Method and device for evaluating post-earthquake operation state of power grid

Abstract

The invention discloses a power grid post-earthquake operation state evaluation method and device, and the method comprises the steps: obtaining the three-dimensional environment data of a target region and the type of key facilities of a power grid through a remote sensing technology and a geographic information system, and obtaining the three-dimensional environment data of the target region and the type of the key facilities of the power grid according to the three-dimensional environment data of the target region and the type of the key facilities; generating a three-dimensional environment model of the target area, and determining a topological relation of the key facilities of the power grid based on the three-dimensional environment model; acquiring peak ground acceleration and earthquake intensity of the target area, and determining a response result of the power grid key facility under the earthquake action according to the peak ground acceleration and the earthquake intensity; determining an anti-seismic index of the power grid key facility according to the response result; and determining the operation state of the power grid line according to the topological relation of the power grid key facilities and the anti-seismic indexes of the power grid key facilities. According to the invention, the comprehensiveness of the judgment basis of the power grid operation condition and the accuracy of power grid fault identification can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of post-earthquake evaluation of power systems, and in particular to a method and device for evaluating the operating status of a power grid after an earthquake. Background Art

[0002] This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. No statement herein is admitted to be prior art by virtue of its inclusion in this section.

[0003] Earthquakes typically have multifaceted impacts on human society. For power infrastructure, earthquakes not only damage equipment and break lines, but can also trigger chain reactions, leading to larger-scale power outages. Remote sensing technology and geographic information systems (GIS) have gradually developed and are increasingly being used in earthquake management. However, traditional resource allocation often relies on empirical judgment and lacks scientific and systematic approaches. Existing technologies only use a single indicator to determine the post-disaster operation of the power grid, resulting in an incomplete assessment of the grid's operating status, low accuracy in identifying post-disaster faults, and an inability to provide subsequent support for post-disaster grid recovery. Summary of the Invention

[0004] An embodiment of the present invention provides a method for evaluating the post-earthquake operating status of a power grid, which is used to improve the comprehensiveness of the basis for judging the power grid operating status, enhance the accuracy of post-disaster fault identification, and provide support for post-disaster power grid recovery. The method includes:

[0005] Using remote sensing technology and geographic information systems, we acquire three-dimensional environmental data of the target area and the types of key grid facilities. The three-dimensional environmental data includes the area, elevation, and topography of the target area. Key grid facilities include towers and transformers.

[0006] Generate a 3D environmental model of the target area based on the 3D environmental data of the target area and the types of key grid facilities. Based on the 3D environmental model, determine the topological relationships of the key grid facilities. The topological relationships of the key grid facilities include series and parallel relationships.

[0007] Under the action of an earthquake, the peak ground acceleration and earthquake intensity of the target area are obtained, and based on the peak ground acceleration and earthquake intensity, the response results of key power grid facilities under the action of the earthquake are determined;

[0008] On the basis that the seismic resistance index of the key power grid facilities obeys a normal distribution, determining the seismic resistance index of the key power grid facilities according to the response results;

[0009] The operating status of the power grid lines is determined based on the topological relationship of the key power grid facilities and the seismic resistance indicators of the key power grid facilities.

[0010] The present invention also provides a device for evaluating the post-earthquake operating status of a power grid, which is used to improve the comprehensiveness of the basis for judging the power grid operating status, enhance the accuracy of post-disaster fault identification, and provide support for post-disaster power grid recovery. The device includes:

[0011] The module for acquiring 3D environmental data and key grid facility types is used to acquire 3D environmental data and key grid facility types of the target area through remote sensing technology and geographic information systems. The 3D environmental data includes the area, elevation, and topography of the target area. Key grid facility types include towers and transformers.

[0012] A module for determining the topological relationship of key grid facilities is used to generate a three-dimensional environmental model of the target area based on the three-dimensional environmental data of the target area and the type of key grid facilities. Based on the three-dimensional environmental model, the module determines the topological relationship of key grid facilities. The topological relationship of key grid facilities includes series and parallel relationships.

[0013] The earthquake response result determination module is used to obtain the peak ground acceleration and earthquake intensity of the target area under the action of the earthquake, and determine the response results of the key power grid facilities under the action of the earthquake based on the peak ground acceleration and earthquake intensity;

[0014] An earthquake resistance index determination module, configured to determine the earthquake resistance index of the key power grid facilities according to the response results, on the basis that the earthquake resistance index of the key power grid facilities obeys a normal distribution;

[0015] The power grid line operation status determination module is used to determine the operation status of the power grid line according to the topological relationship of the key power grid facilities and the seismic resistance indicators of the key power grid facilities.

