Method, device and equipment for determining inter-provincial power transmission project planning scheme

Abstract

The application relates to a method, device and equipment for determining a provincial interconnection power transmission engineering planning scheme. The method comprises the following steps: obtaining operation and maintenance resource input and carbon emission resource input of a power system; determining a target voltage level of each provincial interconnection power transmission engineering in the power system and resource input under the target voltage level; based on the operation and maintenance resource input, the carbon emission resource input, the resource input of each provincial interconnection power transmission engineering under the target voltage level and a pre-constructed resource input total amount target function, determining optimal operation and maintenance resource input, optimal carbon emission resource input and optimal resource input of each provincial interconnection power transmission engineering under the target voltage level when the resource input total amount reaches a minimum value; and determining the provincial interconnection power transmission engineering planning scheme. The method can improve the efficiency of determining the provincial interconnection power transmission engineering planning scheme.

Description

Technical Field

[0001] The present application relates to the field of power electronics technology, and in particular to a method, apparatus, computer equipment, computer-readable storage medium, and computer program product for determining an inter-provincial power transmission project planning scheme. Background Art

[0002] Interprovincial power transmission projects can transport electricity from one province to another, providing power to power-deficient provinces. Proper planning of interprovincial power transmission projects can ensure high transmission efficiency and low resource investment. Therefore, proper planning of interprovincial power transmission projects is crucial.

[0003] Traditionally, the methods for planning inter-provincial transmission projects include: 1) transmission network planning based on mixed-integer nonlinear programming algorithms, which is mainly applicable to AC transmission projects of 500 kV (kilovolts) and below; and 2) transmission network planning based on mixed-integer linear programming algorithms, which is mainly targeted at AC and DC ultra-high voltage or UHV transmission projects above 500 kV.

[0004] However, current inter-provincial transmission project planning methods are computationally inefficient when the grid is large. Summary of the Invention

[0005] Based on this, it is necessary to provide an efficient method, device, computer equipment, computer-readable storage medium and computer program product for determining inter-provincial power transmission project planning schemes in response to the above technical problems.

[0006] In a first aspect, the present application provides a method for determining an inter-provincial power transmission project planning scheme, the method comprising:

[0007] Obtain the operation and maintenance resource input and carbon emission resource input of the power system;

[0008] For each inter-provincial transmission project in the power system, determine the target voltage level of the inter-provincial transmission project and the resource input amount under the target voltage level; the target voltage level is the simulated voltage level under the condition of the lowest unit resource input amount of the inter-provincial transmission project;

[0009] Based on the O&M resource input, carbon emission resource input, resource input for each inter-provincial transmission project at the target voltage level, and a pre-built total resource input objective function, determine the optimal O&M resource input, optimal carbon emission resource input, and optimal resource input for each inter-provincial transmission project at the target voltage level while minimizing the total resource input;

[0010] Based on the target voltage levels of multiple inter-provincial transmission projects, the optimal operation and maintenance resource input and the optimal carbon emission resource input of the power system, and the optimal resource input of each inter-provincial transmission project under the target voltage level, the inter-provincial transmission project planning scheme is determined.

[0011] In a second aspect, the present application further provides a device for determining an inter-provincial power transmission project planning scheme, the device comprising:

[0012] An acquisition module is used to obtain the operation and maintenance resource input and carbon emission resource input of the power system;

[0013] a determination module for determining, for each inter-provincial transmission project in the power system, a target voltage level for the inter-provincial transmission project and the resource input amount under the target voltage level; the target voltage level is a simulated voltage level when the unit resource input amount of the inter-provincial transmission project is the lowest;

[0014] a processing module for determining, based on the operation and maintenance resource input, the carbon emission resource input, the resource input of each inter-provincial power transmission project at the target voltage level, and a pre-established total resource input objective function, the optimal operation and maintenance resource input, the optimal carbon emission resource input, and the optimal resource input of each inter-provincial power transmission project at the target voltage level when the total resource input is minimized;

[0015] The planning module is used to determine the inter-provincial transmission project planning scheme based on the target voltage levels of multiple inter-provincial transmission projects, the optimal operation and maintenance resource input and the optimal carbon emission resource input of the power system, and the optimal resource input of each inter-provincial transmission project under the target voltage level.

[0016] In a third aspect, the present application further provides a computer device comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0017] Obtain the operation and maintenance resource input and carbon emission resource input of the power system;

[0018] For each inter-provincial transmission project in the power system, determine the target voltage level of the inter-provincial transmission project and the resource input amount under the target voltage level; the target voltage level is the simulated voltage level under the condition of the lowest unit resource input amount of the inter-provincial transmission project;

[0019] Based on the O&M resource input, carbon emission resource input, resource input for each inter-provincial transmission project at the target voltage level, and a pre-built total resource input objective function, determine the optimal O&M resource input, optimal carbon emission resource input, and optimal resource input for each inter-provincial transmission project at the target voltage level while minimizing the total resource input;

[0020] Based on the target voltage levels of multiple inter-provincial transmission projects, the optimal operation and maintenance resource input and the optimal carbon emission resource input of the power system, and the optimal resource input of each inter-provincial transmission project under the target voltage level, the inter-provincial transmission project planning scheme is determined.

[0021] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the following steps:

[0022] Obtain the operation and maintenance resource input and carbon emission resource input of the power system;

[0023] For each inter-provincial transmission project in the power system, determine the target voltage level of the inter-provincial transmission project and the resource input amount under the target voltage level; the target voltage level is the simulated voltage level under the condition of the lowest unit resource input amount of the inter-provincial transmission project;

[0024] Based on the O&M resource input, carbon emission resource input, resource input for each inter-provincial transmission project at the target voltage level, and a pre-built total resource input objective function, determine the optimal O&M resource input, optimal carbon emission resource input, and optimal resource input for each inter-provincial transmission project at the target voltage level while minimizing the total resource input;

[0025] Based on the target voltage levels of multiple inter-provincial transmission projects, the optimal operation and maintenance resource input and the optimal carbon emission resource input of the power system, and the optimal resource input of each inter-provincial transmission project under the target voltage level, the inter-provincial transmission project planning scheme is determined.

[0026] In a fifth aspect, the present application further provides a computer program product, comprising a computer program, which, when executed by a processor, implements the following steps:

[0027] Obtain the operation and maintenance resource input and carbon emission resource input of the power system;

[0028] For each inter-provincial transmission project in the power system, determine the target voltage level of the inter-provincial transmission project and the resource input amount under the target voltage level; the target voltage level is the simulated voltage level under the condition of the lowest unit resource input amount of the inter-provincial transmission project;

[0029] Based on the O&M resource input, carbon emission resource input, resource input for each inter-provincial transmission project at the target voltage level, and a pre-built total resource input objective function, determine the optimal O&M resource input, optimal carbon emission resource input, and optimal resource input for each inter-provincial transmission project at the target voltage level while minimizing the total resource input;

[0030] Based on the target voltage levels of multiple inter-provincial transmission projects, the optimal operation and maintenance resource input and the optimal carbon emission resource input of the power system, and the optimal resource input of each inter-provincial transmission project under the target voltage level, the inter-provincial transmission project planning scheme is determined.

