Section load rate calculation method and system considering new energy uncertainty

Abstract

The invention discloses a section load rate calculation method and system considering new energy uncertainty, and belongs to the technical field of electric power automation. The section load rate calculation method comprises the steps that a new energy section limit value is acquired; obtaining a load prediction value in the section, and calculating to obtain a total load prediction demand in the section; obtaining a power generation prediction value in the section, calculating to obtain a total power generation prediction amount in the section, and calculating to obtain new energy output power in the section according to the total load prediction demand amount in the section and the total power generation prediction amount in the section; and calculating the new energy section load rate according to the new energy transmission power in the section and the new energy section limit value. According to the invention, through real-time whole-network balance, the flexibility and adjustment capability of the power system are enhanced, and the stability and reliability of power supply are ensured. When the new energy section load rate obtained through calculation reaches a section safety limit value, a corresponding market is started, a market operation mechanism publishes market opening information such as a market bidding space curve of a bidding day on an operation day, and new energy consumption is promoted.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric power automation, and in particular relates to a method and system for calculating a section load rate taking into account the uncertainty of new energy sources. Background Art

[0002] With the rapid advancement of new power systems, the installed capacity of wind power, photovoltaic power and other power generation has increased significantly, and promoting the consumption of new energy has become a top priority. At this stage, the main problem of new energy consumption is that the growth rate of installed capacity far exceeds the speed of grid construction, resulting in insufficient transmission capacity of channels (new energy centralized transmission channels with fixed active power limits formed due to thermal stability limits of grid equipment, referred to as "sections"). Through market-oriented means, the efficient optimization of power resources allocation provides a new way for the large-scale consumption of new energy in the market. The operating organization organizes market operations according to the scope of the section and starts the market when the section is limited.

[0003] The output of new energy sources such as wind power and photovoltaic power generation is affected by many factors such as climate, season, geographical conditions, local meteorology, etc., and has significant volatility and uncertainty. This uncertainty limits the prediction accuracy of new energy power generation, which in turn affects the accurate calculation of the section load rate. With the increase in the penetration rate of new energy, the changes in the power system flow have become more complex. The traditional power flow calculation method may not accurately reflect the power system flow distribution after the access of new energy, resulting in deviations in the calculation results of the section load rate. Considering the uncertainty of new energy, how to construct a reasonable section load rate calculation model is a difficult point. The model needs to be able to accurately reflect the relationship between new energy output, power system flow and section load rate, and also needs to consider a variety of constraints, such as the safe and stable operation of the power grid, and the power constraints of new energy generation. It is necessary to conduct in-depth research on the characteristics of new energy generation, the characteristics of the power system flow and the calculation method of the section load rate to ensure the accuracy and practicality of the model. When calculating the section load rate, a large amount of data needs to be obtained, including renewable energy output data, power system flow data, and historical section load rate data. These data may come from different data sources and have different formats and qualities. The data acquisition and processing process also needs to be studied and considered to support large-scale data processing and analysis. Considering the uncertainty of renewable energy, the calculation of section load rate may need to consider multiple time sections and multiple renewable energy output scenarios, which leads to a huge amount of calculation and places high demands on calculation efficiency and real-time performance. Summary of the invention

[0004] The purpose of the present invention is to address the problems in the above-mentioned prior art and provide a method and system for calculating the section load rate that takes into account the uncertainty of new energy. Based on the new energy and load forecast data in the section, the section new energy output power is obtained, and the section load rate is calculated. Through real-time whole-network balancing, the flexibility and regulation capability of the power system are enhanced, the stability and reliability of the power supply are ensured, and the market-oriented large-scale consumption of new energy is promoted.

[0005] In order to achieve the above object, the present invention has the following technical solutions:

[0006] In a first aspect, a method for calculating a section load rate taking into account the uncertainty of new energy is provided, including:

[0007] Get the new energy section limit;

[0008] Obtain the load forecast value within the section and calculate the total load forecast demand within the section;

[0009] Obtain the predicted power generation value within the section and calculate the predicted total power generation within the section;

[0010] The power output of renewable energy in the section is calculated based on the total predicted load demand and the total predicted power generation in the section;

[0011] The new energy section load rate is calculated based on the new energy transmission power in the section and the new energy section limit.

