Method and system for improving low-carbon benefits of new energy transmission considering long-term sections

Abstract

The present invention relates to a method and system for improving the low-carbon benefits of new energy transmission in consideration of long-term sections, including: analyzing the output characteristics of new energy under long-term sections to determine the proportion of new energy in the transmission channel; determining the relationship between new energy output and carbon emissions based on the proportion of new energy in the transmission channel; setting the maximum transmission capacity of the transmission channel as the optimization target according to the relationship between new energy output and carbon emissions, and setting constraints to solve the optimization target to obtain the carbon emission value of new energy transmission in long-term sections. The present invention obtains the carbon emission value of new energy transmission and the existing carbon emission results by comparative calculation, and has a significant low-carbon effect, which effectively improves the overall low-carbon effect of new energy transmission, which will help achieve the dual carbon goals, and also provide a basis for the construction of long-distance power grid planning and the formulation of relevant policies by government departments.

Description

Technical Field

[0001] The present invention relates to a method and system for improving the low-carbon benefits of new energy transmission by taking long-term sections into consideration, and relates to the field of new energy technology. Background Art

[0002] In order to promote my country's development goals of "carbon peak and carbon neutrality", it is required that non-fossil energy account for about 25% of primary energy consumption by 2030. By gradually increasing the proportion of new energy such as wind power and photovoltaic power connected to the grid in the transmission system, the low-carbon benefits of the transmission system can be effectively improved.

[0003] During the large-scale grid-connected and transmission process of new energy, the output of some traditional thermal power units is replaced. Although the frequent start and stop of traditional thermal power units increases carbon dioxide emissions, the overall reduction in carbon dioxide emissions will be greater than the increase, and the low-carbon effect is obvious.

[0004] In the existing low-carbon benefit improvement technologies, the impact of the transmission channel capacity on its low-carbon benefits is not taken into account, resulting in the improvement effect deviating from the actual working conditions. Summary of the invention

[0005] In response to the above problems, the purpose of the present invention is to provide a method and system for improving the low-carbon benefits of new energy transmission by taking into account long-term sections, which can enhance the overall low-carbon effect of new energy transmission and contribute to the realization of the dual carbon goals.

[0006] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is:

[0007] In a first aspect, the present invention provides a method for improving the low-carbon benefits of new energy transmission considering long-term sections, comprising:

[0008] Analyze the output characteristics of renewable energy in long-term sections and determine the proportion of renewable energy in the transmission channel;

[0009] Based on the proportion of renewable energy in the transmission channel, determine the relationship between renewable energy output and carbon emissions;

[0010] According to the relationship between new energy output and carbon emissions, the maximum transmission capacity of the transmission channel is set as the optimization goal, and constraints are set to solve the optimization goal to obtain the carbon emission value of the new energy transmission in a long-term section.

[0011] Furthermore, the output characteristics of renewable energy in long-term sections are analyzed to determine the proportion of renewable energy in the transmission channel, including:

[0012] By analyzing the output characteristics of new energy every hour throughout the year, that is, the output situation at the 8760 time section, we can determine the proportion in the transmission channel and determine the thermal power units that need to be configured to achieve power balance between the sending and receiving ends.

[0013] Furthermore, based on the proportion of new energy in the transmission channel, the relationship between new energy output and carbon emissions is determined, including: according to the configured thermal power units, the carbon emissions of the thermal power units are obtained, and then the relationship between new energy output and carbon emissions is obtained:

[0014]

[0015] In the formula, is the carbon emission of the external transmission system; E is the carbon emission factor, t is the time section, T = 8760, P t , total is the total power load for long-term transmission, P t,wt , P t,pv is the wind power and photovoltaic power under long-term section. The smaller it is, the more obvious the low-carbon effect of carbon emissions is, and vice versa.

[0016] Furthermore, it is determined that the factor that restricts the improvement of low-carbon benefits in the external transmission channel is the transmission capacity of the external transmission channel.

[0017] Furthermore, according to the relationship between new energy output and carbon emissions, the maximum transmission capacity of the transmission channel is set as the optimization goal, that is:

[0018]

[0019] Where P t,ther is the current power value of thermal power.

[0020] Furthermore, the constraints include equality constraints and inequality constraints for various units, including:

[0021] Set the output constraints of renewable energy in the transmission system, namely:

[0022] 0≤P t,wt ≤P max,wt

[0023] 0≤P t,pv ≤P max,pv

[0024] Where P max,wt , P max,pv The maximum output of wind power and photovoltaic new energy in the transmission system;

[0025] Set related constraints for conventional thermal power units;

[0026] Set the power balance constraints, namely:

[0027]

[0028] Where P t,wt , Pt,pv , P t,ther , P t,L are the current power values ​​of wind power, photovoltaic power, thermal power and load in period t respectively.

