Natural gas excess pressure power generation datum line emission calculation method, storage medium and calculation device

Abstract

The invention relates to the field of natural gas excess pressure power generation, and discloses a natural gas excess pressure power generation datum line emission calculation method, a storage medium and a calculation device. The invention discloses a natural gas excess pressure power generation reference line emission calculation method, which comprises the following steps: determining a calculation time period of a reference line emission amount, the calculation time period comprising a plurality of time units; determining a time correlation factor according to each time unit; and determining the reference line emission amount of the calculation time period based on the reference line emission amount of the time unit in combination with the time correlation factor. The reference line emission can be calculated more accurately, it is avoided that calculation / prediction is inaccurate due to annual average, prediction and accounting of the real emission are affected, a more reasonable pressure control method is designed on the basis of carbon emission, and the carbon emission is further reduced.

Description

Technical Field

[0001] The present invention relates to the field of natural gas excess pressure power generation, and in particular to a natural gas excess pressure power generation baseline emission calculation method, storage medium and calculation device. Background Art

[0002] The residual pressure power generation technology is a technology that utilizes the pressure difference energy generated in industrial production, recycles it into mechanical energy, and drives the generator to generate electricity. Natural gas residual pressure power generation technology fully utilizes the pressure energy of natural gas to generate electricity. This technology can effectively solve the problems of pipeline vibration, noise, and ice blockage caused by rapid cooling during the natural gas pressure regulation process. It fully utilizes the internal energy of natural gas without generating pollution and meets the zero emission standard. The baseline emissions of natural gas residual pressure power generation refer to the greenhouse gas emissions of coal, oil, natural gas and other power generation replaced by natural gas residual pressure power generation.

[0003] Electricity is obtained from identified power plants or grids and baseline emissions can be calculated as follows:

[0004]

[0005] Among them: BE elec,y ——Baseline emissions due to replacement electricity in year y, tCO2

[0006] f cap - Factor used to determine the amount of energy that could be generated using historical levels of waste energy in project year y, expressed as a proportion of the total energy generated using waste energy sources in year y; if the waste energy generated in project year y is equal to or less than historical levels, the ratio is 1

[0007] f wcm ——The proportion of electricity generated by the use of waste energy in project activities; if electricity is generated purely by waste energy, the proportion is 1

[0008] EG i,j,y - the amount of electricity supplied to user j from the i-th electricity source (i can be the grid or an identified existing power source) in year y in the absence of project activities, in MWh;

[0009] EF elec,i,j,y ——The emission factor of the electricity source i (i = gr (grid) or i = is (identified existing power source)) replaced by the project activity in year y, usually the carbon dioxide emission factor, expressed in CO2 / MWh

[0010] When the recipient of the electricity generated by the project activity is the grid only or the electricity replaced by the user is provided solely by the connected grid system, and the grid is certified as the electricity baseline, the carbon dioxide emission factor EF elec,i,j,yIt should be determined according to the "Electric Power System Emission Factor Calculation Tool", otherwise the carbon dioxide emission factor is determined according to the following formula:

[0011]

[0012] Among them, EF CO2,i,j - CO2 emission factor per unit of energy of the fossil fuel used in the baseline electricity source i, expressed in tCO2 / TJ, obtained from reliable local or national data if available, otherwise taken from the IPCC default emission factors relevant to the specific country

[0013] η plant,j ——the full-plant efficiency of the identified existing power plant that would be used by the jth user in the absence of the project activity

[0014] 3.6*10-3——Conversion coefficient, measured in TJ / MWh.

[0015] When the project activity replaces the imported grid electricity and the identified existing power plants, the baseline emission factor shall reflect the emission intensity of the grid and the identified existing power sources under the baseline scenario, that is, the weighted average emission factor of the replaced electricity is calculated based on the above-mentioned relevant historical values. If historical information is considered inappropriate for the original determination of the relative proportions of the two power sources used under the baseline (for example, for various reasons, such as the use of inaccurate or uncalibrated monitoring equipment, resulting in unreliable available data), the most conservative emission factor of the two shall be used.