[0031] The above-mentioned inter-provincial power transmission project planning scheme determination method, device, computer equipment, computer-readable storage medium and computer program product, during the entire process, when obtaining the operation and maintenance resource input and carbon emission resource input of the power system and the target voltage level with the lowest unit resource input, the problem of determining the inter-provincial power transmission project planning scheme is converted into a problem of solving objective functions related to the operation and maintenance resource input, carbon emission resource input, and resource input of each inter-provincial power transmission project at the target voltage level through a pre-constructed total resource input objective function, thereby reducing the planning difficulty of the inter-provincial power transmission project. Even when the power system is too large, it is possible to efficiently determine the optimal operation and maintenance resource input and optimal carbon emission resource input of the power system when the total resource input is minimized, as well as the optimal resource input of each inter-provincial power transmission project at the target voltage level, thereby improving the efficiency of determining the inter-provincial power transmission project planning scheme. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments of the present application or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 This is a diagram of an application environment of a method for determining an inter-provincial power transmission project planning scheme in one embodiment;

[0034] Figure 2 A flowchart of a method for determining an inter-provincial power transmission project planning scheme in one embodiment;

[0035] Figure 3 A flowchart of a method for determining an inter-provincial power transmission project planning scheme in another embodiment;

[0036] Figure 4 A structural block diagram of a device for determining an inter-provincial power transmission project planning scheme in one embodiment;

[0037] Figure 5 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0039] The method for determining the inter-provincial power transmission project planning scheme provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown, terminal 102 communicates with server 104 via a network. The data storage system can store data that server 104 needs to process. The data storage system can be integrated with server 104 or placed in the cloud or other network servers. The power system is actually a power system composed of regional power grids in several provinces.

[0040] The planner clicks the planning button in the terminal 102 interface, and the terminal 102 responds to the planner's click operation, obtains the operation and maintenance resource input and carbon emission resource input of the power system from the local, generates a planning scheme determination request based on the operation and maintenance resource input and carbon emission resource input of the power system, and sends the planning scheme determination request to the server 104. The server 104 extracts the operation and maintenance resource input and carbon emission resource input of the power system in the planning scheme determination request; for each inter-provincial transmission project in the power system, determines the target voltage level of the inter-provincial transmission project and the resource input under the target voltage level; the target voltage level is the unit resource input of the inter-provincial transmission project. The simulated voltage level is determined under the condition of the lowest input; based on the operation and maintenance resource input, carbon emission resource input, resource input of each inter-provincial transmission project at the target voltage level, and the pre-built total resource input objective function, the optimal operation and maintenance resource input, the optimal carbon emission resource input, and the optimal resource input of each inter-provincial transmission project at the target voltage level when the total resource input is minimized are determined; based on the target voltage levels of multiple inter-provincial transmission projects, the optimal operation and maintenance resource input and the optimal carbon emission resource input of the power system, and the optimal resource input of each inter-provincial transmission project at the target voltage level, the inter-provincial transmission project planning scheme is determined.

[0041] Terminal 102 may include, but is not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. IoT devices may include smart speakers, smart TVs, smart air conditioners, smart car devices, and projectors. Portable wearable devices may include smart watches, smart bracelets, and head-mounted devices. Head-mounted devices may include virtual reality (VR) devices, augmented reality (AR) devices, smart glasses, and the like. Server 104 may be a standalone physical server, a server cluster or distributed system consisting of multiple physical servers, or a cloud server providing cloud computing services.

[0042] In an exemplary embodiment, Figure 2 As shown in the figure, a method for determining the planning scheme of inter-provincial power transmission projects is provided. Figure 1 The server 104 in FIG. 1 is used as an example for explanation.

[0043] S200, obtaining the operation and maintenance resource input and carbon emission resource input of the power system.

[0044] The power system consists of regional power grids across several provinces. Operation and maintenance resource inputs include the operating and maintenance resource inputs for each province in the power system. Operation resource inputs refer to the operating resource inputs for generator sets, while maintenance resource inputs refer to the maintenance resource inputs for generator sets. The power system's operation and maintenance resource inputs are equal to the sum of the operating and maintenance resource inputs for all provinces in the power system. Carbon emission resource inputs refer to the resource inputs for carbon emissions under low-carbon policies. Both operation and maintenance resource inputs and carbon emission resource inputs are variable parameters.

[0045] Specifically, interprovincial transmission projects are transmission projects established between provinces within a power system. The method for determining interprovincial transmission project planning schemes essentially seeks to find an economically optimal plan for establishing transmission projects between all provinces in the power system. Therefore, when developing interprovincial transmission project plans, it is necessary to consider resource inputs across several dimensions to optimize the economic effectiveness of the planning scheme. These multi-dimensional resource inputs include, but are not limited to, resource inputs for power system operation and maintenance and carbon emissions.

[0046] In an exemplary embodiment, obtaining the operation and maintenance resource input of the power system is essentially obtaining the sum of the operation and maintenance resource input of each province in the power system, and obtaining the operation and maintenance resource input of each province in the power system can be achieved through the operation and maintenance plans of each province.

[0047] In one exemplary embodiment, obtaining the carbon emission resource input of the power system is essentially obtaining the sum of the carbon emission resource inputs of each province in the power system. Since the carbon emission resource input is equal to the product of carbon emissions and the unit carbon emission resource input, the sum of the carbon emission resource inputs of each province in the power system is equal to the product of the sum of the carbon emissions of each province in the power system and the unit carbon emission resource input. In other words, by obtaining the sum of the carbon emissions of each province in the power system and the unit carbon emission resource input, the carbon emission resource input of the power system can be further determined.

[0048] S400: For each inter-provincial power transmission project in the power system, determine a target voltage level of the inter-provincial power transmission project and a resource input amount under the target voltage level.

[0049] The target voltage level is the simulated voltage level that minimizes the unit resource input for interprovincial power transmission projects. In practice, simulated voltage levels are divided into AC and DC levels. For example, AC levels include 330kV, 500kV, 750kV, and 1000kV, while DC levels include ±500kV, ±800kV, and ±1100kV. Resource input actually refers to investment.

[0050] Specifically, the simulated voltage level includes more than one voltage level. For each inter-provincial transmission project in the power system, the corresponding unit resource input amount can be determined when simulating different simulated voltage levels. Based on the multiple unit resource input amounts of each inter-provincial transmission project at different simulated voltage levels, the simulated voltage level with the lowest unit resource input amount is determined and used as the target voltage level for the corresponding inter-provincial transmission project, until the target voltage levels for all inter-provincial transmission projects are determined.

[0051] Furthermore, the target voltage level of each inter-provincial power transmission project is used as the type of the corresponding inter-provincial power transmission project, and the resource input amount of each inter-provincial power transmission project under the type is determined.

[0052] S600, based on the operation and maintenance resource input, carbon emission resource input, resource input of each inter-provincial power transmission project at the target voltage level, and the pre-built total resource input objective function, determines the optimal operation and maintenance resource input, the optimal carbon emission resource input, and the optimal resource input of each inter-provincial power transmission project at the target voltage level when the total resource input is minimized.

[0053] The pre-built resource input objective function refers to the relationship between the total resource input and its multiple influencing factors. In this application, the factors affecting the determination of the inter-provincial transmission project planning scheme include the operation and maintenance resource input, the carbon emission resource input, and the resource input of each inter-provincial transmission project at the target voltage level.

