Autonomous learning method for standard circuit library of intelligent substation

Abstract

The invention relates to the technical field of intelligent substation configuration file checking, in particular to an intelligent substation standard circuit library autonomous learning method, which comprises the following steps of: constructing a standard IED (Intelligent Electronic Device) and a virtual terminal model, and providing a unified standard for substation components and connection; adjusting the IED information in the SCD file to match a standard IED model; extracting virtual loop configuration of the IED from the SCD file by using a standard virtual terminal model and standardizing the virtual loop configuration of the IED; summarizing all standardized loop configurations to form a to-be-effective loop library, and recording occurrence frequencies according to categories; performing pre-effective marking on the frequently appearing virtual loop configuration; comparing the pre-effective loop with the to-be-effective loop library, and marking the pre-effective loop as an effective standard loop after confirmation; extracting information from the effective standard loop, and establishing a complete standard loop library; and updating and perfecting the standard loop library by continuously learning new SCD files. The method has the beneficial effects that automatic establishment and updating of the standard virtual loop library can be realized by utilizing SCD file information extraction and statistical analysis.

Description

Technical Field

[0001] The invention relates to the technical field of intelligent substation configuration file verification, in particular to an intelligent substation standard circuit library autonomous learning method. Background Art

[0002] At present, the SCD files of smart substations mainly rely on manual configuration, which is a complicated process, especially for the configuration of virtual terminal circuits. It is necessary to manually complete the virtual terminal connection configuration, which is prone to configuration errors. The virtual terminal connection configuration is affected by differences in different periods, regions, and ICD models, resulting in some differentiated connection methods, which increases the difficulty of configuration and configuration inspection. In recent years, some emerging SCD file virtual circuit automatic verification technologies rely on accurate standard virtual circuits to achieve automatic verification, while the process of establishing a standard virtual circuit library lacks actual technical support. At present, there is no existing technology that can realize automatic modeling of SCD file standard circuits, which makes it impossible to effectively carry out related configuration management, configuration inspection, and configuration verification. Summary of the invention

[0003] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0004] Therefore, the purpose of the present invention is to provide an autonomous learning method for a standard circuit library of an intelligent substation, which can utilize SCD file information extraction and statistical analysis to realize the automatic establishment and update of a standard virtual circuit library.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: an autonomous learning method for a standard circuit library of a smart substation, which includes establishing a standard IED and virtual terminal model to provide a standardized description for components and connections of the smart substation;

[0006] Preprocess the SCD file to match the standard IED model;

[0007] Extract and standardize the virtual circuit configuration of IED from SCD files using standard virtual terminal model;

[0008] Summarize all standardized circuit configurations to form a library of circuits to be effective, and record the frequency of occurrence by category;

[0009] Pre-validate frequently occurring virtual circuit configurations;

[0010] Compare the pre-effective circuit with the template in the standard circuit library to be effective, and confirm that the consistent circuit is the effective standard circuit;

[0011] Extract the final standard circuit from the effective standard circuit to build a complete standard circuit library;

[0012] Update and improve the standard circuit library by continuously learning new SCD files.

[0013] As a preferred solution of the autonomous learning method of the standard circuit library of the intelligent substation of the present invention, the standard IED model includes standard naming, GOOSE sending standard virtual terminals, GOOSE receiving standard virtual terminals, SV sending standard virtual terminals, and SV receiving standard virtual terminals.

[0014] As a preferred solution of the autonomous learning method of the standard circuit library of the intelligent substation of the present invention, the standard naming uses a set of coding attributes to describe the standard IED model object, and the specific coding attributes include voltage level, wiring type, bay type, and equipment type.