[0016] If more than one fossil fuel is used in the identified existing power plants in the baseline scenario, the relative contribution of each fuel to the total output shall be considered and the baseline emissions formula shall be adjusted accordingly. The relative contribution shall be determined based on the historical data referred to in paragraph 9 above. The efficiency of the identified existing power plants shall be determined based on the latest version of the “Tool for Determining Baseline Efficiency for Thermal or Electrical Energy Production Systems”.

[0017] In actual production life, the production demand of natural gas will change over time. The changing trends can be as follows:

[0018] As economic development progresses, the demand for natural gas will increase every year;

[0019] Natural gas consumption varies in different seasons / months within a year, with high demand in the peak season and low demand in the off-season;

[0020] The natural dosage also varies during the day and night.

[0021] On the other hand, the amount of surplus power generation used will also change over time (corresponding to parameter EG i,j,y ):

[0022] As economic development progresses, electricity demand will increase every year;

[0023] The same equipment uses different amounts of electricity in different seasons / months / days and nights;

[0024] The same equipment has different power consumption in different seasons / months;

[0025] For power plants, the economic benefits corresponding to different seasons and time periods are also different. In combination with the above aspects, the existing baseline calculation method uses the year as the base time unit, which leads to the following problems:

[0026] Using the year as the base unit cannot accurately reflect the greenhouse gas emission reduction caused by surplus pressure power generation;

[0027] Calculations based on the base year cannot reflect the actual carbon emissions in finer time units (seasons, months, hours) because the time scale is too large, resulting in inaccurate calculations / forecasts due to the annual average. Summary of the invention

[0028] The technical problem to be solved by the present invention is to provide a more accurate natural gas residual pressure power generation baseline emission calculation design method, calculation method, storage medium and calculation device.

[0029] The method for calculating the baseline emission of natural gas residual pressure power generation disclosed in the present invention includes:

[0030] Determine a calculation time period for baseline emissions, wherein the calculation time period includes a plurality of time units;

[0031] Determining a time-related factor according to each time unit;

[0032] The baseline emission amount for the calculation time period is determined based on the baseline emission amount of the time unit in combination with the time-related factor.

[0033] Preferably, the determination of the baseline emissions of the time unit includes at least one of the following factors:

[0034] The factor for the energy that could be generated using waste energy at historical levels, the proportion of electricity generated by the project activity using waste energy, the amount of electricity that the electricity source would supply to users in the absence of the project activity, and the emission factors of the electricity source replaced by the project activity.

[0035] Preferably, the calculation time period is one year, half a year, one quarter, one month, one week or one day.

[0036] Preferably, the multiple time units include:

[0037] Time units divided into quarters;

[0038] and / or,

[0039] Time units divided into months;

[0040] and / or,

[0041] Time units divided into weeks;

[0042] and / or,

[0043] A unit of time divided by the time of day.

[0044] Preferably, at least one of the time-related factors corresponding to each of the time units is different.

[0045] Preferably, the time-dependent factor is a multiplicative factor.

[0046] Preferably, the baseline emissions meet the following requirements:

[0047]

[0048] or

[0049] BE elec,y =∑ z ∑ j ∑ i (α y,z *f cap,z *f wcm,z *EG i,j,y,z *EF Elec,i,j,y,z )

[0050] or

[0051] BE elec,y =∑ z α y,z *BE elec,y,z

[0052]

[0053] Where y represents the calculation time period, z represents the time unit, i represents the replaced power source, and j represents the user;

[0054] BE elec,y represents the baseline emissions for calculation period y;

[0055] α y,z represents the adjustment factor, α y,z The length of time corresponding to time unit z in year y, α y,z ≤1 and α y,z ≥0;

[0056] f cap,zThe factor representing the energy that can be generated using historical levels of waste energy in the zth time unit in the yth year of the project;

[0057] f wcm,z It represents the proportion of electricity generated by waste energy in the project activity in the zth time unit of the yth year;

[0058] EG i,j,y,z It means calculating the amount of electricity supplied from the i-th power source to user j in the z-th time unit in time period y without project activities;

[0059] EF Elec,i,j,y,z represents the emission factor of electricity source i that is replaced by the project activity for z time units in the calculation period y;

[0060] BE elec,y,z Denotes the baseline emissions for the zth time unit in calculation period y.

