Static voltage checking method and device

Abstract

The invention discloses a static voltage checking method and device. According to the invention, after a power flow data file and a breaking element set are obtained, simulation is carried out by using a power flow calculation program to obtain an initial node voltage set; breaking and simulating each element in the breaking element set one by one, and judging whether a calculation result is converged or not; and if so, reading the voltage of the corresponding node. Thirdly, the node voltages are compared with an initial voltage set, voltage deviation and out-of-limit conditions are calculated, a fault voltage out-of-limit table is finally generated, and out-of-limit voltages, out-of-limit types and deviation rates of all the nodes are recorded; according to the method, the analysis efficiency of the power grid fault influence is improved, and specific guidance information is provided for operation maintenance and optimization of the power grid by accurately recording the out-of-limit condition, so that the problem that a large amount of voltage in a power system cannot be efficiently checked in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of static voltage calibration, and in particular to a static voltage calibration method and device. Background Art

[0002] After introducing the BPA power system simulation calculation software, the Electric Power Research Institute further developed and improved it to form a Chinese version of the BPA program (PSD-BPA) suitable for power system analysis and calculation, which has been widely used in power system planning and design, power grid dispatching and operation, and teaching and scientific research departments.

[0003] "Statistical Analysis Method of Reactive Voltage of Southern Power Grid Dispatching Organization" stipulates the voltage quality control standard of the power grid. Among them, in normal operation mode, the allowable deviation of 500kV bus voltage is 0%~+10% of the system rated voltage (500kV~550kV), and the allowable deviation of 220kV bus voltage is 0~+10% of the system rated voltage (220kV~242kV). For buses whose voltage levels have a significant impact on system safety and stability, the dispatching organization should clarify the lower limit of the allowable voltage deviation based on the results of system safety and stability analysis.

[0004] When preparing the annual reactive voltage operation plan, the power grid dispatching department needs to conduct N-1 static voltage safety analysis on the power grid system under different operation modes in order to find the voltage-weak bus. At present, the conventional practice of mode calculation personnel is to selectively select a batch of components (lines or transformers), manually disconnect the components one by one in the BPA flow data file (suffixed with dat) to perform flow calculations, and check the bus voltage over-limit caused by this. This method not only has omissions, but also is cumbersome and time-consuming; another method is to use the N-1 disconnection simulation function of BPA, and the program automatically disconnects the components in turn in the specified partition to perform N-1 safety verification analysis, but the result file of this method only outputs the component overload and bus voltage over-limit conditions, and does not output the voltage change results for the bus whose voltage does not exceed the limit.

[0005] At present, the calculation personnel either manually disconnect the components one by one in the BPA flow data file to perform flow calculations and check the bus voltage over-limit caused by this. However, the number of components in provincial power grids is often huge. Manual calculation and checking of relevant voltage data is not only a large workload, but also has problems such as slow speed, low efficiency, and easy errors. Or use the N-1 safety verification function of BPA, but the result file of this method only outputs component overload and bus voltage over-limit conditions, and does not output results for the voltage change of the bus that does not exceed the voltage limit. These effects make it impossible for existing technologies to efficiently verify a large number of voltages in the power system. Summary of the invention

[0006] The present invention provides a static voltage calibration method and device to solve the problem in the prior art that a large number of voltages in an electric power system cannot be efficiently calibrated.

[0007] In a first aspect, the present application provides a static voltage calibration method, comprising:

[0008] Obtain power flow data files and disconnection component sets;

[0009] According to the power flow calculation program, the power flow data file is simulated to obtain the initial node voltage set of the partition to be checked;

[0010] According to the power flow calculation program, each component in the breaking component set is disconnected one by one and simulated to obtain each simulation calculation result;

[0011] Determine whether the simulation calculation results are converged, and if so, read the voltages of all nodes of the partition to be checked;

[0012] The voltages of all nodes in the partition to be checked are compared with the initial node voltage set, and the voltage deviation and voltage over-limit situation of each node voltage are calculated to obtain a fault voltage over-limit table; wherein the fault voltage over-limit table records each bus name, each over-limit type and each deviation rate of each node over-limit voltage.

[0013] This application provides a detailed data basis for the static voltage safety verification of the power grid by obtaining the power flow data file and the disconnection component set. Then, the power flow data file is simulated using the power flow calculation program to obtain the initial node voltage set of the partition to be verified, which establishes a benchmark for the voltage distribution of the power grid under normal conditions. Then, by disconnecting and simulating each component in the disconnection component set one by one, the method can simulate the performance of the power grid under different fault conditions and obtain various simulation calculation results. By judging whether these simulation calculation results converge, the application ensures the reliability of the simulation results. If converged, the voltage of all nodes in the partition to be verified is read. Finally, these node voltages are compared with the initial node voltage set, and the voltage deviation and voltage over-limit of each node voltage are calculated to obtain the fault voltage over-limit table. This step can accurately identify and record the voltage anomalies caused by faults in the power grid. This application can provide key voltage safety information to grid operators by systematically analyzing the voltage changes of the grid under normal and fault conditions, so that timely measures can be taken to prevent potential voltage instability and power outages, enhance the reliability and safety of the grid, and solve the problem in the existing technology that a large number of voltages in the power system cannot be efficiently calibrated.

[0014] As a preferred embodiment of the first aspect, the acquiring of the power flow data file and the breaking component set is specifically:

[0015] According to the power flow data file, all nodes and all line branches and transformer branches in the power grid are obtained;

[0016] According to the preset screening conditions, all nodes and all line branches and transformer branches, the nodes, line branches and transformer branches of the partition to be checked are screened;

[0017] The corresponding record rows of the line branch and the transformer branch in the power flow file are identified, the bus name and the reference voltage at both ends of the branch, and the row number of the row are recorded, and a breaking component set is obtained.

[0018] In this preferred embodiment, the present application first comprehensively collects information on all nodes and line and transformer branches in the power grid to ensure a complete understanding of the power grid structure. Then, using the preset screening conditions, the key nodes and branches of the partition to be verified are accurately identified. This step makes the analysis more targeted and can concentrate resources and attention on the most critical part of the power grid. Finally, by identifying and recording the corresponding record lines of the line branches and transformer branches in the flow file, including the bus name, reference voltage and number of rows, a detailed set of disconnecting elements is formed, which provides accurate data support for subsequent one-by-one disconnection and simulation calculations. The present application improves the accuracy and efficiency of power grid fault analysis by finely managing power grid data, making dynamic monitoring and risk assessment of the power grid more reliable, thereby providing a solid foundation for the safe operation and optimized management of the power grid.

