Method and system for solving electricity utilization carbon emission of electric power system

Abstract

The invention relates to the technical field of power utilization carbon emission factor calculation, and discloses a power utilization carbon emission solving method and system for an electric power system, and the method comprises the steps: building a coal consumption model, a fuel consumption model and a power consumption model of a coal power unit in the start-stop process; the method comprises the following steps: establishing a steady-state coal consumption calculation model of a coal power unit under a rated or non-rated steady-state operation condition through a quadratic function coal consumption equation on the basis of the rated or non-rated steady-state operation condition of the coal power unit, and determining a power generation carbon emission factor model on the basis of the steady-state coal consumption calculation model; the method comprises the following steps: establishing an unsteady-state coal consumption calculation model of the coal power unit under the unsteady-state operation condition of the landslide through a quadratic function coal consumption equation on the basis of the unsteady-state operation condition of the landslide process of the coal power unit, and determining an average power generation carbon emission factor model on the basis of the unsteady-state coal consumption calculation model; and based on the coal consumption model, the oil consumption model, the power consumption model, the power generation carbon emission factor model and the average power generation carbon emission factor model, determining the power utilization carbon emission of the power system.

Description

Technical Field

[0001] This invention relates to the field of electricity carbon emission factor calculation technology, and more specifically, to a method and system for solving the electricity carbon emission of a power system. Background Technology

[0002] The electricity consumption carbon emission factor serves as a crucial basis for calculating the carbon emission levels on the user side of the power system. It enables real-time mapping of the electricity consumption carbon emission levels of power users at different times and in different geographical locations, helping users accurately perceive their own electricity consumption carbon emission levels. Simultaneously, the electricity consumption carbon emission factor also provides relevant power operators with information on the grid's carbon emission levels, further assisting power companies in carbon reduction and emission mitigation, and achieving refined carbon monitoring and carbon reduction optimization of the power system.

[0003] Currently, the mainstream methods for calculating the carbon emission factor of electricity consumption fall into two main categories: one is the statistical accounting method, which calculates the total energy consumption and total power generation of generating units over a period of time, while also calculating the amount of electricity imported into the region. The total carbon emissions corresponding to the imported electricity are obtained by multiplying this by the known average carbon emission factor of the region. The sum of the carbon emissions from generating units and the carbon emissions from imported electricity is then divided by the total load to obtain the regional average carbon emission factor of electricity consumption. This method is simple in principle and highly interpretable, but it has low spatiotemporal resolution and assumes that the carbon emission factor per unit energy generation is consistent for all generating units. The other method, based on carbon emission flow theory, can maintain the same spatiotemporal resolution as power flow calculation data. However, in its application, it directly selects a fixed carbon emission factor for coal-fired power units. While this method solves the problem of low spatiotemporal resolution of the regional average carbon emission factor of electricity consumption, it still suffers from a coarse characterization of the carbon emission intensity of coal-fired power units under different operating conditions. Summary of the Invention

[0004] The present invention provides a method and system for solving the carbon emissions of electricity consumption in a power system, in order to solve the problem of how to solve the carbon emissions of electricity consumption in a power system based on a coal consumption model of multiple operating conditions of coal-fired power plants.

[0005] To address the above problems, this invention provides a method for calculating carbon emissions from electricity consumption in a power system, characterized in that the method includes:

[0006] Establish coal consumption models, oil consumption models, and electricity consumption models for coal-fired power units during start-up and shutdown processes;

[0007] Based on the rated or unrated steady-state operating conditions of coal-fired power units, a steady-state coal consumption calculation model for coal-fired power units under rated or unrated steady-state operating conditions is established through a quadratic function coal consumption equation. Based on the steady-state coal consumption calculation model, a power generation carbon emission factor model is determined.

[0008] Based on the unsteady operating conditions of coal-fired power units climbing landslides, a calculation model for the unsteady coal consumption of coal-fired power units under unsteady operating conditions of climbing landslides is established through a quadratic function coal consumption equation. Based on the calculation model for the unsteady coal consumption, an average power generation carbon emission factor model is determined.

[0009] Based on the aforementioned coal consumption model, oil consumption model, electricity consumption model, power generation carbon emission factor model, and average power generation carbon emission factor model, the carbon emissions from electricity consumption in the power system are determined.

[0010] Preferably, the establishment of coal consumption models, oil consumption models, and electricity consumption models during the start-up and shutdown process of coal-fired power units, wherein the electricity consumption model is as follows:

[0011]

[0012] in, ξ1 represents the power consumption during the startup process of the coal-fired power unit, ξ1 represents the time required for stage I, and p represents the linear energy consumption factor for stage I.

[0013] Based on the aforementioned power consumption model, determine the carbon emissions from electricity consumption in the power system:

[0014]

[0015] in, ε represents the carbon emissions generated by the purchased electricity consumed by coal-fired power units in Phase I. p The carbon dioxide emission factor for electricity purchased from external sources by coal-fired power units;

[0016] In Phase II, coal-fired power units mainly consume coal and fuel oil. The coal consumption model and the fuel oil consumption model are as follows:

[0017]

[0018] in, and These represent the coal consumption and fuel consumption of a coal-fired power unit during startup, respectively. 21 and ξ 22 This represents the pre-start and post-start periods of the ignition-steam pressurization-turbine start-up-generator grid connection phase. 21 and c 22 The linear coal consumption factors before and after the start-up are respectively, o 21 and o 22 These are the linear fuel consumption factors before and after the start-up, respectively.

[0019] Based on the coal consumption model and the oil consumption model, determine the carbon emissions from electricity consumption in the power system:

[0020]

[0021] Where, ε c ε is the carbon emission factor for coal combustion. o Carbon emission factors from fuel combustion;

[0022] Determine the carbon emissions of electricity consumed by the power system during the start-up and shutdown of coal-fired power units:

[0023]

[0024] Preferably, the step of establishing a steady-state coal consumption calculation model for coal-fired power units under rated or unrated steady-state operating conditions based on rated or unrated steady-state operating conditions using a quadratic function coal consumption equation, and determining a power generation carbon emission factor model based on the steady-state coal consumption calculation model, includes:

[0025] Determine the quadratic function coal consumption equation:

[0026]

[0027] in, P is the fuel consumption per unit time of unit output. c For the output of coal-fired power units, a, b, and c are the quadratic coefficient, linear coefficient, and constant term of the fuel consumption characteristics, respectively;

[0028] Under steady-state operation of coal-fired power units, a steady-state coal consumption calculation model is constructed:

[0029]

[0030] Where, r c This refers to the coal consumption rate for power supply under rated or non-rated steady-state operating conditions of a coal-fired power unit. When the unit is operating under rated conditions, the rated coal consumption rate for power supply is as follows:

[0031]

[0032] The carbon emission factor model for coal-fired power units under rated or unrated steady-state operation is as follows:

[0033]

[0034] in, The carbon emission factor for power generation under steady-state operation is the carbon emission of coal-fired power units under rated or unrated steady-state operation.

