A method for allocating capacity costs under the penetration of new energy sources

Abstract

This invention relates to the field of new energy power plant technology, specifically disclosing a method for allocating capacity costs under the penetration of new energy, including: constructing a pumped storage capacity configuration analysis model under different output modes of coal-fired power units based on the output scenarios of coal-fired power units; constructing a capacity cost allocation model for coal-fired power combined with wind and solar power transmission based on the annual power generation of coal-fired power units; constructing a capacity cost allocation model for pumped storage coal-fired power combined with wind and solar power transmission based on the annual power generation of pumped storage power station units; and determining the capacity cost allocation ratio through the pumped storage capacity configuration analysis model, the capacity cost allocation model for coal-fired power combined with wind and solar power transmission, and the capacity cost allocation model for pumped storage coal-fired power combined with wind and solar power transmission.

Description

Technical Field

[0001] This invention relates to the field of new energy power plant technology, and specifically to a method for allocating capacity costs under the penetration of new energy. Background Technology

[0002] With the orderly advancement of China's green and low-carbon energy transformation, coal-fired power is gradually shifting from a power source focused on electricity output to one focused on basic security and system regulation. Coupled with the rapid development of new energy sources, the demand for pumped storage power stations in the power system is increasing. However, a single electricity price cannot guarantee the recovery of fixed costs for coal-fired power units and pumped storage power stations. Establishing a capacity pricing mechanism, which recovers part or all of the fixed costs through capacity pricing, is crucial to stabilizing industry expectations and ensuring the safe, stable operation of the power grid and reliable power supply. Coal-fired power and pumped storage are beginning to adopt a model of "capacity cost subsidies + medium- and long-term electricity market + spot electricity market + power ancillary services market" to obtain reasonable returns for the units. Currently, the capacity pricing for coal-fired power and pumped storage is determined by recovering a certain percentage of fixed costs. How to determine this percentage warrants further research.

[0003] The existing method for allocating the capacity costs of inter-provincial coal-fired power plants mainly relies on the sending and receiving parties specifying the capacity cost sharing ratio through contracts, without a clear method for determining the ratio. Pumped storage power plants allocate capacity costs among the provinces within the region according to a fixed ratio based on investment proportions, but this method is clearly unsuitable for future new power plants, as using investment proportions fails to reflect the function and value of pumped storage power plants in each province.

[0004] Therefore, how to solve the problem of not being able to clearly determine the capacity electricity cost sharing ratio in the existing technology is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] To achieve the objective of this invention, this application provides a method for allocating capacity costs under the penetration of new energy sources, comprising:

[0006] Step S1: Construct an analysis model for pumped storage capacity configuration under different power output modes of coal-fired power units based on their power output scenarios;

[0007] Step S2: Construct a capacity cost allocation model for coal-fired power generation combined with wind and solar power transmission based on the annual power generation of coal-fired power units;

[0008] Step S3: Construct a capacity cost allocation model for pumped storage coal-fired power combined with wind and solar power transmission based on the annual power generation of the pumped storage power station units;

[0009] Step S4: Determine the capacity cost allocation ratio using the pumped storage capacity configuration analysis model, the capacity cost allocation model for coal-fired power combined with wind and solar power transmission, and the capacity cost allocation model for pumped storage coal-fired power combined with wind and solar power transmission.

[0010] In some specific embodiments, the power output scenarios of the coal-fired power unit include: no power output scenario, minimum power output scenario, flexible modification scenario of the coal-fired power unit, and sequential shutdown scenario of the coal-fired power unit.

[0011] In some specific embodiments, step S2 includes:

[0012] Step S21: Calculate the annual power generation of coal-fired power units based on the annual coal-fired power generation obtained within the province and the annual coal-fired power generation obtained from the provinces to which the coal is exported;

[0013] Step S22: Calculate the annual capacity cost subsidy for coal-fired power units;

[0014] Step S23: Calculate the allocation of annual capacity cost of coal-fired power units to industrial and commercial users inside and outside the province based on the annual capacity cost subsidy of the coal-fired power units;

[0015] Step S24: Determine the capacity cost allocation model for coal-fired power combined with wind and solar power transmission based on the allocation results of annual capacity costs of coal-fired power by industrial and commercial users inside and outside the province.

