Method, device, equipment and medium for determining inter-regional transmission price with the goal of allowing revenue recovery

Abstract

The present application relates to a method, device, equipment and medium for determining inter-regional transmission electricity prices with the goal of recovering permitted income. The method comprises: determining the transmission electricity prices of each segment of the target line with the goal of maximizing the transmission network fee and minimizing the total cost of power generation according to the upper and lower limits of the transmission electricity prices of each segment of the target line in the transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, and determining the transmission electricity price of the transmission line according to the transmission electricity prices of each segment of the first target line and the transmission electricity prices of each segment of the second target line, thereby introducing permitted income, with the goal of recovering permitted income, that is, with the goal of maximizing the transmission network fee, taking into account the influence of permitted income and the power market on inter-regional transmission electricity prices, and being able to better adapt to the trend of increasing marketization of electricity today.

Description

Technical Field

[0001] The present application relates to the technical field of electricity price optimization, and in particular to a method, device, equipment and medium for determining inter-regional transmission electricity prices with the goal of allowing revenue recovery. Background Art

[0002] With the continuous development of the economy and the continuous adjustment of the energy structure, the demand for electricity has shown a rapid growth trend. In order to meet the electricity demand of various regions, optimize resource allocation, and alleviate the contradiction between energy supply and demand, inter-regional power transmission has become an important choice for power transmission.

[0003] In the current inter-regional power transmission process, the transmission cost is usually calculated manually, and the inter-regional transmission electricity price is determined based on the transmission cost and market electricity price. However, this method has the problems of complex operation and low reliability. Summary of the invention

[0004] Based on this, it is necessary to provide a method, device, equipment and medium for determining inter-regional transmission prices with the goal of allowing revenue recovery, which can simplify operations and improve the calculation reliability of transmission prices in response to the above technical problems.

[0005] In a first aspect, the present application provides a method for determining inter-regional transmission electricity prices. The method comprises:

[0006] According to the upper and lower limits of the transmission electricity price of each section of the target line in the transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, with the goal of maximizing the transmission network fee and minimizing the total power generation cost, the transmission electricity price of each section of the target line is determined; wherein the target line includes a first target transmission line and a second target transmission line; when the first target transmission line is an AC transmission line, the second target transmission line is a DC transmission line;

[0007] The transmission price of the transmission line is determined according to the transmission price of each section of the first target line and the transmission price of each section of the second target line.

[0008] In one embodiment, the transmission price of each section of the target line is determined based on the upper and lower limits of the transmission price of each section of the target line in the transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, with the goal of maximizing the transmission network fee and minimizing the total cost of power generation, including:

[0009] Determining a first constraint condition of the objective function according to the upper and lower limits of the transmission electricity price of each section of the target line in the transmission line; the first constraint condition is used to constrain the transmission electricity price of each section in the target line;

[0010] Determining a second constraint condition of the objective function according to the unit capacity and transmission capacity of the target line in the transmission line and the node load of each node in the transmission line; the second constraint condition is used to constrain the transmission power of the target line;

[0011] According to the objective function, the first constraint condition and the second constraint condition, with the goal of maximizing the transmission network fee and minimizing the total power generation cost, determining the transmission electricity price of each section in the target line;

[0012] The objective function is used to characterize the correlation between the transmission price, transmission power and transmission network fee of each section in the target line.

[0013] In one embodiment, the transmission price of each section of the target line is determined based on the upper and lower limits of the transmission price of each section of the target line in the transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, with the goal of maximizing the transmission network fee and minimizing the total cost of power generation, and further includes:

[0014] Determining a third constraint condition of the objective function according to the permitted income of each section of the target line in the transmission line; the third constraint condition is used to constrain the transmission price and transmission power of the target line;

[0015] According to the objective function, the first constraint condition, the second constraint condition and the third constraint condition, the transmission electricity price of each section of the target line is determined with the goal of maximizing the transmission network fee and minimizing the total power generation cost.

[0016] In one embodiment, the method further comprises:

[0017] Determine an initial function of the target line; the initial function is used to characterize the correlation between the transmission price, transmission power and transmission network fee of the target line;

[0018] The target function is determined according to the corresponding relationship and the initial function; the corresponding relationship includes the corresponding relationship between the transmission price and the transmission power of the target line and the transmission price and the transmission power of each section in the target line.

[0019] In one embodiment, the first constraint condition includes: the transmission electricity price of each segment in the target line does not exceed the upper and lower limits of the transmission electricity price, and the difference between the transmission electricity price and the lower limit of the transmission electricity price is not greater than a first preset threshold;

[0020] The second constraint condition includes: the transmission power of the target line is not greater than the unit capacity, the transmission capacity and the node load.

[0021] In one of the embodiments, the third constraint condition includes: the difference between the transmission network fee of each section in the target line and the permitted income is not greater than a second preset threshold.

[0022] In a second aspect, the present application also provides a device for determining inter-regional power transmission prices. The device comprises:

[0023] A first determination module is used to determine the transmission price of each section of the target line according to the upper and lower limits of the transmission price of each section of the target line in the transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, with the goal of maximizing the transmission network fee and minimizing the total power generation cost; wherein the target line includes a first target transmission line and a second target transmission line; when the first target transmission line is an AC transmission line, the second target transmission line is a DC transmission line;

[0024] The second determining module is used to determine the transmission price of the transmission line according to the transmission price of each section of the first target line and the transmission price of each section of the second target line.

[0025] In a third aspect, the present application further provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of any of the above methods when executing the computer program.

[0026] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of any of the above methods when executed by a processor.