[0012] As a preferred solution, the mathematical expression for obtaining the new energy section limit is as follows:

[0013]

[0014] In the formula, Lim t.m.D It represents the fixed active power limit of section m at time t on D operation day, Lim t.m.D-1 Indicates that the fixed active power limit of section m at time t on D-1 operating day is used on D operating day, Lim t.m.new It indicates that the fixed active power limit of section m is updated at time t on the D operating day.

[0015] As a preferred solution, the mathematical expression for obtaining the load forecast value within the section and calculating the total load forecast demand within the section is as follows:

[0016]

[0017] Where: L t.m It represents the total load forecast demand of section m at time t, I m represents the total load number of section m, p t.i.m It represents the predicted power demand of load i in section m at time t.

[0018] As a preferred solution, the mathematical expression for obtaining the predicted power generation value within the section and calculating the predicted total power generation within the section is as follows:

[0019] Q t.m =F t.m +N t.m +W t.m

[0020] In the formula, Q t.m represents the total predicted power generation of section m at time t, F t.m N represents the predicted total output of the thermal power unit in section m at time t, t.m W represents the predicted total output of the new energy generating units in section m at time t, t.m It represents the total predicted output of other energy sources in section m at time t.

[0021] As a preferred solution, the total predicted output of the thermal power unit in section m at time t is F t.m Calculate as follows:

[0022]

[0023] In the formula, J m represents the total number of thermal power units in section m, f t.j.m It represents the predicted output value of thermal power unit j in section m at time t.

[0024] As a preferred solution, the total output N of the new energy units in section m at time t is predicted t.m Calculate as follows:

[0025]

[0026] Where, X m Indicates the total number of renewable energy units in section m, n t.x.m It represents the predicted output value of the new energy unit x in section m at time t.

[0027] As a preferred solution, the total predicted output of other energy sources at section m at time t is W t.m Calculate as follows:

[0028]

[0029] Where Y m represents the total number of other energy units in section m, e t.y.m It represents the predicted output value of other energy sources y in section m at time t.

[0030] As a preferred solution, the mathematical expression for calculating the new energy output power in the section based on the total predicted load demand in the section and the total predicted power generation in the section is as follows:

[0031] P t.m =Q t.m -L t.m

[0032] Where P t.m represents the renewable energy output power of section m at time t, Q t.m represents the total predicted power generation of section m at time t, L t.m Represents the total load forecast demand of section m at time t.

[0033] As a preferred solution, the mathematical expression for the new energy section load rate calculated based on the new energy output power in the section and the new energy section limit is as follows:

[0034] v t.m =P t.m / Lim t.m ×100%

[0035] In the formula, v t.m P represents the new energy section load rate of section m at time t, t.m represents the renewable energy output power of section m at time t, Lim t.m Represents the new energy section limit of section m at time t.

[0036] In a second aspect, a section load rate calculation system considering the uncertainty of new energy is provided, comprising:

[0037] Section limit acquisition module, used to obtain new energy section limit;

[0038] The load forecast demand total amount calculation module is used to obtain the load forecast value within the section and calculate the load forecast demand total amount within the section;

[0039] The total power generation forecast calculation module is used to obtain the power generation forecast value within the section and calculate the total power generation forecast within the section;

[0040] The new energy output power calculation module is used to calculate the new energy output power in the section according to the total load demand forecast in the section and the total power generation forecast in the section;

[0041] The new energy section load rate calculation module is used to calculate the new energy section load rate based on the new energy output power in the section and the new energy section limit.

[0042] As a preferred solution, the predicted total power generation calculation module calculates the predicted total power generation in the section according to the following formula:

[0043] Q t.m =F t.m +N t.m +W t.m

[0044] In the formula, Q t.m represents the total predicted power generation of section m at time t, F t.m N represents the predicted total output of the thermal power unit in section m at time t, t.m W represents the predicted total output of the new energy generating units in section m at time t, t.m It represents the total predicted output of other energy sources in section m at time t.