[0029] Furthermore, related constraints of conventional thermal power units are set, including:

[0030] Set the constraints for conventional thermal power units, namely:

[0031]

[0032] In the formula, P represents the operating status of unit j in period t. t,j is the output of conventional thermal power units; P min,j , P max,j is the maximum and minimum output of conventional thermal power unit j;

[0033] Set the ramp constraints for conventional thermal power units, namely:

[0034] P t+1,j -P t,j ≤P up,j Δt

[0035] P t,j -P t+1,j ≤P down,j Δt

[0036] Where P up,j and P down,j is the maximum and minimum ramp power of conventional thermal power units in period t, and Δt is the operating period of conventional thermal power units;

[0037] Set the start and stop constraints of conventional thermal power units, namely:

[0038]

[0039]

[0040] Where Y t,j and Z t,j is the start and stop status of unit j in period t. t,j and Z t,j If 1 is set, the unit is in the startup state, otherwise it is in the shutdown state. on and k off is the minimum startup and shutdown time of unit j in period t.

[0041] In a second aspect, the present invention also provides a system for improving the low-carbon benefits of new energy transmission considering long-term sections, and the system comprises:

[0042] The first unit is configured to analyze the output characteristics of renewable energy under long-term sections and determine the proportion of renewable energy in the transmission channel;

[0043] The second unit is configured to determine the relationship between the output of renewable energy and carbon emissions based on the proportion of renewable energy in the transmission channel;

[0044] The third unit is configured to set the maximum transmission capacity of the transmission channel with constraints as the optimization target according to the relationship between the output characteristics of new energy and the low-carbon effect under the long-term section;

[0045] The fourth unit is configured to set constraints, solve the above optimization objectives, and obtain the carbon emission value of the delivered new energy in a long-term section.

[0046] In a third aspect, the present invention further provides an electronic device, comprising computer program instructions, wherein the program instructions are used to implement the described method when executed by a processor.

[0047] In a fourth aspect, the present invention further provides a computer-readable storage medium having computer program instructions stored thereon, wherein the program instructions are used to implement the described method when executed by a processor.

[0048] The present invention adopts the above technical solution, and has the following characteristics:

[0049] 1. The present invention analyzes the output characteristics of new energy under long-term sections to determine the proportion of new energy in the transmission channel; based on the proportion of new energy in the transmission channel, the relationship between new energy output and carbon emissions is determined; according to the relationship between new energy output and carbon emissions, the maximum transmission capacity of the transmission channel is set as the optimization target, and constraints are set to solve the optimization target, and the carbon emission value of the new energy for transmission over a long period of time is obtained. The carbon emission value of the new energy for transmission is obtained by comparative calculation with the existing carbon emission results, and the low-carbon effect is significant.

[0050] 2. Compared with previous improvement methods, in order to improve the utilization rate of clean energy and reduce carbon emissions, the present invention is based on the 8760 time section throughout the year, focusing on analyzing the output characteristics of typical low-carbon power sources such as wind power and photovoltaics, judging whether the power balance between the sending and receiving ends can be met, and identifying the key factors that restrict the low-carbon benefits of exporting new energy, namely the transmission capacity of the export transmission channel (the peak-shaving capacity of the export system). Improving the overall low-carbon effect of exporting new energy will help achieve the dual carbon goals, and also provide a basis for the planning and construction of long-distance power grids and the formulation of relevant policies by governments and other departments. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference numerals are used to represent the same components. In the accompanying drawings:

[0052] Figure 1 is a flow chart of a method according to an embodiment of the present invention;

[0053] Figure 2 FIG. 4 is a structural diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0054] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0055] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0056] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside", "outside", "inner side", "outside", "below", "above", etc. Such spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures.

[0057] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0058] Embodiment 1: Figure 1 As shown, the method for improving the low-carbon benefits of new energy transmission considering long-term sections provided in this embodiment includes:

[0059] S1. Analyze the output characteristics of wind power and photovoltaic power to determine the proportion of new energy in the transmission channel.

[0060] Specifically, new energy sources such as wind power and photovoltaics have zero carbon emissions and are typical low-carbon power sources. By analyzing the output characteristics every hour throughout the year, that is, the output situation under the section of 8760 time (365 days * 24 hours a day = 8760 hours), it can be seen that wind power and photovoltaics show obvious output intermittency and strong uncertainty, and they are complementary to each other, which helps to judge the proportion of new energy in the transmission channel and determine the need to configure thermal power units to achieve power balance between the sending and receiving ends.