[0027] In a fifth aspect, the present application also provides a computer program product, including a computer program, which implements the steps of any of the above methods when executed by a processor.

[0028] The above-mentioned method, device, equipment and medium for determining the inter-regional transmission price with the goal of recovering the permitted income, by determining the transmission price of each segment of the target line in the transmission line according to the upper and lower limits of the transmission price, permitted income, unit capacity, transmission capacity, and node load of each node in the transmission line, with the goal of maximizing the transmission network fee and minimizing the total cost of power generation, and determining the transmission price of the transmission line according to the transmission price of each segment of the first target line and the transmission price of each segment of the second target line, thereby avoiding manual determination of the inter-regional transmission price, simplifying the operation of calculating the inter-regional transmission price, and improving the reliability of the calculated inter-regional transmission price. In addition, the permitted income is introduced in the embodiment of the present application, with the goal of recovering the permitted income, that is, with the goal of maximizing the transmission network fee, taking into account the influence of the permitted income and the power market on the inter-regional transmission price, and can better adapt to the trend of increasing marketization of electricity today. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is an internal structure diagram of a computer device provided in an embodiment of the present application;

[0030] Figure 2 It is a flow chart of a method for determining inter-regional power transmission prices provided in an embodiment of the present application;

[0031] Figure 3 is a schematic diagram of a regional electricity market model provided in an embodiment of the present application;

[0032] Figure 4 It is a flowchart of a method for determining a transmission electricity price provided in an embodiment of the present application;

[0033] Figure 5 It is a flowchart of another method for determining a transmission electricity price provided in an embodiment of the present application;

[0034] Figure 6 It is a flow chart of a method for determining an objective function provided in an embodiment of the present application;

[0035] Figure 7 is a schematic diagram of a two-layer optimization model provided in an embodiment of the present application;

[0036] Figure 8 It is a flow chart of a method for determining inter-regional transmission electricity price with the goal of allowing revenue recovery provided in an embodiment of the present application;

[0037] Fig. 9 is a schematic diagram of a power transmission area provided in an embodiment of the present application;

[0038] Fig.10 It is a structural block diagram of a device for determining inter-regional power transmission prices provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0040] With the continuous development of the economy and the continuous adjustment of the energy structure, the demand for electricity has shown a rapid growth trend. In order to meet the electricity demand of various regions, optimize resource allocation, and alleviate the contradiction between energy supply and demand, inter-regional power transmission has become an important choice for power transmission.

[0041] In the current inter-regional power transmission process, the transmission cost is usually calculated manually, and the inter-regional transmission electricity price is determined based on the transmission cost and market electricity price. However, this method has the problems of complex operation and low reliability.

[0042] The method for determining the inter-regional transmission price provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown. Figure 1 is an internal structure diagram of a computer device provided in an embodiment of the present application. The computer device may be a server, and its internal structure diagram may be as follows Figure 1 As shown. The computer device includes a processor, a memory and a network interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for determining an inter-regional power transmission price is implemented.

[0043] Those skilled in the art will understand that Figure 1 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0044] In one embodiment, Figure 2 As shown, Figure 2 This is a flow chart of a method for determining inter-regional power transmission prices provided in an embodiment of the present application. This method can be applied to Figure 1 Computer equipment.

[0045] For example, refer to Figure 3 , Figure 3 Schematic diagram of a regional electricity market model provided by an embodiment of the present application. Figure 3 As shown, power is exchanged between regions through inter-regional transmission lines. Since each regional power market is cleared separately, the inter-regional transmission lines are equivalent to generator sets or loads in the regional market according to the direction of transmission power. In the embodiment of the present application, the regional power market B is mainly considered, then the generator sets participating in inter-regional power transmission in the regional power market A can be equivalent to an equivalent unit, and the inter-regional transmission lines that consume the electricity of the regional power market B are equivalent loads.

[0046] The above-mentioned method for determining the inter-regional transmission price includes the following steps:

[0047] S201, based on the upper and lower limits of the transmission electricity price of each section of the target line in the transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, with the goal of maximizing the transmission grid fee and minimizing the total cost of power generation, determine the transmission electricity price of each section of the target line.

[0048] The target line includes a first target transmission line and a second target transmission line; when the first target transmission line is an AC transmission line, the second target transmission line is a DC transmission line.

[0049] Optionally, when the first target transmission line is an AC transmission line and the second target transmission line is a DC transmission line, the transmission price of each section of the AC transmission line can be determined based on the upper and lower limits of the transmission price of each section of the AC transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, with the goal of maximizing the transmission network fee and minimizing the total cost of power generation. And the transmission price of each section of the DC transmission line can be determined based on the upper and lower limits of the transmission price of each section of the DC transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, with the goal of maximizing the transmission network fee and minimizing the total cost of power generation.

[0050] In one embodiment, the transmission price of each section of the target line is determined with the goal of maximizing the transmission network fee, that is, recovering the permitted income.

[0051] In the embodiment of the present application, the permitted income may include permitted costs, permitted income and taxes, wherein the permitted costs include depreciation expenses and operation and maintenance expenses.

