Coal-fired power plant load scheduling method, device, equipment and medium

Abstract

The invention provides a coal-fired power plant load scheduling method, device and equipment and a medium, and belongs to the technical field of power plant coincidence scheduling. The method comprises the following steps of: distributing electric quantity according to a preset proportion by acquiring power load of a power grid and generating capacity of a coal-fired power plant; identifying a first power grid with the distributed electric quantity lower than the reference load and a second power grid with the distributed electric quantity higher than the actual load, and calculating the to-be-compensated electric quantity of the first power grid and the to-be-abandoned electric quantity of the second power grid. And if the to-be-compensated electric quantity of the first power grid is smaller than the to-be-abandoned electric quantity of the second power grid, the former is compensated by the latter, and the residual difference value is stored in the energy storage system as to-be-stored electric quantity. According to the invention, by optimizing the distribution of the generating capacity of the coal-fired power plant, balancing the load of the power grid, reducing the transmission loss, improving the economic benefit and enhancing the flexibility of the system, the utilization of renewable energy sources is effectively promoted, and the overall operation efficiency of the power system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power station load dispatching, and in particular to a coal-fired power plant load dispatching method, a coal-fired power plant load dispatching device, an electronic device and a computer-readable storage medium. Background Art

[0002] With the continuous growth of global energy demand and the increasing requirements for environmental protection, the sustainable development of the power industry has become the focus of attention of all countries. In my country, coal-fired power plants are the main source of power supply, and their operating efficiency and energy utilization are directly related to the country's energy security and environmental protection. Therefore, how to improve the load dispatching capacity of coal-fired power plants and achieve the optimal allocation of power resources has become an urgent problem to be solved in the power industry.

[0003] At present, the existing load dispatching technology of coal-fired power plants is mainly based on the fixed ratio allocation principle of the power grid, and the power generation of coal-fired power plants is allocated to various power grids through a pre-set allocation ratio.

[0004] However, the existing load dispatching technology for coal-fired power plants has the following problems: (1) The existing load dispatching method fails to fully consider the actual power demand and power supply quality of each power grid, resulting in irrational allocation of power resources. (2) Due to the limitations of the dispatching strategy, the power generation of coal-fired power plants cannot be effectively adjusted according to the real-time changes in the power grid load, resulting in low power grid operation efficiency; (3) The application of energy storage systems in the power system is rarely considered, resulting in the failure to give full play to the regulatory role of the energy storage system and the inability to effectively improve the flexibility of the power system.

[0005] In general, the existing load dispatching technology for coal-fired power plants ignores the actual needs of the power grid, has strategy limitations, and insufficient application of energy storage systems, resulting in unreasonable allocation of power resources, low operating efficiency, and poor system flexibility. Summary of the invention

[0006] The purpose of the embodiments of the present invention is to provide a method, device, equipment and medium for load scheduling in a coal-fired power plant to solve the above-mentioned problems.

[0007] In order to achieve the above object, an embodiment of the present invention provides a method for load scheduling of a coal-fired power plant, comprising: Obtain actual and benchmark electricity loads for multiple power grids, as well as the power generation of coal-fired power plants; Allocate the power generated by coal-fired power plants according to the preset power distribution ratio of each power grid, and determine the allocated power of each power grid; Determine the power grid whose distributed power is less than the reference power load as the first power grid, and determine the power grid whose distributed power is greater than the actual power load as the second power grid; Calculate the sum of the differences between the allocated power of each first power grid and the reference power load to determine the power to be compensated of the first power grid, and calculate the sum of the differences between the allocated power of each second power grid and the actual power load to determine the power to be abandoned of the second power grid; When the amount of electricity to be compensated in the first power grid is less than the amount of electricity to be abandoned in the second power grid, the amount of electricity to be abandoned in the second power grid is used to distribute electricity to each first power grid according to the difference between the allocated electricity of each first power grid and the benchmark electricity load; The difference between the amount of electricity to be abandoned in the second power grid and the amount of electricity to be compensated in the first power grid is calculated, the amount of electricity to be stored is determined, and the amount of electricity to be stored is stored in the energy storage system.