[0061] Preferably, the time-dependent factor is an additive compensation factor.

[0062] Preferably, the annual baseline emissions meet the following requirements:

[0063]

[0064] or

[0065]

[0066] or

[0067]

[0068] Where y represents the calculation time period, z represents the time unit, i represents the replaced power source, and j represents the user;

[0069] BE elec,y represents the baseline emissions for calculation period y;

[0070] f cap A factor representing the energy that could be generated using historical levels of waste energy for calculation period y;

[0071] f wcm It represents the proportion of electricity generated by waste energy in project activities during calculation period y;

[0072] EG i,j,y It represents the amount of electricity supplied from the i-th power source to the receiving user j in the calculation period y without project activities;

[0073] EF Elec,i,j,y represents the emission factor of electricity source i replaced by the project activity in calculation period y;

[0074] OE elec,y,z represents the baseline emission offset for the zth time unit in the calculation period y;

[0075] f cap,z A factor representing the energy that can be generated using the historical level of waste energy in the zth time unit of the calculation period y;

[0076] f wcm,z It represents the proportion of electricity generated by the project activity using waste energy in the zth time unit of the calculation period y;

[0077] EG i,j,y,z It means calculating the amount of electricity supplied from the i-th power source to user j in the z-th time unit in time period y without project activities;

[0078] EF Elec,i,j,y,z represents the emission factor of electricity source i that is replaced by the project activity in the zth time unit in the calculation period y.

[0079] Preferably, the baseline emission offset of the zth time unit in the calculation time period y satisfies:

[0080]

[0081] Among them, β y,z represents the adjustment factor, β y,z The length of time that the corresponding time unit z is in the calculation period y and the deviation of this time unit from the annual average value, β y,z ≤1 and β y,z ≥ -1,

[0082] EG i,j,y,z It means calculating the amount of electricity supplied from the ith power source to user j in the zth time unit in time period y without project activities.

[0083] EF Elec,i,j,y,z represents the emission factor of electricity source i that is replaced by the project activity in the zth time unit in the calculation period y.

[0084] Preferably, the f cap,z satisfy:

[0085]

[0086] or

[0087]

[0088] or

[0089]

[0090] Among them, Q WCM,BL Represents the average amount of waste energy media discharged in the three years before the project started;

[0091] Q WCM,y,z represents the amount of waste energy medium used for energy generation in the zth time unit of the calculation period y;

[0092] P WCM,y,z represents the average pressure of the waste energy medium in the zth time unit of the calculation period y;

[0093] P WCM,BL Indicates the average pressure of waste energy media in the three years before the implementation of the project activity;

[0094] P ref Indicates the base pressure of the waste energy medium;

[0095] d wcm,y,z represents the average density of the waste energy medium at the actual temperature and pressure of the z-th time unit in the calculation period y;

[0096] d wcm,BL Represents the average density of the waste energy medium at actual temperature and pressure in the three years prior to the implementation of the project activity;

[0097] Q OE,BL Indicates the final / intermediate maximum theoretical energy value that can be recovered;

[0098] Q OE,y,z Indicates the final / intermediate energy actually recovered by the z-th time unit in the calculation period y.

