Transformer substation transformation and debugging method based on CRC incidence matrix and weighted decision

Abstract

The invention discloses a CRC (Cyclic Redundancy Check) incidence matrix and weighted decision-making transformer substation transformation debugging method. The method comprises the following steps: analyzing an SCD (Substation Configuration Description) file and generating a cross-interval CRC incidence matrix; identifying the changed IED and determining a debugging object and a debugging range; constructing an accompanying stop rule base, collecting real-time operation state data of the transformer substation, calculating an accompanying stop necessity coefficient of each associated IED through a weighted decision algorithm, and generating a dynamic accompanying stop list; calling a pre-constructed standardized debugging template, and performing instantiation processing on the debugging template in combination with the determined debugging object, debugging and the generated dynamic accompanying stop list to generate a complete debugging scheme; according to the complete debugging scheme, the debugging process is executed automatically or in an auxiliary mode, and a structured debugging report is generated after debugging is completed. According to the invention, cross-interval change influence can be automatically and completely identified, a reasonable accompanying stop list is dynamically generated, and a standardized debugging scheme is output, so that the test integrity is improved, the power failure loss is reduced, and the debugging efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of power system secondary equipment commissioning technology, and more specifically, to a substation retrofitting and commissioning method based on CRC correlation matrix and weighted decision. Background Technology

[0002] Substation upgrades are a crucial step in ensuring the safe and stable operation of the power grid. With the widespread adoption of smart substations, their configuration description files (SCD files) define the complex logical relationships between all secondary equipment (IEDs) in the substation, especially the virtual loop connections across bays. During substation upgrades, any modification to the configuration of a single IED can be propagated through virtual loops to normally functioning equipment in other bays, triggering implicit changes.

[0003] The existing technology has many shortcomings: 1) Incomplete change identification: Traditional methods often only focus on directly modified IEDs, making it difficult to comprehensively and automatically identify IEDs with implicit changes affected by virtual loop associations, resulting in blind spots in the commissioning scope and leaving safety hazards; 2) Unreasonable backup shutdown scope: The determination of backup shutdown equipment relies heavily on manual experience and lacks quantitative basis, which can easily lead to an excessively large backup shutdown scope, increasing power outage losses, or an insufficient backup shutdown scope, affecting the safety of operating equipment during commissioning; 3) Low commissioning efficiency: Commissioning plans rely on manual preparation, the process lacks standardization, the workload is large, time-consuming, and prone to errors.

[0004] The patent with publication number CN119362690A, "An Automatic Verification Method and System for Virtual Circuits in the Renovation and Expansion of Intelligent Substations," establishes a standard terminal library and a tSCD library to calculate the minimum unit feature code of the IED to identify changes and verify virtual circuits. However, it does not construct a global correlation model, cannot capture IEDs with implicit changes, and has a limited verification range. The patent with publication number CN111274206B, "A Method for Determining the Testing Boundary of Substation Renovation and Expansion Based on the Minimum Sub-CRC Code," identifies IEDs and delineates the testing boundary through sub-CRC codes. However, it does not incorporate real-time operating status data, nor does it have a standardized design for shutdown optimization and debugging. It relies on manual operation and is inefficient.

[0005] Therefore, there is an urgent need for a method that can automatically identify the full scope of changes, intelligently optimize shutdown strategies, and standardize the commissioning process to improve the safety, economy, and efficiency of substation renovation work. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a substation modification and commissioning method based on CRC correlation matrix and weighted decision-making. This method can automatically and completely identify the impact of cross-bay changes, dynamically generate a reasonable list of backup shutdowns, and output a standardized commissioning plan, thereby improving test integrity, reducing power outage losses, and increasing commissioning efficiency.

[0007] The technical solution adopted in this invention is: A substation retrofit and commissioning method based on CRC correlation matrix and weighted decision-making includes: Parse the SCD file and generate a cross-interval sub-CRC correlation matrix; Based on the cross-interval sub-CRC correlation matrix, the modified IED is identified and the debugging object and debugging scope are determined; Construct a backup shutdown rule library that includes both hard and flexible rules, collect real-time operating status data of substations, calculate the backup shutdown necessity coefficient of each associated IED through a weighted decision algorithm, and generate a dynamic backup shutdown list; The pre-built standardized debugging template is invoked, and the debugging object and the generated dynamic stop list are combined to instantiate the debugging template and generate a complete debugging plan. The debugging process is executed automatically or assisted according to the complete debugging plan, and a structured debugging report is generated after the debugging is completed.