[0008] Optionally, the coal-fired power plant load dispatching method further includes: When the amount of electricity to be compensated of the first power grid is greater than the amount of electricity to be abandoned of the second power grid, the difference between the amount of electricity to be compensated of the first power grid and the amount of electricity to be abandoned of the second power grid is calculated to determine the amount of electricity to be compensated; wherein the amount of electricity to be compensated is provided by the energy storage system; The power to be compensated and the power to be abandoned of the second power grid are used to distribute the power to each first power grid according to the difference between the distributed power of each first power grid and the reference power load.

[0009] Alternatively, the electricity generated by a coal-fired power plant is calculated as follows: Obtaining the weight of blended coal, the energy content of blended coal, the conversion efficiency of the coal-fired power plant, and the conversion factor of the coal-fired power plant; The following formula is used to calculate the weight of blended coal, the energy content of blended coal, the conversion efficiency of the coal-fired power plant and the conversion coefficient of the coal-fired power plant to obtain the power generation of the coal-fired power plant; ;in, represents the electricity generated by coal-fired power plants, Indicates the weight of coal added, Indicates the energy content of the blended coal, represents the conversion efficiency of coal-fired power plants, Represents the conversion factor for coal-fired power plants.

[0010] Optionally, the preset power distribution ratio is calculated by: Obtain electricity prices and frequencies from multiple power grids; The power consumption price and frequency of each power grid are weighted and summed to obtain the power supply dispatch value of each power grid; The ratio of the power supply dispatch value of each power grid to the sum of the power supply dispatch values ​​of each power grid is calculated to determine the preset power supply allocation ratio of each power grid.

[0011] Optionally, a weighted sum is performed on the electricity price and frequency of each power grid to obtain the power supply dispatch value of each power grid, including: For each grid; The following formula is used to calculate the power price and frequency of the power grid to obtain the power supply dispatch value of the power grid; ;in, The power supply dispatch value of the power grid, represents the electricity price of the power grid, Indicates the frequency of the power grid.

[0012] Optionally, the coal-fired power plant load dispatching method further includes: Determine the power grid whose distributed electricity is greater than the reference electricity load and less than the actual electricity load as the third power grid; Calculate the ratio of the number of third power grids to the number of multiple power grids to determine the efficiency of electricity distribution of coal-fired power plants; Obtain boiler combustion efficiency and power generation efficiency of coal-fired power plants; The performance score of the coal-fired power plant is obtained by taking a weighted sum of the boiler combustion efficiency, power generation efficiency and power distribution efficiency of the coal-fired power plant.

[0013] In a second aspect of an embodiment of the present invention, a load dispatching device for a coal-fired power plant is provided, comprising: A data acquisition module, used to acquire actual power load and benchmark power load of multiple power grids, and power generation of coal-fired power plants; The power distribution module is used to distribute the power generation of the coal-fired power plant according to the preset power distribution ratio of each power grid and determine the distributed power of each power grid; A state identification module, used to determine a power grid whose distributed power is less than a reference power load as a first power grid, and to determine a power grid whose distributed power is greater than an actual power load as a second power grid; The power calculation module is used to calculate the sum of the difference between the allocated power of each first power grid and the reference power load, determine the power to be compensated of the first power grid, and calculate the sum of the difference between the allocated power of each second power grid and the actual power load, determine the power to be abandoned of the second power grid; A compensation allocation module, configured to allocate the amount of electricity to be abandoned by the second power grid to each first power grid according to the difference between the allocated amount of each first power grid and the benchmark power load, when the amount of electricity to be compensated by the first power grid is less than the amount of electricity to be abandoned by the second power grid; The power storage module is used to calculate the difference between the power to be abandoned in the second power grid and the power to be compensated in the first power grid, determine the power to be stored, and store the power to be stored in the energy storage system.

[0014] Optionally, the power distribution module is specifically used for: Obtain electricity prices and transmission losses from multiple power grids; The power consumption price and efficiency of each power grid are weighted and summed to obtain the power supply dispatch value of each power grid; The ratio of the power supply dispatch value of each power grid to the sum of the power supply dispatch values ​​of each power grid is calculated to determine the preset power supply allocation ratio of each power grid.

