Cross-provincial and cross-regional available power transmission capacity calculation method, system, device and storage medium

Abstract

The application belongs to the technical field of power system automation, and discloses a cross-provincial and cross-regional available power transmission capacity calculation method, system, device and storage medium. The method comprises the following steps: according to the geographical position of the node and the power grid congestion, the nodes in the cross-provincial and cross-regional power network to be calculated are distributed to different regions to form a network region set and a regional node set; based on the network region set and the regional node set, a constraint condition is used to solve a pre-established available power transmission capacity optimization model to obtain a cross-provincial and cross-regional available power transmission capacity result; and the cross-provincial and cross-regional available power transmission capacity result is output. The application promotes the optimized allocation and integration of market resources, optimizes the available power transmission capacity of the transmission line, and reduces the waste of resources in market construction. The application has extremely important significance for guaranteeing the balance and safety of the power system, promoting the mutual aid of the surplus and the deficiency in a larger range of the whole network, and promoting the large-scale consumption of clean energy.

Description

Technical Field

[0001] This invention belongs to the field of power system automation technology, and specifically relates to a method, system, equipment and storage medium for calculating available transmission capacity across provinces and regions. Background Technology

[0002] With the rapid increase in clean energy installed capacity and the continuous rise in the overall grid load level, the demand for cross-provincial and cross-regional power grid surplus and deficit mutual assistance is growing. In the future, the safe and economical operation of the entire grid will face more challenges, requiring more efficient dispatching methods and safer grid constraint methods to plan and allocate grid operation resources to ensure the safe and stable operation of the power system.

[0003] Currently, driven by the construction and reform of the unified electricity market, inter-provincial electricity spot trading, as an effective market-based electricity trading mechanism on the day-ahead and intraday time scales, is playing a very important role. It is of great significance for ensuring the balance and security of the power system, promoting the mutual assistance of surplus and shortage across the entire network, and promoting the large-scale consumption of clean energy.

[0004] However, the current mechanism for determining the available transmission capacity of cross-provincial and cross-regional transmission lines is not perfect. In the process of determining the available transmission capacity, the constraints on transmission lines to ensure grid security are more stringent, making it impossible to fully utilize the available transmission capacity and to promote the full play of the cross-provincial and cross-regional surplus and shortage mutual assistance role of the inter-provincial spot market. Summary of the Invention

[0005] The purpose of this invention is to provide a method, system, device, and storage medium for calculating available power transmission capacity across provinces and regions, in order to solve the technical problems of inaccurate and insufficient capacity calculation in the prior art, promote the optimal allocation and integration of market resources, and improve transaction efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a method for calculating available power transmission capacity across provinces and regions, including:

[0008] Based on the geographical location of the nodes and the grid congestion, the nodes in the inter-provincial and inter-regional power network whose available transmission capacity is to be calculated are assigned to different regions, forming a network region set and a sub-region node set;

[0009] Based on the network region set and the sub-regional node set, the pre-established available transmission capacity optimization model is solved by calling the constraint conditions to obtain the cross-provincial and cross-regional available transmission capacity results.

[0010] Output the results of the available power transmission capacity across provinces and regions.

[0011] A further improvement of this invention is that the step of allocating nodes in an inter-provincial and inter-regional power network to be calculated with available transmission capacity to different regions based on the geographical location of the node and the grid congestion situation, thereby forming a network region set and a sub-regional node set, specifically includes:

[0012] All nodes in each region are equivalent to one node and the inter-regional transmission line is simplified to one; then, based on the geographical location of the node and the grid congestion situation, the node is allocated to the inter-provincial and inter-regional power network with available transmission capacity.

[0013]

[0014] Z is the set of all regions; Z i It is the i-th region;

[0015]

[0016] N Z It is the set of all nodes within region Z;

[0017]

[0018] It is the i-th node in region Z; Indicates the Zth i The nth node of a region.

[0019] A further improvement of this invention is that the expression for the available transmission capacity optimization model is:

[0020]

[0021] in, Indicates the Zth i The load expenditure cost of the j-th node in a region. Indicates the Zth i The load power of the j-th node in a region, Indicates the Zth i The power generation cost of the j-th node in a region, Indicates the Zth i The power generation of the j-th node in a region.

[0022] A further improvement of the present invention is that the constraints include: power balance constraints and transmission line constraints.

[0023] A further improvement of the present invention is that the power balance constraint includes:

[0024]

[0025] Representing region Z i The net input power of the j-th node;

[0026]

[0027] Representing region Z i The input power;

[0028]

[0029] This represents the balance between the overall load and power generation output of the power grid.