[0099] Preferably, the f wcm,z satisfy:

[0100]

[0101] Wherein, z represents the number of hours of the zth time unit in the calculation time period y;

[0102] Q WCM，h It represents the amount of waste energy medium recovered in time h;

[0103] Cp wcm represents the specific heat of the waste energy medium;

[0104] t wcm,h represents the temperature of the waste energy medium in time h;

[0105] t ref Indicates the reference temperature;

[0106] NCV WCM,y,zrepresents the net calorific value of the waste energy medium in the zth time unit of the calculation period y;

[0107] Q i,h It represents the consumption of each fuel in time h;

[0108] Cp i represents the specific heat of waste energy medium i;

[0109] t i,h represents the temperature of each fuel in time h;

[0110] NCV i Represents the average net calorific value of waste energy media and each fuel.

[0111] The storage medium disclosed in the present application stores a computer program, and when the computer program is executed by a processor, the method for calculating the baseline emissions of natural gas residual pressure power generation is implemented.

[0112] The natural gas excess pressure power generation baseline emission calculation device disclosed in the present application includes a storage medium, the storage medium stores a computer program, and when the computer program is executed by a processor, it implements the natural gas excess pressure power generation baseline emission calculation method as described in any one of claims 1 to 13.

[0113] The beneficial effects of the present invention are: compared with the existing baseline emission calculation method, the present application divides the time unit for calculation more finely, and at the same time, by adjusting the time-related factors of the baseline emissions that change with the time unit, the baseline emissions can be calculated more accurately, avoiding inaccurate calculations / forecasts due to annual averages, affecting the prediction and accounting of actual emissions, which is conducive to designing a more reasonable pressure control method based on carbon emissions and further reducing carbon emissions. DETAILED DESCRIPTION

[0114] The present invention is further described below.

[0115] The present invention discloses:

[0116] Determine a calculation time period for baseline emissions, wherein the calculation time period includes a plurality of time units;

[0117] Determining a time-related factor according to each time unit;

[0118] The baseline emission amount for the calculation time period is determined based on the baseline emission amount of the time unit in combination with the time-related factor.

[0119] The existing baseline emissions are usually directly calculated on an annual basis. Based on the reasons mentioned above, it is difficult to obtain accurate calculation results by direct annual calculation. Therefore, this application divides the calculation time period into more refined multiple time units. The division of time units can be based on the natural dates in the calculation time period, for example, a year is divided into 12 months; it can also be based on the changes in baseline emissions, for example, a year is divided into at least one peak period and at least one flat peak period and a trough period. On the basis of using the baseline emissions of the time unit to calculate the baseline emissions of the total calculation time period, the application also introduces a time-related factor, and uses the time-related factor to adjust the baseline emissions of the calculated time unit, so as to obtain a more accurate result. The calculation method of the present application can be executed by one unit alone, or it can be jointly participated by multiple parties, for example, it can be a natural gas-related enterprise, an emission purchasing unit or a target customer, and a national unit. The time unit can be specified by any party or determined by joint negotiation. Through the method of the present invention, it is possible to arrange excess pressure power generation and excess pressure regulation in the most economical way, so as to maximize the economic benefits of each participating relevant unit.

[0120] The calculation of the baseline emission amount of the time unit can refer to the existing baseline emission amount calculation method. Therefore, generally speaking, the determination of the baseline emission amount of the time unit includes at least one of the following factors:

[0121] The factors of energy that can be generated using waste energy at historical levels, the proportion of electricity generated using waste energy in project activities, the amount of electricity supplied to users by the power source in the absence of project activities, and the emission factors of the power sources replaced by project activities. Among them, the proportion of electricity generated using waste energy in project activities and the amount of electricity supplied to users by the power source in the absence of project activities are relatively easy to understand, while the factors of energy that can be generated using waste energy at historical levels are usually expressed as the proportion of energy produced by waste energy at historical levels in project activities to total energy production, and the emission factors of power sources replaced by project activities are the amount of carbon dioxide emissions divided by the amount of electricity. The specific determination and calculation of these factors will be explained later.

[0122] Although generally speaking, the calculation period is one year, the calculation period can also be half a year, a quarter, a month, a week or a day. For a shorter calculation period, after completing the calculation of a calculation period, the calculation period can be used as the time unit of another larger calculation period to calculate the baseline emissions of another calculation period.