[0052] Depreciation expense refers to the amount calculated by multiplying the original value of the effective fixed assets of the power transmission and distribution company by a certain fixed depreciation rate in order to compensate for the depreciation of the fixed assets of the power transmission and distribution company as they are used and over time, after deducting the residual value. The original value of the effective fixed assets includes three parts: the final settlement of the line completion, the cost of supporting substation facilities and the cost of building construction. For example, when the depreciation periods corresponding to the line depreciation, supporting substation depreciation and supporting building depreciation are 17 years, 12 years and 20 years respectively, and the residual value rate is 5%, the line depreciation, supporting substation depreciation and supporting building depreciation can be determined by the following formulas (1)-(3) respectively:

[0053] (1)

[0054] (2)

[0055] (3)

[0056] Operation and maintenance costs refer to the necessary expenses incurred by the power transmission enterprise to ensure the safe and smooth operation of the power transmission network, including material costs, repair costs, employee salaries and other costs incurred for providing power transmission and distribution services. For example, when the material rate is no more than 1%, the repair rate is no more than 1.5%, and the other cost rate is no more than 2.5%, the operation and maintenance costs can be determined by the following formula (4):

[0057] (4)

[0058] The allowable return is calculated by multiplying the transmission company's available assets with a calculable return by the weighted average cost of capital (WACC) for the transmission industry.

[0059] Among them, effective assets mainly include net value of fixed assets, net value of intangible assets and working capital required for operation. Net value of intangible assets and working capital required for operation are 5% of net value of fixed assets. Net value of fixed assets can be determined by the following formula (5):

[0060] (5)

[0061] The weighted average cost of capital (WACC) can be determined using the following formula (6):

[0062] (6)

[0063] Taxes include corporate income tax, urban construction and education surcharges.

[0064] S202: Determine the transmission price of the transmission line according to the transmission price of each section of the first target line and the transmission price of each section of the second target line.

[0065] Optionally, when the first target transmission line is an AC transmission line and the second target transmission line is a DC transmission line, the transmission price of the transmission line can be determined according to the transmission price of each section of the AC transmission line and the transmission price of each section of the DC transmission line.

[0066] In a possible implementation, the sum of the transmission electricity prices of each section of each AC transmission line and the transmission electricity prices of each section of each DC transmission line in the transmission line may be used as the transmission electricity price of the transmission line.

[0067] In the embodiment of the present application, the transmission price of each segment of the target line in the transmission line is determined according to the upper and lower limits of the transmission price, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, with the goal of maximizing the transmission network fee and minimizing the total cost of power generation. The transmission price of the transmission line is determined according to the transmission price of each segment of the first target line and the transmission price of each segment of the second target line, thereby avoiding the manual determination of the cross-regional transmission price, simplifying the operation of calculating the cross-regional transmission price, and improving the reliability of the calculated cross-regional transmission price. In addition, the permitted income is introduced in the embodiment of the present application, with the goal of recovering the permitted income, that is, with the goal of maximizing the transmission network fee, taking into account the influence of the permitted income and the power market on the cross-regional transmission price, and can better adapt to the trend of increasing marketization of electricity today.

[0068] Reference Figure 4 , Figure 4 It is a flow chart of a method for determining a transmission price provided in an embodiment of the present application. This implementation involves how to determine the transmission price of each segment of the target line based on the upper and lower limits of the transmission price of each segment of the target line in the transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, with the goal of maximizing the transmission network fee and minimizing the total cost of power generation. A possible implementation method. Based on the above embodiment, the above S201 includes the following steps:

[0069] S401, determining a first constraint condition of an objective function according to upper and lower limits of transmission electricity prices of each segment of a target line in a transmission line.

[0070] Among them, the first constraint condition is used to constrain the transmission electricity price of each section in the target line, and the objective function is used to characterize the correlation between the transmission electricity price of each section in the target line, the transmission power and the transmission network fee.

[0071] In the embodiment of the present application, the objective function can be used to characterize the correlation between the transmission price, transmission power and transmission network fee of each segment in the target line. For example, the objective function can be expressed as the following formula (8):

[0072] (8)

[0073] In formula (8), The transmission fee for the transmission line. For segmentation The transmission price of electricity is the auxiliary variable of the equivalent unit output of the DC transmission line, that is, the transmission power of the DC transmission line. It is an auxiliary variable of the equivalent unit output of the AC transmission line, that is, the transmission power of the AC transmission line.

[0074] In one embodiment, the first constraint condition is used to constrain the transmission electricity price of each section of the target line, and the first constraint condition includes that the transmission electricity price of each section of the target line is not greater than the upper limit of the transmission electricity price and not less than the lower limit of the transmission electricity price.

[0075] Optionally, the first constraint condition also includes that the portion of the transmission electricity price of each section of the target line that is greater than the lower limit of the transmission electricity price does not exceed a first preset threshold, that is, a first difference obtained by subtracting the lower limit of the transmission electricity price from the transmission electricity price of each section of the target line is not greater than the first preset threshold.

[0076] S402, determining a second constraint condition of the objective function according to the unit capacity and transmission capacity of the target line in the transmission line, and the node load of each node in the transmission line.

[0077] The second constraint condition is used to constrain the transmission power of the target line.

[0078] The transmission capacity may include the transmission capacity and line capacity of the target line.

[0079] In an embodiment of the present application, the second constraint condition may include: the transmission power of the target line is not less than 0, not greater than the unit capacity and not greater than the line capacity of the target line, and the total transmission power of the transmission line does not exceed the transmission capacity of the target line.

[0080] S403, according to the objective function, the first constraint condition and the second constraint condition, with the goal of maximizing the transmission network fee and minimizing the total power generation cost, determining the transmission price of each section in the target line.

[0081] In an embodiment of the present application, an optimization model can be constructed based on the objective function, the first constraint condition and the second constraint condition, and the transmission electricity price of each section in the target line is used as a decision variable. The transmission electricity price of each section in the target line directly affects the transmission grid fee and the total cost of power generation. The transmission electricity price and transmission power in the objective function are constrained by the first constraint condition and the second constraint condition. When the transmission electricity price satisfies the first constraint condition and the transmission power satisfies the second constraint condition, the optimal solution of the transmission electricity price of each section in the target line is determined with the goal of maximizing the transmission grid fee and minimizing the total cost of power generation.