[0054] Specifically, inter-provincial power transmission projects include direct current (DC) power transmission projects and alternating current (AC) power transmission projects. The amount of resource input for each inter-provincial power transmission project at the target voltage level is determined, that is, the amount of resource input for each DC power transmission project at the target voltage level and the amount of resource input for each AC power transmission project at the target voltage level are determined. Based on the sum of the amount of resource input for each DC power transmission project at the target voltage level and the amount of resource input for each AC power transmission project at the target voltage level, the amount of resource input for all inter-provincial power transmission projects in the power system at the target voltage level is obtained. In practical applications, the amount of resource input for all inter-provincial power transmission projects in the power system at the target voltage level can also be directly obtained based on the sum of the amount of resource input for each inter-provincial power transmission project at the target voltage level.

[0055] Obtain the pre-built total resource input objective function. Substitute the O&M resource input, carbon emission resource input, and resource input for all inter-provincial transmission projects at the target voltage level into the constructed total resource input objective function to obtain the total resource input.

[0056] For example, inter-provincial power transmission projects include DC transmission projects and AC transmission projects. Let the pre-built total resource input objective function be:

[0057]

[0058] in, is the amount of operation and maintenance resources invested in the power system, is the amount of operating resources input in the power system, is the amount of maintenance resources invested in the power system; It is the resource input of all inter-provincial transmission projects in the power system at the target voltage level. It is the sum of the resource inputs of each AC transmission project in the power system at the target voltage level. It is the sum of resource inputs of each DC transmission project in the power system at the target voltage level; It is the amount of carbon emission resource input in the power system.

[0059] Furthermore, since the O&M resource input, carbon emission resource input, and resource input for each inter-provincial transmission project at the target voltage level are all variable, the resulting total resource input is also variable. Since the lowest total resource input maximizes the economic benefits of inter-provincial transmission projects, when the total resource input is minimized, the optimal O&M resource input, the optimal carbon emission resource input, and the optimal resource input for all inter-provincial transmission projects at the target voltage level can be obtained. Based on the optimal resource input for all inter-provincial transmission projects at the target voltage level, the optimal resource input for each inter-provincial transmission project at the target voltage level can be further determined.

[0060] S800 determines the inter-provincial transmission project planning scheme based on the target voltage levels of multiple inter-provincial transmission projects, the optimal operation and maintenance resource input and the optimal carbon emission resource input of the power system, and the optimal resource input of each inter-provincial transmission project under the target voltage level.

[0061] Specifically, interprovincial transmission project planning needs to consider multiple factors, including but not limited to the type of interprovincial transmission project between two provinces in the power system, namely the target voltage level, the optimal amount of operation and maintenance resources and carbon emission resources for the power system, and the optimal amount of resources for each interprovincial transmission project at the target voltage level. Therefore, considering multiple planning dimensions, such as the target voltage level of multiple interprovincial transmission projects, the optimal amount of operation and maintenance resources and carbon emission resources for the power system, and the optimal amount of resources for each interprovincial transmission project at the target voltage level, can produce a more accurate interprovincial transmission project planning scheme.

[0062] For example, there are three provinces, A, B, and C, in the power system. The inter-provincial power transmission project plan can be: establish a DC transmission project with a target voltage level of Level 1 between Province A and Province B, establish an AC transmission project with a target voltage level of Level 2 between Province A and Province C, and establish a DC transmission project with a target voltage level of Level 3 between Province B and Province C; the operation and maintenance resource input of the power system is the optimal operation and maintenance resource input, that is, the sum of the optimal operation and maintenance resource input of Province A, Province B, and Province C is the optimal operation and maintenance resource input; the carbon emission resource input of the power system is the optimal carbon emission resource input; in the power system, the resource input of the Level 2 AC transmission project between Province A and Province C is the optimal resource input of the AC transmission project, the resource input of the Level 1 DC transmission project between Province A and Province B is the optimal resource input of the DC transmission project, and the sum of the resource input of the Level 3 DC transmission project between Province B and Province C is the optimal resource input of the DC transmission project.

[0063] In the above-mentioned method for determining the planning scheme of the inter-provincial power transmission project, when the operation and maintenance resource input and carbon emission resource input of the power system and the target voltage level with the lowest unit resource input are obtained, the problem of determining the planning scheme of the inter-provincial power transmission project is converted into a problem of solving the objective function related to the operation and maintenance resource input, carbon emission resource input, and resource input of each inter-provincial power transmission project at the target voltage level through the pre-constructed total resource input objective function, which reduces the planning difficulty of the inter-provincial power transmission project. Even when the scale of the power system is too large, the optimal operation and maintenance resource input and the optimal carbon emission resource input of the power system can be efficiently determined when the total resource input is minimized, as well as the optimal resource input of each inter-provincial power transmission project at the target voltage level, thereby improving the efficiency of determining the planning scheme of the inter-provincial power transmission project.

[0064] In an exemplary embodiment, Figure 3 As shown, S400 includes:

[0065] S420, for each inter-provincial power transmission project in the power system, obtaining the unit resource input of the inter-provincial power transmission project under different simulated voltage levels.

[0066] S440: Determine the simulated voltage level with the lowest unit resource input as the target voltage level.

[0067] S460: Obtain unit resource input and resource capacity at the target voltage level.

[0068] S480: Determine the resource input amount at the target voltage level based on the unit resource input amount and resource capacity at the target voltage level.

[0069] The simulated voltage level refers to the simulated voltage level of the inter-provincial transmission project, not the actual voltage level of the inter-provincial transmission project. Unit resource input refers to the ratio of resource input to transmission capacity, that is, the resource input corresponding to each unit of transmission capacity. Resource capacity is the transmission capacity of the inter-provincial transmission project at the target voltage level.

[0070] Specifically, the unit resource input of the inter-provincial power transmission project under different simulated voltage levels is obtained. Since this application is to determine the planning scheme with the highest economic benefits, the lower the unit resource input, the higher the economic benefits of the obtained planning scheme. Therefore, based on the unit resource input of the inter-provincial power transmission project under different simulated voltage levels, the simulated voltage level corresponding to the lowest unit resource input is screened from multiple simulated voltage levels, and it is determined as the target voltage level. Furthermore, the unit resource input is essentially the ratio of the resource input of the inter-provincial power transmission project under the target voltage level to the transmission capacity. Therefore, in order to determine the resource input, the unit resource input and resource capacity of the inter-provincial power transmission project under the target voltage level can be obtained, and based on the product of the unit resource input and resource capacity under the target voltage level, the resource input under the target voltage level can be obtained.

[0071] In the above embodiment, by determining the simulated voltage level with the lowest unit resource input as the target voltage level, the voltage level with the highest economic benefit can be screened out and used as the actual voltage level of the inter-provincial power transmission project in the planning scheme, thereby improving the accuracy of determining the inter-provincial power transmission project planning scheme.

[0072] In an exemplary embodiment, obtaining unit resource input of inter-provincial power transmission projects at different simulated voltage levels includes:

[0073] For each simulated voltage level, the distance between the two provinces of the inter-provincial power transmission project is obtained; the transmission capacity corresponding to the simulated voltage level is determined; based on the product of the distance between the two provinces and the preset unit distance resource input, and the product of the transmission capacity and the preset unit capacity resource input, the resource input of the inter-provincial power transmission project under the simulated voltage level is obtained; based on the ratio of the resource input to the transmission capacity, the unit resource input of the inter-provincial power transmission project under the simulated voltage level is determined.