[0019] As a preferred embodiment of the first aspect, the power flow data file is simulated according to the power flow calculation program to obtain the initial node voltage set of the partition to be verified, specifically:

[0020] According to the power flow calculation program, the power flow data file is simulated to obtain the initial voltage of the partition node to be checked;

[0021] According to a first preset threshold, determining whether each initial voltage of all the components exceeds a limit;

[0022] If the initial voltage of the component is greater than a first preset threshold, confirming that the initial voltage of the component exceeds an upper limit;

[0023] According to a second preset threshold, determining whether each initial voltage of all the components exceeds a limit;

[0024] If the initial voltage of the component is less than a second preset threshold, confirming that the initial voltage of the component exceeds a lower limit;

[0025] If the initial voltage of the component is neither greater than the first preset threshold nor less than the second preset threshold, confirming that the initial voltage of the component is within the limit;

[0026] An initial node voltage set is obtained according to the initial voltages that do not exceed the limit.

[0027] In this preferred embodiment, the present application can obtain the initial voltage of the partition node to be verified by simulating the flow data file using a flow calculation program, and provide benchmark data for the normal operation status of the power grid. Subsequently, by comparing these initial voltages with preset thresholds, the present application can accurately determine whether the voltage of each component exceeds the safe range. Specifically, if the initial voltage of the component exceeds the upper limit threshold, the system will confirm that the voltage of the component exceeds the upper limit; if it is lower than the lower limit threshold, it is confirmed that the voltage exceeds the lower limit. This binary judgment process ensures the rapid identification of voltage over-limit situations, and for those components that do not exceed the limit, their initial voltages will be included in the initial node voltage set. The present application not only improves the efficiency of monitoring the voltage status of the power grid, but also helps to prevent potential power supply problems by accurately identifying voltage over-limit situations, thereby enhancing the stability and reliability of the power grid.

[0028] As a preferred embodiment of the first aspect, the elements in the breaking element set are broken one by one, and the power flow calculation program is called to simulate the power flow data file to obtain the voltage of the partition node to be checked, and the voltage is compared with the initial node voltage set, and the voltage deviation and voltage over-limit of each node voltage are calculated to obtain the fault voltage over-limit table, which is specifically:

[0029] Subtract the node voltage of the partition to be checked obtained by simulation calculation after disconnecting one component each time from the initial voltage of the corresponding node in the node voltage set to obtain the voltage deviation of each node voltage of the partition to be checked;

[0030] If the node voltage of the component is greater than a first preset threshold, it is confirmed that the post-fault voltage of the component exceeds an upper limit;

[0031] If the node voltage of the component is less than a second preset threshold, confirming that the post-fault voltage of the component exceeds a lower limit;

[0032] According to the voltage deviation and over-limit type of each node, a fault voltage over-limit table is obtained.

[0033] In this preferred embodiment, the present application can systematically simulate the voltage response of the power grid under various fault conditions by opening and closing the components in the disconnection component set one by one and calling the flow calculation program for simulation, thereby obtaining the voltage of the partition node to be verified. It allows the node voltage obtained by simulation calculation after each disconnection element to be accurately compared with the initial node voltage set, so as to calculate the voltage deviation of each node. The present application can accurately identify the voltage deviation and determine whether the voltage exceeds the limit, whether it exceeds the upper limit or the lower limit, according to the first preset threshold and the second preset threshold. In this way, a detailed fault voltage over-limit table can be generated, recording the voltage deviation and over-limit type of each node, providing key voltage safety information for power grid operators. This information is crucial for quickly identifying potential risks in the power grid, evaluating the stability of the power grid, and formulating corresponding preventive measures, thereby improving the reliability and safety of the power grid.

[0034] As a preferred embodiment of the first aspect, if the node voltage of the component is greater than the first preset threshold, the post-fault voltage of the component exceeds the upper limit, further comprising:

[0035] According to the node voltage of the element, the first preset threshold value and the first formula, a voltage exceeding the upper limit rate of the node whose voltage exceeds the upper limit is calculated;

[0036] The first formula is Ui=(U-Umax) / Umax*100;

[0037] Wherein, Umax is the first preset threshold, U is the node voltage that exceeds the upper limit, and Ui is the voltage exceeding the upper limit rate.

[0038] If the node voltage of the component is less than the second preset threshold, the post-fault voltage of the component is lower than the lower limit, further comprising:

[0039] According to the node voltage of the element, the second preset threshold value and the second formula, a voltage lower limit rate of the node whose voltage is lower than the lower limit is calculated;

[0040] The second formula is Ui=(Umin-U) / Umin*100;

[0041] Wherein, Umin is the second preset threshold, U is the node voltage that exceeds the lower limit, and Ui is the voltage lower limit rate.

[0042] In this preferred embodiment, the present application adds a quantitative analysis of the voltage over-limit situation to the static voltage verification method. This method can not only identify the nodes where the voltage exceeds the first preset threshold value (Umax) and is lower than the second preset threshold value (Umin) after the fault, but also calculates the voltage over-limit rate and the voltage over-limit rate respectively by applying the first formula Ui=(U-Umax) / Umax*100 and the second formula Ui=(Umin-U) / Umin*100, providing a specific voltage deviation percentage for the power grid operator. This quantitative analysis helps to more accurately evaluate the voltage stability of the power grid under fault conditions, so that the operator can quickly identify the severity of the voltage deviation according to the size of the over-limit rate, and formulate corresponding countermeasures accordingly. This method enhances the in-depth understanding of the impact of power grid faults by providing specific values ​​of voltage deviations, thereby improving the efficiency of power grid fault response and the safety of power grid operation, and ensuring the reliability of power supply.

[0043] In a second aspect, the present application provides a static voltage calibration device. The static voltage calibration device comprises an acquisition module, a first simulation module, a second simulation module, a judgment module and a calibration module;

[0044] The acquisition module is used to obtain the power flow data file and the breaking component set;

[0045] The first simulation module simulates the power flow data file according to the power flow calculation program to obtain the initial node voltage set of the partition to be checked;

[0046] The second simulation module is used to disconnect and simulate the components in the disconnect component set one by one according to the power flow calculation program to obtain various simulation calculation results;

[0047] The judgment module is used to judge whether the simulation calculation results are converged. If converged, the voltage of all nodes of the partition to be checked is read;

[0048] The verification module is used to compare the voltages of all nodes in the partition to be verified with the initial node voltage set, and calculate the voltage deviation and voltage over-limit situation of each node voltage to obtain a fault voltage over-limit table; wherein the fault voltage over-limit table records the bus name, each over-limit type and each deviation rate of each node over-limit voltage.