[0035]

[0036] in, Δt represents the carbon emissions of the coal-fired power unit under steady-state operation, and Δt represents the steady-state operation time of the power unit.

[0037] Preferably, the unsteady-state operating condition based on the landslide climbing process of the coal-fired power unit establishes an unsteady-state coal consumption calculation model for the coal-fired power unit under the unsteady-state operating condition of landslide climbing through a quadratic function coal consumption equation, and determines the average power generation carbon emission factor model based on the unsteady-state coal consumption calculation model, including:

[0038] Under unsteady-state operation of coal-fired power units, an unsteady-state coal consumption calculation model is constructed:

[0039]

[0040] in, This refers to the coal consumption of the coal-fired power unit during the landslide climbing process. This represents the force output at the end of the landslide climb. This represents the force output at the start of the landslide climb. Time spent climbing the landslide;

[0041] The average carbon emission factor model for power generation under unsteady operating conditions is as follows:

[0042]

[0043] in, ε represents the average carbon emission factor of a coal-fired power unit under unsteady operating conditions during landslide climbing. c Carbon emission factors from coal combustion;

[0044] Carbon emissions from coal-fired power units operating under unsteady conditions such as landslide climbing:

[0045]

[0046] Preferably, the method further includes: determining a solution model for the electricity carbon emission factor under different operating conditions based on a steady-state coal consumption calculation model and a non-steady-state coal consumption calculation model; and determining the electricity carbon emission factor vector for each node of the power grid based on the solution model for the electricity carbon emission factor.

[0047]

[0048] Among them, E C Let P be the carbon emission factor vector of electricity consumption at each node of the power grid. N Let P be the active flux matrix of the nodes. This matrix is ​​an N-order diagonal matrix. B P represents the power flow distribution matrix of the line. G E is the generator output vector. G Let T be the carbon emission factor matrix for generator power generation, and T be the matrix transpose.

[0049] According to another aspect of the present invention, the present invention provides a system for solving the carbon emissions of electricity consumption in a power system, characterized in that the system comprises:

[0050] The first establishment unit is used to establish the coal consumption model, oil consumption model and electricity consumption model of the coal-fired power unit during the start-up and shutdown process;

[0051] The second establishment unit is used to establish a steady-state coal consumption calculation model for coal-fired power units under rated or unrated steady-state operating conditions based on rated or unrated steady-state operating conditions of the coal-fired power units through a quadratic function coal consumption equation, and to determine the power generation carbon emission factor model based on the steady-state coal consumption calculation model.

[0052] The third unit is used to establish a non-steady-state coal consumption calculation model for coal-fired power units under the non-steady-state operation condition of climbing landslides based on the non-steady-state operation condition of climbing landslides through a quadratic function coal consumption equation, and to determine the average power generation carbon emission factor model based on the non-steady-state coal consumption calculation model.

[0053] The result unit is used to determine the carbon emissions of electricity consumption in the power system based on the coal consumption model, oil consumption model, electricity consumption model, power generation carbon emission factor model, and average power generation carbon emission factor model.

[0054] Preferably, the first establishing unit is used to establish a coal consumption model, an oil consumption model, and an electricity consumption model for the coal-fired power unit during start-up and shutdown, wherein the electricity consumption model is:

[0055]

[0056] in, ξ1 represents the power consumption during the startup process of the coal-fired power unit, ξ1 represents the time required for stage I, and p represents the linear energy consumption factor for stage I.

[0057] Based on the aforementioned power consumption model, determine the carbon emissions from electricity consumption in the power system:

[0058]

[0059] in, ε represents the carbon emissions generated by the purchased electricity consumed by coal-fired power units in Phase I. p The carbon dioxide emission factor for electricity purchased from external sources by coal-fired power units;

[0060] In Phase II, coal-fired power units mainly consume coal and fuel oil. The coal consumption model and the fuel oil consumption model are as follows:

[0061]

[0062] in, and These represent the coal consumption and fuel consumption of a coal-fired power unit during startup, respectively. 21 and ξ 22This represents the pre-start and post-start periods of the ignition-steam pressurization-turbine start-up-generator grid connection phase. 21 and c 22 The linear coal consumption factors before and after the start-up are respectively, o 21 and o 22 These are the linear fuel consumption factors before and after the start-up, respectively.

[0063] Based on the coal consumption model and the oil consumption model, determine the carbon emissions from electricity consumption in the power system:

[0064]

[0065] Where, ε c ε is the carbon emission factor for coal combustion. o Carbon emission factors from fuel combustion;

[0066] Determine the carbon emissions of electricity consumed by the power system during the start-up and shutdown of coal-fired power units:

[0067]

[0068] Preferably, the second establishing unit is used to establish a steady-state coal consumption calculation model for the coal-fired power unit under rated or unrated steady-state operating conditions based on the rated or unrated steady-state operating conditions of the coal-fired power unit, using a quadratic function coal consumption equation, and to determine a power generation carbon emission factor model based on the steady-state coal consumption calculation model, including:

[0069] Determine the quadratic function coal consumption equation:

[0070]

[0071] in, P is the fuel consumption per unit time of unit output. c For the output of coal-fired power units, a, b, and c are the quadratic coefficient, linear coefficient, and constant term of the fuel consumption characteristics, respectively;

[0072] Under steady-state operation of coal-fired power units, a steady-state coal consumption calculation model is constructed:

[0073]

[0074] Where, r c This refers to the coal consumption rate for power supply under rated or non-rated steady-state operating conditions of a coal-fired power unit. When the unit is operating under rated conditions, the rated coal consumption rate for power supply is as follows:

[0075]

[0076] The carbon emission factor model for coal-fired power units under rated or unrated steady-state operation is as follows:

[0077]

[0078] in, The carbon emission factor for power generation under steady-state operation is the carbon emission of coal-fired power units under rated or unrated steady-state operation.