[0008] Further, the step of parsing the SCD file and generating a cross-interval sub-CRC correlation matrix includes: Obtain the SCD file before and after modification; The SCD files before and after the modification are parsed, and the virtual terminal configuration elements of each IED process layer in the SCD files before and after the modification are extracted; wherein, the configuration elements include virtual loop configuration information of SV transmission, GOOSE transmission, SV reception, and GOOSE reception signals. The configuration information of each virtual loop is treated as a string. Based on the Cyclic Redundancy Check (CRC) 32-bit algorithm, the sub-CRC value of each virtual loop in the SCD file before and after the modification is calculated. The sub-CRC value serves as a unique identifier for the corresponding virtual loop configuration. Based on the interval division information, IED device list, signal flow and connection relationship of virtual loops between IEDs in the SCD file, and the calculated CRC value of each virtual loop, a three-level associated topology model of interval-IED-virtual loop is constructed. Based on the three-level association topology model of interval-IED-virtual loop, a cross-interval sub-CRC association matrix is ​​generated.

[0009] Furthermore, the step of identifying changed IEDs and determining the debugging target and debugging scope based on the cross-interval sub-CRC correlation matrix includes: By comparing the sub-CRC values ​​of each virtual loop in the SCD file before and after the modification, the IED that underwent the initial configuration change is identified, i.e., the main change IED. By traversing the cross-interval sub-CRC correlation matrix, the implicitly modified IEDs are identified; Based on the primary change IED and the implicit change IED, a list of primary change IED and implicit change IED is formed to determine the debugging objects and debugging scope.

[0010] Furthermore, the process of traversing the cross-interval sub-CRC correlation matrix to identify the latent change IED specifically involves: Starting with the primary modified IED, the cross-interval sub-CRC association matrix is ​​traversed using either a depth-first search algorithm or a breadth-first search algorithm. The sub-CRC values ​​of all associated IEDs before and after the modification are then verified one by one. If there is a difference between the sub-CRC value of a certain associated IED before and after the modification, then the associated IED is determined to be an implicitly modified IED affected by the main modified IED. Otherwise, the associated IED is determined to be an unchanged IED.

[0011] Furthermore, a shutdown rule base containing both hard and flexible rules is constructed. Real-time operating status data of substations is collected, and a weighted decision algorithm is used to calculate the shutdown necessity coefficient of each associated IED, generating a dynamic shutdown list, specifically: Construct a shutdown rule library that includes both hard and flexible rules. The hard rules define that equipment with critical safety associations to the main change IED must be shut down to ensure personal and equipment safety. The flexible rules define that equipment with only sampling signal associations to the main change IED and with redundant sampling channels should be dynamically decided based on the real-time operating status data of the substation. The real-time operating status data of the substation is obtained through the substation monitoring and data acquisition system, namely the SCADA system and the online monitoring system, including the real-time load rate of each associated IED, equipment health status and standby channel status. Based on the list of IEDs with major changes and IEDs with implicit changes, the necessity coefficient of accompanying shutdown for each associated IED is calculated by a weighted decision algorithm. Based on the calculated necessity coefficients of each associated IED for shutdown, the equipment is classified into different levels; By integrating the mandatory parking equipment according to rigid rules with the parking results of weighted decision-making, a dynamic parking list is formed that includes equipment name and parking level.

[0012] Furthermore, the formula for calculating the necessity coefficient of the accompanying stop is as follows:

[0013] In the formula, C is the necessity coefficient for accompanying the stop, and its value ranges from [0, 1]. S represents the sub-CRC association strength, which is derived from the cross-interval sub-CRC association matrix. The value range is [0, 1]. The larger the value, the stronger the association between the device and the main change IED. L is the real-time load rate (%), obtained through the substation SCADA system, and its value ranges from [0, 1]. H represents the device health status, which is obtained through an online monitoring system. The value range is [0, 1], where 1 indicates that the device is fully available and 0 indicates that the device is unavailable. It supports refined interval scoring. Ch represents the status of the backup channel, which is obtained through the online monitoring system. The value of 1 indicates that the backup channel is available, and the value of 0 indicates that the backup channel is unavailable. The calculated necessity coefficients for the accompanying shutdown of each associated IED are used to classify the equipment into three levels, as follows: ①C≥0.7: Stop the game if necessary; ② 0.4 ≤ C < 0.7: It is recommended to stop the train / train. ③C<0.4: No need to stop.

