Method for verifying secondary circuit model of transformer substation

Abstract

The invention discloses a method for verifying a secondary circuit model of a transformer substation, and the method comprises the following steps: obtaining a to-be-verified secondary circuit model, and obtaining a model library containing a typical secondary circuit; matching a secondary loop model to be verified with any typical model in the model library; and on the basis of the matching result, performing sequence verification, position verification, terminal internal wiring verification, terminal external wiring verification, terminal inter-cabinet wiring verification and pressing plate verification on the terminal segments of the terminal strip, and forming a verification result.

Description

Technical Field

[0001] The present invention relates to the technical field of model verification, and in particular to a secondary circuit model verification method for a transformer substation. Background Art

[0002] At present, the power system is developing towards intelligence, networking and automation, which puts forward higher requirements for the secondary circuit design of substations. As the nerve center of the substation automation system, the accuracy and reliability of the secondary circuit design are directly related to the safe and stable operation of the power system. However, with the expansion of substation scale and the increase of complexity, the design and verification of secondary circuits have become more and more complicated and cumbersome. Traditional manual verification methods can no longer meet the requirements of modern power systems for efficiency, accuracy and comprehensiveness.

[0003] The traditional secondary circuit design verification method mainly relies on manual review of drawings and on-site verification. This method has many limitations:

[0004] 1) Low efficiency: Manual review of drawings takes a lot of time and manpower, and is easily limited by the experience and skill level of the reviewers; 2) Error-prone: Due to the complexity and diversity of the drawings, manual review is prone to missing design details and potential defects; 3) Lack of intuitiveness: Traditional verification methods lack intuitive visual comparison methods and it is difficult to intuitively display design differences and defects; 4) Difficult to fully cover: Manual review often finds it difficult to fully cover all design details, especially for the design of large substations and complex secondary circuits, it is even more difficult to achieve no omissions.

[0005] In summary, in the existing substation construction or renovation and expansion projects, the review of secondary equipment drawings is completely dependent on manual work, which has problems such as low efficiency and high personnel level requirements. If negligence occurs during the personnel review process, design defects may not be discovered in time, resulting in equipment running with defects, endangering the safety of the power grid. Therefore, it is urgent to build a secondary system model automatic verification support module to carry out online automatic verification of secondary equipment drawings, so as to promptly discover design defects in the drawings during the infrastructure stage, eliminate hidden dangers in equipment operation, and prevent secondary system mines. Summary of the invention

[0006] In view of the above-mentioned prior art, the present invention provides a secondary circuit model verification method for a substation, mainly to solve the technical problems existing in the above-mentioned background technology.

[0007] To achieve the above object, the technical solution of the embodiment of the present invention is implemented as follows:

[0008] A secondary circuit model verification method for a substation, the verification method comprising the following steps:

[0009] Obtaining a secondary circuit model to be verified, and obtaining a model library containing typical secondary circuits;

[0010] Matching the secondary circuit model to be verified with any typical model in the model library;

[0011] Based on the matching results, the terminal block terminal segment sequence verification, position verification, terminal internal wiring verification, terminal external wiring verification, terminal cabinet wiring verification and pressure plate verification are performed respectively, and the verification results are formed.

[0012] Optionally, the terminal segment name or the pressure plate name on the secondary circuit model to be verified is extracted, and a search is performed in the model library based on the terminal segment name or the pressure plate name. If a typical model with a corresponding terminal segment name and a corresponding pressure plate name is found, the typical model is used as the ideal model of the secondary circuit model to be verified. If not found, the terminal segment name and the pressure plate name are matched with the corresponding name and the pressure plate name of any typical model in the model library by cosine similarity, and the typical model with a high degree of match is selected as the ideal model of the secondary circuit model to be verified.

[0013] Optionally, the secondary circuit model to be verified is verified against the ideal model in terms of terminal block terminal segment sequence verification, position verification, terminal internal wiring verification, terminal external wiring verification, terminal cabinet wiring verification, and pressure plate verification.