[0015] In a third aspect of the embodiments of the present invention, an electronic device is provided, including: a processor and a memory, wherein the memory stores machine-readable instructions executable by the processor, and when the machine-readable instructions are executed by the processor, the above-mentioned coal-fired power plant load scheduling method is executed.

[0016] In a fourth aspect of the embodiments of the present invention, a computer-readable storage medium is provided, storing computer instructions, which, when executed on a computer, enable the computer to execute the above-mentioned coal-fired power plant load scheduling method.

[0017] Beneficial effects of the present invention: (1) Improving the operating efficiency of the power system: By rationally allocating the power generation of coal-fired power plants, we can ensure that power resources are used effectively and reduce unnecessary power generation and power waste.

[0018] (2) Optimizing grid load balance: This method can identify and process the differences in electricity demand among different grids. By managing compensation and abandoned electricity, it achieves load balance among grids and improves grid stability and reliability.

[0019] (3) Reducing transmission losses: By calculating the preset power supply allocation ratio, the power grid’s electricity price and transmission losses are taken into account, which helps to optimize the power transmission path and method, thereby reducing transmission losses.

[0020] (4) Improving economic benefits: This method can optimize the power supply allocation ratio to better match power resources in terms of price and demand, thereby improving the economic benefits of the power system.

[0021] (5) Enhance the flexibility of the power system: The application of energy storage systems makes the power system more flexible in dealing with load fluctuations and emergencies, and can quickly respond to changes in power demand of the power grid.

[0022] (6) Promoting the utilization of renewable energy: Through the application of energy storage systems, this method helps to increase the access and utilization of renewable energy, because energy storage systems can store excess power generation for use when needed.

[0023] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings: Figure 1 It is a flow chart of a method for load dispatching a coal-fired power plant provided by an embodiment of the present invention; Figure 2 is a schematic diagram of the system architecture of a coal-fired power plant provided by an embodiment of the present invention; Figure 3 It is a structural schematic diagram of a coal-fired power plant load dispatching device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0027] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0028] Embodiment 1 Please refer to Figure 1 , Figure 1 : is a flow chart of a method for load dispatching a coal-fired power plant provided by an embodiment of the present invention, the method comprising the following steps: S100, obtaining actual power loads and benchmark power loads of multiple power grids, and power generation of coal-fired power plants; It should be noted that the execution subject of the load dispatching method for coal-fired power plants provided in the embodiment of the present invention is the load forecasting system. Among them, the load forecasting system belongs to the subsystem of the coal-fired power plant, and the coal-fired power plant includes, in addition to the load forecasting system, the following: the whole plant load decision-making and dispatching system, the load forecasting system, the main and auxiliary machine fault warning system, the power generation automatic control system, the steam turbine automatic control system, the boiler automatic control system, the coal automatic loading and unloading, the collection and testing, the coal transportation automatic device and control system, the laboratory instrument automatic verification and calibration system, the water production, the condensate water treatment automatic device and control system, the ash and slag automatic processing and control system, the desulfurization, denitrification, dust removal automatic control system, the wastewater recovery and automatic processing system, the whole plant unmanned inspection system, the whole plant automatic safety monitoring system, the whole plant automatic remote monitoring system, the coal-fired power station automatic logistics and warehousing system.

[0029] Plant-wide load decision-making and dispatching system: collects information from the plant's intelligent equipment through intelligent servers, implements intelligent management, integrates, displays, makes decisions and controls information, outputs daily load plans, and issues material and production dispatching instructions for the entire plant.

[0030] Load forecasting system: Combined with the short-term load forecast data of the power grid, weather forecasts, and historical electricity consumption big data, the factory load forecast for the next 24 hours is used as a reference for production planning.

[0031] Main and auxiliary machine fault early warning system: By combining the mechanism model and the big data model, early warning of faults is provided for the main and auxiliary machines of the coal-fired unit.

[0032] Fully automatic power generation control system: Automatically control the unit load, match the load demand of the power grid with the output of the turbine and boiler, and realize automatic power generation control.

