Flexible alternating current transmission device and power source combined planning configuration method and terminal device

Abstract

The application belongs to the technical field of power grid and provides a flexible alternating current transmission device and power source joint planning configuration method and terminal equipment, the method comprises the following steps: determining a target function and a constraint condition according to the operation parameters of a power system, an equivalent model of a general flexible alternating current transmission device, decision variables of a flexible alternating current transmission device configuration scheme and decision variables of a power source planning scheme, and establishing a joint configuration model according to the target function and the constraint condition; solving the joint configuration model to obtain multiple planning configuration schemes; evaluating the multiple planning configuration schemes, and taking the planning configuration scheme with the optimal evaluation result as a target planning configuration scheme. The application comprehensively considers the influence between power source planning and flexible alternating current transmission device configuration, jointly configures the two, obtains a power source planning scheme and a flexible alternating current transmission device configuration scheme, and improves the accuracy of power source planning and flexible alternating current transmission device configuration.

Description

Technical Field

[0001] This invention belongs to the field of power grid technology, and in particular relates to a method for the joint planning and configuration of flexible AC transmission devices and power sources, as well as terminal equipment. Background Technology

[0002] Flexible Alternative Current Transmission Systems (FACTS) can rapidly and flexibly alter power flow distribution in the power grid, improving grid stability. Simultaneously, they can effectively increase transmission capacity and reduce transmission costs, providing a guarantee for the development of smart grids and possessing broad market prospects. Power planning aims to meet the power supply needs of different regions and is closely related to power supply and power system operation. Since the configuration of FACTS systems affects power system operation, the configuration of FACTS systems and power planning are mutually influential.

[0003] In the existing technology, neither the planning of power sources nor the configuration of flexible AC transmission devices takes into account their mutual influence, which affects the accuracy of power source planning and the configuration of flexible AC transmission devices. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a method for joint planning and configuration of flexible AC transmission devices and power sources, as well as a terminal device, to solve the problem that the planning of power sources and the configuration of flexible AC transmission devices in the prior art do not take into account their mutual influence, thus affecting accuracy.

[0005] A first aspect of this invention provides a method for the joint planning and configuration of flexible AC transmission devices and power sources, comprising:

[0006] Obtain the operating parameters of the power system;

[0007] Establish an equivalent model for a general flexible AC transmission system, and determine the decision variables for the configuration scheme of the flexible AC transmission system based on the equivalent model; determine the decision variables for the power planning scheme.

[0008] Based on the operating parameters of the power system, the equivalent model of the general flexible AC transmission device, the decision variables of the flexible AC transmission device configuration scheme and the decision variables of the power planning scheme, the objective function and constraints are determined, and a joint configuration model is established based on the objective function and constraints.

[0009] Solving the joint configuration model yields multiple planning configuration schemes;

[0010] Multiple planning configuration schemes are evaluated, and the planning configuration scheme with the best evaluation result is taken as the target planning configuration scheme; among them, the target planning configuration scheme includes: flexible AC transmission equipment configuration scheme and power supply planning scheme.

[0011] A second aspect of the present invention provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of the joint planning and configuration method of flexible AC transmission device and power supply as provided in the first aspect of the present invention.

[0012] A third aspect of the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the joint planning and configuration method for flexible AC transmission devices and power sources provided in the first aspect of the present invention.

[0013] This invention provides a method and terminal equipment for the joint planning and configuration of flexible AC transmission equipment and power sources. The method includes: determining an objective function and constraints based on the operating parameters of the power system, an equivalent model of a general flexible AC transmission equipment, decision variables for the flexible AC transmission equipment configuration scheme, and decision variables for the power source planning scheme; establishing a joint configuration model based on the objective function and constraints; solving the joint configuration model to obtain multiple planning configuration schemes; evaluating the multiple planning configuration schemes, and selecting the optimal planning configuration scheme as the target planning configuration scheme. This invention comprehensively considers the influence between power source planning and flexible AC transmission equipment configuration, and jointly configures the two to obtain power source planning schemes and flexible AC transmission equipment configuration schemes, thereby improving the accuracy of power source planning and flexible AC transmission equipment configuration. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram illustrating the implementation process of a joint planning and configuration method for flexible AC transmission devices and power sources provided in an embodiment of the present invention.

[0016] Figure 2 This is an equivalent model diagram of a general flexible AC transmission device provided in an embodiment of the present invention;

[0017] Figure 3This is a schematic diagram of the joint planning and configuration device of flexible AC power transmission equipment and power supply provided in an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of a terminal device provided in an embodiment of the present invention. Detailed Implementation

[0019] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0020] To illustrate the technical solution of the present invention, specific embodiments are described below.

[0021] The rational configuration of flexible AC transmission equipment and the proper planning of power sources play an indispensable role in ensuring the reliable and safe operation of the power grid. In existing technologies, the configuration of flexible AC transmission equipment and the planning of power sources are carried out separately, without considering their mutual influence. However, since the configuration of flexible AC transmission equipment affects the operating status of the power system, and consequently influences power source planning, the configuration of flexible AC transmission equipment and power source planning are mutually influential. Therefore, planning them separately without considering their mutual impact is unscientific.

[0022] To address the above issues, this invention comprehensively considers the influence between power planning and flexible AC transmission device configuration, establishes an objective function and constraints covering the decision variables of both, and jointly configures them to obtain a power planning scheme and a flexible AC transmission device configuration scheme, thereby improving the accuracy and rationality of power planning and flexible AC transmission device configuration.

[0023] refer to Figure 1 This invention provides a method for the joint planning and configuration of flexible AC transmission equipment and power sources, including:

[0024] S101: Obtain operating parameters of the power system;

[0025] S102: Establish an equivalent model of a general flexible AC transmission device, and determine the decision variables for the configuration scheme of the flexible AC transmission device based on the equivalent model; determine the decision variables for the power planning scheme.

[0026] In some embodiments, S102 may include:

[0027] S1021: Establish an equivalent model for a general flexible AC transmission device.