[0079]

[0080] in, Δt represents the carbon emissions of the coal-fired power unit under steady-state operation, and Δt represents the steady-state operation time of the power unit.

[0081] Preferably, the third establishing unit is used to establish a non-steady-state coal consumption calculation model for the coal-fired power unit under the non-steady-state operation condition of climbing a landslide, based on the non-steady-state operation condition of the coal-fired power unit through a quadratic function coal consumption equation, and to determine the average power generation carbon emission factor model based on the non-steady-state coal consumption calculation model, including:

[0082] Under unsteady-state operation of coal-fired power units, an unsteady-state coal consumption calculation model is constructed:

[0083]

[0084] in, This refers to the coal consumption of the coal-fired power unit during the landslide climbing process. This represents the force output at the end of the landslide climb. This represents the force output at the start of the landslide climb. Time spent climbing the landslide;

[0085] The average carbon emission factor model for power generation under unsteady operating conditions is as follows:

[0086]

[0087] in, ε represents the average carbon emission factor of a coal-fired power unit under unsteady operating conditions during landslide climbing. c Carbon emission factors from coal combustion;

[0088] Carbon emissions from coal-fired power units operating under unsteady conditions such as landslide climbing:

[0089]

[0090] Preferably, the system further includes a decomposition unit, used to determine the solution model for the electricity carbon emission factor under different operating conditions based on the steady-state coal consumption calculation model and the unsteady-state coal consumption calculation model, and to determine the electricity carbon emission factor vector for each node of the power grid based on the solution model for the electricity carbon emission factor.

[0091]

[0092] Among them, E C Let P be the carbon emission factor vector of electricity consumption at each node of the power grid. N Let P be the active flux matrix of the nodes. This matrix is ​​an N-order diagonal matrix. B P represents the power flow distribution matrix of the line. G E is the generator output vector. G Let T be the carbon emission factor matrix for generator power generation, and T be the matrix transpose.

[0093] The present invention provides a method and system for solving the carbon emissions of electricity consumption in power systems. The present invention constructs a refined carbon emission measurement model for coal-fired power units by refining the energy consumption model under multiple operating conditions such as start-up and shutdown, rated or unrated steady-state operation and landslide-prone unsteady-state operation, thereby improving the accuracy of carbon emission measurement of coal-fired power units under varying output conditions. Attached Figure Description

[0094] Exemplary embodiments of the present invention can be more fully understood by referring to the following figures:

[0095] Figure 1 This is a flowchart of a method for calculating carbon emissions from electricity consumption in a power system according to a preferred embodiment of the present invention.

[0096] Figure 2 This is a system structure diagram for solving the carbon emissions of electricity consumption in a power system according to a preferred embodiment of the present invention. Detailed Implementation

[0097] Exemplary embodiments of the invention will now be described with reference to the accompanying drawings. However, the invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the invention and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the drawings is not intended to limit the invention. In the drawings, the same units / elements are referred to by the same reference numerals.

[0098] Unless otherwise stated, the terms used herein (including technical terms) have their common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and not to be interpreted as having an idealized or overly formal meaning.

[0099] Figure 1 This is a flowchart of a method for calculating the carbon emissions of electricity consumption in a power system according to a preferred embodiment of the present invention.

[0100] This invention proposes a method for solving the dynamic carbon emission factor of power system based on a coal consumption model of coal-fired power plants under multiple operating conditions. First, the invention constructs carbon emission models corresponding to coal consumption, oil consumption, and electricity consumption during the start-up and shutdown of coal-fired power units. Second, it uses a quadratic function coal consumption model of coal-fired power units to construct a carbon emission quantification model for rated / unrated steady-state operation and a carbon emission factor model for power generation. Then, based on the quadratic function coal consumption model, it derives a carbon emission quantification model for the unsteady-state operation process during landslide climbing and a carbon emission factor model for power generation. Finally, combining the carbon emission flow theory of power systems, a solution model for the carbon emission factor of power system considering the coal consumption model of coal-fired power units under multiple operating conditions is constructed.

[0101] like Figure 1 As shown, the present invention provides a method for calculating the carbon emissions of electricity consumption in a power system, characterized in that the method includes:

[0102] Step 101: Establish coal consumption models, oil consumption models, and electricity consumption models for coal-fired power units during start-up and shutdown processes;

[0103] Preferably, a coal consumption model, an oil consumption model, and an electricity consumption model are established for the coal-fired power unit during start-up and shutdown, wherein the electricity consumption model is as follows:

[0104]

[0105] in, ξ1 represents the power consumption during the startup process of the coal-fired power unit, ξ1 represents the time required for stage I, and p represents the linear energy consumption factor for stage I.

[0106] Determining carbon emissions from electricity consumption in the power system based on an electricity consumption model:

[0107]

[0108] in, ε represents the carbon emissions generated by the purchased electricity consumed by coal-fired power units in Phase I. p The carbon dioxide emission factor for electricity purchased from external sources by coal-fired power units;

[0109] In Phase II, coal-fired power units mainly consume coal and fuel oil. The coal consumption model and fuel oil consumption model are as follows:

[0110]

[0111] in, and These represent the coal consumption and fuel consumption of a coal-fired power unit during startup, respectively. 21 and ξ 22 This represents the pre-start and post-start periods of the ignition-steam pressurization-turbine start-up-generator grid connection phase. 21 and c 22The linear coal consumption factors before and after the start-up are respectively, o 21 and o 22 These are the linear fuel consumption factors before and after the start-up, respectively.

[0112] Determining carbon emissions from electricity consumption in the power system based on coal and oil consumption models:

[0113]

[0114] Where, ε c ε is the carbon emission factor for coal combustion. o Carbon emission factors from fuel combustion;

[0115] Determine the carbon emissions of electricity consumed by the power system during the start-up and shutdown of coal-fired power units:

[0116]

[0117] This invention further obtains the carbon emissions generated during the start-up and shutdown of coal-fired power units by constructing models of coal consumption, oil consumption, and electricity consumption during the start-up and shutdown process.