[0074] Among them, the distance between two provinces refers to the distance between the centers of the two provinces; the transmission capacity refers to the capacity of the inter-provincial transmission project to transmit electricity under the simulated voltage level; the preset unit distance resource input refers to the preset resource input for each unit distance taking into account the differences in land prices among different provinces; the preset unit preset capacity resource input refers to the preset resource input for each unit transmission capacity taking into account the differences in land prices among different provinces.

[0075] Specifically, each simulated voltage level of the inter-provincial power transmission project is simulated to obtain the unit resource input of the inter-provincial power transmission project under different simulated voltage levels.

[0076] For each inter-provincial power transmission project under each simulated voltage level, determine the two provinces associated with the inter-provincial power transmission project and obtain the distance between the two provinces associated with the inter-provincial power transmission project. For example, if the inter-provincial power transmission project is a power transmission project between provinces n and m, then obtain the distance x between the centers of provinces n and m. n，m , as the distance between the two provinces.

[0077] The transmission capacity corresponding to the simulated voltage level is different in the cases of AC and DC. Therefore, it is necessary to first determine whether the inter-provincial transmission project is an AC transmission project or a DC transmission project, and then determine the transmission capacity of the AC transmission project under the simulated voltage level, or the transmission capacity of the DC transmission project under the simulated voltage level.

[0078] Determining the transmission capacity of the AC transmission project under the simulated voltage level includes: obtaining a correlation between the transmission capacity of the AC transmission project under the simulated voltage level and the distance between two provinces; and obtaining the transmission capacity of the AC transmission project under the simulated voltage level based on the distance between the two provinces corresponding to the AC transmission project and the correlation between the transmission capacity and the distance between the two provinces.

[0079] For example, for the kth simulated voltage level, the correlation relationship between the transmission capacity of the AC transmission project between province n and province m is:

[0080]

[0081] Among them, i is a settable positive integer. is the transmission capacity of the AC transmission project between provinces n and m under the kth simulated voltage level, 、 、 、 The parameters of the polynomial fitting curve of the correlation relationship can be determined by the historical transportation capacity data and the distance between the two provinces corresponding to the historical transportation capacity data.

[0082] And the AC transmission project under the kth simulated voltage level has the corresponding maximum transmission capacity and maximum conveying distance , the transmission distance x of the AC transmission project does not exceed the maximum transmission distance , the transmission capacity of AC transmission projects Not exceeding the maximum conveying capacity That is to say, 、 .

[0083] Determining the transmission capacity of the DC transmission project under the simulated voltage level includes: the DC transmission project has a fixed transmission capacity corresponding to each simulated voltage level. By determining the simulated voltage level, the fixed transmission capacity corresponding to the simulated voltage level can be determined. That is, for the kth simulated voltage level, the transmission capacity of the DC transmission project between provinces n and m is The association relationship is: ,in, is the fixed transmission capacity of the kth simulated voltage level.

[0084] After obtaining the interprovincial distance of the interprovincial transmission project and the transmission capacity corresponding to the simulated voltage level, the resource input of the interprovincial transmission project at the simulated voltage level can be determined based on the transmission capacity corresponding to the interprovincial distance and the simulated voltage level. The resource input of the interprovincial transmission project at the simulated voltage level includes the distance resource input and the capacity resource input.

[0085] When the inter-provincial power transmission project is an AC power transmission project, obtain the preset unit distance resource input under the kth simulated voltage level , based on the distance x between the two provinces n，m Resource input from the preset unit distance The product of distance and resource input is determined Furthermore, since the substations in each province are an important part of the AC transmission project, the preset unit capacity resource input is obtained based on the sum of the unit capacity resource input of the substations in each province associated with the inter-provincial transmission project. Based on the delivery capacity Compared with the preset unit capacity resource input The product of the capacity resources is used to determine the input amount ( ) . Based on the amount of distance resource input and capacity resource investment The sum of the resources input of the AC transmission project under the kth simulated voltage level is obtained. .

[0086] When the inter-provincial power transmission project is a DC power transmission project, obtain the preset unit distance resource input under the kth simulated voltage level , based on the distance x between the two provinces n，m Resource input from the preset unit distance The product of distance resources is used to determine the input amount. Furthermore, since the converter stations in each province are an important part of the DC transmission project, the preset unit capacity resource input is obtained based on the sum of the unit capacity resource input of the converter stations in each province associated with the inter-provincial transmission project. Based on the delivery capacity Compared with the preset unit capacity resource input The product of the capacity resources is used to determine the input amount. . Based on the amount of distance resource input and capacity resource investment The sum of the resources invested in the DC transmission project under the kth simulated voltage level is obtained. .

[0087] Furthermore, different analog voltage levels are screened based on the amount of resource input.

[0088] First, based on the maximum transmission distance under the simulated voltage level, the simulated voltage level is preliminarily screened. Specifically, for the AC transmission project under the kth simulated voltage level: the distance between the two provinces x n，m ≤Maximum conveying distance ; For the DC transmission project under the kth simulated voltage level: the distance between the two provinces x n，m ≤Maximum conveying distance , that is, based on the maximum transmission distance, the analog voltage level is preliminarily screened.

[0089] Secondly, based on the amount of resource input and transport capacity The ratio of the unit resource input of the AC transmission project under the simulated voltage level is determined. ; Based on resource input and transport capacity The ratio of the unit resource input of the AC transmission project under the simulated voltage level is determined. .

[0090] The simulated voltage levels are screened by unit resource input, and the simulated voltage level with the lowest unit resource input is determined as the target voltage level for the inter-provincial power transmission project.

[0091] In the above embodiment, when the inter-provincial power transmission projects are AC power transmission projects and DC power transmission projects respectively, the resource input amount of the inter-provincial power transmission project under the simulated voltage level is accurately obtained based on the product of the distance between the two provinces and the preset unit distance resource input amount, and the product of the transmission capacity and the preset unit capacity resource input amount. Then, the target voltage level can be accurately screened from different simulated voltage levels through the unit resource input amount determined by the resource input amount.

[0092] In an exemplary embodiment, based on the operation and maintenance resource input, the carbon emission resource input, the resource input of each inter-provincial power transmission project at the target voltage level, and a pre-built total resource input objective function, determining the optimal operation and maintenance resource input, the optimal carbon emission resource input, and the optimal resource input of each inter-provincial power transmission project at the target voltage level when the total resource input is minimized includes:

[0093] Based on the target voltage levels of multiple inter-provincial transmission projects, the power consumption constraints of each province and the inter-provincial transmission capacity constraints are determined; when the power system meets the power consumption constraints of each province, the inter-provincial transmission capacity constraints and the preset low-carbon constraints, based on the operation and maintenance resource input, the carbon emission resource input, the resource input of each inter-provincial transmission project at the target voltage level, and the pre-constructed total resource input objective function, the optimal operation and maintenance resource input, the optimal carbon emission resource input, and the optimal resource input of each inter-provincial transmission project at the target voltage level are determined when the total resource input is minimized.