[0015] As a preferred solution of the autonomous learning method of the standard circuit library of the intelligent substation of the present invention, the standard virtual terminal recognition model includes defining a matching relationship algorithm for virtual terminals, taking the standard virtual terminals as the first type of virtual terminals, taking the actual virtual terminals of the IED in the engineering SCD file as the second type of virtual terminals, comparing the keyword combinations in the first type of virtual terminals and the second type of virtual terminals, and determining whether the standard virtual terminals and the actual virtual terminals are compatible based on the comparison results.

[0016] As a preferred solution of the autonomous learning method of the standard circuit library of the intelligent substation of the present invention, the preprocessing of the SCD file includes extracting the attribute information of the IED based on the IED naming information, assigning the coding attributes of the standard naming corresponding to the standard IED model to the IED in the SCD file, and obtaining the relationship between each IED and the standard IED model.

[0017] As a preferred solution of the autonomous learning method of the standard circuit library of the intelligent substation of the present invention, the identification classification of the standard circuit library includes virtual circuit configuration identification, configuration item classification, and configuration group counting.

[0018] As a preferred solution of the autonomous learning method of the standard circuit library of the intelligent substation of the present invention, the standard circuit includes the standard circuit to be effective, the pre-effective circuit, and the effective standard circuit, which are formed in sequence before the final standard circuit library is formed.

[0019] As a preferred solution of the method for autonomous learning of the standard circuit library of the intelligent substation of the present invention, the standard circuit to be effective refers to the circuit relationship described by the standard virtual terminal extracted from any SCD file.

[0020] As a preferred solution of the autonomous learning method of the standard circuit library of the intelligent substation of the present invention, the pre-validated circuit refers to counting the virtual circuits that can be classified into a configuration group that have been discovered in the past, and setting a counting threshold.

[0021] As a preferred solution of the autonomous learning method of the standard circuit library of the intelligent substation of the present invention, wherein: the effective standard circuit refers to the corresponding standard circuit to be effective when the pre-effective circuit exists in the standard circuit to be effective.

[0022] Beneficial effects of the present invention: The present invention reduces the need for manual configuration and improves the reliability of verification by establishing and maintaining a standard virtual circuit library for smart substations. Through autonomous learning, the accuracy and consistency of virtual circuit configuration are ensured, and the risk of configuration errors is reduced. Through automated circuit library management, the digitalization and automation level of operation and maintenance of smart substations is improved, thereby improving the overall operation and maintenance efficiency. The method can adapt to the differences in different regions, periods and ICD models, enhance the versatility and flexibility of the circuit library, and through continuous learning and updating, the standard circuit library can be continuously optimized to adapt to new configuration requirements and technical standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0024] Figure 1 The overall process diagram of the autonomous learning method of the standard circuit library of the smart substation is shown in Figure 2.

[0025] Figure 2 Schematic diagram of IED naming rules for the autonomous learning method of the smart substation standard circuit library. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, 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 accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0029] Example 1

[0030] Reference Figure 1-2 , is an embodiment of the present invention, which provides an autonomous learning method for a standard circuit library of an intelligent substation, which can utilize SCD file information extraction and statistical analysis to realize the automatic establishment and update of a standard virtual circuit library.

[0031] Specifically, a standard IED and virtual terminal model is established to provide a standardized description of the components and connections of smart substations;

[0032] Preprocess the SCD file to match the standard IED model;

[0033] Extract and standardize the virtual circuit configuration of IED from SCD files using standard virtual terminal model;

[0034] Summarize all standardized circuit configurations to form a library of circuits to be effective, and record the frequency of occurrence by category;

[0035] Pre-validate frequently occurring virtual circuit configurations;

[0036] Compare the pre-effective circuit with the template in the standard circuit library to be effective, and confirm that the consistent circuit is the effective standard circuit;

[0037] Extract the final standard circuit from the effective standard circuit to build a complete standard circuit library;

[0038] Update and improve the standard circuit library by continuously learning new SCD files.

[0039] Furthermore, the standard IED model includes standard naming, GOOSE sending standard virtual terminal, GOOSE receiving standard virtual terminal, SV sending standard virtual terminal, and SV receiving standard virtual terminal.