[0123] Accordingly, the multiple time units may include:

[0124] Time units divided into quarters;

[0125] and / or,

[0126] Time units divided into months;

[0127] and / or,

[0128] Time units divided into weeks;

[0129] and / or,

[0130] A unit of time divided by the time of day.

[0131] Among them, the calculation time period corresponding to the time unit divided by quarter can be one year or half a year, the calculation time period corresponding to the time unit divided by month can be one year, half a year or one quarter; the calculation time period corresponding to the time unit divided by week can be one year, half a year, one quarter, one month or one week; the calculation time period corresponding to the time unit divided by day can be one year, half a year, one quarter, one month, one week or one day. In fact, the above division methods do not have to be used alone, and multiple methods can also be used in combination, for example, some time units are divided by quarters, and some time units are divided by months.

[0132] In the specific division process of time units, it is also possible to divide the time units based on the division of natural dates in combination with the changes in factors that affect the baseline emissions. The factors that affect the baseline emissions include the natural gas demand, the amount of surplus pressure power generation used, the economic benefits corresponding to different seasons and time periods, etc. as described in the background technology. Because the changes in the factors that affect the baseline emissions are combined, in the preferred embodiment of the present application, at least one of the time-related factors corresponding to each of the time units is different. This includes situations where the time-related factors corresponding to some time units are the same, while the time-related factors corresponding to some time units are different, and the time-related factors corresponding to all time units are different. For this situation, by adjusting the time-related factors, the differences between the time units can be more accurately reflected, thereby obtaining a more accurate calculation result.

[0133] The following example illustrates the method for calculating the baseline emissions of natural gas excess pressure power generation in this application.

[0134] The time-related factor of the baseline emission volume changing with the time unit can adopt a multiplicative factor, and the baseline emission calculation is adjusted by multiplying the multiplicative factor. The so-called multiplicative factor is a time-related factor that uses a product relationship to adjust the baseline emission volume of the time unit. The specific implementation method of using the multiplicative factor is as follows:

[0135] In a preferred embodiment of the present application, the calculation of annual baseline emissions with a multiplicative factor and time-dependent may be performed using the following formula:

[0136]

[0137] Among them, y represents the calculation time period, z represents the time unit, i represents the replaced power source, and j represents the user. In the formula, z, i, and j mainly play the role of indexes;

[0138] BE elec,y represents the baseline emissions for calculation period y;

[0139] α y,z represents the adjustment factor, α y,z The length of time that the corresponding time unit z is in the calculation time period y, α y,z ≤1 and α y,z ≥0, for example, y is a natural year, if a time unit is 3 months (i.e., a quarter), if the time unit z is in the yth year for 1 month, and the other 2 months are in the y-1th year (or y+1th year), then the corresponding α y,z =1 / 3. For another example, if the time of a time unit is all in the yth year, then the corresponding α y,z =1.

[0140] f cap,z The factor that represents the energy that can be generated by using the historical level of waste energy for the zth time unit of the project calculation period y,

[0141] f wcm,z It represents the proportion of electricity generated by waste energy in the project activity in the zth time unit of the calculation period y.

[0142] EG i,j,y,z It means calculating the amount of electricity supplied from the ith power source to user j in the zth time unit in time period y without project activities.

[0143] EF Elec,i,j,y,z represents the emission factor of power source i for z time units in calculation period y.

[0144] In another preferred embodiment of the present application, the calculation of the annual baseline emissions related to time using a multiplicative factor can be performed using the following formula:

[0145]

[0146] The meaning of each parameter is consistent with that in the above embodiment.

[0147] In another preferred embodiment of the present application, the calculation of the annual baseline emissions related to time using a multiplicative factor can be performed using the following formula:

[0148]

[0149]

[0150] Among them, BE elec,y It represents the baseline emission in the calculation period y, and the meanings of other parameters are consistent with those in the above embodiment, and the same is true for the following embodiments.

