarm belongs to the existing alarm group;

[0070] Reference Figure 3As shown in FIG, if the newly generated primary alarm information belongs to an existing alarm group, the existing alarm group is updated, that is, the primary alarm information is added to the corresponding alarm group;

[0071] If the newly generated primary alarm information does not belong to any existing alarm group, a new alarm group is created with the newly generated primary alarm information.

[0072] Set a time period. During this time period, newly generated primary alarms of the same type are grouped together according to the grouping rules. These alarms are no longer pushed repeatedly, significantly reducing the number of invalid alarms. In this embodiment, the time period is set based on the time of the last primary alarm added to the alarm group. The difference between the time of newly generated primary alarms of the same type and this time period should be less than 2 minutes.

[0073] Step 3: Based on the professional knowledge base and the primary alarm information in each alarm group, a general title of the alarm group and alarm handling measures are formed and pushed to the operation and maintenance personnel through the relay protection master station.

[0074] Specifically, step 3 includes:

[0075] Step 3.1: Build a professional knowledge base; the professional knowledge base includes: causes of relay protection equipment anomalies and troubleshooting measures;

[0076] Among them, the professional knowledge base refers to the abnormal causes and treatment measures corresponding to the equipment self-test alarm information provided by each relay protection equipment manufacturer. The abnormal causes and treatment measures information of various types of relay protection equipment are sorted out in advance to obtain the professional knowledge base.

[0077] Step 3.2, based on the primary alarm information type in the alarm group, obtain the alarm group title of the alarm group;

[0078] The alarm title is derived by extracting the description and attributes of each primary alarm message in the alarm group. Specifically, the alarm group title consists of the time of the first primary alarm message in the alarm group, the name of the relay protection device, and the alarm type. An example of an alarm group title might be: "2021-09-15 16:24:18 xx line xx protection operating parameter abnormal."

[0079] Step 3.3: Based on each primary alarm information in the alarm group, extract the corresponding fault handling measures from the professional knowledge base and process them as the alarm handling measures for the alarm group;

[0080] Specifically, the professional knowledge base includes the processing measures corresponding to each primary alarm information. Each primary alarm information corresponds to a processing measure. When extracting fault handling measures, the processing measures corresponding to each primary alarm in the alarm group are queried in turn based on the alarm group. The queried processing measures are combined and deduplicated to form an alarm processing measure corresponding to the alarm group.

[0081] In step 3.4, the alarm group title and alarm handling measures are pushed to the operation and maintenance personnel through the relay protection master station. This allows the relay protection equipment operation and maintenance personnel to quickly understand what abnormality has occurred in the relay protection equipment and how to handle it, thus achieving intelligent alarm.

[0082] Reference Figure 4 The present invention further provides an intelligent alarm system for a relay protection master station. The intelligent alarm method for the relay protection master station can be implemented based on the system. The system includes:

[0083] Original alarm information processing module, grouping processing module and information analysis module;

[0084] Among them, the relay protection master station obtains the original alarm information of the relay protection equipment through the protection substation, processes the original alarm information through the original alarm information processing module to obtain primary alarm information, and the primary alarm information is grouped by the grouping processing module to obtain the alarm group. The information analysis module is used to build a professional knowledge base, and analyzes the primary alarm information in the alarm group in combination with the professional knowledge base to obtain the total title of the alarm group and the alarm processing measures, and pushes them to the operation and maintenance personnel through the relay protection master station.

[0085] The relay protection master station also includes a power data network, a server and a workstation. The power data network is used to realize data transmission between the relay protection master station and the protection substation. The original alarm information processing module, the group processing module and the information analysis module can be deployed on the server. The server is connected to the workstation and can transmit information to the workstation. The operation and maintenance personnel can view the general title of the pushed alarm group and the alarm processing measures through the workstation, and promptly discover the faults of the relay protection equipment and handle them according to the pushed content.

[0086] The beneficial effect of the present invention is that, compared with the prior art, the present invention is based on the self-test alarm information, operating quantity measurement, state quantity, operating setting value parameters and other information of the relay protection equipment, and performs intelligent comprehensive analysis of the self-test alarm of the relay protection equipment and intelligent diagnosis based on the comparison of operating data from a system perspective, thereby performing comprehensive intelligent diagnosis and analysis of the operating status of the relay protection equipment, and issuing an alarm after an abnormality is found. At the same time, it can provide the operation and maintenance personnel with the cause of the alarm and suggestions for fault handling measures, so that the operation and maintenance personnel can deal with abnormal conditions in a timely and effective manner.