[0040] Furthermore, the standard naming uses a set of coded attributes to describe the standard IED model objects, and the specific coded attributes include voltage level, wiring type, bay type, and device type.

[0041] It should be noted that the voltage levels include: general purpose; 10kV; 20kV; 35kV; 66kV; 110kV; 220kV; 330kV; 500kV; 750kV; 1000kV;

[0042] Wiring types include: 0: general purpose; 1: 10kV; 2: 20kV; 3: 35kV; 4: 66kV; 5: 110kV; 6: 220kV; 7: 330kV; 8: 500kV; 9: 750kV; 10: 1000kV;

[0043] Bay types include: 0: general; 1: single mother; 2: single mother segmented; 3: single mother two segments; 4: single mother three segments; 5: double mother; 6: double mother double segmented; 7: double mother single segmented; 8: inner bridge; 9: enlarged inner bridge; 10: outer bridge; 11: enlarged outer bridge; 12: 3 / 2 connection; 13: line transformer group connection; 14: angle connection; 15: quadrilateral connection; 16: 4 / 3 connection;

[0044] Equipment types include: 0: general; 1: protection; 2: measurement and control; 3: integrated protection and measurement; 4: intelligent terminal; 5: merging unit; 6: integrated intelligence; 7: acquisition and execution unit; 8: stabilization and control; 9: standby and automatic investment; 10: fault recording; 11: independent protection.

[0045] Specifically, the standard IED model objects of common IEDs are described with specific coding attributes, which are expressed as follows: 6_5_1_1 is 220kV double-mother wiring line protection; 6_5_1_4 is 220kV double-mother wiring line intelligent terminal; 6_5_1_5 is 220kV double-mother wiring line merging unit; 6_5_1_5 is 220kV double-mother wiring bus protection.

[0046] Furthermore, the standard virtual terminal identification model includes defining a matching relationship algorithm for virtual terminals, taking the standard virtual terminals as the first type of virtual terminals, taking the actual virtual terminals of the IED in the engineering SCD file as the second type of virtual terminals, comparing the keyword combinations in the first type of virtual terminals and the second type of virtual terminals, and determining whether the standard virtual terminals and the actual virtual terminals are compatible based on the comparison results.

[0047] It should be noted that the matching relationship algorithm for defining virtual terminals specifically includes taking the standard virtual terminal as the first type of virtual terminal, taking the actual virtual terminal of the IED in the project SCD file as the second type of virtual terminal, decomposing the first type of virtual terminal into a combination of keywords M, and providing a group of negative keyword combinations N, and searching in the second type of virtual terminals whether the keyword combination M and the keyword combination N exist. If M exists and N does not exist, it is determined that the corresponding standard virtual terminal is compatible with the actual virtual terminal; if M does not exist or N exists, it is determined that the corresponding standard virtual terminal is not compatible with the actual virtual terminal.

[0048] Specifically, for example, the first type of virtual terminals are defined for the device corresponding to the coding attribute 6_5_1_1 (220kV double-mother wiring line protection), including:

[0049] GOOSE output virtual terminal: trip circuit breaker A phase, trip circuit breaker B phase, trip circuit breaker C phase, reclosing, locking reclosing;

[0050] GOOSE input virtual terminal: circuit breaker A phase position TWJa, circuit breaker B phase position TWJb, circuit breaker C phase position TWJc, low pressure lockout reclosing, lockout reclosing-1;

[0051] SV input virtual terminal: rated delay, protection A phase current Ia1, protection A phase current Ia2, protection B phase current Ib1, protection B phase current Ib2, protection C phase current Ic1, protection C phase current Ic2, protection A phase voltage Ua1, protection A phase voltage Ua2, protection B phase voltage Ub1, protection B phase voltage Ub2, protection C phase voltage Uc1, protection C phase voltage Uc2, synchronous voltage 1, synchronous voltage 2.

