Line structure determination method and device, computer device, and storage medium

Abstract

The application relates to a line structure determination method and device, computer equipment and a storage medium, and relates to the field of power systems.The method comprises the following steps: according to a line fault set corresponding to each power transmission line in a power system, performing line extension planning on an initial line structure of the power system to obtain an extended line structure corresponding to the power system; determining a loss load value corresponding to the extended line structure under a line fault condition; and performing line reinforcement planning on the extended line structure according to the loss load value to obtain a target line structure corresponding to the power system.The application can effectively reduce resource input and effectively improve the resilience of the power system to disaster weather.

Description

Technical Field

[0001] This application relates to the field of power systems, and in particular to a method, apparatus, computer equipment, and storage medium for determining line structure. Background Technology

[0002] With the increasing frequency of extreme weather events in recent years, more and more power systems are being damaged due to the impact of extreme weather. In order to reduce the threat posed by extreme weather to power systems, reinforcement schemes can be adopted to strengthen the power systems and reduce the degree of damage caused by extreme weather.

[0003] However, after using existing reinforcement solutions to reinforce the power system, it will affect the subsequent equipment expansion and scale expansion of the power system, which is not conducive to the future development of the power system. Summary of the Invention

[0004] Therefore, it is necessary to provide a method, apparatus, computer equipment, and storage medium for determining line structure that can effectively improve the disaster response capability of power systems, addressing the aforementioned technical problems.

[0005] Firstly, this application provides a method for determining the circuit structure, the method comprising:

[0006] Based on the set of line faults corresponding to each transmission line in the power system, the initial line structure of the power system is expanded by planning the line extension, and the expanded line structure of the power system is obtained.

[0007] Determine the load loss value of the extended line structure under line fault conditions;

[0008] Based on the load loss value, a line reinforcement plan is developed for the extended line structure to obtain the target line structure corresponding to the power system.

[0009] In one embodiment, based on the load shedding value, a line reinforcement plan is performed on the extended line structure to obtain the target line structure corresponding to the power system. This includes: analyzing the reinforcement resource requirements of the extended line structure based on the load shedding value to obtain the reinforcement resource requirements corresponding to the extended line structure; and performing line reinforcement planning on the extended line structure based on the reinforcement resource requirements to obtain the target line structure corresponding to the power system.

[0010] In one embodiment, based on the load loss value, a reinforcement resource requirement analysis is performed on the extended line structure to obtain the reinforcement resource requirement corresponding to the extended line structure. This includes: determining the upper limit of the reinforcement resource requirement and the risk aversion coefficient corresponding to the upper limit of the reinforcement resource requirement; and performing a reinforcement resource requirement analysis on the extended line structure based on the risk aversion coefficient, the upper limit of the reinforcement resource requirement, and the load loss value to obtain the reinforcement resource requirement corresponding to the extended line structure.

[0011] In one embodiment, based on the set of line faults corresponding to the transmission lines in the power system, line expansion planning is performed on the initial line structure of the power system to obtain the expanded line structure of the power system. This includes: determining the expansion resource requirements for expanding the power system based on the set of line faults corresponding to the transmission lines in the power system; and performing line expansion planning on the initial line structure of the power system based on the expansion resource requirements to obtain the expanded line structure of the power system.

[0012] In one embodiment, the resource requirement for extending the power system's transmission lines is determined based on the set of line faults corresponding to the transmission lines in the power system. This includes: determining a first resource requirement for the initial extension of the power system based on the set of line faults corresponding to the transmission lines in the power system; determining a second resource requirement for the later operation of the power system based on the set of line faults corresponding to the transmission lines in the power system; and determining the extended resource requirement for extending the power system's transmission lines based on the first and second resource requirements.

[0013] In one embodiment, the process of determining the set of line faults includes: determining the line fault probability corresponding to at least one transmission line in the power system based on the effective wind speed borne by the power system; and determining the set of line faults based on the line fault probabilities corresponding to each transmission line in the power system.

[0014] Secondly, this application also provides a circuit structure determination device. The device includes:

[0015] The extension module is used to perform line extension planning on the initial line structure of the power system based on the set of line faults corresponding to each transmission line in the power system, so as to obtain the extended line structure of the power system.

[0016] The determination module is used to determine the load loss value of the extended line structure under line fault conditions.

[0017] The reinforcement module is used to plan the reinforcement of the extended line structure based on the load loss value, so as to obtain the target line structure corresponding to the power system.

[0018] Thirdly, this application also provides a computer device. The computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to perform the following steps:

[0019] Based on the set of line faults corresponding to each transmission line in the power system, the initial line structure of the power system is expanded by planning the line extension, and the expanded line structure of the power system is obtained.

[0020] Determine the load loss value of the extended line structure under line fault conditions;

[0021] Based on the load loss value, a line reinforcement plan is developed for the extended line structure to obtain the target line structure corresponding to the power system.

[0022] Fourthly, this application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, which, when executed by a processor, performs the following steps:

[0023] Based on the set of line faults corresponding to each transmission line in the power system, the initial line structure of the power system is expanded by planning the line extension, and the expanded line structure of the power system is obtained.

[0024] Determine the load loss value of the extended line structure under line fault conditions;

[0025] Based on the load loss value, a line reinforcement plan is developed for the extended line structure to obtain the target line structure corresponding to the power system.

[0026] Fifthly, this application also provides a computer program product. The computer program product includes a computer program that, when executed by a processor, performs the following steps:

[0027] Based on the set of line faults corresponding to each transmission line in the power system, the initial line structure of the power system is expanded by planning the line extension, and the expanded line structure of the power system is obtained.

[0028] Determine the load loss value of the extended line structure under line fault conditions;

[0029] Based on the load loss value, a line reinforcement plan is developed for the extended line structure to obtain the target line structure corresponding to the power system.