[0028] There are three main types of flexible AC transmission equipment: parallel flexible AC transmission equipment, series flexible AC transmission equipment, and integrated flexible AC transmission equipment.

[0029] Based on the characteristics of three types of flexible AC transmission devices, this invention establishes a general equivalent model for flexible AC transmission devices. The flexible AC transmission device is configured on a section of a busbar on a certain line, where A and B are the two endpoints of line k. (See reference for details.) Figure 2 .

[0030] S1022: Determine the decision variables for the configuration scheme of flexible AC transmission equipment based on the equivalent model of general flexible AC transmission equipment.

[0031] Based on the above equivalent model of flexible AC transmission equipment, and referring to Figure 2 The decision variables that need to be determined for this flexible AC transmission device include: Q Fi m k φ k X Fk l k and d i See Table 1 for details. Among them, Q... Fi The reactive power capacity of the flexible AC transmission device configured at node i is m. k The voltage amplitude variation ratio (usually m) of the flexible AC transmission device configured on line k. k =1), φ k X is the voltage phase change angle of the flexible AC transmission device configured on line k. Fk Equivalent reactance of flexible AC transmission equipment configured on line k; Z lk R is the equivalent impedance of line k. Lk Let X be the equivalent resistance of line k. Lk Z is the equivalent reactance of line k. Lk =R Lk +jX Lk ;d i Configure the state variables of the flexible AC transmission device for node i, l k The state variables for configuring flexible AC transmission equipment on the k-th line; d i =1 and l k =1 indicates that node i of the k-th line is equipped with a flexible AC transmission device; d i =0 and l k =0 indicates that no flexible AC transmission device is installed at line k or node i;

[0032] The decision variables for the configuration scheme of flexible AC transmission equipment satisfy the following formula:

[0033]

[0034] Among them, the reactive power source capacity Q can be used. Fi Flexible adjustment of the voltage amplitude U at terminal A A .

[0035] Table 1. Decision Variables for General Flexible AC Transmission Systems

[0036]

[0037] The general equivalent model of flexible AC transmission devices provided in this invention is applicable to the analysis, calculation, and mathematical modeling of any single flexible AC transmission device. For example, for a series-type flexible AC transmission device, the parameter d does not exist. i Q Fi =0, m k =1, φ k =0, equivalent to the parallel side components being open-circuited, and the series side excluding X. Fk Other components are short-circuited; for parallel flexible AC transmission devices, parameter l is not present. k m k =1, φ k =0, X Fk =0, which is equivalent to a short circuit in all components on the series side. Similarly, this also applies to integrated flexible AC transmission systems. No switching between different models is required during configuration, resulting in good versatility and uniformity.

[0038] S Dk The capacity of the flexible AC transmission unit configured on the k-th line is an essential parameter for configuring the flexible AC transmission unit, but it is a secondary technical parameter and can be determined based on Q. Fi m k φ k and X Fk Therefore, it is not necessary to determine the capacity of the flexible AC transmission unit during the configuration process; it can be directly determined based on Q as specified in the target planning configuration scheme. Fi m k φ k and X Fk Four parameters are determined, S Dk The calculation formula is as follows:

[0039]

[0040] As shown above, the decision variables for the configuration scheme of flexible AC transmission equipment include the six parameters listed in Table 1. Meanwhile, S... Dk As an essential parameter for the configuration of flexible AC transmission equipment, along with the six parameters mentioned above, there are a total of seven parameters (Q). Fi m k φ kX Fk l k d i and S Dk Together, they constitute a flexible AC transmission device configuration scheme.

[0041] S1023: Determine the decision variables for the power planning scheme.

[0042] The decision variables for power planning schemes include: the location and capacity of the power supply connection (a i P i G These two parameters form the power planning scheme.

[0043] Among them, access location a i This indicates whether a new power source has been created at node i (i.e., the state variable indicating a new power source at node i), a i =1 indicates that a new power source has been created at node i, a i =0 indicates that no new power source has been created at node i. P i G Let be the active power capacity of the newly built power source at node i, which is a continuous real number greater than 0.

[0044] S103: Based on the operating parameters of the power system, the equivalent model of the general flexible AC transmission device, the decision variables of the flexible AC transmission device configuration scheme and the decision variables of the power planning scheme, determine the objective function and constraints, and establish a joint configuration model based on the objective function and constraints.

[0045] Based on the above analysis, there are 7 parameters for the configuration of flexible AC transmission equipment and 2 parameters for power planning, totaling 9 parameters (Q). Fi m k φ k X Fk l k d i a i P i G and S Dk Together, they constitute the joint configuration scheme (the solution process does not consider S). Dk In this embodiment of the invention, the above-mentioned excluding S is used. Dk The eight external parameters (Q) Fi m k φ k X Fk l k d i a i P i GUsing the power system's operating parameters as decision variables, the objective function and constraints are determined, and a joint configuration model of the power source and flexible AC transmission equipment is established, taking into account the relationship between the two.

[0046] S104: Solve the joint configuration model to obtain multiple planning configuration schemes.

[0047] S105: Evaluate multiple planning configuration schemes and take the planning configuration scheme with the best evaluation result as the target planning configuration scheme; among which, the target planning configuration scheme includes: flexible AC transmission equipment configuration scheme and power supply planning scheme.

[0048] Artificial intelligence algorithms can be used to solve the joint configuration model. If the solution yields multiple planning schemes, these schemes can be evaluated using a specific evaluation index to select the optimal planning configuration scheme as the target planning configuration scheme. For example, the evaluation index could be the transmission margin of the transmission section. The scheme with the largest transmission margin of the transmission section would then be selected as the target planning configuration scheme.

[0049] This invention comprehensively considers the influence between power planning and flexible AC transmission device configuration, and jointly configures the two, thereby improving the accuracy of both power planning and flexible AC transmission device configuration. Furthermore, this invention can simultaneously obtain both power planning schemes and flexible AC transmission device configuration schemes, resulting in higher planning efficiency.