[0052] In the actual engineering SCD, the protection device of a 220kV line corresponds to the IED with the second type of virtual terminals, including:

[0053] GOOSE output virtual terminals: trip switch A phase, trip switch B phase, trip switch C phase, reclosing switch outlet, locked reclosing switch;

[0054] GOOSE input virtual terminal: switch A phase position, switch B phase position, switch C phase position, low pressure reclosing, locked reclosing 1;

[0055] SV input virtual terminal: rated delay, protection A phase current 1, protection A phase current 2, protection B phase current 1, protection B phase current 2, protection C phase current 1, protection C phase current 2, protection A phase voltage 1, protection A phase voltage 2, protection B phase voltage 1, protection B phase voltage 2, protection C phase voltage 1, protection C phase voltage 2, synchronous voltage 1, synchronous voltage 2.

[0056] Based on the above content, a keyword combination M and a negative keyword combination N of the first type of virtual terminal are formed, and two virtual terminals are selected from each for specific description:

[0057] For example, the GOOSE output virtual terminal with coding attribute 6_5_1_1:

[0058] Among them, trip the circuit breaker A phase: M = {(trip|exit) & A}, N = {reclosing}, in the expressions of M and N, the symbol | represents or, the symbol & represents and, the brackets represent priority calculation, and null represents empty, the same below. In this example, M = {(trip|exit) & A} means that the keyword trip or exit exists, and the keyword A must also exist, and N = {reclosing} means that the keyword reclosing does not exist, the same below.

[0059] Lock and reclose: M = {lock|close}, N = {null}

[0060] GOOSE input virtual terminal with coding attribute 6_5_1_1:

[0061] Circuit breaker A phase position TWJa: M = {((circuit breaker|switch)&A)|TWJa}, N = {null}

[0062] Low pressure lockout reclosing: M = {(lockout|closed reclosing) & (low pressure|pressure)}, N = {null}

[0063] SV input virtual terminal with coding attribute 6_5_1_1:

[0064] Protect phase A current 1: M = {(current & (A & 1)) | Ia1}, N = {voltage}

[0065] Synchronous voltage 1: M = {synchronous & 1}, N = {A | B | C}

[0066] According to the above strategy, combined with the virtual terminals of the IED corresponding to the protection device of a 220kV line in the engineering SCD, the following adaptation relationship can be found:

[0067] GOOSE output virtual terminal: trip circuit breaker phase A - trip switch phase A; lock reclosing - lock reclosing;

[0068] GOOSE input virtual terminal: Circuit breaker A phase position TWJa-switch A phase position; Low pressure lock reclosing-low pressure lock reclosing;

[0069] SV input virtual terminal: protection A phase current 1-protection A phase current 1; synchronous voltage 1-synchronous voltage 1.

[0070] Furthermore, the preprocessing of the SCD file includes extracting the attribute information of the IED based on the IED naming information, assigning the coding attributes of the standard naming corresponding to the standard IED model to the IED in the SCD file, and obtaining the relationship between each IED and the standard IED model.

[0071] It should be noted that extracting IED naming information specifically includes: Figure 2 As shown, according to the specification, the IED name is 8 characters, of which the 1st and 2nd characters indicate the device type, the 3rd character indicates the interval type, the 4th and 5th characters indicate the voltage level, the 6th and 7th characters indicate the interval number, and the 8th character indicates the set. The 1st and 2nd characters of the IED name are extracted as the device type information, the 3rd character is extracted as the interval type information, and the 4th and 5th characters are extracted as the voltage level information.

