Method for converting and analyzing carbon emission intensity of coal-fired power supply

Abstract

The invention discloses a coal-fired power supply carbon emission intensity conversion analysis method, which comprises the following steps of: obtaining unit mass carbon content and carbon oxidation rate data of coal, and calculating a CO2 generation coefficient of unit standard coal consumption of a unit; acquiring coal-fired unit power supply coal consumption data, and calculating coal-fired power supply carbon emission intensity; performing subsystem decomposition on the power supply coal consumption according to the energy utilization condition of each system, and converting the coal consumption decomposition amount corresponding to the energy loss of each system into carbon conversion intensity; analyzing carbon conversion intensity distribution under different load working conditions, and determining a carbon emission intensity change rule of each system; influence factors are analyzed according to the change rule of the carbon emission intensity of each system, and improvement measures are put forward; according to the method, a basis is provided for making effective carbon emission reduction measures for a coal-fired power plant to reduce CO2 emission.

Description

Technical Field

[0001] This invention relates to the field of carbon emission research technology, specifically to a method for converting and analyzing the carbon emission intensity of coal-fired power generation. Background Technology

[0002] Reducing carbon emissions from coal-fired power plants is crucial, and for these plants, it is urgent to develop effective carbon reduction measures to lower CO2 emissions. Domestic research on carbon emissions from coal-fired power plants mainly focuses on calculation models, such as establishing models to calculate CO2 emissions from coal combustion, denitrification, and power purchase processes within the power plant, and calculating the annual CO2 emissions of units with different capacities; establishing models to calculate CO2 emissions from the coal combustion process, and analyzing the impact of factors such as raw coal consumption on CO2 emissions from power generation. Existing technologies primarily construct macroscopic models, establishing emission relationships or calculating total annual emissions through overall parameters such as coal consumption and power generation. However, research on the impact of various systems involved in the coal combustion process on the total CO2 emissions of the power plant is lacking, thus lacking a basis for developing targeted carbon reduction measures. Summary of the Invention

[0003] Purpose of the invention: The purpose of this invention is to provide a method for converting and analyzing the carbon emission intensity of coal-fired power generation, in order to solve the problem that existing methods lack research on the impact of various systems involved in the coal combustion process on the total CO2 emissions of power plants.

[0004] Technical solution: The present invention provides a method for converting and analyzing the carbon emission intensity of coal-fired power generation, comprising the following steps:

[0005] (1) Obtain data on the carbon content and carbon oxidation rate per unit mass of coal, and the CO2 generation coefficient of the unit standard coal consumption of the computer group;

[0006] (2) Obtain coal consumption data for power generation from coal-fired units and calculate the carbon emission intensity of power generation from coal-fired units;

[0007] (3) The coal consumption for power supply is decomposed into subsystems based on the energy utilization status of each system, and the coal consumption decomposition amount corresponding to the energy loss of each system is converted into carbon conversion intensity.

[0008] (4) Analyze the carbon equivalent intensity distribution under different load conditions and determine the variation law of carbon emission intensity of each system;

[0009] (5) Analyze the influencing factors based on the carbon emission intensity change patterns of each system and propose improvement measures.

[0010] Furthermore, step (1) includes the following steps:

[0011] (11) Obtain industrial analysis data for coal, including volatile matter content (VM), fixed carbon content (FC), and lower heating value (Q).net,ar The ash content (A) and moisture content (M) of coal are used to obtain the lower heating value (Q) of standard coal. net,ar ), lower heating value of coal (Q′) net,ar );

[0012] (12) Calculate the mass of coal corresponding to a unit of standard coal based on the law of conservation of energy, and calculate the carbon content (C) of a unit of standard coal based on the carbon content of the received coal. ar );

[0013] (13) Through slag production (G Z ), carbon content in slag (C) Z ), fly ash production (G h ), carbon content in fly ash (C h ), coal consumption (F) c The carbon content of the coal (w(C)) and the carbon oxidation rate (OF) calculated based on the dust collector efficiency are used to determine the carbon oxidation rate. M The formula is as follows:

[0014]

[0015] Among them, G Z Slag production, in kg / s; G h Fly ash production, in kg / s; C Z The carbon content of slag is expressed in kg / s; C h F represents the carbon content of fly ash, expressed in kg / s. c The unit of measurement is the amount of coal consumed, expressed in kg / s; w(C) represents the carbon content of the coal by mass, expressed in %; η cc The efficiency of a dust collector is expressed in percent.