[0094] Specifically, when determining the optimal O&M resource input, the optimal carbon emission resource input, and the optimal resource input for each inter-provincial transmission project at the target voltage level based on the total resource input objective function, all while minimizing the total resource input, multi-dimensional constraints must be met. These constraints include the power consumption constraints of each province, the inter-provincial transmission capacity constraints, and the preset low-carbon constraints. In other words, the optimal O&M resource input, the optimal carbon emission resource input, and the optimal resource input for each inter-provincial transmission project at the target voltage level, all while minimizing the total resource input, must be determined based on the total resource input objective function only when the power consumption of each province in the power system satisfies its own power consumption constraints, the inter-provincial transmission projects between provinces meet the inter-provincial transmission capacity constraints, and the power system meets the preset low-carbon constraints.

[0095] Furthermore, the power consumption constraints for each province and the inter-provincial transmission capacity constraints are determined based on the target voltage levels of multiple inter-provincial transmission projects in the power system. Therefore, when determining the power consumption constraints for a province, the target voltage levels of multiple inter-provincial transmission projects associated with that province can be used to determine the power consumption constraints for that province. The inter-provincial transmission capacity constraints between any two provinces can be determined based on the target voltage levels of the inter-provincial transmission projects between them.

[0096] In the above embodiment, only when the power system satisfies the power consumption constraints of each province, the inter-provincial transmission capacity constraints and the preset low-carbon constraints, the optimal operation and maintenance resource input, the optimal carbon emission resource input, and the optimal resource input of each inter-provincial transmission project at the target voltage level are determined based on the operation and maintenance resource input, the carbon emission resource input, the resource input of each inter-provincial transmission project at the target voltage level, and the pre-constructed total resource input objective function. This improves the accuracy of determining the optimal operation and maintenance resource input, the optimal carbon emission resource input, and the optimal resource input of each inter-provincial transmission project at the target voltage level, thereby obtaining an accurate and more economical inter-provincial transmission project planning scheme, and the obtained inter-provincial transmission project planning scheme has good green and low-carbon characteristics.

[0097] In an exemplary embodiment, based on target voltage levels of multiple inter-provincial power transmission projects, determining power consumption constraints for each province includes:

[0098] For each target province, based on the target voltage levels of multiple inter-provincial transmission projects associated with the target province, the inter-provincial transmission power associated with the target province is obtained; the power generation power and power load of the target province are obtained; based on the inter-provincial transmission power, power generation power, and power load, the power quantity constraint conditions of the target province in the power system are determined.

[0099] The target province is any province in the power system. The power consumption constraint condition means that the power supply and consumption in a province are kept in a dynamic balance at all times.

[0100] Specifically, for target province n, the power supply within province n can be defined as the power load at time t. The power consumption within province n includes several consumption factors, including: the generated power of various types of generators within province n at time t, the inter-provincial transmission power of the DC transmission lines of the DC transmission projects connected to province n at time t, and the inter-provincial transmission power of the AC transmission lines of the AC transmission projects connected to province n at time t. Furthermore, the inter-provincial transmission power of the DC transmission lines of the DC transmission projects connected to province n at time t can be determined by the target voltage level of each DC transmission project, and the inter-provincial transmission power of the AC transmission lines of the AC transmission projects connected to province n at time t can be determined by the target voltage level of each AC transmission project.

[0101] In order to maintain a dynamic balance between the supply and consumption of electricity in the target province at all times, the power constraint condition of the target province at time t can be determined as follows: the power generation power of each type of generator set in n provinces at time t + the inter-provincial transmission power of the DC transmission lines of the DC transmission project connected to n provinces at time t + the inter-provincial transmission power of the AC transmission lines of the AC transmission project connected to n provinces at time t = power load.

[0102] Let the power load be L n，t , the power generation of each type of generator set in province n at time t is The inter-provincial transmission power of the DC transmission line of the DC transmission project connecting n provinces at time t is The inter-provincial transmission power of the DC transmission line of the DC transmission project connecting n provinces at time t is , determine the power consumption constraint of the target province at time t as:

[0103]

[0104] in, is the total number of types of generator sets, is the total number of AC transmission projects connected to province n, is the total number of DC transmission projects connected to province n.

[0105] In the above embodiment, by establishing power and electricity constraints based on inter-provincial transmission power, power generation power, and power load, it is possible to impose a certain degree of constraints on the power and electricity of the province when planning the inter-provincial power transmission project, so that the power supply and consumption in the target province are always kept in dynamic balance.

[0106] In an exemplary embodiment, determining inter-provincial transmission capacity constraints based on target voltage levels of multiple inter-provincial transmission projects includes:

[0107] Based on the target voltage levels of multiple inter-provincial transmission projects, the rated transmission capacity of the inter-provincial transmission projects is obtained; based on the rated transmission capacity, the inter-provincial transmission capacity constraint conditions are determined.

[0108] Among them, the inter-provincial transmission capacity constraint means that the inter-provincial transmission power should not exceed the power limit of the inter-provincial transmission project.

[0109] Specifically, for each inter-provincial power transmission project, the rated transmission capacity of the inter-provincial power transmission project is obtained, and the rated transmission capacity is determined based on the target voltage level of the inter-provincial power transmission project. Different target voltage levels determine different rated transmission capacities.

[0110] Furthermore, obtaining the rated transmission capacity of the inter-provincial transmission project includes obtaining the rated transmission capacity of the AC transmission project and the rated transmission capacity of the DC transmission project. Based on the rated transmission capacity of the AC transmission project, the inter-provincial transmission capacity constraint of the AC transmission project is determined; based on the rated transmission capacity of the DC transmission project, the inter-provincial transmission capacity constraint of the DC transmission project is determined.

[0111] In an exemplary embodiment, for an AC power transmission project between provinces n and m, based on the rated transmission capacity of the AC power transmission project , determine the inter-provincial transmission capacity constraints of AC transmission projects .in, The transmission capacity at time t in an AC transmission project. In other words, the absolute value of the transmission capacity at time t in an AC transmission project cannot exceed the rated transmission capacity.

[0112] In an exemplary embodiment, for a DC transmission project between provinces n and m, based on the rated transmission capacity of the DC transmission project , determine the inter-provincial transmission capacity constraints of DC transmission projects .in, is the resource capacity of the DC transmission project at the target voltage level at time t. In other words, in a DC transmission project, the absolute value of the resource capacity at time t cannot exceed the rated transmission capacity.

[0113] In the above embodiment, by determining the inter-provincial transmission capacity constraint, it is possible to ensure that the absolute value of the transmission capacity of the inter-provincial transmission project at time t does not exceed the rated transmission capacity, thereby accurately determining the inter-provincial transmission project planning scheme that meets the inter-provincial transmission capacity constraint.

[0114] In one embodiment, the preset low-carbon constraint condition refers to limiting the total amount of CO2 emitted by the power system. The preset low-carbon constraint condition includes: .in, is the total number of generator set types, is the carbon emission factor of the i-th type of generator set, is the total number of provinces in the power system, T is the total number of calculation periods of the pre-built resource input total objective function, Emission limits for the power system.

[0115] In an exemplary embodiment, the method for determining an inter-provincial power transmission project planning scheme further includes: when the inter-provincial transmission power and the generated power of the target province meet the power load, determining that the power system meets the power consumption constraints of each province.