[0050] In some embodiments, S103 may include:

[0051] S1031: Based on the operating parameters of the power system, the equivalent model of the general flexible AC transmission device, the decision variables of the flexible AC transmission device configuration scheme, and the decision variables of the power supply planning scheme, determine multiple evaluation indicators of the power system.

[0052] S1032: Determine the objective function based on multiple evaluation indicators.

[0053] In some embodiments, multiple evaluation metrics include: configuration economic cost, total life cycle cost, power flow distribution balance, and node voltage deviation.

[0054] The objective function may include:

[0055] min{λ1δ1(CO+LCC)+λ2(λ3δ3BA+λ4δ4DE)}

[0056] λ1+λ2=1

[0057] λ3+λ4=1

[0058] Where CO is the configuration economic cost, LCC is the life cycle cost, BA is the power flow distribution balance, DE is the node voltage deviation, λ1, λ2, λ3, and λ4 are weighting coefficients, and δ1, δ3, and δ4 are normalization coefficients.

[0059] In some embodiments, λ1 = λ2 = 0.5, λ3 = 0.7, and λ4 = 0.3.

[0060] Specifically, various weighting coefficients can be set according to actual application needs.

[0061] In some embodiments, the formula for calculating the configuration economic cost CO can be:

[0062]

[0063] Minimizing costs has always been a primary objective in various engineering projects within power systems. Unlike the configuration costs of flexible AC transmission devices in existing technologies, this invention's embodiments consider both power source construction costs and the configuration costs of flexible AC transmission devices, offering a more comprehensive approach.

[0064] The formula for calculating the life cycle cost (LCC) can be:

[0065]

[0066]

[0067] Minimizing cost has always been a primary objective in configuring flexible AC transmission systems (Flexible AC transmission devices) in power systems. Existing technologies only consider configuration costs in the configuration process, neglecting the entire lifecycle. This invention addresses this by constructing a lifecycle-based configuration objective for Flexible AC transmission devices, simultaneously considering the economics of power source maintenance and Flexible AC transmission device maintenance, thus exhibiting comprehensive temporal and typological considerations. Furthermore, this invention determines the operational efficiency of the power system based on changes in grid losses during power system operation. The objective function also considers the changes in power system network losses.

[0068] in, and ΔP k The calculation formula can be:

[0069]

[0070] The formula for calculating the power flow distribution balance (BA) can be:

[0071]

[0072] BA represents the balance of active power flow distribution in a power system, characterizing the fluctuation of actual transmitted power compared to average input power.

[0073] The formula for calculating the node voltage deviation DE is as follows:

[0074]

[0075] Among them, C Fk The one-time basic cost of configuring flexible AC transmission equipment on line k is C. Gi The one-time basic cost of constructing a power source at node i; where C Fk and C Gi This mainly includes land acquisition, construction costs, and one-time installation costs, and is a constant determined based on different construction conditions. Dk P represents the capacity of the flexible AC transmission unit configured on the k-th line. i G The active power capacity of the newly built power source at node i; c F For the construction cost of a unit capacity flexible AC transmission unit, c G The construction cost per unit capacity of power supply; k To configure the state variables of the flexible AC transmission device on the k-th line, l k =1 indicates that a flexible AC transmission device is installed on line k, l k =0 indicates that no flexible AC transmission device is installed on line k; a i To create a new power source state variable at node i, a i =1 indicates that a new power source has been created at node i, a i =0 indicates that no new power source has been created at node i; The cost of operation and maintenance of all flexible AC transmission units in year y. The operating and maintenance costs of all newly built power sources in year y. The power system operation benefits brought in year y; c M The economic cost per unit network loss in the power system; y = 1, 2, ..., Y, where Y is the total number of years in the entire life cycle; To calculate the active power loss of the k-th line before configuring the flexible AC transmission device, ΔP k The active power loss of the k-th line after configuring a flexible AC transmission device; P k The active power P after configuring a flexible AC transmission device for the k-th line k-max U is the maximum power of the k-th line, E() is the mean; k = 1, 2, ..., L, where L is the total number of lines in the power system; i To configure the static voltage value of node i after the flexible AC transmission unit, U i-NN Let i be the rated voltage value of node i; i = 1, 2, ..., N, where N is the total number of nodes in the power system.

[0076] The economic cost and life-cycle cost are used as economic indicators, while the power flow distribution balance and node voltage deviation are used as technical indicators. In this embodiment of the invention, the objective function is determined by comprehensively considering the economic and technical indicators based on the impact of power planning and the configuration of flexible AC transmission equipment on the power system. The objective function is more comprehensive and reasonable.

[0077] In some embodiments, the formulas for calculating the various normalization coefficients can be:

[0078]

[0079]

[0080]

[0081] in, The maximum cost budget for building a new power source. Maximum cost budget for flexible AC transmission equipment. The maximum possible maintenance cost for a newly built power source. The maximum possible maintenance cost for flexible AC transmission systems, c M The economic cost per unit network loss in the power system. L represents the upper limit of total network loss in the power system; L represents the total number of lines in the power system; and N represents the total number of nodes in the power system.

[0082] In some embodiments, S103 may further include:

[0083] S1033: Determine the constraints based on the operating parameters of the power system, the equivalent model of the general flexible AC transmission device, the decision variables of the flexible AC transmission device configuration scheme, and the decision variables of the power planning scheme.

[0084] In some embodiments, the constraints may include: equality constraints of the power system operating state, inequality constraints of the power system operating state, configuration constraints of flexible AC transmission equipment, and power planning constraints.