[0030] The aforementioned method, apparatus, computer equipment, and storage medium for determining line structures determine the extended line structure corresponding to the power system based on the set of line faults corresponding to each transmission line; furthermore, based on the load loss value corresponding to the extended line structure under line fault conditions, the target line structure corresponding to the power system is determined. As can be seen from the above, in determining the target line structure, this application does not merely perform line reinforcement planning for the power system, but first performs line expansion planning on the initial line structure of the power system to obtain the corresponding extended line structure. This achieves line expansion while ensuring the minimum expansion resource requirements, effectively reducing resource usage and the conservatism of resource allocation. Then, line reinforcement planning is performed on the extended line structure, achieving maximum avoidance of fault risks to the power system caused by severe weather without affecting subsequent equipment expansion and scale expansion of the power system. This further enhances the power system's resilience in the face of disasters while reducing the resource usage required for line reinforcement. Attached Figure Description

[0031] Figure 1 A flowchart illustrating a method for determining circuit structure provided in this application embodiment;

[0032] Figure 2 A flowchart illustrating the steps for determining a target circuit structure is provided in this application embodiment;

[0033] Figure 3 A flowchart illustrating the steps for determining an extended circuit structure is provided in this application embodiment;

[0034] Figure 4 A flowchart illustrating the steps for determining a set of line faults is provided in this application embodiment.

[0035] Figure 5 An example diagram illustrating the angle between a power transmission line and the wind direction, provided as an embodiment of this application;

[0036] Figure 6 A flowchart illustrating another method for determining circuit structure provided in this application embodiment;

[0037] Figure 7 This application provides an example diagram of a line structure planning architecture.

[0038] Figure 8 A structural block diagram of a circuit structure determination device provided in an embodiment of this application;

[0039] Figure 9 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0041] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application. In the description of this application, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0042] In one embodiment, Figure 1 This is a flowchart illustrating a method for determining a circuit structure according to an embodiment of this application. This embodiment uses the application of this method to a terminal as an example for illustration. It is understood that this method can also be applied to a server, and further to a system including both a terminal and a server, and is implemented through interaction between the terminal and the server. The terminal can be, but is not limited to, various personal computers, laptops, smartphones, tablets, etc. The server can be a standalone server or a server cluster composed of multiple servers. In this embodiment, the method includes the following steps:

[0043] S101, based on the set of line faults corresponding to each transmission line in the power system, perform line expansion planning on the initial line structure of the power system to obtain the extended line structure corresponding to the power system.

[0044] The set of line faults consists of every transmission line in the power system that meets the expected fault conditions. For example, the expected fault conditions could be: the fault probability of the transmission line is greater than or equal to the historical expected fault value; furthermore, the historical expected fault value can be determined based on the fault data of the transmission lines within a historical time period.

[0045] Among them, extended line structure refers to the new line structure obtained by expanding the initial line structure.

[0046] In one embodiment of this application, the process of determining the extended line structure of the power system may specifically include the following: based on the set of line faults corresponding to the transmission lines in the power system, analyzing the resource requirements of the power system's early-stage expansion investment and later-stage operation investment, determining the resource requirements corresponding to the early-stage expansion investment and the later-stage operation investment; summing the resource requirements corresponding to the early-stage expansion investment and the later-stage operation investment, and using the summation result as the total expansion resource requirement; and based on the total expansion resource requirement, completing the line expansion planning of the initial line structure of the power system to obtain the extended line structure corresponding to the power system.

[0047] To further explain, in the process of determining the total extended resource demand, in order to save resources, the total extended resource demand can be optimized according to the extended planning constraints, so that the total extended resource demand can realize the line extension planning of the initial line structure of the power system while meeting the minimum resource requirements.

[0048] The extended planning constraints may include one or more combinations of extended operational constraints (e.g., power flow constraints and power balance constraints), resource demand status constraints, and extended resource demand constraints, which are not limited in this application; further, the extended operational constraints are used to constrain the operating power and system load of the power system; the resource demand status constraints are used to constrain changes in resource demand; and the extended resource demand constraints are used to constrain the upper limit of the extended resource demand.

[0049] S102, determine the load loss value corresponding to the extended line structure under line fault conditions.

[0050] Among them, the load loss value refers to the amount of charge lost by the power system when the extended line structure is affected by a line fault.

[0051] It should be noted that, in order to improve the resilience of the power system in the face of severe weather, the loss of load corresponding to the extended line structure under the worst fault conditions can be determined to provide data support for subsequent extension planning, so that the extended line structure can ensure that the power system's loss of load is minimized even under the worst fault conditions.

[0052] For example, the underload value of the extended line structure under line fault conditions can be determined according to formula (1), and the specific expression is as follows:

[0053]

[0054] Where f2 represents the load loss value corresponding to the extended line structure under line fault conditions, z is a variable in the line fault set, U is the line fault set, and y represents the set of system operation variables after a power system fault occurs; PLos s,t Let t be the load loss of the power system at time t.

[0055] To further explain, since line breaks caused by faults will affect the load loss value, formula (1) can be optimized according to the power system operation constraints so that the power system load loss can be minimized even under the worst fault conditions. The power system operation constraints are used to indicate that only the extended line structure after the extension can be faulted, and also to ensure that once the line is reinforced, it will not be affected by the fault.

[0056] Among them, the power system operation constraints can be shown in formulas (2)-(6):

[0057] k t =z pl，t (1-h pl，t (2)

[0058]

[0059]

[0060]

[0061]

[0062] Where zpl,t is a 0-1 variable used to indicate whether the transmission line is faulty at time t, with a value of 0 indicating no fault and a value of 1 indicating a fault; hpl,t is a 0-1 variable used to indicate whether the line has been reinforced, with a value of 0 indicating no reinforcement and a value of 1 indicating reinforcement; p pl，t Let θ be the transmission power of the transmission line at time t. i，t θ represents the phase angle of node i at time t. j，t Let xi represent the phase angle of node j at time t. j This represents the reactance between transmission line i and transmission line j; vpl,t is a 0-1 variable used to indicate whether resources are being used at time t, with a value of 0 indicating no resources are being used and a value of 1 indicating resources are being used; Ω EL Indicates a collection of generating units and / or lines. p is the maximum transmission power of the transmission line at time t. load，t Let be the total load of the power system at time t; M represents the maximum function.