[0033] Steam turbine full-automatic control system: while responding to the coordinated control of the boiler, the steam turbine and the auxiliary equipment on the turbine side are automatically adjusted throughout the process, so that the adjustment quality meets the requirements of the unit.

[0034] Boiler automatic control system: realize unmanned automatic control of coal burning, air supply and induced draft, ensure combustion stability and automatic control quality of steam pressure, furnace pressure, oxygen content and air supply volume Automatic coal loading and unloading, sampling and testing, coal transportation automatic equipment and control system: the whole process of coal entering the factory, loading and unloading, sampling and testing, coal sorting in the coal yard, and fuel transportation is fully automated.

[0035] Laboratory instrument automatic verification and calibration system: automatic verification and calibration of chemical instruments, thermal instruments, and electrical measuring instruments in power plants to achieve unmanned operation.

[0036] Automatic device and control system for water production and condensate treatment: automatic control of the whole process of water production and condensate polishing.

[0037] Automatic ash and slag processing and control system: automatically process the fly ash and slag produced after coal powder combustion.

[0038] Fully automatic control system for desulfurization, denitrification and dust removal: automatically processes and removes sulfides, nitrogen oxides and dust in flue gas.

[0039] Wastewater recovery and automatic treatment system: Automatically recover, treat and control wastewater generated during coal-fired power generation.

[0040] Unmanned inspection system for the entire plant: It realizes automatic inspection of on-site equipment and data acquisition, replaces on-site inspection personnel, and automatically alarms for equipment abnormalities.

[0041] Automatic safety monitoring system for the whole plant: realize automatic safety protection, and automatically alarm for abnormal situations such as illegal intrusion by personnel, animal invasion, illegal behavior by personnel, fire, etc. Automatic remote monitoring system for the whole plant: Transmit the production, safety, work tickets, alarm and other information of the whole plant to PAD or mobile terminal to obtain remote control information Automatic logistics and warehousing system for coal-fired power plants: realizes the process of automatic receipt, warehousing, outbound and outbound delivery of materials throughout the plant.

[0042] The actual power load of the power grid refers to the total amount of electric energy actually consumed by all electrical equipment connected to the power system within a specific period of time.

[0043] The benchmark power load of the power grid refers to a reference load level set in the planning and operation of the power system to ensure the stable operation of the power grid and the reliability of power supply. This load level is usually the minimum load demand that the power grid should continuously meet under normal circumstances.

[0044] In one embodiment, the power generation of a coal-fired power plant is calculated as follows: S110, obtaining the weight of blended coal, the energy content of blended coal, the conversion efficiency of the coal-fired power plant, and the conversion coefficient of the coal-fired power plant; The weight of coal added refers to the weight of coal added to the furnace.

[0045] The energy content of blended coal refers to the energy content of the coal added to the furnace.

[0046] The conversion efficiency of a coal-fired power plant refers to the efficiency of a coal-fired power plant in converting the chemical energy of the fuel into electrical energy. Usually, this efficiency is affected by many factors, including the type of fuel, the design of the power plant, and the way it operates.

[0047] The conversion factor of a coal-fired power plant is a measure used to convert different types of energy (such as coal, natural gas, biomass, etc.) into the equivalent value of standard coal. The conversion factor is different for each energy source.

[0048] S120, using the following formula, calculating the weight of the blended coal, the energy content of the blended coal, the conversion efficiency of the coal-fired power plant, and the conversion coefficient of the coal-fired power plant to obtain the power generation of the coal-fired power plant; ;in, represents the electricity generated by coal-fired power plants, Indicates the weight of coal added, Indicates the energy content of the blended coal, represents the conversion efficiency of coal-fired power plants, Represents the conversion factor for coal-fired power plants.

[0049] S200, allocating the power generation of the coal-fired power plant according to the preset power distribution ratio of each power grid, and determining the distributed power of each power grid; In one embodiment, the preset power distribution ratio is calculated by: S210, obtaining electricity prices and frequencies of multiple power grids; The electricity price of the power grid refers to the price paid by electricity users for using electricity.