[0016] An embodiment of the present invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned method for evaluating the post-earthquake operating status of the power grid is implemented.

[0017] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the computer program implements the above-mentioned method for evaluating the post-earthquake operating status of a power grid.

[0018] An embodiment of the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the above-mentioned method for evaluating the post-earthquake operating status of the power grid.

[0019] In an embodiment of the present invention, three-dimensional environmental data and types of key grid facilities of a target area are acquired through remote sensing technology and a geographic information system, the three-dimensional environmental data including area data, elevation data, and topographic data of the target area; types of key grid facilities include towers and transformers; a three-dimensional environmental model of the target area is generated based on the three-dimensional environmental data and types of key grid facilities of the target area, and the topological relationship of the key grid facilities is determined based on the three-dimensional environmental model; the topological relationship of the key grid facilities includes a series relationship and a parallel relationship; under the action of an earthquake, the peak ground acceleration and earthquake intensity of the target area are acquired, and the response results of the key grid facilities under the action of the earthquake are determined based on the peak ground acceleration and earthquake intensity; on the basis that the seismic resistance index of the key grid facilities obeys a normal distribution, the seismic resistance index of the key grid facilities is determined based on the response results; and the operating status of the grid line is determined based on the topological relationship of the key grid facilities and the seismic resistance index of the key grid facilities. In the above process, the embodiment of the present invention takes into account the series-parallel topological relationship of the key facilities of the power grid, and determines the seismic resistance indicators of the key facilities of the power grid based on the response results under the action of the earthquake. It further analyzes the operating status of the overall power grid line in combination with the topological relationship of the key facilities of the power grid, determines whether the power grid lines in the disaster area are in a normal power transmission operating state, improves the comprehensiveness of the basis for judging the power grid operating status and the accuracy of power grid fault identification, ensures that measures can be taken quickly when an earthquake occurs, and provides support for the recovery of the power grid after the disaster. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 Flowchart of a method for evaluating the post-earthquake operating status of a power grid according to an embodiment of the present invention;

[0022] Figure 2 A flowchart of determining the response results of key power grid facilities under earthquake action in an embodiment of the present invention;

[0023] Figure 3 This is a flow chart of determining the operating status of a power grid line in an embodiment of the present invention;

[0024] Figure 4 Schematic diagram of a device for evaluating the post-earthquake operating status of a power grid according to an embodiment of the present invention;

[0025] Figure 5 Schematic diagram of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0027] The acquisition, storage, use, and processing of data in this application's technical solution comply with relevant national laws and regulations.

[0028] Figure 1 Flowchart of a method for evaluating the post-earthquake operating status of a power grid according to an embodiment of the present invention. The method includes:

[0029] Step 101: Acquire three-dimensional environmental data of a target area and types of key grid facilities using remote sensing technology and a geographic information system. The three-dimensional environmental data includes area data, elevation data, and topographic data of the target area. Key grid facilities include towers and transformers.

[0030] Step 102: Generate a three-dimensional environmental model of the target area based on the three-dimensional environmental data of the target area and the types of key grid facilities. Based on the three-dimensional environmental model, determine the topological relationship of the key grid facilities. The topological relationship of the key grid facilities includes a series relationship and a parallel relationship.

[0031] Step 103: Under the action of the earthquake, the peak ground acceleration and the earthquake intensity of the target area are obtained, and the response results of the key power grid facilities under the action of the earthquake are determined based on the peak ground acceleration and the earthquake intensity;

[0032] Step 104, determining the seismic resistance index of the key power grid facilities according to the response result, based on the seismic resistance index of the key power grid facilities obeying a normal distribution;

[0033] Step 105 : determining the operating status of the power grid lines according to the topological relationship of the key power grid facilities and the seismic resistance index of the key power grid facilities.

[0034] Each step is described in detail below.

[0035] In step 101, three-dimensional environmental data and types of key grid facilities of the target area are obtained through remote sensing technology and geographic information systems. The three-dimensional environmental data includes area data, elevation data and topography data of the target area; the types of key grid facilities include towers and transformers.

[0036] In a specific embodiment, before obtaining relevant data and information, a comprehensive display platform for transmission line disaster analysis and early warning is constructed by combining images of the power grid's transmission lines and transmission corridors, terrain information, and administrative area information to realize functions such as data display, multi-source data processing, and support.

