A monitoring system and method for intelligent substation relay protection equipment

Abstract

The present application relates to the technical field of relay protection, and particularly relates to a monitoring system and method for relay protection equipment of an intelligent substation, comprising a central processing platform and an edge processing platform, through the establishment of a logic relationship library and the collection of electrical quantity changes through sensors, timely and efficient relay protection can be performed at the near relay protection equipment end, and the fault recording data of the remote relay protection equipment end is compared and processed, thereby realizing fault diagnosis of the relay protection equipment, the self-checking effect is good, and the abnormal electrical quantity collection sensor can be positioned, thereby providing convenience for the positioning of the fault point of the substation; through the marking of the directional trend change and the sorting of the traceable electrical quantity change data, the central processing platform of the remote relay protection equipment end is used to analyze the fault recording data, the purpose of early warning before the occurrence of the fault of the substation is achieved, and reliable protection is provided for the persistent and effective operation of the substation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of relay protection, in particular to a monitoring system and method for relay protection equipment of a smart substation. BACKGROUND

[0002] A smart substation is a substation that adopts advanced, reliable, integrated and environmentally friendly intelligent equipment, and automatically completes basic functions such as information acquisition, measurement, control, protection, metering and detection, with the basic requirements of full-station information digitization, communication platform networking and information sharing standardization, while having advanced functions such as supporting real-time automatic control of the power grid, intelligent adjustment, online analysis and decision-making, and cooperation and interaction.

[0003] Relay protection is an important measure for detecting faults or abnormal conditions in a power system, and issuing an alarm signal or directly isolating and removing the fault part. Conventional relay protection detection uses manual inspection, which is low in efficiency and cannot effectively detect abnormal conditions of power generation equipment in a timely manner. For example, a relay protection and control logic fault positioning method and device, after the protection event occurs, retrieves the substation configuration data associated with the protection event in the pre-set logic relationship library, fills the substation configuration data into the logic analysis table, and when the configuration data in the logic analysis table is missing, the missing configuration data can be quickly found out according to the associated relationship, thereby realizing automatic fault identification of protection and control logic and effectively improving positioning accuracy and efficiency.

[0004] Based on the above-mentioned search, it can be seen that the existing monitoring of substation relay protection equipment has the defect of being unable to self-check. In the case of relay protection equipment failure, it cannot timely and effectively judge the fault and lacks prediction of the fault.

[0005] In view of the above-mentioned problems in the prior art, the present application is proposed. SUMMARY

[0006] In view of the above-mentioned problems in the prior art, the present application is proposed.

[0007] Therefore, the technical problem to be solved by the present application is to realize efficient relay protection by establishing a logic relationship library and collecting electrical quantity changes through sensors, and to diagnose faults of relay protection equipment by comparing remote fault recording data.

[0008] To solve the above technical problems, the application provides the following technical scheme, a monitoring system for a relay protection device of a smart substation, comprising: a central processing platform and an edge processing platform.

[0009] As a preferred scheme of the monitoring system for the relay protection device of the smart substation, the central processing platform comprises a data analysis unit and an abnormal source positioning unit.

[0010] The edge processing platform comprises a logical reference unit and a fault analysis unit.

[0011] As a preferred scheme of the monitoring system for the relay protection device of the smart substation, the logical reference unit comprises a logical relationship library, a data comparison module and a logical response module.

[0012] The fault analysis unit comprises a logical data collection module, a data filling module and an identification adding module.

[0013] The data analysis unit comprises a fault recording data storage module, a reference comparison module and an abnormal positioning module.

[0014] The abnormal source positioning unit comprises a logical verification module, an abnormal source tracing module, a feature recording module and a pre-warning analysis module.

[0015] As a preferred scheme of the monitoring system for the relay protection device of the smart substation, the logical relationship library establishes a safe operation logical library corresponding to a fault type according to a mapping relationship between an electrical quantity and a relay protection logic.

[0016] The data comparison module compares the electrical quantity collected by the on-site sensor of the substation with the electrical quantity stored in the safe operation logical library.

[0017] The logical response module performs a relay protection action when the relay protection comparison result conforms to the fault type in the relay protection logic.

[0018] As a preferred scheme of the monitoring system for the relay protection device of the smart substation, the data collection module collects relevant electrical quantities according to a trigger logic corresponding to the relay protection action, and generates an electrical quantity reference table.

[0019] The data filling module fills the collected relevant electrical quantities into the electrical quantity reference table.