[0016] (14) Carbon content per unit mass (C) m ) and carbon oxidation rate (OF M The CO2 generation coefficient (K) per unit of standard coal is calculated using the following formula:

[0017]

[0018] Where K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; OF M This is the carbon oxidation rate per unit of standard coal, expressed as a percentage.

[0019] Furthermore, step (2) includes the following steps:

[0020] (21) Obtain the coal consumption for power generation of coal-fired units (b) cp,n )data;

[0021] (22) Based on the coal consumption for power generation of coal-fired units (b) cp,nThe CO2 generation coefficient (K) per unit of standard coal is used to calculate the carbon emission intensity of coal-fired power generation.

[0022] 4. The method for converting and analyzing the carbon emission intensity of coal-fired power generation according to claim 1, characterized in that step (3) includes the following steps:

[0023] (31) The coal consumption for power supply is broken down into the plant power system, boiler system, pipeline system, steam turbine system, mechanical system and generator system;

[0024] (32) Obtain the carbon equivalent intensity of the plant power system using the following formula:

[0025]

[0026] in, Carbon intensity of the plant power system, in g / kWh; ξ cp Plant power consumption rate, in percentage; b cp,n The coal consumption for power generation of the unit is expressed in g / kWh.

[0027] (33) Obtain the carbon equivalent intensity of the boiler system, which is the sum of the carbon equivalent intensity of each component loss, as shown in the following formula:

[0028]

[0029] in, The carbon equivalent intensity of flue gas heat loss q2 is expressed in g / kWh. The carbon-based intensity of the heat loss q3 due to incomplete combustion of gas is expressed in g / kWh. The carbon-based intensity of the heat loss q4 from incomplete combustion of solids is expressed in g / kWh. Carbon equivalent intensity for heat loss q5, in g / kWh; The carbon equivalent intensity of the physical heat loss q6 of ash residue is expressed in g / kWh. Carbon intensity of the boiler system, in g / kWh;

[0030] (34) Obtain the carbon equivalent intensity of the pipeline system using the following formula:

[0031]

[0032] Where K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; b cp,n The coal consumption for power generation of the unit is expressed as a percentage; ξ cp Plant power consumption rate, in %; η b Boiler back-balance efficiency, in %; η p Pipeline efficiency, expressed as a percentage.

[0033] (35) Obtain the carbon equivalent intensity of the steam turbine system using the following formula:

[0034]

[0035] Where K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; b cp,n The coal consumption for power generation of the unit is expressed in g / kWh; ξ cp Plant power consumption rate, in %; η b Boiler back-balance efficiency, in %; η p Pipeline efficiency, expressed as a percentage (%); η i The absolute internal efficiency of the steam turbine is expressed as a percentage (%).

[0036] (36) Obtain the carbon equivalent strength of the mechanical system using the following formula:

[0037]

[0038] Where K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; b cp,n The coal consumption for power generation of the unit is expressed in g / kWh; ξ cp Plant power consumption rate, in %; η b Boiler back-balance efficiency, in %; η p Pipeline efficiency, expressed as a percentage (%); η i η is the absolute internal efficiency of the steam turbine, expressed as a percentage (%). m Mechanical efficiency, expressed as a percentage.

[0039] (37) Obtain the carbon equivalent intensity of the generator system using the following formula:

[0040]

[0041] Where K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; b cp,n The coal consumption for power generation of the unit is expressed in g / kWh; ξ cp Plant power consumption rate, in %; η b Boiler back-balance efficiency, in %; η p Pipeline efficiency, expressed as a percentage (%); η i η is the absolute internal efficiency of the steam turbine, expressed as a percentage (%). m Mechanical efficiency, expressed as %; η g Generator efficiency, expressed as a percentage.