[0045] As a preferred solution, the new energy delivery power calculation module calculates the mathematical expression of the new energy delivery power in the section according to the total load forecast demand in the section and the total power generation forecast in the section as follows:

[0046] P t.m =Q t.m -L t.m

[0047] Where P t.m represents the renewable energy output power of section m at time t, Q t.m represents the total predicted power generation of section m at time t, L t.m Represents the total load forecast demand of section m at time t.

[0048] In a third aspect, an electronic device is provided, comprising a processor and a memory, wherein the processor is used to execute a computer program stored in the memory to implement the method for calculating the section load rate taking into account the uncertainty of new energy.

[0049] In a fourth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores at least one instruction, and when the at least one instruction is executed by a processor, the section load rate calculation method considering the uncertainty of new energy is implemented.

[0050] Compared with the prior art, the first aspect of the present invention has at least the following beneficial effects:

[0051] The new energy section limit refers to the fixed active power limit formed due to reasons such as the thermal stability limit of the power grid equipment. The present invention obtains the operating new energy section limit, and calculates the new energy section load rate according to the new energy delivery power in the section and the new energy section limit, wherein the new energy delivery power in the section is calculated according to the total load forecast demand in the section and the total power generation forecast in the section, the total load forecast demand in the section is calculated according to the load forecast value in the section, and the total power generation forecast in the section is calculated according to the power generation forecast value in the section. The present invention enhances the flexibility and regulation ability of the power system through real-time full network balance, and ensures the stability and reliability of power supply. When the new energy section load rate calculated by the present invention reaches the section safety limit, the corresponding market is started, and the market operation agency (generally the dispatching center and the trading center) announces the market bidding space curve and other market opening information on the bidding day on the operation day, effectively promoting the realization of new energy consumption and reducing social energy costs.

[0052] It can be understood that the beneficial effects of the second to fourth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0054] Figure 1 Flow chart of a method for calculating section load rate considering uncertainty of new energy sources according to an embodiment of the present invention;

[0055] Figure 2 A structural block diagram of a section load rate calculation system considering the uncertainty of new energy sources according to an embodiment of the present invention. DETAILED DESCRIPTION

[0056] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0057] At present, the consumption of new energy is facing many challenges, among which the insufficient transmission capacity of sections caused by the growth rate of installed capacity far exceeding the speed of grid construction is a major problem. With the continuous and rapid growth of the scale of new energy installed capacity, the installed capacity of renewable energy such as wind power and photovoltaic power has continued to rise. However, the speed of grid construction and upgrading has not kept pace with the growth rate of new energy installed capacity. This leads to the problem of insufficient transmission capacity of the grid when facing large-scale new energy grid connection, which in turn affects the consumption of new energy. Due to the thermal stability limit of grid equipment, the active power limit of the centralized transmission channel of new energy is limited. When the output of new energy power generation exceeds this limit, the grid equipment may be damaged due to overheating, thus affecting the transmission of new energy. The structure and layout of the grid may also constrain the transmission capacity of new energy. For example, some key nodes or lines in the grid may have capacity bottlenecks, resulting in the inability to smoothly transmit new energy. When the output of new energy power generation exceeds the transmission capacity of the grid, some new energy power will not be able to be transmitted and absorbed, resulting in the phenomenon of wind and solar abandonment. This not only wastes new energy resources, but also affects the investment returns of new energy power generation projects. The volatility and intermittency of renewable energy power generation have posed greater challenges to the safe and stable operation of the power grid. When the proportion of renewable energy installed capacity is too high and the power grid's transmission capacity is insufficient, the operational stability of the power grid may be affected, and even cause power grid failures. In order to improve the power grid's transmission capacity, it is necessary to speed up the construction and upgrading of the power grid. This includes increasing the capacity of power grid equipment, optimizing the layout of the power grid structure, and improving the level of intelligence of the power grid. While the scale of renewable energy installed capacity continues to expand, it is necessary to focus on the coordinated development of renewable energy and the power grid.