[0061] S2. Determine the relationship between new energy output and carbon emissions

[0062] Specifically, thermal power units are configured to balance the power at the sending and receiving ends. Due to the uncertain characteristics of wind power and photovoltaic power, in order to stabilize the power balance at both ends of the transmission channel, thermal power units with a certain installed capacity need to be configured. However, frequent start and stop of thermal power units increases carbon dioxide emissions and reduces the low-carbon effect of the transmission channel.

[0063] Assuming the external power P under long-term section t,total , wind power and photovoltaic power under long-term section, that is, P t,wt , P t , pv , subtracting the output of wind power, photovoltaic power and other new energy sources from the entire transmission channel, we can get the carbon emissions of thermal power and other units, that is:

[0064]

[0065] In the formula, is the carbon emission of the external transmission system; E is the carbon emission factor, which is generally taken as 0.414 kg / kW.h; t is the time section. The present invention analyzes the low-carbon benefits per hour throughout the year and takes T=8760.

[0066] It can be clearly seen from the above formula that the relationship between the output of new energy such as wind power and photovoltaic power and the improvement of low-carbon effects isc The smaller the o2, the more obvious the low-carbon effect, and vice versa.

[0067] S3. Based on the relationship between the output characteristics of new energy and low-carbon effects under long-term sections, and with the goal of maximizing the transmission capacity of the transmission channel that constrains the transmission factor, a method to improve the low-carbon benefits of transmitting new energy over long-term sections is proposed.

[0068] In order to improve the low-carbon efficiency of the transmission channel, combined with the proportion of wind power, photovoltaic and other new energy sources in the transmission channel under the 8760 time section, the factors that affect the improvement of low-carbon efficiency in the transmission channel are determined. Specifically, the transmission capacity of the transmission channel is the key factor that restricts the improvement of the low-carbon effect of the transmission of new energy under long-term sections. By continuously enhancing the transmission capacity of the transmission channel and increasing the proportion of new energy grid-connected electricity, the low-carbon effect will be more obvious.

[0069] That is, the optimization objective function is set as:

[0070]

[0071] S4. In the process of new energy transmission, there must be both optimization targets and certain constraints on target optimization, including equality constraints and inequality constraints for various units, as follows:

[0072] S41. Set output constraints for wind power, photovoltaic power and other new energy sources in the transmission system:

[0073] 0≤P t,wt ≤P max,wt

[0074] 0≤P t,pv ≤P max,pv

[0075] Where P max,wt , P max,pv It is the maximum output of wind power and photovoltaic new energy in the transmission system.

[0076] S42. Set constraints for conventional thermal power units

[0077] The optimization objective function is to maximize the export of new energy. In order to achieve a balance between supply and demand load, thermal power plays a peak-shaving role, but it cannot be started and stopped frequently. The more times it is started and stopped, the higher the cost and carbon emissions will be, which will directly affect the low-carbon effect of the system under long-term sections. Therefore, it is necessary to add constraints on thermal power units.

[0078] 1) Specifically, traditional thermal power units with regulation capabilities are encouraged to conduct deep regulation in order to increase the level of consumption of new energy, and constraints on conventional thermal power units are set, namely:

[0079]

[0080] In the formula, P represents the operating status of unit j in period t, 1 indicates that the conventional thermal power unit is running, and 0 indicates that the conventional thermal power unit is shut down; t,j is the output of conventional thermal power units; P min,j , P max,j is the maximum and minimum output of conventional thermal power unit j.

[0081] 2) Set the ramp constraints for conventional thermal power units, namely:

[0082] P t+1,j -P t,j ≤P up,j Δt

[0083] P t,j -P t+1,j ≤P down,j Δt

[0084] Where P up,j and P down,j is the maximum and minimum ramp power of conventional thermal power units in period t; Δt is the operating period of conventional thermal power units.

[0085] 3) Set the start and stop constraints of conventional thermal power units, namely:

[0086] Specifically, due to the physical characteristics of conventional thermal power units and the increase in carbon dioxide emissions caused by frequent start-up and shutdown, the number of start-up and shutdown times is reduced as much as possible, and the start-up and shutdown constraints of conventional thermal power units are set, namely:

[0087]

[0088]

[0089] Where Y t,j and Z t,j is the start and stop status of unit j in period t. t,j and Z t,j 1 indicates the unit is in the startup state, otherwise it is in the shutdown state; k on and k off is the minimum startup and shutdown time of unit j in period t.