[0063] To further explain, since there are 0-1 variable multiplications in formulas (2)-(6), general mathematical optimization methods cannot solve them. Therefore, linearization and column-and-constraint generation (C&CG) algorithms can be used to solve formula (1). First, linearization is required, specifically addressing the z-variable multiplications in formulas (2)-(6). pl,t (1-h pl,t The term is introduced with an auxiliary variable K, and linearized according to formula (7). The specific expression is shown below:

[0064]

[0065] Among them, z pl,t This is a 0-1 variable used to indicate whether the transmission line is faulty at time t. A value of 0 indicates no fault has occurred, and a value of 1 indicates a fault has occurred; v pl,t This is a 0-1 variable used to indicate whether resources are invested at time t. A value of 0 indicates that no resources are invested, and a value of 1 indicates that resources are invested.

[0066] Similarly, for the v in formulas (2)-(6) pl,t (1-k t ) = v pl,t (1-z pl,t (1-h pl,t The term )) introduces an auxiliary variable Q, which is linearized according to formula (8). The specific expression is shown below:

[0067]

[0068] Among them, z pl,t This is a 0-1 variable used to indicate whether the transmission line is faulty at time t. A value of 0 indicates no fault has occurred, and a value of 1 indicates a fault has occurred; v pl,t This is a 0-1 variable used to represent whether resources are invested at time t. A value of 0 indicates no resources are invested, and a value of 1 indicates resources are invested; h pl,t It is a 0-1 variable used to indicate whether the line is reinforced. A value of 0 indicates no reinforcement, and a value of 1 indicates reinforcement.

[0069] S103, Based on the load loss value, perform line reinforcement planning on the extended line structure to obtain the target line structure corresponding to the power system.

[0070] It should be noted that, in order to improve the resilience of the power system in the face of severe weather, the extended line structure can be reinforced by using the load loss value corresponding to the most severe line fault conditions. This results in the target line structure for the power system, ensuring that the target line structure remains unaffected and undamaged even under the worst severe weather conditions, thus ensuring the stable operation of the power system.

[0071] In one embodiment of this application, the process of determining the target line structure corresponding to the power system may specifically include the following: a pre-determined upper limit for reinforcement resource requirements and a risk aversion coefficient corresponding to the upper limit of reinforcement resource requirements; further, based on the relationship between the risk aversion coefficient, the upper limit of reinforcement resource requirements, and the load shedding value, an analysis of the reinforcement resource requirements for the extended line structure is performed to obtain the reinforcement resource requirements corresponding to the extended line structure; based on the reinforcement resource requirements, a line reinforcement plan for the extended line structure is completed to obtain the target line structure corresponding to the power system.

[0072] To further explain, in the process of determining the reinforcement resource requirements, in order to save resources, the reinforcement resource requirements can be optimized according to the reinforcement planning constraints, so that the reinforcement resource requirements can meet the minimum resource requirements and realize the line reinforcement planning of the corresponding extended line structure of the power system.

[0073] The hardening planning constraints may include one or more combinations of hardening operation constraints (e.g., power flow constraints and power balance constraints) and hardening resource demand constraints, which are not limited in this application; further, the hardening operation constraints are used to constrain the operating power and system load of the power system; the hardening resource demand constraints are used to constrain the upper limit of the hardening resource demand.

[0074] The aforementioned method for determining the line structure involves determining the extended line structure corresponding to the power system based on the set of line faults corresponding to each transmission line; then, determining the target line structure corresponding to the power system based on the load loss value corresponding to the extended line structure under line fault conditions. As can be seen from the above, this application does not simply perform line reinforcement planning for the power system during the determination of the target line structure. Instead, it first performs line expansion planning on the initial line structure of the power system to obtain the corresponding extended line structure. This achieves line expansion while ensuring the minimum expansion resource requirements, effectively reducing resource usage and the conservatism of resource allocation. Furthermore, line reinforcement planning is performed on the extended line structure, minimizing the risk of power system failures caused by severe weather without affecting subsequent equipment expansion and scale expansion. This further enhances the power system's resilience in the face of disasters while reducing the resource usage required for line reinforcement.

[0075] Based on the technical solutions of the above embodiments, this application also provides an optional embodiment. In this optional embodiment, the steps for determining the target line structure corresponding to the power system are optimized and improved, enabling line reinforcement to be achieved with minimal reinforcement resource requirements, reducing resource consumption, and improving the power system's resilience in the face of disasters.

[0076] like Figure 2 The steps for determining the target line structure shown include the following:

[0077] S201. Based on the load loss value, analyze the reinforcement resource requirements of the extended line structure to obtain the corresponding reinforcement resource requirements of the extended line structure.

[0078] Among them, the reinforcement resource requirement is used to represent the minimum amount of resources required to reinforce the extended line structure.

[0079] In one embodiment of this application, the process of determining the reinforcement resource demand may specifically include the following: determining the upper limit of the reinforcement resource demand and the risk aversion coefficient corresponding to the upper limit of the reinforcement resource demand based on the historical experience of the staff and the actual operation of the power system; further, analyzing the reinforcement resource demand of the extended line structure based on the risk aversion coefficient, the upper limit of the reinforcement resource demand and the load loss value to obtain the reinforcement resource demand corresponding to the extended line structure.

[0080] For example, if the risk aversion coefficient is determined to be σ, the upper limit of the reinforcement resource demand is... The reinforcement resource requirements corresponding to the extended line structure can then be determined according to formulas (9)-(10), and the specific expressions are as follows:

[0081]

[0082]

[0083] Among them, C INVH To reinforce resource demand; Ω h For the collection of lines to be reinforced; h i This is a 0-1 variable, representing whether the transmission line has been reinforced; a value of 0 indicates no reinforcement, and a value of 1 indicates reinforcement. h Unit resource requirement for reinforcing transmission lines; L i The length of the transmission line; Let i be the maximum transmission power of transmission line i; σ represents the upper limit of the reinforcement resource requirements for transmission lines; σ is the risk aversion coefficient.