[0085] In some embodiments, the equality constraints of the power system operating state may include:

[0086]

[0087] Among them, a i To create a new power source state variable at node i, a i =1 indicates that a new power source has been created at node i, a i =0 indicates that no new power source has been created at node i; P i GThe active power capacity of the newly built power source at node i; Q i G The reactive power capacity of the newly built power source at node i; P i G0 Q represents the active power capacity of the existing power source at node i. i G0 P represents the reactive power capacity of the existing power source at node i; i L Let Q be the active load at node i. i L Q represents the reactive load at node i; Fi The reactive power capacity of node i is configured with a flexible AC transmission device; U i Let U be the voltage magnitude at node i. j Let θ be the voltage magnitude at node j. i Let θ be the voltage phase at node i. j The voltage phase at node j; d i Configure the state variables of the flexible AC transmission device for node i, d i =1 indicates that node i is equipped with a flexible AC transmission device, d i =0 indicates that node i is not equipped with a flexible AC transmission device; and The node admittance matrix Y of the power system after configuring flexible AC transmission equipment is shown below. (HP) The element in the i-th row and j-th column The real and imaginary parts, i.e. P k The active power U after configuring a flexible AC transmission device for the k-th line kA U represents the voltage amplitude at the first node A. kB Let θ be the voltage magnitude at the tail node B. kA Let θ be the voltage phase at the first node A. kB X represents the voltage phase at the tail node B; Fk X is the equivalent reactance of the flexible AC transmission device configured on line k. Lk Let φ be the equivalent reactance of line k. k The voltage phase change angle for configuring a flexible AC transmission device on line k; l k To configure the state variables of the flexible AC transmission device on the k-th line, l k =1 indicates that a flexible AC transmission device is installed on line k, l k =0 indicates that no flexible AC transmission device is installed on line k; k = 1, 2, ..., L, where L is the total number of lines in the power system; i = 1, 2, ..., N, where N is the total number of nodes in the power system; j = 1, 2, ..., N, where N is the total number of nodes in the power system.

[0088] Among them, Y (HP) It can be determined according to the general calculation method of the node admittance matrix in the power system in the existing technology. However, in solving Y... (HP) The equivalent reactance X in the flexible AC transmission device needs to be considered. Fk and the ratio of voltage amplitude change m k , i.e. Y (HP) =f(Y,X) Fk ,m k Y is the node admittance matrix of the original power system.

[0089] The equation constraint of the power system operation state in the embodiments of the present invention takes into account the newly built power sources at different nodes. The configuration methods of flexible AC transmission devices in the prior art do not take into account the newly built power sources, and the technical parameters of these newly built power sources are also the output parameters of the power planning scheme.

[0090] Inequality constraints on the operating state of a power system may include:

[0091]

[0092] Among them, P k The active power P after configuring a flexible AC transmission device for the k-th line k-max The maximum power of the k-th line; This represents the power flow of the k-th line after the q-th line fails. Let U be the voltage amplitude at node i after the fault of the q-th line. i-min U is the lower limit of the voltage amplitude at node i. i-max Let ΔP be the upper limit of the voltage amplitude at node i. k To determine the active power loss of the k-th line after configuring a flexible AC transmission device, ε represents the upper limit of total network loss in the power system, and ε is the reactive power output coefficient of the power source.

[0093] All parameters in the inequality constraints for power system operation provided in this embodiment of the invention are calculated from power system data after considering power source planning. Existing flexible AC transmission device configuration methods do not consider this factor. Furthermore, the inequality constraints provided in this embodiment of the invention also consider the coefficient relationship between reactive and active power output, the maximum constraint on system active power losses, etc., making it more comprehensive.

[0094] The configuration constraints for flexible AC transmission units may include:

[0095]

[0096] Where, d i Configure the state variables of the flexible AC transmission device for node i, d i=1 indicates that node i is equipped with a flexible AC transmission device, d i =0 indicates that node i is not equipped with a flexible AC transmission device; kA is the starting node of line k, and kB is the ending node of line k; m k The voltage amplitude variation ratio of the flexible AC transmission device configured on line k; S Dk c represents the capacity of the flexible AC transmission unit configured on the k-th line. F The construction cost per unit capacity of flexible AC transmission equipment; Maximum cost budget for flexible AC transmission equipment. The maximum possible maintenance cost for flexible AC transmission equipment; Let y be the operation and maintenance cost of all flexible AC transmission equipment in year y, where y = 1, 2, ..., Y, and Y is the total number of years in the entire life cycle.

[0097] Power planning constraints may include:

[0098]

[0099] in, c represents the total power supply capacity requirement in the power system. G The construction cost per unit capacity of power supply. The operating and maintenance costs of all newly built power sources in year y. The maximum possible maintenance cost for a newly built power source. This represents the maximum cost budget for the newly built power source. Where, a i +d i ={0,1} indicates that at node i, either a flexible AC transmission device is configured or a new power source is built; the difference between the two is configuration.

[0100] In this embodiment of the invention, the power planning constraints take into account flexible AC transmission devices, and the configuration constraints of flexible AC transmission devices also take into account power planning. By comprehensively considering the mutual influence between the two, the constraints are more comprehensive and accurate.

[0101] When calculating the parameters in the objective function and constraints, the most severe operating condition of the power system is usually selected as the basic condition. For example, the predicted operating condition of the power system at the time of maximum load throughout the year can be selected.

[0102] In some embodiments, S103 may further include:

[0103] S1034: Establish a joint configuration model based on the objective function and constraints.

[0104] In this embodiment of the invention, the influence between the configuration of flexible AC transmission equipment and power planning is comprehensively considered, and an objective function and constraints are established, which together constitute a joint configuration model.

[0105] Furthermore, since the joint allocation model includes eight decision variables (Q... Fi m k φ k X Fk l k d i a i P i G Solving the model may yield multiple planning configuration schemes.

[0106] Therefore, based on the above, in some embodiments, S105 may include:

[0107] S1051: For each planned configuration scheme, determine the transmission margin of the transmission section under that planned configuration scheme;

[0108] S1052: The planning configuration scheme with the largest transmission margin of the transmission section is taken as the target planning configuration scheme.