[0014] Optionally, find terminal segments with the same horizontal coordinates in the secondary circuit model to be verified, take the smallest repeated value of the horizontal coordinates, and determine it as the left terminal row; take the largest repeated value of the horizontal coordinates, and determine it as the right terminal row. In the remaining terminal segments, the terminal row part with the same vertical coordinates is determined as a horizontal terminal row. The matching terminal segments in the entire left terminal row, the right terminal row, and the horizontal terminal row are sorted and compared with the terminal segments in the ideal model to determine whether the sequence of the terminal segments in the secondary circuit model to be verified conforms to the sequence of the terminal segments in the ideal model.

[0015] Optionally, the secondary circuit model to be verified and the internal wiring in the ideal model are analyzed to determine whether there is an internal wiring in the secondary circuit model to be verified that is consistent with the ideal model.

[0016] Optionally, the secondary circuit model to be verified and the external wiring in the ideal model are analyzed to determine whether there is an external wiring in the secondary circuit model to be verified that is consistent with the ideal model.

[0017] Optionally, the secondary circuit model to be verified and the terminal block cabinet wiring in the ideal model are analyzed, and based on the circuit number, it is determined whether there is a terminal block cabinet wiring in the secondary circuit model to be verified that is consistent with the ideal model.

[0018] Optionally, the pressure plate in the secondary circuit model to be verified is verified with that in the ideal model through number verification, name verification, color verification and position verification.

[0019] The beneficial effects of the present invention are: the difference between the newly created model and the typical model can be intuitively seen, through automated matching and similarity algorithms, and secondly, the method can quickly process the name information of a large number of terminal segments and pressure plates, significantly reducing the time and workload of manual review, reducing human intervention, and reducing errors caused by negligence or lack of experience, ensuring the consistency and reliability of the verification results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a flow chart of a secondary circuit model verification method of a substation in an embodiment of the present application. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further elaborated in detail below in conjunction with the drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. In the following description, the expression "some embodiments" is related to a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0022] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0023] It should be understood that the present invention can be implemented in different forms and should not be interpreted as being limited to the embodiments proposed herein. On the contrary, providing these embodiments will make the disclosure thorough and complete, and the scope of the present invention will be fully conveyed to those skilled in the art. And the purpose of the terms used herein is only to describe specific embodiments and is not intended to be a limitation of the present invention. When used herein, the singular forms of "one", "one" and "said / the" are also intended to include plural forms, unless the context clearly indicates another way. It should also be understood that the terms "compose" and / or "include" when used in this specification determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0024] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "inside", "outside", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0025] In order to fully understand the present invention, a detailed structure will be proposed in the following description to illustrate the technical solution proposed by the present invention. The optional embodiments of the present invention are described in detail as follows, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0026] In the process of substation design and construction, it is crucial to accurately and efficiently verify the drawings of new substations or new bays. To this end, the visual comparison and verification method of modeled drawings and typical bay template models has become an innovative and effective solution. The implementation basis of this method is to build a comprehensive substation typical bay template model library, covering all aspects of substation design, so as to ensure the consistency and accuracy between the new design and the standard template.

[0027] The bay of a substation is a basic unit in the power system, and it is classified according to different types and characteristics. Common bay types include line bay, high-voltage reactor bay, main transformer bay, bus bay, etc. Each bay carries a specific function and role. For example, the line bay is used to connect the transmission line, while the main transformer bay is connected to the main transformer of the substation. In addition, there are station transformer bays, grounding transformer bays, etc., which are crucial to the stable operation and safety of substations.

[0028] The voltage level of the bay is also an important basis for classification. Different voltage levels represent different transmission capabilities and application scenarios. From the 750kV ultra-high voltage bay to the 10kV low voltage bay, each level has its own unique design specifications and technical requirements. When designing a substation, it is necessary to select appropriate equipment and protection measures according to the voltage level to ensure the efficiency and safety of the system.

