Power distribution network protection setting value optimization method and device, electronic equipment and storage medium

Abstract

The invention provides a power distribution network protection setting value optimization method and device, electronic equipment and a storage medium, and the method comprises the steps: carrying out the analysis of the matching condition of a power distribution network based on equipment basic parameters, an initial protection setting value ledger and an operation mode, generating a protection setting value initial mismatch point ledger, carrying out the pre-calculation of a protection setting value, and carrying out the calculation of an initial mismatch point ledger; after a pre-calculation protection setting value ledger is generated, the matching condition is counted, and a setting calculation mismatching point and an event level thereof are determined; checking the setting calculation mismatch point and the protection setting value of the adjacent equipment, counting the checking result to form a checking mismatch point, recalculating the event level of the checking mismatch point, comparing the checked protection setting value with the initial protection setting value based on the calculation result, and adjusting the protection setting value according to the comparison result. The problem that a protection device acts inaccurately or is not timely due to the fact that an existing protection constant value cannot adapt to power grid operation state changes can be solved, and it is ensured that the protection constant value accurately reflects actual operation conditions of a power grid.

Description

Technical Field

[0001] The present application relates to the field of electric power technology, and in particular to a method, device, electronic device and storage medium for optimizing protection setting values ​​of a distribution network. Background Art

[0002] The stable operation of the power system is crucial to the economic development and daily life of modern society. In the power system, the distribution network is the key link between the main power grid and the end users. Its safety and reliability directly affect the quality and efficiency of power supply. County distribution networks, especially those located in remote areas, face more severe challenges due to their wide geographical distribution, complex structure and diverse equipment.

[0003] In existing technical practices, the calculation of protection settings for county distribution networks usually relies on a series of preset parameters and empirical formulas. These parameters and formulas are often based on idealized power grid models, while the actual operating status of the power grid may change significantly due to a variety of factors (such as load changes, equipment aging, environmental impacts, etc.). Therefore, the traditional protection setting calculation method may not accurately reflect the actual operating conditions of the power grid, resulting in inaccurate or untimely action of the protection device, which in turn affects the safe and stable operation of the power grid. In addition, the protection setting calculation of the county distribution network faces another challenge, that is, the setting calculation of the protection setting is usually only performed once. This single calculation method may cause the protection setting to not match the actual power grid operating status, increasing the risk of power grid operation.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the invention

[0005] In response to the above-mentioned technical problems, the present application provides a distribution network protection setting optimization method, device, electronic device and storage medium to solve the problem that the protection settings of the prior art cannot adapt to changes in the operating status of the power grid, resulting in inaccurate or untimely action of the protection device, ensure that the protection settings more accurately reflect the actual operating conditions of the power grid, reduce power grid accidents caused by improper setting of protection settings, and thus improve the safety and reliability of the power grid.

[0006] In order to solve the above technical problems, the present application provides a distribution network protection setting optimization method, comprising:

[0007] Establish equipment basic parameters and initial protection setting value records of the target distribution network, and obtain operation mode information of the target distribution network;

[0008] Based on the basic parameters of the equipment, the initial protection setting value ledger and the operation mode information, the initial protection setting value coordination of the target distribution network is analyzed to generate a protection setting value initial mismatch point ledger;

[0009] Pre-calculating the protection setting value of the target distribution network based on the protection setting value initial mismatch point ledger to generate a pre-calculated protection setting value ledger;

[0010] Based on the pre-calculated protection setting value ledger, statistics are collected on the coordination status of the target distribution network, a corresponding setting calculation mismatch point is generated, and an event level corresponding to the setting calculation mismatch point is calculated;

[0011] Verify the setting calculation mismatch point and its adjacent upper and lower level equipment protection settings to generate verification results;

[0012] The verification results are counted to form verification mismatch points, and the event levels corresponding to the verification mismatch points are recalculated to generate corresponding calculation results;

[0013] Based on the calculation result, the verified protection setting is compared with the initial protection setting, and the protection setting of the target distribution network is adjusted according to the comparison result.

[0014] Further, in some embodiments of the present application, the initial protection setting coordination of the target distribution network is analyzed based on the basic parameters of the equipment, the initial protection setting ledger and the operation mode information to generate a protection setting initial mismatch point ledger, including:

[0015] Based on the basic parameters of the equipment, the initial protection setting record and the operation mode information, simulate the action response of the protection device of the target distribution network under fault conditions to generate simulation results;

[0016] Based on the simulation results and the preset protection logic, identifying the initial mismatch point in the protection setting configuration corresponding to the target distribution network;

[0017] A protection constant initial mismatch point record is generated based on the initial mismatch point.

[0018] Further, in some embodiments of the present application, the pre-calculating the protection setting of the target distribution network based on the protection setting initial mismatch point ledger to generate the pre-calculated protection setting ledger includes:

[0019] Based on the protection setting value initial mismatch point ledger, adjusting the initial protection setting value of the target distribution network;

[0020] Use the setting calculation software to simulate the adjusted protection setting value and generate simulation calculation results;

[0021] Based on the simulation calculation results, a pre-calculated protection constant value ledger is generated.

[0022] Further, in some embodiments of the present application, the statistics of the coordination of the target distribution network based on the pre-calculated protection setting value ledger are performed to generate a corresponding setting calculation mismatch point, and the event level corresponding to the setting calculation mismatch point is calculated, including:

[0023] Based on the pre-calculated protection setting value ledger, statistics are collected on the coordination of each protection setting value, and corresponding setting calculation mismatch points are generated;

[0024] Calculate the event level corresponding to each mismatch point according to the power grid risk calculation formula;

[0025] The event level corresponding to the setting calculation mismatch point is evaluated, and a first evaluation result is generated and recorded.