[0090] S43. Setting power balance constraints

[0091] To ensure the continuous and reliable power supply demand of the demand-side power grid to the load, the power balance constraint must be met, namely:

[0092]

[0093] Where P t,wt , Pt,pv , P t,ther , P t,L are the current power values ​​of wind power, photovoltaic power, thermal power and load in period t respectively.

[0094] S5. The method of improving the low-carbon benefits of new energy transmission over long sections involves a large scale of variables. Among them, the output of wind and solar power is unstable, and thermal power units are frequently faced with start-up and shutdown. It is a mixed integer programming problem. With the help of MATLAB software, CPLEX is called to solve the above optimization objectives and obtain the carbon emission value of new energy transmission over long sections. By comparing the carbon emission value of new energy transmission with the existing carbon emission results, the low-carbon effect is significant.

[0095] Embodiment 2: The above-mentioned embodiment 1 provides a method for improving the low-carbon benefits of new energy delivered by considering long sections. Correspondingly, this embodiment provides a system for improving the low-carbon benefits of new energy delivered by considering long sections. The system provided in this embodiment can implement the method for improving the low-carbon benefits of new energy delivered by considering long sections of embodiment 1, and the system can be implemented by software, hardware, or a combination of software and hardware. For the convenience of description, the functions of this embodiment are divided into various units and described separately. Of course, the functions of each unit can be implemented in the same or more software and / or hardware during implementation. For example, the system may include integrated or separate functional modules or functional units to perform the corresponding steps in each method of embodiment 1. Since the system of this embodiment is basically similar to the method embodiment, the description process of this embodiment is relatively simple. For relevant parts, please refer to the partial description of embodiment 1. The embodiment of the system for improving the low-carbon benefits of new energy delivered by considering long sections provided by the present invention is only schematic.

[0096] This embodiment provides a system for improving the low-carbon benefits of new energy transmission considering long-term sections, the system comprising:

[0097] The first unit is configured to analyze the output characteristics of renewable energy under long-term sections and determine the proportion of renewable energy in the transmission channel;

[0098] The second unit is configured to determine the relationship between the output of renewable energy and carbon emissions based on the proportion of renewable energy in the transmission channel;

[0099] The third unit is configured to set the maximum transmission capacity of the transmission channel with constraints as the optimization target according to the relationship between the output characteristics of new energy and the low-carbon effect under the long-term section;

[0100] The fourth unit is configured to set constraints, solve the above optimization objectives, and obtain the carbon emission value of the delivered new energy in a long-term section.

[0101] Embodiment 3: This embodiment provides an electronic device corresponding to the method for improving the low-carbon benefits of delivering new energy taking into account long-term sections provided in Embodiment 1. The electronic device can be an electronic device used for a client, such as a mobile phone, a laptop computer, a tablet computer, a desktop computer, etc., to execute the method of Embodiment 1.

[0102] like Figure 2 As shown, the electronic device includes a processor, a memory, a communication interface and a bus, and the processor, the memory and the communication interface are connected through the bus to complete mutual communication. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus or an Extended Industry Standard Component (EISA) bus, etc. The memory stores a computer program that can be run on the processor, and when the processor runs the computer program, it executes the method for improving the low-carbon benefits of transmitting new energy considering long-term sections provided in the first embodiment. Those skilled in the art can understand that Figure 2 The structure shown in the figure is only a block diagram of a part of the structure related to the scheme of the present application, and does not constitute a limitation on the computing device to which the scheme of the present application is applied. The specific computing device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0103] In some implementations, the logic instructions in the above-mentioned memory can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art, and the computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), optical disk and other media that can store program codes.

[0104] In some other implementations, the processor may be a central processing unit (CPU), a digital signal processor (DSP), or other general-purpose processors of various types, which are not limited herein.

[0105] Embodiment 4: The method for improving the low-carbon benefits of transmitting new energy by considering long-term sections of the first embodiment can be specifically implemented as a computer program product. The computer program product may include a computer-readable storage medium on which computer-readable program instructions are loaded for executing the method for improving the low-carbon benefits of transmitting new energy by considering long-term sections of the first embodiment.

[0106] Computer readable storage media can be tangible devices that hold and store instructions used by instruction execution devices. Computer readable storage media can be, for example, but not limited to, electronic storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any combination thereof.

