Method and device for determining energy consumption in peak regulation process of coal-fired unit

Abstract

This application provides a method and apparatus for determining energy consumption during peak shaving of a coal-fired power unit, belonging to the field of automatic control technology for coal-fired power plants. The method includes: acquiring operating parameters of the coal-fired power unit under peak shaving conditions; inputting the operating parameters into a variable operating condition calculation model of the coal-fired power unit to obtain the basic coal consumption rate during operation; determining the basic peak shaving energy consumption during operation based on the electrical load of the coal-fired power unit and the basic coal consumption rate; determining the additional coal consumption rate during operation based on the operating parameters and the basic coal consumption rate; determining the additional peak shaving energy consumption during operation based on the electrical load of the coal-fired power unit and the additional coal consumption rate; and determining the total energy consumption during peak shaving based on the basic peak shaving energy consumption and the additional peak shaving energy consumption. This method realizes the calculation of basic and additional energy consumption during the operation of a coal-fired power unit.

Description

Technical Field

[0001] This application relates to the field of automatic control technology for coal-fired power plants, specifically to a method for determining energy consumption during peak shaving of coal-fired units, a device for determining energy consumption during peak shaving of coal-fired units, a machine-readable storage medium, and a processor. Background Technology

[0002] With the rapid development of renewable energy power generation technology, wind and solar power, among other renewable energy sources, have been connected to the grid on a large scale. However, due to the intermittent and fluctuating nature of renewable energy generation, this large-scale grid connection exacerbates grid fluctuations, making it difficult to absorb renewable energy. Therefore, the peak-shaving capacity of coal-fired power units is receiving increasing attention. During frequent peak-shaving operations, coal-fired power units experience additional dynamic energy consumption due to rapid load fluctuations, reducing the thermal economy of power generation.

[0003] However, current energy consumption analysis methods for coal-fired power units mainly focus on the steady-state operation of the units. There are no mature methods for analyzing the energy consumption characteristics of the units during load changes, and there is no clear calculation method for the additional energy consumption generated by coal-fired power units during peak shaving. How to conduct economic evaluation of coal-fired power units during the dynamic process of peak shaving has become a research goal for those skilled in the art. Summary of the Invention

[0004] The purpose of this application is to provide a method and apparatus for determining energy consumption during peak shaving of coal-fired power units, which is used to calculate energy consumption during load changes of coal-fired power units.

[0005] To achieve the above objectives, the first aspect of this application provides a method for determining energy consumption during peak shaving in coal-fired power units, comprising:

[0006] Obtain operating parameters of coal-fired power units under peak-shaving conditions;

[0007] The operating parameters are input into the variable operating condition calculation model of the coal-fired unit to obtain the basic coal consumption rate during the operation of the coal-fired unit.

[0008] Based on the electrical load of the coal-fired unit and the basic coal consumption rate, the peak-shaving basic energy consumption during the operation of the coal-fired unit is determined.

[0009] Based on the operating parameters and the basic coal consumption rate, the additional coal consumption rate during the operation of the coal-fired unit is determined;

[0010] Based on the electrical load of the coal-fired unit and the additional coal consumption rate, the peak-shaving additional energy consumption during the operation of the coal-fired unit is determined.

[0011] The total energy consumption of coal-fired power units during peak shaving is determined based on the basic peak shaving energy consumption and the additional peak shaving energy consumption.

[0012] In this embodiment of the application, the operating parameters include: the electrical load of the coal-fired unit, the main steam temperature on the turbine side, the main steam pressure on the turbine side, the reheat steam temperature on the turbine side, the desuperheating water flow rate of the reheat steam on the turbine side, and the condenser pressure.

[0013] In this embodiment of the application, the basic coal consumption rate during the operation of the coal-fired unit is calculated according to formula (1):

[0014] b0=f(P e ,T 1,d ,p 1,d ,T 2,d D sp,d ,p c,d (1);

[0015] In the formula, b0 represents the basic coal consumption rate; f represents the calculation method of the standard coal consumption rate by the variable operating condition calculation model; P e T1 represents the electrical load of the coal-fired unit, in kW; P1 represents the main steam temperature on the turbine side, in °C; P1 represents the main steam pressure on the turbine side, in MPa; T2 represents the reheat steam temperature on the turbine side, in °C; D sp This indicates the flow rate of reheat steam desuperheating spray water, in °C; p c This indicates the condenser pressure, in kPa; the subscript d indicates the power generation capacity P. e The corresponding operating condition design parameter values.

[0016] In this embodiment of the application, the peak-shaving baseline energy consumption during the operation of the coal-fired power unit is determined based on the electrical load of the coal-fired power unit and the baseline coal consumption rate, including:

[0017] According to formula (2), calculate the peak-shaving basic energy consumption during the operation of the coal-fired unit:

[0018]

[0019] In the formula, t1 and t2 represent the start and end times of the calculation process; P e b0 represents the electrical load of the coal-fired unit, in kW; b0 represents the basic coal consumption rate of the coal-fired unit under the corresponding load, in g kWh. -1 .

