Monitoring system and method for intelligent substation relay protection equipment

Abstract

The invention relates to the technical field of relay protection, in particular to a monitoring system and method for intelligent substation relay protection equipment, and the system comprises a central processing platform and an edge processing platform. According to the invention, timely and efficient relay protection can be carried out at a near relay protection equipment end, fault recording data comparison processing at a remote relay protection equipment end is matched, fault diagnosis of relay protection equipment is realized, a good self-checking effect is achieved, an abnormal electrical quantity acquisition sensor can be positioned, and convenience is provided for positioning of a fault point of a transformer substation; through marking of directivity trend change and arrangement of traceability electrical quantity change data, a central processing platform of a remote relay protection equipment end is used for analyzing fault recording data, the purpose of carrying out early warning before a transformer substation fault occurs is achieved, and reliable guarantee is provided for lasting and effective operation of the transformer substation.

Description

Technical Field

[0001] The present invention relates to the technical field of relay protection, and in particular to a monitoring system and method for relay protection equipment of an intelligent substation. Background Art

[0002] A smart substation is a substation that uses advanced, reliable, integrated and environmentally friendly intelligent equipment, with full-station information digitization, communication platform networking, and information sharing standardization as basic requirements. It automatically completes basic functions such as information collection, measurement, control, protection, metering and detection. At the same time, it has advanced functions such as supporting real-time automatic control of the power grid, intelligent regulation, online analysis and decision-making, and collaborative interaction.

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

[0004] Based on the search of the above information, it can be seen that the existing monitoring of substation relay protection equipment has the defect of being unable to self-check. When a relay protection equipment failure occurs, the fault cannot be judged in a timely and effective manner, and there is a lack of prediction of the fault.

[0005] In summary, a monitoring system and method for relay protection equipment in smart substations are proposed, which can realize self-inspection of relay protection equipment while ensuring efficient data processing, and can also realize prediction and alarm of faults, with more diversified functions. Summary of the invention

[0006] In view of the above problems existing in the prior art, the present invention is proposed.

[0007] Therefore, the technical problem to be solved by the present invention is: to achieve efficient relay protection by establishing a logic relationship library and sensors to collect changes in electrical quantities, and to perform fault diagnosis of relay protection equipment by comparing remote fault recording data.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a monitoring system for relay protection equipment of a smart substation, comprising: a central processing platform and an edge processing platform.

[0009] As a preferred solution of a monitoring system for relay protection equipment of an intelligent substation described in the present invention, wherein: the central processing platform includes a data analysis unit and an abnormal source positioning unit;

[0010] The edge processing platform includes a logic reference unit and a fault analysis unit.

[0011] As a preferred solution of a monitoring system for relay protection equipment of an intelligent substation described in the present invention, wherein: the logic reference unit includes a logic relationship library, a data comparison module and a logic response module;

[0012] The fault analysis unit includes a logic data acquisition module, a data filling module and an identification adding module;

[0013] The data analysis unit includes a fault recording data storage module, a reference comparison module and an abnormality positioning module;

[0014] The abnormal source positioning unit includes a logic verification module, an abnormal source tracing module, a feature recording module and an early warning analysis module.

[0015] As a preferred solution of a monitoring system for relay protection equipment of a smart substation described in the present invention, wherein: the logic relationship library establishes a safe operation logic library corresponding to the fault type according to the mapping relationship between the electrical quantity and the relay protection logic;

[0016] The data comparison module compares the electrical quantities collected by the substation on-site sensors with the electrical quantities stored in the safety operation logic library for relay protection;

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

[0018] As a preferred solution of the monitoring system for relay protection equipment of a smart substation described in the present invention, wherein: the data acquisition module collects relevant electrical quantities according to the 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 performs directional marking on the change trend of the relevant electrical quantities in the electrical quantity reference table to obtain the final reference table.

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

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

[0023] The abnormality locating module locates abnormal electrical quantity data as abnormal data according to the reference comparison result, and locates the suspected abnormality according to the coordinates of the abnormal data acquisition sensor.