[0037] In step 102, a three-dimensional environmental model of the target area is generated based on the three-dimensional environmental data of the target area and the type of key grid facilities. Based on the three-dimensional environmental model, the topological relationship of the key grid facilities is determined; the topological relationship of the key grid facilities includes a series relationship and a parallel relationship.

[0038] In a specific embodiment, the steps for generating a three-dimensional environment model are as follows:

[0039] Step 1: Obtain three-dimensional environmental information of the target area based on remote sensing technology and geographic information system, including regional area, elevation, landform and other information.

[0040] Step 2: Statistically analyze the power grid facility information within the target area, including coordinates, elevation, type, etc.

[0041] Step 3: Determine the earthquake intensity in the target area based on the forecast information from the seismic network.

[0042] Step 4: Based on the 3D environmental information in step 1, use numerical simulation software such as QUAKE / W and CRUST to build a 3D environmental model of the target area, divide the grid, and set the simulation boundary conditions.

[0043] In step 103, under the action of an earthquake, the peak ground acceleration and the earthquake intensity of the target area are obtained, and the response results of the key power grid facilities under the action of the earthquake are determined based on the peak ground acceleration and the earthquake intensity.

[0044] Figure 2 This is a flow chart of determining the response of key grid facilities to an earthquake in an embodiment of the present invention. In one embodiment, under an earthquake, the peak ground acceleration and earthquake intensity of a target area are obtained, and the response of the key grid facilities to the earthquake is determined based on the peak ground acceleration and earthquake intensity, including:

[0045] Step 201: Obtain the peak ground acceleration of the target area and determine the earthquake intensity based on the peak ground acceleration;

[0046] Step 202: Determine the acceleration response spectrum value based on the earthquake intensity, peak ground acceleration, and structural period of key power grid facilities;

[0047] Step 203: Determine the response results of key grid facilities under earthquake action based on the acceleration response spectrum values.

[0048] In one embodiment, the response of key grid facilities under earthquake action is calculated according to the following formula:

[0049] R s =S a (T,ξ)·G

[0050] Among them, R s is the response result of key power grid facilities under earthquake action, S a (T,ξ) is the acceleration response spectrum value, which is equal to the product of the peak ground acceleration a and the earthquake action function F(T,ξ), where T is the structural period, ξ is the damping ratio, and G is the structural geometry material property function of the key power grid facilities.

[0051] In the specific embodiment, G=1. Here, the acceleration response spectrum value S a (T,ξ) is the initial acceleration response spectrum value S a (T) Damping correction coefficient obtained after damping correction S a (T,ξ)=S a (T)·η;S a The calculation formula for (T) is:

[0052]

[0053] Where a is the peak ground acceleration, T is the structural period, and T g is the site characteristic period, γ is the attenuation coefficient, T g The values of and γ refer to the Code for Seismic Design of Buildings GB 50011.

[0054] When the key power grid facility is a tower, the structural period T is calculated using the empirical formula:

[0055] T=C·H α

[0056] Where H is the structure height, C and α are empirical coefficients, such as C = 0.085 and α = 0.75 for a steel tower.

[0057] When the key facility of the power grid is a transformer, the structural period T is calculated using the conversion relationship between period and frequency:

[0058]

[0059] Where f is the fundamental frequency of the transformer bracket.

[0060] In step 104, on the basis that the seismic resistance index of the key power grid facilities obeys a normal distribution, the seismic resistance index of the key power grid facilities is determined according to the response result.

[0061] In one embodiment, on the basis that the seismic resistance index of the key power grid facilities obeys a normal distribution, determining the seismic resistance index of the key power grid facilities according to the response results includes:

[0062] Calculate the seismic resistance index of key power grid facilities according to the following formula:

[0063]

[0064] Among them, R(a) is the seismic resistance index, φ is the cumulative distribution function of the standard normal distribution, R s is the response of key grid facilities under earthquake action, μ c is the mean value, σ c is the variance, μ c , σ c Determined through experiments or historical earthquake resistance indicators.

[0065] In step 105, the operating status of the power grid lines is determined based on the topological relationship of the key power grid facilities and the seismic resistance indicators of the key power grid facilities.