[0020] In this embodiment of the application, the peak-shaving baseline energy consumption during the operation of the coal-fired power unit is determined based on the electrical load of the coal-fired power unit and the baseline coal consumption rate, including:

[0021] According to formula (3), calculate the peak-shaving basic energy consumption during the operation of the coal-fired unit:

[0022]

[0023] In the formula, P e1 Indicates the initial electrical load of the coal-fired unit; P e2 Indicates the termination of electrical load for coal-fired power units; P e b0 represents the electrical load of the coal-fired unit, in kW; b0 represents the basic coal consumption rate, in g kWh. -1 .

[0024] In this embodiment of the application, the additional coal consumption rate includes the additional coal consumption rate of the boiler-turbine coordination control system, the additional coal consumption rate of the reheat steam temperature control system, and the additional coal consumption rate of the cold end system.

[0025] The determination of peak-shaving additional energy consumption during the operation of coal-fired power units based on the electrical load of the coal-fired power units and the additional coal consumption rate includes:

[0026] The additional energy consumption of the boiler-turbine coordination control system is determined based on the electrical load of the coal-fired unit and the additional coal consumption rate of the boiler-turbine coordination control system.

[0027] The additional energy consumption of the reheat steam temperature control system is determined based on the electrical load of the coal-fired unit and the additional coal consumption rate of the reheat steam temperature control system.

[0028] The additional energy consumption of the cold end system is determined based on the electrical load of the coal-fired unit and the additional coal consumption rate of the cold end system.

[0029] Based on the additional energy consumption of the boiler-turbine coordinated control system, the additional energy consumption of the reheat steam temperature control system, and the additional energy consumption of the cold end system, the peak-shaving additional energy consumption during the operation of the coal-fired unit is determined.

[0030] In this embodiment of the application, according to formula (9), the additional energy consumption of the computer-controlled furnace coordination system is:

[0031]

[0032] In the formula, P e The unit represents the electrical load of the coal-fired unit, in kW; Δb1 represents the additional coal consumption rate caused by the boiler-turbine coordination control system, in g kWh. -1 t1 and t2 represent the start and end times of the calculation process.

[0033] Calculate the additional energy consumption of the reheat steam temperature control system according to formula (10):

[0034]

[0035] In the formula, P e Δb2 represents the electrical load of the coal-fired unit, in kW; Δb2 represents the additional coal consumption rate caused by the reheat steam temperature control system, in g kWh. -1t1 and t2 represent the start and end times of the calculation process.

[0036] Calculate the additional energy consumption of the cold-end system according to formula (11):

[0037]

[0038] In the formula, P e Δb3 represents the electrical load of the coal-fired unit, in kW; Δb3 represents the additional coal consumption rate caused by the cold end system, in g kWh. -1 t1 and t2 represent the start and end times of the calculation process.

[0039] A second aspect of this application provides an energy consumption determination device during peak shaving of a coal-fired power unit, comprising:

[0040] The operating parameter acquisition module is used to acquire operating parameters of coal-fired power units under peak-shaving conditions.

[0041] The basic coal consumption rate calculation module is used to input the operating parameters into the coal-fired unit variable operating condition calculation model to obtain the basic coal consumption rate during the operation of the coal-fired unit.

[0042] The peak-shaving basic energy consumption calculation module is used to determine the peak-shaving basic energy consumption during the operation of the coal-fired unit based on the electrical load of the coal-fired unit and the basic coal consumption rate.

[0043] The additional coal consumption rate calculation module is used to determine the additional coal consumption rate during the operation of the coal-fired unit based on the operating parameters and the basic coal consumption rate.

[0044] The peak-shaving additional energy consumption calculation module is used to determine the peak-shaving additional energy consumption during the operation of the coal-fired unit based on the electrical load of the coal-fired unit and the additional coal consumption rate.

[0045] The total energy consumption calculation module is used to determine the total energy consumption of the coal-fired unit during the peak shaving process based on the basic peak shaving energy consumption and the additional peak shaving energy consumption.

[0046] A third aspect of this application provides a processor configured to execute the energy consumption determination method described above during the peak shaving process of a coal-fired power unit.

[0047] A fourth aspect of this application provides a machine-readable storage medium storing instructions that, when executed by a processor, configure the processor to perform the aforementioned energy consumption determination method during peak shaving of a coal-fired power unit.

[0048] Compared with the prior art, the above-mentioned technical solution of the present invention has the following beneficial effects:

[0049] This application provides a method and apparatus for determining energy consumption during peak shaving of coal-fired power units. The method calculates the basic energy consumption and additional energy consumption during the operation of coal-fired power units, which can intuitively represent the operating level of the unit in the transient process and provide a certain reference for operation optimization.

[0050] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0051] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. In the drawings:

[0052] Figure 1 This illustration schematically shows an application environment diagram of the energy consumption determination method in the peak shaving process of a coal-fired power unit according to an embodiment of this application;

[0053] Figure 2 The schematic diagram illustrates a flow chart of a method for determining energy consumption during peak shaving of a coal-fired power unit according to an embodiment of this application;

[0054] Figure 3 A schematic diagram of the system structure according to an embodiment of this application is shown;

[0055] Figure 4 A schematic diagram illustrating the power variation of a coal-fired unit according to an embodiment of this application is shown.

[0056] Figure 5 This illustration schematically shows a graph illustrating the real-time standard coal consumption rate variation of a coal-fired power unit according to an embodiment of this application.