[0030] A further improvement of the present invention is that the power balance constraint includes:

[0031]

[0032] This represents the power flow of the k-th transmission line; Representing region Z i Input power;

[0033]

[0034] Formula 13 indicates that the power flow of the k-th transmission line does not exceed the capacitance of the corresponding branch.

[0035] in, Representing region Z i The power distribution factor for the k-th transmission line;

[0036]

[0037] in, It is region Z i The power transfer distribution factor of the j-th node to the k-th transmission line; Indicates the Zth i The power generation shift key of the j-th node in each region;

[0038]

[0039] A further improvement of the present invention is that the cross-provincial and cross-regional available power transmission capacity result includes: the feasible region of available power transmission capacity.

[0040] Secondly, the present invention provides a device for calculating available power transmission capacity across provinces and regions, comprising:

[0041] The allocation module is used to allocate nodes in the inter-provincial and inter-regional power network with available transmission capacity to be calculated to different regions based on the geographical location of the node and the grid congestion situation, forming a network region set and a sub-region node set.

[0042] The solution module is used to solve the pre-established available transmission capacity optimization model based on the network region set and the sub-region node set, and to obtain the cross-provincial and cross-regional available transmission capacity results.

[0043] The output module is used to output the results of the available power transmission capacity across provinces and regions;

[0044] The expression for the available transmission capacity optimization model is as follows:

[0045]

[0046] in, Indicates the Zth i The load expenditure cost of the j-th node in a region. Indicates the Zth i The load power of the j-th node in a region, Indicates the Zth i The power generation cost of the j-th node in a region, Indicates the Zth i The power generation of the j-th node in a region.

[0047] Thirdly, the present invention provides an electronic device, including a processor and a memory, wherein the processor is used to execute a computer program stored in the memory to implement the method for calculating the available power transmission capacity across provinces and regions.

[0048] Fourthly, the present invention provides a computer-readable storage medium storing at least one instruction, which, when executed by a processor, implements the method for calculating available power transmission capacity across provinces and regions.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] This invention provides a method, system, device, and storage medium for calculating available transmission capacity across provinces and regions. The method includes: allocating nodes in the cross-provincial and cross-regional power network to be calculated to different regions based on the geographical location of the nodes and the grid congestion situation, forming a network region set and a sub-regional node set; based on the network region set and the sub-regional node set, calling the constraint conditions to solve a pre-established available transmission capacity optimization model to obtain the cross-provincial and cross-regional available transmission capacity result; and outputting the cross-provincial and cross-regional available transmission capacity result. This invention uses a power flow method for modeling, further optimizing the available transmission capacity of transmission lines, reducing resource waste in market construction, and lowering the difficulty and complexity of market scheduling, thus providing a guarantee for further promoting the safe and stable operation of the market. It is of great significance for ensuring the balance and security of the power system, promoting the mutual assistance of surplus and shortage on a larger scale across the entire network, and promoting the large-scale consumption of clean energy.

[0051] Furthermore, the proposed method for calculating cross-provincial and cross-regional available transmission capacity based on power flow clarifies the determination of partition nodes, the objective for solving available transmission capacity, the calculation of generation shift keys and power transmission distribution factor matrices, the determination of constraints for calculating available transmission capacity based on power flow, and the determination of the feasible region of available transmission capacity. The proposed optimization model for available transmission capacity solves the problems of inaccurate and insufficient capacity calculations, reducing the difficulty of market operation. From the perspective of the overall utility provided by market operation, the above method can promote the optimal allocation and integration of market resources. Attached Figure Description

[0052] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0053] Figure 1 This is a flowchart illustrating a method for calculating available power transmission capacity across provinces and regions according to the present invention.

[0054] Figure 2 This is a diagram of the power grid network structure in Example 2;

[0055] Figure 3 A schematic diagram to confirm the feasible region of available transmission capacity;

[0056] Figure 4 This is a flowchart illustrating another method for calculating available power transmission capacity across provinces and regions according to the present invention.

[0057] Figure 5 This is a schematic diagram of the structure of a cross-provincial and cross-regional available power transmission capacity calculation device according to the present invention;

[0058] Figure 6This is a structural block diagram of an electronic device according to the present invention. Detailed Implementation

[0059] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0060] The following detailed description is exemplary and intended to provide further detailed explanation of the invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this invention is for describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention.