[0024] As a preferred solution of a monitoring system for relay protection equipment of a smart substation described in the present invention, wherein: 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;

[0025] When the fault types are consistent, the fault response is judged to be correct; when the fault types are inconsistent, the fault response is judged to be wrong;

[0026] The abnormality tracing module, after determining that the fault response is correct, obtains the electrical quantity data that conforms to the directional marking trend within a set time before the collection time of the relevant electrical quantity in the reference table as the tracing electrical quantity change data;

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

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

[0029] Another object of the present invention is to provide a monitoring method for relay protection equipment in an intelligent substation, which can provide effective early warning before a relay protection equipment failure occurs, timely discover potential failure risks through comparison and processing of a logical relationship library with fault data, and issue a warning signal based on the changing trend of electrical quantity data, thereby ensuring the stable operation of the substation and avoiding large-scale power outages or other accidents caused by equipment failures.

[0030] To solve the above technical problems, the present invention provides the following technical solutions: A monitoring method for relay protection equipment in an intelligent substation, including: establishing a safety operation logic library corresponding to the fault type according to the mapping relationship between electrical quantities and relay protection logic, storing it in the logic relationship library, the data comparison module obtains the electrical quantities collected by the on-site sensors in the substation, and compares the electrical quantities collected by the on-site sensors in the substation with the electrical quantities stored in the safety operation logic library for relay protection comparison. 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;

[0031] Collect relevant electrical quantities according to the trigger logic corresponding to the relay protection action, generate an electrical quantity reference table through the logic data acquisition module, the data filling module fills the collected relevant electrical quantities into the electrical quantity reference table, and the identification adding module makes a directional mark on the change trend of the relevant electrical quantities in the electrical quantity reference table to obtain the final reference table;

[0032] Among them, the change trend of the electrical quantity is represented by the slope:

[0033]

[0034] Among them, S represents the slope in the time period from t1 to t2, V t1 represents the electrical quantity value measured at time t1, V t2 represents the electrical quantity value measured at time t2, where the directional mark is consistent with the slope change direction;

[0035] The fault recording data storage module records the fault recording data of the substation. The data comparison module retrieves the electrical quantity data corresponding to the corresponding time in the fault recording data according to the acquisition time of the relevant electrical quantities in the reference table as the reference data, and conducts a reference comparison of the electrical quantities. According to the reference comparison result, the abnormal location module locates the significantly abnormal electrical quantity data as the abnormal data, and conducts a suspicious abnormal location according to the coordinates of the sensor where the abnormal data is collected;

[0036] Among them, the judgment of abnormal data is expressed as:

[0037]

[0038] Among them, ED represents the similarity, V ref，i represents the electrical quantity value in the reference table, V fault，i represents the electrical quantity value corresponding to the corresponding 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;

[0039] The logic verification module safely runs the logic library to perform a similarity comparison on the reference data, and determines the comparison result and the fault type determined by the logic response module. If they are consistent, the fault response is determined to be correct. If they are inconsistent, the fault response is determined to be wrong. After determining that the fault response is correct, the abnormal tracing module obtains the electrical quantity data that meets the directional marking trend within the set time before the collection time of the relevant electrical quantity in the reference table as the traceable electrical quantity change data. The feature recording module records the change trend of the traceable electrical quantity change data as the early warning feature of the fault type determined 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.

[0040] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and is characterized in that when the processor executes the computer program, the steps of a monitoring system for relay protection equipment of an intelligent substation as described above are implemented.

[0041] A computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps of a monitoring system for relay protection equipment of an intelligent substation as described above are implemented.

[0042] Beneficial effects of the present invention: The present invention establishes a logical relationship library and collects electrical quantity changes through sensors, so that timely and efficient relay protection can be performed at the local relay protection device end, and the fault recording data comparison and processing at the remote relay protection device end can be coordinated to realize fault diagnosis of the relay protection equipment. While having a good self-test effect, it can also locate the abnormal electrical quantity collection sensor, providing convenience for locating the fault point of the substation; through the marking of directional trend changes and the sorting of traceable electrical quantity change data, the central processing platform of the remote relay protection device end is used to analyze the fault recording data, so as to achieve the purpose of early warning before the substation failure occurs, and provide reliable guarantee for the long-term and effective operation of the substation. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0044] Figure 1 A principle block diagram of a monitoring system for relay protection equipment in a smart substation provided by an embodiment of the present invention.

[0045] Figure 2A principle block diagram of a logic reference unit of a monitoring system for relay protection equipment in an intelligent substation provided by an embodiment of the present invention.