[0057] Figure 6 This schematic diagram illustrates the structural block diagram of an energy consumption determination device during peak shaving of a coal-fired power unit according to an embodiment of this application;

[0058] Figure 7 The diagram illustrates the internal structure of a computer device according to an embodiment of this application. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of the embodiments of this application and are not intended to limit the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0060] It should be noted that if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0061] The energy consumption determination method for peak shaving processes in coal-fired power units provided in this application can be applied to, for example... Figure 1 In the application environment shown, terminal 102 communicates with server 104 via a network. Terminal 102 can be, but is not limited to, various personal computers, laptops, smartphones, tablets, and portable wearable devices, and server 104 can be a standalone server or a server cluster consisting of multiple servers.

[0062] Figure 2 This illustration schematically shows a flowchart of a method for determining energy consumption during peak shaving in a coal-fired power unit according to an embodiment of this application. Figure 2 As shown, in one embodiment of this application, a method for determining energy consumption during peak shaving of a coal-fired power unit is provided. This embodiment mainly applies this method to the above-mentioned... Figure 1 Taking terminal 102 (or server 104) as an example, the following steps are included:

[0063] Step 110: Obtain the operating parameters of the coal-fired power unit under peak shaving conditions.

[0064] In this embodiment, the operating parameters are data measured during the operation of the coal-fired unit under peak-shaving conditions, including: the electrical load P of the coal-fired unit. e Turbine-side main steam temperature T1, turbine-side main steam pressure p1, turbine-side reheat steam temperature T2, turbine-side reheat steam desuperheating spray flow rate D sp and condenser pressure p c .

[0065] Step 120: Input the operating parameters into the variable operating condition calculation model of the coal-fired unit to obtain the basic coal consumption rate during the operation of the coal-fired unit.

[0066] In this embodiment, a variable operating condition calculation model needs to be established for the coal-fired unit under study. Then, the operating parameters obtained in step 110 are input into the variable operating condition calculation model of the coal-fired unit to calculate the basic coal consumption rate during the operation of the coal-fired unit.

[0067] For example, the basic coal consumption rate during the operation of a coal-fired unit is calculated according to formula (1):

[0068] b0=f(P e ,T 1,d ,p 1,d ,T 2,d D sp,d ,p c,d (1);

[0069] In the formula, b0 represents the basic coal consumption rate; f represents the calculation method of the standard coal consumption rate by the variable operating condition calculation model; P e T1 represents the electrical load of the coal-fired unit, in kW; P1 represents the main steam temperature on the turbine side, in °C; P1 represents the main steam pressure on the turbine side, in MPa; T2 represents the reheat steam temperature on the turbine side, in °C; D sp This indicates the flow rate of reheat steam desuperheating spray water, in °C; p c This indicates the condenser pressure, in kPa; the subscript d indicates the power generation capacity P. e The corresponding operating condition design parameter values.

[0070] In this embodiment, since the thermal systems of each unit are different, a variable operating condition calculation model needs to be established according to the actual situation. In formula (1), f represents the calculation method of standard coal consumption rate by the variable operating condition calculation model, which is a program for coal-fired units.

[0071] Step 130: Based on the electrical load of the coal-fired unit and the basic coal consumption rate, determine the peak-shaving basic energy consumption during the operation of the coal-fired unit.

[0072] In this embodiment, the calculation method for peak-shaving basic energy consumption during the operation of a coal-fired unit is as follows:

[0073]

[0074] In the formula, t1 and t2 represent the start and end times of the calculation process; P e b0 represents the electrical load of the coal-fired unit, in kW; b0 represents the basic coal consumption rate of the coal-fired unit under the corresponding load, in g kWh. -1 For the selected coal-fired unit, b0 is only related to the real-time load. t It is only related to the load variation pattern during operation.

[0075] In this embodiment, if the load changes linearly with time during operation, the calculation method for the peak-shaving basic energy consumption of the coal-fired unit during operation is as follows:

[0076]

[0077] In the formula, P e1 Indicates the initial electrical load of the coal-fired unit; P e2 Indicates the termination of electrical load for coal-fired power units; P e b0 represents the electrical load of the coal-fired unit, in kW; b0 represents the basic coal consumption rate, in g kWh. -1 .

[0078] Step 140: Based on the operating parameters and the basic coal consumption rate, determine the additional coal consumption rate during the operation of the coal-fired unit.

[0079] In this embodiment, the additional coal consumption rate includes the additional coal consumption rate of the boiler-turbine coordination control system, the additional coal consumption rate of the reheat steam temperature control system, and the additional coal consumption rate of the cold end system.