[0014] Furthermore, a pre-built standardized debugging template is invoked, and combined with the determined debugging object, the debugging process, and the generated dynamic stop list, the debugging template is instantiated to generate a complete debugging plan, specifically as follows: Based on the different commissioning objects and test steps of substation renovation and commissioning, a standardized commissioning template for substation renovation and commissioning is pre-constructed; the standardized commissioning template covers the commissioning process and test standards for different types of IEDs, wherein each type of IED has corresponding test items, test methods and pass / fail criteria. Based on the determined debugging objects and scope and the generated dynamic list of accompanying shutdown equipment, the standardized debugging template is instantiated to obtain a complete substation modification and debugging plan that includes the corresponding debugging items, test contents, safety measures and accompanying shutdown requirements.

[0015] Furthermore, the debugging report may include several or all of the following: ① Basic information of the commissioning project: Clarify the background information of the commissioning project, including the project name, implementation time, modification objectives and responsible unit; ② Debugging Objects and Scope Details: Define the list of main change IEDs and implicit change IEDs involved in this debugging, as well as the specific debugging boundaries; ③ Dynamic Accompanying Stop List and Implementation Status: Record the actual implementation status of equipment that must be accompanied and recommended for accompanying stop; ④ Data recording during debugging: Record in detail the operation steps, test parameters, equipment response data and abnormal situations of each stage of debugging, so as to provide original data support for the verification of debugging results and troubleshooting; ⑤ Evaluation of commissioning results and suggestions for rectification: comprehensively evaluate whether the commissioning project meets the preset technical standards and safety requirements, and propose specific rectification measures for items that do not meet the standards or potential risks.

[0016] Another technical solution adopted by the present invention is: A substation retrofit and commissioning system based on CRC correlation matrix and weighted decision-making includes: The SCD parsing and sub-CRC correlation matrix module is used to parse SCD files and generate cross-interval sub-CRC correlation matrices. The IED change identification module is used to identify changed IEDs and determine the debugging object and debugging scope based on the cross-interval sub-CRC correlation matrix; The shutdown decision module is used to build a shutdown rule library that includes both hard and flexible rules, collect real-time operating status data of substations, calculate the shutdown necessity coefficient of each associated IED through a weighted decision algorithm, and generate a dynamic shutdown list. The debugging scheme generation module is used to call a pre-built standardized debugging template, combine the determined debugging object and debugging, and the generated dynamic stop list to instantiate the debugging template and generate a complete debugging scheme. The debug execution and reporting module is used to automatically or assistedly execute the debug process according to the complete debug plan, and generate a structured debug report after the debug is completed.

[0017] Compared with the prior art, the present invention has the following advantages: This invention constructs a cross-interval CRC correlation matrix and uses a depth-first or breadth-first search algorithm to identify hidden changes, ensuring that the debugging scope covers all affected IEDs, improving test integrity, and eliminating safety hazards. It introduces a weighted decision model based on multi-dimensional real-time operating status data to optimize the backup shutdown strategy, making backup shutdown decisions intelligent and quantitative rather than experience-based, effectively avoiding problems of excessive or insufficient backup shutdown scope, reducing power outage losses, and lowering the economic losses caused by power outages. Through standardized modeling and scheme instantiation, it automates and standardizes the debugging process, improving debugging efficiency and standardization, reducing manual intervention, and improving work efficiency and quality consistency. It is applicable to the construction, expansion, and renovation of various smart substations, possessing good versatility and promotional value. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a flowchart illustrating a substation modification and commissioning method based on CRC correlation matrix and weighted decision-making according to the present invention. Figure 2 This is a schematic diagram illustrating the principle of determining the dynamic accompaniment list in this invention; Figure 3 This is a schematic diagram of a substation renovation and commissioning system based on CRC correlation matrix and weighted decision-making according to the present invention. Detailed Implementation