[0050] The frequency of the power grid refers to the number of cyclic repetitions of the alternating current in the power system, usually measured in Hertz (Hz). This frequency indicates the number of cyclic changes in the current per second.

[0051] S220, performing weighted summation of the electricity price and frequency of each power grid to obtain a power supply dispatch value of each power grid; Specifically, step S220 includes: For each power grid: Use the following formula to calculate the power price and frequency of the power grid to obtain the power supply dispatch value of the power grid; ;in, The power supply dispatch value of the power grid, represents the electricity price of the power grid, Indicates the frequency of the power grid.

[0052] It is understandable that the weight value of the electricity price of the power grid and the weight value of the frequency of the power grid may not only be 60% and 40%, but may also be other weight values.

[0053] S230, calculating the ratio of the power supply dispatch value of each power grid to the sum of the power supply dispatch values ​​of each power grid, and determining the preset power supply distribution ratio of each power grid.

[0054] Specifically, the sum of the power supply dispatching values ​​of each power grid is first calculated, and then the ratio of the power supply dispatching value of each power grid to the sum is calculated to obtain the preset power supply allocation ratio of each power grid.

[0055] S300, determining a power grid whose allocated power is less than a reference power load as a first power grid, and determining a power grid whose allocated power is greater than an actual power load as a second power grid; It is understandable that step S300 is to screen out power grids that exceed the actual power load or are lower than the benchmark power load. Because both types of power grids have unreasonable distribution problems, we need to optimize the distribution of their electricity. The optimization distribution process is shown in steps S400 to S800.

[0056] S400, calculating the sum of the difference between the allocated power of each first power grid and the reference power load, determining the power to be compensated of the first power grid, and calculating the sum of the difference between the allocated power of each second power grid and the actual power load, determining the power to be abandoned of the second power grid; The amount of electricity to be compensated of the first power grid refers to the sum of the differences between the distributed electricity of all first power grids and the benchmark electricity load.

[0057] The amount of electricity to be abandoned in the second power grid refers to the sum of the differences between the allocated electricity of all second power grids and the actual electricity load.

[0058] S500, when the amount of electricity to be compensated of the first power grid is less than the amount of electricity to be abandoned of the second power grid, using the amount of electricity to be abandoned of the second power grid, allocating the electricity to be abandoned to each first power grid according to the difference between the allocated electricity of each first power grid and the benchmark electricity load; S600, calculating the difference between the amount of electricity to be abandoned in the second power grid and the amount of electricity to be compensated in the first power grid, determining the amount of electricity to be stored, and storing the amount of electricity to be stored in the energy storage system.

[0059] Steps S500 to S600 describe the distribution of electricity when the amount of electricity to be compensated in the first power grid is less than the amount of electricity to be abandoned in the second power grid. Another situation is described below: S700, when the amount of electricity to be compensated of the first power grid is greater than the amount of electricity to be abandoned of the second power grid, calculating the difference between the amount of electricity to be compensated of the first power grid and the amount of electricity to be abandoned of the second power grid, and determining the amount of electricity to be compensated; wherein the amount of electricity to be compensated is provided by the energy storage system; The amount of electricity to be compensated refers to the amount of electricity that needs to be compensated by all first power grids, which can meet the benchmark electricity load after compensation.

[0060] S800, using the power to be compensated and the power to be abandoned of the second power grid, distribute the power to each first power grid according to the difference between the distributed power of each first power grid and the reference power load.