[0026] Further, in some embodiments of the present application, the setting calculation mismatch point and its adjacent upper and lower level equipment protection setting values ​​are verified to generate verification results, including:

[0027] Obtaining a first evaluation result of an event level corresponding to the setting calculation mismatch point;

[0028] selecting a target tuning mismatch point based on the first evaluation result;

[0029] The target setting mismatch point and the equipment settings of the adjacent upper and lower levels are checked to generate a check result;

[0030] Based on the verification results, a protection setting verification mismatch point ledger is generated.

[0031] Further, in some embodiments of the present application, the verification results are counted to form verification mismatch points, and the event levels corresponding to the verification mismatch points are recalculated to generate corresponding calculation results, including:

[0032] Obtain the protection setting value verification mismatch point ledger corresponding to the verification result;

[0033] Based on the protection setting value verification mismatch point ledger, an adjusted protection setting value is determined;

[0034] Based on the adjusted protection setting and distribution network operation data, the event level corresponding to the setting calculation mismatch point is recalculated to generate a corresponding calculation result.

[0035] Further, in some embodiments of the present application, comparing the verified protection setting value with the initial protection setting value based on the calculation result, and adjusting the protection setting value of the target distribution network according to the comparison result, includes:

[0036] Based on the calculation result, the calibrated protection setting value is compared with the initial protection setting value to obtain a comparison result;

[0037] Based on the comparison result, an event level change evaluation is performed on the setting mismatch point to obtain a second evaluation result;

[0038] Based on the second evaluation result, generating protection setting value optimization suggestions;

[0039] The protection setting of the target distribution network is adjusted based on the protection setting optimization suggestion.

[0040] Accordingly, the present application also provides a distribution network protection setting optimization device, comprising:

[0041] The acquisition module is used to establish the basic equipment parameters and initial protection setting value records of the target distribution network, and obtain the operation mode information of the target distribution network;

[0042] An analysis module, configured to analyze the coordination of the initial protection setting values ​​of the target distribution network based on the basic parameters of the equipment, the initial protection setting value ledger and the operation mode information, and generate a protection setting value initial mismatch point ledger;

[0043] A pre-calculation module, used to pre-calculate the protection setting of the target distribution network based on the protection setting initial mismatch point ledger, and generate a pre-calculated protection setting ledger;

[0044] A statistical module, used to collect statistics on the coordination of the target distribution network based on the pre-calculated protection setting value ledger, generate corresponding setting calculation mismatch points, and calculate the event level corresponding to the setting calculation mismatch points;

[0045] A verification module is used to verify the setting calculation mismatch point and its adjacent upper and lower level equipment protection settings to generate a verification result;

[0046] A calculation module, used for performing statistics on the verification results to form verification mismatch points, and recalculating event levels corresponding to the verification mismatch points to generate corresponding calculation results;

[0047] A comparison module is used to compare the verified protection setting with the initial protection setting based on the calculation result, and adjust the protection setting of the target distribution network according to the comparison result.

[0048] The present application also provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the steps of the distribution network protection setting optimization method as described above when executing the program.

[0049] The present application also provides a storage medium storing a computer program that can be loaded by a processor and execute the distribution network protection setting optimization method as described above.

[0050] Implementing the embodiments of the present application has the following beneficial effects:

[0051] As described above, the present application provides a distribution network protection setting optimization method, device, electronic device and storage medium, the distribution network protection setting optimization method comprising: establishing equipment basic parameters and initial protection setting ledgers of the target distribution network, and obtaining operation mode information of the target distribution network; based on the equipment basic parameters, the initial protection setting ledger and the operation mode information, analyzing the initial protection setting coordination of the target distribution network, and generating a protection setting initial mismatch point ledger; pre-calculating the protection setting of the target distribution network based on the protection setting initial mismatch point ledger, and generating a pre-calculated protection setting ledger. Account; Based on the pre-calculated protection setting ledger, statistics are collected on the coordination of the target distribution network, the corresponding setting calculation mismatch point is generated, and the event level corresponding to the setting calculation mismatch point is calculated; the setting calculation mismatch point and its adjacent upper and lower level equipment protection setting are verified to generate verification results; the verification results are counted to form verification mismatch points, and the event level corresponding to the verification mismatch point is recalculated to generate corresponding calculation results; based on the calculation results, the verified protection setting is compared with the initial protection setting, and the protection setting of the target distribution network is adjusted according to the comparison results. The present application provides a distribution network protection setting optimization scheme, which ensures that the protection setting more accurately reflects the actual operating conditions of the power grid through an iterative optimization method, reduces power grid accidents caused by improper protection setting, and the optimized protection setting helps to quickly isolate the faulty part and reduce the impact on other parts of the power grid, thereby improving the safety and reliability of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0053] Figure 1 It is a flow chart of a distribution network protection setting value optimization method provided in an embodiment of the present application;

[0054] Figure 2 It is a structural schematic diagram of a distribution network protection setting optimization device provided in an embodiment of the present application;

[0055] Figure 3It is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0056] The realization of the purpose, functional features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. The above-mentioned drawings have shown clear embodiments of this application, which will be described in more detail later. These drawings and textual descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0057] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0058] It should be noted that, in this article, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element. In addition, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context of the specific embodiment.

[0059] It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0060] In the subsequent description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present application, and have no specific meanings. Therefore, "module", "component" or "unit" can be used in a mixed manner.

[0061] The electrical connection between the county distribution network and the main power grid is relatively weak. However, due to factors such as the configuration of the county distribution network relay protection, the system equivalence of the main power grid to the county distribution network, the protection setting limit, and the change in the operation mode of the county distribution network, it is usually difficult to calculate the setting value of the relay protection of the main equipment in the county distribution network. The power supply path of the county distribution network changes under different power supply conditions. The position of a specific device in the county distribution network in the power grid will change synchronously with the change of the power supply path, and its fault data will change synchronously, which may cause the setting calculation idea of ​​the device to be adjusted synchronously to better adapt to the operation mode of the device.

