Zero carbon emission accounting method for transformer substation

Abstract

The invention discloses a transformer substation zero-carbon emission accounting method, which relates to the technical field of transformer substation zero-carbon emission, and comprises the following steps: adopting a new energy system to provide electric energy for electric equipment and internet equipment in a transformer substation, and adopting a natural ester insulating oil transformer to replace a mineral oil transformer; environment-friendly gas insulation metal closed combination equipment is adopted to replace sulfur hexafluoride metal closed combination equipment; and when the reduced carbon emission of power generation of the new energy system in the transformer substation is greater than the increased carbon emission of the load in the transformer substation, the zero carbon emission target is realized in the operation stage in the transformer substation. The method is reasonable in design, green equipment such as a natural ester insulating oil transformer and environment-friendly gas insulating metal closed combination equipment is adopted as electrical equipment, and carbon emission is not generated in the operation stage of the transformer substation. Meanwhile, when the reduced carbon emission of power generation of the new energy system in the transformer substation is larger than the increased carbon emission of the load in the transformer substation, the zero carbon emission target is achieved in the operation stage in the transformer substation.

Description

Technical Field

[0001] The present invention relates to the technical field of zero-carbon emission substation, and more specifically to the technical field of a zero-carbon emission accounting method for a substation. Background Art

[0003] As one of the main sources of greenhouse gas emissions, the power industry bears the responsibility and challenge of clean and low-carbon transformation and upgrading. Substations, as a vital component of the power system, play a key role in power production, transmission and distribution. At the same time, substations generate a large amount of carbon emissions and energy consumption during the operation and maintenance stage, mainly including operation carbon emissions, substation load energy consumption, electrical equipment self-consumption and greenhouse gas carbon emissions.

[0004] Operational carbon emissions: refers to the carbon emissions caused by the energy consumption required to maintain the operation of equipment within the substation and the increase in power generation due to transmission and transformation losses such as transformers when the substation is operating normally.

[0005] Substation load energy consumption: Energy consumption caused by powering the normal operation of equipment in the substation. According to the power supply method, it can be divided into general AC load, DC load, and UPS load. This type of energy consumption is foreseeable and controllable when building a substation.

[0006] Self-consumption of electrical equipment: The electrical equipment with coils and impedance components in the substation generate power loss during normal operation. The average power consumption rate of power plants in the power system is 7%, and the network loss of each voltage level caused by lines, transformers, etc. in power transmission and transformation is about 3%. This type of loss is uncontrolled and undesigned.

[0007] Greenhouse gas carbon emissions: natural and anthropogenic gaseous components in the atmosphere that absorb and re-emit infrared radiation. The greenhouse gases in the "Guidelines for the Calculation and Reporting of Greenhouse Gas Emissions of China's Power Grid Enterprises (Trial)" refer to the six greenhouse gases specified in the Kyoto Protocol, namely carbon dioxide (C02), methane (CH4), nitrous oxide (N20), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs) and sulfur hexafluoride (SF6).

[0008] Therefore, studying the carbon emission accounting method of "zero-carbon substation" provides technical support for the low-carbon construction of substations, which is of great significance for promoting the low-carbon construction and development of substations. In recent years, domestic scholars have analyzed the carbon footprint of substations during their life cycle. Some scholars believe that the calculation of the carbon footprint of substations is suitable for the life cycle method. Therefore, the substation is divided into the preparation stage, construction stage, operation stage and scrapping stage, and the carbon footprint of the substation is calculated using the life cycle method. The research results show that the carbon footprint of the construction stage accounts for 81.6% of the carbon footprint of the substation during its entire life cycle.

[0009] Other scholars divide the carbon footprint accounting of substations into the construction stage, building materials production and transportation stage, operation stage and demolition stage. They believe that the carbon emissions of substations throughout their life cycle mainly come from the operation stage and the construction stage. They propose that during the construction stage, relevant insulation materials, air conditioning, and light guide systems can be configured according to the technical indicators of near-zero energy consumption buildings, and other equipment can use energy-saving equipment to achieve the purpose of energy-saving design.