[0046] Figure 3 A principle block diagram of a fault analysis unit of a monitoring system for relay protection equipment in a smart substation provided by an embodiment of the present invention.

[0047] Figure 4 A principle block diagram of a data analysis unit of a monitoring system for relay protection equipment in a smart substation provided by an embodiment of the present invention.

[0048] Figure 5 A principle block diagram of an abnormal source locating unit of a monitoring system for relay protection equipment of an intelligent substation provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0049] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0050] Example 1, reference Figure 1-Figure 5 , is an embodiment of the present invention, which provides a monitoring system for relay protection equipment of a smart substation, including:

[0051] S1: Central processing platform and edge processing platform.

[0052] It should be noted that the central processing platform communicates with the edge processing platform via Ethernet, including a data analysis unit and an abnormal source locating unit, and the data analysis unit is connected to the abnormal source locating unit;

[0053] The edge processing platform includes a logic reference unit and a fault analysis unit, and the logic reference unit is connected to the fault analysis unit;

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

[0055] Further, the logic reference unit includes a logic relationship library, a data comparison module and a logic response module, and the logic relationship library is connected to the data comparison module, and the data comparison module is connected to the logic response module;

[0056] The fault analysis unit includes a logic data acquisition module, a data filling module and an identification adding module, and the logic data acquisition module is connected to the data filling module, and the data filling module is connected to the identification adding module;

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

[0058] The abnormal source positioning unit includes a logic verification module, an abnormal source tracing module, a feature recording module and an early warning analysis module, and the logic verification module is connected to the abnormal source tracing module, the abnormal source tracing module is connected to the feature recording module, and the feature recording module is connected to the early warning analysis module.

[0059] Furthermore, the logic relationship library establishes a safe operation logic library corresponding to different fault types based on the mapping relationship between electrical quantities and relay protection logic;

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

[0061] The logic response module performs relay protection action when the relay protection comparison result meets the fault type in the relay protection logic;

[0062] The data acquisition 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 makes directional marks on the changing trends of related electrical quantities in the electrical quantity reference table to obtain the final reference table;

[0065] Fault recording data storage module, recording 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 according to the collection time of the relevant electrical quantity in the reference table as reference data, and performs reference comparison of the electrical quantity;

[0067] The abnormality positioning module locates the abnormal electrical quantity data according to the reference comparison results as abnormal data, and locates the suspected abnormality according to the coordinates of the abnormal data collection sensor;

[0068] The logic verification module compares the reference data for similarity according to the safe operation logic library and determines the fault type determined by the comparison result and the logic response module;

[0069] When the fault types are consistent, the fault response is judged to be correct; when the fault types are inconsistent, the fault response is judged to be wrong;

[0070] The abnormal tracing module, after judging that the fault response is correct, obtains the electrical quantity data that conforms to the directional marking trend within the set time before the collection time of the relevant electrical quantity in the reference table as the tracing electrical quantity change data;

[0071] The feature recording module records the change trend of the traceable electrical quantity change data as the early warning feature of the fault type judged by the logic response module;

[0072] The early warning analysis module issues an early warning of the corresponding fault type when the changing trend of the electrical quantity data meets the early warning characteristics within half of the set time.

[0073] The above is a schematic scheme of a monitoring system for relay protection equipment of a smart substation in this embodiment. It should be noted that the technical scheme of the system for monitoring relay protection equipment of a smart substation and the technical scheme of the monitoring system for relay protection equipment of a smart substation mentioned above belong to the same concept. The details of the technical scheme of the monitoring method for relay protection equipment of a smart substation in this embodiment that are not described in detail can all be referred to the description of the technical scheme of the monitoring system for relay protection equipment of a smart substation mentioned above.

[0074] In this embodiment, a monitoring method for relay protection equipment of a smart substation is characterized by: comprising: 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 the data in the logic relationship library, a data comparison module acquiring the electrical quantity collected by the substation field sensor, and performing relay protection comparison between the electrical quantity collected by the substation field sensor and the electrical quantity stored in the safe operation logic library, and when the relay protection comparison result conforms to the fault type in the relay protection logic, the logic response module performs a relay protection action corresponding to the fault type;

[0075] According to the trigger logic corresponding to the relay protection action, relevant electrical quantities are collected, and an electrical quantity reference table is generated through the logic data collection module. The data filling module fills the collected relevant electrical quantities into the electrical quantity reference table. The identification adding module performs directional marking on the change trend of the relevant electrical quantities in the electrical quantity reference table to obtain the final reference table;