[0062] The most ideal state of regional power grid relay protection is that the relay protection settings are fully coordinated step by step. However, the relay protection devices of regional power grids of 110kV and below mainly rely on current protection and distance protection for coordination, and it is impossible to coordinate step by step. Therefore, it is necessary to fully consider the coordination of settings during the setting calculation to optimize the protection settings and minimize the operation risks of county distribution networks. The existing technology only performs one calculation according to the setting calculation steps, and the rationality of the protection setting selection is insufficiently evaluated.

[0063] In response to the above-mentioned technical problems, the embodiments of the present application provide a distribution network protection setting optimization method, device, electronic device and storage medium, which can solve the problem that the protection setting of the prior art cannot adapt to the changes in the operating status of the power grid, resulting in inaccurate or untimely action of the protection device, ensure that the protection setting more accurately reflects the actual operating conditions of the power grid, reduce power grid accidents caused by improper setting of protection setting, and thus improve the safety and reliability of the power grid.

[0064] See also Figure 1 , Figure 1 1 is a flow chart of a method for optimizing a distribution network protection setting value provided by an embodiment of the present application. A method for optimizing a distribution network protection setting value provided by this embodiment specifically includes the following steps:

[0065] S1. Establish the equipment basic parameters and initial protection setting value records of the target distribution network, and obtain the operation mode information of the target distribution network;

[0066] Specifically, for step S1, detailed information of all relevant equipment in the distribution network (such as the primary equipment of the distribution network) is mainly collected, including but not limited to the rated parameters and current protection settings of transformers, transmission lines, circuit breakers, etc.; the initial protection setting ledger can specifically include the manufacturer information, installation date, maintenance records, and specific setting values ​​of the protection device, such as the set current and time delay of the overcurrent protection. At the same time, collecting real-time or historical operating data of the distribution network, including load conditions, power supply paths, equipment status, etc., is crucial to understanding the dynamic behavior of the power grid, so as to determine the operating mode of the target distribution network based on the operating data.

[0067] S2. Based on the basic parameters of the equipment, the initial protection setting record and the operation mode information, the initial protection setting coordination of the target distribution network is analyzed to generate the protection setting initial mismatch point record;

[0068] Specifically, for step S2, the collected basic equipment parameters and operating mode information are used to analyze the coordination of protection settings under different operating conditions of the distribution network, so as to identify the initial mismatch point, and combine it with the initial protection setting ledger to generate the protection setting initial mismatch point ledger.

[0069] S3. Pre-calculate the protection setting of the target distribution network based on the protection setting initial mismatch point ledger to generate a pre-calculated protection setting ledger;

[0070] Specifically, for step S3, based on the initial mismatch point record, the protection setting value is adjusted, and the first round of comprehensive simulation calculation is performed through the setting calculation software to generate the first round of pre-calculated protection setting value record.

[0071] S4. Based on the pre-calculated protection setting value ledger, statistics are collected on the coordination of the target distribution network, the corresponding setting calculation mismatch point is generated, and the event level corresponding to the setting calculation mismatch point is calculated;

[0072] Specifically, for step S4, a statistical analysis is performed on the pre-calculated protection setting value ledger to generate setting calculation mismatch points, and the power grid risk calculation formula is used to evaluate the event level that may be caused by these mismatch points.

[0073] S5. Check the setting calculation mismatch point and its adjacent upper and lower level equipment protection settings and generate the check result;

[0074] Specifically, for step S5, a second round of verification is performed on the protection settings of the identified high-risk mismatch point and its adjacent equipment, verification results are generated, and the protection settings are further adjusted based on the verification results.

[0075] S6. Count the calibration results to form calibration mismatch points, and recalculate the event levels corresponding to the calibration mismatch points to generate corresponding calculation results;

[0076] Specifically, for step S6, the verification results are counted to form verification mismatch points, and the event levels corresponding to these mismatch points are recalculated to generate the final calculation result.

[0077] S7. Based on the calculation results, the verified protection setting is compared with the initial protection setting, and the protection setting of the target distribution network is adjusted according to the comparison results;

[0078] Specifically, for step S7, the protection setting after the second round of verification is compared with the initial protection setting, and the protection setting of the distribution network is finally adjusted according to the comparison result to achieve the optimal protection configuration.

[0079] It can be seen that the distribution network protection setting optimization method provided in this embodiment reduces the risk of false operation and missed operation by accurately adjusting the protection setting, thereby improving the overall safety of the distribution network; the optimized protection setting can respond to power grid faults more accurately, reduce power outages, and improve the reliability and continuous power supply capacity of the power grid; by quantitatively analyzing the event levels that may be caused by mismatch points, the risk of power grid operation is reduced, and accidents that may cause major power outages or equipment damage are prevented; maintenance and upgrade resources are more reasonably allocated, high-risk mismatch points are given priority, and the efficiency of maintenance work is improved; it can adapt to changes in the operating status of the power grid and dynamically adjust the protection setting to cope with factors such as changes in power grid load, equipment aging, and environmental changes.

[0080] Further, in some embodiments, step S2 "analyzing the coordination of the initial protection setting of the target distribution network based on the basic parameters of the equipment, the initial protection setting record and the operation mode information, and generating the protection setting initial mismatch point record" may specifically include:

[0081] S21. Based on the basic parameters of the equipment, the initial protection setting record and the operation mode information, simulate the action response of the protection device of the target distribution network under the fault condition and generate the simulation results;

[0082] S22. Based on the simulation results and the preset protection logic, identify the initial mismatch point in the protection setting configuration corresponding to the target distribution network;

[0083] S23. Generate a protection constant initial mismatch point ledger based on the initial mismatch point.