[0061] Example 1

[0062] This invention provides a method for calculating available power transmission capacity across provinces and regions, comprising the following steps:

[0063] S101. Node Determination in Different Regions: Based on the geographical location of the nodes and the grid congestion situation, nodes in the inter-provincial and inter-regional power network with available transmission capacity to be calculated are allocated to different regions, forming a network region set and a sub-regional node set. In one specific implementation, the allocation is as follows: all nodes in each region are equivalent to one node, and the inter-regional transmission line is also simplified to one. Then, based on the geographical location of the nodes and the grid congestion situation, the nodes are allocated to the inter-provincial and inter-regional power network with available transmission capacity.

[0064]

[0065] Z is the set of all regions; Z i It is the i-th region.

[0066]

[0067] N Z It is the set of all nodes within region Z.

[0068]

[0069] It is the i-th node in region Z; Indicates the Zth i The nth node of a region.

[0070] S102. Available Transmission Capacity Optimization Model: Under the condition of safe grid operation, the calculation of available transmission capacity must satisfy the maximization of social welfare within the calculation network. Generally, the maximization of social welfare within the network can be expressed as the difference between the total cost of load usage at each node and the total generation cost at each node, expressed as:

[0071]

[0072] in, Indicates the Zth i The load expenditure cost of the j-th node in a region. Indicates the Zth i The load power of the j-th node in a region, Indicates the Zth i The power generation cost of the j-th node in a region, Indicates the Zth i The power generation of the j-th node in a region.

[0073] S103, calculation of power generation shift key and power transfer distribution factor matrix:

[0074] (1) Calculation of generation shift key: The generation shift key represents the impact of regional power injection on the power injection at a certain node, and its expression is:

[0075]

[0076] in, Indicates the Zth i The power generation shift key of the j-th node in each region;

[0077] (2) Calculation of the regional power transmission distribution factor matrix: Calculate the power transmission distribution factor of a transmission line to a region, and sum the effects of the transmission line on the power distribution of nodes within the region. The expression is as follows:

[0078]

[0079] in, It is region Z i The power transfer distribution factor of the j-th node to the k-th transmission line Representing region Z i The power transmission distribution factor for the k-th transmission line.

[0080] Then region Z i The power transfer distribution factor matrix for each transmission line can be expressed as:

[0081]

[0082] Among them, l CBThis is the set of critical branches.

[0083] The inter-regional power transfer distribution factor can be expressed as:

[0084]

[0085] in, Representing region Z i For region Z i0 The power transfer distribution factor matrix.

[0086] S104. Determination of constraints for calculating available transmission capacity based on power flow:

[0087] (1) Power balance constraint: At any given moment, the overall load of the power grid and the power generation output should be balanced.

[0088]

[0089] Representing region Z i The net input power of the j-th node; N represents NET, and I represents in.

[0090]

[0091] Representing region Z i The input power.

[0092]

[0093] This represents the balance between the overall load and power generation output of the power grid.

[0094] (2) Transmission line constraints

[0095]

[0096] This represents the power flow of the k-th transmission line; Representing region Z i The input power.

[0097]

[0098] Formula 13 indicates that the power flow of the k-th transmission line does not exceed the capacitance of that branch.

[0099] S105. Determination of the feasible region of available transmission capacity: Calculate the feasible region of available transmission capacity based on the above-mentioned solution objective and related constraints.

[0100] Example 2

[0101] Please see Figure 2 As shown, this invention provides a method for calculating available power transmission capacity across provinces and regions, including the following steps:

[0102] Step 101: Partition Node Determination: Based on the geographical location of the nodes and the power grid congestion situation, the nodes in the network are assigned to different regions, forming a network region set and a sub-region node set. This embodiment shows 3 regions, each containing only 1 node.

[0103]

[0104]

[0105]

[0106] Step 102: Determining the Objective for Available Transmission Capacity. Under the condition of safe grid operation, the calculation of available transmission capacity must satisfy the maximization of social welfare within the network. Generally, maximizing social welfare within the network can be expressed as the difference between the total cost incurred by each node in using the load and the total generation cost of each node. In this example, the costs incurred by each node and the generation cost are as follows:

[0107]

[0108] The objective can then be solved using transmission capacity:

[0109]

[0110] Step 103: Calculate the generation shift key and power transmission distribution factor matrix, and calculate and characterize the impact of each transmission line on the power transmission distribution of the region. In this system, there is only one branch between each region. If congestion occurs, at least one of the three branches will have exceeded its limit. Therefore, all three branches are critical branches. Furthermore, region 3 is considered the balancing node, and the GSK of generators G1 and G2 is equal to 1. The PTDF variable from region 1 to region 3 is [1 1 1], which means that if the injected power of G1 is 1MW, the power flow of all three branches will increase by 1MW. The PTDF variable from region 2 to region 3 is [1 / 3 2 / 3 1 / 3].