[0049] This device uses five modules to divide the work and coordinate the work to better check the static voltage. This application provides a detailed data basis for the static voltage safety check of the power grid by obtaining the power flow data file and the disconnection component set. Then, the power flow data file is simulated using the power flow calculation program to obtain the initial node voltage set of the partition to be checked, which establishes a benchmark for the voltage distribution of the power grid under normal conditions. Then, by disconnecting and simulating each component in the disconnection component set one by one, this method can simulate the performance of the power grid under different fault conditions and obtain various simulation calculation results. By judging whether these simulation calculation results converge, this application ensures the reliability of the simulation results. If converged, the voltage of all nodes in the partition to be checked is read. Finally, these node voltages are compared with the initial node voltage set, and the voltage deviation and voltage over-limit of each node voltage are calculated to obtain the fault voltage over-limit table. This step can accurately identify and record the voltage anomalies caused by faults in the power grid. This application can provide key voltage safety information to grid operators by systematically analyzing the voltage changes of the grid under normal and fault conditions, so that timely measures can be taken to prevent potential voltage instability and power outages, enhance the reliability and safety of the grid, and solve the problem in the existing technology that a large number of voltages in the power system cannot be efficiently calibrated.

[0050] As a preferred embodiment of the second aspect, the acquiring of the power flow data file and the breaking component set is specifically:

[0051] According to the power flow data file, all nodes and all line branches and transformer branches in the power grid are obtained;

[0052] According to the preset screening conditions, all nodes and all line branches and transformer branches, the nodes, line branches and transformer branches of the partition to be checked are screened;

[0053] The corresponding record rows of the line branch and the transformer branch in the power flow file are identified, the bus name and the reference voltage at both ends of the branch, and the row number of the row are recorded, and a breaking component set is obtained.

[0054] In this preferred embodiment, the present application first comprehensively collects information on all nodes and line and transformer branches in the power grid to ensure a complete understanding of the power grid structure. Then, using the preset screening conditions, the key nodes and branches of the partition to be verified are accurately identified. This step makes the analysis more targeted and can concentrate resources and attention on the most critical part of the power grid. Finally, by identifying and recording the corresponding record lines of the line branches and transformer branches in the flow file, including the bus name, reference voltage and number of rows, a detailed set of disconnecting elements is formed, which provides accurate data support for subsequent one-by-one disconnection and simulation calculations. The present application improves the accuracy and efficiency of power grid fault analysis by finely managing power grid data, making dynamic monitoring and risk assessment of the power grid more reliable, thereby providing a solid foundation for the safe operation and optimized management of the power grid.

[0055] As a preferred embodiment of the second aspect, the power flow data file is simulated according to the power flow calculation program to obtain the initial node voltage set of the partition to be checked, specifically:

[0056] According to the power flow calculation program, the power flow data file is simulated to obtain the initial voltage of the partition node to be checked;

[0057] According to a first preset threshold, determining whether each initial voltage of all the components exceeds a limit;

[0058] If the initial voltage of the component is greater than a first preset threshold, confirming that the initial voltage of the component exceeds an upper limit;

[0059] According to a second preset threshold, determining whether each initial voltage of all the components exceeds a limit;

[0060] If the initial voltage of the component is less than a second preset threshold, confirming that the initial voltage of the component exceeds a lower limit;

[0061] If the initial voltage of the component is neither greater than the first preset threshold nor less than the second preset threshold, confirming that the initial voltage of the component is within the limit;

[0062] An initial node voltage set is obtained according to the initial voltages that do not exceed the limit.

[0063] In this preferred embodiment, the present application can obtain the initial voltage of the partition node to be verified by simulating the flow data file using a flow calculation program, and provide benchmark data for the normal operation status of the power grid. Subsequently, by comparing these initial voltages with preset thresholds, the present application can accurately determine whether the voltage of each component exceeds the safe range. Specifically, if the initial voltage of the component exceeds the upper limit threshold, the system will confirm that the voltage of the component exceeds the upper limit; if it is lower than the lower limit threshold, it is confirmed that the voltage exceeds the lower limit. This binary judgment process ensures the rapid identification of voltage over-limit situations, and for those components that do not exceed the limit, their initial voltages will be included in the initial node voltage set. The present application not only improves the efficiency of monitoring the voltage status of the power grid, but also helps to prevent potential power supply problems by accurately identifying voltage over-limit situations, thereby enhancing the stability and reliability of the power grid.

[0064] As a preferred embodiment of the second aspect, the elements in the breaking element set are broken one by one, and the power flow calculation program is called to simulate the power flow data file to obtain the voltage of the partition node to be checked, and the voltage is compared with the initial node voltage set, and the voltage deviation and voltage over-limit of each node voltage are calculated to obtain the fault voltage over-limit table, which is specifically:

[0065] Subtract the node voltage of the partition to be checked obtained by simulation calculation after disconnecting one component each time from the initial voltage of the corresponding node in the node voltage set to obtain the voltage deviation of each node voltage of the partition to be checked;

[0066] If the node voltage of the component is greater than a first preset threshold, it is confirmed that the post-fault voltage of the component exceeds an upper limit;

[0067] If the node voltage of the component is less than a second preset threshold, confirming that the post-fault voltage of the component exceeds a lower limit;

[0068] According to the voltage deviation and over-limit type of each node, a fault voltage over-limit table is obtained.

[0069] In this preferred embodiment, the present application can systematically simulate the voltage response of the power grid under various fault conditions by opening and closing the components in the disconnection component set one by one and calling the flow calculation program for simulation, thereby obtaining the voltage of the partition node to be verified. It allows the node voltage obtained by simulation calculation after each disconnection element to be accurately compared with the initial node voltage set, so as to calculate the voltage deviation of each node. The present application can accurately identify the voltage deviation and determine whether the voltage exceeds the limit, whether it exceeds the upper limit or the lower limit, according to the first preset threshold and the second preset threshold. In this way, a detailed fault voltage over-limit table can be generated, recording the voltage deviation and over-limit type of each node, providing key voltage safety information for power grid operators. This information is crucial for quickly identifying potential risks in the power grid, evaluating the stability of the power grid, and formulating corresponding preventive measures, thereby improving the reliability and safety of the power grid.

[0070] As a preferred embodiment of the second aspect, if the node voltage of the component is greater than the first preset threshold, the post-fault voltage of the component exceeds the upper limit, further comprising:

[0071] According to the node voltage of the element, the first preset threshold value and the first formula, a voltage exceeding the upper limit rate of the node whose voltage exceeds the upper limit is calculated;

[0072] The first formula is Ui=(U-Umax) / Umax*100;

[0073] Wherein, Umax is the first preset threshold, U is the node voltage that exceeds the upper limit, and Ui is the voltage exceeding the upper limit rate.