[0058] See also Figure 1 In order to improve the utilization efficiency and absorption capacity of new energy, stimulate the enthusiasm of the demand side to absorb new energy, and promote the healthy development of the new energy industry, the cross-section load rate calculation method considering the uncertainty of new energy in the embodiment of the present invention includes:

[0059] Get the new energy section limit;

[0060] Obtain the load forecast value within the section and calculate the total load forecast demand within the section;

[0061] Obtain the predicted power generation value within the section and calculate the predicted total power generation within the section;

[0062] The power output of renewable energy in the section is calculated based on the total predicted load demand and the total predicted power generation in the section;

[0063] The new energy section load rate is calculated based on the new energy transmission power in the section and the new energy section limit.

[0064] In an embodiment of the present invention, the new energy section limit refers to a fixed active power limit formed due to reasons such as the thermal stability limit of the power grid equipment. The fixed active power limit usually refers to the maximum allowable value of active power set for a specific link or equipment in the power system. This limit is to ensure that the power system operates under safe and stable conditions, prevent equipment overload or damage, and ensure the reliability and economy of the power grid. In the power system, active power refers to the power that actually does work, which is an important indicator for measuring the energy conversion efficiency of equipment or power grid. The setting of the fixed active power limit is usually based on the rated capacity, heat dissipation performance, load demand, and stability and reliability requirements of the equipment. Further, the rated capacity of the equipment is the maximum power it can withstand when it is designed. The upper limit of the active power usually cannot exceed the rated capacity of the equipment, otherwise it may cause safety risks such as overheating, damage, and even fire of the equipment. The heat dissipation performance of the equipment will also affect the upper limit of its active power. If the equipment has poor heat dissipation, excessive active power may cause the equipment temperature to rise, thereby causing a fault. The lower limit of the active power is related to load demand and stable operation. In actual applications, if the active power carried by the equipment is too low, it may cause voltage fluctuations, equipment failure to work properly and other problems. In the power system, the setting of fixed active power limits also needs to consider the stability and reliability requirements of the power grid. If the active power of a certain device is too large, it may have an adverse effect on the stability of the power grid and even cause power grid failure. When setting fixed active power limits, it is necessary to comprehensively consider the above factors and make reasonable adjustments based on actual conditions. At the same time, it is also necessary to establish a complete monitoring and control mechanism to monitor the active power of the equipment in real time, and make adjustments or take measures to protect the safe operation of the equipment and the power grid when necessary. Fixed active power limits are an important factor in ensuring the safety, stable operation and reliability of equipment in the power system. By reasonably setting and managing fixed active power limits, the utilization rate of equipment can be effectively improved and its service life can be extended, while reducing the operating risks and costs of the power system.

[0065] In a possible implementation, the mathematical expression for obtaining the new energy section limit is as follows:

[0066]

[0067] In the formula, Lim t.m.D It represents the fixed active power limit of section m at time t on D operation day, Lim t.m.D-1 Indicates that the fixed active power limit of section m at time t on D-1 operating day is used on D operating day, Lim t.m.new It indicates that the fixed active power limit of section m is updated at time t on the D operating day.

[0068] The mathematical expression for obtaining the load forecast value within the section and calculating the total load forecast demand within the section is as follows:

[0069]

[0070] Where: L t.m It represents the total load forecast demand of section m at time t, I m represents the total load number of section m, p t.i.m It represents the predicted power demand of load i in section m at time t.

[0071] The mathematical expression for obtaining the predicted power generation value within the section and calculating the total predicted power generation within the section is as follows:

[0072] Q t.m =F t.m +N t.m +W t.m

[0073] In the formula, Q t.m represents the total predicted power generation of section m at time t, F t.m N represents the predicted total output of the thermal power unit in section m at time t, t.m W represents the predicted total output of the new energy units in section m at time t, t.m It represents the total predicted output of other energy sources in section m at time t.