[0020] The identification adding module directionally marks the change trend of the relevant electrical quantities in the electrical quantity reference table, and obtains a final reference table.

[0021] As a kind of preferred scheme of the monitoring system for the relay protection equipment of intelligent substation described in the application, wherein: the fault recording data storage module records the fault recording data of substation;

[0022] The reference comparison module retrieves the electrical quantity data of corresponding time in fault recording data as reference data according to the collection time of relevant electrical quantity in reference table, and carries out reference comparison of electrical quantity;

[0023] The abnormal positioning module positions abnormal electrical quantity data as abnormal data according to reference comparison result, and carries out suspicious abnormal positioning according to the coordinates of abnormal data acquisition sensor.

[0024] As a kind of preferred scheme of the monitoring system for the relay protection equipment of intelligent substation described in the application, wherein: the logic verification module carries out similarity comparison of reference data according to safe operation logic library, judges the fault type of comparison result and logic response module;

[0025] When the fault type is consistent, it is judged that the fault response is correct;When the fault type is inconsistent, it is judged that the fault response is incorrect;

[0026] The abnormal traceability module obtains the electrical quantity data that meets the directional marking trend within the set time before the collection time of relevant electrical quantity in reference table as traceability electrical quantity change data after judging that the fault response is correct;

[0027] The feature recording module records the change trend of traceability electrical quantity change data as the early warning feature of fault type judged by logic response module;

[0028] The early warning analysis module issues early warning of corresponding fault type when the change trend of electrical quantity data meets early warning feature within one-half set time.

[0029] Another object of the application is to provide a monitoring method for the relay protection equipment of intelligent substation, which can effectively issue early warning before the failure of relay protection equipment, discover potential fault risk in time through comparison processing of logic relationship library and fault data, and issue warning signal according to the change trend of electrical quantity data, so as to ensure the stable operation of substation and avoid large-scale power failure or other accidents caused by equipment failure.

[0030] To solve the above technical problems, the present application provides the following technical solutions: a monitoring method for a relay protection device of an intelligent substation, comprising: establishing a safe operation logic library corresponding to a fault type according to a mapping relationship between electrical quantities and relay protection logic, storing in a logic relationship library, an electrical quantity collected by a substation field sensor is acquired by a data comparison module, and the electrical quantity collected by the substation field sensor is compared with the electrical quantity stored in the safe operation logic library, when the result of the relay protection comparison is consistent with the fault type in the relay protection logic, a logic response module performs a relay protection action corresponding to the fault type;

[0031] According to the trigger logic corresponding to the relay protection action, the related electrical quantities are collected, an electrical quantity reference table is generated by a logic data collection module, the collected related electrical quantities are filled into the electrical quantity reference table by a data filling module, and the change trend of the related electrical quantities in the electrical quantity reference table is directionally marked by a marking module, and the final reference table is obtained.

[0032] The change trend of the electrical quantity is represented by a slope:

[0033]

[0034] Wherein S represents the slope of the t1 to t2 time period, V t1 represents the electrical quantity value measured at t1, V t2 represents the electrical quantity value measured at t2, wherein the directional mark is consistent with the change direction of the slope;

[0035] A fault recording data storage module records the fault recording data of the substation, the data comparison module retrieves the electrical quantity data of the corresponding time in the fault recording data as reference data according to the collection time of the related electrical quantities in the reference table, and performs reference comparison of the electrical quantities, according to the reference comparison result, the abnormal positioning module positions the obviously abnormal electrical quantity data as abnormal data, and according to the abnormal data acquisition sensor coordinates, the suspicious abnormality is positioned;

[0036] Wherein the judgment of the abnormal data is represented as:

[0037]

[0038] Wherein ED represents the similarity, V ref，i represents the electrical quantity value in the reference table, V fault，i represents the electrical quantity value of the corresponding time in the fault recording data, and a preset similarity alarm threshold G, when ED < G, the corresponding electrical quantity value is judged as abnormal electrical quantity data, i.e. abnormal data;

[0039] The logic verification module compares the reference data with the similarity, judges the fault type compared with the logic response module, if consistent, the fault response is correct, if inconsistent, the fault response is incorrect, after judging the fault response is correct, the abnormality tracing module obtains the electrical quantity data in the set time before the collection time of the related electrical quantity in the reference table, as the tracing electrical quantity change data, the feature recording module records the change trend of the tracing electrical quantity change data as the early warning feature of the fault type judged by the logic response module, when the change trend of the electrical quantity data is consistent with the early warning feature in the set time, the early warning analysis module sends the early warning of the corresponding fault type.