[0116] The method for determining the inter-provincial power transmission project planning scheme further includes: obtaining the resource capacity of each inter-provincial power transmission project at the target voltage level; and determining that the power system meets the inter-provincial power transmission capacity constraint condition when the resource capacity of each inter-provincial power transmission project meets the rated transmission capacity;

[0117] The method for determining the inter-provincial power transmission project planning scheme also includes: obtaining the total amount of carbon emissions in the power system; and determining that the power system meets the low-carbon constraint conditions when the total amount of carbon emissions in the power system is less than or equal to the preset carbon emission limit.

[0118] Specifically, for any target province in the power system, when the inter-provincial transmission power and power generation power of the target province meet the power load, that is, when all provinces in the power system meet the power and electricity constraints of the corresponding provinces, the power system is determined to meet the power and electricity constraints of each province; when the inter-provincial transmission power and power generation power of any target province do not meet the power load, the power system is determined to not meet the power and electricity constraints of each province.

[0119] For any inter-provincial transmission project in the power system, when the resource capacity of the inter-provincial transmission project meets the rated transmission capacity, that is, when the absolute value of the resource capacity of all AC transmission projects is less than or equal to the rated transmission capacity of the AC transmission project, and the absolute value of the resource capacity of all DC transmission projects is less than or equal to the rated transmission capacity of the DC transmission project, the power system is determined to meet the inter-provincial transmission capacity constraint.

[0120] For the total carbon emissions in the power system, first, obtain the total carbon emissions in the power system, where the total carbon emissions in the power system = .in, is the total number of generator set types, is the carbon emission factor of the i-th type of generator set, is the total number of provinces in the power system, and T is the total number of calculation periods of the pre-built resource input total objective function. Less than or equal to the preset carbon emission limit In the case of , it is determined that the power system meets the low-carbon constraint conditions.

[0121] Furthermore, the unit carbon emission resource input amount is obtained, and the carbon emission resource input amount can be determined based on the total carbon emissions in the power system and the unit carbon emission resource input amount.

[0122] In the above embodiment, the accuracy of inter-provincial transmission project planning is improved by achieving the optimal operation and maintenance resource input, the optimal carbon emission resource input, and the optimal resource input for each inter-provincial transmission project at the target voltage level under the condition that the inter-provincial transmission power and the power generation power in the target province meet the power load, the resource capacity of each inter-provincial transmission project meets the rated transmission capacity, and the total carbon emissions in the power system are less than or equal to the preset carbon emission limit.

[0123] In one embodiment, after determining the inter-provincial power transmission project planning scheme based on the target voltage levels of multiple inter-provincial power transmission projects, the optimal operation and maintenance resource input and the optimal carbon emission resource input of the power system, and the optimal resource input of each inter-provincial power transmission project under the target voltage level, the planning results can also be evaluated through the levelized power consumption index and carbon emission reduction index.

[0124] Specifically, It is the optimal amount of operation and maintenance resource input in the power system. is the optimal operating resource input in the power system. is the optimal maintenance resource input in the power system, It is the optimal resource input of all inter-provincial transmission projects in the power system at the target voltage level. It is the sum of the optimal resource inputs of each AC transmission project in the power system at the target voltage level. It is the sum of the optimal resource inputs of each DC transmission project in the power system at the target voltage level. is the optimal carbon emission resource input in the power system, then based on the optimal operation and maintenance resource input , optimal carbon emission resource input , and the optimal resource input for each inter-provincial transmission project at the target voltage level , get the minimum value of the total resource input .

[0125] make is the total number of generator set types, is the total number of provinces in the power system, and T is the total number of calculation periods for the pre-built resource input total objective function. The total power generation of each province in the power system during the entire period is determined as .

[0126] Minimum value based on total resource input Total power generation of each province in the power system at all times , determine the levelized electricity index .

[0127] Further, Considered as the minimum value of the total resource input under the low-carbon situation, the minimum value of the total resource input without considering low-carbon is obtained. , obtain carbon emissions considering low carbon , carbon emissions without considering low carbon , based on the minimum total resource input under low-carbon considerations , the minimum total resource input without considering low carbon , Carbon emissions considering low carbon , and carbon emissions without considering low carbon , determine carbon emission reduction targets .

[0128] Based on the levelized electricity index and carbon emission reduction indicators , and evaluate the planning schemes for inter-provincial power transmission projects.

[0129] In a specific application example, there are three provinces in the power system, namely A, B, and C. Inter-provincial power transmission projects are established between Province A and Province B, between Province A and Province C, and between Province B and Province C. The inter-provincial power transmission projects can be either direct current (DC) or alternating current (AC) power transmission projects. The planning process of the inter-provincial power transmission projects aims to maximize the economic benefits of the power system. The method for determining the inter-provincial power transmission project planning scheme includes:

[0130] S1. From the simulated voltage levels, preliminarily screen the voltage levels of inter-provincial transmission projects that may be built between any two provinces of A, B, and C. Specifically, an inter-provincial transmission project built between any two provinces may have any simulated voltage level. Therefore, the simulated voltage levels of the inter-provincial transmission projects can be preliminarily screened based on the maximum transmission distance of the inter-provincial transmission project under each simulated voltage level. For example, assuming that a Level 1 AC transmission project is built between provinces A and B, the maximum transmission distance of a Level 1 AC transmission project is 200 km. However, the distance between provinces A and B is 300 km, so a Level 1 AC transmission project cannot be built between provinces A and B.

[0131] S2. Based on the voltage levels of the inter-provincial transmission projects that may be constructed between any two of the three selected provinces A, B, and C, determine the unit investment cost of each inter-provincial transmission project at each voltage level. Based on the unit investment cost of each inter-provincial transmission project at each voltage level, determine the optimal target voltage level corresponding to each inter-provincial transmission project.

[0132] Specifically, taking the inter-provincial transmission project between provinces A and B as an example, the distance between provinces A and B is obtained. Based on the correlation between transmission capacity and distance at the kth simulated voltage level, the transmission capacity of the inter-provincial transmission project between provinces n and m at the kth simulated voltage level is determined.

[0133] Furthermore, for each inter-provincial power transmission project, based on the product of the distance between provinces A and B and the preset unit distance resource input, as well as the product of the transmission capacity and the preset unit preset capacity resource input, the resource input amount, i.e., the investment cost, of the inter-provincial power transmission project under the kth simulated voltage level is obtained.

[0134] Based on the ratio of investment cost to transmission capacity, the unit investment cost of the inter-provincial transmission project at the kth simulated voltage level is determined. The unit investment costs of the inter-provincial transmission project at all simulated voltage levels are compared, and the simulated voltage level corresponding to the lowest unit investment cost is determined. This simulated voltage level is then determined as the target voltage level.

[0135] S3. Considering the power consumption constraints of each province, the inter-provincial transmission capacity constraints and the preset low-carbon constraints, and assuming that the power system meets the power consumption constraints of each province, the inter-provincial transmission capacity constraints and the preset low-carbon constraints, based on the pre-built system-wide power generation cost objective function, determine the optimal operation and maintenance cost, the optimal carbon emission resource cost, and the optimal investment cost of each inter-provincial transmission project at the target voltage level when the system-wide power generation cost is minimized.