[0061] For ease of understanding, steps S400 to S800 are described below by way of example: Assume that the first and second power grids have 3 each: First Grid (Grid A): A1's allocated electricity: 200MWh, base electricity load: 250MWh A2's allocated electricity: 300MWh, base electricity load: 280MWh A3's allocated electricity: 250MWh, base load: 220MWh Second Grid (Grid B): B1's allocated electricity: 150MWh, actual electricity load: 100MWh B2's allocated electricity: 200MWh, actual electricity load: 220MWh B3's allocated electricity: 250MWh, actual electricity load: 300MWh Step 1 (calculate the amount of electricity to be compensated and the amount of electricity to be abandoned): The amount of electricity to be compensated by the first power grid: Difference for A1: 200-250=-50MWh A2 difference: 250-280=-30MWh A3 difference: 210-220-10MWh Total electricity to be compensated = -50-30-10 = -90MWh The amount of electricity to be abandoned in the second power grid: Difference for B1: 150-100=50MWh Difference for B2: 220-200=20MWh Difference for B3: 300-250=50MWh Total power to be abandoned = 50 + 20 + 50 = 120 MWh Step 2 (Judgment of the difference between the amount of electricity to be compensated and the amount of electricity to be abandoned) Since the total amount of electricity to be compensated in the first power grid is -90MWh, and the total amount of electricity to be abandoned in the second power grid is 120MWh, that is, the total amount of electricity to be compensated in the first power grid is less than the total amount of electricity to be abandoned in the second power grid, we directly calculate the difference between the amount of electricity to be abandoned in the second power grid and the amount of electricity to be compensated in the first power grid, and calculate that the amount of electricity to be stored is 30MWh, which means that the second power grid still has 30MWh left after compensating and allocating it to the first power grid, and this 30MWh needs to be stored in the energy storage system.

[0062] Step 3 (power optimization distribution): The first grid needs an additional 90MWh of electricity, which is directly provided by the second grid. The second grid has 120MWh of electricity to be abandoned. After allocating 90MWh to the first grid, there is still 30MWh left, which needs to be stored in the energy storage system.

[0063] In one or more of the above embodiments, the coal-fired power plant load scheduling method further includes: Determine the power grid whose distributed electricity is greater than the reference electricity load and less than the actual electricity load as the third power grid; Calculate the ratio of the number of third power grids to the number of multiple power grids to determine the efficiency of electricity distribution of coal-fired power plants; Obtain boiler combustion efficiency and power generation efficiency of coal-fired power plants; The performance score of the coal-fired power plant is obtained by taking a weighted sum of the boiler combustion efficiency, power generation efficiency and power distribution efficiency of the coal-fired power plant.

[0064] Beneficial effects of the present invention: (1) Improving the operating efficiency of the power system: By rationally allocating the power generation of coal-fired power plants, we can ensure that power resources are used effectively and reduce unnecessary power generation and power waste.

[0065] (2) Optimizing grid load balance: This method can identify and process the differences in electricity demand among different grids. By managing compensation and abandoned electricity, it achieves load balance among grids and improves grid stability and reliability.

[0066] (3) Reducing transmission losses: By calculating the preset power supply allocation ratio, the power grid’s electricity price and transmission losses are taken into account, which helps to optimize the power transmission path and method, thereby reducing transmission losses.

[0067] (4) Improving economic benefits: This method can optimize the power supply allocation ratio to better match power resources in terms of price and demand, thereby improving the economic benefits of the power system.

[0068] (5) Enhance the flexibility of the power system: The application of energy storage systems makes the power system more flexible in dealing with load fluctuations and emergencies, and can quickly respond to changes in power demand of the power grid.

[0069] (6) Promoting the utilization of renewable energy: Through the application of energy storage systems, this method helps to increase the access and utilization of renewable energy, because energy storage systems can store excess power generation for use when needed.

[0070] Embodiment 2 Based on the same inventive concept, Figure 3 As shown, the embodiment of the present invention further provides a coal-fired power plant load dispatching device 200, comprising: The data acquisition module 210 is used to acquire the actual power load and the benchmark power load of multiple power grids, and the power generation of coal-fired power plants; The power distribution module 220 is used to distribute the power generation of the coal-fired power plant according to the preset power distribution ratio of each power grid, and determine the distributed power of each power grid; The state identification module 230 is used to determine that the power grid whose distributed power is less than the reference power load is the first power grid, and to determine that the power grid whose distributed power is greater than the actual power load is the second power grid; The power calculation module 240 is used to calculate the sum of the difference between the allocated power of each first power grid and the reference power load, determine the power to be compensated of the first power grid, and calculate the sum of the difference between the allocated power of each second power grid and the actual power load, determine the power to be abandoned of the second power grid; The compensation allocation module 250 is used to allocate the power to be abandoned of each first power grid according to the difference between the allocated power of each first power grid and the benchmark power load by using the power to be abandoned of the second power grid when the power to be compensated of the first power grid is less than the power to be abandoned of the second power grid; The power storage module 260 is used to calculate the difference between the power to be abandoned in the second power grid and the power to be compensated in the first power grid, determine the power to be stored, and store the power to be stored in the energy storage system.