[0084] To further explain, the load loss value corresponding to the most severe line fault is used as the benchmark value to strengthen the extended line structure. This ensures that the load loss value of the strengthened power system meets the risk avoidance conditions, minimizing the fault risks brought by severe weather to the power system and thus improving the power system's resilience in the face of severe weather. The risk avoidance conditions are shown in formula (11):

[0085]

[0086] Among them, R c Ω is a robust function; t For the planning period set; R t The elastic uncertainty coefficient for each planning period; To reinforce the load loss values ​​of the planned power system.

[0087] S202, based on the reinforcement resource requirements, conduct line reinforcement planning for the extended line structure to obtain the target line structure corresponding to the power system.

[0088] In one embodiment of this application, the process of determining the target line structure corresponding to the power system may specifically include the following: based on the reinforcement resource demand, performing line reinforcement planning on the extended line structure to obtain the target line reinforcement scheme corresponding to the reinforcement resource demand; and reinforcing the extended line structure according to the target line reinforcement scheme to obtain the target line structure corresponding to the reinforced power system.

[0089] The above-mentioned method for determining the line structure analyzes the reinforcement resource requirements of the extended line structure based on the load loss value, thereby obtaining the corresponding reinforcement resource requirements for the extended line structure. This ensures that the reinforcement resource requirements meet the minimum resource requirements, enabling line reinforcement to be achieved with the minimum reinforcement resource requirements, reducing resource consumption, and further enhancing the resilience of the power system in the face of disasters.

[0090] Based on the technical solutions of the above embodiments, this application also provides an optional embodiment. In this optional embodiment, the step of determining the extended line structure is optimized and improved, enabling line expansion with minimal expansion resource requirements, reducing resource usage and the conservatism of resource allocation, and saving manpower and material resources. See also Figure 3 The process of determining the extended circuit structure shown includes the following steps:

[0091] S301, Based on the set of line faults corresponding to the transmission lines in the power system, determine the expansion resource requirements for extending the power system's lines.

[0092] Among them, the extended resource requirement is used to represent the minimum amount of resources required to extend the power system lines.

[0093] In one embodiment of this application, the process of determining the extended resource requirements may specifically include the following: determining the first resource requirements for the initial expansion of the power system based on the set of line faults corresponding to the transmission lines in the power system; determining the second resource requirements for the later operation of the power system based on the set of line faults corresponding to the transmission lines in the power system; and determining the extended resource requirements for expanding the power system based on the first and second resource requirements.

[0094] Among them, the first resource demand represents the amount of resources required for the early expansion of the power system, the second resource demand represents the amount of resources required for the later operation of the power system, and the expansion resource demand represents the total amount of resources required for the expansion of power system lines.

[0095] For example, the initial resource demand for the early expansion of the power system is obtained according to formula (12), and the specific expression is as follows:

[0096]

[0097] Among them, C INV The primary resource demand, The first sub-resource requirement (sub-resources can be units and / or lines), vpl is a 0-1 variable, where a value of 0 indicates no resource allocation, and a value of 1 indicates resource allocation, m b For resource recovery rate, Ω EL This refers to a set of generating units and / or lines.

[0098] The resource recovery rate can be obtained according to formula (13), and the specific expression is as follows:

[0099]

[0100] Where r is the resource conversion rate and t is the resource usage period.

[0101] Furthermore, according to formula (14), the second resource demand for the later-stage operation of the power system is obtained, and the specific expression is as follows:

[0102]

[0103] Among them, C OPE This is the second resource demand. This is the second resource quantity function. To provide power to the generator unit, Ω GT This represents a set of generator units.

[0104] Furthermore, according to formula (15), the required resources for extending the power system's lines are obtained, and the specific expression is as follows:

[0105] min f1=C INV +C OPE (15)

[0106] Where f1 represents the expansion resource requirement.

[0107] It should be noted that in determining the extended resource demand, extended planning constraints need to be considered to ensure that the obtained extended resource demand meets the minimum resource requirement and reduces resource usage. These extended planning constraints include extended operational constraints (e.g., power flow constraints and power balance constraints), resource demand state constraints, and extended resource demand quantity constraints.

[0108] To further explain, the resource demand constraint can be shown in formula (16):

[0109] C INV ≤C MAX (16)

[0110] Among them, C MAX This represents the maximum amount of resources.

[0111] The resource demand state constraint can be shown in formula (17):

[0112]

[0113] Among them, v pl The variable is 0-1, where a value of 0 indicates no resource investment, a value of 1 indicates resource investment, and t represents the resource usage period.

[0114] The extended operational constraints can be shown in equations (18)-(22):

[0115]

[0116]

[0117]

[0118]

[0119]

[0120] Where, p pl，t Let θ be the transmission power of the transmission line at time t. i，t θ represents the phase angle of node i at time t. j，t Let xi represent the phase angle of node j at time t. j V represents the reactance between transmission line i and transmission line j. pl,tΩ is a 0-1 variable used to represent whether resources are invested at time t. A value of 0 indicates no resources are invested, and a value of 1 indicates resources are invested. EL Indicates a collection of generating units and / or lines. p is the maximum transmission power of the transmission line at time t. load，t Let M be the total load of the power system at time t; M represents the maximum function. The unit output at time t.

[0121] To further explain, linearization and column-and constraint generation (C&CG) algorithms can be used to solve formula (15) to obtain the extended resource requirements.

[0122] S302, based on the expansion resource demand, perform line expansion planning on the initial line structure of the power system to obtain the corresponding expanded line structure of the power system.

[0123] In one embodiment of this application, the process of determining the extended line structure corresponding to the power system may specifically include the following: based on the extended resource demand, performing line extension planning on the initial line structure of the power system to obtain the target line extension scheme corresponding to the extended resource demand; and based on the target line extension scheme, extending the initial line structure of the power system to obtain the extended line structure corresponding to the extended power system.

[0124] The above-mentioned method for determining the line structure determines the required resources for extending the power system based on the set of line faults corresponding to the transmission lines in the power system. This ensures that the required resources meet the minimum resource requirement, enabling line extension to be achieved with the minimum required resources. This effectively reduces resource usage and the conservatism of resource allocation, and saves manpower and material resources.