[0072] Based on the IED naming, the three coding attributes of IED, namely voltage level, bay type and device type, can be directly obtained. The last type of wiring type coding attribute is obtained based on the following strategy:

[0073] Strategy 1, typical design strategy, for IEDs with voltage levels of 500 kV and above, the default wiring type is 3 / 2 wiring. In particular, if there is only one set of main transformers and one line without busbar bays, it is modified to line-transformer group wiring;

[0074] Strategy 2, bus tie and segment bay quantity strategy: if there is only one bus tie bay at any voltage level, it is determined as a double bus connection; if there is only one segment bay, it is determined as a single bus segment bay; if there are two bus ties and one segment bay, it is determined as a double bus single tap connection; if there are two bus ties and two segment bays, it is determined as a double bus double tap connection;

[0075] If the wiring type coding attributes cannot be obtained automatically or do not match the actual wiring type, specify them manually.

[0076] It should be noted that whether the wiring type coding attributes are automatically obtained does not affect the self-learning of the standard circuit library. On the one hand, the wiring type attributes can be replaced by the general attribute 0. On the other hand, manually specifying the wiring type coding attributes is an accurate and fast process for determining the wiring type attribute coding of the IED, and will not cause a loss of accuracy or efficiency.

[0077] Furthermore, the identification and classification of the standard circuit library includes virtual circuit configuration identification, configuration item classification, and configuration group counting.

[0078] It should be noted that the specific steps of identifying and classifying the standard circuit library include:

[0079] Based on the matching relationship algorithm of the defined virtual terminals, the virtual circuit configuration items of the IED in the SCD file are identified and extracted to form a circuit configuration with the standard IED coding attributes as the upper-level object and the standard virtual terminals as the content description;

[0080] The virtual circuit configuration items of the IEDs identified and extracted from the SCD file are classified into categories, and the categories describe the specific circuits with specific standard IED coding attributes and standard virtual terminals to form a group of configuration groups;

[0081] The counter counts the formed configuration groups. Every time a new loop is found and counted into the configuration group, the corresponding configuration group counter is increased by 1.

[0082] Specifically, the protection device circuit of a 220kV double-mother wiring line is as follows:

[0083]

[0084] Table 1 Protection device circuit of 220kV double-mother wiring line

[0085] Replace the attribute code of IED and standardize the virtual terminal to obtain the corresponding circuit template 6_5_1_1 as shown in the following table:

[0086] IED1 Virtual terminal 1 type IED2 Virtual terminal 2 6_5_1_1 Trip circuit breaker phase A GOOSE Output 6_5_1_4 Jump to A1

[0087] Table 2 6_5_1_1 Standard circuit

[0088] The above process standardizes the virtual terminal 1 "trip switch phase A" of the actual IED and converts it into "trip circuit breaker phase A".

[0089] Divide the steps according to specific categories and list the specific implementation contents:

[0090] In an SCD file, there are two line intervals in the 220kV double-bus connection, with a double configuration, and a total of four line protections. The loop connections are extracted separately. The connection conditions described in Table 1 are as follows:

[0091]

[0092] Table 3 Actual connection

[0093] The extracted standard circuit is as follows:

[0094] IED1 Virtual terminal 1 type IED2 Virtual terminal 2 6_5_1_1 Trip circuit breaker phase A GOOSE Output 6_5_1_4 Jump to A1 6_5_1_1 Trip circuit breaker phase A GOOSE Output 6_5_1_4 Jump to A1 6_5_1_1 Trip circuit breaker phase A GOOSE Output 6_5_1_4 Jump to A1 6_5_1_1 Trip circuit breaker phase A GOOSE Output 6_5_1_4 Jump to A2

[0095] Table 4 Standard circuit

[0096] We obtained three loop configurations shown in Table 2 and one new loop configuration, which are classified as follows:

[0097] The first group of circuits: 6_5_1_1 trips the A phase of the circuit breaker, GOOSE outputs 6_5_1_4, trips A1;

[0098] The second group of circuits: 6_5_1_1 trips the A phase of the circuit breaker, GOOSE output 6_5_1_4 trips A2.

[0099] The corresponding counting situation is: 3 loops in the first group, 1 loop in the second group.