[0080] 1.1 The boiler-turbine coordinated control system mainly controls the unit's power and main steam pressure. The water-to-coal ratio, air-to-coal ratio, superheated steam desuperheating spray, and the regulation of the main steam regulating valve all affect the main steam thermal parameters. The calculation method for the additional coal consumption rate of the boiler-turbine coordinated control system is as follows:

[0081] Δb1=f(P,T 1,r ,p 1,r ,T 2,d D sp,d ,p c,d )-b0 (4);

[0082] 1.2 The reheat steam temperature control system primarily controls the superheat of the reheat steam, mainly through flue gas damper regulation and reheat desuperheating water spraying. Reheat desuperheating water spraying significantly impacts the unit's thermal economy, generating additional energy consumption. The calculation method for the additional coal consumption rate of the reheat steam temperature control system is as follows:

[0083] Δb2=f(P,T 1,d ,p 1,d ,T 2,r D sp,r ,p c,d )-b0 (5);

[0084] 1.3 The cold-end system primarily controls the condenser pressure. Excessive turbine exhaust pressure increases cold source losses, reduces cycle efficiency, and generates additional energy consumption. The calculation method for the additional coal consumption rate of the cold-end system is as follows:

[0085] Δb3=f(P,T 1,d ,p 1,d,T 2,d D sp,d ,p c,r )-b0 (6);

[0086] In the formula, P e represents the electrical load of the coal-fired unit, in kW; f represents the calculation method of the additional coal consumption rate in the variable operating condition calculation model; T1 represents the main steam temperature on the turbine side, in °C; p1 represents the main steam pressure on the turbine side, in MPa; T2 represents the reheat steam temperature on the turbine side, in °C; D sp This indicates the flow rate of reheat steam desuperheating spray water, in °C; p c b0 represents the condenser pressure in kPa; b0 represents the basic coal consumption rate in g kWh. -1 The subscript d represents the design parameter; the subscript r represents the parameter in actual operation.

[0087] Step 150: Based on the electrical load of the coal-fired unit and the additional coal consumption rate, determine the additional energy consumption for peak shaving during the operation of the coal-fired unit.

[0088] The calculation method for peak-shaving additional energy consumption during the operation of coal-fired power units is as follows:

[0089]

[0090] In the formula, Δb represents the additional standard coal consumption rate; P e The t1 and t2 represent the electrical load of the coal-fired unit, in kW; t1 and t2 represent the start and end times of the calculation of the operation process.

[0091] The calculation method for the additional standard coal consumption rate during the operation of a coal-fired power unit is as follows:

[0092] Δb=f(P,T 1,r ,p 1,r ,T 2,r D sp,r ,p c,r )-b0 (8);

[0093] In the formula, the subscript symbol r represents the measured value in actual operation.

[0094] The boiler-turbine coordination control system may cause the main steam pressure or temperature to deviate from the set value; the reheat steam temperature control system may cause the reheat steam temperature to deviate from the set value, and reheat desuperheating water spray will reduce energy consumption; the cold end system may cause the turbine back pressure to be higher than the set value. All of these factors will lead to the unit's energy consumption level exceeding the design operating condition. Therefore, in this embodiment, the additional energy consumption for peak shaving includes: the additional energy consumption of the boiler-turbine coordination control system, the additional energy consumption of the reheat steam temperature control system, and the additional energy consumption of the cold end system.

[0095] According to formula (9), the additional energy consumption of the computer-controlled furnace coordination system is:

[0096]

[0097] In the formula, P e The unit represents the electrical load of the coal-fired unit, in kW; Δb1 represents the additional coal consumption rate caused by the boiler-turbine coordination control system, in g kWh. -1 t1 and t2 represent the start and end times of the calculation process.

[0098] Calculate the additional energy consumption of the reheat steam temperature control system according to formula (10):

[0099]

[0100] In the formula, P e Δb2 represents the electrical load of the coal-fired unit, in kW; Δb2 represents the additional coal consumption rate caused by the reheat steam temperature control system, in g kWh. -1 t1 and t2 represent the start and end times of the calculation process.

[0101] Calculate the additional energy consumption of the cold-end system according to formula (11):

[0102]

[0103] In the formula, P e Δb3 represents the electrical load of the coal-fired unit, in kW; Δb3 represents the additional coal consumption rate caused by the cold end system, in g kWh. -1 t1 and t2 represent the start and end times of the calculation process.

[0104] Step 160: Determine the total energy consumption of the coal-fired unit during the peak shaving process based on the basic peak shaving energy consumption and the additional peak shaving energy consumption.

[0105] In this embodiment, the total energy consumption of the peak-shaving process is divided into basic energy consumption and additional energy consumption:

[0106] b t =b0 t +Δb t (12)

[0107] In the formula, b t This represents the total energy consumption of a coal-fired power unit during operation, converted to standard coal consumption rate, in grams per kWh. -1 b0 t This represents the basic energy consumption during the operation of a coal-fired power unit, expressed in g kWh. -1 ;Δb t This indicates additional energy consumption, measured in grams (g) or kWh. -1This refers to the additional energy consumption caused by deviations in the control of thermal parameters.

[0108] In this embodiment, the thermal efficiency of the coal-fired unit is the "thermal economy". Calculating the total energy consumption of the coal-fired unit during peak shaving is to evaluate the economy. The lower the energy consumption, the better the economy.

[0109] Figure 2 This is a flowchart illustrating a method for determining energy consumption during peak shaving in a coal-fired power unit, as shown in one embodiment. It should be understood that, although... Figure 2 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 2 At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but may be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but may be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0110] In one embodiment, such as Figure 3 As shown, a peak-shaving economic evaluation system for coal-fired power units is provided, including: a basic peak-shaving energy consumption calculation module and a peak-shaving additional energy consumption calculation module, wherein the peak-shaving additional energy consumption calculation module includes: an additional energy consumption calculation module for the boiler-turbine coordinated control system, an additional energy consumption calculation module for the reheat steam temperature control system, and an additional energy consumption calculation module for the cold end system.