[0118] Step 102: Based on the rated or unrated steady-state operating conditions of the coal-fired power unit, establish a steady-state coal consumption calculation model for the coal-fired power unit under rated or unrated steady-state operating conditions through a quadratic function coal consumption equation, and determine the power generation carbon emission factor model based on the steady-state coal consumption calculation model.

[0119] Preferably, based on the rated or unrated steady-state operating conditions of the coal-fired power unit, a steady-state coal consumption calculation model for the coal-fired power unit under rated or unrated steady-state operating conditions is established using a quadratic function coal consumption equation. Based on the steady-state coal consumption calculation model, a model for determining the power generation carbon emission factor is determined, including:

[0120] Determine the quadratic function coal consumption equation:

[0121]

[0122] in, P is the fuel consumption per unit time of unit output. c For the output of coal-fired power units, a, b, and c are the quadratic coefficient, linear coefficient, and constant term of the fuel consumption characteristics, respectively;

[0123] Under steady-state operation of coal-fired power units, a steady-state coal consumption calculation model is constructed:

[0124]

[0125] Where, r c This refers to the coal consumption rate for power supply under rated or non-rated steady-state operating conditions of a coal-fired power unit. When the unit is operating under rated conditions, the rated coal consumption rate for power supply is as follows:

[0126]

[0127] The carbon emission factor model for coal-fired power units under rated or unrated steady-state operation is as follows:

[0128]

[0129] in, The carbon emission factor for power generation under steady-state operation is the carbon emission of coal-fired power units under rated or unrated steady-state operation.

[0130]

[0131] in, Δt represents the carbon emissions of the coal-fired power unit under steady-state operation, and Δt represents the steady-state operation time of the power unit.

[0132] This invention addresses the rated / unrated steady-state operation of coal-fired power units by constructing a model of coal consumption rate and power generation carbon emission factor during rated / unrated steady-state operation using a quadratic function coal consumption equation.

[0133] Step 103: Based on the unsteady operating conditions of the coal-fired power unit climbing the landslide, establish a calculation model for the unsteady coal consumption of the coal-fired power unit under the unsteady operating conditions of climbing the landslide using a quadratic function coal consumption equation, and determine the average power generation carbon emission factor model based on the calculation model for the unsteady coal consumption.

[0134] Preferably, based on the unsteady-state operating condition of the coal-fired power unit during the landslide climbing process, a calculation model for the unsteady-state coal consumption of the coal-fired power unit under the unsteady-state operating condition of the landslide climbing is established through a quadratic function coal consumption equation. Based on the unsteady-state coal consumption calculation model, an average power generation carbon emission factor model is determined, including:

[0135] Under unsteady-state operation of coal-fired power units, an unsteady-state coal consumption calculation model is constructed:

[0136]

[0137] in, This refers to the coal consumption of the coal-fired power unit during the landslide climbing process. This represents the force output at the end of the landslide climb. This represents the force output at the start of the landslide climb. Time spent climbing the landslide;

[0138] The average carbon emission factor model for power generation under unsteady operating conditions is as follows:

[0139]

[0140] in, ε represents the average carbon emission factor of a coal-fired power unit under unsteady operating conditions during landslide climbing. c Carbon emission factors from coal combustion;

[0141] Carbon emissions from coal-fired power units operating under unsteady conditions such as landslide climbing:

[0142]

[0143] This invention addresses the unsteady-state operation of coal-fired power units climbing landslides. Based on a quadratic function coal consumption equation, it constructs a coal consumption calculation model and an average power generation carbon emission factor model for coal-fired power units during the landslide climbing process.

[0144] Step 104: Determine the carbon emissions of electricity consumption in the power system based on the coal consumption model, oil consumption model, electricity consumption model, power generation carbon emission factor model, and average power generation carbon emission factor model.

[0145] Preferably, the method further includes: determining the solution model for the electricity carbon emission factor under different operating conditions based on the steady-state coal consumption calculation model and the unsteady-state coal consumption calculation model; and determining the electricity carbon emission factor vector for each node of the power grid based on the solution model for the electricity carbon emission factor.

[0146]

[0147] Among them, E C Let P be the carbon emission factor vector of electricity consumption at each node of the power grid. N Let P be the active flux matrix of the nodes. This matrix is ​​an N-order diagonal matrix. B P represents the power flow distribution matrix of the line. G E is the generator output vector. G Let T be the carbon emission factor matrix for generator power generation, and T be the matrix transpose.

[0148] This invention addresses the problem that current calculations of electricity carbon emission factors do not consider the various operating conditions of coal-fired power units. It proposes a method for solving the electricity carbon emission factor of a power system based on a coal consumption model for multiple operating conditions of coal-fired power plants. Specifically, this invention first constructs models of coal consumption, fuel consumption, and electricity consumption of coal-fired power units during start-up and shutdown, further obtaining the carbon emissions generated by the units during these processes. Second, for rated / unrated steady-state operating conditions of coal-fired power units, a model of coal consumption rate and power generation carbon emission factor during rated / unrated steady-state operation is constructed using a quadratic function coal consumption equation. Then, based on the quadratic function coal consumption equation, a model for calculating coal consumption during the landslide climbing process of coal-fired power units and an average power generation carbon emission factor model are constructed. Finally, based on the power system carbon emission flow theory, a solution model for the electricity carbon emission factor considering the coal consumption model for multiple operating conditions of coal-fired power units is constructed.

[0149] This invention not only addresses the measurement of carbon emissions from power generation under various operating conditions, including start-up and shutdown of coal-fired power units, rated / unrated steady-state operation, and landslide-prone unsteady-state operation, but also, by incorporating power system carbon emission flow theory, characterizes the impact of coal-fired power unit carbon emission variations under multiple operating conditions on the dynamic carbon emission factors of the power system. This helps power grid companies and power generation enterprises understand the carbon emission characteristics of coal-fired power units under unrated operating conditions, clarify the refined changes in the dynamic carbon emission factors of the entire system, and thus assist power grid companies and power generation enterprises in implementing targeted carbon reduction measures for the power system.

[0150] Based on the theory of carbon emission factors for power generation under different operating conditions and carbon emission flow in the power system, this invention constructs a solution model for the carbon emission factors of electricity consumption that considers the coal consumption model of coal-fired power units under multiple operating conditions.