[0084] Specifically, for step S2, how to analyze the coordination of the initial protection setting of the distribution network and generate the initial mismatch point ledger of the protection setting is described in detail. First, the basic equipment parameters, initial protection setting ledger and operation mode information of the distribution network are used to simulate the action response of the protection device of the distribution network under different fault conditions through simulation software or calculation model. This step involves simulating various possible fault modes of the power grid, including but not limited to short circuit, overload, ground fault, etc., and the expected response of the protection device to these faults. Then, according to the simulation results and the preset protection logic, the action response of the actual protection device is compared with the expected response, and the initial mismatch point in the protection setting configuration is identified. The mismatch point may include situations such as the protection device response time is too long, the response is insufficient or the response is excessive, all of which may affect the safety and stability of the power grid. Finally, the identified initial mismatch point is recorded in detail in the protection setting initial mismatch point ledger, including the location, type, potential impact of the mismatch point and the difference between the expected protection action and the actual action. This ledger provides important basic data for the subsequent protection setting optimization and guides the subsequent pre-calculation and verification work.

[0085] Through simulation and analysis, this embodiment can more accurately identify problems in the protection setting, so as to make more precise adjustments; identifying and recording mismatch points helps to promptly discover and solve problems that may threaten the safety of the power grid, and reduce the risk of accidents caused by improper response of protection devices; through simulation and analysis, the response time and other parameters of the protection device can be optimized to ensure that it can act quickly and accurately when a real fault occurs; accurate mismatch point analysis helps to quickly locate the problem when a fault occurs, and improve the efficiency and effectiveness of fault handling; optimized protection setting can reduce the scope and duration of unnecessary power outages and improve the power supply reliability of the power grid.

[0086] Further, in some embodiments, step S3 "pre-calculating the protection setting of the target distribution network based on the protection setting initial mismatch point ledger to generate a pre-calculated protection setting ledger" may specifically include:

[0087] S31. Based on the initial mismatch point record of the protection setting, adjust the initial protection setting of the target distribution network;

[0088] S32. Perform simulation calculation on the adjusted protection setting value through setting calculation software to generate simulation calculation results;

[0089] S33. Based on the simulation calculation results, generate a pre-calculated protection constant value ledger.

[0090] Specifically, for step S3, a process of precalculating the protection setting of the distribution network based on the protection setting initial mismatch point ledger and generating the precalculated protection setting ledger is described. First, the initial protection setting of the relevant equipment in the distribution network is adjusted according to the information recorded in the protection setting initial mismatch point ledger. The adjustment may involve changing the setting value of the protection device, such as the setting current or time delay of the overcurrent protection, to better adapt to the actual operating conditions of the power grid. Then, the adjusted protection setting is simulated using professional setting calculation software. This step includes the input of the power grid model, including the topology of the power grid, equipment parameters and adjusted protection setting, as well as simulating the response of the protection device under various fault conditions. The software will calculate the action time and action sequence of the protection device under the new protection setting according to the input data and the preset algorithm, and generate the simulation calculation results. Based on the simulation calculation results, a precalculated protection setting ledger is generated. The ledger records the adjusted protection setting in detail, as well as the expected response of the protection device under these settings. The pre-calculated protection setting value ledger provides basic data for subsequent statistical analysis and further verification, and is a key document in the process of optimizing protection setting values.

[0091] Through adjustment and pre-calculation, the protection settings in this embodiment can better adapt to the actual operating conditions of the power grid and improve the response accuracy of the protection device; the optimized protection settings help to quickly and accurately isolate the faulty part when a fault occurs in the power grid, reduce the impact on other parts of the power grid, and improve the overall safety and stability of the power grid; accurate protection setting settings can reduce unnecessary power outages and improve the continuity and reliability of power supply; the pre-calculated protection setting ledger provides the expected response information of the protection device, which helps to quickly locate the problem and take corresponding measures when a fault occurs.

[0092] Further, in some embodiments, step S4 "based on the pre-calculated protection setting value ledger, statistics are collected on the coordination of the target distribution network, corresponding setting calculation mismatch points are generated, and the event level corresponding to the setting calculation mismatch points is calculated" may specifically include:

[0093] S41. Based on the pre-calculated protection setting value ledger, statistics on the coordination of each protection setting value are generated to generate the corresponding setting calculation mismatch point;

[0094] S42. Calculate the event level corresponding to each mismatch point according to the grid risk calculation formula;

[0095] S43. Evaluate the event level corresponding to the setting calculation mismatch point, generate a first evaluation result and record it.

[0096] Specifically, for step S4, first, the coordination of each protection setting in the distribution network is statistically analyzed in detail using the pre-calculated protection setting ledger. This includes checking whether the action time and action sequence of each protection device are coordinated, and whether the safe operation requirements of the power grid are met. Then, through statistical analysis, the coordination problems that still exist under the pre-calculated protection setting are identified, and the setting calculation mismatch points are generated. These mismatch points may indicate problems of uncoordinated action or improper response between protection devices. Next, for each setting calculation mismatch point, the power grid risk calculation formula is used to calculate the event level that may be caused. This step involves evaluating factors such as the scope of power grid failures that may be caused by the mismatch point, the number of affected users, and the degree of impact on key facilities. The calculation results of the event level help determine which mismatch points need to be prioritized and their potential impact on the safe operation of the power grid. Finally, the event level corresponding to the setting calculation mismatch point is evaluated, the first evaluation result is generated, and it is recorded. These records will provide an important reference for subsequent verification and optimization.

[0097] Through detailed statistical analysis and event level calculation, this embodiment can more accurately identify and evaluate risk points in power grid operation; clarifying the event level of mismatch points helps to prioritize the allocation of resources and attention to high-risk areas, and improve the efficiency of maintenance and upgrade work; timely identification and processing of high-risk mismatch points can reduce the possibility of power grid failures and enhance the overall security of the power grid; based on accurate risk assessment, more effective response strategies can be formulated to deal with possible power grid failures; by optimizing protection settings, unnecessary power outages caused by improper response of protection devices can be reduced, thereby reducing the impact on users.