[0016] In some specific embodiments, step S3 includes:

[0017] Step S31: Calculate the annual power generation of the pumped storage power station units based on the annual pumped storage power obtained by the province and the annual pumped storage power obtained by the provinces to which it is exported;

[0018] Step S32: Calculate the annual capacity cost subsidy for pumped storage power station units;

[0019] Step S33: Calculate the allocation of annual capacity cost of pumped storage to industrial and commercial users inside and outside the province based on the annual capacity cost subsidy of all units of the pumped storage power station;

[0020] Step S34: Determine the capacity cost allocation model for pumped storage coal-fired power combined with wind and solar power transmission based on the allocation results of the annual capacity cost of pumped storage by industrial and commercial users inside and outside the province.

[0021] In some specific embodiments, step S4 includes: determining the capacity cost sharing ratio based on the wind and solar power output curves, load curves, technical and economic parameters of coal-fired power units, power generation parameters of pumped storage power station units, annual coal-fired power generation and pumped storage power generation obtained from within and outside the province, and capacity electricity price subsidy parameters of coal-fired power units and pumped storage power station units.

[0022] In some specific embodiments, the output data and load data of coal-fired power units under different scenarios are input into the capacity cost allocation model of coal-fired power combined with wind and solar power transmission and the capacity cost allocation model of pumped storage coal-fired power combined with wind and solar power transmission. The capacity cost allocation model of coal-fired power combined with wind and solar power transmission and the capacity cost allocation model of pumped storage coal-fired power combined with wind and solar power transmission are solved to obtain the allocation ratio of annual capacity cost of coal-fired power and the allocation ratio of annual capacity cost of pumped storage for industrial and commercial users inside and outside the province. Then, the allocation results of annual capacity cost of coal-fired power units and annual capacity cost of pumped storage for industrial and commercial users inside and outside the province are calculated.

[0023] In some specific embodiments, the annual power generation of the coal-fired power unit includes the annual coal-fired power generation obtained within the province and the annual coal-fired power generation obtained from other provinces, as shown below:

[0024]

[0025] In the formula: The annual power generation of coal-fired power units; The annual coal-fired power generation volume obtained by this province; Let represent the annual coal-fired power generation volume obtained by the j-th province.

[0026] In some specific embodiments, the annual capacity cost subsidy for the coal-fired power unit is determined according to the following formula:

[0027]

[0028] In the formula: Subsidies for the annual capacity cost of coal-fired power units; Let n be the rated capacity of the nth coal-fired power unit; This is a capacity electricity price subsidy for coal-fired power units in this province.

[0029] In some specific embodiments, the annual power generation of the pumped storage power station unit includes the annual pumped storage power obtained within the province and the annual pumped storage power obtained from other provinces, as shown below:

[0030]

[0031] In the formula: This refers to the annual power generation of the pumped storage power station units; This refers to the annual pumped storage capacity obtained by the province. This represents the annual pumped storage power obtained by the j-th province.

[0032] In some specific embodiments, the annual capacity cost subsidy for the pumped storage power station unit is determined according to the following formula:

[0033]

[0034] In the formula: Subsidies for the annual capacity cost of all units in pumped storage power stations; Let m be the rated capacity of the m-th pumped storage unit of the pumped storage power station. This is a capacity electricity price subsidy for pumped storage units in this province.

[0035] The beneficial effects of the above technical solution are as follows:

[0036] This invention establishes an inter-provincial capacity cost sharing model for the combined transmission of wind, solar, thermal, and pumped storage power. It calculates the electricity received by coal-fired power units and pumped storage power stations within and outside the province, respectively, to obtain the sharing ratio of capacity costs for industrial and commercial users within and outside the province. It also considers the capacity price subsidies for coal-fired power units and pumped storage units to obtain the sharing results of capacity costs for industrial and commercial users within and outside the province. This invention solves the problem of capacity cost sharing under the penetration of new energy and helps to promote the development of new energy transmission mechanisms. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 A schematic flowchart illustrating a method for allocating capacity costs under the penetration of new energy sources, as provided in an embodiment of the present invention;

[0039] Figure 2 The diagram shows various models of a capacity cost allocation method under the penetration of new energy sources, provided as an embodiment of the present invention. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0041] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0042] Example 1

[0043] One embodiment of the present invention provides a method for allocating capacity costs under the penetration of new energy sources, referring to... Figure 1 , Figure 2 As shown, it includes:

[0044] Step S1: Construct an analysis model for pumped storage capacity configuration under different power output modes of coal-fired power units based on the power output scenarios of coal-fired power units.