[0042] Furthermore, the boiler system's component losses include flue gas heat loss q2, incomplete gas combustion loss q3, incomplete solid combustion loss q4, heat dissipation loss q5, and ash and slag physical heat loss q6, as shown in the following formula:

[0043]

[0044] Where K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; b cp,n Coal consumption for power generation of the unit, in g / kWh; q x The various losses of the boiler are expressed as a percentage. For various losses in the boiler system q x Carbon intensity, expressed in g / kWh.

[0045] Furthermore, step (4) includes the following steps:

[0046] (41) Analyze the distribution and variation of carbon equivalent intensity of each system under 30%-40% load conditions;

[0047] (42) Analyze the distribution and variation law of carbon equivalent intensity of each system under 50%-60% load conditions;

[0048] (43) Analyze the distribution and variation law of carbon equivalent intensity of each system under 70%-80% load conditions;

[0049] (44) Analyze the distribution and variation of carbon equivalent intensity of each system under 90%-100% load conditions.

[0050] Further, step (5) is as follows: Identify the systems that have a significant impact on the carbon emission intensity of coal-fired power generation by examining the relationship between the carbon emission intensity of coal-fired power generation and the unit load, conduct carbon emission reduction potential analysis, and formulate improvement measures.

[0051] The present invention provides a system for converting and analyzing the carbon emission intensity of coal-fired power generation, comprising:

[0052] Generation coefficient module: used to obtain data on carbon content and carbon oxidation rate per unit mass of coal, and CO2 generation coefficient per unit standard coal consumption of the computer group;

[0053] Carbon emission intensity module: used to acquire coal consumption data for power generation from coal-fired units and calculate the carbon emission intensity of coal-fired power generation;

[0054] Carbon intensity conversion module: used to decompose the coal consumption of power supply into subsystems based on the energy utilization status of each system, and convert the coal consumption decomposition amount corresponding to the energy loss of each system into carbon intensity conversion;

[0055] Analysis module: Used to analyze the carbon intensity distribution under different load conditions and determine the variation law of carbon emission intensity of each system;

[0056] Improvement module: Used to analyze influencing factors based on the changing patterns of carbon emission intensity in each system, and propose improvement measures.

[0057] An electronic device according to the present invention includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the program to implement the steps of any of the methods described herein.

[0058] The present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of any of the methods described herein.

[0059] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention converts the carbon emission intensity of coal-fired power generation to each system and defines the conversion share of each system as the carbon conversion intensity. The carbon conversion intensity is used to measure the degree of influence of each system on the carbon emission intensity of coal-fired power generation, providing a basis for coal-fired power plants to formulate effective carbon reduction measures to reduce CO2 emissions, which is conducive to achieving green development. Attached Figure Description

[0060] Figure 1 This is a flowchart of the method of the present invention;

[0061] Figure 2 This invention relates to the carbon emission intensity of coal-fired power generation under different operating conditions. Detailed Implementation

[0062] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0063] like Figure 1 As shown, this embodiment of the invention provides a method for converting and analyzing the carbon emission intensity of coal-fired power generation, including the following steps:

[0064] S1. Obtain data on the carbon content and carbon oxidation rate per unit mass of coal, and the CO2 generation coefficient per unit standard coal consumption of the computer group.

[0065] S101. Obtain industrial analysis data for coal, including volatile matter content (VM), fixed carbon content (FC), and lower heating value (Q). net,ar The ash content (A) and moisture content (M) of coal are used to obtain the lower heating value (Q) of standard coal. net,ar ), lower heating value of coal (Q′) net,ar );

[0066] S102, Based on the lower heating value (Q) of standard coal in S101 net,ar ), lower heating value of coal (Q′) net,arThe carbon content (C) of a unit of standard coal is calculated by converting it into the mass of coal that can be burned according to the law of conservation of energy, and then multiplying the converted mass of coal by the carbon content of the coal on an as-received basis. ar );