[0098] Further, in some embodiments, step S5 "checking the setting calculation mismatch point and its adjacent upper and lower level equipment protection settings to generate a check result" may specifically include:

[0099] S51. Obtaining a first evaluation result of the event level corresponding to the setting calculation mismatch point;

[0100] S52. Selecting a target setting mismatch point based on the first evaluation result;

[0101] S53. Check the target setting mismatch point and its adjacent upper and lower level equipment settings to generate a check result;

[0102] S54. Based on the verification results, generate a record of protection setting verification mismatch points.

[0103] Specifically, for step S5, first, obtain the first evaluation result of the event level corresponding to the generated setting calculation mismatch point. These results provide quantitative information about the potential risk of each mismatch point. Based on the first evaluation result, select the target setting mismatch point that needs to be checked first. Usually, those mismatch points with higher event levels, that is, higher risks, are selected as targets. Then, the target setting mismatch point and its adjacent upper and lower level equipment settings are checked, including adjusting the set values ​​of the protection device to improve the coordination between the protection devices and reduce potential power grid risks. After the verification is completed, the verification results are generated, which reflect whether the adjusted protection setting can effectively solve the mismatch problem and reduce the corresponding event level. Finally, the verification results are recorded in detail in the protection setting verification mismatch point ledger. This ledger will be used to track the verification progress, record the effectiveness of the adjustment measures, and provide data support for subsequent optimization work.

[0104] This embodiment can more accurately control the risks in power grid operation and reduce hidden dangers that may lead to major power outages by verifying high-risk setting calculation mismatch points; verifying and adjusting protection settings helps to ensure that when a fault occurs, the protection device can operate in the correct order and time, thereby quickly isolating the faulty part and reducing the impact on power grid stability; the verification process can optimize the response time and action sequence of the protection device and improve its response accuracy and reliability; giving priority to high-risk mismatch points can more effectively utilize maintenance resources and improve the efficiency and effectiveness of maintenance work.

[0105] Further, in some embodiments, step S6 of "performing statistics on the verification results to form verification mismatch points, and recalculating event levels corresponding to the verification mismatch points to generate corresponding calculation results" may specifically include:

[0106] S61. Obtain the protection setting value verification mismatch point account corresponding to the verification result;

[0107] S62. Based on the protection setting value verification mismatch point ledger, determine the adjusted protection setting value;

[0108] S63. Based on the adjusted protection setting and distribution network operation data, recalculate the event level corresponding to the setting calculation mismatch point and generate the corresponding calculation result.

[0109] Specifically, for step S6, first obtain the verification results from the verification module, which are obtained after verifying the setting calculation mismatch point and its adjacent upper and lower level equipment protection settings. Based on the verification results, determine which mismatch points still have problems after verification, thereby forming a verification mismatch point list. This step helps to identify the protection settings that require further attention and adjustment. Then, for each verification mismatch point, determine the adjusted protection setting. This step involves further fine-tuning the set value of the protection device to ensure the safety and stability of the power grid. Then use the power grid risk calculation formula, combined with the adjusted protection setting and the operating data of the distribution network, to recalculate the event level corresponding to each verification mismatch point. This step helps to evaluate the effectiveness of the verification measures and determine whether further adjustments are needed. Finally, the recalculated event level and related verification information are organized into a calculation result report. This report will provide data support and decision-making basis for the final protection setting adjustment.

[0110] This embodiment can more accurately assess the risks in power grid operation and provide more reliable data support for decision-making by recalculating the event level of the verification mismatch point; adjusting the protection setting according to the verification result helps to optimize the response of the protection device and improve the safety and stability of the power grid; by accurately adjusting the protection setting, unnecessary power outages caused by improper response of the protection device can be reduced, and the continuity and reliability of power supply can be improved; by systematically analyzing and adjusting the protection setting, maintenance resources can be more effectively utilized and the efficiency and effectiveness of maintenance work can be improved. It can be seen that this method supports the continuous improvement of the distribution network protection system and adapts to changes in the operating status of the power grid through continuous data iteration and analysis.

[0111] Further, in some embodiments, step S7 "based on the calculation result, comparing the verified protection setting value with the initial protection setting value, and adjusting the protection setting value of the target distribution network according to the comparison result" may specifically include:

[0112] S71. Based on the calculation results, the calibrated protection setting value is compared with the initial protection setting value to obtain a comparison result;

[0113] S72. Based on the comparison result, the event level change evaluation is performed on the setting mismatch point to obtain a second evaluation result;

[0114] S73. Based on the second evaluation result, generate protection setting optimization suggestions;

[0115] S74. Adjust the protection setting of the target distribution network based on the protection setting optimization suggestion.

[0116] Specifically, for step S7, first, the calculation results generated by the calculation module are used to compare the difference between the verified protection setting and the initial protection setting. This step involves analyzing whether the change in the protection setting meets the predetermined safety and stability requirements. Based on the comparison results, the event level change of the setting mismatch point is evaluated. This includes analyzing whether the adjusted protection setting effectively reduces the event level and whether there is room for further optimization. Then, based on the results of the event level change evaluation, protection setting optimization suggestions are generated. These suggestions include fine-tuning the protection setting of a specific device, updating the set value of the protection device, or other necessary adjustment measures. Then, according to the protection setting optimization suggestions, the protection setting of the target distribution network is actually adjusted. This step ensures that the protection system of the distribution network can be optimized according to the latest data analysis results to improve the safety and efficiency of the system. Finally, the adjusted protection setting and all related optimization suggestions are recorded and archived for future reference. This helps to track the change history of the protection setting and provide data support for continuous optimization work.