[0151] Based on the theory of carbon emission factors for power generation under different operating conditions and carbon emission flow in the power system, this invention constructs a solution model for the carbon emission factors of electricity consumption that considers the coal consumption model of coal-fired power units under multiple operating conditions.

[0152] The following example illustrates the method for solving the carbon emission factor of electricity consumption in the power system based on a coal consumption model under multiple operating conditions of coal-fired power plants proposed in this invention:

[0153] 1) By constructing models of coal consumption, fuel consumption, and electricity consumption during the start-up and shutdown of coal-fired power units, the carbon emissions generated during these processes can be further obtained. Specific steps include:

[0154] The start-up and shutdown process of coal-fired power units is divided into stages according to energy consumption. The start-up process can be divided into the boiler ignition preparation stage (stage I) and the boiler ignition-steam pressurization-turbine start-up-generator grid connection stage (stage II). Since the shutdown process consumes less external energy, its carbon emissions are 0. The main analysis focuses on the changes in carbon emissions during the start-up process.

[0155] In Phase I, the main energy consumption of coal-fired power units is the electrical energy consumption of plant auxiliary equipment such as forced draft fans, induced draft fans, and feedwater pumps. The electrical energy in this phase is purchased from external sources. The electrical energy consumption model is constructed as follows:

[0156]

[0157] In the formula, Let ξ be the power consumption during the startup process of the coal-fired power unit, in MWh; ξ1 be the time required for stage I, in min; and p be the linear energy consumption factor for stage I, in MWh / min. Based on the above formula, the carbon emissions caused by the energy consumption in stage I can be obtained as follows:

[0158]

[0159] In the formula, The carbon emissions generated by purchased electricity consumed by coal-fired power units in Phase I are expressed in tCO2 and ε. p This represents the carbon dioxide emission factor of purchased electricity from coal-fired power units, expressed in tCO2 / MWh.

[0160] In Phase II, coal-fired power units mainly consume coal and fuel oil. The consumption characteristics can be divided into pre-commissioning and post-commissioning phases. The two energy consumption models for this phase are as follows:

[0161]

[0162] In the formula, and These represent the coal consumption and fuel consumption of a coal-fired power unit during startup, in tons (t) and liters (L), respectively. 21 and ξ 22 This represents the period before and after the start-up phase of the ignition-steam pressurization-turbine start-up-generator grid connection process, in minutes (c). 21 and c 22 These are the linear coal consumption factors before and after the start-up, in t / min. 21 and o 22 These are the linear fuel consumption factors before and after start-up, respectively, in L / min. During startup, the carbon emissions generated by the Stage II generator unit are...

[0163]

[0164] In the formula, ε c ε is the carbon emission factor for coal combustion. o This refers to the carbon emission factor from fuel oil combustion. Therefore, the carbon emissions generated by coal-fired power units during startup can be further obtained as follows:

[0165]

[0166] In the formula, This represents the carbon emissions during the startup of coal-fired power units, expressed in tons of CO2 (tCO2).

[0167] 2) For the rated / unrated steady-state operation of coal-fired power units, a model of coal consumption rate and power generation carbon emission factor during rated / unrated steady-state operation was constructed using a quadratic function coal consumption equation. Specific steps include:

[0168] Based on the coal-fired power units studied, the consumption characteristic model during operation obtained from the manufacturer is as follows:

[0169]

[0170] In the formula, Fuel consumption per unit time of unit output, expressed in tons (t) or kilometres (P). cThe output of the coal-fired power unit is expressed in MW. a, b, and c represent the quadratic coefficient, linear coefficient, and constant term of the fuel consumption characteristic, respectively, with units of t / (MW). 2 , t / MW and t.

[0171] Under steady-state operation, the coal consumption rate model for power generation is constructed as follows:

[0172]

[0173] In the formula, r c This refers to the coal consumption rate for power generation under rated / non-rated steady-state operation of coal-fired power units, expressed in t / MW. Specifically, when the unit is under rated operating conditions (P... c =P c,0 At that time, where P c,0 (Rated output of coal-fired power units), the rated coal consumption rate for power supply is as follows:

[0174]

[0175] The carbon emission factors of coal-fired power units under rated / non-rated steady-state operation are as follows:

[0176]

[0177] In the formula, The carbon emission factor for power generation under steady-state operation is expressed in tCO2 / MWh. The carbon emissions from coal-fired power units under rated / non-rated operating conditions are as follows:

[0178]

[0179] In the formula, Δt represents the carbon emissions of the coal-fired power unit under steady-state operation, expressed in tCO2, and Δt represents the steady-state operation time of the power unit, expressed in hours.

[0180] 3) For the unsteady operation of coal-fired power units climbing landslides, a calculation model for coal consumption and an average power generation carbon emission factor model are constructed based on the quadratic function coal consumption equation.

[0181] Based on equation (7), the coal consumption during the landslide climbing process of the coal-fired power unit is constructed as follows:

[0182]

[0183] In the formula, This represents the coal consumption of the coal-fired power unit during the landslide climbing process, expressed in tons (t). This represents the output value at the end of the landslide climb, in MW. The output value at the start of the landslide climb is expressed in MW. This represents the time required to climb the landslide. Therefore, the carbon emissions generated by the coal-fired power unit during the landslide climbing process are:

[0184]

[0185] For a linear landslide climbing process, the carbon emission factors of coal-fired power units during the landslide climbing process are as follows:

[0186]

[0187] In the formula, The carbon emission factor for power generation during the landslide climbing process of the coal-fired power unit is expressed in tCO2 / MWh. From equation (14), it can be deduced that when the unit is not in the landslide climbing state (which can be considered as...), Equation (14) is equivalent to (10).

[0188] 4) Based on the theories of power generation carbon emission factors and power system carbon emission flows under different operating conditions, a model for solving the carbon emission factor of electricity consumption, considering the coal consumption model of coal-fired power units under multiple operating conditions, was constructed. Specific steps include:

[0189] Since the generating unit does not generate actual grid-supplied electricity during startup, the direct / indirect carbon emissions during startup and shutdown should not be allocated by the grid. Carbon emissions generated only under rated / unrated steady-state operating conditions and landslide-prone unsteady-state operating conditions should be allocated across the entire grid using carbon emission flow theory.