[0136] Among them, the power consumption constraints of each province refer to:

[0137] Let the power load be L n，t , the power generation of each type of generator set in province n at time t is The inter-provincial transmission power of the DC transmission line of the DC transmission project connecting n provinces at time t is The inter-provincial transmission power of the DC transmission line of the DC transmission project connecting n provinces at time t is , determine the power consumption constraint of the target province at time t as:

[0138]

[0139] in, is the total number of types of generator sets, is the total number of AC transmission projects connected to province n, is the total number of DC transmission projects connected to province n.

[0140] Inter-provincial transmission capacity constraints refer to: 、 .in, is the resource capacity of the DC transmission project at the target voltage level at time t, is the transmission capacity at time t in the AC transmission project, is the rated transmission capacity of the AC transmission project, It is the rated transmission capacity of the DC transmission project.

[0141] The preset low-carbon constraints limit the total amount of CO2 emitted by the power system. The preset low-carbon constraints include: .in, is the total number of generator set types, is the carbon emission factor of the i-th type of generator set, is the total number of provinces in the power system, T is the total number of calculation periods of the pre-built resource input total objective function, Emission limits for the power system.

[0142] The pre-built objective function for total resource input is: .

[0143] in, is the operation and maintenance cost in the power system, is the operating cost in the power system, is the maintenance cost in the power system; is the investment cost of all inter-provincial transmission projects in the power system at the target voltage level, It is the sum of the investment costs of each AC transmission project in the power system at the target voltage level. It is the sum of the investment costs of all DC transmission projects in the power system at the target voltage level; is the cost of carbon emissions in the power system. Including: Obtaining carbon emission resources , determine the carbon emission cost based on the amount of carbon emission resources and the unit carbon emission cost.

[0144] S4. Determine the inter-provincial transmission project planning scheme based on the target voltage level of the inter-provincial transmission project between any two provinces A, B, and C, the optimal operation and maintenance cost of the power system, the optimal carbon emission resource cost, and the optimal investment cost of each inter-provincial transmission project at the target voltage level when the power generation cost of the entire system is minimized.

[0145] S5. Determine the levelized cost per kilowatt-hour (LCOE) and carbon emission reduction cost indicators for the inter-provincial power transmission project planning scheme, and conduct a comprehensive analysis of the inter-provincial power transmission project planning scheme based on the levelized cost per LCOE and carbon emission reduction cost indicators.

[0146] The method for determining the planning scheme of inter-provincial transmission projects in this application can be used to analyze the economically optimal planning scheme of full-voltage AC and DC transmission projects between any two provinces across the region, and provide guidance and suggestions for the layout of inter-provincial transmission networks in the construction of new power systems; by adding the current typical low-carbon policies as mathematical constraints to the total resource input objective function, the impact of energy policies on the capacity expansion planning of transmission projects in new power systems can be analyzed; the mixed integer programming problem of traditional transmission network planning can be transformed into a continuous linear programming problem, reducing the difficulty of solving the total resource input objective function, improving the universality of the method for determining the planning scheme of inter-provincial transmission projects, and solving the problem of a significant decrease in computational efficiency and accuracy when the power grid system is large, with better economic efficiency and green and low-carbon characteristics.

[0147] It should be understood that, although the steps in the flowcharts of the above embodiments are shown in sequence as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be performed in other orders. Moreover, at least a portion of the steps in the flowcharts of the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily to be performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0148] Based on the same inventive concept, embodiments of the present application also provide an apparatus for determining an inter-provincial power transmission project planning scheme for implementing the aforementioned method for determining an inter-provincial power transmission project planning scheme. The implementation solution provided by this apparatus is similar to the implementation solution described in the aforementioned method. Therefore, the specific limitations in one or more embodiments of the apparatus for determining an inter-provincial power transmission project planning scheme provided below can be found in the limitations of the method for determining an inter-provincial power transmission project planning scheme described above and will not be repeated here.

[0149] In an exemplary embodiment, Figure 4 As shown, a device 900 for determining an inter-provincial power transmission project planning scheme is provided, comprising: an acquisition module 200, a determination module 400, a processing module 600 and a planning module 800, wherein:

[0150] An acquisition module 200 is used to acquire the operation and maintenance resource input and carbon emission resource input of the power system;

[0151] Determination module 400 is used to determine, for each inter-provincial transmission project in the power system, a target voltage level of the inter-provincial transmission project and the resource input amount at the target voltage level; the target voltage level is a simulated voltage level when the unit resource input amount of the inter-provincial transmission project is the lowest;

[0152] Processing module 600 is configured to determine, based on the operation and maintenance resource input, the carbon emission resource input, the resource input of each inter-provincial transmission project at the target voltage level, and a pre-established total resource input objective function, the optimal operation and maintenance resource input, the optimal carbon emission resource input, and the optimal resource input of each inter-provincial transmission project at the target voltage level, when the total resource input is minimized;

[0153] The planning module 800 is used to determine the inter-provincial transmission project planning scheme based on the target voltage levels of multiple inter-provincial transmission projects, the optimal operation and maintenance resource input and the optimal carbon emission resource input of the power system, and the optimal resource input of each inter-provincial transmission project under the target voltage level.

[0154] In one embodiment, the determination module 400 is also used to obtain the unit resource input of the inter-provincial power transmission project under different simulated voltage levels; determine the simulated voltage level with the lowest unit resource input as the target voltage level; obtain the unit resource input and resource capacity under the target voltage level; and determine the resource input under the target voltage level based on the unit resource input and resource capacity under the target voltage level.

[0155] In one embodiment, the determination module 400 is further used to obtain the inter-provincial distance of the inter-provincial power transmission project for each simulated voltage level; determine the transmission capacity corresponding to the simulated voltage level; obtain the resource input of the inter-provincial power transmission project under the simulated voltage level based on the product of the inter-provincial distance and the preset unit distance resource input, and the product of the transmission capacity and the preset unit capacity resource input; and determine the unit resource input of the inter-provincial power transmission project under the simulated voltage level based on the ratio of the resource input to the transmission capacity.

[0156] In one embodiment, the processing module 600 is further used to determine the power consumption constraints of each province and the inter-provincial transmission capacity constraints based on the target voltage levels of multiple inter-provincial transmission projects; when the power system satisfies the power consumption constraints of each province, the inter-provincial transmission capacity constraints and the preset low-carbon constraints, based on the operation and maintenance resource input, the carbon emission resource input, the resource input of each inter-provincial transmission project at the target voltage level, and the pre-constructed total resource input objective function, determine the optimal operation and maintenance resource input, the optimal carbon emission resource input, and the optimal resource input of each inter-provincial transmission project at the target voltage level when the total resource input achieves the minimum value.

[0157] In one embodiment, the processing module 600 is also used to obtain, for each target province, the inter-provincial transmission power associated with the target province based on the target voltage levels of multiple inter-provincial transmission projects associated with the target province; obtain the power generation power and power load of the target province; and determine the power quantity constraint conditions of the target province in the power system based on the inter-provincial transmission power, power generation power, and power load.

[0158] In one embodiment, the processing module 600 is further configured to obtain the rated transmission capacity of the inter-provincial power transmission project based on the target voltage levels of each of the plurality of inter-provincial power transmission projects; and determine the inter-provincial power transmission capacity constraint condition based on the rated transmission capacity.