[0100] Furthermore, the standard loop includes a to-be-validated standard loop, a pre-validated loop, and a validated standard loop that are sequentially formed before forming the final standard loop library.

[0101] Furthermore, the standard loop to be effective refers to the loop relationship described by the standard virtual terminal extracted from any SCD file.

[0102] It should be noted that a virtual terminal in an SCD file is identified and converted into a standard virtual terminal, and the virtual circuit subscription relationship is described by attribute coding and the standard virtual terminal, wherein the standard circuit to be effective is the circuit relationship described by the standard virtual terminal extracted from any SCD file.

[0103] Furthermore, the pre-validated loop refers to counting the virtual loops that can be classified into a configuration group and are discovered in the past, and setting a counting threshold.

[0104] It should be noted that when the counted number is greater than the counting threshold, the corresponding loop is marked as a pre-validation loop.

[0105] Furthermore, the effective standard loop refers to the corresponding standard loop to be effective when the pre-effective loop exists in the standard loop to be effective.

[0106] It should be noted that the standard circuit library includes all valid standard circuits, that is, the collection of all valid standard circuits forms the standard circuit library.

[0107] It should be noted that the markings of the pre-validation circuit include:

[0108] The number threshold is a configurable item, and there are two reasonable value setting methods: the first is absolute value setting, and the second is historical similar project ratio setting;

[0109] When the absolute value setting is adopted, a constant C is set, and the virtual circuits of the same type that have been configured more than C times in the history of the configuration group are marked as pre-effective circuits;

[0110] When adopting the historical similar project ratio setting, set a ratio coefficient p, record the number of similar virtual circuit configurations found in the configuration group as X, and record the number of similar virtual circuit configuration conditions found in the configuration group as Y. Calculate p ～ =X / Y, when p ～ When it is greater than p, the corresponding virtual circuit configuration found is marked as a pre-validated circuit.

[0111] Among them, the same virtual circuit configuration condition refers to the matching of the attribute identifiers of the actual sending IED and the receiving IED with the attribute identifiers of the sending IED and the receiving IED of the statistical circuit object. At this time, there may be a virtual circuit configuration that is the same as the same configuration discovered historically, or there may not be a virtual circuit configuration that is the same as the same configuration discovered historically.

[0112] The value of the constant C mentioned above is combined with the sample size setting, and the recommended value of the proportion p is 0.85-0.95. The larger the C value and the p value are, the more difficult it is to obtain the pre-validation loop, and accordingly, the higher the accuracy of the final standard virtual loop is.

[0113] If C is 2, the first group of loops in Table 4 will be marked as pre-effective loops, and the second group of loops will not be marked as pre-effective loops. When p is 0.9, the p values ​​corresponding to the first and second groups of loops are ～ If the calculated result is not greater than 0.9, it will not be marked as a pre-validation loop. ～ When the calculated result is greater than 0.9, the corresponding circuit will be marked as a pre-effective circuit.

[0114] If C is 0, the second group of loops in Table 4 are marked as pre-effective loops, but since the to-be-effective standard loops cannot be found in Table 2, the corresponding loops will not be marked as effective standard loops.

[0115] When the pre-effective circuit cannot find the corresponding standard circuit to be effective in the standard circuit library to be effective, the virtual circuit configuration of the IED in an SCD file is identified and extracted again, and the standard circuit to be effective is formed by identifying the circuit of the new SCD to complete the expansion of the standard circuit to be effective.

[0116] In summary, the present invention reduces the need for manual configuration and improves the reliability of verification by establishing and maintaining a standard virtual circuit library for smart substations. Through autonomous learning, the accuracy and consistency of virtual circuit configuration are ensured, the risk of configuration errors is reduced, and the digitalization and automation level of operation and maintenance of smart substations is improved through automated circuit library management, thereby improving the overall operation and maintenance efficiency. The method can adapt to the differences in different regions, periods and ICD models, enhance the versatility and flexibility of the circuit library, and through continuous learning and updating, the standard circuit library can be continuously optimized to adapt to new configuration requirements and technical standards.