[0111] Figure 4 A schematic diagram illustrating the power variation of a coal-fired unit according to an embodiment of this application is provided. Figure 5 A schematic diagram illustrating the real-time standard coal consumption rate variation of a coal-fired power unit according to an embodiment of this application is provided. Figure 5 As shown, this embodiment analyzes the actual operating data of a 660MW coal-fired power unit using the above method. Combining the collected main steam temperature, main steam pressure, and other parameters, the real-time standard coal consumption rate during operation is calculated. This embodiment calculates the base energy consumption of the coal-fired power unit to be 295.92 g kWh during the 6000s operation period using the above method. -1 The total energy consumption is 301.40 g kWh. -1 The additional energy consumption is 5.48g kWh. -1 Analysis of each component shows that the additional energy consumption of the boiler-turbine coordinated control system is 1.37 g kWh. -1 The additional energy consumption of the reheat steam temperature control system is 0.48 g kWh. -1The additional energy consumption of the cold end system is 3.33 g kWh. -1 .

[0112] In one embodiment, such as Figure 6 As shown, an energy consumption determination device for peak shaving in a coal-fired power unit is provided, comprising: an operating parameter acquisition module 210, a basic coal consumption rate calculation module 220, a peak shaving basic energy consumption calculation module 230, an additional coal consumption rate calculation module 240, a peak shaving additional energy consumption calculation module 250, and a total energy consumption calculation module 260, wherein:

[0113] The operating parameter acquisition module 210 is used to acquire the operating parameters of the coal-fired unit under peak shaving conditions.

[0114] The basic coal consumption rate calculation module 220 is used to input the operating parameters into the coal-fired unit variable operating condition calculation model to obtain the basic coal consumption rate during the operation of the coal-fired unit.

[0115] The peak-shaving basic energy consumption calculation module 230 is used to determine the peak-shaving basic energy consumption during the operation of the coal-fired unit based on the electrical load of the coal-fired unit and the basic coal consumption rate.

[0116] Additional coal consumption rate calculation module 240 is used to determine the additional coal consumption rate during the operation of the coal-fired unit based on the operating parameters and the basic coal consumption rate;

[0117] The peak-shaving additional energy consumption calculation module 250 is used to determine the peak-shaving additional energy consumption during the operation of the coal-fired unit based on the electrical load of the coal-fired unit and the additional coal consumption rate.

[0118] The total energy consumption calculation module 260 is used to determine the total energy consumption of the coal-fired unit during the peak shaving process based on the basic peak shaving energy consumption and the additional peak shaving energy consumption.

[0119] The energy consumption determination device during the peak shaving process of the coal-fired unit includes a processor and a memory. The above-mentioned operating parameter acquisition module, basic coal consumption rate calculation module, peak shaving basic energy consumption calculation module, additional coal consumption rate calculation module, peak shaving additional energy consumption calculation module and total energy consumption calculation module are all stored in the memory as program units. The processor executes the above-mentioned program modules stored in the memory to realize the corresponding functions.

[0120] The processor contains a kernel, which retrieves the corresponding program units from memory. One or more kernels can be configured, and adjusting kernel parameters allows for the determination of energy consumption during peak shaving in coal-fired power units.

[0121] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0122] This application provides a storage medium storing a program that, when executed by a processor, implements the energy consumption determination method during the peak shaving process of a coal-fired power unit.

[0123] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 7 As shown in the figure, the computer device includes a processor A01, a network interface A02, a display screen A04, an input device A05, and a memory (not shown) connected via a system bus. The processor A01 provides computing and control capabilities. The memory includes internal memory A03 and a non-volatile storage medium A06. The non-volatile storage medium A06 stores an operating system B01 and a computer program B02. The internal memory A03 provides an environment for the operation of the operating system B01 and the computer program B02 stored in the non-volatile storage medium A06. The network interface A02 is used for communication with external terminals via a network connection. When the computer program is executed by the processor A01, it implements a method for determining energy consumption during peak shaving in a coal-fired power unit. The display screen A04 can be an LCD screen or an e-ink display screen. The input device A05 can be a touch layer covering the display screen, buttons, a trackball, or a touchpad mounted on the computer device casing, or an external keyboard, touchpad, or mouse.

[0124] Those skilled in the art will understand that Figure 7 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0125] In one embodiment, the energy consumption determination device for peak shaving of a coal-fired unit provided in this application can be implemented as a computer program, which can be implemented in the form of, for example... Figure 7 The computer device shown runs on this system. The computer device's memory can store the various program modules that make up the energy consumption determination device in the peak-shaving process of this coal-fired power unit, for example... Figure 6The illustrated modules are: operating parameter acquisition module 210, basic coal consumption rate calculation module 220, peak-shaving basic energy consumption calculation module 230, additional coal consumption rate calculation module 240, peak-shaving additional energy consumption calculation module 250, and total energy consumption calculation module 260. The computer program, comprised of these modules, causes the processor to execute the steps in the energy consumption determination method for the peak-shaving process of a coal-fired unit as described in the various embodiments of this application.