[0029] The choice of busbar connection method also directly affects the reliability and flexibility of the substation. From single busbar to complex extended external bridge connection, each connection method has its specific advantages and usage scenarios. For example, the single busbar system has a simple structure but poor flexibility; while the double busbar system has higher reliability and can still ensure power supply when a problem occurs on one busbar.

[0030] The application of special devices, such as low-frequency and low-voltage load reduction devices, standby automatic switching devices and stabilization devices, is the embodiment of the intelligence and automation of modern substations. They can automatically adjust the operating status to ensure the stability of the power grid when the system load changes or a fault occurs.

[0031] In terms of circuit transfer, the typical circuit templates of substations cover all aspects of DC and AC systems. DC power circuit diagrams, AC voltage circuit diagrams, etc. represent different functions and circuit structures. Input circuit connection diagrams and output circuit connection diagrams show the connection methods of control and protection devices. Communication timing circuit connection diagrams and printed circuit connection diagrams are important parts of modern substations interacting with external communication and recording equipment.

[0032] In the process of constructing the typical bay design template of the substation, the typical bay templates of different types and voltage levels must first be classified and sorted to ensure the correctness and completeness of each template. Then, according to the actual design requirements, the corresponding templates are selected for comparison and verification to ensure the correctness of the digital handover. Therefore, the current review of substation drawings is usually based on manual visual review, which is very inconvenient.

[0033] Please refer to the attached Figure 1 , the present application provides a secondary circuit model verification method for a substation, which can convert the substation drawings provided by the design institute and other units into a secondary circuit model, and compare and verify the converted model with the model in the pre-set typical secondary circuit model library. In this set typical secondary circuit model library, each circuit should be presented in a standardized form, including its function, structure and connection method. Designers can use visualization tools to intuitively compare the differences between typical circuit templates and newly built designs, so as to make precise adjustments and optimizations. The left terminal block in the currently generated secondary circuit model to be verified is as follows:

[0034]

[0035]

[0036]

[0037] The verification method disclosed therein comprises the following steps:

[0038] S1. Obtain a secondary circuit model to be verified, and obtain a model library containing typical secondary circuits, wherein the secondary circuit model to be verified is obtained by a drawing modeling method based on model building, or by a drawing modeling method based on CAD drawing recognition. Both methods can model the drawings issued by the design institute to obtain the secondary circuit model to be verified, and the model library containing typical secondary circuits is a pre-established model library;

[0039] S2, matching the secondary circuit model to be verified with any typical model in the model library;

[0040] S3. Based on the matching results, the terminal block terminal segment sequence verification, position verification, terminal internal wiring verification, terminal external wiring verification, terminal cabinet wiring verification and pressure plate verification are respectively performed to form a verification result.

[0041] In one embodiment, the terminal segment name or the pressure plate name on the secondary circuit model to be verified is extracted, and based on the terminal segment name or the pressure plate name, a search is performed in the model library. If a typical model with a corresponding terminal segment name and a corresponding pressure plate name is found, the typical model is used as the ideal model of the secondary circuit model to be verified. If not found, the terminal segment name and the pressure plate name are matched with the corresponding name and the pressure plate name of any typical model in the model library by cosine similarity, and the typical model with a high degree of matching is selected as the ideal model of the secondary circuit model to be verified.

[0042] By extracting key identifiers on the model to be verified, such as the terminal segment name or the pressure plate name, these identifiers are important elements with specific functions and positions in the secondary circuit. By accurately matching these identifiers, typical models with the same or similar features can be quickly located in the model library. This direct matching method is suitable for most standardized designs, and can quickly narrow the search scope and improve the verification speed.