[0074] If the node voltage of the component is less than the second preset threshold, the post-fault voltage of the component is lower than the lower limit, further comprising:

[0075] According to the node voltage of the element, the second preset threshold value and the second formula, a voltage lower limit rate of the node whose voltage is lower than the lower limit is calculated;

[0076] The second formula is Ui=(Umin-U) / Umin*100;

[0077] Wherein, Umin is the second preset threshold, U is the node voltage that exceeds the lower limit, and Ui is the voltage lower limit rate.

[0078] In this preferred embodiment, the present application adds a quantitative analysis of the voltage over-limit situation to the static voltage verification method. This method can not only identify the nodes where the voltage exceeds the first preset threshold value (Umax) and is lower than the second preset threshold value (Umin) after the fault, but also calculates the voltage over-limit rate and the voltage over-limit rate respectively by applying the first formula Ui=(U-Umax) / Umax*100 and the second formula Ui=(Umin-U) / Umin*100, providing a specific voltage deviation percentage for the power grid operator. This quantitative analysis helps to more accurately evaluate the voltage stability of the power grid under fault conditions, so that the operator can quickly identify the severity of the voltage deviation according to the size of the over-limit rate, and formulate corresponding countermeasures accordingly. This method enhances the in-depth understanding of the impact of power grid faults by providing specific values ​​of voltage deviations, thereby improving the efficiency of power grid fault response and the safety of power grid operation, and ensuring the reliability of power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] Figure 1 : A schematic diagram of a flow chart of an embodiment of a static voltage calibration method provided by the present application;

[0080] Figure 2 : A structural diagram of an embodiment of the base state voltage over-limit provided by the present application;

[0081] Figure 3 : A structural diagram of an embodiment of a calculation failure event case provided by the present application;

[0082] Figure 4 : A structural diagram of an embodiment of voltage exceeding the limit after a fault provided by the present application;

[0083] Figure 5 : A structural schematic diagram of an embodiment of the static voltage calibration method process provided by the present application;

[0084] Figure 6 : A structural schematic diagram of an embodiment of a static voltage calibration device provided in the present application. DETAILED DESCRIPTION

[0085] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0086] Embodiment 1

[0087] Please refer to Figure 1, which is a static voltage calibration method provided by an embodiment of the present invention.

[0088] In this embodiment, the static voltage verification process in this application is described in detail through steps S01-S05.

[0089] S01: Get the power flow data file and the breaking component set.

[0090] As a preferred embodiment of the first embodiment, the process of obtaining the breaking element set is specifically as follows:

[0091] (1) Read the power flow file in step S1 line by line, and determine whether the 1st to 2nd columns of the read line are "B", and whether the partition name in the 19th to 20th columns is the partition to be verified;

[0092] (2) If no, perform the operation of step (1) on the next line in the power flow file; if yes, record the bus name (columns 7 to 14) and reference voltage (columns 15 to 18) in the data of the line;

[0093] (3) Repeat (1) to (2) until all rows are read and judged, and generate a data table Tbus of all nodes in the partition to be checked. Each node is uniquely identified by the bus name and bus voltage.

[0094] (4) Read the power flow file in step S1 line by line, and determine whether the first to second columns of the read line are "L" (representing a line branch) or "T" (representing a transformer branch), and execute one of (5) to (7) according to the determination result;

[0095] (5) If the 1st to 2nd columns of the current row are "L", extract the bus name 1 (columns 7 to 14) and reference voltage 1 (columns 15 to 18) at the head end of the row, and the bus name 2 (columns 20 to 27) and reference voltage 2 (columns 28 to 31) at the end, and determine whether one of the two is in the Tbus generated in (3) (one end of the line may be in another partition). If so, record the bus names and reference voltages at both ends of the line, as well as the row number of the row, and add them to the disconnection element set Eset;

[0096] (6) If the 1st to 2nd columns of the current row are "T", extract the first end bus name 1 (columns 7 to 14) and reference voltage 1 (columns 15 to 18), the end bus name 2 (columns 20 to 27) and reference voltage 2 (columns 28 to 31) of the row, and determine whether these two are in the Tbus generated by (3) (both ends of the transformer should be in the same partition). If so, record the bus name and reference voltage at both ends of the transformer branch, as well as the row number of the row, and add them to the disconnection element set Eset;

[0097] (7) If the first and second columns of the current row are neither "L" nor "T", execute (4) until all rows are read and the disconnection element set is obtained.

[0098] In this preferred embodiment, the present application first obtains all components and connection nodes in the power grid according to the flow data file, providing a comprehensive data basis for subsequent screening. Then, each component and its connection node are screened out according to the preset screening conditions, and further focus on the key parts that need to be analyzed. Then, the corresponding record lines of these components and nodes in the flow file are identified and the identification is added to obtain the disconnection component set, which enables these components to be quickly and accurately located and processed in the subsequent analysis process. Compared with the traditional method of manually selecting components from a large amount of data, this method is more efficient and accurate, avoiding omissions and errors that may be caused by manual operation, thereby providing reliable data preparation for subsequent flow calculations and voltage safety verification, helping to improve the efficiency and accuracy of the entire static voltage safety verification process, and reducing the workload of computer personnel as well as time and labor costs.

[0099] S02: According to a power flow calculation program, the power flow data file is simulated to obtain an initial node voltage set of the partition to be verified.

[0100] As a preferred embodiment of the first embodiment, the power flow data file is simulated according to the power flow calculation program to obtain the initial node voltage set of the partition to be checked, specifically:

[0101] Call the BPA power flow calculation program PFNT.exe to simulate the power flow data file and obtain the power flow result file;

[0102] Read the power flow result file to obtain the initial voltage U0 of the node in the partition to be checked;

[0103] Determine whether the initial voltage exceeds the limit. For nodes exceeding the voltage upper limit Umax, the limit-exceeding type is recorded as "over the upper limit", and the voltage limit-exceeding rate (%) is calculated as (U0-Umax) / Umax*100; for nodes below the voltage lower limit Umin, the limit-exceeding type is recorded as "over the lower limit", and the voltage limit-exceeding rate (%) is calculated as (Umin-U0) / Umin*100; the nodes whose initial voltage exceeds the limit are recorded in the "base state voltage limit-exceeding" table, and the "base state voltage limit-exceeding" table is as follows: Figure 2 As shown, the nodes do not participate in the subsequent voltage comparison; the nodes whose initial voltages do not exceed the limit have their initial voltages recorded to form a node voltage set Vset.