[0040] A computer device comprises a memory and a processor, the memory stores a computer program, characterized in that the processor implements the steps of the monitoring system for the intelligent substation relay protection device when executing the computer program.

[0041] A computer readable storage medium stores a computer program, characterized in that the computer program is executed by the processor to implement the steps of the monitoring system for the intelligent substation relay protection device.

[0042] The present application has the advantages that: the present application can realize timely and efficient relay protection at the near relay protection device end by establishing a logic relationship library and collecting electrical quantity changes through sensors, and realizes fault diagnosis of the relay protection device by cooperating with the fault recording data comparison and processing of the remote relay protection device end, has good self-checking effect, and can also locate abnormal electrical quantity acquisition sensors, and provides convenience for locating fault points of the substation; the marking of the directional trend change and the arrangement of the tracing electrical quantity change data are used to analyze the fault recording data by the central processing platform of the remote relay protection device end, so that early warning can be realized before the fault of the substation occurs, and reliable protection is provided for the persistent and effective operation of the substation. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows, obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0044] Figure 1 A principle block diagram of a monitoring system for an intelligent substation relay protection device is provided for an embodiment of the present application.

[0045] Figure 2A principle block diagram of a logic reference unit of a monitoring system for a relay protection device of a smart substation is provided for an embodiment of the present application.

[0046] Figure 3 A principle block diagram of a fault analysis unit of a monitoring system for a relay protection device of a smart substation is provided for an embodiment of the present application.

[0047] Figure 4 A principle block diagram of a data analysis unit of a monitoring system for a relay protection device of a smart substation is provided for an embodiment of the present application.

[0048] Figure 5 A principle block diagram of an abnormal source positioning unit of a monitoring system for a relay protection device of a smart substation is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0049] In order to make the above objectives, features and advantages of the present application more obvious and comprehensible, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work should belong to the protection scope of the present application.

[0050] Embodiment 1, reference Figures 1-5 For an embodiment of the present application, the embodiment provides a monitoring system for a relay protection device of a smart substation, comprising:

[0051] S1: a central processing platform and an edge processing platform.

[0052] It should be noted that the central processing platform communicates with the edge processing platform through Ethernet, and the central processing platform comprises a data analysis unit and an abnormal source positioning unit, and the data analysis unit and the abnormal source positioning unit are connected.

[0053] The edge processing platform comprises a logic reference unit and a fault analysis unit, and the logic reference unit and the fault analysis unit are connected.

[0054] The fault analysis unit is connected with the data analysis unit.

[0055] Further, the logic reference unit comprises a logic relationship database, a data comparison module and a logic response module, and the logic relationship database is connected with the data comparison module, and the data comparison module is connected with the logic response module.

[0056] The fault analysis unit comprises a logic data collection module, a data filling module and an identification adding module, and the logic data collection module is connected with the data filling module, and the data filling module is connected with the identification adding module.

[0057] The data analysis unit comprises a fault recording data storage module, a reference comparison module and an abnormality positioning module, and the fault recording data storage module is connected with the reference comparison module, and the reference comparison module is connected with the abnormality positioning module;

[0058] The abnormality source positioning unit comprises a logic verification module, an abnormality tracing module, a feature recording module and a warning analysis module, and the logic verification module is connected with the abnormality tracing module, the abnormality tracing module is connected with the feature recording module, and the feature recording module is connected with the warning analysis module.

[0059] Further, a logic relationship library is established according to the mapping relationship between electrical quantities and relay protection logic, and a safe operation logic library corresponding to different fault types is established;

[0060] The data comparison module compares the electrical quantities collected by the on-site sensors of the substation with the electrical quantities stored in the safe operation logic library according to relay protection;

[0061] The logic response module performs a relay protection action when the relay protection comparison result is consistent with the fault type in the relay protection logic;

[0062] The data collection module collects relevant electrical quantities according to the trigger logic corresponding to the relay protection action, and generates an electrical quantity reference table;

[0063] The data filling module fills the collected relevant electrical quantities into the electrical quantity reference table;

[0064] The identification adding module directionally marks the change trend of the relevant electrical quantities in the electrical quantity reference table, and obtains a final reference table;

[0065] The fault recording data storage module records the fault recording data of the substation;