[0019] Example 1

[0020] like Figures 1 to 2 As shown, a substation modification and commissioning method based on CRC correlation matrix and weighted decision includes: S1. Parse the SCD file and generate a cross-interval sub-CRC correlation matrix; Specifically, 1) Obtain the SCD file before and after the modification; 2) Parse the SCD file before and after the modification, and extract the virtual terminal configuration elements of each IED process layer in the SCD file before and after the modification; wherein, the configuration elements include virtual loop configuration information of SV transmission, GOOSE transmission, SV reception, and GOOSE reception signals. 3) Treat the configuration information of each virtual loop as a string, and calculate the sub-CRC value of each virtual loop in the SCD file before and after the modification based on the Cyclic Redundancy Check (CRC) 32-bit algorithm. The sub-CRC value serves as a unique identifier for the corresponding virtual loop configuration. 4) Based on the interval division information, IED device list, signal flow and connection relationship of virtual loops between IEDs in the SCD file, and the calculated CRC value of each virtual loop, a three-level associated topology model of interval-IED-virtual loop is constructed. 5) Based on the aforementioned three-level association topology model of interval-IED-virtual loop, a cross-interval sub-CRC association matrix is ​​generated; S2. Based on the cross-interval sub-CRC correlation matrix, identify the changed IED and determine the debugging object and debugging scope; Specifically, 1) By comparing the sub-CRC values ​​of each virtual loop in the SCD file before and after the modification, the IED that has undergone initial configuration changes, i.e., the main change IED, can be identified; 2) Traverse the cross-interval sub-CRC correlation matrix to identify the latently modified IED: Starting with the primary modified IED, the cross-interval sub-CRC association matrix is ​​traversed using either a depth-first search algorithm or a breadth-first search algorithm. The sub-CRC values ​​of all associated IEDs before and after the modification are then verified one by one. If there is a difference between the sub-CRC value of a certain associated IED before and after the modification, then the associated IED is determined to be an implicitly modified IED affected by the main modified IED. Otherwise, the associated IED is determined to be an unchanged IED; 3) Based on the main change IED and the implicit change IED, form a list of main change IED and implicit change IED to determine the debugging objects and debugging scope; S3. Construct a backup shutdown rule library that includes both hard and flexible rules, collect real-time operating status data of substations, calculate the backup shutdown necessity coefficient of each associated IED through a weighted decision algorithm, and generate a dynamic backup shutdown list. Specifically, 1) Construct a shutdown rule library that includes hard rules and flexible rules; wherein, the hard rules are defined as equipment that has a direct tripping circuit and closing circuit with the main change IED and other key safety-related equipment must be shut down to ensure personal and equipment safety; the flexible rules are defined as equipment that only has a sampling signal association with the main change IED and has redundant sampling channels, and whether to shut down is dynamically decided based on the real-time operating status data of the substation. 2) Obtain real-time substation operating status data, including the real-time load rate, equipment health status, and standby channel status of each associated IED, through the substation monitoring and data acquisition system, namely the SCADA system and the online monitoring system; 3) Based on the list of IEDs with major changes and IEDs with implicit changes, the necessity coefficient of accompanying shutdown for each associated IED is calculated by a weighted decision algorithm; 4) Based on the calculated necessity coefficients for each associated IED to be shut down, the equipment is classified into different levels; 5) Integrate the mandatory parking equipment according to rigid rules with the parking results of weighted decision-making to form a dynamic parking list that includes equipment name and parking level; The formula for calculating the necessity coefficient of accompanying parking is as follows:

[0021] In the formula, C is the necessity coefficient for accompanying the stop, and its value ranges from [0, 1]. S represents the sub-CRC association strength, which is derived from the cross-interval sub-CRC association matrix. The value range is [0, 1]. The larger the value, the stronger the association between the device and the main change IED. L is the real-time load rate (%), obtained through the substation SCADA system, and its value ranges from [0, 1]. H represents the device health status, which is obtained through an online monitoring system. The value range is [0, 1], where 1 indicates that the device is fully available and 0 indicates that the device is unavailable. It supports refined interval scoring. Ch represents the status of the backup channel, which is obtained through the online monitoring system. The value of 1 indicates that the backup channel is available, and the value of 0 indicates that the backup channel is unavailable. The calculated necessity coefficients for the accompanying shutdown of each associated IED are used to classify the equipment into three levels, as follows: ①C≥0.7: Stop the game if necessary; ② 0.4 ≤ C < 0.7: It is recommended to stop the train / train. ③C<0.4: No need to stop; S4. Call the pre-built standardized debugging template, combine the determined debugging object and debugging, and the generated dynamic stop list to instantiate the debugging template and generate a complete debugging plan. Specifically, 1) Based on the different commissioning objects and test steps of substation renovation and commissioning, a standardized commissioning template for substation renovation and commissioning is pre-constructed; the standardized commissioning template covers the commissioning process and test standards for different types of IEDs, wherein each type of IED has corresponding test items, test methods and pass / fail criteria. 2) Based on the determined debugging objects and scope and the generated list of dynamic backup equipment, the standardized debugging template is instantiated to obtain a complete substation modification and debugging plan that includes the corresponding debugging items, test contents, safety measures and backup requirements.