[0117] This embodiment ensures that the protection settings more accurately match the actual operating conditions of the power grid through comparison and adjustment, thereby improving the response accuracy of the protection device; the optimized protection settings help to quickly and accurately isolate the faulty part when a fault occurs, reduce the impact on the stability of the power grid, and thus enhance overall safety; accurate protection setting reduces unnecessary power outages caused by improper response of the protection device, and improves the continuity and reliability of power supply; the systematic comparison and adjustment process improves the efficiency of maintenance and adjustment work, ensuring the most effective use of resources; the data and analysis results provided can help power grid operators make more scientific and reasonable decisions in power grid planning, equipment upgrades, and emergency response, so that the power grid can adapt to changes in operating conditions more quickly, and improve the adaptability and flexibility of the power grid.

[0118] In a specific embodiment, the specific implementation process of the distribution network protection setting optimization method provided by the present application is as follows: establish a basic parameter and initial protection setting ledger of the primary equipment of the county distribution network equipment to be optimized by setting calculation and protection setting; collect key information such as the main operation mode of the county distribution network to be optimized by setting calculation and protection setting; analyze the coordination of the initial protection setting of the county distribution network to be optimized by setting calculation and protection setting, and form a protection setting initial mismatch point ledger; with the help of setting calculation software or Excel spreadsheets or word documents and other tools, perform a first round of comprehensive pre-calculation of the protection setting of the county distribution network equipment to be optimized by setting calculation and protection setting, and form a first round of comprehensive pre-calculation of the protection setting ledger; the protection setting of the county distribution network equipment to be optimized by setting calculation and protection setting Statistics are taken on the coordination of the first round of comprehensive pre-calculation of setting values ​​to form the first round of comprehensive pre-calculation of setting calculation mismatch points, and the event levels that may be caused by the mismatch points are calculated one by one according to the risk calculation formula of the power grid; for the setting mismatch points in the first round of comprehensive pre-calculation that may lead to secondary events or higher-level events, a second round of verification is carried out on the setting mismatch points and the setting values ​​of the adjacent upper and lower level equipment; statistics are taken on the second round of verification results of the county distribution network equipment to be optimized for setting calculation protection settings to form the second round of verification mismatch points, and the event levels that may be caused by the mismatch points are recalculated one by one according to the risk calculation formula of the power grid; the initial protection settings of the county distribution network equipment to be optimized for setting calculation protection settings are compared with the protection settings after the second round of verification, and the elimination or degradation effect of the events that may be caused by the setting mismatch points is compared.

[0119] Compared with the prior art, this embodiment quantitatively calculates the consequences of the "setting calculation mismatch point" according to the risk calculation formula of the power grid, so as to achieve the purpose of making traceable comparisons of the advantages and disadvantages of protection settings in different regions according to local management requirements; optimizes the protection settings based on eliminating or reducing the severity of risks that may be caused by the "setting calculation mismatch point", so as to achieve the purpose of optimizing the reliability of power grid operation; optimizes the protection settings through a limited number of data iterations, so as to achieve the purpose of appropriately enriching the protection setting calculation link in order to improve the rationality of the protection settings.

[0120] In summary, the distribution network protection setting optimization method provided in this embodiment establishes the equipment basic parameters and initial protection setting ledger of the target distribution network, and obtains the operation mode information of the target distribution network; based on the equipment basic parameters, the initial protection setting ledger and the operation mode information, the initial protection setting coordination of the target distribution network is analyzed to generate the protection setting initial mismatch point ledger; based on the protection setting initial mismatch point ledger, the protection setting of the target distribution network is pre-calculated to generate the pre-calculated protection setting ledger; based on the pre-calculated protection setting ledger, the coordination of the target distribution network is counted to generate the corresponding setting calculation mismatch point, and the event level corresponding to the setting calculation mismatch point is calculated; the setting calculation mismatch point and its adjacent upper and lower level equipment protection setting are checked to generate the check result; the check result is counted to form the check mismatch point, and the event level corresponding to the check mismatch point is recalculated to generate the corresponding calculation result; based on the calculation result, the checked protection setting is compared with the initial protection setting, and the protection setting of the target distribution network is adjusted according to the comparison result. This embodiment provides a distribution network protection setting optimization scheme, which ensures that the protection setting more accurately reflects the actual operating conditions of the power grid through an iterative optimization method, reduces power grid accidents caused by improper protection setting, and the optimized protection setting helps to quickly isolate the faulty part and reduce the impact on other parts of the power grid, thereby improving the safety and reliability of the power grid.

[0121] In order to facilitate better implementation of the distribution network protection setting optimization method of the embodiment of the present application, the embodiment of the present application also provides a distribution network protection setting optimization device. The meanings of the terms are the same as those in the above distribution network protection setting optimization method, and the specific implementation details can refer to the description in the method embodiment.

[0122] See also Figure 2 , Figure 2 A schematic diagram of the structure of a distribution network protection setting optimization device provided in an embodiment of the present application, wherein the distribution network protection setting optimization device may specifically include an acquisition module 201, an analysis module 202, a pre-calculation module 203, a statistics module 204, a verification module 205, a calculation module 206 and a comparison module 207, which may be specifically as follows:

[0123] The acquisition module 201 is used to establish the basic parameters of the equipment and the initial protection setting value account of the target distribution network, and obtain the operation mode information of the target distribution network;

[0124] The analysis module 202 is used to analyze the coordination of the initial protection setting value of the target distribution network based on the basic parameters of the equipment, the initial protection setting value record and the operation mode information, and generate the protection setting value initial mismatch point record;

[0125] A pre-calculation module 203 is used to pre-calculate the protection setting of the target distribution network based on the protection setting initial mismatch point ledger to generate a pre-calculated protection setting ledger;

[0126] The statistical module 204 is used to collect statistics on the coordination of the target distribution network based on the pre-calculated protection setting value ledger, generate corresponding setting calculation mismatch points, and calculate the event level corresponding to the setting calculation mismatch points;

[0127] Verification module 205, used to verify the setting calculation mismatch point and its adjacent upper and lower level equipment protection setting values, and generate verification results;

[0128] The calculation module 206 is used to collect statistics on the verification results to form a verification mismatch point, and recalculate the event level corresponding to the verification mismatch point to generate a corresponding calculation result;

[0129] The comparison module 207 is used to compare the verified protection setting with the initial protection setting based on the calculation result, and adjust the protection setting of the target distribution network according to the comparison result.