[0190]

[0191] In the formula, E C Let P be the carbon emission factor vector of electricity consumption at each node of the power grid. N P is the active power flux matrix at the nodes. This matrix is ​​an N-order diagonal matrix used to represent the "absolute amount" of active power flowing into the nodes in the direction of power flow. The diagonal terms in the matrix correspond to the active power flux at the nodes. B This represents the line power flow distribution matrix, which describes the active power flow distribution of the power system. All off-diagonal elements of this matrix represent the power flow between branches, while diagonal elements are 0. G E is the generator output vector. G The carbon emission factor matrix for generators is given. For coal-fired power units, the carbon emission factor is solved using equation (10) (rated or unrated steady-state operation) or equation (14) (unsteady-state operation with landslide erosion). For the values ​​of other units in the carbon emission factor matrix, the value can be set to 0 for zero-carbon units and the typical carbon emission factor can be selected for carbon emission units.

[0192] Figure 2 This is a system structure diagram for solving the carbon emissions of electricity consumption in a power system according to a preferred embodiment of the present invention.

[0193] like Figure 2 As shown, this invention provides a system for solving the carbon emissions of electricity consumption in a power system. The system includes:

[0194] The first establishment unit 201 is used to establish the coal consumption model, oil consumption model and electricity consumption model of the coal-fired power unit during the start-up and shutdown process;

[0195] The second establishment unit 202 is used to establish a steady-state coal consumption calculation model of the coal-fired power unit under rated or unrated steady-state operating conditions based on the rated or unrated steady-state operating conditions of the coal-fired power unit through a quadratic function coal consumption equation, and to determine the power generation carbon emission factor model based on the steady-state coal consumption calculation model.

[0196] The third unit 203 is used to establish a non-steady-state coal consumption calculation model for coal-fired power units under the non-steady-state operation condition of climbing landslides based on the non-steady-state operation condition of climbing landslides through a quadratic function coal consumption equation, and to determine the average power generation carbon emission factor model based on the non-steady-state coal consumption calculation model.

[0197] Result unit 204 is used to determine the carbon emissions of electricity consumption in the power system based on the coal consumption model, oil consumption model, electricity consumption model, power generation carbon emission factor model and average power generation carbon emission factor model.

[0198] Preferably, the first establishing unit 201 is used to establish a coal consumption model, an oil consumption model, and an electricity consumption model for the coal-fired power unit during start-up and shutdown, wherein the electricity consumption model is:

[0199]

[0200] in, ξ1 represents the power consumption during the startup process of the coal-fired power unit, ξ1 represents the time required for stage I, and p represents the linear energy consumption factor for stage I.

[0201] Determining carbon emissions from electricity consumption in the power system based on an electricity consumption model:

[0202]

[0203] in, ε represents the carbon emissions generated by the purchased electricity consumed by coal-fired power units in Phase I. p The carbon dioxide emission factor for electricity purchased from external sources by coal-fired power units;

[0204] In Phase II, coal-fired power units mainly consume coal and fuel oil. The coal consumption model and fuel oil consumption model are as follows:

[0205]

[0206] in, and These represent the coal consumption and fuel consumption of a coal-fired power unit during startup, respectively. 21 and ξ 22 This represents the pre-start and post-start periods of the ignition-steam pressurization-turbine start-up-generator grid connection phase. 21 and c 22 The linear coal consumption factors before and after the start-up are respectively, o 21 and o 22 These are the linear fuel consumption factors before and after the start-up, respectively.

[0207] Determining carbon emissions from electricity consumption in the power system based on coal and oil consumption models:

[0208]

[0209] Where, ε c ε is the carbon emission factor for coal combustion. o Carbon emission factors from fuel combustion;

[0210] Determine the carbon emissions of electricity consumed by the power system during the start-up and shutdown of coal-fired power units:

[0211]

[0212] Preferably, the second establishing unit 202 is used to establish a steady-state coal consumption calculation model for the coal-fired power unit under rated or unrated steady-state operating conditions based on the rated or unrated steady-state operating conditions of the coal-fired power unit, using a quadratic function coal consumption equation, and to determine the power generation carbon emission factor model based on the steady-state coal consumption calculation model, including:

[0213] Determine the quadratic function coal consumption equation:

[0214]

[0215] in, P is the fuel consumption per unit time of unit output. c For the output of coal-fired power units, a, b, and c are the quadratic coefficient, linear coefficient, and constant term of the fuel consumption characteristics, respectively;

[0216] Under steady-state operation of coal-fired power units, a steady-state coal consumption calculation model is constructed:

[0217]

[0218] Where, r c This refers to the coal consumption rate for power supply under rated or non-rated steady-state operating conditions of a coal-fired power unit. When the unit is operating under rated conditions, the rated coal consumption rate for power supply is as follows:

[0219]

[0220] The carbon emission factor model for coal-fired power units under rated or unrated steady-state operation is as follows:

[0221]

[0222] in, The carbon emission factor for power generation under steady-state operation is the carbon emission of coal-fired power units under rated or unrated steady-state operation.

[0223]

[0224] in, Δt represents the carbon emissions of the coal-fired power unit under steady-state operation, and Δt represents the steady-state operation time of the power unit.

[0225] Preferably, the third establishing unit 203 is used to establish a non-steady-state coal consumption calculation model for the coal-fired power unit under the non-steady-state operation condition of climbing a landslide, based on the non-steady-state operation condition of the coal-fired power unit through a quadratic function coal consumption equation, and to determine the average power generation carbon emission factor model based on the non-steady-state coal consumption calculation model, including:

[0226] Under unsteady-state operation of coal-fired power units, an unsteady-state coal consumption calculation model is constructed:

[0227]

[0228] in, This refers to the coal consumption of the coal-fired power unit during the landslide climbing process. This represents the force output at the end of the landslide climb. This represents the force output at the start of the landslide climb. Time spent climbing the landslide;

[0229] The average carbon emission factor model for power generation under unsteady operating conditions is as follows:

[0230]

[0231] in, ε represents the average carbon emission factor of a coal-fired power unit under unsteady operating conditions during landslide climbing. c Carbon emission factors from coal combustion;

[0232] Carbon emissions from coal-fired power units operating under unsteady conditions such as landslide climbing:

[0233]

[0234] Preferably, the system further includes a decomposition unit 205, used to determine the solution model for the electricity carbon emission factor under different operating conditions based on the steady-state coal consumption calculation model and the unsteady-state coal consumption calculation model, and to determine the electricity carbon emission factor vector of each node of the power grid based on the solution model for the electricity carbon emission factor.