[0082] In the embodiment of the present application, the first constraint of the objective function is determined according to the upper and lower limits of the transmission price of each segment of the target line in the transmission line, and the second constraint of the objective function is determined according to the unit capacity, transmission capacity, and node load of each node in the transmission line of the target line in the transmission line. According to the objective function, the first constraint and the second constraint, the transmission price of each segment in the target line is determined with the goal of maximizing the transmission network fee and minimizing the total cost of power generation, so that the transmission network fee of the transmission line can be maximized and the total cost of power generation can be minimized by optimizing the transmission price of each segment in the target line, which helps to improve the economic benefits of power transmission. In addition, the objective function and the constraint conditions can be used to reasonably allocate power resources and optimize the configuration of power resources.

[0083] Reference Figure 5 , Figure 5 It is a flowchart of another method for determining the transmission electricity price provided by an embodiment of the present application. This implementation involves how to determine the transmission electricity price of each segment of the target line according to the upper and lower limits of the transmission electricity price of each segment of the target line in the transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, with the goal of maximizing the transmission network fee and minimizing the total cost of power generation. A possible implementation method. On the basis of the above embodiment, the above S201 also includes the following steps:

[0084] S501, determining a third constraint condition of the objective function according to the permitted income of each segment of the target line in the transmission line.

[0085] The third constraint condition is used to constrain the transmission price and transmission power of the target line.

[0086] In the embodiment of the present application, the transmission fee of the target line can be the product of the transmission price and the transmission power. The third constraint condition can be used to constrain the transmission fee of the target line, that is, constrain the product of the transmission price and the transmission power of the target line.

[0087] In one possible implementation, the third constraint of the objective function includes that the transmission network fee of each segment in the objective function is less than the permitted income, or that the second difference obtained by subtracting the permitted income from the transmission network fee of each segment in the objective function is not greater than a second preset threshold.

[0088] S502, according to the objective function, the first constraint condition, the second constraint condition and the third constraint condition, with the goal of maximizing the transmission network fee and minimizing the total power generation cost, determining the transmission electricity price of each section of the target line.

[0089] In an embodiment of the present application, the transmission price of each section in the target line can be used as a decision variable. The transmission price of each section in the target line directly affects the transmission network fee and the total cost of power generation. The transmission price and transmission power in the objective function are constrained by the first constraint, the second constraint and the third constraint. When the transmission price satisfies the first constraint, the transmission power satisfies the second constraint, and the product of the transmission price and the transmission power satisfies the third constraint, the optimal solution of the transmission price of each section in the target line is determined with the goal of maximizing the transmission network fee and minimizing the total cost of power generation.

[0090] In an embodiment of the present application, the third constraint of the objective function is determined based on the permitted income of each section of the target line in the transmission line. Based on the objective function, the first constraint, the second constraint and the third constraint, the transmission price of each section of the target line is determined with the goal of maximizing the transmission network fee and minimizing the total power generation cost. Thus, on the basis of the above-mentioned embodiment, the permitted income is introduced with the goal of recovering the permitted income, that is, with the goal of maximizing the transmission network fee. The permitted income and the influence of the power market on the cross-regional transmission price are taken into consideration, which can better adapt to the current trend of increasing marketization of electricity.

[0091] Reference Figure 6 , Figure 6 : is a flow chart of a method for determining an objective function provided by an embodiment of the present application. Based on the above embodiment, the method further includes the following steps:

[0092] S601, determining an initial function of a target line.

[0093] The initial function is used to characterize the relationship between the transmission price, transmission power and transmission network fee of the target line.

[0094] For example, refer to Figure 7 , Figure 7 It is a schematic diagram of a two-layer optimization model provided in an embodiment of the present application. The upper layer is the transmission price optimization model of the transmission operator, and the optimization result of the transmission price is obtained based on the lower-layer power market clearing result. In other words, the upper-layer model makes decisions on the optimization results of inter-regional transmission electricity quantity, and transmits the optimization results of inter-regional transmission electricity price to the lower layer; the lower layer is the power market clearing that considers the quotation of equivalent units, which is used to make decisions on the optimization results of equivalent unit clearing electricity quantity, that is, the optimization results of inter-regional transmission electricity quantity, and transmits the optimization results of inter-regional transmission electricity quantity to the upper layer.

[0095] In the embodiment of the present application, the upper model can be expressed as the following formulas (9)-(17):

[0096] (9)

[0097] (10)

[0098] (11)

[0099] (12)

[0100] (13)

[0101] (14)

[0102] (15)

[0103] (16)

[0104] (17)

[0105] In formulas (9)-(17), the decision variables are , is the transmission price of the DC transmission line in the transmission line, The transmission fee for the transmission line. is the transmission price of the AC transmission line in the transmission line, , are the equivalent sets of units corresponding to the DC transmission line and the AC transmission line respectively, , are the equivalent unit output (transmission power) of DC transmission lines and AC transmission lines respectively, , are the upper and lower limits of the transmission price of the DC transmission line, , are the upper and lower limits of the transmission price of AC transmission lines, , are the permitted revenues corresponding to DC transmission lines and AC transmission lines, respectively. , is the slack variable, , is an auxiliary binary variable, is a sufficiently large constant.

[0106] The above formula (9) is the initial function, and formulas (10)-(17) are the constraints of the initial function.