[0066] Figure 3 This is a flow chart of determining the operating status of a power grid line in an embodiment of the present invention. In one embodiment, determining the operating status of a power grid line based on the topological relationship of key power grid facilities and the seismic resistance index of the key power grid facilities includes:

[0067] Step 301, comparing the earthquake resistance index of the key power grid facilities with a preset earthquake resistance index threshold;

[0068] Step 302: When the earthquake resistance index is greater than a preset earthquake resistance index threshold, the operation state of the key power grid facility is determined to be normal; when the earthquake resistance index is less than or equal to the preset earthquake resistance index threshold, the operation state of the key power grid facility is determined to be a fault state;

[0069] Step 303: Determine the operating status of the power grid lines according to the topological relationship of the key power grid facilities and the operating status of the key power grid facilities.

[0070] In a specific embodiment, the normal operation of power lines is determined based on the series and parallel connections between power grid facilities, such as towers and transformers. A redundant reliability model is used for parallel lines. If the failure rate of the parallel lines in the power grid is lower than a preset value, the entire line is considered normal. A chain reliability model is used for series lines. If a failure occurs at any node, the line is considered abnormal. The overall operating status of the power grid lines is analyzed by analyzing the seismic resistance indicators of key power grid facilities and combining them with the topological relationships of these key power grid facilities. This provides additional basis for determining the power grid's operating status and improves the comprehensiveness of the basis for determining the power grid's operating status.

[0071] The present invention also provides a device for evaluating the post-earthquake operating status of a power grid, as described in the following embodiments. Because the principles underlying the problem solved by this device are similar to those of the post-earthquake power grid operating status evaluation method, the implementation of this device can be referenced to the implementation of the post-earthquake power grid operating status evaluation method, and any repetitions will not be repeated.

[0072] Figure 4Schematic diagram of a device for evaluating the post-earthquake operating status of a power grid according to an embodiment of the present invention, the device comprising:

[0073] 3D environmental data and grid key facility type acquisition module 401 is used to acquire 3D environmental data and grid key facility types of a target area using remote sensing technology and geographic information systems. The 3D environmental data includes area data, elevation data, and topographic data of the target area. The grid key facility types include towers and transformers.

[0074] The topological relationship determination module 402 for key grid facilities is configured to generate a three-dimensional environmental model of the target area based on the three-dimensional environmental data of the target area and the type of key grid facilities, and to determine the topological relationship of the key grid facilities based on the three-dimensional environmental model; the topological relationship of the key grid facilities includes a series relationship and a parallel relationship;

[0075] The earthquake response result determination module 403 is used to obtain the peak ground acceleration and earthquake intensity of the target area under the action of the earthquake, and determine the response results of the key power grid facilities under the action of the earthquake based on the peak ground acceleration and earthquake intensity;

[0076] A seismic index determination module 404 is configured to determine the seismic index of the key power grid facilities according to the response results, based on the fact that the seismic index of the key power grid facilities obeys a normal distribution;

[0077] The power grid line operation state determination module 405 is used to determine the operation state of the power grid line according to the topological relationship of the key power grid facilities and the seismic resistance index of the key power grid facilities.

[0078] In one embodiment, the earthquake response result determination module 403 is specifically configured to:

[0079] Obtain the peak ground acceleration of the target area and determine the earthquake intensity based on the peak ground acceleration;

[0080] Determine the acceleration response spectrum value based on the earthquake intensity, peak ground acceleration, and structural period of key power grid facilities;

[0081] Based on the acceleration response spectrum value, the response results of key power grid facilities under earthquake action are determined.

[0082] In one embodiment, the earthquake response result determination module 403 is specifically configured to:

[0083] The response results of key power grid facilities under earthquake action are calculated according to the following formula:

[0084] R s =S a (T,ξ)·G

[0085] Among them, R sis the response result of key power grid facilities under earthquake action, S a (T,ξ) is the acceleration response spectrum value, which is equal to the product of the peak ground acceleration a and the earthquake action function F(T,ξ), where T is the structural period, ξ is the damping ratio, and G is the structural geometry material property function of the key power grid facilities.

[0086] In one embodiment, the earthquake resistance index determination module 404 is specifically configured to:

[0087] Calculate the seismic resistance index of key power grid facilities according to the following formula:

[0088]

[0089] Among them, R(a) is the seismic resistance index, φ is the cumulative distribution function of the standard normal distribution, R s is the response of key grid facilities under earthquake action, μ c is the mean value, σ c is the variance, μ c , σ c Determined through experiments or historical earthquake resistance indicators.