[0045] In a specific embodiment of the present invention, the power output scenarios of the coal-fired power unit include: a coal-fired power unit not producing power, a coal-fired power unit with minimum power output, a coal-fired power unit undergoing flexible modification, and a coal-fired power unit being shut down sequentially.

[0046] Because wind and solar power output fluctuates, configuring energy storage can reduce the impact of large-scale new energy integration on the power system. Determining the net load can help determine whether pumped storage is needed and, if so, its capacity. Therefore, this invention considers four different power output modes for coal-fired power plants: no power output, minimum power output, flexible retrofitting, and sequential shutdown. It constructs an analysis model for pumped storage capacity configuration under different power output modes to analyze which scenarios require pumped storage and, if so, what capacity. The specific steps are as follows:

[0047] (1) Scenarios where coal-fired power units are not generating power

[0048] When coal-fired power units are absent or all are shut down, the net load is calculated by subtracting the random output of wind and solar power from the total load.

[0049] In the formula: P represents the net load when the coal-fired power plant is not generating power. t v To contribute to photovoltaic power, P t w It provides power for wind power.

[0050] If it appears In this condition, it is necessary to consider equipping it with a pumping unit:

[0051]

[0052] In the formula: This indicates the maximum capacity that pumped storage needs to be configured when the coal-fired power unit is not generating power.

[0053] (2) Minimum output scenario of coal-fired power units

[0054] When coal-fired power units and wind and solar power output are at their peak, coal-fired power units operate at minimum capacity. The load is then subtracted from the stochastic output of wind and solar power, and further subtracted from the minimum output of coal-fired power units, to arrive at a new net load.

[0055]

[0056] In the formula: The net load at which coal-fired power plants operate at their minimum output. This represents the minimum output of the nth unit.

[0057] If it appears In this condition, pumping is required:

[0058]

[0059] In the formula: This indicates the maximum capacity that pumped storage needs to be configured for the lowest output scenario of a coal-fired power unit.

[0060] (3) Scenarios for the flexible retrofitting of coal-fired power units

[0061] When coal-fired power units and wind and solar power output are at their peak, the coal-fired power units that have undergone flexibility modifications all generate electricity at their minimum output. The minimum output for coal-fired power units undergoing flexibility modifications is... Become (If no modifications are made, then) The load is calculated by subtracting the random output of wind and solar power, and then subtracting the minimum output of coal-fired power plants after flexibility modifications, to form a new net load.

[0062]

[0063] In the formula: The net load for coal-fired power units to generate power after undergoing flexibility modifications. The minimum capacity after the flexibility modification of the coal-fired power unit n is

[0064] If it appears In this condition, pumping is required:

[0065]

[0066]

[0067] In the formula, This indicates the maximum capacity that pumped storage needs to be configured under the minimum output scenario of a coal-fired power unit.

[0068] (4) Scenarios of sequential shutdown of coal-fired power units

[0069] When coal-fired power units and wind and solar power output are at their peak, the coal-fired power units that have undergone flexibility modifications are shut down sequentially, starting with 1 unit, then 2 units, and so on, until N units are shut down. The load is then reduced by the random output of wind and solar power, and then by the minimum output of the remaining coal-fired power units after shutting down units 1 to j, to form the new net load.

[0070]

[0071] In the formula: This represents the net load when coal-fired power units 1 through j are shut down sequentially; j represents the unit being shut down, j = 1, 2, ..., N.

[0072] If it exists Status: Requires pumped storage; maximum capacity of pumped storage configuration.

[0073]

[0074]

[0075]

[0076] Step S2: Construct a capacity cost allocation model for coal-fired power generation combined with wind and solar power transmission based on the annual power generation of coal-fired power units.