[0151] f cap,z The factor that represents the energy that can be generated by using the historical level of waste energy in the zth time unit of the project calculation period y, for f cap,z If relevant data is available, then f cap,z satisfy:

[0152]

[0153] Among them, Q WCM,BL It indicates the average amount of waste energy media (combustion or exhaust gas) emitted in the three years before the start of the project, kg;

[0154] Q WCM,y,z The amount of waste energy medium used for energy generation in the zth time unit of the calculation period y, kg;

[0155] P WCM,y,z Indicates the average pressure of the waste energy medium in the zth time unit of the calculation period y, kg / m 2 (a);

[0156] P WCM,BL Indicates the average pressure of waste energy media in the three years before the implementation of the project activity, kg / m 2 (a);

[0157] P ref Indicates the reference pressure (ambient pressure) of the waste energy medium, kg / m 2 ;

[0158] d wcm,y,z The average density of the waste energy medium at the actual temperature and pressure in the zth time unit of the calculation period y, kg / m 3 ;

[0159] d wcm,BL It represents the average density of waste energy media at actual temperature and pressure three years before the implementation of the project activity, kg / m3.

[0160] If it is a new project or data for existing facilities are unavailable, then f cap,z satisfy:

[0161]

[0162] The project participants prove that the residual heat / pressure cannot be directly monitored. cap,z satisfy:

[0163]

[0164] Q OE,BL represents the final / intermediate maximum theoretical energy value that can be recovered, TJ;

[0165] Q OE,y,z It represents the final / intermediate energy actually recovered by the z-th time unit in the calculation period y, TJ.

[0166] f wcm,z It represents the proportion of electricity generated by waste energy in the project activity in the zth time unit of the calculation period y. If waste energy media and fossil fuels are used to generate electricity and supply electricity, f wcm,z satisfy:

[0167]

[0168] Wherein, z represents the number of hours of the z-th time unit in the calculation time period y. The time unit is M seasons, N months, K days, or L hours, where M is less than 4, N is less than 12, K is less than 31, and L is less than 24.

[0169] Q WCM，h It represents the amount of waste energy medium recovered in time h;

[0170] Cp wcm represents the specific heat of the waste energy medium;

[0171] t wcm,h represents the temperature of the waste energy medium in time h;

[0172] t ref Indicates the reference temperature;

[0173] NCV WCM,y,z represents the net calorific value of the waste energy medium in the zth time unit of the calculation period y;

[0174] Q i,h Indicates the consumption of each fuel (waste energy medium or other fuel) in time h;

[0175] Cp i represents the specific heat of waste energy medium i;

[0176] t i,h represents the temperature of each fuel in time h;

[0177] NCV i Represents the average net calorific value of waste energy media and each fuel.

[0178] In addition to the multiplicative factor, the time-related factor of the baseline emission volume changing with the time unit can also use the additive compensation factor. The baseline emission calculation is adjusted by adding the additive compensation factor. The specific implementation method of using the additive compensation factor is as follows:

[0179] In a preferred embodiment of the present application, the annual baseline emissions using the additive compensation factor meet the following requirements:

[0180]

[0181] Among them, OE elec,y,z It indicates the baseline emission offset of the zth time unit in the calculation period y. The meaning of the remaining parameters is the same as the above content. The abnormal correction is made through the baseline emission offset of each time unit, so as to correct the calculation of the annual baseline emissions.