[0107] In the embodiment of the present application, the lower layer model can be expressed as the following formulas (18)-(23):

[0108] (18)

[0109] (19)

[0110] (20)

[0111] (twenty one)

[0112] (twenty two)

[0113] (twenty three)

[0114] Formulas (19)-(23) are the constraints of the lower-level model. In formulas (18)-(23), the lower-level decision variables are , Output for units in the market (in Figure 3 For example, the output of units in regional power market B), is the total power generation cost of equivalent units and generators in the market, , , , , , , , , are the dual variables corresponding to each constraint condition, is the set of nodes in the transmission line, is the set of lines in the transmission line, Provide quotation for units in the market, For the equivalent quotation of DC transmission circuit, AC transmission circuit equivalent quotation, For the The node load of each node, For transmission lines The transmission capacity of is the transfer factor, is the unit capacity in the market, is the transmission capacity of the DC transmission circuit, is the transmission capacity of the AC transmission circuit.

[0115] In a possible implementation, the lower model can be linearly transformed based on the dual variables of the constraint conditions to transform them into the constraint conditions of the upper model. , , , , , , , , By linearly transforming the above formulas (19)-(23), we can obtain the following formulas (24)-(27), which can be used as constraints for the above formula (9):

[0116] (twenty four)

[0117] (25)

[0118] (26)

[0119] (27)

[0120] S602: Determine the target function according to the corresponding relationship and the initial function.

[0121] The corresponding relationship includes the corresponding relationship between the transmission electricity price and transmission power of the target line and the transmission electricity price and transmission power of each section in the target line.

[0122] In the embodiment of the present application, the above formulas (9)-(27) can be calculated based on the corresponding relationship. and The variables are discretized and parameterized, and then the objective function is determined based on the discretized variables and the initial function.

[0123] For example, the corresponding relationship between the transmission price and transmission power of the target line and the transmission price and transmission power of each section in the target line can be expressed as the following formulas (28)-(29):

[0124] (28)

[0125] (29)

[0126] The constraints of formulas (28)-(29) can be expressed as the following formulas (30)-(37):

[0127] (30)

[0128] (31)

[0129] (32)

[0130] (33)

[0131] (34)

[0132] (35)

[0133] (36)

[0134] (37)

[0135] In formulas (28)-(37), For transmission lines The segment in For transmission line segmentation The transmission price of electricity , are the equivalent unit output auxiliary variables of DC transmission lines and AC transmission lines respectively, , are auxiliary binary variables for electricity prices of DC transmission lines and AC transmission lines, respectively.

[0136] Optionally, formula (28)-(37) can be substituted into the above formula (9)-(27) to obtain the objective function and the constraints of the objective function. The objective function and the constraints of the objective function can be expressed as the following formula (38)-(42):

[0137] (38)

[0138] (39)

[0139] (40)

[0140] (41)

[0141] (42)

[0142] Among them, formula (38) is the objective function, and formulas (10)-(11), (14)-(17), (19)-(26), (30)-(37), and (39)-(42) are the constraints of the objective function.

[0143] In an embodiment of the present application, an initial function of the target line is determined, and a target function is determined based on the corresponding relationship and the initial function. The nonlinear part in the initial function can be converted into a linear variable to facilitate the solution, thereby improving the accuracy of the transmission electricity price obtained by solving the target function.

[0144] On the basis of the above embodiment, the first constraint condition includes: the transmission electricity price of each section in the target line does not exceed the upper and lower limits of the transmission electricity price, and the difference between the transmission electricity price and the lower limit of the transmission electricity price is not greater than the first preset threshold;

[0145] The second constraint condition includes: the transmission power of the target line is not greater than the unit capacity, transmission capacity and node load.

[0146] In the embodiment of the present application, the first constraint condition includes the above formulas (10)-(11) and (14)-(15). The second constraint condition includes the above formulas (19)-(26), (30)-(37) and (39).

[0147] On the basis of the above embodiment, the third constraint condition includes: the difference between the transmission network fee and the permitted income of each section in the target line is not greater than the second preset threshold.

[0148] In the embodiment of the present application, the third constraint condition includes the above formulas (16)-(17) and (39)-(40).

[0149] Reference Figure 8 , Figure 8 This is a flow chart of a method for determining inter-regional transmission electricity prices with the goal of allowing revenue recovery provided by an embodiment of the present application. The method comprises the following steps:

[0150] S801, determining an initial function of a target line.

[0151] S802: Determine the target function according to the corresponding relationship and the initial function.

[0152] S803, determining a first constraint condition of the objective function according to the upper and lower limits of the transmission electricity price of each section of the target line in the transmission line.

[0153] S804, determining a second constraint condition of the objective function according to the unit capacity and transmission capacity of the target line in the transmission line, and the node load of each node in the transmission line.

[0154] S805, determining a third constraint condition of the objective function according to the permitted income of each segment of the target line in the transmission line.

[0155] S806, according to the objective function, the first constraint condition, the second constraint condition and the third constraint condition, with the goal of maximizing the transmission network fee and minimizing the total power generation cost, determine the transmission electricity price of each section of the target line.

[0156] S807: Determine the transmission price of the transmission line according to the transmission price of each section of the first target line and the transmission price of each section of the second target line.

[0157] In order to introduce the embodiments of the present application more clearly, Fig. 9 An exemplary description is given. Fig. 9 This is a schematic diagram of a power transmission area provided in an embodiment of the present application.