[0077] In one specific embodiment of the present invention, step S2 includes:

[0078] Step S21: Calculate the annual power generation of coal-fired power units based on the annual coal-fired power generation obtained within the province and the annual coal-fired power generation obtained from the provinces to which the coal is exported;

[0079] Step S22: Calculate the annual capacity cost subsidy for coal-fired power units;

[0080] Step S23: Calculate the allocation of annual capacity cost of coal-fired power units to industrial and commercial users inside and outside the province based on the annual capacity cost subsidy of the coal-fired power units;

[0081] Step S24: Determine the capacity cost allocation model for coal-fired power combined with wind and solar power transmission based on the allocation results of annual capacity costs of coal-fired power by industrial and commercial users inside and outside the province.

[0082] Step S3: Construct a capacity cost allocation model for pumped storage coal-fired power combined with wind and solar power transmission based on the annual power generation of the pumped storage power station units.

[0083] In one specific embodiment of the present invention, the annual power generation of the coal-fired power unit includes the annual coal-fired power generation obtained within the province and the annual coal-fired power generation obtained from other provinces, as shown below:

[0084]

[0085] In the formula: The annual power generation of coal-fired power units; The annual coal-fired power generation volume obtained by this province; Let represent the annual coal-fired power generation volume obtained by the j-th province.

[0086] In a specific embodiment of the present invention, the annual capacity cost subsidy for the coal-fired power unit is determined according to the following formula:

[0087]

[0088] In the formula: Subsidies for the annual capacity cost of coal-fired power units; Let n be the rated capacity of the nth coal-fired power unit; This is a capacity electricity price subsidy for coal-fired power units in this province.

[0089] Specifically, the allocation of coal-fired power capacity costs by industrial and commercial users is related to the proportion of electricity generated by the coal-fired power units they receive, as follows:

[0090]

[0091] In the formula: This is for the allocation of coal-fired power capacity costs among industrial and commercial users in the province. This is for the allocation of coal-fired power capacity costs among industrial and commercial users in province J.

[0092] In one specific embodiment of the present invention, step S3 includes:

[0093] Step S31: Calculate the annual power generation of the pumped storage power station units based on the annual pumped storage power obtained by the province and the annual pumped storage power obtained by the provinces to which it is exported;

[0094] Step S32: Calculate the annual capacity cost subsidy for pumped storage power station units;

[0095] Step S33: Calculate the allocation of annual capacity cost of pumped storage to industrial and commercial users inside and outside the province based on the annual capacity cost subsidy of all units of the pumped storage power station;

[0096] Step S34: Determine the capacity cost allocation model for pumped storage coal-fired power combined with wind and solar power transmission based on the allocation results of the annual capacity cost of pumped storage by industrial and commercial users inside and outside the province.

[0097] In one specific embodiment of the present invention, the annual power generation of the pumped storage power station unit includes the annual pumped storage power obtained within the province and the annual pumped storage power obtained from other provinces, as shown below:

[0098]

[0099] In the formula: This refers to the annual power generation of the pumped storage power station units; This refers to the annual pumped storage capacity obtained by the province. This represents the annual pumped storage power obtained by the j-th province.

[0100] In a specific embodiment of the present invention, the annual capacity cost subsidy of the pumped storage power station unit is determined according to the following formula:

[0101]

[0102] In the formula: Subsidies for the annual capacity cost of all units in pumped storage power stations; Let m be the rated capacity of the m-th pumped storage unit of the pumped storage power station. This is a capacity electricity price subsidy for pumped storage units in this province.

[0103] Specifically, the allocation of pumped storage capacity costs by industrial and commercial users is related to the proportion of electricity generated by the pumped storage units they receive, as follows:

[0104]

[0105]

[0106] In the formula: The cost of pumped storage capacity is allocated to industrial and commercial users in this province. This is for the allocation of annual pumped storage capacity costs for industrial and commercial users in province J.

[0107] Step S4: Determine the capacity cost allocation ratio using the pumped storage capacity configuration analysis model, the capacity cost allocation model for coal-fired power combined with wind and solar power transmission, and the capacity cost allocation model for pumped storage coal-fired power combined with wind and solar power transmission.