[0182] In another preferred embodiment of the present application, the annual baseline emissions using the additive compensation factor meet the following requirements:

[0183]

[0184] In order to facilitate calculation and data acquisition, f cap and f wcm Calculate, that is

[0185]

[0186] OE elec,y,z It represents the baseline emission offset of the zth time unit in the calculation period y. The specific calculation can be done using the following formula:

[0187]

[0188] Among them, β y,z represents the adjustment factor, β y,z The length of time that the corresponding time unit z is in the calculation period y and the deviation of this time unit from the annual average value, β y,z ≤1 and β y,z ≥-1. For example, y is a natural year, if a time unit is 3 months (i.e. a quarter), if the time unit z is in the yth year for 1 month, and the other 2 months are in the y-1st year (or y+1st year); and the emission corresponding to this time unit is in the off-season, which is 1 / 10 lower than the average value; then the corresponding

[0189] Specifically, y is a natural year, if a time unit is 3 months (i.e., a quarter), if the time unit z is in the yth year for 1 month, and the other 2 months are in the y-1st year (or y+1st year); and the emission corresponding to this time unit is in the peak season, which is 1 / 10 higher than the average value; then the corresponding

[0190] In actual operation, the natural gas excess pressure power generation baseline emissions can be calculated directly using the above method, or a computer program can be programmed according to the above method, the computer program is stored in a storage medium, and then executed by a processor to implement the natural gas excess pressure power generation baseline emissions calculation method.

Claims

1. A method for calculating baseline emissions of natural gas residual pressure power generation, characterized in that: include: Determine a calculation time period for baseline emissions, wherein the calculation time period includes a plurality of time units; Determining a time-related factor according to each time unit; The baseline emission amount for the calculation time period is determined based on the baseline emission amount of the time unit in combination with the time-related factor.

2. The method for calculating the baseline emissions of natural gas residual pressure power generation according to claim 1, characterized in that: The determination of the baseline emissions for the time unit includes at least one of the following factors: The factor for the energy that could be generated using waste energy at historical levels, the proportion of electricity generated by the project activity using waste energy, the amount of electricity that the electricity source would supply to users in the absence of the project activity, and the emission factors of the electricity source replaced by the project activity.

3. The method for calculating the baseline emissions of natural gas residual pressure power generation according to claim 1, characterized in that: The calculation time period is one year, half a year, one quarter, one month, one week or one day.

4. The method for calculating the baseline emissions of natural gas residual pressure power generation according to claim 1 or 3, characterized in that: The multiple time units include: Time units divided into quarters; and / or, Time units divided into months; and / or, Time units divided into weeks; and / or, A unit of time divided by the time of day.

5. The method for calculating the baseline emissions of natural gas residual pressure power generation according to claim 1, characterized in that: At least one of the time-related factors corresponding to the time units is different.

6. The method for calculating the baseline emissions of natural gas residual pressure power generation according to claim 1, characterized in that: The time-dependent factor is a multiplicative factor.

7. The method for calculating the baseline emissions of natural gas residual pressure power generation according to claim 6, characterized in that: The baseline emissions meet the following requirements: or BE elec,y =∑ z ∑ j ∑ i (α y,z *f cap,z *f wcm,z *EG i,j,y,z *EF Elec,i,j,y,z ) or THEY elec,y ∑ z α y,z *THEY elec,y,z Where y represents the calculation time period, z represents the time unit, i represents the replaced power source, and j represents the user; BE elec,y represents the baseline emissions for calculation period y; α y,z represents the adjustment factor, α y,z The length of time corresponding to time unit z in year y, α y,z ≤1 and α y,z ≥0; f cap,z The factor representing the energy that can be generated using historical levels of waste energy in the zth time unit in the yth year of the project; f wcm,z It represents the proportion of electricity generated by waste energy in the project activity in the zth time unit of the yth year; EG i,j,y,z It means calculating the amount of electricity supplied from the i-th power source to user j in the z-th time unit in time period y without project activities; EF Elec,i,j,y,z represents the emission factor of electricity source i that is replaced by the project activity for z time units in the calculation period y; BE elec,y,z Denotes the baseline emissions for the zth time unit in calculation period y.

8. The method for calculating the baseline emissions of natural gas residual pressure power generation according to claim 1, characterized in that: The time-dependent factor is an additive compensation factor.