[0066] The reference comparison module retrieves the electrical quantity data of the corresponding time in the fault recording data as reference data according to the collection time of the relevant electrical quantities in the reference table, and performs reference comparison of the electrical quantities;

[0067] The abnormality positioning module positions abnormal electrical quantity data as abnormal data according to the reference comparison result, and performs suspicious abnormality positioning according to the coordinates of the sensor collecting the abnormal data;

[0068] The logic verification module performs similarity comparison of the reference data according to the safe operation logic library, and judges the comparison result and the fault type judged by the logic response module;

[0069] When the fault types are consistent, it is judged that the fault response is correct; when the fault types are inconsistent, it is judged that the fault response is incorrect;

[0070] An abnormality tracing module obtains electrical quantity data that conforms to the directional marking trend in a set time before the collection time of the relevant electrical quantity in the reference table as the tracing electrical quantity change data after judging that the fault response is correct.

[0071] A feature recording module records the change trend of the tracing electrical quantity change data as the early warning feature of the fault type judged by the logic response module.

[0072] An early warning analysis module issues an early warning of the corresponding fault type when the change trend of the electrical quantity data conforms to the early warning feature within a set time of one-half.

[0073] The above is a schematic scheme of the monitoring system for the intelligent substation relay protection device. It should be noted that the technical scheme of the system for monitoring the intelligent substation relay protection device belongs to the same concept as the above technical scheme of the monitoring system for the intelligent substation relay protection device. The details not described in the technical scheme of the monitoring method for the intelligent substation relay protection device in this embodiment can be seen from the description of the above technical scheme of the monitoring system for the intelligent substation relay protection device.

[0074] The monitoring method for the intelligent substation relay protection device in this embodiment is characterized by: establishing a safe operation logic library corresponding to the fault type according to the mapping relationship between the electrical quantity and the relay protection logic, storing in the logic relationship library, the data comparison module obtaining the electrical quantity collected by the substation field sensor, and comparing the electrical quantity collected by the substation field sensor with the electrical quantity stored in the safe operation logic library for relay protection, when the relay protection comparison result conforms to the fault type in the relay protection logic, the logic response module performs the relay protection action corresponding to the fault type;

[0075] According to the trigger logic corresponding to the relay protection action, the relevant electrical quantity is collected, the electrical quantity reference table is generated through the logic data collection module, the data filling module fills the collected relevant electrical quantity into the electrical quantity reference table, the change trend of the relevant electrical quantity in the electrical quantity reference table is directionally marked by the identification adding module, and the final reference table is obtained.

[0076] The change trend of the electrical quantity is represented by the slope:

[0077]

[0078] Wherein S represents the slope of the t1 to t2 time period, V t1 represents the electrical quantity value measured at t1, V t2 represents the electrical quantity value measured at t2, wherein the directional marking is consistent with the change direction of the slope.

[0079] The fault recording data storage module records the fault recording data of the substation, the data comparison module retrieves the electrical quantity data of the corresponding time in the fault recording data as reference data according to the collection time of the related electrical quantity in the reference table, and performs reference comparison of the electrical quantity, according to the reference comparison result, the abnormality positioning module positions the obviously abnormal electrical quantity data as abnormal data, and according to the abnormal data collection sensor coordinates, the suspicious abnormality positioning is performed;

[0080] The judgment of the abnormal data is represented as:

[0081]

[0082] Wherein, ED represents the similarity, V ref，i represents the electrical quantity value in the reference table, V fault，i represents the electrical quantity value of the corresponding time in the fault recording data, the preset similarity alarm threshold G, when ED < G, the corresponding electrical quantity value is judged as the obviously abnormal electrical quantity data, that is, the abnormal data;

[0083] The logic verification module performs similarity comparison on the reference data, judges the comparison result and the fault type judged by the logic response module, if consistent, the fault response is correct, if inconsistent, the fault response is incorrect, after judging that the fault response is correct, the abnormality tracing module obtains the electrical quantity data that meets the directional marking trend within the set time before the collection time of the related electrical quantity in the reference table as the tracing electrical quantity change data, the feature recording module records the change trend of the tracing electrical quantity change data as the early warning feature of the fault type judged by the logic response module, when the change trend of the electrical quantity data meets the early warning feature within half of the set time, the early warning analysis module issues an early warning of the corresponding fault type.