[0087] The applicant of the present invention has made a detailed explanation and description of the implementation examples of the present invention in conjunction with the drawings in the specification. However, those skilled in the art should understand that the above implementation examples are only preferred implementation plans of the present invention, and the detailed description is only to help readers better understand the spirit of the present invention, and is not a limitation on the scope of protection of the present invention. On the contrary, any improvements or modifications based on the inventive spirit of the present invention should fall within the scope of protection of the present invention.

Claims

1. An intelligent alarm method for a relay protection master station, characterized in that: The method comprises: Step 1: The relay protection master station collects operating data of the relay protection equipment in the substation, performs active diagnosis on the relay protection equipment based on the operating data, and receives self-test alarm information from the relay protection equipment. The active diagnosis results and self-test alarm information together constitute the original alarm information; Step 2: extract primary alarm information from the original alarm information and divide various primary alarm information into different alarm groups; The step 2 includes: Step 2.1: Based on lexical analysis and keyword matching, various attributes of the original alarm information are extracted as primary alarm information. The attributes include the generation time of the original alarm information, the corresponding relay protection device, the alarm type, and the alarm description. Step 2.2: Based on the relay protection equipment and alarm description in the primary alarm information, different alarm groups are formed according to the grouping rules; The grouping rules include: if the same type of alarm is generated by the same relay protection device within a preset adjacent time period, the corresponding primary alarm information will be classified into the same alarm group; Step 3: Based on the professional knowledge base and the primary alarm information in each alarm group, a general title of the alarm group and alarm handling measures are formed and pushed to the operation and maintenance personnel through the relay protection master station.

2. The intelligent alarm method of a relay protection master station according to claim 1, characterized in that: In step 1, the operation data includes: original operation data, operation measurement quantity, state quantity and operation setting value parameters of the relay protection device; The active diagnosis includes model file verification, constant value verification, correlation data consistency verification and multiple relay protection device behavior verification.

3. The intelligent alarm method of the relay protection master station according to claim 1, characterized in that: The self-test alarm information is alarm information obtained by online diagnosis of each component in the relay protection device, and the alarm information is sent to the relay protection main station through the protection substation.

4. The intelligent alarm method of the relay protection master station according to claim 1, characterized in that: The grouping rules include: If the same type of alarm is generated by the same relay protection device within the preset adjacent time period, the corresponding primary alarm information will be classified into the same alarm group; If the alarm descriptions of any two primary alarm messages are the same and the interval between their generation times is less than the preset time interval limit, the corresponding primary alarm messages will be included in the same alarm group.

5. The intelligent alarm method of the relay protection master station according to claim 4, characterized in that: The preset adjacent time period is 3 minutes, and the preset time interval limit is no more than 2 minutes.

6. The intelligent alarm method of the relay protection master station according to claim 1, characterized in that: The step 2 further comprises: Step 2.3: For newly generated primary alarm information, according to the relay protection device, generation time, and alarm type contained in the primary alarm information, search the existing alarm groups one by one to determine whether the primary alarm belongs to the existing alarm group; If the newly generated primary alarm information belongs to an existing alarm group, then update the existing alarm group, that is, add the primary alarm information to the corresponding alarm group; If the newly generated primary alarm information does not belong to any existing alarm group, a new alarm group is created with the newly generated primary alarm information.

7. The intelligent alarm method of the relay protection master station according to claim 1, characterized in that: The step 3 includes: Step 3.1: Build a professional knowledge base; the professional knowledge base includes: causes of relay protection equipment anomalies and troubleshooting measures; Step 3.2, based on the primary alarm information type in the alarm group, obtain the alarm group title of the alarm group; Step 3.3: Based on each primary alarm information in the alarm group, extract the corresponding fault handling measures from the professional knowledge base and process them as the alarm handling measures for the alarm group; In step 3.4, the alarm group title and alarm handling measures are pushed to the operation and maintenance personnel through the relay protection master station.

8. The intelligent alarm method for the relay protection master station according to claim 7, characterized in that: In step 3.3, the corresponding processing measures of each primary alarm in the alarm group are sequentially queried in the professional knowledge base, and the queried processing measures are combined and deduplicated to form an alarm processing measure corresponding to the alarm group.

9. An intelligent alarm system for a relay protection master station implemented by using the intelligent alarm method for a relay protection master station according to any one of claims 1 to 8, characterized in that: The system includes: an original alarm information processing module, a grouping processing module and an information analysis module; Among them, the relay protection master station obtains the original alarm information of the relay protection equipment through the protection substation, processes the original alarm information through the original alarm information processing module to obtain primary alarm information, and the primary alarm information is grouped by the grouping processing module to obtain the alarm group. The information analysis module is used to build a professional knowledge base, and analyzes the primary alarm information in the alarm group in combination with the professional knowledge base to obtain the total title of the alarm group and the alarm processing measures, and pushes them to the operation and maintenance personnel through the relay protection master station.

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