[0043] In addition, before performing a name search, the names of the secondary circuit models to be verified are processed similarly. Different design institutes, manufacturers or projects may have different naming habits. For example, some design institutes may use "ZD" to represent the DC power supply terminal segment, while others may use "DC". Through similar processing, these different naming methods can be unified to ensure that they are regarded as the same terminal segment during comparison. The results of similar processing can be referred to as follows:

[0044] A. ZD = nZD (n, approximate processing);

[0045] B. QD = nQD = nQmD (n≠4, n, approximate processing, m, non-approximate processing);

[0046] C. n-4QD=4QmD (n, approximate treatment, m, non-approximate treatment);

[0047] D, CD = nCD = nCmD (n, approximate processing, m, non-approximate processing);

[0048] E. KD = nKD = nKmD (n, approximate treatment, m, non-approximate treatment);

[0049] F, UD = nUD = nUmD (n, approximate processing, m, non-approximate processing);

[0050] G, ID = n ID = n I mD (n, approximate processing, m, non-approximate processing);

[0051] H, XD = nXD (XD, 1XD, 1-1XD) (n, approximate processing);

[0052] I. YD = nYD (YD, 1YD, 1-1YD) (n, approximate processing);

[0053] J, LD = nLD (LD, 1LD, 1-1LD) (n, approximate treatment);

[0054] K, TD = nTD (TD, 1TD, 1-1TD) (n, approximate processing);

[0055] L, JD = nJD (JD, 1JD, 1-1JD) (n, approximate processing);

[0056] M, BD = nBD (BD, 1BD, 1-1BD) (n, approximate treatment);

[0057] In one embodiment, the secondary circuit model to be verified is verified against the ideal model through terminal block terminal segment sequence verification, position verification, terminal internal wiring verification, terminal external wiring verification, terminal cabinet wiring verification, and pressure plate verification.

[0058] For sequence verification and position verification, read the cabinet width cube-width from the secondary circuit model to be verified. If not, take 800 by default, find out the terminal segments with the same horizontal coordinates, consider the horizontal error caused by the misalignment between the terminals, take the minimum repeated value of the horizontal coordinate, with an error of 1% and less than 10% width, and determine it as the left terminal row; take the maximum repeated value of the horizontal coordinate, with an error of 1% and greater than 80% width, and determine it as the right terminal row. In the remaining terminal segments, the terminal row parts with the same vertical coordinates with an error of 1% are determined as a horizontal terminal row.

[0059] Sort and compare the matching terminal segments in the entire left terminal row, right terminal row, and horizontal terminal row. The overall idea of ​​sequential comparison is: based on the sequence of terminal segments in the ideal model, determine the sequence of terminal segments in the model. For example, determine that 1 is before 2\3\4\5\6: number of errors A, error object set A`.

[0060] Judgment 2 is after 1 and before 3\4\5\6: number of errors B, set of error objects B`.

[0061] Judgment 3 is after 1\2 and before 4\5\6: number of errors C, error object set C.

[0062] Judgment 4 is after 1\2\3 and before 5\6: number of errors D, set of error objects D.

[0063] Judge that 5 is after 1\2\3\4 and before 6: number of errors E, set of error objects E.

[0064] Judge that 6 is after 1\2\3\4\5: number of errors F, set of error objects F`;

[0065] There are a total of n numerical errors in 123456. For the set of n error objects, take the error object with the largest number of occurrences m (there can be multiple) and name it set X. In the 1-2-3-4-5-6 judgments, after removing set X, are the remaining error object sets only set X? If yes, the error object is set X; if not, recursively loop and take the error objects with the largest and second largest occurrences from the set of n error objects and name them X.

[0066] In one embodiment, the secondary circuit model to be verified and the internal wiring in the ideal model are analyzed to determine whether there is an internal wiring in the secondary circuit model to be verified that is consistent with the ideal model.

[0067] Specifically, for terminal internal wiring verification, the internal wiring of the model terminal block is analyzed, and the internal wiring columns and external wiring columns of all short-circuited terminals of the corresponding terminal block in the ideal model are fuzzy matched, and DeviceName-SubdeviceName-Pi nName are matched accordingly. If a match is found, it is determined that the internal wiring is consistent with the ideal model, and it cannot be matched again after matching;

[0068] ④ If the model has it but the ideal model does not, it is judged as: "excessive internal wiring";

[0069] ⑤ If the model does not have it and the ideal model does, it is judged as: "Internal wiring is missing";

[0070] ⑥ If the model has it and the ideal model has it, and the wiring is inconsistent, it will be judged as: "Internal wiring error".