[0090] In one embodiment, the power grid line operating state determination module 405 is specifically configured to:

[0091] Compare the seismic resistance index of key power grid facilities with the preset seismic resistance index threshold;

[0092] When the seismic resistance index is greater than the preset seismic resistance index threshold, the operation state of the key power grid facilities is determined to be normal; when the seismic resistance index is less than or equal to the preset seismic resistance index threshold, the operation state of the key power grid facilities is determined to be a fault state;

[0093] The operating status of the power grid lines is determined based on the topological relationship and operating status of the key power grid facilities.

[0094] An embodiment of the present invention further provides a computer device, Figure 5 This is a schematic diagram of a computer device in an embodiment of the present invention. The computer device 500 includes a memory 510, a processor 520, and a computer program 530 stored in the memory 510 and executable on the processor 520. When the processor 520 executes the computer program 530, the above-mentioned method for evaluating the post-earthquake operating status of the power grid is implemented.

[0095] An embodiment of the present invention further provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the computer program implements the above-mentioned method for evaluating the post-earthquake operating status of a power grid.

[0096] An embodiment of the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the above-mentioned method for evaluating the post-earthquake operating status of the power grid.

[0097] In an embodiment of the present invention, three-dimensional environmental data and types of key grid facilities of a target area are acquired through remote sensing technology and a geographic information system, the three-dimensional environmental data including area data, elevation data, and topographic data of the target area; types of key grid facilities include towers and transformers; a three-dimensional environmental model of the target area is generated based on the three-dimensional environmental data and types of key grid facilities of the target area, and the topological relationship of the key grid facilities is determined based on the three-dimensional environmental model; the topological relationship of the key grid facilities includes a series relationship and a parallel relationship; under the action of an earthquake, the peak ground acceleration and earthquake intensity of the target area are acquired, and the response results of the key grid facilities under the action of the earthquake are determined based on the peak ground acceleration and earthquake intensity; on the basis that the seismic resistance index of the key grid facilities obeys a normal distribution, the seismic resistance index of the key grid facilities is determined based on the response results; and the operating status of the grid line is determined based on the topological relationship of the key grid facilities and the seismic resistance index of the key grid facilities. In the above process, the embodiment of the present invention takes into account the series-parallel topological relationship of the key facilities of the power grid, and determines the seismic resistance indicators of the key facilities of the power grid based on the response results under the action of the earthquake. It further analyzes the operating status of the overall power grid line in combination with the topological relationship of the key facilities of the power grid, determines whether the power grid lines in the disaster area are in a normal power transmission operating state, improves the comprehensiveness of the basis for judging the power grid operating status and the accuracy of power grid fault identification, ensures that measures can be taken quickly when an earthquake occurs, and provides support for the recovery of the power grid after the disaster.

[0098] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0099] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0100] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0101] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0102] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. 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. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for evaluating the post-earthquake operating status of a power grid, characterized in that: include: Using remote sensing technology and geographic information systems, we acquire three-dimensional environmental data of the target area and the types of key grid facilities. The three-dimensional environmental data includes the area, elevation, and topography of the target area. Key grid facilities include towers and transformers. Generate a 3D environmental model of the target area based on the 3D environmental data of the target area and the types of key grid facilities. Based on the 3D environmental model, determine the topological relationship of the key grid facilities. The topological relationship of the key grid facilities includes series and parallel relationships. Under the action of an earthquake, the peak ground acceleration and earthquake intensity of the target area are obtained, and based on the peak ground acceleration and earthquake intensity, the response results of key power grid facilities under the action of the earthquake are determined; On the basis that the seismic resistance index of the key power grid facilities obeys a normal distribution, determining the seismic resistance index of the key power grid facilities according to the response results; The operating status of the power grid lines is determined based on the topological relationship of the key power grid facilities and the seismic resistance indicators of the key power grid facilities.

2. The method according to claim 1, wherein Under the action of an earthquake, the peak ground acceleration and earthquake intensity of the target area are obtained. Based on the peak ground acceleration and earthquake intensity, the response results of key power grid facilities under the action of an earthquake are determined, including: Obtain the peak ground acceleration of the target area and determine the earthquake intensity based on the peak ground acceleration; Determine the acceleration response spectrum value based on the earthquake intensity, peak ground acceleration, and structural period of key power grid facilities; Based on the acceleration response spectrum value, the response results of key power grid facilities under earthquake action are determined.