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

[0077]

[0078] Where S represents the slope from t1 to t2, V t1 Represents the electrical value measured at time t1, V t2 Indicates the electrical value measured at time t2, where the directional mark is consistent with the direction of slope change;

[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 according to the collection time of the relevant electrical quantity in the reference table as reference data, and performs reference comparison of the electrical quantity. According to the reference comparison result, the abnormality positioning module locates the obviously abnormal electrical quantity data as abnormal data, and locates the suspected abnormality according to the coordinates of the abnormal data collection sensor;

[0080] Among them, the judgment of abnormal data is expressed as:

[0081]

[0082] Among them, ED represents the similarity, V ref，i Indicates the electrical value in the reference table, V fault，i Indicates the electrical quantity value at the corresponding time in the fault recording data, and presets the similarity alarm threshold G. When ED<G, the corresponding electrical quantity value is judged to be obviously abnormal electrical quantity data, that is, abnormal data;

[0083] The logic verification module safely runs the logic library to perform a similarity comparison on the reference data, and determines the comparison result and the fault type determined by the logic response module. If they are consistent, the fault response is determined to be correct. If they are inconsistent, the fault response is determined to be wrong. After determining that the fault response is correct, the abnormal tracing module obtains the electrical quantity data that meets the directional marking trend within the set time before the collection time of the relevant electrical quantity in the reference table as the traceable electrical quantity change data. The feature recording module records the change trend of the traceable electrical quantity change data as the early warning feature of the fault type determined 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] This embodiment further provides a computing device, which is applicable to a monitoring system for a relay protection device of a smart substation, and includes:

[0085] Memory and processor; the memory is used to store computer executable instructions, and the processor is used to execute computer executable instructions to implement a monitoring system for relay protection equipment of a smart substation as proposed in the above embodiment.

[0086] This embodiment also provides a storage medium on which a computer program is stored. When the program is executed by a processor, a monitoring system for relay protection equipment of a smart substation as proposed in the above embodiment is implemented.

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

[0088] If the functions are implemented in the form of 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 the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

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

[0090] A "computer-readable medium" can be any apparatus that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

[0091] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0092] Example 2, reference Figure 1-Figure 5, is an embodiment of the present invention, which provides a monitoring system for relay protection equipment in a smart substation.

[0093] In the figure:

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

[0095] Figure 2 : 3 represents a logic reference unit; 301 represents a logic relationship library; 302 represents a data comparison module; 303 represents a logic response module.

[0096] Figure 3 : 4 represents a fault analysis unit; 401 represents a logic data acquisition module; 402 represents a data filling module; 403 represents an identification adding module;

[0097] Figure 4 : 5 represents a data analysis unit; 501 represents a fault recording data storage module; 502 represents a reference comparison module; 503 represents an abnormality positioning module;

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

[0099] A monitoring system for relay protection equipment in an intelligent substation, comprising Figure 1 Among them, 3 and 4 form 2, 5 and 6 form 1, and 1 communicates with 2 via Ethernet, wherein 2 is set at the near relay protection device end, and several 2 may be set, and 1 is set at the far relay protection device end.

[0100] Figure 2 The 3 in 301 include 301, 302 and 303. Figure 2 301 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 2 301 and 302 are connected. Figure 2 302 is used to compare the electrical quantities collected by the substation field sensors with the electrical quantities stored in the safety operation logic library for relay protection;

[0102] Figure 2 302 and 303 are connected. Figure 2 303 is used to perform corresponding relay protection actions when the relay protection comparison result meets a certain fault type in the relay protection logic.

[0103] Figure 2 Middle 3 and Figure 3 Middle 4 docking, Figure 3 4 includes 401 and 402, 401 is used to collect relevant electrical quantities according to the trigger logic corresponding to the relay protection action, and generate an electrical quantity reference table;

[0104] Figure 3 401 and 402 are connected. Figure 3 402 is used to fill the collected related electrical quantities into the electrical quantity reference table.