[0158] In one possible implementation, Fig. 9 Taking the transmission area shown in the figure as an example, if the upper and lower limits of the transmission price of the inter-regional transmission line are set to [0.04, 0.12] yuan / kWh, the discrete step length is set to 0.002 yuan / kWh. The basic parameters of each AC and DC inter-regional transmission line are shown in Table 1. A single period data is selected for optimization, and the period length is 1h.

[0159]

[0160] Table 1

[0161] Through the above objective function and corresponding constraints, the transmission price of each transmission line is determined. The optimization results of each transmission line based on the optimization model are shown in Table 2:

[0162]

[0163] Table 2

[0164] Combining Table 1 and Table 2, it can be seen that for transmission lines whose optimized transmission price is greater than the lower limit of 0.04 yuan / kWh, the transmission grid fee is only slightly lower than the permitted income, achieving the maximum recovery of the permitted income. For the remaining lines, the transmission grid fee is higher than the permitted income, which is mainly due to the low permitted income of these lines. When the transmission price has reached the minimum value, it cannot be further reduced to reduce the permitted income of the line.

[0165] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0166] Based on the same inventive concept, the embodiment of the present application also provides an inter-regional power transmission price determination device for implementing the inter-regional power transmission price determination method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more inter-regional power transmission price determination device embodiments provided below can refer to the limitations of the inter-regional power transmission price determination method above, and will not be repeated here.

[0167] In one embodiment, Fig.10 As shown, Fig.10 1 is a structural block diagram of a device for determining an inter-regional power transmission price provided in an embodiment of the present application. The device 1000 includes:

[0168] The first determination module 1001 is used to determine the transmission price of each section of the target line according to the upper and lower limits of the transmission price of each section of the target line in the transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, with the goal of maximizing the transmission network fee and minimizing the total power generation cost; wherein the target line includes a first target transmission line and a second target transmission line; when the first target transmission line is an AC transmission line, the second target transmission line is a DC transmission line;

[0169] The second determining module 1002 is used to determine the transmission price of the transmission line according to the transmission price of each section of the first target line and the transmission price of each section of the second target line.

[0170] In one embodiment, the first determining module 1001 includes:

[0171] A first determining unit is used to determine a first constraint condition of the objective function according to the upper and lower limits of the transmission electricity price of each section of the target line in the transmission line; the first constraint condition is used to constrain the transmission electricity price of each section in the target line;

[0172] A second determination unit is used to determine a second constraint condition of the objective function according to the unit capacity and transmission capacity of the target line in the transmission line, and the node load of each node in the transmission line; the second constraint condition is used to constrain the transmission power of the target line;

[0173] A third determination unit is used to determine the transmission electricity price of each section in the target line according to the objective function, the first constraint condition and the second constraint condition, with the goal of maximizing the transmission network fee and minimizing the total power generation cost;

[0174] Among them, the objective function is used to characterize the correlation between the transmission electricity price, transmission power and transmission network fee of each section in the target line.

[0175] In one embodiment, the first determining module 1001 further includes:

[0176] The fourth determination unit is used to determine the third constraint condition of the objective function according to the permitted income of each section of the target line in the transmission line; the third constraint condition is used to constrain the transmission price and transmission power of the target line;

[0177] The fifth determination unit is used to determine the transmission electricity price of each section of the target line according to the objective function, the first constraint condition, the second constraint condition and the third constraint condition, with the goal of maximizing the transmission network fee and minimizing the total power generation cost.

[0178] In one embodiment, the apparatus 1000 further includes:

[0179] The third determination module is used to determine the initial function of the target line; the initial function is used to characterize the correlation between the transmission price, transmission power and transmission network fee of the target line;

[0180] The fourth determination module is used to determine the target function according to the corresponding relationship and the initial function; the corresponding relationship includes the corresponding relationship between the transmission price and transmission power of the target line and the transmission price and transmission power of each segment in the target line.

[0181] In one of the embodiments, the first constraint condition includes: the transmission electricity price of each segment in the target line does not exceed the upper and lower limits of the transmission electricity price, and the difference between the transmission electricity price and the lower limit of the transmission electricity price is not greater than a first preset threshold;

[0182] The second constraint condition includes: the transmission power of the target line is not greater than the unit capacity, transmission capacity and node load.

[0183] In one of the embodiments, the third constraint condition includes: the difference between the transmission network fee and the permitted income of each section in the target line is not greater than a second preset threshold.

[0184] Each module in the above-mentioned inter-regional transmission price determination device can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0185] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0186] According to the upper and lower limits of the transmission electricity price of each section of the target line in the transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, with the goal of maximizing the transmission network fee and minimizing the total cost of power generation, the transmission electricity price of each section of the target line is determined; wherein the target line includes a first target transmission line and a second target transmission line; when the first target transmission line is an AC transmission line, the second target transmission line is a DC transmission line;

[0187] The transmission price of the transmission line is determined according to the transmission price of each section of the first target line and the transmission price of each section of the second target line.

[0188] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0189] Determine the first constraint condition of the objective function according to the upper and lower limits of the transmission electricity price of each section of the target line in the transmission line; the first constraint condition is used to constrain the transmission electricity price of each section in the target line;

[0190] Determine the second constraint condition of the objective function according to the unit capacity and transmission capacity of the target line in the transmission line, and the node load of each node in the transmission line; the second constraint condition is used to constrain the transmission power of the target line;

[0191] According to the objective function, the first constraint and the second constraint, the transmission price of each section in the target line is determined with the goal of maximizing the transmission network fee and minimizing the total power generation cost;

[0192] Among them, the objective function is used to characterize the correlation between the transmission electricity price, transmission power and transmission network fee of each section in the target line.