[0126] Figure 7 The computer equipment shown can be used as follows Figure 6 The parameter acquisition module 210 in the energy consumption determination device during the peak shaving process of the coal-fired power unit shown executes step 110. The computer equipment can execute step 120 through the basic coal consumption rate calculation module 220. The computer equipment can execute step 130 through the peak shaving basic energy consumption calculation module 230. The computer equipment can execute step 140 through the additional coal consumption rate calculation module 240. The computer equipment can execute step 150 through the peak shaving additional energy consumption calculation module 250. The computer equipment can execute step 160 through the total energy consumption calculation module 260.

[0127] This application provides a device, which includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs the following steps:

[0128] Step 110: Obtain the operating parameters of the coal-fired power unit under peak shaving conditions.

[0129] Step 120: Input the operating parameters into the variable operating condition calculation model of the coal-fired unit to obtain the basic coal consumption rate during the operation of the coal-fired unit.

[0130] Step 130: Based on the electrical load of the coal-fired unit and the basic coal consumption rate, determine the peak-shaving basic energy consumption during the operation of the coal-fired unit.

[0131] Step 140: Based on the operating parameters and the basic coal consumption rate, determine the additional coal consumption rate during the operation of the coal-fired unit.

[0132] Step 150: Based on the electrical load of the coal-fired unit and the additional coal consumption rate, determine the additional energy consumption for peak shaving during the operation of the coal-fired unit.

[0133] Step 160: Determine the total energy consumption of the coal-fired unit during the peak shaving process based on the basic peak shaving energy consumption and the additional peak shaving energy consumption.

[0134] In one embodiment, the operating parameters include: the electrical load of the coal-fired unit, the main steam temperature on the turbine side, the main steam pressure on the turbine side, the reheat steam temperature on the turbine side, the desuperheating water flow rate of the reheat steam on the turbine side, and the condenser pressure.

[0135] In one embodiment, the basic coal consumption rate during the operation of the coal-fired unit is calculated according to formula (1):

[0136] b0=f(P e ,T 1,d ,p 1,d ,T 2,d D sp,d ,p c,d (1);

[0137] In the formula, b0 represents the basic coal consumption rate; f represents the calculation method of the standard coal consumption rate by the variable operating condition calculation model; P e T1 represents the electrical load of the coal-fired unit, in kW; P1 represents the main steam temperature on the turbine side, in °C; P1 represents the main steam pressure on the turbine side, in MPa; T2 represents the reheat steam temperature on the turbine side, in °C; D sp This indicates the flow rate of reheat steam desuperheating spray water, in °C; p c This indicates the condenser pressure, in kPa; the subscript d indicates the power generation capacity P. e The corresponding operating condition design parameter values.

[0138] In one embodiment, determining the peak-shaving baseline energy consumption during the operation of a coal-fired power unit based on its electrical load and the baseline coal consumption rate includes:

[0139] According to formula (2), calculate the peak-shaving basic energy consumption during the operation of the coal-fired unit:

[0140]

[0141] In the formula, t1 and t2 represent the start and end times of the calculation process; P e b0 represents the electrical load of the coal-fired unit, in kW; b0 represents the basic coal consumption rate of the coal-fired unit under the corresponding load, in g kWh. -1 .

[0142] In one embodiment, determining the peak-shaving baseline energy consumption during the operation of a coal-fired power unit based on its electrical load and the baseline coal consumption rate includes:

[0143] According to formula (3), calculate the peak-shaving basic energy consumption during the operation of the coal-fired unit:

[0144]

[0145] In the formula, P e1 Indicates the initial electrical load of the coal-fired unit; P e2 Indicates the termination of electrical load for coal-fired power units; P e b0 represents the electrical load of the coal-fired unit, in kW; b0 represents the basic coal consumption rate, in g kWh. -1 .

[0146] In one embodiment, the additional coal consumption rate includes the additional coal consumption rate of the boiler-turbine coordination control system, the additional coal consumption rate of the reheat steam temperature control system, and the additional coal consumption rate of the cold end system.

[0147] The determination of peak-shaving additional energy consumption during the operation of coal-fired power units based on the electrical load of the coal-fired power units and the additional coal consumption rate includes:

[0148] The additional energy consumption of the boiler-turbine coordination control system is determined based on the electrical load of the coal-fired unit and the additional coal consumption rate of the boiler-turbine coordination control system.

[0149] The additional energy consumption of the reheat steam temperature control system is determined based on the electrical load of the coal-fired unit and the additional coal consumption rate of the reheat steam temperature control system.

[0150] The additional energy consumption of the cold end system is determined based on the electrical load of the coal-fired unit and the additional coal consumption rate of the cold end system.

[0151] Based on the additional energy consumption of the boiler-turbine coordinated control system, the additional energy consumption of the reheat steam temperature control system, and the additional energy consumption of the cold end system, the peak-shaving additional energy consumption during the operation of the coal-fired unit is determined.

[0152] In one embodiment, the additional energy consumption of the computer-controlled furnace coordination system is calculated according to formula (9):

[0153]

[0154] In the formula, P e The unit represents the electrical load of the coal-fired unit, in kW; Δb1 represents the additional coal consumption rate caused by the boiler-turbine coordination control system, in g kWh. -1 t1 and t2 represent the start and end times of the calculation process.