[0010] Some scholars have sorted out the various factors that produce carbon emissions in current substations, used a full life cycle carbon footprint model to quantify the carbon emissions in typical substation solutions, and explored solutions to reduce carbon emissions from substations from four aspects: equipment carbon reduction, energy supply substitution, building energy conservation, and operation optimization.

[0011] At present, most studies on the carbon footprint of typical equipment during the substation construction phase have the following problems:

[0012] 1. The accounting boundary of equipment carbon footprint is vague and there is no clear list of carbon emission sources, so it is impossible to judge the reliability of its calculation results;

[0013] 2. The study did not provide the specific calculation process for each life stage of the equipment and the emission factors used in the process, so it is impossible to judge the accuracy of its calculation results. Summary of the invention

[0014] The purpose of the present invention is to solve the above technical problems and provide a method for calculating zero carbon emissions in a substation.

[0015] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0016] The present invention provides a method for calculating zero carbon emissions from a substation, comprising the following steps:

[0017] Adopt new energy systems to provide power for electrical equipment and online equipment in substations, use natural ester insulating oil transformers instead of mineral oil transformers, and use environmentally friendly gas-insulated metal-enclosed combined equipment instead of sulfur hexafluoride metal-enclosed combined equipment;

[0018] When the carbon emissions reduced by the new energy system in the substation are greater than the carbon emissions increased by the load in the substation, the zero carbon emissions target is achieved during the operation phase in the substation.

[0019] Specifically, the electrical equipment uses green equipment such as natural ester insulating oil transformers and environmentally friendly gas-insulated metal-enclosed combined equipment, which does not produce carbon emissions during the operation of the substation. At the same time, when the carbon emissions reduced by the power generation of the new energy system in the substation are greater than the carbon emissions increased by the load in the substation, the zero carbon emission target is achieved during the operation of the substation.

[0020] In one embodiment, the natural ester insulating oil is derived from vegetable oil, and the carbon element contained therein is derived from carbon dioxide absorbed from the atmosphere. After its service life ends, it can be completely degraded within 28 days, and the carbon element therein returns to the atmosphere.

[0021] Specifically, in terms of carbon emissions from substation equipment operation, this solution uses natural ester insulating oil transformers to eliminate the carbon footprint in the transformer link. Taking a 110kV 63MVA main transformer as an example, each unit requires about 22 tons of mineral oil, and each ton of mineral oil produces about 1.23 tons of carbon emissions. The total annual carbon emissions of three main transformers are about 81 tons. Replacing mineral oil in transformers with natural esters can basically solve the problem of mineral oil carbon emissions. Natural ester insulating oil is derived from vegetable oil, and the carbon elements it contains come from carbon dioxide absorbed from the atmosphere. After its service life ends, it can be completely degraded after 28 days, and the carbon elements in it return to the atmosphere. Therefore, the life cycle of natural ester insulating oil basically achieves "carbon neutrality."

[0022] In one embodiment, in the carbon emissions from the operation of the substation equipment, an environmentally friendly gas-insulated metal-enclosed combined equipment composed of nitrogen and oxygen is used instead of the sulfur hexafluoride metal-enclosed combined equipment, and the global warming potential is zero.

[0023] Specifically, operational carbon emissions refer to the carbon emissions caused by the energy consumption required to maintain the operation of equipment within the substation when the substation is operating normally, as well as the increase in power generation caused by transmission and transformation losses such as transformers.

[0024] In one embodiment, an environmentally friendly gas-insulated metal-enclosed combined device consisting of 80% nitrogen and 20% oxygen is used to replace the SF6 metal-enclosed combined device.

[0025] Specifically, this solution uses environmentally friendly gas-insulated metal-enclosed combined equipment composed of 80% nitrogen and 20% oxygen to replace SF6 (strong greenhouse gas) metal-enclosed combined equipment, with a global warming potential (GWP) of zero.

[0026] Sulfur hexafluoride is a strong greenhouse gas and an inorganic compound with the chemical formula SF6. It is a colorless, odorless, non-toxic, non-flammable, stable gas at room temperature and pressure. Its molecular weight is 146.055 and its density is 6.0886 kg / m at 20°C and 0.1 MPa. 3 , which is about 5 times the density of air. The molecular structure of sulfur hexafluoride is octahedral, with a small bonding distance and high bonding energy, so its stability is very high. When the temperature does not exceed 180°C, its compatibility with electrical structural materials is similar to that of nitrogen.