[0084] The embodiment also provides a computing device suitable for the case of the monitoring system for the intelligent substation relay protection device, comprising:

[0085] The memory and the processor; the memory is used for storing computer executable instructions, and the processor is used for executing the computer executable instructions, realizing the monitoring system for the intelligent substation relay protection device as proposed in the above embodiment.

[0086] The embodiment also provides a storage medium, which stores a computer program, and the program is executed by the processor to realize the monitoring system for the intelligent substation relay protection device as proposed in the above embodiment.

[0087] The storage medium proposed in this embodiment belongs to the same inventive concept as the monitoring system for relay protection equipment in intelligent substations proposed in the above embodiments. Technical details not described in detail in this embodiment can be found in the above embodiments, and this embodiment has the same beneficial effects as the above embodiments.

[0088] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0089] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device).

[0090] "Computer-readable medium" can be any means that can contain, store, communicate, propagate or transmit programs for use by or in conjunction with an instruction execution system, apparatus or device.

[0091] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0092] Example 2, Reference Figures 1-5This is one embodiment of the present invention, which provides a monitoring system for relay protection equipment in intelligent substations.

[0093] In the picture:

[0094] Figure 1 : 1 represents the central processing platform; 2 represents the edge processing platform; 3 represents the logical reference unit; 4 represents the fault analysis unit; 5 represents the data analysis unit; 6 represents the anomaly source location unit.

[0095] Figure 2 :3 represents the logical reference unit; 301 represents the logical relation library; 302 represents the data comparison module; 303 represents the logical response module.

[0096] Figure 3 :4 represents the fault analysis unit; 401 represents the logic data acquisition module; 402 represents the data filling module; 403 represents the identifier addition module;

[0097] Figure 4 : 5 represents the data analysis unit; 501 represents the fault recording data storage module; 502 represents the reference comparison module; 503 represents the anomaly location module;

[0098] Figure 5 : 6 represents the anomaly source location unit; 601 represents the logic verification module; 602 represents the anomaly tracing module; 603 represents the feature recording module; 604 represents the early warning analysis module.

[0099] A monitoring system for relay protection equipment in intelligent substations, comprising: Figure 1 The 2 is composed of 3 and 4, and the 1 is composed of 5 and 6. The 1 communicates with the 2 via Ethernet. The 2 is set at the near relay protection device end, and there can be several of them, while the 1 is set at the far relay protection device end.

[0100] Figure 2 The number 3 includes 301, 302, and 303. Figure 2 The 301 module is used to establish a safe operation logic library corresponding to different fault types based on the mapping relationship between electrical quantities and relay protection logic.

[0101] Figure 2 The 301 and 302 are docked. Figure 2 The 302 is used to compare the electrical quantities collected by the field sensors in the substation with the electrical quantities stored in the safe operation logic library for relay protection.

[0102] Figure 2 The 302 and 303 are docked. Figure 2 The 303 is used to perform the corresponding relay protection action when the relay protection comparison result matches a certain fault type in the relay protection logic.

[0103] Figure 2 The middle 3 interfaces with Figure 3 The middle 4 interfaces with, Figure 3 The middle 4 includes 401 and 402, 401 is used for collecting relevant electrical quantities according to the trigger logic corresponding to the relay protection action, and generating an electrical quantity reference table;

[0104] Figure 3 The middle 401 interfaces with 402, Figure 3 The middle 402 is used for filling the collected relevant electrical quantities into the electrical quantity reference table.

[0105] Figure 3 The middle 4 interfaces with Figure 4 The middle 5 interfaces with, Figure 4 The middle 5 includes 501, 502 and 503, 501 is used for recording fault recording data of the substation;

[0106] Figure 4 The middle 501 interfaces with 502, Figure 4 The middle 502 is used for retrieving electrical quantity data of corresponding time in the fault recording data as reference data according to the collection time of the relevant electrical quantities in the reference table, and performing reference comparison of the electrical quantities;

[0107] Figure 2 The middle 302 interfaces with Figure 4 The middle 503 interfaces with, Figure 4 The middle 503 is used for positioning the obviously abnormal electrical quantity data as abnormal data according to the reference comparison result, and positioning the suspicious abnormality according to the coordinates of the sensor where the abnormal data is collected.