[0125] Based on the technical solutions of the above embodiments, this application also provides an optional embodiment. In this optional embodiment, the step of determining the line fault set is optimized and improved, taking into account the impact of the effective wind speed that the power system can withstand under severe weather conditions on the probability of line faults. This makes the line fault set more referential and provides a reference range for subsequent expansion planning. See also Figure 4 The steps for determining the set of line faults shown include the following:

[0126] S401, based on the effective wind speed that the power system can withstand, determine the line fault probability corresponding to at least one transmission line in the power system.

[0127] For example, if the disaster type is a typhoon disaster, when calculating the effective wind speed that the power system can withstand, the impact of the typhoon on the power system can be analyzed first according to formula (23) to obtain the typhoon wind speed that the power system can withstand. The specific expression is as follows:

[0128]

[0129] Where T is an empirical parameter used to adjust wind speed distribution, typically set to 0.5, r is the distance of the power transmission line from the typhoon center, and V... r V is the typhoon wind speed vector. max R represents the maximum wind speed of the typhoon. max The radius represents the typhoon's maximum wind speed radius.

[0130] It should be noted that, since the Earth is a sphere, the distance r between the power transmission line in the power system and the center of the typhoon can be calculated according to formula (24), and the specific expression is as follows:

[0131] r=|O1O2|=R·arccos[sin y1·sin y2+cos y1·cos y2·cos(x1-x2)] (24)

[0132] Where r is the distance between the power transmission line in the power system and the center of the typhoon, O1 represents the power transmission line in the power system, O2 represents the center of the typhoon, R is the Earth's radius, x1 is the longitude corresponding to the location of the power transmission line in the power system, x2 is the longitude corresponding to the location of the typhoon, y1 is the latitude corresponding to the location of the power transmission line in the power system, and y2 is the latitude corresponding to the location of the typhoon, with east and north longitudes being positive and west and south longitudes being negative.

[0133] To further explain, the maximum wind speed and maximum wind speed radius of a typhoon can be obtained by fitting the distribution of the typhoon's maximum wind speed and maximum wind speed radius using historical typhoon data. If the maximum wind speed and maximum wind speed radius of a typhoon follow a log-normal distribution, then the maximum wind speed of the typhoon can be obtained according to formula (25), as shown in the following expression:

[0134]

[0135] Among them, V max σ represents the maximum wind speed of the typhoon. υ μ is the standard deviation of the maximum wind speed. υ This represents the average of the maximum wind speeds.

[0136] According to formula (26), the maximum wind speed radius of the typhoon is obtained, and the specific expression is as follows:

[0137]

[0138] Among them, R max σ is the radius of the typhoon's maximum wind speed. r μ is the standard deviation of the radius of maximum wind speed. r This is the average radius of the maximum wind speed.

[0139] Furthermore, since axisymmetric wind speed represents the average boundary layer wind speed or gradient wind speed at the ground, determining the impact of typhoon disasters on the power system based on axisymmetric wind speed is more meaningful. Therefore, the axisymmetric wind speed can be obtained by adjusting the typhoon wind speed by height (e.g., to a height of 10 meters) according to formula (27):

[0140] V 10 =K υ ·V r (27)

[0141] Among them, V 10 K is an axisymmetric wind speed vector. v This is an empirical parameter, with a value of 0.8, V r This is the typhoon wind speed vector.

[0142] Furthermore, since the effective wind speed that the power system can withstand is also affected by the typhoon wind direction, the typhoon wind direction can be calculated according to formula (28), and the specific expression is as follows:

[0143]

[0144] Where α represents the typhoon wind direction, and r represents the distance of the power transmission lines in the power system from the center of the typhoon; R max The radius represents the typhoon's maximum wind speed radius.

[0145] Furthermore, considering the effects of the geocentric turning force and the Coriolis force, typhoons rotate counterclockwise in the Northern Hemisphere. Therefore, the movement of a typhoon strengthens the wind speed on its right side and reduces the wind speed on its left side. The effect of typhoon movement on axisymmetric wind speed can be eliminated according to formula (29), the specific expression of which is shown below:

[0146]

[0147] Among them, V d The axisymmetric wind speed vector V 10 The correction vector; V c R is the typhoon's moving velocity vector, and r is the distance of the power transmission lines in the power system from the typhoon's center. max The radius represents the typhoon's maximum wind speed radius.

[0148] Furthermore, the axisymmetric wind speed vector can be vector-added with the axisymmetric wind speed correction vector to obtain the corrected typhoon wind speed vector, as shown in formula (30):

[0149] V = V d +V 10 (30)

[0150] Where V is the corrected typhoon wind speed vector, V d V is the correction vector for the axisymmetric wind speed vector. 10 It is an axisymmetric wind speed vector.

[0151] Furthermore, the effective wind speed of the typhoon can be obtained according to formula (31), and the specific expression is as follows:

[0152] V e =sinβ·V (31)

[0153] Among them, V e The effective wind speed is given by β, which is the angle between the transmission line and the wind direction (determined based on the typhoon wind direction). V is the corrected typhoon wind speed vector. An example diagram of the angle between the transmission line and the effective wind direction is shown below. Figure 5 As shown.

[0154] Furthermore, after obtaining the effective wind speed V of the typhoon... e Then, the fault probability of the transmission line can be obtained according to formula (32), and the specific expression is as follows:

[0155]

[0156] Where, λ w，l V represents the probability of failure of the l-th transmission line w. w，l V is the effective wind speed that the l-th transmission line can withstand; d，l ΔL represents the maximum wind speed that the l-th line can withstand; ΔL represents the length of the line.

[0157] Furthermore, assuming that the faults in each line segment are independent, the fault probability of the entire line w can be obtained according to formula (33), and the specific expression is as follows:

[0158]

[0159] Where, λ w Let λ be the fault probability of transmission line w, L be the total number of transmission lines w in the power system, and λ be the fault probability of transmission line w. w，l Let w be the probability of failure for the l-th line.

[0160] S402, determine the set of line faults based on the line fault probabilities of each transmission line in the power system.