[0067] S103, Obtaining slag production (G) Z ), carbon content in slag (C) Z ), fly ash production (G h ), carbon content in fly ash (C h ), coal consumption (F) c ), carbon content of coal And the calculation of dust collector efficiency and carbon oxidation rate (OF) M The formula is as follows:

[0068]

[0069] In the formula, G Z Slag production, in kg / s; G h Fly ash production, in kg / s; C Z The carbon content of slag is expressed in kg / s; C h F represents the carbon content of fly ash, expressed in kg / s. c The unit of measurement is the amount of coal consumed, expressed in kg / s; w(C) represents the carbon content of the coal by mass, expressed in %; η cc The efficiency of a dust collector is expressed in percent.

[0070] S104. Based on the carbon content per unit mass of coal (C m ) and carbon oxidation rate (OF M The CO2 generation coefficient (K) per unit of standard coal is calculated using the following formula:

[0071]

[0072] In the formula, K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; OF M This is the carbon oxidation rate per unit of standard coal, expressed as a percentage.

[0073] S2. Obtain coal consumption data for power generation from coal-fired units and calculate the carbon emission intensity of coal-fired power generation.

[0074] S201, Obtain the coal consumption for power supply of coal-fired units (b) cp,n )data;

[0075] S202, Based on the coal consumption for power supply of coal-fired units (b) cp,n The CO2 generation coefficient (K) per unit of standard coal is used to calculate the carbon emission intensity of coal-fired power generation.

[0076] S3. Based on the energy utilization status of each system, the coal consumption for power supply is decomposed into subsystems, and the coal consumption decomposition amount corresponding to the energy loss of each system is converted into carbon conversion intensity.

[0077] S301. Based on energy utilization, the coal consumption for power supply is subsystematically decomposed into plant power system, boiler system, pipeline system, steam turbine system, mechanical system, and generator system;

[0078] S302. Obtain the carbon equivalent intensity of the plant power system, using the following formula:

[0079]

[0080] In the formula, Carbon intensity of the plant power system, in g / kWh; ξ cp Plant power consumption rate, in percentage; b cp,n The coal consumption for power generation of the unit is expressed in g / kWh.

[0081] S303. Obtain the carbon equivalent intensity of the boiler system using the following formula:

[0082]

[0083] In the formula, The carbon equivalent intensity of flue gas heat loss q2 is expressed in g / kWh. The carbon-based intensity of the heat loss q3 due to incomplete combustion of gas is expressed in g / kWh. The carbon-based intensity of the heat loss q4 from incomplete combustion of solids is expressed in g / kWh. Carbon equivalent intensity for heat loss q5, in g / kWh; The carbon equivalent intensity of the physical heat loss q6 of ash residue is expressed in g / kWh. Carbon intensity of the boiler system, in g / kWh.

[0084] The carbon conversion intensity calculations for various losses in the boiler system are as follows:

[0085]

[0086] In the formula, K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; b cp,n Coal consumption for power generation of the unit, in g / (kWh); q x The various losses of the boiler are expressed as a percentage. For various losses in the boiler system q x Carbon intensity, expressed in g / (kWh).

[0087] S304. Obtain the carbon equivalent strength of the piping system using the following formula:

[0088]

[0089] In the formula, K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; b cp,n The coal consumption for power generation of the unit is expressed as a percentage; ξ cp Plant power consumption rate, in %; η b Boiler back-balance efficiency, in %; η p Pipeline efficiency, expressed as a percentage.

[0090] S305. Obtain the carbon equivalent intensity of the steam turbine system using the following formula:

[0091]

[0092] In the formula, K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; b cp,n The coal consumption for power generation of the unit is expressed in g / kWh; ξ cp Plant power consumption rate, in %; η b Boiler back-balance efficiency, in %; η p Pipeline efficiency, expressed as a percentage (%); η i The absolute internal efficiency of the steam turbine is expressed as a percentage (%).