[0104] In this preferred embodiment, the present application simulates the power flow data file by calling the power flow calculation program PFNT.exe of BPA, and the method can accurately obtain the initial voltage distribution of the power grid under normal operating conditions. This step is crucial because it provides benchmark data for subsequent voltage safety analysis. Then, by reading the power flow result file and obtaining the initial voltage U0 of the partition node to be verified, the method can make a preliminary assessment of the voltage level of each node. Further, by judging whether the initial voltage exceeds the limit and calculating the voltage limit rate, the method can identify those nodes that have exceeded the safety range under normal operating conditions. These nodes are recorded in the "base voltage limit" table and will not participate in the subsequent voltage comparison, thereby ensuring the accuracy and efficiency of the analysis. For nodes whose initial voltage does not exceed the limit, their initial voltage is recorded to form a node voltage set Vset, which provides the necessary data basis for the subsequent disconnection simulation and voltage deviation analysis. This process infers that the method not only improves the automation of voltage safety analysis, but also ensures the accuracy of subsequent analysis and the safety of power grid operation by accurately identifying and excluding nodes with base voltage limit violations.

[0105] S03: According to the power flow calculation program, each component in the breaking component set is disconnected one by one and simulated to obtain each simulation calculation result.

[0106] As a preferred embodiment of the first embodiment, according to the power flow calculation program, each component in the breaking component set is disconnected one by one and simulated to obtain each simulation calculation result, which is specifically:

[0107] The obtained breaking component sets Eset are read one by one, and the lines of the power flow data file are commented out according to the number of the breaking component lines (a "." is added to the beginning of the line), and the power flow calculation program of BPA is called to perform simulation calculation on the power flow data file.

[0108] S04: Determine whether the simulation calculation results have converged. If so, read the voltages of all nodes of the partition to be checked.

[0109] As a preferred embodiment of the first embodiment, the determination of whether the simulation calculation results converge, if converged, reading the voltages of all nodes of the partition to be checked. Specifically:

[0110] Determine whether the calculation has converged based on the flow result file. If the calculation does not converge, record it in the "Calculation Failure Event" table, such as Figure 3 As shown; if the calculation converges, read the power flow results and obtain the node voltage after the disconnection element.

[0111] In this preferred embodiment, when the calculation does not converge, the application records these events in the "calculation failure event" table, such as Figure 3As shown in the figure, this can quickly identify and locate cases where problems occur during the simulation process, providing clear clues and references for further analysis and problem solving, thereby avoiding invalid analysis of problem data and improving work efficiency; secondly, when the calculation converges, the flow results can be read and the node voltage after the disconnection element can be obtained, which provides an accurate data basis for subsequent voltage safety analysis. This data screening process based on the stability of the results ensures the accuracy and reliability of the analysis, because only those data that pass the convergence test will be used in subsequent steps, thereby enhancing the robustness and practicality of the entire voltage safety verification method. This method not only optimizes the use of computing resources by excluding data that may cause errors at an early stage, but also improves the quality of the overall analysis process, which is crucial to ensuring the stable operation of the power grid and preventing potential power supply problems.

[0112] S05: Compare the voltages of all nodes in the partition to be checked with the initial node voltage set, and calculate the voltage deviation and voltage over-limit situation of each node voltage to obtain a fault voltage over-limit table; wherein the fault voltage over-limit table records each bus name, each over-limit type and each deviation rate of each node over-limit voltage.

[0113] As a preferred embodiment of the first embodiment, the voltages of all nodes in the partition to be checked are compared with the initial node voltage set, and the voltage deviation and voltage over-limit of each node voltage are calculated to obtain a fault voltage over-limit table, which is specifically:

[0114] For the node voltage set Vset, add the post-fault voltage U obtained by the above steps, calculate the voltage deviation △U=U-U0, for nodes exceeding the voltage upper limit Umax, the over-limit type is recorded as "over-upper limit", and the voltage over-limit rate (%)=(U-Umax) / Umax*100 is calculated; for nodes below the voltage lower limit Umin, the over-limit type is recorded as "over-lower limit", and the voltage over-limit rate (%)=(Umin-U) / Umin*100 is calculated. The over-limit situation and voltage deviation are recorded to obtain the fault voltage over-limit table, as shown in Figure 4 shown.

[0115] In this preferred embodiment, the present application adds the node voltage U obtained after the fault to the node voltage set Vset, and calculates the deviation △U from the initial voltage U0. This method can accurately quantify the voltage change of the power grid after a component disconnection fault. The beneficial effect of this step is that it not only provides a direct assessment of the stability of the power grid, but also, by calculating the voltage over-limit rate, can specifically identify the nodes that exceed the voltage upper limit Umax and are lower than the voltage lower limit Umin, record them as "over the upper limit" and "over the lower limit", and calculate the corresponding voltage over-limit rate. This quantitative over-limit analysis enables power grid operators to quickly identify those areas that are most likely to be affected in the event of a fault, so as to take preventive or remedial measures. These over-limit conditions and voltage deviations are recorded and organized into a fault voltage over-limit table, such as Figure 4 As shown, it provides valuable data support for the operation and maintenance of the power grid, making the power grid management more scientific and accurate, and improving the understanding and control capabilities of the dynamic response of the power grid. This method significantly enhances the depth and breadth of power grid fault analysis by providing detailed voltage deviation and over-limit data, and provides strong data support for ensuring the safe and stable operation of the power grid.

[0116] As a preferred embodiment of the first embodiment, the overall process of voltage verification is as follows: Figure 5 As shown. By acquiring the flow data file and the disconnection component set, the present application can fully identify the components and their connection relationships in the power grid, laying a data foundation for subsequent simulation analysis. By acquiring the flow data file and the disconnection component set, the present application provides a detailed data foundation for the static voltage safety verification of the power grid. Next, the flow data file is simulated using the flow calculation program to obtain the initial node voltage set of the partition to be verified, which establishes a benchmark for the voltage distribution of the power grid under normal conditions. Then, by disconnecting and simulating each component in the disconnection component set one by one, the method can simulate the performance of the power grid under different fault conditions and obtain each simulation calculation result. By judging whether these simulation calculation results converge, the present application ensures the reliability of the simulation results. If converged, the voltage of all nodes in the partition to be verified is read. Finally, these node voltages are compared with the initial node voltage set, and the voltage deviation and voltage over-limit of each node voltage are calculated to obtain the fault voltage over-limit table. This step can accurately identify and record the voltage abnormality caused by the fault in the power grid. This application can provide key voltage safety information to grid operators by systematically analyzing the voltage changes of the grid under normal and fault conditions, so that timely measures can be taken to prevent potential voltage instability and power outages, enhance the reliability and safety of the grid, and solve the problem in the existing technology that a large number of voltages in the power system cannot be efficiently calibrated.