[0111] Using the above method, the power transfer distribution factor matrix can be calculated as follows:

[0112]

[0113] Step 104: Determine the constraints for calculating the available transmission capacity based on power flow, clarify the power balance constraints of the power grid network, the impact of transmission lines on regional power transmission distribution, and transmission limit constraints.

[0114] The capacities of the three key branches are 30, 30, and 20 MW, respectively. The branch capacity variables can be written as:

[0115] C l =[30 30 20] T (20)

[0116] The injection power variables for Region 1 and Region 2 are set as follows:

[0117] P in =[P1 P2] T (twenty one)

[0118] If the power flow of each critical branch does not exceed the limit, the following constraints should be met:

[0119] PTDF·P in ≤C l (twenty two)

[0120] It can be written as:

[0121]

[0122] Step 105: Determining the Feasible Region of Available Transmission Capacity: Based on the above-mentioned objective and relevant constraints, calculate the feasible region of available transmission capacity. Using P1 and P2 as the x and y axes respectively, the feasible region of available transmission capacity can be obtained, which is the maximum feasible region under all critical branch constraints, such as... Figure 3 As shown in the shaded area.

[0123] Example 3

[0124] Please see Figure 4 As shown, this invention provides a method for calculating available power transmission capacity across provinces and regions, including:

[0125] S1. Based on the geographical location of the node and the grid congestion, the nodes in the inter-provincial and inter-regional power network whose available transmission capacity is to be calculated are allocated to different regions to form a network region set and a sub-region node set.

[0126] S2. Based on the network area set and the sub-regional node set, call the constraint conditions to solve the pre-established available transmission capacity optimization model to obtain the cross-provincial and cross-regional available transmission capacity results;

[0127] S3. Output the results of the available power transmission capacity across provinces and regions.

[0128] In one specific implementation, the step of allocating nodes in an inter-provincial and inter-regional power network to which the available transmission capacity to be calculated is to different regions based on the geographical location of the node and the grid congestion situation, thereby forming a network region set and a sub-regional node set, specifically includes:

[0129] All nodes in each region are equivalent to one node and the inter-regional transmission line is simplified to one; then, based on the geographical location of the node and the grid congestion situation, the node is allocated to the inter-provincial and inter-regional power network with available transmission capacity.

[0130]

[0131] Z is the set of all regions; Z i It is the i-th region;

[0132]

[0133] N Z It is the set of all nodes within region Z;

[0134]

[0135] It is the i-th node in region Z; Indicates the Zth i The nth node of a region.

[0136] In one specific embodiment, the expression for the available transmission capacity optimization model is:

[0137]

[0138] in, Indicates the Zth i The load expenditure cost of the j-th node in a region. Indicates the Zth i The load power of the j-th node in a region, Indicates the Zth i The power generation cost of the j-th node in a region, Indicates the Zth i The power generation of the j-th node in a region.

[0139] In one specific implementation, the constraints include: power balance constraints and transmission line constraints.

[0140] In one specific embodiment, the power balance constraint includes:

[0141]

[0142] Representing region Z i The net input power of the j-th node;

[0143]

[0144] Representing region Z i Input power;

[0145]

[0146] This represents the balance between the overall load and power generation output of the power grid.

[0147] In one specific embodiment, the power balance constraint includes:

[0148]

[0149] This represents the power flow of the k-th transmission line; Representing region Z i Input power;

[0150]

[0151] Formula 13 indicates that the power flow of the k-th transmission line does not exceed the capacitance of the corresponding branch.

[0152] in, Representing region Z i The power distribution factor for the k-th transmission line;

[0153]

[0154] in, It is region Z i The power transfer distribution factor of the j-th node to the k-th transmission line; Indicates the Zth i The power generation shift key of the j-th node in each region;

[0155]

[0156] In one specific implementation, the cross-provincial and cross-regional available power transmission capacity results include: the feasible region of available power transmission capacity.