[0159] In one embodiment, the inter-provincial power transmission project planning scheme determination device 900 also includes a constraint module, which is used to determine that the power system meets the power consumption constraint conditions of each province when the inter-provincial transmission power and power generation power of the target province meet the power load; the constraint module is also used to obtain the resource capacity of each inter-provincial power transmission project under the target voltage level; when the resource capacity of each inter-provincial power transmission project meets the rated transmission capacity, the power system is determined to meet the inter-provincial transmission capacity constraint condition; the constraint module is also used to obtain the total amount of carbon emissions in the power system; when the total amount of carbon emissions in the power system is less than or equal to the preset carbon emission limit, the power system is determined to meet the low-carbon constraint condition.

[0160] Each module in the above-mentioned inter-provincial power transmission project planning scheme determination device can be implemented in whole or in part through software, hardware, or a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the corresponding operations of each of the above modules.

[0161] In an exemplary embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as shown in FIG. Figure 5As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O) and a communication interface. The processor, memory and input / output interface are connected via a system bus, and the communication interface is connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the computer device is used to store data such as a pre-built total resource input objective function. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a method for determining an inter-provincial power transmission project planning scheme is implemented.

[0162] Those skilled in the art will understand that Figure 5 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0163] In one embodiment, a computer device is further provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps in the above method embodiments when executing the computer program.

[0164] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0165] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0166] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile memory 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 various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), quantum computing-based data processing logic devices, artificial intelligence (AI) processors, and the like.

[0167] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, 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 application.

[0168] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A method for determining an inter-provincial power transmission project planning scheme, characterized in that: The method comprises: Obtain the operation and maintenance resource input and carbon emission resource input of the power system; For each inter-provincial power transmission project in the power system, obtaining the unit resource input amount of the inter-provincial power transmission project under different simulated voltage levels, determining the simulated voltage level with the lowest unit resource input amount as the target voltage level, obtaining the unit resource input amount and resource capacity under the target voltage level, and determining the resource input amount under the target voltage level based on the unit resource input amount and the resource capacity under the target voltage level; Determining the power consumption constraints of each province and the inter-provincial transmission capacity constraints based on the target voltage levels of the plurality of inter-provincial transmission projects; Under the condition that the power system satisfies the power consumption constraints of each province, the inter-provincial transmission capacity constraints and the preset low-carbon constraints, based on the operation and maintenance resource input, the carbon emission resource input, the resource input of each inter-provincial transmission project at the target voltage level and the pre-constructed total resource input objective function, determine the optimal operation and maintenance resource input, the optimal carbon emission resource input and the optimal resource input of each inter-provincial transmission project at the target voltage level when the total resource input is minimized; wherein the pre-constructed total resource input objective function is a function that minimizes the sum of the operation and maintenance resource input in the power system, the resource input of all inter-provincial transmission projects in the power system at the target voltage level and the carbon emission resource input in the power system; Based on the target voltage levels of multiple inter-provincial power transmission projects, the optimal operation and maintenance resource input and the optimal carbon emission resource input of the power system, and the optimal resource input of each inter-provincial power transmission project at the target voltage level, the inter-provincial power transmission project planning scheme is determined.

2. The method according to claim 1, characterized in that The obtaining of the unit resource input of the inter-provincial power transmission project under different simulated voltage levels includes: For each simulated voltage level, obtaining the inter-provincial distance of the inter-provincial power transmission project; Determining a transmission capacity corresponding to the simulated voltage level; Obtaining the resource input amount of the inter-provincial power transmission project at the simulated voltage level based on the product of the distance between the two provinces and the preset resource input amount per unit distance and the product of the transmission capacity and the preset resource input amount per unit capacity; Based on the ratio of the resource input amount to the transmission capacity, the unit resource input amount of the inter-provincial power transmission project at the simulated voltage level is determined.

3. The method according to claim 1, characterized in that Determining the power consumption constraint conditions of each province based on the target voltage levels of the plurality of inter-provincial power transmission projects includes: For each target province, based on target voltage levels of the plurality of inter-provincial power transmission projects associated with the target province, obtaining the inter-provincial transmission power associated with the target province; Obtaining the power generation capacity and power load of the target province; Based on the inter-provincial transmission power, the generated power and the power load, a power quantity constraint condition of the target province in the power system is determined.

4. The method according to claim 1, wherein The determining of the inter-provincial power transmission capacity constraint condition based on the target voltage levels of the plurality of inter-provincial power transmission projects includes: Obtaining a rated transmission capacity of the inter-provincial power transmission project based on the target voltage levels of each of the plurality of inter-provincial power transmission projects; Based on the rated transmission capacity, inter-provincial transmission capacity constraint conditions are determined.

5. The method according to claim 3, characterized in that The method further comprises: When the inter-provincial transmission power and the generated power of the target province satisfy the power load, it is determined that the power system satisfies the power quantity constraint conditions of each province.

6. The method according to claim 4, characterized in that The method further comprises: Obtaining the resource capacity of each of the inter-provincial power transmission projects at the target voltage level; When the resource capacity of each inter-provincial power transmission project satisfies the rated transmission capacity, determining that the power system satisfies the inter-provincial power transmission capacity constraint condition; Obtaining the total amount of carbon emissions in the power system; When the total carbon emissions in the power system are less than or equal to a preset carbon emission limit, it is determined that the power system meets the low-carbon constraint condition.

7. A device for determining a planning scheme for an inter-provincial power transmission project, characterized in that: The device comprises: An acquisition module is used to obtain the operation and maintenance resource input and carbon emission resource input of the power system; a determination module configured to obtain, for each inter-provincial power transmission project in the power system, unit resource input amounts of the inter-provincial power transmission project under different simulated voltage levels, determine the simulated voltage level with the lowest unit resource input amount as the target voltage level, obtain the unit resource input amount and resource capacity under the target voltage level, and determine the resource input amount under the target voltage level based on the unit resource input amount and the resource capacity under the target voltage level; a processing module for determining, based on the target voltage levels of the plurality of inter-provincial power transmission projects, power consumption constraints and inter-provincial power transmission capacity constraints for each province; and, when the power system satisfies the power consumption constraints for each province, the inter-provincial power transmission capacity constraints, and preset low-carbon constraints, determining, based on the operation and maintenance resource input, the carbon emission resource input, the resource input of each inter-provincial power transmission project at the target voltage level, and a pre-constructed total resource input objective function, an optimal operation and maintenance resource input, an optimal carbon emission resource input, and an optimal resource input of each inter-provincial power transmission project at the target voltage level when the total resource input is minimized; wherein the pre-constructed total resource input objective function is a function that minimizes the sum of the operation and maintenance resource input in the power system, the resource input of all inter-provincial power transmission projects in the power system at the target voltage level, and the carbon emission resource input in the power system; A planning module is used to determine the inter-provincial power transmission project planning scheme based on the target voltage levels of multiple inter-provincial power transmission projects, the optimal operation and maintenance resource input and the optimal carbon emission resource input of the power system, and the optimal resource input of each inter-provincial power transmission project under the target voltage level.

8. The device according to claim 7, characterized in that The determination module is also used to obtain the unit resource input of the inter-provincial power transmission project under different simulated voltage levels; determine the simulated voltage level with the lowest unit resource input as the target voltage level; obtain the unit resource input and resource capacity under the target voltage level; and determine the resource input under the target voltage level based on the unit resource input and resource capacity under the target voltage level.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

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

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