[0155] Calculate the additional energy consumption of the reheat steam temperature control system according to formula (10):

[0156]

[0157] In the formula, P e Δb2 represents the electrical load of the coal-fired unit, in kW; Δb2 represents the additional coal consumption rate caused by the reheat steam temperature control system, in g kWh. -1 t1 and t2 represent the start and end times of the calculation process.

[0158] Calculate the additional energy consumption of the cold-end system according to formula (11):

[0159]

[0160] In the formula, Pe Δb3 represents the electrical load of the coal-fired unit, in kW; Δb3 represents the additional coal consumption rate caused by the cold end system, in g kWh. -1 t1 and t2 represent the start and end times of the calculation process.

[0161] This application provides a method and apparatus for determining energy consumption during peak shaving of coal-fired power units. The method calculates the basic energy consumption and additional energy consumption during the operation of coal-fired power units, which can intuitively represent the operating level of the unit in the transient process and provide a certain reference for operation optimization.

[0162] This application provides a method and apparatus for determining energy consumption during peak shaving of coal-fired power units. By acquiring real-time operating data of the unit, the operating parameters in the formula are selected and sent to the corresponding calculation module to obtain the basic energy consumption value and additional energy consumption value of the peak shaving process of the coal-fired power unit. The additional energy consumption value is divided into additional energy consumption value of the boiler-turbine coordinated control system, additional energy consumption value of the reheat steam temperature control system, and additional energy consumption value of the cold end system according to the cause of generation. In this way, the economic efficiency of the peak shaving process of the coal-fired power unit is obtained, and the thermal economic analysis of the coal-fired power unit during the variable load process is performed to obtain the energy consumption characteristics of the unit during transient operation, laying a data foundation for tapping the energy-saving potential on the basis of flexible adjustment.

[0163] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied 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.

[0164] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0165] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0166] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0167] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0168] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, like read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0169] Computer-readable media include both permanent and non-permanent, removable and non-removable media, which can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, 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 technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0170] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0171] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for determining energy consumption during peak shaving in a coal-fired power unit, characterized in that, The method includes: Obtain operating parameters of coal-fired power units under peak-shaving conditions; The operating parameters are input into the variable operating condition calculation model of the coal-fired unit to obtain the basic coal consumption rate during the operation of the coal-fired unit. Based on the electrical load of the coal-fired unit and the basic coal consumption rate, the peak-shaving basic energy consumption during the operation of the coal-fired unit is determined. Based on the operating parameters and the basic coal consumption rate, the additional coal consumption rate during the operation of the coal-fired unit is determined; wherein, the additional coal consumption rate includes the additional coal consumption rate of the boiler-turbine coordination control system, the additional coal consumption rate of the reheat steam temperature control system, and the additional coal consumption rate of the cold end system; the determination of the peak-shaving additional energy consumption during the operation of the coal-fired unit based on the electrical load of the coal-fired unit and the additional coal consumption rate includes: Based on the electrical load of the coal-fired unit and the additional coal consumption rate of the boiler-turbine coordination control system, the additional energy consumption of the boiler-turbine coordination control system is determined; wherein, according to formula (9), the additional energy consumption of the boiler-turbine coordination control system is: (9); where Pe represents the electrical load of the coal-fired unit, in kW; b1 represents the additional coal consumption rate caused by the boiler-machine coordinated control system, in g kWh-1; t1 and t2 represent the start and end times of the calculation during operation. Based on the electrical load of the coal-fired unit and the additional coal consumption rate of the reheat steam temperature control system, the additional energy consumption of the reheat steam temperature control system is determined; wherein, according to formula (10), the additional energy consumption of the reheat steam temperature control system is calculated: (10); where Pe represents the electrical load of the coal-fired unit, in kW; b2 represents the additional coal consumption rate caused by the reheat steam temperature control system, in g kWh-1; t1 and t2 represent the start and end times of the calculation during the operation process. Based on the electrical load of the coal-fired unit and the additional coal consumption rate of the cold-end system, the additional energy consumption of the cold-end system is determined; wherein, the additional energy consumption of the cold-end system is calculated according to formula (11): (11); where Pe represents the electrical load of the coal-fired unit, in kW; b3 represents the additional coal consumption rate caused by the cold end system, in g kWh-1; t1 and t2 represent the start and end times of the calculation of the operation process; Based on the additional energy consumption of the boiler-turbine coordinated control system, the additional energy consumption of the reheat steam temperature control system, and the additional energy consumption of the cold end system, the peak-shaving additional energy consumption during the operation of the coal-fired unit is determined. Based on the electrical load of the coal-fired unit and the additional coal consumption rate, the peak-shaving additional energy consumption during the operation of the coal-fired unit is determined. The total energy consumption of coal-fired power units during peak shaving is determined based on the basic peak shaving energy consumption and the additional peak shaving energy consumption.

2. The method according to claim 1, characterized in that, The operating parameters include: the electrical load of the coal-fired unit, the main steam temperature on the turbine side, the main steam pressure on the turbine side, the reheat steam temperature on the turbine side, the reheat steam desuperheating water flow rate on the turbine side, and the condenser pressure.