[0157] Example 4

[0158] Please see Figure 5 As shown, the present invention provides a device for calculating available power transmission capacity across provinces and regions, comprising:

[0159] The allocation module is used to allocate nodes in the inter-provincial and inter-regional power network with available transmission capacity to be calculated to different regions based on the geographical location of the node and the grid congestion situation, forming a network region set and a sub-region node set.

[0160] The solution module is used to solve the pre-established available transmission capacity optimization model based on the network region set and the sub-region node set, and to obtain the cross-provincial and cross-regional available transmission capacity results.

[0161] The output module is used to output the results of the available power transmission capacity across provinces and regions.

[0162] In one specific implementation, the step of allocating nodes in an inter-provincial and inter-regional power network to which the available transmission capacity to be calculated is to different regions based on the geographical location of the node and the grid congestion situation, thereby forming a network region set and a sub-regional node set, specifically includes:

[0163] All nodes in each region are equivalent to one node and the inter-regional transmission line is simplified to one; then, based on the geographical location of the node and the grid congestion situation, the node is allocated to the inter-provincial and inter-regional power network with available transmission capacity.

[0164]

[0165] Z is the set of all regions; Z i It is the i-th region;

[0166]

[0167] N Z It is the set of all nodes within region Z;

[0168]

[0169] It is the i-th node in region Z; Indicates the Zth i The nth node of a region.

[0170] In one specific embodiment, the expression for the available transmission capacity optimization model is:

[0171]

[0172] in, Indicates the Zth i The load expenditure cost of the j-th node in a region. Indicates the Zth i The load power of the j-th node in a region, Indicates the Zth i The power generation cost of the j-th node in a region, Indicates the Zth i The power generation of the j-th node in a region.

[0173] In one specific implementation, the constraints include: power balance constraints and transmission line constraints.

[0174] In one specific embodiment, the power balance constraint includes:

[0175]

[0176] Representing region Z i The net input power of the j-th node;

[0177]

[0178] Representing region Z i Input power;

[0179]

[0180] This represents the balance between the overall load and power generation output of the power grid.

[0181] In one specific embodiment, the power balance constraint includes:

[0182]

[0183] This represents the power flow of the k-th transmission line; Representing region Z i Input power;

[0184]

[0185] Formula 13 indicates that the power flow of the k-th transmission line does not exceed the capacitance of the corresponding branch.

[0186] in, Representing region Z i The power distribution factor for the k-th transmission line;

[0187]

[0188] in, It is region Z i The power transfer distribution factor of the j-th node to the k-th transmission line; Indicates the Zth i The power generation shift key of the j-th node in each region;

[0189]

[0190] In one specific implementation, the cross-provincial and cross-regional available power transmission capacity results include: the feasible region of available power transmission capacity.

[0191] Example 5

[0192] Please see Figure 3 As shown, the present invention also provides an electronic device 100 for realizing a method for calculating available power transmission capacity across provinces and regions; the electronic device 100 includes a memory 101, at least one processor 102, a computer program 103 stored in the memory 101 and capable of running on the at least one processor 102, and at least one communication bus 104.

[0193] The memory 101 can be used to store the computer program 103. The processor 102 implements the steps of any of the methods for calculating cross-provincial and cross-regional available transmission capacity described in embodiments 1 to 3 by running or executing the computer program stored in the memory 101 and calling the data stored in the memory 101. The memory 101 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the electronic device 100 (such as audio data), etc. In addition, the memory 101 may include non-volatile memory, such as hard disk, memory, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0194] The at least one processor 102 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The processor 102 may be a microprocessor or any conventional processor. The processor 102 is the control center of the electronic device 100, connecting various parts of the electronic device 100 via various interfaces and lines.

[0195] The memory 101 in the electronic device 100 stores multiple instructions to implement a method for calculating available power transmission capacity across provinces and regions, and the processor 102 can execute the multiple instructions to achieve the following:

[0196] Based on the geographical location of the nodes and the grid congestion, the nodes in the inter-provincial and inter-regional power network whose available transmission capacity is to be calculated are assigned to different regions, forming a network region set and a sub-region node set;

[0197] Based on the network region set and the sub-regional node set, the pre-established available transmission capacity optimization model is solved by calling the constraint conditions to obtain the cross-provincial and cross-regional available transmission capacity results.

[0198] Output the results of the available power transmission capacity across provinces and regions.