[0022] S5. Automatically or assistedly execute the debugging process according to the complete debugging plan, and generate a structured debugging report after the debugging is completed; The debugging report may include, specifically, one or more of the following contents: ① Basic information of the commissioning project: Clarify the background information of the commissioning project, including the project name, implementation time, modification objectives and responsible unit; ② Debugging Objects and Scope Details: Define the list of main change IEDs and implicit change IEDs involved in this debugging, as well as the specific debugging boundaries; ③ Dynamic shutdown list and execution status: Record the actual execution status of equipment that must be shut down and those that are recommended to be shut down, such as whether there is a power outage and the duration of the power outage; ④ Data recording during debugging: Record in detail the operation steps, test parameters, equipment response data and abnormal situations of each stage of debugging, so as to provide original data support for the verification of debugging results and troubleshooting; ⑤ Evaluation of commissioning results and suggestions for rectification: comprehensively evaluate whether the commissioning project meets the preset technical standards and safety requirements, and propose specific rectification measures for items that do not meet the standards or potential risks.

[0023] Example 2

[0024] like Figure 3 As shown, a substation retrofit and commissioning system based on CRC correlation matrix and weighted decision-making includes: SCD parsing and sub-CRC correlation matrix module 601 is used to parse SCD files and generate cross-interval sub-CRC correlation matrices; The IED identification module 602 is used to identify the modified IED and determine the debugging object and debugging scope based on the cross-interval sub-CRC correlation matrix. The shutdown decision module 603 is used to build a shutdown rule library containing both hard and flexible rules, collect real-time operating status data of substations, calculate the shutdown necessity coefficient of each associated IED through a weighted decision algorithm, and generate a dynamic shutdown list. The debugging scheme generation module 604 is used to call a pre-built standardized debugging template, combine the determined debugging object and the debugging and the generated dynamic stop list, instantiate the debugging template, and generate a complete debugging scheme. The debug execution and reporting module 605 is used to automatically or assistedly execute the debug process according to the complete debug plan and generate a structured debug report after the debug is completed.

[0025] In practical implementation, the SCD parsing and sub-CRC association matrix module first obtains the SCD files before and after the modification, and extracts the virtual terminal configuration elements of each IED process layer through parsing, including the virtual loop configuration information of SV transmission, GOOSE transmission, SV reception, and GOOSE reception signals. Then, the configuration information of each virtual loop is converted into a string, and the sub-CRC value of each virtual loop is calculated using the CRC-32 bit algorithm as a unique identifier for its configuration. Based on bay division information, IED equipment list, virtual loop signal flow and connection relationship, and sub-CRC values, a three-level correlation topology model of bay-IED-virtual loop is constructed, thereby generating a cross-bay sub-CRC correlation matrix. The changed IED identification module identifies the main changed IED by comparing the sub-CRC values ​​before and after the modification, and uses a depth-first or breadth-first search algorithm to traverse the cross-bay sub-CRC correlation matrix to identify the implicit changed IED, forming a list of main changed IEDs and implicit changed IEDs, clarifying the debugging objects and scope. The shutdown decision module is responsible for constructing a shutdown rule base containing hard and flexible rules, and collecting real-time operating status data of the substation through the SCADA system and online monitoring system, including real-time load rate, equipment health status, and standby channel status. Based on the list of IEDs undergoing major and implicit changes, a weighted decision algorithm is used to calculate the necessity coefficient of each associated IED for accompanying shutdown. Equipment is categorized into three levels: mandatory shutdown, recommended shutdown, and optional shutdown, generating a dynamic shutdown list. The commissioning plan generation module instantiates a pre-built standardized commissioning template based on the determined commissioning objects and scope and the dynamic shutdown list, generating a complete substation modification and commissioning plan that includes corresponding commissioning items, test content, safety measures, and shutdown requirements. Finally, the commissioning execution and reporting module automatically or assistedly executes the commissioning process according to the complete commissioning plan, records commissioning process data, evaluates commissioning results, proposes rectification suggestions, and generates a structured commissioning report. This series of processes ensures that the complete scope of changes is identified, shutdown strategies are intelligently optimized, and the commissioning process is standardized during substation modification and commissioning, achieving comprehensiveness, safety, and efficiency in substation modification and commissioning work.

[0026] To further verify the practicality and superiority of the substation renovation and commissioning method combining CRC correlation matrix and weighted decision-making, the following describes the implementation process of this method in detail, taking the renovation of the protection IED of line 3 of a 110kV substation as an example.