[0193] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0194] Determine the third constraint of the objective function according to the permitted income of each section of the target line in the transmission line; the third constraint is used to constrain the transmission price and transmission power of the target line;

[0195] According to the objective function, the first constraint, the second constraint and the third constraint, the transmission electricity price of each section of the target line is determined with the goal of maximizing the transmission network fee and minimizing the total power generation cost.

[0196] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0197] Determine the initial function of the target line; the initial function is used to characterize the correlation between the transmission price, transmission power and transmission network fee of the target line;

[0198] The target function is determined according to the corresponding relationship and the initial function; the corresponding relationship includes the corresponding relationship between the transmission price and the transmission power of the target line and the transmission price and the transmission power of each section in the target line.

[0199] In one embodiment, the first constraint condition includes: the transmission electricity price of each segment in the target line does not exceed the upper and lower limits of the transmission electricity price, and the difference between the transmission electricity price and the lower limit of the transmission electricity price is not greater than a first preset threshold;

[0200] The second constraint condition includes: the transmission power of the target line is not greater than the unit capacity, transmission capacity and node load.

[0201] In one embodiment, the third constraint condition includes: the difference between the transmission network fee and the permitted income of each section in the target line is not greater than a second preset threshold.

[0202] In one embodiment, a computer readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0203] According to the upper and lower limits of the transmission electricity price of each section of the target line in the transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, with the goal of maximizing the transmission network fee and minimizing the total cost of power generation, the transmission electricity price of each section of the target line is determined; wherein the target line includes a first target transmission line and a second target transmission line; when the first target transmission line is an AC transmission line, the second target transmission line is a DC transmission line;

[0204] The transmission price of the transmission line is determined according to the transmission price of each section of the first target line and the transmission price of each section of the second target line.

[0205] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0206] Determine the first constraint condition of the objective function according to the upper and lower limits of the transmission electricity price of each section of the target line in the transmission line; the first constraint condition is used to constrain the transmission electricity price of each section in the target line;

[0207] Determine the second constraint condition of the objective function according to the unit capacity and transmission capacity of the target line in the transmission line, and the node load of each node in the transmission line; the second constraint condition is used to constrain the transmission power of the target line;

[0208] According to the objective function, the first constraint and the second constraint, the transmission price of each section in the target line is determined with the goal of maximizing the transmission network fee and minimizing the total power generation cost;

[0209] Among them, the objective function is used to characterize the correlation between the transmission electricity price, transmission power and transmission network fee of each section in the target line.

[0210] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0211] Determine the third constraint of the objective function according to the permitted income of each section of the target line in the transmission line; the third constraint is used to constrain the transmission price and transmission power of the target line;

[0212] According to the objective function, the first constraint, the second constraint and the third constraint, the transmission electricity price of each section of the target line is determined with the goal of maximizing the transmission network fee and minimizing the total power generation cost.

[0213] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0214] Determine the initial function of the target line; the initial function is used to characterize the correlation between the transmission price, transmission power and transmission network fee of the target line;

[0215] The target function is determined according to the corresponding relationship and the initial function; the corresponding relationship includes the corresponding relationship between the transmission price and the transmission power of the target line and the transmission price and the transmission power of each section in the target line.

[0216] In one embodiment, the first constraint condition includes: the transmission electricity price of each segment in the target line does not exceed the upper and lower limits of the transmission electricity price, and the difference between the transmission electricity price and the lower limit of the transmission electricity price is not greater than a first preset threshold;

[0217] The second constraint condition includes: the transmission power of the target line is not greater than the unit capacity, transmission capacity and node load.

[0218] In one embodiment, the third constraint condition includes: the difference between the transmission network fee and the permitted income of each section in the target line is not greater than a second preset threshold.

[0219] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0220] According to the upper and lower limits of the transmission electricity price of each section of the target line in the transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, with the goal of maximizing the transmission network fee and minimizing the total cost of power generation, the transmission electricity price of each section of the target line is determined; wherein the target line includes a first target transmission line and a second target transmission line; when the first target transmission line is an AC transmission line, the second target transmission line is a DC transmission line;

[0221] The transmission price of the transmission line is determined according to the transmission price of each section of the first target line and the transmission price of each section of the second target line.

[0222] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0223] Determine the first constraint condition of the objective function according to the upper and lower limits of the transmission electricity price of each section of the target line in the transmission line; the first constraint condition is used to constrain the transmission electricity price of each section in the target line;

[0224] Determine the second constraint condition of the objective function according to the unit capacity and transmission capacity of the target line in the transmission line, and the node load of each node in the transmission line; the second constraint condition is used to constrain the transmission power of the target line;

[0225] According to the objective function, the first constraint and the second constraint, the transmission price of each section in the target line is determined with the goal of maximizing the transmission network fee and minimizing the total power generation cost;

[0226] Among them, the objective function is used to characterize the correlation between the transmission electricity price, transmission power and transmission network fee of each section in the target line.

[0227] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0228] Determine the third constraint of the objective function according to the permitted income of each section of the target line in the transmission line; the third constraint is used to constrain the transmission price and transmission power of the target line;

[0229] According to the objective function, the first constraint, the second constraint and the third constraint, the transmission electricity price of each section of the target line is determined with the goal of maximizing the transmission network fee and minimizing the total power generation cost.

[0230] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0231] Determine the initial function of the target line; the initial function is used to characterize the correlation between the transmission price, transmission power and transmission network fee of the target line;

[0232] The target function is determined according to the corresponding relationship and the initial function; the corresponding relationship includes the corresponding relationship between the transmission price and the transmission power of the target line and the transmission price and the transmission power of each section in the target line.