3. The method according to claim 2, characterized in that, Calculate the basic coal consumption rate during the operation of the coal-fired unit according to formula (1): （1）； In the formula, b 0 represents the basic coal consumption rate; f This describes the calculation method for standard coal consumption rate using a variable operating condition calculation model. P e This indicates the electrical load of the coal-fired power unit, in kW; T 1 indicates the main steam temperature on the turbine side, in °C; p 1 indicates the main steam pressure on the turbine side, in MPa; T 2 indicates the reheat steam temperature on the turbine side, in °C; D sp This indicates the flow rate of the reheat steam desuperheating spray, in °C. p c This indicates condenser pressure, in kPa; the subscript d indicates power generation. P e The corresponding operating condition design parameter values.

4. The method according to claim 3, characterized in that, Based on the electrical load of the coal-fired unit and the aforementioned basic coal consumption rate, the peak-shaving basic energy consumption during the operation of the coal-fired unit is determined, including: According to formula (2), calculate the peak-shaving basic energy consumption during the operation of the coal-fired unit: （2）； In the formula, t 1 and t 2 indicates the start and end times of the calculation process; P e This indicates the electrical load of the coal-fired power unit, in kW; b 0 represents the base coal consumption rate of a coal-fired unit under the corresponding load, in g / kWh. -1 .

5. The method according to claim 3, characterized in that, Based on the electrical load of the coal-fired unit and the aforementioned basic coal consumption rate, the peak-shaving basic energy consumption during the operation of the coal-fired unit is determined, including: According to formula (3), calculate the peak-shaving basic energy consumption during the operation of the coal-fired unit: （3）； In the formula, Indicates the initial electrical load of the coal-fired power unit; This indicates that the electrical load of the coal-fired power unit has been terminated; P e This indicates the electrical load of the coal-fired power unit, in kW; b 0 represents the basic coal consumption rate, in g / kWh. -1 .

6. A device for determining energy consumption during peak shaving in a coal-fired power unit, characterized in that, The device includes: The operating parameter acquisition module is used to acquire operating parameters of coal-fired power units under peak-shaving conditions. The basic coal consumption rate calculation module is used to input the operating parameters into the coal-fired unit variable operating condition calculation model to obtain the basic coal consumption rate during the operation of the coal-fired unit. The peak-shaving basic energy consumption calculation module is used to determine the peak-shaving basic energy consumption during the operation of the coal-fired unit based on the electrical load of the coal-fired unit and the basic coal consumption rate. The additional coal consumption rate calculation module is used to determine the additional coal consumption rate during the operation of the coal-fired unit based on the operating parameters and the basic coal consumption rate; wherein, the additional coal consumption rate includes the additional coal consumption rate of the boiler-turbine coordinated control system, the additional coal consumption rate of the reheat steam temperature control system, and the additional coal consumption rate of the cold end system; the determination of the peak-shaving additional energy consumption during the operation of the coal-fired unit based on the electrical load of the coal-fired unit and the additional coal consumption rate includes: Based on the electrical load of the coal-fired unit and the additional coal consumption rate of the boiler-turbine coordination control system, the additional energy consumption of the boiler-turbine coordination control system is determined; wherein, according to formula (9), the additional energy consumption of the boiler-turbine coordination control system is: (9); where Pe represents the electrical load of the coal-fired unit, in kW; b1 represents the additional coal consumption rate caused by the boiler-machine coordinated control system, in g kWh-1; t1 and t2 represent the start and end times of the calculation during operation. Based on the electrical load of the coal-fired unit and the additional coal consumption rate of the reheat steam temperature control system, the additional energy consumption of the reheat steam temperature control system is determined; wherein, according to formula (10), the additional energy consumption of the reheat steam temperature control system is calculated: (10); where Pe represents the electrical load of the coal-fired unit, in kW; b2 represents the additional coal consumption rate caused by the reheat steam temperature control system, in g kWh-1; t1 and t2 represent the start and end times of the calculation during the operation process. Based on the electrical load of the coal-fired unit and the additional coal consumption rate of the cold-end system, the additional energy consumption of the cold-end system is determined; wherein, the additional energy consumption of the cold-end system is calculated according to formula (11): (11); where Pe represents the electrical load of the coal-fired unit, in kW; b3 represents the additional coal consumption rate caused by the cold end system, in g kWh-1; t1 and t2 represent the start and end times of the calculation of the operation process; Based on the additional energy consumption of the boiler-turbine coordinated control system, the additional energy consumption of the reheat steam temperature control system, and the additional energy consumption of the cold end system, the peak-shaving additional energy consumption during the operation of the coal-fired unit is determined. The peak-shaving additional energy consumption calculation module is used to determine the peak-shaving additional energy consumption during the operation of the coal-fired unit based on the electrical load of the coal-fired unit and the additional coal consumption rate. The total energy consumption calculation module is used to determine the total energy consumption of the coal-fired unit during the peak shaving process based on the basic peak shaving energy consumption and the additional peak shaving energy consumption.

7. A processor, characterized in that, The method is configured to perform the energy consumption determination method during the peak shaving process of a coal-fired power unit according to any one of claims 1 to 5.

8. A machine-readable storage medium storing instructions thereon, characterized in that, When executed by a processor, this instruction causes the processor to be configured to perform the energy consumption determination method in the peak shaving process of a coal-fired power unit according to any one of claims 1 to 5.

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