[0117] Embodiment 2

[0118] Please refer to Figure 6 , which is a static voltage calibration device provided in an embodiment of the present application.

[0119] In this embodiment, the static voltage verification device includes an acquisition module 10 , a first simulation module 20 , a second simulation module 30 , a judgment module 40 and a verification module 50 .

[0120] The acquisition module 10 is used to acquire a power flow data file and a breaking component set.

[0121] As a preferred embodiment of the second embodiment, the process of obtaining the breaking element set is specifically as follows:

[0122] (1) Read the power flow file in step S1 line by line, and determine whether the 1st to 2nd columns of the read line are "B", and whether the partition name in the 19th to 20th columns is the partition to be verified;

[0123] (2) If no, perform the operation of step (1) on the next line in the power flow file; if yes, record the bus name (columns 7 to 14) and reference voltage (columns 15 to 18) in the data of the line;

[0124] (3) Repeat (1) to (2) until all rows are read and judged, and generate a data table Tbus of all nodes in the partition to be checked. Each node is uniquely identified by the bus name and bus voltage.

[0125] (4) Read the power flow file in step S1 line by line, and determine whether the first to second columns of the read line are "L" (representing a line branch) or "T" (representing a transformer branch), and execute one of (5) to (7) according to the determination result;

[0126] (5) If the 1st to 2nd columns of the current row are "L", extract the bus name 1 (columns 7 to 14) and reference voltage 1 (columns 15 to 18) at the head end of the row, and the bus name 2 (columns 20 to 27) and reference voltage 2 (columns 28 to 31) at the end, and determine whether one of the two is in the Tbus generated in (3) (one end of the line may be in another partition). If so, record the bus names and reference voltages at both ends of the line, as well as the row number of the row, and add them to the disconnection element set Eset;

[0127] (6) If the 1st to 2nd columns of the current row are "T", extract the first end bus name 1 (columns 7 to 14) and reference voltage 1 (columns 15 to 18), the end bus name 2 (columns 20 to 27) and reference voltage 2 (columns 28 to 31) of the row, and determine whether these two are in the Tbus generated by (3) (both ends of the transformer should be in the same partition). If so, record the bus name and reference voltage at both ends of the transformer branch, as well as the row number of the row, and add them to the disconnection element set Eset;

[0128] (7) If the first and second columns of the current row are neither "L" nor "T", execute (4) until all rows are read and the disconnection element set is obtained.

[0129] In this preferred embodiment, the present application first obtains all components and connection nodes in the power grid according to the flow data file, providing a comprehensive data basis for subsequent screening. Then, each component and its connection node are screened out according to the preset screening conditions, and further focus on the key parts that need to be analyzed. Then, the corresponding record lines of these components and nodes in the flow file are identified and the identification is added to obtain the disconnection component set, which enables these components to be quickly and accurately located and processed in the subsequent analysis process. Compared with the traditional method of manually selecting components from a large amount of data, this method is more efficient and accurate, avoiding omissions and errors that may be caused by manual operation, thereby providing reliable data preparation for subsequent flow calculations and voltage safety verification, helping to improve the efficiency and accuracy of the entire static voltage safety verification process, and reducing the workload of computer personnel as well as time and labor costs.

[0130] The first simulation module 20 is used to simulate the power flow data file according to the power flow calculation program to obtain an initial node voltage set of the partition to be verified.

[0131] As a preferred embodiment of the second embodiment, the power flow data file is simulated according to the power flow calculation program to obtain the initial node voltage set of the partition to be checked, specifically:

[0132] Call the BPA power flow calculation program PFNT.exe to simulate the power flow data file and obtain the power flow result file;

[0133] Read the power flow result file to obtain the initial voltage U0 of the node in the partition to be checked;

[0134] Determine whether the initial voltage exceeds the limit. For nodes exceeding the voltage upper limit Umax, the limit-exceeding type is recorded as "over the upper limit", and the voltage limit-exceeding rate (%) is calculated as (U0-Umax) / Umax*100; for nodes below the voltage lower limit Umin, the limit-exceeding type is recorded as "over the lower limit", and the voltage limit-exceeding rate (%) is calculated as (Umin-U0) / Umin*100; the nodes whose initial voltage exceeds the limit are recorded in the "base state voltage limit-exceeding" table, and the "base state voltage limit-exceeding" table is as follows: Figure 2 As shown, the nodes do not participate in the subsequent voltage comparison; the nodes whose initial voltages do not exceed the limit have their initial voltages recorded to form a node voltage set Vset.

[0135] In this preferred embodiment, the present application simulates the power flow data file by calling the power flow calculation program PFNT.exe of BPA, and the method can accurately obtain the initial voltage distribution of the power grid under normal operating conditions. This step is crucial because it provides benchmark data for subsequent voltage safety analysis. Then, by reading the power flow result file and obtaining the initial voltage U0 of the partition node to be verified, the method can make a preliminary assessment of the voltage level of each node. Further, by judging whether the initial voltage exceeds the limit and calculating the voltage limit rate, the method can identify those nodes that have exceeded the safety range under normal operating conditions. These nodes are recorded in the "base voltage limit" table and will not participate in the subsequent voltage comparison, thereby ensuring the accuracy and efficiency of the analysis. For nodes whose initial voltage does not exceed the limit, their initial voltage is recorded to form a node voltage set Vset, which provides the necessary data basis for the subsequent disconnection simulation and voltage deviation analysis. This process infers that the method not only improves the automation of voltage safety analysis, but also ensures the accuracy of subsequent analysis and the safety of power grid operation by accurately identifying and excluding nodes with base voltage limit violations.

[0136] The second simulation module 30 is used to disconnect and simulate the components in the disconnect component set one by one according to the power flow calculation program to obtain various simulation calculation results.

[0137] As a preferred embodiment of the second embodiment, according to the power flow calculation program, each component in the breaking component set is disconnected one by one and simulated to obtain each simulation calculation result, which is specifically:

[0138] The obtained breaking component sets Eset are read one by one, and the lines of the power flow data file are commented out according to the number of the breaking component lines (a "." is added to the beginning of the line), and the power flow calculation program of BPA is called to perform simulation calculation on the power flow data file.

[0139] The judgment module 40 is used to judge whether the simulation calculation results are converged. If converged, the voltage of all nodes of the partition to be checked is read.