3. The method according to claim 2, wherein The response results of key power grid facilities under earthquake action are calculated according to the following formula: R s =S a (T,ξ)·G Among them, R s is the response result of key power grid facilities under earthquake action, S a (T,ξ) is the acceleration response spectrum value, which is equal to the product of the peak ground acceleration a and the earthquake action function F(T,ξ), where T is the structural period, ξ is the damping ratio, and G is the structural geometry material property function of the key power grid facilities.

4. The method according to claim 3, wherein On the basis that the seismic resistance index of the key power grid facilities obeys a normal distribution, the seismic resistance index of the key power grid facilities is determined according to the response results, including: Calculate the seismic resistance index of key power grid facilities according to the following formula: Among them, R(a) is the seismic resistance index, φ is the cumulative distribution function of the standard normal distribution, R s is the response of key grid facilities under earthquake action, μ c is the mean value, σ c is the variance, μ c , σ c Determined through experiments or historical earthquake resistance indicators.

5. The method according to claim 1, wherein Determine the operating status of the power grid lines based on the topological relationship and seismic resistance indicators of the key power grid facilities, including: Compare the seismic resistance index of key power grid facilities with the preset seismic resistance index threshold; When the seismic resistance index is greater than the preset seismic resistance index threshold, the operation state of the key power grid facilities is determined to be normal; when the seismic resistance index is less than or equal to the preset seismic resistance index threshold, the operation state of the key power grid facilities is determined to be a fault state; The operating status of the power grid lines is determined based on the topological relationship and operating status of the key power grid facilities.

6. A device for evaluating the post-earthquake operating status of a power grid, characterized in that: include: The module for acquiring 3D environmental data and key grid facility types is used to acquire 3D environmental data and key grid facility types of the target area through remote sensing technology and geographic information systems. The 3D environmental data includes the area, elevation, and topography of the target area. Key grid facility types include towers and transformers. A module for determining the topological relationship of key grid facilities is used to generate a three-dimensional environmental model of the target area based on the three-dimensional environmental data of the target area and the type of key grid facilities. Based on the three-dimensional environmental model, the module determines the topological relationship of key grid facilities. The topological relationship of key grid facilities includes series and parallel relationships. The earthquake response result determination module is used to obtain the peak ground acceleration and earthquake intensity of the target area under the action of the earthquake, and determine the response results of the key power grid facilities under the action of the earthquake based on the peak ground acceleration and earthquake intensity; An earthquake resistance index determination module, configured to determine the earthquake resistance index of the key power grid facilities according to the response results, on the basis that the earthquake resistance index of the key power grid facilities obeys a normal distribution; The power grid line operation status determination module is used to determine the operation status of the power grid line according to the topological relationship of the key power grid facilities and the seismic resistance indicators of the key power grid facilities.

7. The device according to claim 6, characterized in that The earthquake response result determination module is specifically used to: Obtain the peak ground acceleration of the target area and determine the earthquake intensity based on the peak ground acceleration; Determine the acceleration response spectrum value based on the earthquake intensity, peak ground acceleration, and structural period of key power grid facilities; Based on the acceleration response spectrum value, the response results of key power grid facilities under earthquake action are determined.

8. The device according to claim 7, wherein The earthquake response result determination module is specifically used to: The response results of key power grid facilities under earthquake action are calculated according to the following formula: R s =S a (T,ξ)·G Among them, R s is the response result of key power grid facilities under earthquake action, S a (T,ξ) is the acceleration response spectrum value, which is equal to the product of the peak ground acceleration a and the earthquake action function F(T,ξ), where T is the structural period, ξ is the damping ratio, and G is the structural geometry material property function of the key power grid facilities.

9. The device according to claim 8, wherein The seismic index determination module is specifically used for: Calculate the seismic resistance index of key power grid facilities according to the following formula: Among them, R(a) is the seismic resistance index, φ is the cumulative distribution function of the standard normal distribution, R s is the response of key grid facilities under earthquake action, μ c is the mean value, σ c is the variance, μ c , σ c Determined through experiments or historical earthquake resistance indicators.

10. The device according to claim 6, wherein The power grid line operation status determination module is specifically used to: Compare the seismic resistance index of key power grid facilities with the preset seismic resistance index threshold; When the earthquake resistance index is greater than the preset earthquake resistance index threshold, the operation status of the key facilities of the power grid is determined to be normal; When the seismic resistance index is less than or equal to the preset seismic resistance index threshold, the operation state of the key power grid facilities is determined to be a fault state; The operating status of the power grid lines is determined based on the topological relationship and operating status of the key power grid facilities.

11. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method according to any one of claims 1 to 5 is implemented.

12. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

13. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

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