[0130] The distribution network protection setting optimization device provided in this embodiment ensures that the protection setting more accurately reflects the actual operating conditions of the power grid through an iterative optimization method, reduces power grid accidents caused by improper protection setting, and the optimized protection setting helps to quickly isolate the faulty part and reduce the impact on other parts of the power grid, thereby improving the safety and reliability of the power grid.

[0131] For the specific definition of the distribution network protection constant optimization device, please refer to the definition of the distribution network protection constant optimization method above, which will not be repeated here. Each module in the above-mentioned distribution network protection constant optimization device can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0132] In addition, the present application also provides an electronic device, such as Figure 3 , which shows a schematic diagram of the structure of an electronic device involved in an embodiment of the present application. Specifically, the electronic device may include a processor 301 with one or more processing cores, a memory 302 with one or more computer-readable storage media, a power supply 303, an input unit 304 and other components. Those skilled in the art can understand that Figure 3 The electronic device structure shown in the figure does not constitute a limitation on the electronic device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0133] The processor 301 is the control center of the electronic device. It uses various interfaces and lines to connect various parts of the entire electronic device. By running or executing software programs and / or modules stored in the memory 302, and calling data stored in the memory 302, it executes various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. Optionally, the processor 301 may include one or more processing cores; preferably, the processor 301 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 301.

[0134] The memory 302 can be used to store software programs and modules. The processor 301 executes various functional applications and the distribution network protection setting optimization method by running the software programs and modules stored in the memory 302. The memory 302 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the electronic device, etc. In addition, the memory 302 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. Accordingly, the memory 302 may also include a memory controller to provide the processor 301 with access to the memory 302.

[0135] The electronic device also includes a power supply 303 for supplying power to various components. Preferably, the power supply 303 can be logically connected to the processor 301 through a power management system, so as to manage charging, discharging, power consumption and other functions through the power management system. The power supply 303 can also include one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, power status indicators and other arbitrary components.

[0136] The electronic device may further include an input unit 304, which may be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

[0137] Although not shown, the electronic device may further include a display unit, etc., which will not be described in detail herein. Specifically in this embodiment, the processor 301 in the electronic device will load the executable files corresponding to the processes of one or more application programs into the memory 302 according to the following instructions, and the processor 301 will run the application programs stored in the memory 302, thereby realizing various functions, as follows:

[0138] Establish a record of basic equipment parameters and initial protection settings of the target distribution network, and obtain the operating mode information of the target distribution network; analyze the coordination of the initial protection settings of the target distribution network based on the basic equipment parameters, the initial protection settings record and the operating mode information, and generate a record of initial mismatch points of protection settings; pre-calculate the protection settings of the target distribution network based on the record of initial mismatch points of protection settings, and generate a record of pre-calculated protection settings; count the coordination of the target distribution network based on the record of pre-calculated protection settings, generate the corresponding setting calculation mismatch points, and calculate the event levels corresponding to the setting calculation mismatch points; calibrate the setting calculation mismatch points and the protection settings of the adjacent upper and lower level equipment to generate calibration results; count the calibration results to form calibration mismatch points, and recalculate the event levels corresponding to the calibration mismatch points to generate corresponding calculation results; compare the calibrated protection settings with the initial protection settings based on the calculation results, and adjust the protection settings of the target distribution network according to the comparison results.

[0139] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0140] The embodiments of the present application use an iterative optimization method to ensure that the protection settings more accurately reflect the actual operating conditions of the power grid, reduce power grid accidents caused by improper protection setting settings, and the optimized protection settings help to quickly isolate the faulty part and reduce the impact on other parts of the power grid, thereby improving the safety and reliability of the power grid.

[0141] A person of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be completed by instructions, or by controlling related hardware through instructions. The instructions may be stored in a computer-readable storage medium and loaded and executed by a processor.

[0142] To this end, an embodiment of the present application provides a storage medium in which a plurality of instructions are stored, and the instructions can be loaded by a processor to execute the steps in any one of the distribution network protection setting optimization methods provided in the embodiments of the present application. For example, the instructions can execute the following steps:

[0143] Establish a record of basic equipment parameters and initial protection settings of the target distribution network, and obtain the operating mode information of the target distribution network; analyze the coordination of the initial protection settings of the target distribution network based on the basic equipment parameters, the initial protection settings record and the operating mode information, and generate a record of initial mismatch points of protection settings; pre-calculate the protection settings of the target distribution network based on the record of initial mismatch points of protection settings, and generate a record of pre-calculated protection settings; count the coordination of the target distribution network based on the record of pre-calculated protection settings, generate the corresponding setting calculation mismatch points, and calculate the event levels corresponding to the setting calculation mismatch points; calibrate the setting calculation mismatch points and the protection settings of the adjacent upper and lower level equipment to generate calibration results; count the calibration results to form calibration mismatch points, and recalculate the event levels corresponding to the calibration mismatch points to generate corresponding calculation results; compare the calibrated protection settings with the initial protection settings based on the calculation results, and adjust the protection settings of the target distribution network according to the comparison results.

[0144] The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

[0145] The storage medium may include: a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, etc. Since the instructions stored in the storage medium can execute the steps in any of the distribution network protection setting optimization methods provided in the embodiments of the present application, the beneficial effects that can be achieved by any of the distribution network protection setting optimization methods provided in the embodiments of the present application can be achieved. For details, please refer to the previous embodiments and will not be repeated here.