[0071] In one embodiment, for terminal external wiring verification, the secondary circuit model to be verified and the external wiring in the ideal model are analyzed to determine whether there is an external wiring in the secondary circuit model to be verified that is consistent with the ideal model.

[0072] Specifically, DeviceName-SubdeviceName-Pi nName is matched accordingly. If a match is found, it is determined that the external wiring is consistent with the ideal model, and it cannot be matched again after matching.

[0073] ④ If the model has it but the ideal model does not, it is judged as: "external wiring is redundant";

[0074] ⑤ If the model does not have it and the ideal model does, it is judged as: "External wiring is missing";

[0075] ⑥ If the model has it, the ideal model has it, and the wiring is inconsistent, it is judged as: "External wiring error"

[0076] In an optional implementation, the secondary circuit model to be verified and the terminal cabinet wiring in the ideal model are analyzed, and based on the circuit number, it is determined whether there is a terminal cabinet wiring in the secondary circuit model to be verified that is consistent with the ideal model.

[0077] Specifically, the inter-cabinet wiring of the terminal block of the parsed model is fuzzily matched with the circuit number list of all short-circuit terminals of the corresponding terminal block in the ideal model, and the circuit numbers are matched accordingly. If a match is found, it is determined that the inter-cabinet wiring is consistent with the ideal model, and it cannot be matched again after matching;

[0078] ④ If the model has it but the ideal model does not, it is judged as: "Redundant wiring between cabinets";

[0079] ⑤ If the model does not exist but the ideal model does, it is judged as: "Inter-cabinet wiring is missing";

[0080] ⑥ If the model and the ideal model exist, and the wiring is inconsistent, it will be judged as: "Inter-panel wiring error".

[0081] In an optional implementation, the pressure plate in the secondary circuit model to be verified is verified with that in the ideal model through number verification, name verification, color verification, and position verification.

[0082] Specifically, in the platen matching, read the class = Link's device-name of the part corresponding to PartTemplate under the design in the model, ② read the number (composed of numbers and characters) in the ideal model platen layout workbook, and match the platen name in the model with the platen number in the workbook:

[0083] 1) Perform 100% identical matching of numbers;

[0084] 2) Number fuzzy matching: (the platen description is brought in for auxiliary judgment during matching);

[0085] The judgment of a complete match of the pressure plate is that the pressure plate number verification is normal, and the judgment of a successful fuzzy match of the pressure plate is "pressure plate number verification error"; the judgment of the model having a pressure plate and the ideal model not having a pressure plate is "redundant pressure plate"; the judgment of the model not having a pressure plate and the ideal model having a pressure plate is "missing pressure plate"; the unmatched pressure plate will not be subject to subsequent pressure plate verification.

[0086] For the platen that has been fully matched and fuzzy matched successfully, the platen number is read from the model, and the platen color is found by analogy based on the platen number. The identifier of the platen color is as follows:

[0087] 1) Red: nTLPn, nHLPn, nCLPn, nYLPn, nSLPn;

[0088] 2) Yellow: nFLPn, nKLPn, nQLPn, nRLPn;

[0089] 3) Gray: nBYn, nBLPn;

[0090] 4) Gray: nLPn;

[0091] Read the color of the platen number frame from the ideal model, and perform color verification on the platens that are completely matched and fuzzy matched. If the platen colors are the same, the color verification is normal; if the platen colors are different, the color verification is wrong.

[0092] During the platen position verification process, for all platen devices: the platen rows with repeated vertical coordinates are judged as the same horizontal row. Under the same horizontal coordinate, the number of the platen horizontal row is determined according to the vertical coordinate of the platen; the vertical coordinates are arranged in order from small to large, and the one with the smallest horizontal coordinate in the same horizontal row is on the left.