[0140] As a preferred embodiment of the second embodiment, the determination of whether the simulation calculation results converge, if converged, reading the voltages of all nodes of the partition to be checked, is specifically as follows:

[0141] Determine whether the calculation has converged based on the flow result file. If the calculation does not converge, record it in the "Calculation Failure Event" table, such as Figure 3 As shown; if the calculation converges, read the power flow results and obtain the node voltage after the disconnection element.

[0142] In this preferred embodiment, when the calculation does not converge, the application records these events in the "calculation failure event" table, such as Figure 3As shown in the figure, this can quickly identify and locate cases where problems occur during the simulation process, providing clear clues and references for further analysis and problem solving, thereby avoiding invalid analysis of problem data and improving work efficiency; secondly, when the calculation converges, the flow results can be read and the node voltage after the disconnection element can be obtained, which provides an accurate data basis for subsequent voltage safety analysis. This data screening process based on the stability of the results ensures the accuracy and reliability of the analysis, because only those data that pass the convergence test will be used in subsequent steps, thereby enhancing the robustness and practicality of the entire voltage safety verification method. This method not only optimizes the use of computing resources by excluding data that may cause errors at an early stage, but also improves the quality of the overall analysis process, which is crucial to ensuring the stable operation of the power grid and preventing potential power supply problems.

[0143] The verification module 50 is used to compare the voltages of all nodes in the partition to be verified with the initial node voltage set, and calculate the voltage deviation and voltage over-limit situation of each node voltage to obtain a fault voltage over-limit table; wherein the fault voltage over-limit table records the bus name, each over-limit type and each deviation rate of each node over-limit voltage.

[0144] As a preferred embodiment of the second embodiment, the voltages of all nodes in the partition to be checked are compared with the initial node voltage set, and the voltage deviation and voltage over-limit of each node voltage are calculated to obtain a fault voltage over-limit table, which is specifically:

[0145] For the node voltage set Vset, add the post-fault voltage U obtained by the above steps, calculate the voltage deviation △U=U-U0, for nodes exceeding the voltage upper limit Umax, the over-limit type is recorded as "over-upper limit", and the voltage over-limit rate (%)=(U-Umax) / Umax*100 is calculated; for nodes below the voltage lower limit Umin, the over-limit type is recorded as "over-lower limit", and the voltage over-limit rate (%)=(Umin-U) / Umin*100 is calculated. The over-limit situation and voltage deviation are recorded to obtain the fault voltage over-limit table, as shown in Figure 4 shown.

[0146] In this preferred embodiment, the present application adds the node voltage U obtained after the fault to the node voltage set Vset, and calculates the deviation △U from the initial voltage U0. This method can accurately quantify the voltage change of the power grid after a component disconnection fault. The beneficial effect of this step is that it not only provides a direct assessment of the stability of the power grid, but also, by calculating the voltage over-limit rate, can specifically identify the nodes that exceed the voltage upper limit Umax and are lower than the voltage lower limit Umin, record them as "over the upper limit" and "over the lower limit", and calculate the corresponding voltage over-limit rate. This quantitative over-limit analysis enables power grid operators to quickly identify those areas that are most likely to be affected in the event of a fault, so as to take preventive or remedial measures. These over-limit conditions and voltage deviations are recorded and organized into a fault voltage over-limit table, such as Figure 4 As shown, it provides valuable data support for the operation and maintenance of the power grid, making the power grid management more scientific and accurate, and improving the understanding and control capabilities of the dynamic response of the power grid. This method significantly enhances the depth and breadth of power grid fault analysis by providing detailed voltage deviation and over-limit data, and provides strong data support for ensuring the safe and stable operation of the power grid.

[0147] As a preferred embodiment of the second embodiment, the overall process of voltage verification is as follows: Figure 5 As shown. By acquiring the flow data file and the disconnection component set, the present application can fully identify the components and their connection relationships in the power grid, laying a data foundation for subsequent simulation analysis. By acquiring the flow data file and the disconnection component set, the present application provides a detailed data foundation for the static voltage safety verification of the power grid. Next, the flow data file is simulated using the flow calculation program to obtain the initial node voltage set of the partition to be verified, which establishes a benchmark for the voltage distribution of the power grid under normal conditions. Then, by disconnecting and simulating each component in the disconnection component set one by one, the method can simulate the performance of the power grid under different fault conditions and obtain each simulation calculation result. By judging whether these simulation calculation results converge, the present application ensures the reliability of the simulation results. If converged, the voltage of all nodes in the partition to be verified is read. Finally, these node voltages are compared with the initial node voltage set, and the voltage deviation and voltage over-limit of each node voltage are calculated to obtain the fault voltage over-limit table. This step can accurately identify and record the voltage abnormality caused by the fault in the power grid. This application can provide key voltage safety information to grid operators by systematically analyzing the voltage changes of the grid under normal and fault conditions, so that timely measures can be taken to prevent potential voltage instability and power outages, enhance the reliability and safety of the grid, and solve the problem in the existing technology that a large number of voltages in the power system cannot be efficiently calibrated.

[0148] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. It is particularly pointed out that for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A static voltage calibration method, characterized in that: include: Obtain power flow data files and disconnection component sets; According to the power flow calculation program, the power flow data file is simulated to obtain the initial node voltage set of the partition to be checked; According to the power flow calculation program, each component in the breaking component set is disconnected one by one and simulated to obtain each simulation calculation result; Determine whether the simulation calculation results are converged, and if so, read the voltages of all nodes of the partition to be checked; The voltages of all nodes in the partition to be checked are compared with the initial node voltage set, and the voltage deviation and voltage over-limit situation of each node voltage are calculated to obtain a fault voltage over-limit table; wherein the fault voltage over-limit table records each bus name, each over-limit type and each deviation rate of each node over-limit voltage.

2. The static voltage verification method according to claim 1, characterized in that: The acquisition of the power flow data file and the breaking component set is specifically as follows: According to the power flow data file, all nodes and all line branches and transformer branches in the power grid are obtained; According to the preset screening conditions, all nodes and all line branches and transformer branches, the nodes, line branches and transformer branches of the partition to be checked are screened; The corresponding record rows of the line branch and the transformer branch in the power flow file are identified, the bus name and the reference voltage at both ends of the branch, and the row number of the row are recorded, and a breaking component set is obtained.

3. The static voltage verification method according to claim 1, characterized in that: According to the power flow calculation program, the power flow data file is simulated to obtain the initial node voltage set of the partition to be checked, specifically: According to the power flow calculation program, the power flow data file is simulated to obtain the initial voltage of the partition node to be checked; According to a first preset threshold, determining whether each initial voltage of all the components exceeds a limit; If the initial voltage of the component is greater than a first preset threshold, confirming that the initial voltage of the component exceeds an upper limit; According to a second preset threshold, determining whether each initial voltage of all the components exceeds a limit; If the initial voltage of the component is less than a second preset threshold, confirming that the initial voltage of the component exceeds a lower limit; If the initial voltage of the component is neither greater than the first preset threshold nor less than the second preset threshold, confirming that the initial voltage of the component is within the limit; An initial node voltage set is obtained according to the initial voltages that do not exceed the limit.