[0161] In one embodiment of this application, the line fault probabilities of each transmission line in the power system can be screened according to the fault expectation conditions, and each transmission line that meets the fault expectation conditions can be used as an element in the line fault set to obtain the line fault set.

[0162] The expected fault condition can be: the fault probability of the transmission line is greater than or equal to the historical expected fault value, or the expected fault condition can be: the fault entropy of the transmission line is less than or equal to the historical fault entropy; where the historical expected fault value and the historical fault entropy can be determined based on the fault data of the transmission line within a historical time period.

[0163] For example, the specific expression is as follows:

[0164]

[0165] Where U represents the set of line faults, z w The state of a transmission line is represented by a 0-1 variable (where 0 represents a fault and 1 represents normal operation), λ w Let w be the fault probability of transmission line w, and -log2ΔL be the historical fault entropy of the transmission line w.

[0166] The above-mentioned method for determining the line structure determines the line fault probability of at least one transmission line in the power system by using the effective wind speed that the power system can withstand. It takes into account the impact of the effective wind speed that the power system can withstand on the line fault probability under severe weather conditions, making the line fault set more referential and providing a reference range for subsequent expansion planning.

[0167] Based on the technical solutions of the above embodiments, this application also provides an optional embodiment, in which the process of determining the circuit structure is described in detail. See [link to optional embodiment]. Figure 6 The method for determining the circuit structure shown includes:

[0168] S601, based on the effective wind speed that the power system can withstand, determine the line fault probability corresponding to at least one transmission line in the power system.

[0169] S602, determine the set of line faults based on the line fault probability of each transmission line in the power system.

[0170] S603, based on the set of line faults corresponding to the transmission lines in the power system, determine the initial resource requirements for the early expansion of the power system.

[0171] S604, based on the set of line faults corresponding to the transmission lines in the power system, determine the second resource requirement for the later operation of the power system.

[0172] S605, determine the extended resource requirements for extending the power system lines based on the first resource requirement and the second resource requirement.

[0173] S606, based on the expansion resource demand, performs line expansion planning on the initial line structure of the power system to obtain the corresponding expanded line structure of the power system.

[0174] S607, determine the load loss value corresponding to the extended line structure under line fault conditions.

[0175] S608 determines the upper limit of reinforcement resource demand and the corresponding risk aversion coefficient.

[0176] S609, based on the risk aversion coefficient, the upper limit of reinforcement resource requirements, and the load loss value, analyzes the reinforcement resource requirements of the extended line structure to obtain the corresponding reinforcement resource requirements of the extended line structure.

[0177] S610, based on the reinforcement resource requirements, conducts line reinforcement planning for the extended line structure to obtain the target line structure corresponding to the power system.

[0178] In one embodiment of this application, such as Figure 7 As shown, the process of extending and reinforcing power system lines can be logically divided into three layers: upper, middle, and lower. The upper layer corresponds to the extension planning stage, the middle layer to the disaster prevention stage, the upper-middle layer to a two-layer robust planning stage, and the lower layer to the risk avoidance stage (i.e., Figure 7 In the context of IGDT (Information Gap Decision Theory) risk aversion, the following can be included: During the extended planning phase, based on the set of line faults corresponding to the transmission lines in the power system, the initial resource requirement for the initial expansion of the power system (i.e., Figure 7 The initial investment cost and the secondary resource requirements for later operation (i.e., Figure 7 Operating costs); based on the first and second resource requirements, determine the extended resource requirements for power system line expansion (i.e., operating costs); Figure 7 Minimize planning costs in the process; in the disaster prevention phase, based on the line fault set (i.e. Figure 7 The spatiotemporal uncertainty set of the typhoon is used to determine the load loss value corresponding to the extended line structure under the most severe line fault condition (i.e., Figure 7 Minimize the loss load in the disaster; minimum loss load under the most severe disaster; in the risk avoidance phase, the loss load value obtained in the disaster prevention phase (i.e. Figure 7The load shedding (in the context of load loss) is used as the benchmark value of the elasticity index in the risk aversion phase. With the goal of maximizing the elasticity index, the reinforcement resource demand (elastic investment budget) is determined by the upper limit of reinforcement resource demand and the corresponding risk aversion coefficient. Based on the reinforcement resource demand, a line reinforcement plan is developed for the extended line structure (i.e.,...). Figure 7 (Line reinforcement in the process) to obtain the target line structure corresponding to the power system.

[0179] The aforementioned method for determining the line structure involves determining the extended line structure corresponding to the power system based on the set of line faults corresponding to each transmission line; then, determining the target line structure corresponding to the power system based on the load loss value corresponding to the extended line structure under line fault conditions. As can be seen from the above, this application does not simply perform line reinforcement planning for the power system during the determination of the target line structure. Instead, it first performs line expansion planning on the initial line structure of the power system to obtain the corresponding extended line structure. This achieves line expansion while ensuring the minimum expansion resource requirements, effectively reducing resource usage and the conservatism of resource allocation. Furthermore, line reinforcement planning is performed on the extended line structure, minimizing the risk of power system failures caused by severe weather without affecting subsequent equipment expansion and scale expansion. This further enhances the power system's resilience in the face of disasters while reducing the resource usage required for line reinforcement.

[0180] It should be understood that although the steps in the flowcharts of the above embodiments are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0181] Based on the same inventive concept, this application also provides a circuit structure determination apparatus for implementing the circuit structure determination method described above. The solution provided by this apparatus is similar to the solution described in the above method; therefore, the specific limitations in one or more circuit structure determination apparatus embodiments provided below can be found in the limitations of the circuit structure determination method described above, and will not be repeated here.

[0182] In one embodiment, such as Figure 8 As shown, a circuit structure determination device is provided, comprising: an expansion module 10, a determination module 20, and a reinforcement module 30, wherein:

[0183] Extension module 10 is used to perform line expansion planning on the initial line structure of the power system based on the set of line faults corresponding to each transmission line in the power system, so as to obtain the extended line structure of the power system.

[0184] Module 20 is used to determine the underload value of the extended line structure under line fault conditions;

[0185] The reinforcement module 30 is used to plan the reinforcement of the extended line structure based on the load loss value, so as to obtain the target line structure corresponding to the power system.