[0027] Taking a 110kV station full set of sulfur hexafluoride metal-enclosed combined equipment (GIS) as an example, sulfur hexafluoride (SF6) gas is about 2.25 tons, and the total carbon emission stock is 53,775 tons. The annual leakage allowance is 1%, and the leakage amount is 0.0225 tons. Since the global warming potential (GWP) of sulfur hexafluoride is 23,900 times that of carbon dioxide, it is converted into carbon emissions of 537.75 tons. After replacing it with clean air metal-enclosed combined equipment (GIS), the metal-enclosed combined equipment (GIS) can achieve zero-carbon operation.

[0028] In one embodiment, the new energy system in the substation includes a photovoltaic power generation device and / or a wind power generation device configured in the substation.

[0029] In one embodiment, for the carbon emissions of power consumption of a substation, the calculation formula for the emissions generated by power consumption of a substation is as follows:

[0030] E 站用电负荷 =AD 站用电负荷 ×EF 电网 ×GWP CO2 ;

[0031] In the formula, E 站用电负荷 It represents the total amount of carbon dioxide emissions caused by power loss in substations, in tons of carbon dioxide equivalent (tCO2e);

[0032] AD 站用电负荷 Indicates the amount of electricity loss in the substation, in megawatt-hours (MWh);

[0033] EF 电网 It represents the annual average power supply emission factor of the regional power grid, in tons of carbon dioxide equivalent per megawatt-hour (tCO2e / MWh), which is based on the latest data released by the country;

[0034] GWP CO2 Represents the carbon dioxide emission factor, the global warming potential of carbon dioxide, and its value is 1.

[0035] In one embodiment, photovoltaic power generation devices are installed on the roof and south facade of each power distribution device building of the substation; the online power Ep of the photovoltaic power generation device is calculated as follows:

[0036] Ep = HA × PAZ / ES × K;

[0037] Where HA represents the total solar radiation on the horizontal surface, kW·h / m 2 ;

[0038] ES represents the irradiance under standard conditions, constant = 1kW·h / m 2 ;

[0039] Ep is the grid-connected power generation, kW·h;

[0040] PAZ represents the installed capacity of the module, kW;

[0041] K represents the comprehensive efficiency coefficient.

[0042] In one embodiment, the wind power generation device is a vertical axis wind turbine generator set, and a number of vertical axis wind turbine generator sets are provided, each unit has a capacity of 5 kW, and an average annual total power generation of 2a MWh;

[0043] The formula for calculating the total annual power generation of the new energy system is as follows:

[0044] AD 新能源 =(Ep+2a);

[0045] The calculation formula for reducing carbon emissions each year through renewable energy power generation is as follows:

[0046] E 新能源 =AD 新能源 ×GWP 新能源 =(Ep+2a)×(EFOM*0.75+EFBM*0.25);

[0047] Where GWP 新能源 It is the regional power grid baseline emission factor, which is used when developing emission reduction projects (CDM projects, CCER projects). It is obtained by weighting the marginal emission factor of electricity (EFOM) and the marginal emission factor of capacity (EFBM). EFOM can be simply understood as the carbon emission reduction caused by the thermal power plant generating less electricity for each additional kilowatt-hour of electricity generated by new energy for the existing installed capacity. EFBM can be simply understood as the carbon emission reduction caused by the thermal power plant generating less electricity for each additional kilowatt-hour of electricity generated by new energy for the newly installed capacity. For wind power and photovoltaic projects, the calculation formula of the baseline emission factor is as follows:

[0048] GWP 新能源 =EFOM*0.75+EFBM*0.25.

[0049] In one embodiment, the calculation method of the annual comprehensive green electricity and carbon emissions in the substation is as follows:

[0050] The calculation formula for the annual comprehensive green electricity in the substation is as follows:

[0051] AD 新能源 -AD 站用电负荷 =(Ep+2a)-AD 站用电负 ;

[0052] The calculation formula for annual comprehensive carbon emissions in substations is as follows:

[0053] E综合 =E 新能源 -E 站用电负荷 =(Ep+2a)×(EFOM*0.75+EFBM*0.25)-AD 站用电负荷 ×EF 电网

[0054] ×GWP CO2 .