[0108] In a specific embodiment of the present invention, step S4 includes: determining the capacity cost sharing ratio based on the wind and solar power output curves, load curves, technical and economic parameters of coal-fired power units, power generation parameters of pumped storage power station units, annual coal-fired power generation and pumped storage power generation obtained from within and outside the province, and capacity electricity price subsidy parameters of coal-fired power units and pumped storage power station units.

[0109] In some specific embodiments, the output data and load data of coal-fired power units under different scenarios are input into the capacity cost allocation model of coal-fired power combined with wind and solar power transmission and the capacity cost allocation model of pumped storage coal-fired power combined with wind and solar power transmission. The capacity cost allocation model of coal-fired power combined with wind and solar power transmission and the capacity cost allocation model of pumped storage coal-fired power combined with wind and solar power transmission are solved to obtain the allocation ratio of annual capacity cost of coal-fired power and the allocation ratio of annual capacity cost of pumped storage for industrial and commercial users inside and outside the province. Then, the allocation results of annual capacity cost of coal-fired power units and annual capacity cost of pumped storage for industrial and commercial users inside and outside the province are calculated.

[0110] Specifically, the output data of wind power, photovoltaic power, and coal-fired power units under different scenarios, as well as load data, are input into the capacity cost allocation models for coal-fired power combined with wind and solar power transmission and pumped-storage coal-fired power combined with wind and solar power transmission. The net load value for each scenario is then calculated. Analyze the net load. If the net load is less than zero, pumped storage needs to be configured to obtain the maximum capacity that pumped storage needs to be configured in each scenario.

[0111] Solve the capacity cost allocation model for coal-fired power generation combined with wind and solar power transmission. Input the annual power generation of the coal-fired power plant units. Coal-fired power generation from within and outside the province and Rated capacity of coal-fired power units and provincial coal-fired power unit capacity electricity price subsidy Based on the data, the allocation ratio of annual capacity costs of coal-fired power plants for industrial and commercial users inside and outside the province was obtained, and the allocation results of annual capacity costs of coal-fired power units for industrial and commercial users inside and outside the province were calculated. and

[0112] Solve the capacity cost allocation model for pumped-storage coal-fired power plants combined with wind and solar power transmission. Input the annual power generation of the pumped-storage power plant. Pumped storage power obtained from within and outside the province and Rated capacity of pumped storage power station units and provincial pumped storage unit capacity electricity price subsidy Based on the data, the allocation ratio of annual pumped storage capacity costs for industrial and commercial users both inside and outside the province was obtained, and the allocation results of annual pumped storage capacity costs for industrial and commercial users both inside and outside the province were calculated. and

[0113] The approach of this invention for allocating capacity costs under the penetration of new energy sources is to calculate the net load of the system under different output modes of coal-fired power plants, determine the necessity of configuring pumped storage power stations, obtain the configuration capacity of pumped storage power stations, calculate the annual capacity cost subsidies for all units of coal-fired power plants and pumped storage power stations respectively, determine the electricity ratio of coal-fired power units and pumped storage power stations obtained between provinces and within provinces, and thus obtain the capacity cost allocation results for industrial and commercial users inside and outside the province.

[0114] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

[0115] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The embodiments of the present invention are described with reference to flowchart illustrations and / or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 The computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing terminal device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The functions specified in one or more boxes. These computer program instructions may also be loaded onto a computer or other programmable data processing terminal equipment to cause a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1The steps of the functions specified in one or more boxes. Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the invention. Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0116] The methods and apparatus provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

[0117] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "a specific embodiment" or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0118] Finally, it should be noted that 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.