[0071] Optionally, the power distribution module 220 is specifically used for: Obtain electricity prices and transmission losses from multiple power grids; The power consumption price and transmission loss of each power grid are weighted and summed to obtain the power supply dispatch value of each power grid; The ratio of the power supply dispatch value of each power grid to the sum of the power supply dispatch values ​​of each power grid is calculated to determine the preset power supply allocation ratio of each power grid.

[0072] It should be understood that the device corresponds to the above-mentioned coal-fired power plant load scheduling method embodiment, and can execute the various steps involved in the above-mentioned method embodiment. The specific functions of the device can be found in the description above. To avoid repetition, the detailed description is appropriately omitted here. The device includes at least one software function module that can be stored in a memory in the form of software or firmware or solidified in the operating system (OS) of the device.

[0073] Embodiment 3 Based on the same inventive concept, an embodiment of the present invention also provides an electronic device, including: a processor and a memory, the memory storing machine-readable instructions executable by the processor, and the machine-readable instructions executing the above-mentioned coal-fired power plant load scheduling method when executed by the processor.

[0074] In a typical configuration, an electronic device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0075] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0076] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0077] Embodiment 4 Based on the same inventive concept, a computer-readable storage medium stores computer instructions. When the computer instructions are executed on a computer, the computer executes the above-mentioned coal-fired power plant load scheduling method.

[0078] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0079] 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.

[0080] 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.

[0081] 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 The steps for the functions specified in one or more boxes.

[0082] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0083] In addition, the functional modules in each embodiment of the present application can be integrated together to form an independent part, or each module can exist separately, or two or more modules can be integrated to form an independent part.

[0084] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0085] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A method for load dispatching of a coal-fired power plant, characterized in that: include: Obtain actual and benchmark electricity loads for multiple power grids, as well as the power generation of coal-fired power plants; Allocate the power generated by coal-fired power plants according to the preset power distribution ratio of each power grid, and determine the allocated power of each power grid; Determine the power grid whose distributed power is less than the reference power load as the first power grid, and determine the power grid whose distributed power is greater than the actual power load as the second power grid; Calculate the sum of the differences between the allocated power of each first power grid and the benchmark power load to determine the power to be compensated of the first power grid, and calculate the sum of the differences between the allocated power of each second power grid and the actual power load to determine the power to be abandoned of the second power grid; When the amount of electricity to be compensated in the first power grid is less than the amount of electricity to be abandoned in the second power grid, the amount of electricity to be abandoned in the second power grid is used to distribute electricity to each first power grid according to the difference between the allocated electricity of each first power grid and the benchmark electricity load; The difference between the amount of electricity to be abandoned in the second power grid and the amount of electricity to be compensated in the first power grid is calculated, the amount of electricity to be stored is determined, and the amount of electricity to be stored is stored in the energy storage system.

2. The method for load dispatching of a coal-fired power plant according to claim 1, characterized in that: The method further comprises: When the amount of electricity to be compensated of the first power grid is greater than the amount of electricity to be abandoned of the second power grid, the difference between the amount of electricity to be compensated of the first power grid and the amount of electricity to be abandoned of the second power grid is calculated to determine the amount of electricity to be compensated; wherein the amount of electricity to be compensated is provided by the energy storage system; The power to be compensated and the power to be abandoned of the second power grid are used to distribute the power to each first power grid according to the difference between the distributed power of each first power grid and the reference power load.