[0055] The beneficial effects of the present invention are as follows:

[0056] 1. The present invention is reasonably designed, and the electrical equipment adopts green equipment such as natural ester insulating oil transformers and environmentally friendly gas-insulated metal-enclosed combined equipment, which does not generate carbon emissions during the operation stage of the substation. At the same time, when the carbon emissions reduced by the power generation of the new energy system in the substation are greater than the carbon emissions increased by the load in the substation, the zero carbon emission target is achieved during the operation stage in the substation.

[0057] 2. Based on conventional substations, the present invention proposes a new carbon emission accounting method for "zero-carbon substations", which combines new low-carbon and zero-carbon equipment, comprehensive energy compensation, building energy conservation and other means to achieve the offset of carbon emissions during the operation of substations, and ultimately achieve zero carbon emissions during the operation of substations, which has significant significance for carbon neutrality, energy conservation and emission reduction, and corporate social responsibility.

[0058] 3. The most typical necessary power consumption during the normal operation of the substation is the power consumption of the substation. The present invention considers using photovoltaic and wind power clean energy to make up for this energy consumption to achieve carbon neutrality of the substation. DETAILED DESCRIPTION

[0059] In order to make the technical problems, technical solutions and technical effects of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0060] Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] Example 1

[0062] This embodiment provides a method for calculating zero carbon emissions from a substation, including the following steps:

[0063] Adopt new energy systems to provide power for electrical equipment and online equipment in substations, use natural ester insulating oil transformers instead of mineral oil transformers, and use environmentally friendly gas-insulated metal-enclosed combined equipment instead of sulfur hexafluoride metal-enclosed combined equipment;

[0064] When the carbon emissions reduced by the new energy system in the substation are greater than the carbon emissions increased by the load in the substation, the zero carbon emissions target is achieved during the operation phase in the substation.

[0065] Specifically, the electrical equipment uses green equipment such as natural ester insulating oil transformers and environmentally friendly gas-insulated metal-enclosed combined equipment, which does not produce carbon emissions during the operation of the substation. At the same time, when the carbon emissions reduced by the power generation of the new energy system in the substation are greater than the carbon emissions increased by the load in the substation, the zero carbon emission target is achieved during the operation of the substation.

[0066] Example 2

[0067] This embodiment provides a method for calculating zero carbon emissions from a substation, including the following steps:

[0068] Adopt new energy systems to provide power for electrical equipment and online equipment in substations, use natural ester insulating oil transformers instead of mineral oil transformers, and use environmentally friendly gas-insulated metal-enclosed combined equipment instead of sulfur hexafluoride metal-enclosed combined equipment;

[0069] When the carbon emissions reduced by the new energy system in the substation are greater than the carbon emissions increased by the load in the substation, the zero carbon emissions target is achieved during the operation phase in the substation.

[0070] Natural ester insulating oil is derived from vegetable oil. The carbon it contains comes from carbon dioxide absorbed from the atmosphere. After its service life ends, it can be completely degraded within 28 days, and the carbon in it returns to the atmosphere.

[0071] Specifically, in terms of carbon emissions from substation equipment operation, this solution uses natural ester insulating oil transformers to eliminate the carbon footprint in the transformer link. Taking a 110kV 63MVA main transformer as an example, each unit requires about 22 tons of mineral oil, and each ton of mineral oil produces about 1.23 tons of carbon emissions. The total annual carbon emissions of three main transformers are about 81 tons. Replacing mineral oil in transformers with natural esters can basically solve the problem of mineral oil carbon emissions. Natural ester insulating oil is derived from vegetable oil, and the carbon elements it contains come from carbon dioxide absorbed from the atmosphere. After its service life ends, it can be completely degraded after 28 days, and the carbon elements in it return to the atmosphere. Therefore, the life cycle of natural ester insulating oil basically achieves "carbon neutrality."