[0117] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible without substantially departing from the novel teachings and advantages of the subject matter described in the application (e.g., mounting arrangements, use of materials, color, changes in orientation, etc.). For example, the element shown as integrally formed may be composed of a plurality of parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "bracket plus function" clause is intended to cover the structure of the execution function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to a variety of modifications that still fall within the scope of the appended claims.

[0118] Additionally, in an effort to provide a concise description of example embodiments, all features of an actual implementation may not be described.

[0119] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, the development effort will be a routine task of design, fabrication, and production without undue experimentation.

[0120] 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 method for autonomously learning a standard circuit library for a smart substation, characterized in that: include, Establish standard IED and virtual terminal models to provide standardized descriptions for components and connections in smart substations; Preprocess the SCD file to match the standard IED model; Extract and standardize the virtual circuit configuration of IED from SCD files using standard virtual terminal model; Summarize all standardized circuit configurations to form a library of circuits to be effective, and record the frequency of occurrence by category; Pre-validate frequently occurring virtual circuit configurations; Compare the pre-effective circuit with the template in the standard circuit library to be effective, and confirm that the consistent circuit is the effective standard circuit; Extract the final standard circuit from the effective standard circuit to build a complete standard circuit library; Update and improve the standard circuit library by continuously learning new SCD files.

2. The method for autonomously learning the standard circuit library of a smart substation according to claim 1, characterized in that: The standard IED model includes standard naming, GOOSE sending standard virtual terminals, GOOSE receiving standard virtual terminals, SV sending standard virtual terminals, and SV receiving standard virtual terminals.

3. The autonomous learning method of the standard circuit library of the smart substation as described in claim 2 is verified and characterized in that: the standard naming uses a set of coding attributes to describe the standard IED model object, and the specific coding attributes include voltage level, wiring type, interval type, and equipment type.

4. The method for autonomously learning the standard circuit library of a smart substation according to any one of claims 2 or 3, characterized in that: The standard virtual terminal identification model includes defining a matching relationship algorithm for virtual terminals, taking the standard virtual terminals as the first type of virtual terminals, taking the actual virtual terminals of the IED in the engineering SCD file as the second type of virtual terminals, comparing the keyword combinations in the first type of virtual terminals and the second type of virtual terminals, and determining whether the standard virtual terminals and the actual virtual terminals are compatible based on the comparison results.

5. The method for autonomously learning the standard circuit library of a smart substation according to claim 4, characterized in that: The preprocessing of the SCD file includes extracting the attribute information of the IED based on the IED naming information, assigning the coding attributes of the standard naming corresponding to the standard IED model to the IED in the SCD file, and obtaining the relationship between each IED and the standard IED model.

6. The method for autonomously learning the standard circuit library of a smart substation according to claim 5, characterized in that: The identification classification of the standard circuit library includes virtual circuit configuration identification, configuration item classification, and configuration group counting.

7. The method for autonomously learning the standard circuit library of a smart substation according to claim 6, characterized in that: The standard loops include a to-be-validated standard loop, a pre-validated loop, and a validated standard loop, which are sequentially formed before forming a final standard loop library.

8. The method for autonomously learning the standard circuit library of a smart substation according to claim 7, characterized in that: The standard loop to be effective refers to the loop relationship described by the standard virtual terminal extracted from any SCD file.

9. The method for autonomously learning the standard circuit library of a smart substation according to claim 7, characterized in that: The pre-validated loop refers to counting the virtual loops that are historically discovered and can be classified into a configuration group, and setting a counting threshold.

10. The method for autonomously learning the standard circuit library of a smart substation according to claim 7, characterized in that: The effective standard loop refers to the corresponding standard loop to be effective when the pre-effective loop exists in the standard loop to be effective.

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