4. The static voltage verification method according to claim 1, characterized in that: The components in the breaking component set are disconnected one by one, and the power flow calculation program is called to simulate the power flow data file to obtain the voltage of the partition node to be checked, which is compared with the initial node voltage set, and the voltage deviation and voltage over-limit situation of each node voltage are calculated to obtain the fault voltage over-limit table, which is specifically: Subtract the node voltage of the partition to be checked obtained by simulation calculation after disconnecting one component each time from the initial voltage of the corresponding node in the node voltage set to obtain the voltage deviation of each node voltage of the partition to be checked; If the node voltage of the component is greater than a first preset threshold, it is confirmed that the post-fault voltage of the component exceeds an upper limit; If the node voltage of the component is less than a second preset threshold, confirming that the post-fault voltage of the component exceeds a lower limit; According to the voltage deviation and over-limit type of each node, a fault voltage over-limit table is obtained.

5. The static voltage verification method according to claim 4, characterized in that: If the node voltage of the component is greater than the first preset threshold, the post-fault voltage of the component exceeds the upper limit, further comprising: According to the node voltage of the element, the first preset threshold value and the first formula, a voltage exceeding the upper limit rate of the node whose voltage exceeds the upper limit is calculated; The first formula is Ui=(U-Umax) / Umax*100; Wherein, Umax is the first preset threshold, U is the node voltage that exceeds the upper limit, and Ui is the voltage exceeding the upper limit rate.

6. The static voltage verification method according to claim 4, characterized in that: If the node voltage of the component is less than the second preset threshold, the post-fault voltage of the component is lower than the lower limit, further comprising: According to the node voltage of the element, the second preset threshold value and the second formula, a voltage lower limit rate of the node whose voltage is lower than the lower limit is calculated; The second formula is Ui=(Umin-U) / Umin*100; Wherein, Umin is the second preset threshold, U is the node voltage that exceeds the lower limit, and Ui is the voltage lower limit rate.

7. A static voltage calibration device, characterized in that: It includes an acquisition module, a first simulation module, a second simulation module, a judgment module and a verification module; The acquisition module is used to obtain the power flow data file and the breaking component set; The first simulation module is used to simulate the power flow data file according to the power flow calculation program to obtain an initial node voltage set; The second simulation module is used to disconnect and simulate the components in the disconnect component set one by one according to the power flow calculation program to obtain various simulation calculation results; The judgment module is used to judge whether the simulation calculation results are converged. If converged, the voltage of all nodes of the partition to be checked is read; The verification module is used to compare the node voltage of the partition to be verified obtained by simulation calculation after each component is disconnected with the initial voltage of the corresponding node in the node voltage set, and calculate the voltage deviation and voltage over-limit situation of each node voltage to obtain a fault voltage over-limit table; wherein the fault voltage over-limit table records the bus name, over-limit type and voltage deviation rate of the partition node to be verified.

8. The static voltage calibration device according to claim 7, characterized in that: The acquisition of the power flow data file and the breaking component set is specifically as follows: According to the power flow data file, all nodes and all line branches and transformer branches in the power grid are obtained; According to the preset screening conditions, all nodes and all line branches and transformer branches, the nodes, line branches and transformer branches of the partition to be checked are screened; The corresponding record rows of the line branch and the transformer branch in the power flow file are identified, the bus name and the reference voltage at both ends of the branch, and the row number of the row are recorded, and a breaking component set is obtained.

9. The static voltage calibration device according to claim 7, characterized in that: According to the power flow calculation program, the power flow data file is simulated to obtain the initial node voltage set of the partition to be checked, specifically: According to the power flow calculation program, the power flow data file is simulated to obtain the initial voltage of the partition node to be checked; According to a first preset threshold, determining whether each initial voltage of all the components exceeds a limit; If the initial voltage of the component is greater than a first preset threshold, confirming that the initial voltage of the component exceeds an upper limit; According to a second preset threshold, determining whether each initial voltage of all the components exceeds a limit; If the initial voltage of the component is less than a second preset threshold, confirming that the initial voltage of the component exceeds a lower limit; If the initial voltage of the component is neither greater than the first preset threshold nor less than the second preset threshold, confirming that the initial voltage of the component is within the limit; An initial node voltage set is obtained according to the initial voltages that do not exceed the limit.

10. The static voltage calibration device according to claim 7, characterized in that: The components in the breaking component set are disconnected one by one, and the power flow calculation program is called to simulate the power flow data file, the voltage of the partition node to be checked is obtained, and compared with the initial node voltage set, and the voltage deviation and voltage over-limit of each node voltage are calculated to obtain the fault voltage over-limit table, which is specifically: Subtract the node voltage of the partition to be checked obtained by simulation calculation after disconnecting one component each time from the initial voltage of the corresponding node in the node voltage set to obtain the voltage deviation of each node voltage of the partition to be checked; If the node voltage of the component is greater than a first preset threshold, it is confirmed that the post-fault voltage of the component exceeds an upper limit; If the node voltage of the component is less than a second preset threshold, confirming that the post-fault voltage of the component exceeds a lower limit; According to the voltage deviation and over-limit type of each node, a fault voltage over-limit table is obtained.

11. The static voltage calibration device according to claim 10, characterized in that: If the node voltage of the component is greater than the first preset threshold, the post-fault voltage of the component exceeds the upper limit, further comprising: According to the node voltage of the element, the first preset threshold value and the first formula, a voltage exceeding the upper limit rate of the node whose voltage exceeds the upper limit is calculated; The first formula is Ui=(U-Umax) / Umax*100; Wherein, Umax is the first preset threshold, U is the node voltage that exceeds the upper limit, and Ui is the voltage exceeding the upper limit rate.

12. The static voltage calibration device according to claim 10, characterized in that: If the node voltage of the component is less than the second preset threshold, the post-fault voltage of the component is lower than the lower limit, further comprising: According to the node voltage of the element, the second preset threshold value and the second formula, a voltage lower limit rate of the node whose voltage is lower than the lower limit is calculated; The second formula is Ui=(Umin-U) / Umin*100; Wherein, Umin is the second preset threshold, U is the node voltage that exceeds the lower limit, and Ui is the voltage lower limit rate.

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