[0074] Furthermore, the predicted total output of the thermal power unit at section m at time t is F t.m Calculate as follows:

[0075]

[0076] In the formula, J m represents the total number of thermal power units in section m, f t.j.m It represents the predicted output value of thermal power unit j in section m at time t.

[0077] The predicted total output N of the new energy units in section m at time t t.m Calculate as follows:

[0078]

[0079] Where, X m Indicates the total number of new energy units in section m, n t.x.m It represents the predicted output value of the new energy unit x in section m at time t.

[0080] The predicted total output of other energy sources at section m at time t is W t.m Calculate as follows:

[0081]

[0082] Where Ym represents the total number of other energy units in section m, w t.y.m It represents the predicted output value of other energy sources y in section m at time t.

[0083] In a possible implementation, the mathematical expression of the new energy output power in the section is calculated based on the total load demand forecast in the section and the total power generation forecast in the section as follows:

[0084] P t.m =Q t.m -L t.m

[0085] Where P t.m represents the renewable energy output power of section m at time t, Q t.m represents the total predicted power generation of section m at time t, L t.m Represents the total load forecast demand of section m at time t.

[0086] In a possible implementation, the mathematical expression of the new energy section load rate is calculated based on the new energy output power in the section and the new energy section limit as follows:

[0087] v t.m =P t.m / Lim t.m ×100%

[0088] In the formula, v t.m P represents the new energy section load rate of section m at time t, t.m represents the renewable energy output power of section m at time t, Lim t.m Represents the new energy section limit of section m at time t.

[0089] The embodiment of the present invention calculates the power output of new energy in the section based on the total predicted load demand and the total predicted power generation in the section, further calculates the load rate of the new energy section, and issues a market start signal accordingly. Under the current situation of the industry where new energy is vigorously developed, market-oriented means are used to promote the consumption of new energy and support the high-quality development of new energy.

[0090] See also Figure 2 Another embodiment of the present invention further provides a section load rate calculation system considering the uncertainty of new energy sources, comprising:

[0091] Section limit acquisition module, used to obtain new energy section limit;

[0092] The load forecast demand total amount calculation module is used to obtain the load forecast value within the section and calculate the load forecast demand total amount within the section;

[0093] The total power generation forecast calculation module is used to obtain the power generation forecast value within the section and calculate the total power generation forecast within the section;

[0094] The new energy output power calculation module is used to calculate the new energy output power in the section according to the total load demand forecast in the section and the total power generation forecast in the section;

[0095] The new energy section load rate calculation module is used to calculate the new energy section load rate based on the new energy output power in the section and the new energy section limit.

[0096] In a possible implementation manner, the mathematical expression for obtaining the new energy section limit value by the section limit value acquisition module is as follows:

[0097]

[0098] In the formula, Lim t.m.D It represents the fixed active power limit of section m at time t on D operation day, Lim t.m.D-1 Indicates that the fixed active power limit of section m at time t on D-1 operating day is used on D operating day, Lim t.m.new It indicates that the fixed active power limit of section m is updated at time t on the D operating day.

[0099] In a possible implementation, the load forecast demand total amount calculation module obtains the load forecast value within the section, and calculates the mathematical expression of the load forecast demand total amount within the section as follows:

[0100]

[0101] Where: L t.m It represents the total load forecast demand of section m at time t, I m represents the total load number of section m, p t.i.m It represents the predicted power demand of load i in section m at time t.

[0102] In a possible implementation manner, the predicted total power generation calculation module calculates the predicted total power generation within the section according to the following formula:

[0103] Q t.m =F t.m +N t.m +W t.m

[0104] In the formula, Q t.m represents the total predicted power generation of section m at time t, F t.m N represents the predicted total output of the thermal power unit in section m at time t, t.m W represents the predicted total output of the new energy generating units in section m at time t, t.mIt represents the total predicted output of other energy sources in section m at time t.

[0105] Furthermore, the predicted total output of the thermal power unit at section m at time t is F t.m Calculate as follows:

[0106]

[0107] In the formula, J m represents the total number of thermal power units in section m, f t.j.m It represents the predicted output value of thermal power unit j in section m at time t.