[0105] Figure 3 Middle 4 and Figure 4 Middle 5 docking, Figure 4 5 includes 501, 502 and 503, 501 is used to record the fault recording data of the substation;

[0106] Figure 4 501 and 502 are connected. Figure 4 502 is used to retrieve the electrical quantity data of the corresponding time in the fault recording data according to the collection time of the relevant electrical quantity in the reference table as reference data, and perform reference comparison of the electrical quantity;

[0107] Figure 2 302 and Figure 4 Zhong503 docking, Figure 4 503 is used to locate obviously abnormal electrical quantity data according to the reference comparison result as abnormal data, and locate the suspected abnormality according to the coordinates of the sensor where the abnormal data is collected.

[0108] Figure 4 5 and Figure 5 Middle 6 docking, Figure 2 Middle 3 and Figure 5 Middle 6 docking, Figure 5 6 is used to compare the similarity of the reference data according to the safe operation logic library, and determine whether the comparison result is Figure 2 Whether the fault types judged in step 303 are consistent, if they are consistent, it is judged that the fault response is correct; if they are inconsistent, it is judged that the fault response is wrong.

[0109] Realize the detection of whether there is any fault in the operation of relay protection equipment.

[0110] A monitoring system for relay protection equipment in an intelligent substation, further comprising Figure 3 In 403, 402 and 403 are connected. Figure 3 403 is used to mark the change trend of the relevant electrical quantity in the electrical quantity reference table in a directional manner to obtain the final reference table.

[0111] and, Figure 5601 is connected with 602. After judging that the fault response is correct, 602 is used to obtain the electrical quantity data that meets the directional mark trend within the set time before the collection time of the relevant electrical quantity in the reference table as the traceability electrical quantity change data;

[0112] Figure 5 602 is connected with 603, and 603 is used to record the trend of the traceability electrical quantity change data. Figure 2 The early warning characteristics of the fault type judged by 303;

[0113] Figure 5 603 is connected with 604, and 604 is used to issue an early warning of the corresponding fault type when the change trend of the electrical quantity data meets the warning characteristics within half of the set time.

[0114] Realize early warning of corresponding fault types.

[0115] Figure 2 According to the mapping relationship between electrical quantities and relay protection logic, a safe operation logic library corresponding to different fault types is established in 301. Figure 2 302 compares the electrical quantities collected by the substation field sensors with the electrical quantities stored in the safety operation logic library for relay protection. Figure 2 303 is used to perform corresponding relay protection actions when the relay protection comparison result meets a certain fault type in the relay protection logic;

[0116] Figure 3 401 collects relevant electrical quantities according to the trigger logic corresponding to the relay protection action, and generates an electrical quantity reference table. Figure 3 In 402, the collected relevant electrical quantities are filled into the electrical quantity reference table. Figure 3 403 is used to mark the change trend of the relevant electrical quantity in the electrical quantity reference table in a directional manner to obtain the final reference table;

[0117] Figure 4 501 records the fault recording data of the substation. Figure 2 In 302, according to the collection time of the relevant electrical quantity in the reference table, the electrical quantity data of the corresponding time in the fault recording data is retrieved as reference data, and the reference comparison of the electrical quantity is performed. Figure 4 In step 503, the obviously abnormal electrical quantity data is located according to the reference comparison result as abnormal data, and the suspected abnormality is located according to the coordinates of the sensor where the abnormal data is collected;

[0118] Figure 5 601 performs similarity comparison on the reference data according to the safe operation logic library, and determines whether the comparison result is consistent with Figure 2In 303, the fault types are determined to be consistent. If they are consistent, the fault response is determined to be correct. Otherwise, the fault response is determined to be wrong. After the fault response is determined to be correct, Figure 5 602 obtains the electrical quantity data that conforms to the directional mark trend within the set time before the collection time of the relevant electrical quantity in the reference table as the traceability electrical quantity change data. Figure 5 The trend of the change data of the traceable electrical quantity is recorded in 603 as Figure 2 The warning characteristics of the fault type judged by 303 in the above example are as follows: When the change trend of the electrical quantity data meets the warning characteristics within half of the set time, Figure 5 604 issues an early warning of the corresponding fault type.

[0119] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention 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 invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A monitoring system for relay protection equipment in smart substations, characterized in that: include: Central processing platform and edge processing platform.

2. A monitoring system for relay protection equipment in a smart substation according to claim 1, characterized in that: The central processing platform includes a data analysis unit and an abnormal source positioning unit; The edge processing platform includes a logic reference unit and a fault analysis unit.