[0072] Example 3

[0073] This embodiment is further optimized on the basis of Embodiment 1 or 2, specifically:

[0074] In the carbon emissions from the operation of substation equipment, environmentally friendly gas-insulated metal-enclosed combined equipment composed of nitrogen and oxygen is used instead of sulfur hexafluoride metal-enclosed combined equipment, with a global warming potential of zero.

[0075] Environmentally friendly gas-insulated metal-enclosed combined equipment consisting of 80% nitrogen and 20% oxygen is used to replace SF6 metal-enclosed combined equipment.

[0076] Specifically, this solution uses environmentally friendly gas-insulated metal-enclosed combined equipment composed of 80% nitrogen and 20% oxygen to replace SF6 (strong greenhouse gas) metal-enclosed combined equipment, with a global warming potential (GWP) of zero.

[0077] Sulfur hexafluoride is a strong greenhouse gas and an inorganic compound with the chemical formula SF6. It is a colorless, odorless, non-toxic, non-flammable, stable gas at room temperature and pressure. Its molecular weight is 146.055 and its density is 6.0886 kg / m at 20°C and 0.1 MPa. 3 , which is about 5 times the density of air. The molecular structure of sulfur hexafluoride is octahedral, with a small bonding distance and high bonding energy, so its stability is very high. When the temperature does not exceed 180°C, its compatibility with electrical structural materials is similar to that of nitrogen.

[0078] Taking a 110kV station full set of sulfur hexafluoride metal-enclosed combined equipment (GIS) as an example, sulfur hexafluoride (SF6) gas is about 2.25 tons, and the total carbon emission stock is 53,775 tons. The annual leakage allowance is 1%, and the leakage amount is 0.0225 tons. Since the global warming potential (GWP) of sulfur hexafluoride is 23,900 times that of carbon dioxide, it is converted into carbon emissions of 537.75 tons. After replacing it with clean air metal-enclosed combined equipment (GIS), the metal-enclosed combined equipment (GIS) can achieve zero-carbon operation.

[0079] Example 4

[0080] This embodiment is further optimized on the basis of embodiment 3, specifically:

[0081] The new energy system in the substation includes photovoltaic power generation devices and / or wind power generation devices configured in the substation.

[0082] Example 5

[0083] This embodiment is further optimized on the basis of embodiment 4, specifically:

[0084] As for the carbon emissions from the electricity consumption of substations, the calculation formula for the emissions generated by the electricity loss of substations is as follows:

[0085] E 站用电负荷 =AD 站用电负荷 ×EF 电网 ×GWP CO2 ;

[0086] In the formula, E 站用电负荷 It represents the total amount of carbon dioxide emissions caused by power loss in substations, in tons of carbon dioxide equivalent (tCO2e);

[0087] AD 站用电负荷 Indicates the amount of electricity loss in the substation, in megawatt-hours (MWh);

[0088] EF 电网 It represents the annual average power supply emission factor of the regional power grid, in tons of carbon dioxide equivalent per megawatt-hour (tCO2e / MWh), which is based on the latest data released by the country;

[0089] GWP CO2 Represents the carbon dioxide emission factor, the global warming potential of carbon dioxide, and its value is 1.

[0090] Table 1 Average CO2 emission factors of regional electricity in 2021

[0091]

[0092] Photovoltaic power generation devices are installed on the roofs and south facades of each power distribution device building in the substation; the calculation formula for the grid-connected power Ep of the photovoltaic power generation device is as follows:

[0093] Ep = HA × PAZ / ES × K;

[0094] Where HA represents the total solar radiation on the horizontal surface, kW·h / m 2 ;

[0095] ES represents the irradiance under standard conditions, constant = 1kW·h / m 2 ;

[0096] Ep is the grid-connected power generation, kW·h;

[0097] PAZ represents the installed capacity of the module, kW;

[0098] K represents the comprehensive efficiency coefficient.