[0235]

[0236] Among them, E C Let P be the carbon emission factor vector of electricity consumption at each node of the power grid. N Let P be the active flux matrix of the nodes. This matrix is ​​an N-order diagonal matrix. B P represents the power flow distribution matrix of the line. G E is the generator output vector. G Let T be the carbon emission factor matrix for generator power generation, and T be the matrix transpose.

[0237] The preferred embodiment of the present invention provides a system for solving the carbon emissions of electricity consumption in a power system, which corresponds to another preferred embodiment of the present invention, a method for solving the carbon emissions of electricity consumption in a power system, and will not be described in detail here.

[0238] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present invention can be implemented using various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0239] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. 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 illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0240] 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.

[0241] 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.

[0242] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0243] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0244] The invention has been described with reference to a few embodiments. However, as will be known to those skilled in the art, as defined in the appended claims, other embodiments besides those disclosed above fall equivalently within the scope of the invention.

[0245] Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the art, unless otherwise expressly defined herein. All references to “a / the / the [device, component, etc.]” ​​are openly interpreted as at least one instance of said device, component, etc., unless otherwise expressly stated. The steps of any method disclosed herein need not be performed in the exact order disclosed unless explicitly stated otherwise.

Claims

1. A method for calculating carbon emissions from electricity consumption in a power system, characterized in that, The method includes: Establish coal consumption models, oil consumption models, and electricity consumption models for coal-fired power units during start-up and shutdown processes; Based on the rated or unrated steady-state operating conditions of coal-fired power units, a steady-state coal consumption calculation model for coal-fired power units under rated or unrated steady-state operating conditions is established, and a power generation carbon emission factor model is determined based on the steady-state coal consumption calculation model. Based on the unsteady operating conditions of coal-fired power units during the landslide climbing process, an unsteady coal consumption calculation model for coal-fired power units under the unsteady operating conditions of landslide climbing is established, and an average power generation carbon emission factor model is determined based on the unsteady coal consumption calculation model. Based on the aforementioned coal consumption model, oil consumption model, electricity consumption model, power generation carbon emission factor model, and average power generation carbon emission factor model, the carbon emissions from electricity consumption in the power system are determined.

2. The method for calculating carbon emissions from electricity consumption in a power system according to claim 1, characterized in that, The establishment of coal consumption, oil consumption, and electricity consumption models for coal-fired power units during start-up and shutdown processes, wherein the electricity consumption model is as follows: in, ξ1 represents the power consumption during the startup process of the coal-fired power unit, ξ1 represents the time required for stage I, and p represents the linear energy consumption factor for stage I. Based on the aforementioned power consumption model, determine the carbon emissions from electricity consumption in the power system: in, ε represents the carbon emissions generated by the purchased electricity consumed by coal-fired power units in Phase I. p The carbon dioxide emission factor for electricity purchased from external sources by coal-fired power units; In Phase II, coal-fired power units mainly consume coal and fuel oil. The coal consumption model and the fuel oil consumption model are as follows: in, and These represent the coal consumption and fuel consumption of a coal-fired power unit during startup, respectively. 21 and ξ 22 This represents the pre-start and post-start periods of the ignition-steam pressurization-turbine start-up-generator grid connection phase. 21 and c 22 The linear coal consumption factors before and after the start-up are respectively, o 21 and o 22 These are the linear fuel consumption factors before and after the start-up, respectively. Based on the coal consumption model and the oil consumption model, determine the carbon emissions from electricity consumption in the power system: Where, ε c ε is the carbon emission factor for coal combustion. o Carbon emission factors from fuel combustion; Determine the carbon emissions of electricity consumed by the power system during the start-up and shutdown of coal-fired power units:

3. The method for calculating carbon emissions from electricity consumption in a power system according to claim 1, characterized in that, Based on the rated or unrated steady-state operating conditions of coal-fired power units, a steady-state coal consumption calculation model for coal-fired power units under rated or unrated steady-state operating conditions is established using a quadratic function coal consumption equation. Based on this steady-state coal consumption calculation model, a power generation carbon emission factor model is determined, including: Determine the quadratic function coal consumption equation: in, P is the fuel consumption per unit time of unit output. c For the output of coal-fired power units, a, b, and c are the quadratic coefficient, linear coefficient, and constant term of the fuel consumption characteristics, respectively; Under steady-state operation of coal-fired power units, a steady-state coal consumption calculation model is constructed: Where, r c This refers to the coal consumption rate for power supply under rated or non-rated steady-state operating conditions of a coal-fired power unit. When the unit is operating under rated conditions, the rated coal consumption rate for power supply is as follows: The carbon emission factor model for coal-fired power units under rated or unrated steady-state operation is as follows: in, The carbon emission factor for power generation under steady-state operation is the carbon emission of coal-fired power units under rated or unrated steady-state operation. in, Δt represents the carbon emissions of the coal-fired power unit under steady-state operation, and Δt represents the steady-state operation time of the power unit.

4. The method for calculating carbon emissions from electricity consumption in a power system according to claim 3, characterized in that, The unsteady-state operating condition based on the landslide climbing process of the coal-fired power unit establishes an unsteady-state coal consumption calculation model for the coal-fired power unit under the unsteady-state operating condition of landslide climbing through a quadratic function coal consumption equation. Based on the unsteady-state coal consumption calculation model, an average power generation carbon emission factor model is determined, including: Under unsteady-state operation of coal-fired power units, an unsteady-state coal consumption calculation model is constructed: in, This refers to the coal consumption of the coal-fired power unit during the landslide climbing process. This represents the force output at the end of the landslide climb. This represents the force output at the start of the landslide climb. Time spent climbing the landslide; The average carbon emission factor model for power generation under unsteady operating conditions is as follows: in, ε represents the average carbon emission factor of a coal-fired power unit under unsteady operating conditions during landslide climbing. c Carbon emission factors from coal combustion; Carbon emissions from coal-fired power units operating under unsteady conditions such as landslide climbing:

5. The method for calculating carbon emissions from electricity consumption in a power system according to claim 1, characterized in that, The method further includes: determining the electricity carbon emission factor solution model under different operating conditions based on the steady-state coal consumption calculation model and the unsteady-state coal consumption calculation model; and determining the electricity carbon emission factor vector of each node of the power grid based on the electricity carbon emission factor solution model. Among them, E C Let P be the carbon emission factor vector of electricity consumption at each node of the power grid. N Let P be the active flux matrix of the nodes. This matrix is ​​an N-order diagonal matrix. B P represents the power flow distribution matrix of the line. G E is the generator output vector. G Let T be the carbon emission factor matrix for generator power generation, and T be the matrix transpose.