3. A monitoring system for relay protection equipment of a smart substation according to claim 2, characterized in that: The logic reference unit includes a logic relationship library, a data comparison module and a logic response module; The fault analysis unit includes a logic data acquisition module, a data filling module and an identification adding module; The data analysis unit includes a fault recording data storage module, a reference comparison module and an abnormality positioning module; The abnormal source positioning unit includes a logic verification module, an abnormal source tracing module, a feature recording module and an early warning analysis module.

4. A monitoring system for relay protection equipment in a smart substation according to claim 3, characterized in that: The logic relationship library establishes a safe operation logic library corresponding to the fault type according to the mapping relationship between the electrical quantity and the relay protection logic; The data comparison module compares the electrical quantities collected by the substation on-site sensors with the electrical quantities stored in the safety operation logic library for relay protection; The logic response module performs relay protection action when the relay protection comparison result conforms to the fault type in the relay protection logic.

5. A monitoring system for relay protection equipment of a smart substation according to claim 4, characterized in that: The data acquisition module collects relevant electrical quantities according to the trigger logic corresponding to the relay protection action and generates an electrical quantity reference table; The data filling module fills the collected relevant electrical quantities into the electrical quantity reference table; The identification adding module performs directional marking on the change trend of the relevant electrical quantities in the electrical quantity reference table to obtain the final reference table.

6. A monitoring system for relay protection equipment in a smart substation according to claim 5, characterized in that: The fault recording data storage module records the fault recording data of the substation; The reference comparison module retrieves the electrical quantity data of the corresponding time in the fault recording data according to the collection time of the relevant electrical quantity in the reference table as reference data, and performs reference comparison of the electrical quantity; The abnormality locating module locates abnormal electrical quantity data as abnormal data according to the reference comparison result, and locates the suspected abnormality according to the coordinates of the abnormal data acquisition sensor.

7. A monitoring system for relay protection equipment in a smart substation according to claim 6, 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; When the fault types are consistent, the fault response is judged to be correct; when the fault types are inconsistent, the fault response is judged to be wrong; The abnormality tracing module, after determining that the fault response is correct, obtains the electrical quantity data that conforms to the directional marking trend within a set time before the collection time of the relevant electrical quantity in the reference table as the tracing electrical quantity change data; The feature recording module records the change trend of the traceable electrical quantity change data as the early warning feature of the fault type determined by the logic response module; The early warning analysis module issues an early warning of the corresponding fault type when the change trend of the electrical quantity data meets the early warning characteristics within half of the set time.

8. A method for a monitoring system for relay protection equipment of a smart substation based on any one of claims 1 to 7, characterized in that: include: According to 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 performs relay protection comparison on the electrical quantities collected by the substation field sensors and the electrical quantities stored in the safe operation logic library. 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. According to the trigger logic corresponding to the relay protection action, relevant electrical quantities are collected, and an electrical quantity reference table is generated through the logic data collection module. The data filling module fills the collected relevant electrical quantities into the electrical quantity reference table. The identification adding module performs directional marking on the change trend of the relevant electrical quantities in the electrical quantity reference table to obtain the final reference table; Among them, the change trend of electrical quantity is expressed by slope: Where S represents the slope from t1 to t2, V t1 Represents the electrical value measured at time t1, V t2 Indicates the electrical value measured at time t2, where the directional mark is consistent 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 collection time of the relevant electrical quantity in the reference table as reference data, and performs reference comparison of the electrical quantity. According to the reference comparison result, the abnormality positioning module locates the abnormal electrical quantity data as abnormal data, and locates the suspected abnormality according to the coordinates of the abnormal data collection sensor; Among them, the judgment of abnormal data is expressed as: 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 safely runs the logic library to perform a similarity comparison on the reference data, and determines the comparison result and the fault type determined by the logic response module. If they are consistent, the fault response is determined to be correct. If they are inconsistent, the fault response is determined to be wrong. After determining that the fault response is correct, the abnormal tracing module obtains the electrical quantity data that meets the directional marking trend within the set time before the collection time of the relevant electrical quantity in the reference table as the traceable electrical quantity change data. The feature recording module records the change trend of the traceable electrical quantity change data as the early warning feature of the fault type determined 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.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of a monitoring system for relay protection equipment of an intelligent substation as described in claim 8 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of a monitoring system for relay protection equipment of an intelligent substation as described in claim 8 are implemented.

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