[0199] Example 6

[0200] If the modules / units integrated in the electronic device 100 are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, and a read-only memory (ROM). Those skilled in the art should understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0201] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0202] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0203] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0204] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for calculating the usable transmission capacity across provinces and regions, characterized in that, include: Based on the geographical location of the nodes and the grid congestion, the nodes in the inter-provincial and inter-regional power network whose available transmission capacity is to be calculated are assigned to different regions, forming a network region set and a sub-region node set; Based on the network region set and the sub-regional node set, the pre-established available transmission capacity optimization model is solved by calling the constraint conditions to obtain the cross-provincial and cross-regional available transmission capacity results. Output the results of the available power transmission capacity across provinces and regions; The step of allocating nodes in the inter-provincial and inter-regional power network to be calculated with available transmission capacity to different regions based on the geographical location of the nodes and the grid congestion situation, forming a network region set and a sub-regional node set, specifically includes: All nodes in each region are equivalent to one node and the inter-regional transmission line is simplified to one; then, based on the geographical location of the node and the grid congestion situation, the node is allocated to the inter-provincial and inter-regional power network with available transmission capacity. (1) Z is the set of all regions; It is the i-th region; (2) It is the set of all nodes within region Z; (3) It is the i-th node in region Z; Indicates the first The nth node of each region; The constraints include: power balance constraints and transmission line constraints; The power balance constraints include: (12) Indicates the first Power flow of a transmission line; Indicates the region The input power; (13) Formula 13 represents the first The power flow of a transmission line shall not exceed the capacitance of the corresponding branch. ; in, Indicates the region For the Power distribution factor of a transmission line; (6) in, It is a region No. The node is the first Power distribution factor of a transmission line; Indicates the first The first region The power generation shift key of each node; (5)； The results of available power transmission capacity across provinces and regions include: feasible regions of available power transmission capacity.

2. The method for calculating available inter-provincial and inter-regional power transmission capacity according to claim 1, characterized in that, The expression for the available transmission capacity optimization model is as follows: (4) in, Indicates the first The first region The load expenditure cost of each node, Indicates the first The first region The load power of each node, Indicates the first The first region The power generation cost per node, Indicates the first The first region The power generation of each node.

3. The method for calculating available inter-provincial and inter-regional power transmission capacity according to claim 1, characterized in that, The power balance constraints include: (9) Indicates the region The Net input power of each node; (10) Indicates the region The input power; (11) This represents the balance between the overall load of the power grid and the power generation output.

4. A cross-provincial and cross-regional power transmission capacity calculation device, characterized in that, include: The allocation module is used to allocate nodes in the inter-provincial and inter-regional power network with available transmission capacity to be calculated to different regions based on the geographical location of the node and the grid congestion situation, forming a network region set and a sub-region node set. The solution module is used to solve the pre-established available transmission capacity optimization model based on the network region set and the sub-region node set, and to obtain the cross-provincial and cross-regional available transmission capacity results. The output module is used to output the results of the available power transmission capacity across provinces and regions; The expression for the available transmission capacity optimization model is as follows: (4) in, Indicates the first The first region The load expenditure cost of each node, Indicates the first The first region The load power of each node, Indicates the first The first region The power generation cost per node, Indicates the first The first region The power generation capacity of each node; The step of allocating nodes in the inter-provincial and inter-regional power network to be calculated with available transmission capacity to different regions based on the geographical location of the nodes and the grid congestion situation, forming a network region set and a sub-regional node set, specifically includes: All nodes in each region are equivalent to one node and the inter-regional transmission line is simplified to one; then, based on the geographical location of the node and the grid congestion situation, the node is allocated to the inter-provincial and inter-regional power network with available transmission capacity. (1) Z is the set of all regions; It is the i-th region; (2) It is the set of all nodes within region Z; (3) It is the i-th node in region Z; Indicates the first The nth node of each region; The constraints include: power balance constraints and transmission line constraints; The power balance constraints include: (12) Indicates the first Power flow of a transmission line; Indicates the region The input power; (13) Formula 13 represents the first The power flow of a transmission line shall not exceed the capacitance of the corresponding branch. ; in, Indicates the region For the Power distribution factor of a transmission line; (6) in, It is a region No. The node is the first Power distribution factor of a transmission line; Indicates the first The first region The power generation shift key of each node; (5)； The results of available power transmission capacity across provinces and regions include: feasible regions of available power transmission capacity.

5. An electronic device, characterized in that, It includes a processor and a memory, the processor being used to execute a computer program stored in the memory to implement the method for calculating cross-provincial and cross-regional available transmission capacity as described in any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one instruction, which, when executed by a processor, implements the method for calculating cross-provincial and cross-regional available transmission capacity as described in any one of claims 1 to 3.

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