[0108] Figure 4 The middle 5 interfaces with Figure 5 The middle 6 interfaces with, Figure 2 The middle 3 interfaces with Figure 5 The middle 6 interfaces with, Figure 5 The middle 6 is used for performing similarity comparison of the reference data according to the safe operation logic library, judging whether the comparison result is consistent with the fault type judged by the middle 303, if consistent, judging that the fault response is correct; if inconsistent, judging that the fault response is incorrect. Figure 2 The middle 303 judges whether the fault type is consistent, if consistent, judging that the fault response is correct; if inconsistent, judging that the fault response is incorrect.

[0109] The detection of whether the relay protection equipment is running normally is realized.

[0110] A monitoring system for intelligent substation relay protection equipment also includes Figure 3 The middle 403 interfaces with 402, Figure 3 The middle 403 is used for marking the change trend of the relevant electrical quantities in the electrical quantity reference table for direction, and obtaining the final reference table.

[0111] And, Figure 5The middle 601 interfaces with the 602, and the 602 is used to obtain the electrical quantity data conforming to the directional marking trend in the set time before the collection time of the related electrical quantity in the reference table as the traceable electrical quantity change data after judging that the fault response is correct;

[0112] Figure 5 The middle 602 interfaces with the 603, and the 603 is used to record the change trend of the traceable electrical quantity change data as Figure 2 The early warning feature of the fault type judged by the middle 303;

[0113] Figure 5 The middle 603 interfaces with the 604, and the 604 is used to issue an early warning of the corresponding fault type when the change trend of the electrical quantity data conforms to the early warning feature within one-half of the set time.

[0114] The early warning of the corresponding fault type is realized.

[0115] Figure 2 The middle 301 establishes a safe operation logic library corresponding to different fault types according to the mapping relationship between the electrical quantity and the relay protection logic, Figure 2 The middle 302 compares the electrical quantity collected by the on-site sensor of the substation with the electrical quantity stored in the safe operation logic library, Figure 2 The middle 303 is used to perform corresponding relay protection actions when the relay protection comparison result conforms to a fault type in the relay protection logic;

[0116] Figure 3 The middle 401 collects the related electrical quantity according to the trigger logic corresponding to the relay protection action, and generates an electrical quantity reference table, Figure 3 The middle 402 fills the collected related electrical quantity into the electrical quantity reference table, Figure 3 The middle 403 is used to directionally mark the change trend of the related electrical quantity in the electrical quantity reference table, and obtain the final reference table;

[0117] Figure 4 The middle 501 records the fault recording data of the substation, Figure 2 The middle 302 retrieves the electrical quantity data at the corresponding time in the fault recording data as reference data according to the collection time of the related electrical quantity in the reference table, and performs reference comparison of the electrical quantity, Figure 4 The middle 503 locates the obviously abnormal electrical quantity data as abnormal data according to the reference comparison result, and performs suspicious abnormality positioning according to the coordinates of the sensor collecting the abnormal data;

[0118] Figure 5 The middle 601 performs similarity comparison of the reference data according to the safe operation logic library, and judges that the comparison result is Figure 2The fault type judged by the middle 303 is consistent, consistent, then judge the fault response is correct; otherwise, inconsistent, then judge the fault response is wrong, after judging that the fault response is correct, Figure 5 The middle 602 obtains the electrical quantity data in the set time before the acquisition time of the related electrical quantity in the reference table as the traceable electrical quantity change data, Figure 5 The middle 603 records the change trend of the traceable electrical quantity change data as Figure 2 The early warning feature of the fault type judged by the middle 303, when the change trend of the electrical quantity data appears in the set time of one half, is consistent with the early warning feature, Figure 5 The middle 604 issues an early warning corresponding to the fault type.

[0119] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A monitoring system for relay protection equipment in intelligent substations, characterized in that: include: Central processing platform and edge processing platform; The central processing platform includes a data analysis unit and an anomaly source location unit; The edge processing platform includes a logical reference unit and a fault analysis unit; The logical reference unit includes a logical relation library, a data comparison module, and a logical response module; The fault analysis unit includes a logic data acquisition module, a data filling module, and an identifier addition module; The data analysis unit includes a fault recording data storage module, a reference comparison module, and an anomaly location module. The anomaly source localization unit includes a logic verification module, an anomaly tracing module, a feature recording module, and an early warning analysis module; The logic relation library establishes a safe operation logic library for corresponding fault types based on the mapping relationship between electrical quantities and relay protection logic. The data comparison module compares the electrical quantities collected by the sensors at the substation site with the electrical quantities stored in the safe operation logic library for relay protection. The logic response module performs relay protection action when the relay protection comparison result matches the fault type in the relay protection logic. The data acquisition module collects relevant electrical quantities according to the triggering logic corresponding to the relay protection action and generates an electrical quantity reference table. The data filling module fills the collected electrical quantities into the electrical quantity reference table; The labeling module marks the changing trends of relevant electrical quantities in the electrical quantity reference table to obtain the final reference table; The fault recording data storage module records fault recording data of the substation; The reference comparison module retrieves the electrical quantity data corresponding to the time in the fault recording data according to the acquisition time of the relevant electrical quantity in the reference table, uses it as reference data, and performs reference comparison of the electrical quantities. The anomaly location module locates abnormal electrical quantity data based on the reference comparison results, treats it as anomaly data, and performs suspicious anomaly location based on the coordinates of the sensor where the abnormal data is collected.