[0186] The aforementioned line structure determination device determines the extended line structure corresponding to the power system based on the set of line faults corresponding to each transmission line; furthermore, it determines the target line structure corresponding to the power system based on the load loss value corresponding to the extended line structure under line fault conditions. As can be seen from the above, in determining the target line structure, this application does not merely perform line reinforcement planning for the power system, but first performs line expansion planning on the initial line structure of the power system to obtain the corresponding extended line structure. This achieves line expansion while ensuring the minimum expansion resource requirements, effectively reducing resource usage and the conservatism of resource allocation. Then, line reinforcement planning is performed on the extended line structure, achieving maximum avoidance of fault risks to the power system caused by severe weather without affecting subsequent equipment expansion and scale expansion of the power system. This further enhances the power system's resilience in the face of disasters while reducing the resource usage required for line reinforcement.

[0187] Each module in the aforementioned circuit structure determination device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0188] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 9As shown, the computer device includes a processor, memory, input / output interface, communication interface, display unit, and input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The input / output interface is used for exchanging information between the processor and external devices. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, NFC (Near Field Communication), or other technologies. When executed by the processor, the computer program implements a circuit structure determination method. The display unit is used to form a visually visible image and can be a display screen, projection device, or virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0189] Those skilled in the art will understand that Figure 9 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0190] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0191] Based on the set of line faults corresponding to each transmission line in the power system, the initial line structure of the power system is expanded by planning the line extension, and the expanded line structure of the power system is obtained.

[0192] Determine the load loss value of the extended line structure under line fault conditions;

[0193] Based on the load loss value, a line reinforcement plan is developed for the extended line structure to obtain the target line structure corresponding to the power system.

[0194] In one embodiment, when the processor executes the computer program, it further performs the following steps: based on the load loss value, analyzes the reinforcement resource requirements of the extended line structure to obtain the reinforcement resource requirements corresponding to the extended line structure; based on the reinforcement resource requirements, plans the line reinforcement of the extended line structure to obtain the target line structure corresponding to the power system.

[0195] In one embodiment, when the processor executes the computer program, it further performs the following steps: determining the upper limit of the reinforcement resource requirement and the risk aversion coefficient corresponding to the upper limit of the reinforcement resource requirement; and performing a reinforcement resource requirement analysis on the extended line structure based on the risk aversion coefficient, the upper limit of the reinforcement resource requirement, and the load loss value to obtain the reinforcement resource requirement corresponding to the extended line structure.

[0196] In one embodiment, when the processor executes the computer program, it further performs the following steps: determining the expansion resource requirements for extending the power system based on the set of line faults corresponding to the transmission lines in the power system; and performing line extension planning on the initial line structure of the power system based on the expansion resource requirements to obtain the extended line structure corresponding to the power system.

[0197] In one embodiment, when the processor executes the computer program, it further performs the following steps: determining the first resource requirement for the initial expansion of the power system based on the set of line faults corresponding to the transmission lines in the power system; determining the second resource requirement for the later operation of the power system based on the set of line faults corresponding to the transmission lines in the power system; and determining the expansion resource requirement for expanding the power system's lines based on the first and second resource requirements.

[0198] In one embodiment, when the processor executes the computer program, it further performs the following steps: determining the line fault probability corresponding to at least one transmission line in the power system based on the effective wind speed borne by the power system; and determining the line fault set based on the line fault probabilities corresponding to each transmission line in the power system.

[0199] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0200] Based on the set of line faults corresponding to each transmission line in the power system, the initial line structure of the power system is expanded by planning the line extension, and the expanded line structure of the power system is obtained.

[0201] Determine the load loss value of the extended line structure under line fault conditions;

[0202] Based on the load loss value, a line reinforcement plan is developed for the extended line structure to obtain the target line structure corresponding to the power system.

[0203] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: analyzes the reinforcement resource requirements of the extended line structure to obtain the reinforcement resource requirements corresponding to the extended line structure; and plans the line reinforcement of the extended line structure based on the reinforcement resource requirements to obtain the target line structure corresponding to the power system.

[0204] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: determining the upper limit of the reinforcement resource requirement and the risk aversion coefficient corresponding to the upper limit of the reinforcement resource requirement; and performing a reinforcement resource requirement analysis on the extended line structure based on the risk aversion coefficient, the upper limit of the reinforcement resource requirement, and the load loss value to obtain the reinforcement resource requirement corresponding to the extended line structure.

[0205] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: determining the expansion resource requirements for extending the power system based on the set of line faults corresponding to the transmission lines in the power system; and performing line extension planning on the initial line structure of the power system based on the expansion resource requirements to obtain the extended line structure corresponding to the power system.

[0206] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: determining the first resource requirement for the initial expansion of the power system based on the set of line faults corresponding to the transmission lines in the power system; determining the second resource requirement for the later operation of the power system based on the set of line faults corresponding to the transmission lines in the power system; and determining the expansion resource requirement for expanding the power system based on the first and second resource requirements.

[0207] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: determining the line fault probability corresponding to at least one transmission line in the power system based on the effective wind speed borne by the power system; and determining the line fault set based on the line fault probabilities corresponding to each transmission line in the power system.

[0208] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, performs the following steps:

[0209] Based on the set of line faults corresponding to each transmission line in the power system, the initial line structure of the power system is expanded by planning the line extension, and the expanded line structure of the power system is obtained.

[0210] Determine the load loss value of the extended line structure under line fault conditions;

[0211] Based on the load loss value, a line reinforcement plan is developed for the extended line structure to obtain the target line structure corresponding to the power system.

[0212] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: analyzes the reinforcement resource requirements of the extended line structure to obtain the reinforcement resource requirements corresponding to the extended line structure; and plans the line reinforcement of the extended line structure based on the reinforcement resource requirements to obtain the target line structure corresponding to the power system.