[0027] The protection IED (model: PCS-9611) for line 3 of this substation needs to be upgraded due to outdated software. After the upgrade, the associated IEDs need to be debugged to ensure the safe operation of the power grid. The specific implementation steps are as follows: S1. Parse the SCD file and generate a cross-interval sub-CRC correlation matrix: S11. Analyze the SCD files before (V1.0) and after (V2.0) the modification, extract the process layer virtual terminal configuration of line protection No. 3 (PL1103A) and associated IED (bus protection (PM1112A) and merging unit No. 3 (ML1103A)), and extract a total of 28 virtual circuits (including 3 tripping circuits, 15 sampling circuits and 10 alarm circuits). S12. Calculate the CRC value of each virtual loop. For example, before the upgrade, the CRC of the virtual loop 1 of the line tripping IED of line 3 was 0x12345678, and after the upgrade it is 0x87654321. S13. Construct the virtual loop topology of line bay 3 - merging unit 3 - bus protection, and generate the cross-bay sub-CRC correlation matrix, some of which are shown in the table below:

[0028] S2. Based on the cross-interval sub-CRC correlation matrix, identify the changed IED and determine the debugging object and debugging scope: S21. Compare the sub-CRC values ​​of each virtual circuit before and after the modification, and screen out the IEDs whose sub-CRC values ​​have changed. After comparison, the sub-CRC values ​​of 12 virtual circuits of the No. 3 line protection IED have changed, and the sub-CRC values ​​of 3 virtual circuits of the No. 3 merging unit have changed due to the modification of the sampling channel. These two devices are determined to be the main modified IEDs. S22. Starting with the main changed IED (Line 3 protection, Unit 3 merging) as the starting node, a depth-first search algorithm is used to traverse the cross-interval sub-CRC correlation matrix and verify the sub-CRC values ​​of all associated IEDs one by one: When traversing the associated nodes of Line 3 protection IED, it is found that there is a difference in the branch 1_protection trip virtual circuit of the bus protection IED (the sub-CRC value changes from 0x3456789A to 0x9876543B), which is determined to be an implicitly changed IED; when traversing the associated nodes of Unit 3 merging, the sub-CRC values ​​of all virtual circuits of Unit 3 merging are unchanged, thus eliminating the implicit change; S23. The final list of main change IEDs and related change IEDs is formed: the main change IEDs are line protection IED No. 3 and merging unit No. 3; the related change IEDs are bus protection IEDs.

[0029] S3. Construct a shutdown rule base containing both hard and flexible rules, collect real-time operating status data of substations, calculate the shutdown necessity coefficient of each associated IED through a weighted decision algorithm, and generate a dynamic shutdown list: S31. Matching of accompanying shutdown rules: The bus protection IED and the No. 3 line protection IED have a direct tripping association, which meets the hard rule and must be accompanied shutdown; the No. 3 merging unit and the No. 3 line protection IED have a sampling association and have No. 3 merging unit B as a redundant channel, which meets the flexible rule and requires dynamic decision-making. S32. Real-time data acquisition: Obtain real-time operating status data of Unit 3 through the SCADA system: real-time load rate 65%, equipment health status 0.95, and the status of the backup channel (Unit 3 B) is normal.

[0030] S33: Weighted calculation: Necessity coefficient for accompanying shutdown = 0.9 (sub-CRC association strength) × 0.4 + 0.65 (real-time load rate) × 0.3 + 0.95 (equipment health status) × 0.2 + 1 (standby channel status) × 0.1 = 0.24 + 0.195 + 0.19 + 0.1 = 0.845; S34. Stop-at-home order determination: 0.845 > 0.7, determined as mandatory stop-at-home order; S35, Dynamic Stop List: Busbar Protection IED (mandatory stop), Unit 3 (mandatory stop).

[0031] S4: Invoke the pre-built standardized debugging template, combine the determined debugging object and debugging, and the generated dynamic stop list to instantiate the debugging template and generate a complete debugging plan: The pre-built standardized debugging model library is invoked to match corresponding test templates for three types of debugging objects: line protection modification, merging unit shutdown, and bus protection shutdown. Line protection device No. 3 is a main modification IED, which requires GOOSE input / output test, SV input / output test, individual unit test, and line protection bay group transmission test. Bus protection is a shutdown IED, which requires bus protection group transmission test, GOOSE input / output test, and SV input / output test for the modified bay. Merging unit No. 3 is a shutdown IED, which requires SV input / output test of the merging unit to the modified line protection device. According to the test items required for each IED, the corresponding test items in the test template are selected, unnecessary test items are removed, and the template test parameters defined by the general identifier in the template are replaced according to the actual parameters of the IED to complete the instantiation of the debugging scheme.