[0093] The platen order, number of platen rows, and number of platen columns are read from the ideal model.

[0094] Read the pressure plate that has been fully matched and fuzzy matched successfully, and perform a position check on the pressure plate rows and columns. If the position file and the ideal model rows and columns are consistent, the position check is correct; if the rows and columns are inconsistent, the position check is incorrect.

[0095] After completing the model verification and comparison, the comparison differences are displayed in a visual way.

[0096] (1) When comparing the intervals and secondary devices for consistency, the tree structure on the left shows whether the cabinets and secondary devices are missing.

[0097] (2) When comparing whether the functional circuit of the secondary equipment exists, check whether the functional circuit is missing by checking the functional circuit display of the device.

[0098] (3) When comparing the functional circuits and terminals of secondary equipment for consistency, first check the functional circuits of the device to see which functional circuits are inconsistent.

[0099] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. The protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A secondary circuit model verification method for a substation, characterized in that: The verification method comprises the following steps: Obtaining a secondary circuit model to be verified, and obtaining a model library containing typical secondary circuits; Matching the secondary circuit model to be verified with any typical model in the model library; Based on the matching results, the terminal block terminal segment sequence verification, position verification, terminal internal wiring verification, terminal external wiring verification, terminal cabinet wiring verification and pressure plate verification are performed respectively, and the verification results are formed.

2. A secondary circuit model verification method for a substation according to claim 1, characterized in that: Extract the terminal segment name or the pressure plate name on the secondary circuit model to be verified, and search in the model library based on the terminal segment name or the pressure plate name. If a typical model with a corresponding terminal segment name and a corresponding pressure plate name is found, the typical model is used as the ideal model of the secondary circuit model to be verified. If not found, perform cosine similarity matching between the terminal segment name and the pressure plate name and the corresponding name and pressure plate name of any typical model in the model library, and select the typical model with a high matching degree as the ideal model of the secondary circuit model to be verified.

3. A secondary circuit model verification method for a substation according to claim 2, characterized in that: The secondary circuit model to be verified is verified with the ideal model through terminal block terminal segment sequence verification, position verification, terminal internal wiring verification, terminal external wiring verification, terminal cabinet wiring verification and pressure plate verification.

4. A secondary circuit model verification method for a substation according to claim 3, characterized in that: In the secondary circuit model to be verified, find the terminal segments with the same horizontal coordinates, take the smallest repeated value of the horizontal coordinates, and determine it as the left terminal row; take the largest repeated value of the horizontal coordinates, and determine it as the right terminal row. In the remaining terminal segments, the terminal row part with the same vertical coordinates is determined as a horizontal terminal row. The matching terminal segments in the entire left terminal row, the right terminal row, and the horizontal terminal row are sorted and compared with the terminal segments in the ideal model to determine whether the sequence of the terminal segments in the secondary circuit model to be verified is consistent with the sequence of the terminal segments in the ideal model.

5. A secondary circuit model verification method for a substation according to claim 4, characterized in that: The secondary circuit model to be verified and the internal wiring in the ideal model are analyzed to determine whether there is an internal wiring in the secondary circuit model to be verified that is consistent with the ideal model.

6. A secondary circuit model verification method for a substation according to claim 1, characterized in that: The secondary circuit model to be verified and the external wiring in the ideal model are analyzed to determine whether there is an external wiring in the secondary circuit model to be verified that is consistent with the ideal model.

7. A secondary circuit model verification method for a substation according to claim 1, characterized in that: The secondary circuit model to be verified and the terminal cabinet wiring in the ideal model are analyzed, and based on the circuit number, it is determined whether there is a terminal cabinet wiring consistent with the ideal model in the secondary circuit model to be verified.

8. A secondary circuit model verification method for a substation according to claim 1, characterized in that: The pressure plate in the secondary circuit model to be verified is verified with that in the ideal model in terms of number, name, color and position.

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