[0108] Furthermore, the predicted total output N of the new energy units in section m at time t is t.m Calculate as follows:

[0109]

[0110] Where, X m Indicates the total number of renewable energy units in section m, n t.x.m It represents the predicted output value of the new energy unit x in section m at time t.

[0111] Furthermore, the total predicted output of other energy sources at section m at time t is W t.m Calculate as follows:

[0112]

[0113] Where Y m represents the total number of other energy units in section m, w t.y.m It represents the predicted output value of other energy sources y in section m at time t.

[0114] In a possible implementation, the new energy delivery power calculation module calculates the new energy delivery power in the section according to the total load forecast demand in the section and the total power generation forecast in the section, and obtains the following mathematical expression:

[0115] P t.m =Q t.m -L t.m

[0116] Where P t.m represents the renewable energy output power of section m at time t, Q t.m represents the total predicted power generation of section m at time t, L t.m Represents the total load forecast demand of section m at time t.

[0117] In a possible implementation manner, the new energy section load rate calculation module calculates the new energy section load rate according to the new energy output power in the section and the new energy section limit value to obtain the following mathematical expression:

[0118] v t.m =P t.m / Lim t.m ×100%

[0119] In the formula, v t.m P represents the new energy section load rate of section m at time t, t.m represents the renewable energy output power of section m at time t, Lim t.m Represents the new energy section limit of section m at time t.

[0120] The embodiment of the present invention takes into account the uncertainty of new energy in the section load rate calculation system. According to the calculated new energy section load rate, when it is determined that the new energy section load rate reaches the section safety limit, the corresponding market is started, and the market operation organization (including the dispatching center and the trading center) announces the market opening information such as the market bidding space curve on the bidding day on the operation day.

[0121] The key condition for launching the corresponding market is that the load rate of the new energy section reaches the section safety limit. This condition ensures the safe and stable operation of new energy power generation in the power grid, and also provides a basis for the orderly development of the market.

[0122] The dispatch center is responsible for monitoring the load of the new energy section to ensure that its real-time data is accurate and reliable. When the load rate reaches the safety limit, the market adjustment mechanism is activated in time to ensure the safety of the power grid. According to information such as the market bidding space curve, the output of new energy power generation is adjusted to balance the supply and demand of the power grid.

[0123] The trading center is responsible for publishing market opening information such as the market bidding space curve to ensure that the information is timely and accurate. It organizes new energy power generation companies to participate in market bidding to ensure market fairness and justice. According to the bidding results, it determines the grid-connected electricity price and electricity volume of new energy power generation to ensure the orderly operation of the market.

[0124] The market bidding space curve is one of the important information released by the market operation agency on the operation day. It reflects the bidding space of new energy power generation in different periods. This curve is of great significance for new energy power generation companies to formulate bidding strategies and participate in market competition.

[0125] In the operation process, the market operation agency will announce the market opening information such as the market bidding space curve on the bidding day on the operation day. New energy power generation enterprises formulate bidding strategies based on the market bidding space curve and other information, and submit bidding declarations to the trading center. The trading center conducts bidding matching based on the bidding declarations of new energy power generation enterprises and determines the on-grid electricity price and electricity volume for each time period. The trading center announces the bidding results, including the on-grid electricity price and electricity volume for each time period and the transaction status of new energy power generation enterprises. The dispatching center adjusts the output of new energy power generation according to the bidding results to ensure the balance of supply and demand of the power grid.

[0126] Through the market regulation mechanism, new energy power generation resources can be used more effectively and their consumption ratio in the power grid can be increased. The market bidding mechanism can guide new energy power generation companies to adjust their power generation plans according to market demand and achieve optimal allocation of resources. By real-time monitoring and adjusting the load of new energy sections, the operation risk of the power grid can be reduced and the safe and stable operation of the power grid can be ensured. The orderly development of the market can provide more development opportunities and space for new energy power generation companies and promote the sustainable and healthy development of the new energy industry.