[0109] In some embodiments, the formula for calculating the transmission margin of a transmission section can be:

[0110]

[0111] Among them, V r Let P be the set of all lines in the r-th transmission section, where R is the number of transmission sections in the power system, and r = 1, 2, ..., R. q Let P be the active power of the q-th line. q-max Let q be the maximum power of the q-th line.

[0112] The transmission margin of a transmission section characterizes the transmission capacity of a power system section and is used to evaluate the transmission capacity of the power grid. It should be calculated after configuring flexible AC transmission equipment and power source planning. In this embodiment of the invention, when using artificial intelligence algorithms (such as ant colony optimization) to solve the joint configuration model, multiple schemes may be obtained. By evaluating each scheme through the transmission margin of the transmission section, the optimal planning configuration scheme that maximizes the power grid's transmission capacity is obtained.

[0113] This invention first establishes a universal equivalent model for flexible AC transmission devices applicable to various types of flexible AC transmission devices, and based on this, determines the technical parameters in the joint configuration scheme of power planning and flexible AC transmission device configuration. Then, it constructs technical and economic indicators that characterize the effects of power planning and flexible AC transmission device configuration, and proposes an objective function for the joint configuration model. Simultaneously, based on the logical relationship between the power planning scheme, the flexible AC transmission device configuration scheme, and various indicators of power system operation after the scheme implementation, it proposes constraints for the joint configuration model. Finally, it solves the joint configuration model composed of the objective function and constraints using an artificial intelligence algorithm, obtaining multiple planning configuration schemes, and evaluating and selecting the target planning configuration scheme. This invention, for the first time, considers the mutual influence between power planning schemes and flexible AC transmission device configuration schemes, proposing a comprehensive joint configuration model that enables the simultaneous acquisition of power planning schemes and flexible AC transmission device configuration schemes, improving the scientific rigor of individual scheme planning. Furthermore, the establishment of a universal equivalent model for flexible AC transmission devices applicable to various types of flexible AC transmission devices allows for the universal configuration of various types of flexible AC transmission devices while considering power planning.

[0114] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0115] Corresponding to the above embodiments, refer to Figure 3 This invention also provides a joint planning and configuration device for flexible AC transmission equipment and power sources, comprising:

[0116] Parameter acquisition module 21 is used to acquire the operating parameters of the power system;

[0117] The decision variable determination module 22 is used to establish an equivalent model of a general flexible AC transmission device and determine the decision variables of the flexible AC transmission device configuration scheme based on the equivalent model; and to determine the decision variables of the power planning scheme.

[0118] The joint configuration model establishment module 23 is used to determine the objective function and constraints based on the operating parameters of the power system, the equivalent model of the general flexible AC transmission device, the decision variables of the flexible AC transmission device configuration scheme and the decision variables of the power planning scheme, and to establish a joint configuration model based on the objective function and constraints.

[0119] The model solving module 24 is used to solve the joint configuration model to obtain multiple planning configuration schemes;

[0120] The scheme output module 25 is used to evaluate multiple planning configuration schemes and take the planning configuration scheme with the best evaluation result as the target planning configuration scheme; among them, the target planning configuration scheme includes: flexible AC transmission device configuration scheme and power supply planning scheme.

[0121] In some embodiments, the decision variable determination module 22 may include:

[0122] Equivalent model establishment unit 221 is used to establish an equivalent model of a general flexible AC transmission device.

[0123] The first decision variable determination unit 222 is used to determine the decision variables of the flexible AC transmission device configuration scheme based on the equivalent model of the general flexible AC transmission device.

[0124] The second decision variable determination unit 223 is used to determine the decision variables of the power planning scheme.

[0125] In some embodiments, the joint configuration model establishment module 23 may include:

[0126] The evaluation parameter determination unit 231 is used to determine multiple evaluation indicators of the power system based on the operating parameters of the power system, the equivalent model of the general flexible AC transmission device, the configuration variables of the flexible AC transmission device, and the power planning variables.

[0127] Objective function determination unit 232 is used to determine the objective function based on multiple evaluation indicators.

[0128] In some embodiments, multiple evaluation metrics include: configuration economic cost, total life cycle cost, power flow distribution balance, and node voltage deviation.

[0129] The objective function may include:

[0130] min{λ1δ1(CO+LCC)+λ2(λ3δ3BA+λ4δ4DE)}

[0131] λ1+λ2=1

[0132] λ3+λ4=1

[0133] Where CO is the configuration economic cost, LCC is the life cycle cost, BA is the power flow distribution balance, DE is the node voltage deviation, λ1, λ2, λ3, and λ4 are weighting coefficients, and δ1, δ3, and δ4 are normalization coefficients.

[0134] In some embodiments, the formula for calculating the configuration economic cost CO can be:

[0135]

[0136] The formula for calculating the life cycle cost (LCC) can be:

[0137]

[0138]

[0139] The formula for calculating the power flow distribution balance (BA) can be:

[0140]

[0141] The formula for calculating the node voltage deviation DE is as follows:

[0142]

[0143] Among them, C Fk The one-time basic cost of configuring flexible AC transmission equipment on line k is C. Gi The one-time basic cost of constructing a power source at node i; S Dk P represents the capacity of the flexible AC transmission unit configured on the k-th line. i G The active power capacity of the newly built power source at node i; c F For the construction cost of a unit capacity flexible AC transmission unit, c G The construction cost per unit capacity of power supply; k To configure the state variables of the flexible AC transmission device on the k-th line, l k =1 indicates that a flexible AC transmission device is installed on line k, l k =0 indicates that no flexible AC transmission device is installed on line k; a i To create a new power source state variable at node i, a i =1 indicates that a new power source has been created at node i, a i =0 indicates that no new power source has been created at node i; The cost of operation and maintenance of all flexible AC transmission units in year y. The operating and maintenance costs of all newly built power sources in year y. The power system operation benefits brought in year y; c M The economic cost per unit network loss in the power system; y = 1, 2, ..., Y, where Y is the total number of years in the entire life cycle; To calculate the active power loss of the k-th line before configuring the flexible AC transmission device, ΔP k The active power loss of the k-th line after configuring a flexible AC transmission device; P k The active power P after configuring a flexible AC transmission device for the k-th line k-maxU is the maximum power of the k-th line, E() is the mean; k = 1, 2, ..., L, where L is the total number of lines in the power system; i To configure the static voltage value of node i after the flexible AC transmission unit, U i-NN Let i be the rated voltage value of node i; i = 1, 2, ..., N, where N is the total number of nodes in the power system.