6. A system for calculating carbon emissions from electricity consumption in a power system, characterized in that, The system includes: The first establishment unit is used to establish the coal consumption model, oil consumption model and electricity consumption model of the coal-fired power unit during the start-up and shutdown process; The second establishment unit is used to establish a steady-state coal consumption calculation model for coal-fired power units under rated or unrated steady-state operating conditions based on the rated or unrated steady-state operating conditions of the coal-fired power units, and to determine the power generation carbon emission factor model based on the steady-state coal consumption calculation model. The third unit is used to establish a non-steady-state coal consumption calculation model for coal-fired power units under the non-steady-state operation condition of climbing landslides, based on the non-steady-state operation condition of the coal-fired power units climbing landslides, and to determine the average power generation carbon emission factor model based on the non-steady-state operation condition of the coal-fired power units climbing landslides. The result unit is used to determine the carbon emissions of electricity consumption in the power system based on the coal consumption model, oil consumption model, electricity consumption model, power generation carbon emission factor model, and average power generation carbon emission factor model.

7. A system for calculating carbon emissions from electricity consumption in a power system according to claim 6, characterized in that, The first establishment unit is used to establish a coal consumption model, an oil consumption model, and an electricity consumption model for the coal-fired power unit during start-up and shutdown, wherein the electricity consumption model is as follows: in, ξ1 represents the power consumption during the startup process of the coal-fired power unit, ξ1 represents the time required for stage I, and p represents the linear energy consumption factor for stage I. Based on the aforementioned power consumption model, determine the carbon emissions from electricity consumption in the power system: in, ε represents the carbon emissions generated by the purchased electricity consumed by coal-fired power units in Phase I. p The carbon dioxide emission factor for electricity purchased from external sources by coal-fired power units; In Phase II, coal-fired power units mainly consume coal and fuel oil. The coal consumption model and the fuel oil consumption model are as follows: in, and These represent the coal consumption and fuel consumption of a coal-fired power unit during startup, respectively. 21 and ξ 22 This represents the pre-start and post-start periods of the ignition-steam pressurization-turbine start-up-generator grid connection phase. 21 and c 22 The linear coal consumption factors before and after the start-up are respectively, o 21 and o 22 These are the linear fuel consumption factors before and after the start-up, respectively. Based on the coal consumption model and the oil consumption model, determine the carbon emissions from electricity consumption in the power system: Where, ε c ε is the carbon emission factor for coal combustion. o Carbon emission factors from fuel combustion; Determine the carbon emissions of electricity consumed by the power system during the start-up and shutdown of coal-fired power units:

8. A system for calculating carbon emissions from electricity consumption in a power system according to claim 6, characterized in that, The second establishing unit is used to establish a steady-state coal consumption calculation model for coal-fired power units under rated or unrated steady-state operating conditions based on the rated or unrated steady-state operating conditions of the coal-fired power units, using a quadratic function coal consumption equation, and to determine a power generation carbon emission factor model based on the steady-state coal consumption calculation model, including: Determine the quadratic function coal consumption equation: in, P is the fuel consumption per unit time of unit output. c For the output of coal-fired power units, a, b, and c are the quadratic coefficient, linear coefficient, and constant term of the fuel consumption characteristics, respectively; Under steady-state operation of coal-fired power units, a steady-state coal consumption calculation model is constructed: Where, r c This refers to the coal consumption rate for power supply under rated or non-rated steady-state operating conditions of a coal-fired power unit. When the unit is operating under rated conditions, the rated coal consumption rate for power supply is as follows: The carbon emission factor model for coal-fired power units under rated or unrated steady-state operation is as follows: in, The carbon emission factor for power generation under steady-state operation is the carbon emission of coal-fired power units under rated or unrated steady-state operation. in, Δt represents the carbon emissions of the coal-fired power unit under steady-state operation, and Δt represents the steady-state operation time of the power unit.

9. A system for calculating carbon emissions from electricity consumption in a power system according to claim 8, characterized in that, The third establishing unit is used to establish a non-steady-state coal consumption calculation model for coal-fired power units under the non-steady-state operation condition of landslide climbing based on the non-steady-state operation condition of the coal-fired power unit through a quadratic function coal consumption equation, and to determine the average power generation carbon emission factor model based on the non-steady-state coal consumption calculation model, including: Under unsteady-state operation of coal-fired power units, an unsteady-state coal consumption calculation model is constructed: in, This refers to the coal consumption of the coal-fired power unit during the landslide climbing process. This represents the force output at the end of the landslide climb. This represents the force output at the start of the landslide climb. Time spent climbing the landslide; The average carbon emission factor model for power generation under unsteady operating conditions is as follows: in, ε represents the average carbon emission factor of a coal-fired power unit under unsteady operating conditions during landslide climbing. c Carbon emission factors from coal combustion; Carbon emissions from coal-fired power units operating under unsteady conditions such as landslide climbing:

10. A system for calculating carbon emissions from electricity consumption in a power system according to claim 6, characterized in that, The system also includes a decomposition unit, used to determine the solution model for the electricity carbon emission factor under different operating conditions based on the steady-state coal consumption calculation model and the unsteady-state coal consumption calculation model, and to determine the electricity carbon emission factor vector for each node of the power grid based on the solution model for the electricity carbon emission factor. Among them, E C Let P be the carbon emission factor vector of electricity consumption at each node of the power grid. N Let P be the active flux matrix of the nodes. This matrix is ​​an N-order diagonal matrix. B P represents the power flow distribution matrix of the line. G E is the generator output vector. G Let T be the carbon emission factor matrix for generator power generation, and T be the matrix transpose.

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