[0127] The section load rate calculation system of the embodiment of the present invention takes into account the uncertainty of new energy. Based on the total load forecast demand and the total power generation forecast in the section, the new energy delivery power in the section is calculated, and then the section load rate is calculated. Based on this, a market start signal is issued, thereby further promoting the consumption of new energy through market means.

[0128] Electricity consumption refers to the digestion and absorption of electricity generated by power plants. Since electric energy is not easy to store on a large scale, the power generated by power plants and the power consumed by the load end need to achieve real-time dynamic balance in the entire power system. New energy consumption specifically refers to the process of effectively absorbing the power generated by new energy (such as wind energy, solar energy, etc.) and using it to meet electricity demand. New energy consumption is of great significance for promoting the transformation of energy structure and achieving green and low-carbon development. New energy power generation is greatly affected by natural factors such as weather and seasons, and its output power has the characteristics of volatility, intermittency and randomness, which increases the difficulty of new energy consumption. The transmission capacity and dispatching level of the power grid are key factors affecting the consumption of new energy. If the power grid structure is unreasonable or the dispatching capacity is insufficient, the transmission and consumption of new energy power will be restricted. At the same time, the competitive relationship between new energy power and traditional energy power in the market and the imperfection of the price mechanism will also affect the consumption of new energy. The embodiment of the present invention provides a way to promote the consumption of new energy, improve the intelligence level of the dispatching system, realize the precise dispatching and efficient operation of the power system, and better absorb new energy power by optimizing the dispatching strategy.

[0129] Another embodiment of the present invention further provides an electronic device, including a processor and a memory, wherein the processor is used to execute a computer program stored in the memory to implement the section load rate calculation method considering the uncertainty of new energy.

[0130] Another embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores at least one instruction, and when the at least one instruction is executed by a processor, the section load rate calculation method considering the uncertainty of new energy is implemented.

[0131] The computer program includes computer program code, which may be in source code form, object code form, executable file or some intermediate form. The computer-readable storage medium may include: any entity or device, medium, USB flash drive, mobile hard disk, disk, optical disk, computer memory, read-only memory, random access memory, electric carrier signal, telecommunication signal and software distribution medium, etc. that can carry the computer program code. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals. For ease of explanation, the above content only shows the part related to the embodiment of the present invention. For specific technical details not disclosed, please refer to the method part of the embodiment of the present invention. The computer-readable storage medium is non-temporary and can be stored in a storage device formed by various electronic devices, which can realize the execution process recorded in the method of the embodiment of the present invention.

[0132] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0133] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks 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 produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the process in the flowchart. 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.

[0134] 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.

[0135] 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 in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0136] 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 above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for calculating section load rate considering the uncertainty of new energy, characterized in that: include: Get the new energy section limit; Obtain the load forecast value within the section and calculate the total load forecast demand within the section; Obtain the predicted power generation value within the section and calculate the predicted total power generation within the section; The power output of renewable energy in the section is calculated based on the total predicted load demand and the total predicted power generation in the section; The new energy section load rate is calculated based on the new energy transmission power in the section and the new energy section limit.

2. The method for calculating section load rate considering the uncertainty of new energy according to claim 1 is characterized in that: The mathematical expression for obtaining the new energy section limit is as follows: In the formula, Lim t.m.D It represents the fixed active power limit of section m at time t on D operation day, Lim t.m.D-1 Indicates that the fixed active power limit of section m at time t on D-1 operating day is used on D operating day, Lim t.m.new It indicates that the fixed active power limit of section m is updated at time t on the D operating day.

3. The method for calculating section load rate considering uncertainty of new energy according to claim 1 is characterized in that: The mathematical expression for obtaining the load forecast value within the section and calculating the total load forecast demand within the section is as follows: Where: L t.m It represents the total load forecast demand of section m at time t, I m represents the total load number of section m, p t.i.m It represents the predicted power demand of load i in section m at time t.