[0144] In some embodiments, the formulas for calculating the various normalization coefficients can be:

[0145]

[0146]

[0147]

[0148] in, The maximum cost budget for building a new power source. Maximum cost budget for flexible AC transmission equipment. The maximum possible maintenance cost for a newly built power source. The maximum possible maintenance cost for flexible AC transmission systems, c M The economic cost per unit network loss in the power system. L represents the upper limit of total network loss in the power system; L represents the total number of lines in the power system; and N represents the total number of nodes in the power system.

[0149] In some embodiments, the joint configuration model establishment module 23 may further include:

[0150] The constraint determination unit 233 is used to determine the constraints based on the operating parameters of the power system, the equivalent model of the general flexible AC transmission device, the decision variables of the configuration scheme, and the decision variables of the power planning scheme.

[0151] In some embodiments, the constraints may include: equality constraints of the power system operating state, inequality constraints of the power system operating state, configuration constraints of flexible AC transmission equipment, and power planning constraints.

[0152] In some embodiments, the equality constraints of the power system operating state may include:

[0153]

[0154] Among them, a i To create a new power source state variable at node i, a i =1 indicates that a new power source has been created at node i, a i =0 indicates that no new power source has been created at node i; P i GThe active power capacity of the newly built power source at node i; Q i G The reactive power capacity of the newly built power source at node i; P i G0 Q represents the active power capacity of the existing power source at node i. i G0 P represents the reactive power capacity of the existing power source at node i; i L Let Q be the active load at node i. i L Q represents the reactive load at node i; Fi The reactive power capacity of node i is configured with a flexible AC transmission device; U i Let U be the voltage magnitude at node i. j Let θ be the voltage magnitude at node j. i Let θ be the voltage phase at node i. j The voltage phase at node j; d i Configure the state variables of the flexible AC transmission device for node i, d i =1 indicates that node i is equipped with a flexible AC transmission device, d i =0 indicates that node i is not equipped with a flexible AC transmission device; and The node admittance matrix Y of the power system after configuring flexible AC transmission equipment is shown below. (HP) The element in the i-th row and j-th column The real and imaginary parts, i.e. P k The active power U after configuring a flexible AC transmission device for the k-th line kA U represents the voltage amplitude at the first node A. kB Let θ be the voltage magnitude at the tail node B. kA Let θ be the voltage phase at the first node A. kB X represents the voltage phase at the tail node B; Fk X is the equivalent reactance of the flexible AC transmission device configured on line k. Lk Let φ be the equivalent reactance of line k. k The voltage phase change angle for configuring a flexible AC transmission device on line k; l k To configure the state variables of the flexible AC transmission device on the k-th line, l k =1 indicates that a flexible AC transmission device is installed on line k, l k =0 indicates that no flexible AC transmission device is installed on line k; k = 1, 2, ..., L, where L is the total number of lines in the power system; i = 1, 2, ..., N, where N is the total number of nodes in the power system; j = 1, 2, ..., N, where N is the total number of nodes in the power system.

[0155] Inequality constraints on the operating state of a power system may include:

[0156]

[0157] Among them, P k The active power P after configuring a flexible AC transmission device for the k-th line k-max The maximum power of the k-th line; This represents the power flow of the k-th line after the q-th line fails. Let U be the voltage amplitude at node i after the fault of the q-th line. i-min U is the lower limit of the voltage amplitude at node i. i-max Let ΔP be the upper limit of the voltage amplitude at node i. k To determine the active power loss of the k-th line after configuring a flexible AC transmission device, ε is the upper limit of the total network loss in the power system, and ε is the reactive power output coefficient of the power source;

[0158] The configuration constraints for flexible AC transmission units may include:

[0159]

[0160] Where, d i Configure the state variables of the flexible AC transmission device for node i, d i =1 indicates that node i is equipped with a flexible AC transmission device, d i =0 indicates that node i is not equipped with a flexible AC transmission device; kA is the starting node of line k, and kB is the ending node of line k; m k The voltage amplitude variation ratio of the flexible AC transmission device configured on line k; S Dk c represents the capacity of the flexible AC transmission unit configured on the k-th line. F The construction cost per unit capacity of flexible AC transmission equipment; Maximum cost budget for flexible AC transmission equipment. The maximum possible maintenance cost for flexible AC transmission equipment; Let y be the operation and maintenance cost of all flexible AC transmission equipment in year y, where y = 1, 2, ..., Y, and Y is the total number of years in the entire life cycle.

[0161] Power planning constraints may include:

[0162]

[0163] in, c represents the total power supply capacity requirement in the power system. G The construction cost per unit capacity of power supply. The operating and maintenance costs of all newly built power sources in year y. The maximum possible maintenance cost for a newly built power source. The maximum cost budget for building a new power source.

[0164] In some embodiments, the joint configuration model establishment module 23 may further include:

[0165] Model building unit 234 is used to build a joint configuration model based on the objective function and constraints.

[0166] In some embodiments, the solution output module 25 may include:

[0167] Transmission margin evaluation unit 251 is used to determine the transmission margin of the transmission section under each planning configuration scheme according to the planning configuration scheme.

[0168] The optimal solution output unit 252 is used to take the planning configuration scheme with the largest transmission margin of the power transmission section as the target planning configuration scheme.