Claims

1. A method for allocating capacity costs under the penetration of new energy sources, characterized in that, include: Step S1: Based on the output scenarios of coal-fired power units, construct an analysis model for pumped storage capacity configuration under different output modes of coal-fired power units; Step S2: Based on the annual power generation of coal-fired power units, construct a capacity cost allocation model for coal-fired power combined with wind and solar power transmission. Step S3: Based on the annual power generation of the pumped storage power station units, construct a capacity cost allocation model for pumped storage coal-fired power combined with wind and solar power transmission. Step S4: Determine the capacity cost allocation ratio using the pumped storage capacity configuration analysis model, the capacity cost allocation model for coal-fired power combined with wind and solar power transmission, and the capacity cost allocation model for pumped storage coal-fired power combined with wind and solar power transmission. Step S2 includes: Step S21: Calculate the annual power generation of coal-fired power units based on the annual coal-fired power generation obtained within the province and the annual coal-fired power generation obtained from the provinces to which the coal is exported; Step S22: Calculate the annual capacity cost subsidy for coal-fired power units; Step S23: Calculate the allocation of annual capacity cost of coal-fired power units to industrial and commercial users inside and outside the province based on the annual capacity cost subsidy of the coal-fired power units; Step S24: Determine the capacity cost allocation model for coal-fired power combined with wind and solar power transmission based on the allocation results of annual capacity costs of coal-fired power by industrial and commercial users inside and outside the province; Step S3 includes: Step S31: Calculate the annual power generation of the pumped storage power station units based on the annual pumped storage power obtained by the province and the annual pumped storage power obtained by the provinces to which it is exported; Step S32: Calculate the annual capacity cost subsidy for pumped storage power station units; Step S33: Calculate the allocation of annual capacity cost of pumped storage to industrial and commercial users inside and outside the province based on the annual capacity cost subsidy of all units of the pumped storage power station; Step S34: Determine the capacity cost allocation model for pumped storage coal-fired power combined with wind and solar power transmission based on the allocation results of the annual capacity cost of pumped storage by industrial and commercial users inside and outside the province; Step S4 includes: determining the capacity cost allocation ratio based on the wind and solar power output curves, load curves, technical and economic parameters of coal-fired power units, power generation parameters of pumped storage power station units, annual coal-fired power generation and pumped storage power generation obtained from within and outside the province, and capacity electricity price subsidy parameters of coal-fired power units and pumped storage power station units. Step S4 includes: inputting the output data and load data of coal-fired power units under different scenarios into the capacity cost allocation model of coal-fired power combined with wind and solar power transmission and the capacity cost allocation model of pumped storage coal-fired power combined with wind and solar power transmission, solving the capacity cost allocation model of coal-fired power combined with wind and solar power transmission and the capacity cost allocation model of pumped storage coal-fired power combined with wind and solar power transmission, obtaining the allocation ratio of annual capacity cost of coal-fired power and the allocation ratio of annual capacity cost of pumped storage for industrial and commercial users inside and outside the province, and then calculating the allocation results of annual capacity cost of coal-fired power units and annual capacity cost of pumped storage for industrial and commercial users inside and outside the province.

2. The method for allocating capacity costs under new energy penetration according to claim 1, characterized in that, The power output scenarios of the coal-fired power units include: coal-fired power units not producing power, coal-fired power units at minimum output, coal-fired power units undergoing flexible modification, and coal-fired power units being shut down sequentially.

3. The method for allocating capacity costs under new energy penetration according to claim 1, characterized in that, The annual power generation of the coal-fired power units includes the annual coal-fired power generation obtained within the province and the annual coal-fired power generation obtained from other provinces, as shown below: In the formula: The annual power generation of coal-fired power units; The annual coal-fired power generation volume obtained by this province; Let represent the annual coal-fired power generation volume obtained by the j-th province.

4. The method for allocating capacity costs under new energy penetration according to claim 1, characterized in that, The annual capacity cost subsidy for the coal-fired power units is determined according to the following formula: In the formula: Subsidies for the annual capacity cost of coal-fired power units; Let n be the rated capacity of the nth coal-fired power unit; This is a capacity electricity price subsidy for coal-fired power units in this province.

5. The method for allocating capacity costs under new energy penetration according to claim 1, characterized in that, The annual power generation of the pumped storage power station units includes the annual pumped storage power received by the province and the annual pumped storage power received by other provinces, as shown below: In the formula: This refers to the annual power generation of the pumped storage power station units; This refers to the annual pumped storage capacity obtained by the province. This represents the annual pumped storage power obtained by the j-th province.

6. The method for allocating capacity costs under the penetration of new energy sources according to claim 1, characterized in that, The annual capacity cost subsidy for the pumped storage power station units is determined according to the following formula: In the formula: Subsidies for the annual capacity cost of all units in pumped storage power stations; Let m be the rated capacity of the m-th pumped storage unit of the pumped storage power station. This is a capacity electricity price subsidy for pumped storage units in this province.

Images