[0213] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: determining the upper limit of the reinforcement resource requirement and the risk aversion coefficient corresponding to the upper limit of the reinforcement resource requirement; and performing a reinforcement resource requirement analysis on the extended line structure based on the risk aversion coefficient, the upper limit of the reinforcement resource requirement, and the load loss value to obtain the reinforcement resource requirement corresponding to the extended line structure.

[0214] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: determining the expansion resource requirements for extending the power system based on the set of line faults corresponding to the transmission lines in the power system; and performing line extension planning on the initial line structure of the power system based on the expansion resource requirements to obtain the extended line structure corresponding to the power system.

[0215] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: determining the first resource requirement for the initial expansion of the power system based on the set of line faults corresponding to the transmission lines in the power system; determining the second resource requirement for the later operation of the power system based on the set of line faults corresponding to the transmission lines in the power system; and determining the expansion resource requirement for expanding the power system based on the first and second resource requirements.

[0216] In one embodiment, when the computer program is executed by the processor, it further performs the following steps: determining the line fault probability corresponding to at least one transmission line in the power system based on the effective wind speed borne by the power system; and determining the line fault set based on the line fault probabilities corresponding to each transmission line in the power system.

[0217] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data shall comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0218] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. This computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the above methods. Any references to memory, data blocks, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The data blocks involved in the embodiments provided in this application may include at least one of relational data blocks and non-relational data blocks. Non-relational data blocks may include, but are not limited to, blockchain-based distributed data blocks. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0219] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0220] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A method for determining circuit structure, characterized in that, The method includes: Based on the set of line faults corresponding to each transmission line in the power system, the initial line structure of the power system is extended by planning to obtain the extended line structure of the power system; the set of line faults includes transmission lines in the power system that meet the expected fault conditions; the expected fault conditions include that the fault probability of the transmission line is greater than or equal to the historical expected fault value. Determine the load loss value corresponding to the extended line structure under line fault conditions; the load loss value is the amount of charge lost by the power system under the influence of the extended line structure and the line fault. Based on the load loss value, a line reinforcement plan is made for the extended line structure to obtain the target line structure corresponding to the power system; The step of planning line reinforcement for the extended line structure based on the load loss value to obtain the target line structure corresponding to the power system includes: Based on the load loss value, the reinforcement resource requirement of the extended line structure is analyzed to obtain the reinforcement resource requirement corresponding to the extended line structure. The reinforcement planning constraints are used to optimize the reinforcement resource demand; wherein, the reinforcement planning constraints include reinforcement operation constraints and reinforcement resource demand constraints; the reinforcement operation constraints are used to constrain the operating power and system load of the power system; the reinforcement resource demand constraints are used to constrain the upper limit of the reinforcement resource demand. Based on the required reinforcement resources, a reinforcement plan is developed for the extended line structure to obtain the target line structure corresponding to the power system.

2. The method according to claim 1, characterized in that, The step of analyzing the reinforcement resource requirements of the extended line structure based on the load loss value to obtain the corresponding reinforcement resource requirements of the extended line structure includes: Determine the upper limit of reinforcement resource demand, and the risk aversion coefficient corresponding to the upper limit of reinforcement resource demand; Based on the risk aversion coefficient, the upper limit of reinforcement resource requirements, and the load loss value, the reinforcement resource requirements of the extended line structure are analyzed to obtain the reinforcement resource requirements corresponding to the extended line structure.

3. The method according to claim 1, characterized in that, The step of performing line expansion planning on the initial line structure of the power system based on the set of line faults corresponding to the transmission lines in the power system to obtain the expanded line structure of the power system includes: Based on the set of line faults corresponding to the transmission lines in the power system, determine the expansion resource requirements for line expansion in the power system; Based on the required expansion resources, the initial line structure of the power system is expanded to obtain the corresponding expanded line structure of the power system.

4. The method according to claim 1, characterized in that, The step of determining the expansion resource requirements for extending the power system's transmission lines based on the set of line faults corresponding to the transmission lines in the power system includes: The initial resource requirement for the power system expansion is determined based on the set of line faults corresponding to the transmission lines in the power system. The second resource requirement for the later operation of the power system is determined based on the set of line faults corresponding to the transmission lines in the power system. Based on the first resource demand and the second resource demand, the extended resource demand for extending the power system lines is determined.

5. The method according to any one of claims 1-4, characterized in that, The process of determining the set of line faults includes: Based on the effective wind speed that the power system can withstand, determine the line fault probability corresponding to at least one transmission line in the power system; The set of line faults is determined based on the line fault probability corresponding to each transmission line in the power system.

6. The method according to any one of claims 1-4, characterized in that, The method further includes: Based on the effective wind speed that the power system can withstand, determine the line fault probability corresponding to at least one transmission line in the power system; The set of line faults is determined based on the line fault probability of each transmission line in the power system.

7. A circuit structure determination device, characterized in that, The device includes: An extension module is used to perform line extension planning on the initial line structure of the power system based on the line fault set corresponding to each transmission line in the power system, to obtain the extended line structure corresponding to the power system; the line fault set includes transmission lines in the power system that meet the fault expectation conditions; the fault expectation conditions include that the fault probability of the transmission line is greater than or equal to the historical fault expectation value. The determination module is used to determine the load loss value corresponding to the extended line structure under line fault conditions; the load loss value is the amount of charge lost by the power system under the influence of the extended line structure and the line fault. The reinforcement module is used to perform line reinforcement planning on the extended line structure based on the load loss value, so as to obtain the target line structure corresponding to the power system; The step of planning line reinforcement for the extended line structure based on the load loss value to obtain the target line structure corresponding to the power system includes: Based on the load loss value, the reinforcement resource requirement of the extended line structure is analyzed to obtain the reinforcement resource requirement corresponding to the extended line structure. The reinforcement planning constraints are used to optimize the reinforcement resource demand; wherein, the reinforcement planning constraints include reinforcement operation constraints and reinforcement resource demand constraints; the reinforcement operation constraints are used to constrain the operating power and system load of the power system; the reinforcement resource demand constraints are used to constrain the upper limit of the reinforcement resource demand. Based on the required reinforcement resources, a reinforcement plan is developed for the extended line structure to obtain the target line structure corresponding to the power system.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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