[0093] S306. Obtain the carbon-converted strength of the mechanical system using the following formula:

[0094]

[0095] In the formula, K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; b cp,n The coal consumption for power generation of the unit is expressed in g / kWh; ξ cp Plant power consumption rate, in %; η b Boiler back-balance efficiency, in %; η p Pipeline efficiency, expressed as a percentage (%); η i η is the absolute internal efficiency of the steam turbine, expressed as a percentage (%). m Mechanical efficiency, expressed as a percentage.

[0096] S307. Obtain the carbon equivalent intensity of the generator system using the following formula:

[0097]

[0098] In the formula, K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; b cp,n The coal consumption for power generation of the unit is expressed in g / kWh; ξ cp Plant power consumption rate, in %; ηb Boiler back-balance efficiency, in %; η p Pipeline efficiency, expressed as a percentage (%); η i η is the absolute internal efficiency of the steam turbine, expressed as a percentage (%). m Mechanical efficiency, expressed as %; η g Generator efficiency, expressed as a percentage.

[0099] S4. Analyze the carbon conversion intensity distribution under different load conditions and determine the variation law of carbon emission intensity of each system;

[0100] S401. Analyze the historical data of a coal-fired unit under stable 40% load conditions, and study the distribution of carbon conversion intensity of each system and the law of change with the operating conditions; as shown in Table 4.

[0101] S402. Analyze the historical data of a coal-fired unit under stable 50% load conditions, and study the distribution of carbon conversion intensity of each system and the law of change with the operating conditions; as shown in Table 3.

[0102] S403. Analyze the historical data of a coal-fired unit under stable operating conditions at 75% load, and study the distribution of carbon conversion intensity of each system and the law of change with operating conditions; as shown in Table 2.

[0103] S403. Analyze the historical data of a coal-fired power unit under 100% load stable operating conditions, and study the distribution of carbon equivalent intensity of each system and its variation with operating conditions. As shown in Table 1.

[0104] Table 1. Carbon Emission Intensity Conversion for Coal-fired Power Generation at 100% Load

[0105]

[0106] Table 2. Carbon Emission Intensity Conversion for Coal-fired Power Generation at 75% Load

[0107]

[0108] Table 3. Carbon Emission Intensity Conversion for Coal-fired Power Generation at 50% Load

[0109]

[0110] Table 4. Carbon Emission Intensity Conversion for Coal-fired Power Generation at 40% Load

[0111]

[0112] Specifically, the present invention will be further illustrated below through an embodiment, which is a supercritical 1000MW coal-fired unit.

[0113] like Figure 2The example shown is based on the unit operating stably at 100% load. The steam turbine system has the highest carbon intensity, accounting for 45.73% of the carbon emission intensity of coal-fired power generation; followed by the boiler system and the plant auxiliary power system, with their carbon intensity accounting for 4.82% and 4.2% of the carbon emission intensity of coal-fired power generation, respectively; the mechanical system and the generator system have relatively low carbon intensity, with the sum of the two accounting for about 0.75% of the carbon emission intensity of coal-fired power generation.

[0114] When the unit load increases from 40% to 100%, the carbon equivalent intensity of the turbine system and the plant power system decreases by 91.81 g / kWh and 26.81 g / kWh respectively, showing significant changes. The carbon equivalent intensity of the boiler system is relatively stable, with a slight decrease after considering the influence of coal quality. The sum of the carbon equivalent intensities of the pipeline, mechanical, and generator systems decreases to some extent. Under all load levels, the carbon equivalent intensity of the turbine system is always the highest, followed by the plant power system or the boiler system.

[0115] S5. Analyze the influencing factors by examining the changing patterns of carbon emission intensity in each system, and propose improvement measures;

[0116] Depend on Figure 2 As shown, the system with the greatest impact on the carbon emission intensity of coal-fired power generation is the steam turbine system, followed by the plant auxiliary power system or boiler system. Among them, the carbon intensity of the steam turbine system and the plant auxiliary power system varies greatly with load, thus possessing significant potential for carbon emission reduction.