9. The method for calculating the baseline emissions of natural gas residual pressure power generation according to claim 8, characterized in that: Annual baseline emissions meet: or or Where y represents the calculation time period, z represents the time unit, i represents the replaced power source, and j represents the user; BE elec,y represents the baseline emissions for calculation period y; f cap A factor representing the energy that could be generated using historical levels of waste energy for calculation period y; f wcm It represents the proportion of electricity generated by waste energy in project activities during calculation period y; EG i,j,y It represents the amount of electricity supplied from the i-th power source to the receiving user j in the calculation period y without project activities; EF Elec,i,j,y represents the emission factor of electricity source i replaced by the project activity in calculation period y; OE elec,y,z represents the baseline emission offset for the zth time unit in the calculation period y; f cap,z A factor representing the energy that can be generated using the historical level of waste energy in the zth time unit of the calculation period y; f wcm,z It represents the proportion of electricity generated by the project activity using waste energy in the zth time unit of the calculation period y; EG i,j,y,z It means calculating the amount of electricity supplied from the i-th power source to user j in the z-th time unit in time period y without project activities; EF Elec,i,j,y,z represents the emission factor of electricity source i that is replaced by the project activity in the zth time unit in the calculation period y.

10. The method for calculating the baseline emissions of natural gas residual pressure power generation according to claim 9, characterized in that: The baseline emission offset of the zth time unit in the calculation time period y satisfies: Among them, β y,z represents the adjustment factor, β y,z The length of time that the corresponding time unit z is in the calculation period y and the deviation of this time unit from the annual average value, β y,z ≤1 and β y,z ≥ -1, EG i,j,y,z It means calculating the amount of electricity supplied from the ith power source to user j in the zth time unit in time period y without project activities. EF Elec,i,j,y,z represents the emission factor of electricity source i that is replaced by the project activity in the zth time unit in the calculation period y.

11. The method for calculating the baseline emissions of natural gas residual pressure power generation according to claim 7 or 9, characterized in that: The f cap,z satisfy: or or Among them, Q WCM,BL Represents the average amount of waste energy media discharged in the three years before the project started; Q WCM,y,z represents the amount of waste energy medium used for energy generation in the zth time unit of the calculation period y; P WCM,y,z represents the average pressure of the waste energy medium in the zth time unit of the calculation time period y; P WCM,BL Indicates the average pressure of waste energy media in the three years before the implementation of the project activity; P ref Indicates the base pressure of the waste energy medium; d wcm,y,z represents the average density of the waste energy medium at the actual temperature and pressure of the z-th time unit in the calculation period y; d wcm,BL Represents the average density of the waste energy medium at actual temperature and pressure in the three years prior to the implementation of the project activity; Q OE,BL Indicates the final / intermediate maximum theoretical energy value that can be recovered; Q OE,y,z Indicates the final / intermediate energy actually recovered by the z-th time unit in the calculation period y.

12. The method for calculating the baseline emissions of natural gas residual pressure power generation according to claim 7 or 9, characterized in that: The f wcm,z satisfy: Wherein, z represents the number of hours of the zth time unit in the calculation time period y; Q WCM，h It represents the amount of waste energy medium recovered in time h; Cp wcm represents the specific heat of the waste energy medium; t wcm,h It represents the temperature of the waste energy medium in time h; t ref Indicates the reference temperature; NCV WCM,y,z represents the net calorific value of the waste energy medium in the zth time unit of the calculation period y; Q i,h It represents the consumption of each fuel in time h; Cp i represents the specific heat of waste energy medium i; t i,h represents the temperature of each fuel in time h; NCV i Represents the average net calorific value of waste energy media and each fuel.

13. A storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for calculating the baseline emissions of natural gas residual pressure power generation according to any one of claims 1 to 12 is implemented.

14. A natural gas residual pressure power generation baseline emission calculation device, characterized in that: A storage medium is included, wherein the storage medium stores a computer program, and when the computer program is executed by a processor, the method for calculating the baseline emissions of natural gas residual pressure power generation according to any one of claims 1 to 12 is implemented.

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