[0107] Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. In the description of this specification, the description of the reference terms "one embodiment", "some implementations", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of this specification. In this specification, the schematic representation of the above terms does not necessarily target the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0108] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0109] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0110] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for improving the low-carbon benefits of new energy transmission considering long-term sections, characterized in that include: Analyze the output characteristics of renewable energy under long-term sections and determine the proportion of renewable energy in the transmission channel, including: by analyzing the output characteristics of renewable energy every hour throughout the year, that is, the output situation under the 8760 time section, determine the proportion in the transmission channel and determine the thermal power units that need to be configured to achieve power balance between the sending and receiving ends; Based on the proportion of renewable energy in the transmission channel, the relationship between renewable energy output and carbon emissions is determined, including: According to the configured thermal power units, the carbon emissions of the thermal power units are obtained, and then the relationship between the output of new energy and carbon emissions is obtained: In the formula, is the carbon emission of the external transmission system; E is the carbon emission factor, t is the time section, T = 8760, P t,total is the total power load for transmission under long-term section, P t,wt , P t,pv is the wind power and photovoltaic power under long-term section. The smaller it is, the more obvious the low-carbon effect of carbon emissions is, and vice versa; According to the relationship between new energy output and carbon emissions, the maximum transmission capacity of the transmission channel is set as the optimization goal, and constraints are set to solve the optimization goal to obtain the carbon emission value of the new energy transmission in a long-term section; the optimization goal is: Where P t,ther is the current power value of thermal power.

2. The method for improving the low-carbon benefits of new energy delivery considering long-term sections according to claim 1 is characterized in that: The constraints include equality constraints and inequality constraints for various units, including: Set the output constraints of renewable energy in the transmission system, namely: 0≤P t,wt ≤P max,wt 0≤P t,pv ≤P max,pv Where P max,wt , P max,pv The maximum output of wind power and photovoltaic new energy in the transmission system; Set related constraints for conventional thermal power units; Set the power balance constraints, namely: Where P t,wt , P t,pv , P t,ther , P t,L are the current power values ​​of wind power, photovoltaic power, thermal power and load in period t respectively.

3. The method for improving the low-carbon benefits of new energy delivery considering long-term sections according to claim 2 is characterized in that: Set related constraints for conventional thermal power units, including: Set the constraints for conventional thermal power units, namely: In the formula, P represents the operating status of unit j in period t. t,j is the output of conventional thermal power units; P min,j , P max,j is the maximum and minimum output of conventional thermal power unit j; Set the ramp constraints for conventional thermal power units, namely: P t+1,j -P t,j ≤P up,j Δt P t,j -P t+1,j ≤P down,j Δt Where P up,j and P down,j is the maximum and minimum ramp power of conventional thermal power units in period t, and Δt is the operating period of conventional thermal power units; Set the start and stop constraints of conventional thermal power units, namely: Where Y t,j and Z t,j is the start and stop status of unit j in period t. t,j and Z t,j If 1 is set, the unit is in the startup state, otherwise it is in the shutdown state. on and k off is the minimum startup and shutdown time of unit j in period t.

4. A system for improving the low-carbon benefits of new energy transmission considering long-term sections, characterized in that: The system includes: The first unit is configured to analyze the output characteristics of renewable energy under long-term sections and determine the proportion of renewable energy in the transmission channel, including: by analyzing the output characteristics of renewable energy every hour throughout the year, that is, the output situation under the 8760 time section, determining the proportion in the transmission channel and determining the thermal power units that need to be configured, so that the power of the sending and receiving ends is balanced; The second unit is configured to determine the relationship between renewable energy output and carbon emissions based on the proportion of renewable energy in the transmission channel, including: According to the configured thermal power units, the carbon emissions of the thermal power units are obtained, and then the relationship between the output of new energy and carbon emissions is obtained: In the formula, is the carbon emission of the external transmission system; E is the carbon emission factor, t is the time section, T = 8760, P t,total is the total power load for transmission under long-term section, P t,wt , P t,pv is the wind power and photovoltaic power under long-term section. The smaller it is, the more obvious the low-carbon effect of carbon emissions is, and vice versa; The third unit is configured to set the maximum transmission capacity of the transmission channel with constraints as the optimization target according to the relationship between the output characteristics of new energy and the low-carbon effect under long-term sections, that is: Where P t,ther is the current power value of thermal power; The fourth unit is configured to set constraints, solve the above optimization objectives, and obtain the carbon emission value of the delivered new energy in a long-term section.

5. An electronic device, characterized in that: The method comprises computer program instructions, wherein the program instructions are used to implement the method according to any one of claims 1 to 3 when executed by a processor.

6. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer program instructions, wherein the program instructions are used to implement the method according to any one of claims 1 to 3 when executed by a processor.

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