Claims

1. A method for converting and analyzing the carbon emission intensity of coal-fired power generation, characterized in that, Includes the following steps: (1) Obtain data on the carbon content and carbon oxidation rate per unit mass of coal, and the CO2 generation coefficient of the unit standard coal consumption of the computer group; (2) Obtain coal consumption data for power generation from coal-fired units and calculate the carbon emission intensity of power generation from coal-fired units; (3) The coal consumption for power supply is decomposed into subsystems based on the energy utilization status of each system, and the coal consumption decomposition amount corresponding to the energy loss of each system is converted into carbon conversion intensity. (4) Analyze the carbon equivalent intensity distribution under different load conditions and determine the variation law of carbon emission intensity of each system; (5) Analyze the influencing factors based on the carbon emission intensity change patterns of each system and propose improvement measures.

2. The method for converting and analyzing the carbon emission intensity of coal-fired power generation according to claim 1, characterized in that, Step (1) includes the following steps: (11) Obtain industrial analysis data for coal, including volatile matter content (VM), fixed carbon content (FC), and lower heating value (Q). net,ar The ash content (A) and moisture content (M) of coal are used to obtain the lower heating value (Q) of standard coal. net,ar ), lower heating value of coal (Q′) net,ar ); (12) Calculate the mass of coal corresponding to a unit of standard coal based on the law of conservation of energy, and calculate the carbon content (C) of a unit of standard coal based on the carbon content of the received coal. ar ); (13) Through slag production (G Z ), carbon content in slag (C) Z ), fly ash production (G h ), carbon content in fly ash (C h ), coal consumption (F) c The carbon content of the coal (w(C)) and the carbon oxidation rate (OF) calculated based on the dust collector efficiency are used to determine the carbon oxidation rate. M The formula is as follows: Among them, G Z Slag production, in kg / s; G h Fly ash production, in kg / s; C Z The carbon content of slag is expressed in kg / s; C h F represents the carbon content of fly ash, expressed in kg / s. c The unit of measurement is the amount of coal consumed, expressed in kg / s; w(C) represents the carbon content of the coal by mass, expressed in %; η cc The efficiency of a dust collector is expressed in percent. (14) Carbon content per unit mass (C) m ) and carbon oxidation rate (OF M The CO2 generation coefficient (K) per unit of standard coal is calculated using the following formula: Where K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; OF M This is the carbon oxidation rate per unit of standard coal, expressed as a percentage.

3. The method for converting and analyzing the carbon emission intensity of coal-fired power generation according to claim 1, characterized in that, Step (2) includes the following steps: (21) Obtain the coal consumption for power generation of coal-fired units (b) cp,n )data; (22) Based on the coal consumption for power generation of coal-fired units (b) cp,n The CO2 generation coefficient (K) per unit of standard coal is used to calculate the carbon emission intensity of coal-fired power generation.