[0032] Step S6: Automatically or assistedly execute the debugging process according to the complete debugging plan, and generate a structured debugging report after debugging is completed; Based on the complete commissioning plan generated in step S5, the automatic commissioning system is used to execute the specific commissioning tasks. The commissioning system adopts an automatic execution and manual verification mode to advance the commissioning process. According to the safety requirements in the commissioning plan, it is confirmed that the accompanying equipment (bus protection IED, No. 3 merging unit) has completed the de-energization operation and the "Equipment commissioning in progress, do not close" sign is displayed. It is checked that the test power supply connection of the No. 3 line protection IED is normal and that the physical isolation from the operating equipment is in place. The commissioning tasks are executed according to the steps in the commissioning plan for each object. During the commissioning process, the commissioning system automatically records the test process data and verification results. After the commissioning is completed, the system automatically generates a structured commissioning report, which is manually reviewed by the commissioning personnel and approved by the substation operation and maintenance personnel to complete the commissioning work.

[0033] In the aforementioned modification scenario, the method of this invention not only solves the pain points of incomplete identification of traditional debugging changes, unreasonable scope of backup shutdown, and low efficiency, but also achieves the goals of zero safety risk, minimal power outage losses, and high-efficiency debugging, fully verifying the practicality and superiority of the technical solution.

[0034] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the principles and essence of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A substation retrofitting and commissioning method based on CRC correlation matrix and weighted decision-making, characterized in that, include: Parse the SCD file and generate a cross-interval sub-CRC correlation matrix; Based on the cross-interval sub-CRC correlation matrix, the modified IED is identified and the debugging object and debugging scope are determined; Construct a backup shutdown rule library that includes both hard and flexible rules, collect real-time operating status data of substations, calculate the backup shutdown necessity coefficient of each associated IED through a weighted decision algorithm, and generate a dynamic backup shutdown list; The pre-built standardized debugging template is invoked, and the debugging object and the generated dynamic stop list are combined to instantiate the debugging template and generate a complete debugging plan. The debugging process is executed automatically or assisted according to the complete debugging plan, and a structured debugging report is generated after the debugging is completed.

2. The substation modification and commissioning method based on CRC correlation matrix and weighted decision-making according to claim 1, characterized in that, The process of parsing the SCD file and generating a cross-interval sub-CRC correlation matrix includes: Obtain the SCD file before and after modification; The SCD files before and after the modification are parsed, and the virtual terminal configuration elements of each IED process layer in the SCD files before and after the modification are extracted; wherein, the configuration elements include virtual loop configuration information of SV transmission, GOOSE transmission, SV reception, and GOOSE reception signals. The configuration information of each virtual loop is treated as a string. Based on the Cyclic Redundancy Check (CRC) 32-bit algorithm, the sub-CRC value of each virtual loop in the SCD file before and after the modification is calculated. The sub-CRC value serves as a unique identifier for the corresponding virtual loop configuration. Based on the interval division information, IED device list, signal flow and connection relationship of virtual loops between IEDs in the SCD file, and the calculated CRC value of each virtual loop, a three-level associated topology model of interval-IED-virtual loop is constructed. Based on the three-level association topology model of interval-IED-virtual loop, a cross-interval sub-CRC association matrix is ​​generated.

3. The substation modification and commissioning method based on CRC correlation matrix and weighted decision-making according to claim 1, characterized in that, The method of identifying changed IEDs and determining the debugging objects and scope based on the cross-interval sub-CRC correlation matrix includes: By comparing the sub-CRC values ​​of each virtual loop in the SCD file before and after the modification, the IED that underwent the initial configuration change is identified, i.e., the main change IED. By traversing the cross-interval sub-CRC correlation matrix, the implicitly modified IEDs are identified; Based on the primary change IED and the implicit change IED, a list of primary change IED and implicit change IED is formed to determine the debugging objects and debugging scope.

4. The substation modification and commissioning method based on CRC correlation matrix and weighted decision-making according to claim 3, characterized in that, The process of traversing the cross-interval sub-CRC association matrix to identify the latent change IED is as follows: Starting with the primary modified IED, the cross-interval sub-CRC association matrix is ​​traversed using either a depth-first search algorithm or a breadth-first search algorithm. The sub-CRC values ​​of all associated IEDs before and after the modification are then verified one by one. If there is a difference between the sub-CRC value of a certain associated IED before and after the modification, then the associated IED is determined to be an implicitly modified IED affected by the main modified IED. Otherwise, the associated IED is determined to be an unchanged IED.