[0169] In some embodiments, the formula for calculating the transmission margin of a transmission section can be:

[0170]

[0171] Among them, V r Let P be the set of all lines in the r-th transmission section, where R is the number of transmission sections in the power system, and r = 1, 2, ..., R. q Let P be the active power of the q-th line. q-max Let q be the maximum power of the q-th line.

[0172] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the terminal device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above device can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0173] Figure 4This is a schematic block diagram of a terminal device provided in an embodiment of the present invention. Figure 4 As shown, the terminal device 4 in this embodiment includes: one or more processors 40, a memory 41, and a computer program 42 stored in the memory 41 and executable on the processor 40. When the processor 40 executes the computer program 42, it implements the steps in the above embodiments of the joint planning and configuration method for flexible AC transmission devices and power sources, for example... Figure 1 The steps S101 to S105 are shown. Alternatively, when the processor 40 executes the computer program 42, it implements the functions of each module / unit in the above-described embodiment of the joint planning and configuration device for flexible AC transmission equipment and power supply, for example... Figure 3 The functions of modules 21 to 25 are shown.

[0174] Exemplarily, computer program 42 can be divided into one or more modules / units, one or more of which are stored in memory 41 and executed by processor 40 to complete this application. One or more modules / units can be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of computer program 42 in terminal device 4. For example, computer program 42 can be divided into parameter acquisition module 21, decision variable determination module 22, joint configuration model establishment module 23, model solving module 24, and scheme output module 25.

[0175] Parameter acquisition module 21 is used to acquire the operating parameters of the power system;

[0176] The decision variable determination module 22 is used to establish an equivalent model of a general flexible AC transmission device and determine the decision variables of the flexible AC transmission device configuration scheme based on the equivalent model; and to determine the decision variables of the power planning scheme.

[0177] The joint configuration model establishment module 23 is used to determine the objective function and constraints based on the operating parameters of the power system, the equivalent model of the general flexible AC transmission device, the decision variables of the flexible AC transmission device configuration scheme and the decision variables of the power planning scheme, and to establish a joint configuration model based on the objective function and constraints.

[0178] The model solving module 24 is used to solve the joint configuration model to obtain multiple planning configuration schemes;

[0179] The scheme output module 25 is used to evaluate multiple planning configuration schemes and take the planning configuration scheme with the best evaluation result as the target planning configuration scheme; among them, the target planning configuration scheme includes: flexible AC transmission device configuration scheme and power supply planning scheme.

[0180] Other modules or units will not be described in detail here.

[0181] Terminal device 4 includes, but is not limited to, processor 40 and memory 41. Those skilled in the art will understand that... Figure 4 This is merely an example of a terminal device and does not constitute a limitation on terminal device 4. It may include more or fewer components than shown, or combine certain components, or different components. For example, terminal device 4 may also include input devices, output devices, network access devices, buses, etc.

[0182] The processor 40 can 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 general-purpose processor can be a microprocessor or any conventional processor.

[0183] The memory 41 can be an internal storage unit of the terminal device, such as the hard drive or RAM of the terminal device. The memory 41 can also be an external storage device of the terminal device, such as a plug-in hard drive, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card. Furthermore, the memory 41 can include both internal and external storage units of the terminal device. The memory 41 is used to store the computer program 42 and other programs and data required by the terminal device. The memory 41 can also be used to temporarily store data that has been output or will be output.

[0184] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0185] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0186] In the embodiments provided in this application, it should be understood that the disclosed terminal devices and methods can be implemented in other ways. For example, the terminal device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0187] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0188] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0189] If an integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it 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 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 computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0190] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method for the joint planning and configuration of flexible AC transmission equipment and power supply, characterized in that, include: Obtain the operating parameters of the power system; establish an equivalent model of a general flexible AC transmission device, and determine the decision variables of the flexible AC transmission device configuration scheme based on the equivalent model of the general flexible AC transmission device; Determine the decision variables for power planning schemes; Based on the operating parameters of the power system, the equivalent model of the general flexible AC transmission device, the decision variables of the flexible AC transmission device configuration scheme, and the decision variables of the power supply planning scheme, the objective function and constraints are determined, and a joint configuration model is established based on the objective function and constraints; the joint configuration model is solved to obtain multiple planning configuration schemes. The multiple planning configuration schemes are evaluated, and the planning configuration scheme with the best evaluation result is taken as the target planning configuration scheme; wherein, the target planning configuration scheme includes: flexible AC transmission device configuration scheme and power supply planning scheme; The step of determining the objective function and constraints based on the operating parameters of the power system, the equivalent model of the general flexible AC transmission device, the decision variables of the flexible AC transmission device configuration scheme, and the decision variables of the power supply planning scheme includes: Based on the operating parameters of the power system, the equivalent model of the general flexible AC transmission device, the decision variables of the configuration scheme of the flexible AC transmission device, and the decision variables of the power planning scheme, multiple evaluation indicators of the power system are determined. The objective function is determined based on the multiple evaluation indicators; The decision variables for the configuration scheme of the flexible AC transmission unit include: the first State variables and nodes of flexible AC transmission devices configured on the line Configure the state variables and nodes of the flexible AC transmission device The location is equipped with a flexible AC transmission device with reactive power capacity and lines. The voltage amplitude variation ratio of the flexible AC transmission device configured on the line Voltage phase change angle and line of the flexible AC transmission device configured on it Equivalent reactance of flexible AC transmission device configured on it; The decision variables for the power planning scheme include: the location and capacity of the power supply connection. The evaluation indicators include: configuration economic cost, total life cycle cost, power flow distribution balance, and node voltage deviation. The objective function includes: in, The economic cost of the aforementioned configuration, The total life cycle cost is... The power flow distribution uniformity, The node voltage deviation is [value missing]. , , , These are the weighting coefficients. , , This is the normalization coefficient.