3. The method for load dispatching of a coal-fired power plant according to claim 1, characterized in that: The electricity generated by a coal-fired power plant is calculated as follows: Obtaining the weight of blended coal, the energy content of blended coal, the conversion efficiency of the coal-fired power plant, and the conversion factor of the coal-fired power plant; The following formula is used to calculate the weight of blended coal, the energy content of blended coal, the conversion efficiency of the coal-fired power plant and the conversion coefficient of the coal-fired power plant to obtain the power generation of the coal-fired power plant; ;in, represents the electricity generated by coal-fired power plants, Indicates the weight of coal added, Indicates the energy content of the blended coal, represents the conversion efficiency of coal-fired power plants, Represents the conversion factor for coal-fired power plants.

4. The method for load dispatching of a coal-fired power plant according to claim 1, characterized in that: The preset power distribution ratio is calculated as follows: Obtain electricity prices and frequencies from multiple power grids; The power consumption price and frequency of each power grid are weighted and summed to obtain the power supply dispatch value of each power grid; The ratio of the power supply dispatch value of each power grid to the sum of the power supply dispatch values ​​of each power grid is calculated to determine the preset power supply allocation ratio of each power grid.

5. The method for load dispatching of a coal-fired power plant according to claim 1, characterized in that: The power consumption price and frequency of each power grid are weighted and summed to obtain the power supply dispatch value of each power grid, including: For each grid; The following formula is used to calculate the power price and frequency of the power grid to obtain the power supply dispatch value of the power grid; ;in, The power supply dispatch value of the power grid, represents the electricity price of the power grid, Indicates the frequency of the power grid.

6. The method for load dispatching of a coal-fired power plant according to claim 1, characterized in that: The method further comprises: Determine the power grid whose distributed electricity is greater than the reference electricity load and less than the actual electricity load as the third power grid; Calculate the ratio of the number of third power grids to the number of multiple power grids to determine the efficiency of electricity distribution of coal-fired power plants; Obtain boiler combustion efficiency and power generation efficiency of coal-fired power plants; The performance score of the coal-fired power plant is obtained by taking a weighted sum of the boiler combustion efficiency, power generation efficiency and power distribution efficiency of the coal-fired power plant.

7. A load dispatching device for a coal-fired power plant, characterized in that: include: A data acquisition module, used to acquire actual power load and benchmark power load of multiple power grids, and power generation of coal-fired power plants; The power distribution module is used to distribute the power generation of the coal-fired power plant according to the preset power distribution ratio of each power grid and determine the distributed power of each power grid; A state identification module, used to determine a power grid whose distributed power is less than a reference power load as a first power grid, and to determine a power grid whose distributed power is greater than an actual power load as a second power grid; The power calculation module is used to calculate the sum of the difference between the allocated power of each first power grid and the reference power load, determine the power to be compensated of the first power grid, and calculate the sum of the difference between the allocated power of each second power grid and the actual power load, determine the power to be abandoned of the second power grid; A compensation allocation module, configured to allocate the amount of electricity to be abandoned by the second power grid to each first power grid according to the difference between the allocated amount of each first power grid and the benchmark power load, when the amount of electricity to be compensated by the first power grid is less than the amount of electricity to be abandoned by the second power grid; The power storage module is used to calculate the difference between the power to be abandoned in the second power grid and the power to be compensated in the first power grid, determine the power to be stored, and store the power to be stored in the energy storage system.

8. The load dispatching device for a coal-fired power plant according to claim 7, characterized in that: The power distribution module is specifically used for: Obtain electricity prices and transmission losses from multiple power grids; The power consumption price and efficiency of each power grid are weighted and summed to obtain the power supply dispatch value of each power grid; The ratio of the power supply dispatch value of each power grid to the sum of the power supply dispatch values ​​of each power grid is calculated to determine the preset power supply allocation ratio of each power grid.

9. An electronic device, characterized in that: include: A processor and a memory, wherein the memory stores machine-readable instructions executable by the processor, and when the machine-readable instructions are executed by the processor, the coal-fired power plant load scheduling method described in any one of claims 1-6 is executed.

10. A computer-readable storage medium storing computer instructions, characterized in that: When the computer instructions are executed on a computer, the computer is enabled to execute the coal-fired power plant load dispatching method described in any one of claims 1 to 6.

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