5. The substation modification and commissioning method based on CRC correlation matrix and weighted decision-making according to claim 1, characterized in that, A shutdown rule base containing both hard and flexible rules is constructed. Real-time operating status data of substations is collected, and a weighted decision algorithm is used to calculate the shutdown necessity coefficient of each associated IED, generating a dynamic shutdown list, specifically: Construct a shutdown rule library that includes both hard and flexible rules. The hard rules define that equipment with critical safety associations to the main change IED must be shut down to ensure personal and equipment safety. The flexible rules define that equipment with only sampling signal associations to the main change IED and with redundant sampling channels should be dynamically decided based on the real-time operating status data of the substation. The real-time operating status data of the substation is obtained through the substation monitoring and data acquisition system, namely the SCADA system and the online monitoring system, including the real-time load rate of each associated IED, equipment health status and standby channel status. Based on the list of IEDs with major changes and IEDs with implicit changes, the necessity coefficient of accompanying shutdown for each associated IED is calculated by a weighted decision algorithm. Based on the calculated necessity coefficients of each associated IED for shutdown, the equipment is classified into different levels; By integrating the mandatory parking equipment according to rigid rules with the parking results of weighted decision-making, a dynamic parking list is formed that includes equipment name and parking level.

6. The substation modification and commissioning method based on CRC correlation matrix and weighted decision-making according to claim 5, characterized in that, The formula for calculating the necessity coefficient of accompanying parking is as follows: In the formula, C is the necessity coefficient for accompanying the stop, and its value ranges from [0, 1]. S represents the sub-CRC association strength, which is derived from the cross-interval sub-CRC association matrix. The value range is [0, 1]. The larger the value, the stronger the association between the device and the main change IED. L is the real-time load rate (%), obtained through the substation SCADA system, and its value ranges from [0, 1]. H represents the device health status, which is obtained through an online monitoring system. The value range is [0, 1], where 1 indicates that the device is fully available and 0 indicates that the device is unavailable. It supports refined interval scoring. Ch represents the status of the backup channel, which is obtained through the online monitoring system. The value of 1 indicates that the backup channel is available, and the value of 0 indicates that the backup channel is unavailable. The calculated necessity coefficients for the accompanying shutdown of each associated IED are used to classify the equipment into three levels, as follows: ①C≥0.7: Stop the game if necessary; ② 0.4 ≤ C < 0.7: It is recommended to stop the train / train. ③C<0.4: No need to stop.

7. The substation modification and commissioning method based on CRC correlation matrix and weighted decision-making according to claim 1, characterized in that, The pre-built standardized debugging template is invoked, and combined with the determined debugging object, the debugging process, and the generated dynamic stop list, the debugging template is instantiated to generate a complete debugging plan, specifically: Based on the different commissioning objects and test steps of substation renovation and commissioning, a standardized commissioning template for substation renovation and commissioning is pre-constructed; the standardized commissioning template covers the commissioning process and test standards for different types of IEDs, wherein each type of IED has corresponding test items, test methods and pass / fail criteria. Based on the determined debugging objects and scope and the generated dynamic list of accompanying shutdown equipment, the standardized debugging template is instantiated to obtain a complete substation modification and debugging plan that includes the corresponding debugging items, test contents, safety measures and accompanying shutdown requirements.

8. The substation modification and commissioning method based on CRC correlation matrix and weighted decision-making according to claim 1, characterized in that, The debug report may include, specifically, one or more of the following contents: ① Basic information of the commissioning project: Clarify the background information of the commissioning project, including the project name, implementation time, modification objectives and responsible unit; ② Debugging Objects and Scope Details: Define the list of main change IEDs and implicit change IEDs involved in this debugging, as well as the specific debugging boundaries; ③ Dynamic Accompanying Stop List and Implementation Status: Record the actual implementation status of equipment that must be accompanied and recommended for accompanying stop; ④ Data recording during debugging: Record in detail the operation steps, test parameters, equipment response data and abnormal situations of each stage of debugging, so as to provide original data support for the verification of debugging results and troubleshooting; ⑤ Evaluation of commissioning results and suggestions for rectification: comprehensively evaluate whether the commissioning project meets the preset technical standards and safety requirements, and propose specific rectification measures for items that do not meet the standards or potential risks.

9. A substation retrofit and commissioning system based on CRC correlation matrix and weighted decision-making, characterized in that, include: The SCD parsing and sub-CRC correlation matrix module is used to parse SCD files and generate cross-interval sub-CRC correlation matrices. The IED change identification module is used to identify changed IEDs and determine the debugging object and debugging scope based on the cross-interval sub-CRC correlation matrix; The shutdown decision module is used to build a shutdown rule library that includes both hard and flexible rules, collect real-time operating status data of substations, calculate the shutdown necessity coefficient of each associated IED through a weighted decision algorithm, and generate a dynamic shutdown list. The debugging scheme generation module is used to call a pre-built standardized debugging template, combine the determined debugging object and debugging, and the generated dynamic stop list to instantiate the debugging template and generate a complete debugging scheme. The debug execution and reporting module is used to automatically or assistedly execute the debug process according to the complete debug plan, and generate a structured debug report after the debug is completed.

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