[0233] In one embodiment, the first constraint condition includes: the transmission electricity price of each segment in the target line does not exceed the upper and lower limits of the transmission electricity price, and the difference between the transmission electricity price and the lower limit of the transmission electricity price is not greater than a first preset threshold;

[0234] The second constraint condition includes: the transmission power of the target line is not greater than the unit capacity, transmission capacity and node load.

[0235] In one embodiment, the third constraint condition includes: the difference between the transmission network fee and the permitted income of each section in the target line is not greater than a second preset threshold.

[0236] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0237] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0238] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for determining inter-regional transmission electricity price, characterized in that: The method comprises: According to the upper and lower limits of the transmission electricity price of each section of the target line in the transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, the transmission electricity price of each section of the target line is determined with the goal of maximizing the transmission network fee and minimizing the total power generation cost; wherein the target line includes a first target transmission line and a second target transmission line; when the first target transmission line is an AC transmission line, the second target transmission line is a DC transmission line; Determining the transmission price of the transmission line according to the transmission price of each section of the first target line and the transmission price of each section of the second target line; The method of determining the transmission price of each section of the target line according to the upper and lower limits of the transmission price of each section of the target line in the transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line with the goal of maximizing the transmission network fee and minimizing the total cost of power generation includes: Determine the first constraint condition of the objective function according to the upper and lower limits of the transmission electricity price of each section of the target line in the transmission line; the first constraint condition includes: the transmission electricity price of each section in the target line does not exceed the upper and lower limits of the transmission electricity price, and the difference between the transmission electricity price and the lower limit of the transmission electricity price is not greater than a first preset threshold value; Determine the second constraint of the objective function according to the unit capacity and transmission capacity of the target line in the transmission line and the node load of each node in the transmission line; the second constraint includes: the transmission power of the target line is not greater than the unit capacity, transmission capacity and node load; According to the objective function, the first constraint condition and the second constraint condition, with the goal of maximizing the transmission network fee and minimizing the total power generation cost, determining the transmission electricity price of each section in the target line; The objective function is expressed as the following formula: In the above formula, O U is the transmission fee of the transmission line, c l is the transmission price of segment l, is the auxiliary variable of the equivalent unit output of the DC transmission line, that is, the transmission power of the DC transmission line. It is an auxiliary variable of the equivalent unit output of the AC transmission line, that is, the transmission power of the AC transmission line.

2. The method according to claim 1, characterized in that The method of determining the transmission price of each section of the target line according to the upper and lower limits of the transmission price of each section of the target line in the transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, with the goal of maximizing the transmission network fee and minimizing the total cost of power generation, also includes: Determining a third constraint condition of the objective function according to the permitted income of each section of the target line in the transmission line; the third constraint condition is used to constrain the transmission price and transmission power of the target line; According to the objective function, the first constraint condition, the second constraint condition and the third constraint condition, the transmission electricity price of each section of the target line is determined with the goal of maximizing the transmission network fee and minimizing the total power generation cost.

3. The method according to claim 1, characterized in that The method further comprises: Determine an initial function of the target line; the initial function is used to characterize the correlation between the transmission price, transmission power and transmission network fee of the target line; The target function is determined according to the corresponding relationship and the initial function; the corresponding relationship includes the corresponding relationship between the transmission price and the transmission power of the target line and the transmission price and the transmission power of each segment in the target line.

4. The method according to claim 2, characterized in that: The third constraint condition includes: the difference between the transmission network fee of each section in the target line and the permitted income is not greater than a second preset threshold.

5. A device for determining inter-regional power transmission price, characterized in that: The device comprises: a first determination module, configured to determine the transmission price of each section of the target line according to the upper and lower limits of the transmission price of each section of the target line in the transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line, with the goal of maximizing the transmission network fee and minimizing the total power generation cost; wherein the target line includes a first target transmission line and a second target transmission line; when the first target transmission line is an AC transmission line, the second target transmission line is a DC transmission line; A second determination module, configured to determine the transmission price of the transmission line according to the transmission price of each section of the first target line and the transmission price of each section of the second target line; The method of determining the transmission price of each section of the target line according to the upper and lower limits of the transmission price of each section of the target line in the transmission line, the permitted income, the unit capacity, the transmission capacity, and the node load of each node in the transmission line with the goal of maximizing the transmission network fee and minimizing the total cost of power generation includes: Determine the first constraint condition of the objective function according to the upper and lower limits of the transmission electricity price of each section of the target line in the transmission line; the first constraint condition includes: the transmission electricity price of each section in the target line does not exceed the upper and lower limits of the transmission electricity price, and the difference between the transmission electricity price and the lower limit of the transmission electricity price is not greater than a first preset threshold value; Determine the second constraint of the objective function according to the unit capacity and transmission capacity of the target line in the transmission line and the node load of each node in the transmission line; the second constraint includes: the transmission power of the target line is not greater than the unit capacity, transmission capacity and node load; According to the objective function, the first constraint condition and the second constraint condition, with the goal of maximizing the transmission network fee and minimizing the total power generation cost, determining the transmission electricity price of each section in the target line; The objective function is expressed as the following formula: In the above formula, O U is the transmission fee of the transmission line, cl is the transmission price of segment l, is the auxiliary variable of the equivalent unit output of the DC transmission line, that is, the transmission power of the DC transmission line. It is an auxiliary variable of the equivalent unit output of the AC transmission line, that is, the transmission power of the AC transmission line.

6. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 4 are implemented.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.

8. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.

Images