4. The method for converting and analyzing the carbon emission intensity of coal-fired power generation according to claim 1, characterized in that, Step (3) includes the following steps: (31) The coal consumption for power supply is broken down into the plant power system, boiler system, pipeline system, steam turbine system, mechanical system and generator system; (32) Obtain the carbon equivalent intensity of the plant power system using the following formula: in, Carbon intensity of the plant power system, in g / kWh; ξ cp Plant power consumption rate, in percentage; b cp,n The coal consumption for power generation of the unit is expressed in g / kWh. (33) Obtain the carbon equivalent intensity of the boiler system, which is the sum of the carbon equivalent intensity of each component loss, as shown in the following formula: in, The carbon equivalent intensity of flue gas heat loss q2 is expressed in g / kWh. The carbon-based intensity of the heat loss q3 due to incomplete combustion of gas is expressed in g / kWh. The carbon-based intensity of the heat loss q4 from incomplete combustion of solids is expressed in g / kWh. Carbon equivalent intensity for heat loss q5, in g / kWh; The carbon equivalent intensity of the physical heat loss q6 of ash residue is expressed in g / kWh. Carbon intensity of the boiler system, in g / kWh; (34) Obtain the carbon equivalent intensity of the pipeline system using the following formula: Where K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; b cp,n Coal consumption for power generation of the unit, expressed as a percentage; ξ cp Plant power consumption rate, in %; η b Boiler back-balance efficiency, in %; η p Pipeline efficiency, expressed as a percentage. (35) Obtain the carbon equivalent intensity of the steam turbine system using the following formula: Where K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; b cp,n The coal consumption for power generation of the unit is expressed in g / kWh; ξ cp Plant power consumption rate, in %; η b Boiler back-balance efficiency, in %; η p Pipeline efficiency, expressed as a percentage (%); η i The absolute internal efficiency of the steam turbine is expressed as a percentage (%). (36) Obtain the carbon equivalent strength of the mechanical system using the following formula: Where K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; b cp,n The coal consumption for power generation of the unit is expressed in g / kWh; ξ cp Plant power consumption rate, in %; η b Boiler back-balance efficiency, in %; η p Pipeline efficiency, expressed as a percentage (%); η i η is the absolute internal efficiency of the steam turbine, expressed as a percentage (%). m Mechanical efficiency, expressed as a percentage. (37) Obtain the carbon equivalent intensity of the generator system using the following formula: Where K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; b cp,n The coal consumption for power generation of the unit is expressed in g / kWh; ξ cp Plant power consumption rate, in %; η b Boiler back-balance efficiency, in %; η p Pipeline efficiency, expressed as a percentage (%); η i η is the absolute internal efficiency of the steam turbine, expressed as a percentage (%). m Mechanical efficiency, expressed as %; η g Generator efficiency, expressed as a percentage.

5. The method for converting and analyzing the carbon emission intensity of coal-fired power generation according to claim 4, characterized in that, The boiler system's component losses include flue gas heat loss q2, incomplete gas combustion loss q3, incomplete solid combustion loss q4, heat dissipation loss q5, and ash and slag physical heat loss q6, as shown in the following formulas: Where K is the CO2 generation coefficient per unit standard coal, with units of tCO2 / tce; b cp,n Coal consumption for power generation of the unit, in g / kWh; q x The various losses of the boiler are expressed as a percentage. For various losses in the boiler system q x Carbon intensity, expressed in g / kWh.

6. The method for converting and analyzing the carbon emission intensity of coal-fired power generation according to claim 1, characterized in that, Step (4) includes the following steps: (41) Analyze the distribution and variation of carbon equivalent intensity of each system under 30%-40% load conditions; (42) Analyze the distribution and variation law of carbon equivalent intensity of each system under 50%-60% load conditions; (43) Analyze the distribution and variation law of carbon equivalent intensity of each system under 70%-80% load conditions; (44) Analyze the distribution and variation of carbon equivalent intensity of each system under 90%-100% load conditions.

7. The method for converting and analyzing the carbon emission intensity of coal-fired power generation according to claim 6, characterized in that, Step (5) is as follows: Identify the systems that have a significant impact on the carbon emission intensity of coal-fired power generation by analyzing the relationship between the carbon emission intensity of coal-fired power generation and the unit load, conduct carbon emission reduction potential analysis and formulate improvement measures.

8. A system for converting and analyzing the carbon emission intensity of coal-fired power generation, characterized in that, include: Generation coefficient module: used to obtain data on carbon content and carbon oxidation rate per unit mass of coal, and CO2 generation coefficient per unit standard coal consumption of the computer group; Carbon emission intensity module: used to acquire coal consumption data for power generation from coal-fired units and calculate the carbon emission intensity of coal-fired power generation; Carbon intensity conversion module: used to decompose the coal consumption of power supply into subsystems based on the energy utilization status of each system, and convert the coal consumption decomposition amount corresponding to the energy loss of each system into carbon intensity conversion; Analysis module: Used to analyze the carbon intensity distribution under different load conditions and determine the variation law of carbon emission intensity of each system; Improvement module: Used to analyze influencing factors based on the changing patterns of carbon emission intensity in each system, and propose improvement measures.

9. An electronic device, characterized in that, It includes a memory and a processor, the memory storing a computer program, and the processor executing the program to implement the steps of the method according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The device contains a computer program that, when executed by a processor, implements the steps of the method according to any one of claims 1-7.

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