[0146] The above is a detailed introduction to a distribution network protection setting optimization method, device, electronic device and storage medium provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A distribution network protection setting optimization method, characterized in that: The steps include: Establish equipment basic parameters and initial protection setting value records of the target distribution network, and obtain operation mode information of the target distribution network; Based on the basic parameters of the equipment, the initial protection setting value ledger and the operation mode information, the initial protection setting value coordination of the target distribution network is analyzed to generate a protection setting value initial mismatch point ledger; Pre-calculating the protection setting value of the target distribution network based on the protection setting value initial mismatch point ledger to generate a pre-calculated protection setting value ledger; Based on the pre-calculated protection setting value ledger, statistics are collected on the coordination status of the target distribution network, a corresponding setting calculation mismatch point is generated, and an event level corresponding to the setting calculation mismatch point is calculated; Verify the setting calculation mismatch point and its adjacent upper and lower level equipment protection settings to generate verification results; The verification results are counted to form verification mismatch points, and the event levels corresponding to the verification mismatch points are recalculated to generate corresponding calculation results; Based on the calculation result, the verified protection setting is compared with the initial protection setting, and the protection setting of the target distribution network is adjusted according to the comparison result.

2. The method for optimizing the protection setting of the distribution network according to claim 1, characterized in that: The analyzing the coordination of the initial protection setting value of the target distribution network based on the basic parameters of the equipment, the initial protection setting value ledger and the operation mode information to generate the protection setting value initial mismatch point ledger includes: Based on the basic parameters of the equipment, the initial protection setting record and the operation mode information, simulate the action response of the protection device of the target distribution network under fault conditions to generate simulation results; Based on the simulation results and the preset protection logic, identifying the initial mismatch point in the protection setting configuration corresponding to the target distribution network; A protection constant initial mismatch point record is generated based on the initial mismatch point.

3. The method for optimizing the protection setting of the distribution network according to claim 1, characterized in that: The pre-calculating the protection setting value of the target distribution network based on the protection setting value initial mismatch point ledger to generate a pre-calculated protection setting value ledger includes: Based on the protection setting value initial mismatch point ledger, adjusting the initial protection setting value of the target distribution network; Use the setting calculation software to simulate the adjusted protection setting value and generate simulation calculation results; Based on the simulation calculation results, a pre-calculated protection constant value ledger is generated.

4. The method for optimizing the protection setting of the distribution network according to claim 1, characterized in that: The statistics of the coordination of the target distribution network based on the pre-calculated protection setting value ledger are generated, the corresponding setting calculation mismatch point is generated, and the event level corresponding to the setting calculation mismatch point is calculated, including: Based on the pre-calculated protection setting value ledger, statistics are collected on the coordination of each protection setting value, and corresponding setting calculation mismatch points are generated; Calculate the event level corresponding to each mismatch point according to the power grid risk calculation formula; The event level corresponding to the setting calculation mismatch point is evaluated, and a first evaluation result is generated and recorded.

5. The method for optimizing the protection setting of the distribution network according to claim 1, characterized in that: The step of verifying the setting calculation mismatch point and its adjacent upper and lower level equipment protection settings to generate verification results includes: Obtaining a first evaluation result of an event level corresponding to the setting calculation mismatch point; selecting a target tuning mismatch point based on the first evaluation result; The target setting mismatch point and the equipment settings of the adjacent upper and lower levels are checked to generate a check result; Based on the verification results, a protection setting verification mismatch point ledger is generated.

6. The method for optimizing the protection setting of the distribution network according to claim 1, characterized in that: The counting of the verification results to form a verification mismatch point, and recalculating the event level corresponding to the verification mismatch point to generate a corresponding calculation result includes: Obtain the protection setting value verification mismatch point ledger corresponding to the verification result; Based on the protection setting value verification mismatch point ledger, an adjusted protection setting value is determined; Based on the adjusted protection setting and distribution network operation data, the event level corresponding to the setting calculation mismatch point is recalculated to generate a corresponding calculation result.

7. The method for optimizing the protection setting of the distribution network according to claim 1, characterized in that: Based on the calculation result, comparing the verified protection setting value with the initial protection setting value, and adjusting the protection setting value of the target distribution network according to the comparison result, including: Based on the calculation result, the calibrated protection setting value is compared with the initial protection setting value to obtain a comparison result; Based on the comparison result, an event level change evaluation is performed on the setting mismatch point to obtain a second evaluation result; Based on the second evaluation result, generating protection setting value optimization suggestions; The protection setting of the target distribution network is adjusted based on the protection setting optimization suggestion.

8. A distribution network protection setting optimization device, characterized in that: include: The acquisition module is used to establish the basic equipment parameters and initial protection setting value records of the target distribution network, and obtain the operation mode information of the target distribution network; An analysis module, configured to analyze the coordination of the initial protection setting values ​​of the target distribution network based on the basic parameters of the equipment, the initial protection setting value ledger and the operation mode information, and generate a protection setting value initial mismatch point ledger; A pre-calculation module, used to pre-calculate the protection setting of the target distribution network based on the protection setting initial mismatch point ledger, and generate a pre-calculated protection setting ledger; A statistical module, used to collect statistics on the coordination of the target distribution network based on the pre-calculated protection setting value ledger, generate corresponding setting calculation mismatch points, and calculate the event level corresponding to the setting calculation mismatch points; A verification module is used to verify the setting calculation mismatch point and its adjacent upper and lower level equipment protection settings to generate a verification result; A calculation module, used for performing statistics on the verification results to form verification mismatch points, and recalculating event levels corresponding to the verification mismatch points to generate corresponding calculation results; A comparison module is used to compare the verified protection setting with the initial protection setting based on the calculation result, and adjust the protection setting of the target distribution network according to the comparison result.

9. An electronic device, characterized in that: include: A memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor executes the program according to the steps of the distribution network protection setting optimization method as described in any one of claims 1 to 7.

10. A storage medium, characterized in that: A computer program is stored which can be loaded by a processor and executes the distribution network protection setting optimization method as described in any one of claims 1 to 7.

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