2. The monitoring system for relay protection equipment in intelligent substations as described in claim 1, characterized in that: The logic verification module performs a similarity comparison on the reference data according to the safe operation logic library, and determines the comparison result and the fault type determined by the logic response module. If the fault types are consistent, the fault response is considered correct; if the fault types are inconsistent, the fault response is considered incorrect. After determining that the fault response is correct, the anomaly tracing module obtains electrical quantity data that conforms to the directional marker trend within a set time before the collection time of the relevant electrical quantities in the reference table, and uses it as the electrical quantity change data for tracing. The feature recording module records the changing trend of the traceable electrical quantity change data as a warning feature for the fault type determined by the logic response module; The early warning analysis module issues an early warning for the corresponding fault type when the trend of electrical quantity data changes in accordance with the early warning characteristics within half of a set time period.

3. A method for a monitoring system for relay protection equipment in an intelligent substation, based on any one of claims 1-2, characterized in that: include: Based on the mapping relationship between electrical quantities and relay protection logic, a safe operation logic library corresponding to the fault type is established and stored in the logic relationship library. The data comparison module obtains the electrical quantities collected by the substation field sensors and compares the electrical quantities collected by the substation field sensors with the electrical quantities stored in the safe operation logic library for relay protection. When the relay protection comparison result matches the fault type in the relay protection logic, the logic response module performs the corresponding fault type relay protection action. Based on the triggering logic corresponding to the relay protection action, relevant electrical quantities are collected. An electrical quantity reference table is generated through the logic data acquisition module. The data filling module fills the collected relevant electrical quantities into the electrical quantity reference table. The identification adding module marks the changing trend of relevant electrical quantities in the electrical quantity reference table to obtain the final reference table. The trend of electrical quantities is represented by a slope: Where S represents the slope of the time interval from t1 to t2, and V t1 V represents the electrical quantity measured at time t1. t2 This represents the electrical quantity measured at time t2, where the directional marker is aligned with the direction of slope change; The fault recording data storage module records the fault recording data of the substation. The data comparison module retrieves the electrical quantity data of the corresponding time in the fault recording data according to the acquisition time of the relevant electrical quantity in the reference table, and performs reference comparison of the electrical quantity. Based on the reference comparison result, the anomaly location module locates the abnormal electrical quantity data as abnormal data, and performs suspicious anomaly location based on the coordinates of the sensor where the abnormal data is collected. The determination of abnormal data is represented as follows: Among them, ED represents the similarity, and V ref，i represents the electrical quantity value in the reference table, and V fault，i represents the electrical quantity value corresponding to the time in the fault recording data. A preset similarity alarm threshold G is set. When ED < G, it is determined that the corresponding electrical quantity value is abnormal electrical quantity data, that is, abnormal data; The logic verification module's safe operation logic library performs a similarity comparison on the reference data and determines whether the comparison result matches the fault type determined by the logic response module. If they match, the fault response is deemed correct; otherwise, it is deemed incorrect. After determining that the fault response is correct, the anomaly tracing module obtains electrical quantity data that conforms to the directional marker trend within a set time before the collection time of the relevant electrical quantities in the reference table. This data serves as the traceability electrical quantity change data. The feature recording module records the trend of the traceability electrical quantity change data as a warning feature for the fault type determined by the logic response module. When the trend of the electrical quantity data conforms to the warning feature within half of the set time, the warning analysis module issues an early warning for the corresponding fault type.

4. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the monitoring system for relay protection equipment in intelligent substations as described in claim 3.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the monitoring system for relay protection equipment in intelligent substations as described in claim 3.

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