4. The method for calculating section load rate considering uncertainty of new energy according to claim 1 is characterized in that: The mathematical expression for obtaining the predicted power generation value within the section and calculating the predicted total power generation within the section is as follows: Q t.m =F t.m +N t.m +W t.m In the formula, Q t.m represents the total predicted power generation of section m at time t, F t.m N represents the predicted total output of the thermal power unit in section m at time t, t.m W represents the predicted total output of the new energy units in section m at time t, t.m It represents the total predicted output of other energy sources in section m at time t.

5. The method for calculating section load rate considering uncertainty of new energy according to claim 4 is characterized in that: The predicted total output of the thermal power unit in section m at time t is F t.m Calculate as follows: In the formula, J m represents the total number of thermal power units in section m, f t.j.m It represents the predicted output value of thermal power unit j in section m at time t.

6. The method for calculating section load rate considering uncertainty of new energy sources according to claim 4 is characterized in that: The predicted total output N of the new energy units in section m at time t t.m Calculate as follows: Where, X m Indicates the total number of new energy units in section m, n t.x.m It represents the predicted output value of the new energy unit x in section m at time t.

7. The method for calculating section load rate considering uncertainty of new energy according to claim 4 is characterized in that: The predicted total output of other energy sources at section m at time t is W t.m Calculate as follows: Where Y m represents the total number of other energy units in section m, w t.y.m It represents the predicted output value of other energy sources y in section m at time t.

8. The method for calculating section load rate considering uncertainty of new energy sources according to claim 1 is characterized in that: The mathematical expression for calculating the new energy output power in the section based on the total predicted load demand in the section and the total predicted power generation in the section is as follows: P t.m =Q t.m -L t.m Where P t.m represents the renewable energy output power of section m at time t, Q t.m represents the predicted total power generation of section m at time t, L t.m Represents the total load forecast demand of section m at time t.

9. The method for calculating section load rate considering uncertainty of new energy according to claim 8 is characterized in that: The mathematical expression of the new energy section load rate calculated based on the new energy transmission power in the section and the new energy section limit is as follows: v t.m =P t.m / Lim t.m ×100% In the formula, v t.m P represents the new energy section load rate of section m at time t, t.m represents the renewable energy output power of section m at time t, Lim t.m Represents the new energy section limit of section m at time t.

10. A section load rate calculation system considering the uncertainty of new energy, characterized in that: include: Section limit acquisition module, used to obtain new energy section limit; The load forecast demand total amount calculation module is used to obtain the load forecast value within the section and calculate the load forecast demand total amount within the section; The total power generation forecast calculation module is used to obtain the power generation forecast value within the section and calculate the total power generation forecast within the section; The new energy output power calculation module is used to calculate the new energy output power in the section according to the total load demand forecast in the section and the total power generation forecast in the section; The new energy section load rate calculation module is used to calculate the new energy section load rate based on the new energy output power in the section and the new energy section limit.

11. The cross-section load rate calculation system considering the uncertainty of new energy according to claim 10, characterized in that: The predicted total power generation calculation module calculates the predicted total power generation in the section according to the following formula: Q t.m =F t.m +N t.m +W t.m In the formula, Q t.m represents the total predicted power generation of section m at time t, F t.m N represents the predicted total output of the thermal power unit in section m at time t, t.m W represents the predicted total output of the new energy units in section m at time t, t.m It represents the total predicted output of other energy sources in section m at time t.

12. The cross-section load rate calculation system considering the uncertainty of new energy according to claim 10, characterized in that: The new energy delivery power calculation module calculates the mathematical expression of the new energy delivery power in the section according to the total load forecast demand in the section and the total power generation forecast in the section as follows: P t.m =Q t.m -L t.m Where P t.m represents the renewable energy output power of section m at time t, Q t.m represents the predicted total power generation of section m at time t, L t.m Represents the total load forecast demand of section m at time t.

13. An electronic device, characterized in that: It comprises a processor and a memory, wherein the processor is used to execute a computer program stored in the memory to implement a section load rate calculation method considering the uncertainty of new energy as claimed in any one of claims 1 to 9.

14. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores at least one instruction, and when the at least one instruction is executed by a processor, the method for calculating the section load rate considering the uncertainty of new energy as described in any one of claims 1 to 9 is implemented.

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