2. The method for joint planning and configuration of flexible AC transmission equipment and power supply as described in claim 1, characterized in that, The economic cost of the configuration The calculation formula is: The total life cycle cost The calculation formula is: The balance of power flow distribution The calculation formula is: The node voltage deviation The calculation formula is: in, For the first The initial basic cost of configuring flexible AC transmission equipment on this line. For nodes The one-time basic cost of constructing the power source; For the first The capacity of the flexible AC transmission equipment configured on this line, For nodes The active power capacity of the newly built power source; The construction cost per unit capacity of flexible AC transmission equipment, The construction cost per unit capacity of power supply; In the first The state variables of flexible AC transmission devices configured on the line. Indicates the line It is equipped with a flexible AC power transmission device. Indicates the line The upper part was not equipped with a flexible AC transmission device; For the node The state variables of the newly created power source. Represents a node A new power supply has been built there. Represents a node No new power supply has been built at this location; For the first Annual operating and maintenance costs of all flexible AC transmission units, No. The annual operating and maintenance costs of all newly built power sources. For the first The power system operation benefits brought about by the year; The economic cost per unit network loss in a power system; , The total number of years throughout the entire lifespan; Before configuring flexible AC transmission equipment, the first The active power loss of the line, After configuring flexible AC transmission equipment, the first The active power loss of the line; For the first The active power of the line after being equipped with flexible AC transmission equipment. For the first The maximum power of the line, The mean; , This represents the total number of lines in the power system. For configuring flexible AC transmission equipment downstream nodes The static voltage value, For nodes The rated voltage value; , This represents the total number of nodes in the power system.

3. The method for joint planning and configuration of flexible AC transmission equipment and power supply as described in claim 1, characterized in that, The formulas for calculating each normalization coefficient are as follows: in, The maximum cost budget for building a new power source. Maximum cost budget for flexible AC transmission equipment. The maximum possible maintenance cost for a newly built power source. The maximum possible maintenance cost for flexible AC transmission systems. The economic cost per unit network loss in the power system. This represents the upper limit of total network losses in the power system. This represents the total number of lines in the power system. This represents the total number of nodes in the power system.

4. The method for joint planning and configuration of flexible AC transmission equipment and power supply as described in claim 1, characterized in that, The constraints include: equality constraints of power system operating status, inequality constraints of power system operating status, configuration constraints of flexible AC transmission equipment, and power planning constraints.

5. The method for joint planning and configuration of flexible AC transmission equipment and power supply as described in claim 4, characterized in that, The equality constraints of the power system operating state include: in, For the node The state variables of the newly created power source. Represents a node A new power supply has been built there. Represents a node No new power supply has been built at this location; For nodes The active power capacity of the newly built power source; node The reactive power capacity of the newly built power source; For nodes The active capacity of the existing power source, For nodes The reactive power capacity of the existing power source; For nodes Active load at the location, For nodes reactive load at the location; For nodes Reactive power capacity equipped with flexible AC transmission devices; For nodes Voltage amplitude at that point For nodes Voltage amplitude at that point For nodes Voltage phase at that point For nodes Voltage phase at the location; For nodes Configure the state variables of the flexible AC transmission device. Represents a node Equipped with flexible AC transmission equipment, Represents a node No flexible AC transmission equipment was installed; and These are the nodal admittance matrices of the power system after configuring flexible AC transmission devices. The Middle Line 1 Elements in the column The real and imaginary parts, i.e. ; For the first The active power of the line after being equipped with flexible AC transmission equipment. The voltage amplitude at the first node A. The voltage amplitude at the tail node B. Let A be the voltage phase at the first node A. The voltage phase at the tail node B; For the line The equivalent reactance of the flexible AC transmission device is configured on it. For the line The equivalent reactance, For the line The voltage phase change angle of the flexible AC transmission device configured on top; In the first The state variables of flexible AC transmission devices configured on the line. Indicates the line It is equipped with a flexible AC power transmission device. Indicates the line The upper part was not equipped with a flexible AC transmission device; , This represents the total number of lines in the power system. , This represents the total number of nodes in the power system. , This represents the total number of nodes in the power system. The inequality constraints on the operating state of the power system include: in, For the first The active power of the line after being equipped with flexible AC transmission equipment. For the first The maximum power of the line; For the first After the line fault, the first The trend of this route For the first After a line fault, the node Voltage amplitude at that point For nodes The lower limit of voltage amplitude at that location, For nodes The upper limit of voltage amplitude at that location, After configuring flexible AC transmission equipment, the first The active power loss of the line, This represents the upper limit of total network losses in the power system. This is the reactive power output coefficient of the power source; The configuration constraints for the flexible AC transmission device include: in, For nodes Configure the state variables of the flexible AC transmission device. Represents a node Equipped with flexible AC transmission equipment, Represents a node No flexible AC transmission equipment was installed; For the line The first node, For the line The terminal node; For the line The voltage amplitude variation ratio of the flexible AC transmission device configured on it; For the first The capacity of the flexible AC transmission equipment configured on this line, The construction cost per unit capacity of flexible AC transmission equipment; Maximum cost budget for flexible AC transmission equipment. The maximum possible maintenance cost for flexible AC transmission equipment; For the first Annual operating and maintenance costs of all flexible AC transmission units, , The total number of years throughout the entire lifespan; The power planning constraints include: in, The total power supply capacity requirement in the power system. The construction cost per unit capacity of power supply. No. The annual operating and maintenance costs of all newly built power sources. The maximum possible maintenance cost for a newly built power source. The maximum cost budget for building a new power source.

6. The method for joint planning and configuration of flexible AC transmission equipment and power supply as described in claim 1, characterized in that, The step of evaluating the multiple planning configuration schemes and selecting the optimal planning configuration scheme as the target planning configuration scheme includes: For each planned configuration scheme, the transmission margin of the transmission section under that planned configuration scheme is determined. The planning configuration scheme that maximizes the transmission margin of the power transmission section is taken as the target planning configuration scheme.

7. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the joint planning and configuration method of the flexible AC transmission device and power source as described in any one of claims 1 to 6.

8. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the joint planning and configuration method of the flexible AC transmission device and power source as described in any one of claims 1 to 6.

Images