[0099] The wind power generation device is a vertical axis wind turbine generator set, and the number of vertical axis wind turbine generator sets is a, with a single unit capacity of 5kW and an annual average total power generation of 2a MWh;

[0100] The formula for the total annual power generation of the new energy system is as follows:

[0101] AD 新能源 =(Ep+2a);

[0102] The calculation formula for reducing carbon emissions each year through renewable energy power generation is as follows:

[0103] E 新能源 =AD 新能源 ×GWP 新能源 =(Ep+2a)×(EFOM*0.75+EFBM*0.25);

[0104] Where GWP 新能源 It is the baseline emission factor of the regional power grid, which is used when developing emission reduction projects (CDM projects, CCER projects). It is obtained by weighting the marginal emission factor of electricity (EFOM) and the marginal emission factor of capacity (EFBM). EFOM can be simply understood as the carbon emissions reduced by one kilowatt-hour of electricity generated by new energy for the existing installed capacity, which makes the thermal power plant generate less electricity. EFBM can be simply understood as the carbon emissions reduced by one kilowatt-hour of electricity generated by new energy for the newly installed capacity, which makes these newly installed capacity generate less electricity. For wind power and photovoltaic projects, their baseline emission factor GWP 新能源 =EFOM*0.75+EFBM*0.25.

[0105] The calculation method for the annual comprehensive green electricity and carbon emissions in the substation is as follows:

[0106] The calculation formula for the annual comprehensive green electricity in the substation is as follows:

[0107] AD 新能源 -AD 站用电负荷 =(Ep+2a)-AD 站用电负 ;

[0108] The calculation formula for annual comprehensive carbon emissions in substations is as follows:

[0109] E 综合 =E 新能源 -E 站用电负荷 =(Ep+2a)×(EFOM*0.75+EFBM*0.25)-AD 站用电负荷 ×EF 电网

[0110] ×GWP CO2 .

Claims

1. A method for calculating zero carbon emissions from a substation, characterized in that: The steps include: Adopt new energy systems to provide power for electrical equipment and online equipment in substations, use natural ester insulating oil transformers instead of mineral oil transformers, and use environmentally friendly gas-insulated metal-enclosed combined equipment instead of sulfur hexafluoride metal-enclosed combined equipment; When the carbon emissions reduced by the new energy system in the substation are greater than the carbon emissions increased by the load in the substation, the zero carbon emissions target is achieved during the operation phase in the substation.

2. A method for calculating zero carbon emissions from a substation according to claim 1, characterized in that: Natural ester insulating oil is derived from vegetable oil. The carbon it contains comes from carbon dioxide absorbed from the atmosphere. After its service life ends, it can be completely degraded within 28 days, and the carbon in it returns to the atmosphere.

3. A method for calculating zero carbon emissions of a substation according to claim 1, characterized in that: In terms of carbon emissions from substation equipment operation, environmentally friendly gas-insulated metal-enclosed combined equipment composed of nitrogen and oxygen is used instead of sulfur hexafluoride metal-enclosed combined equipment.

4. A method for calculating zero carbon emissions of a substation according to claim 3, characterized in that: Environmentally friendly gas-insulated metal-enclosed combined equipment consisting of 80% nitrogen and 20% oxygen is used to replace SF6 metal-enclosed combined equipment.

5. A method for calculating zero carbon emissions of a substation according to claim 1, characterized in that: The new energy system in the substation includes photovoltaic power generation devices and / or wind power generation devices configured in the substation.

6. A method for calculating zero carbon emissions of a substation according to claim 5, characterized in that: As for the carbon emissions from the electricity consumption of substations, the calculation formula for the emissions generated by the electricity loss of substations is as follows: AND 站用电负荷 =AD 站用电负荷 ×EF 电网 ×GWP CO2 ; In the formula, E 站用电负荷 It represents the total amount of carbon dioxide emissions caused by power loss in substations, in tons of carbon dioxide equivalent (tCO2e); AD 站用电负荷 Indicates the amount of electricity loss in the substation, in megawatt-hours (MWh); EF 电网 It represents the average annual power supply emission factor of the regional power grid, in tons of carbon dioxide equivalent per megawatt-hour (tCO2e / MWh), based on the latest national data: GWPCO2 stands for the global warming potential of carbon dioxide.

7. A method for calculating zero carbon emissions of a substation according to claim 6, characterized in that: Photovoltaic power generation devices are installed on the roofs and south facades of each power distribution device building of the substation; the calculation formula for the grid-connected power Ep of the photovoltaic power generation device is as follows: Ep=HA×PAZ / ES×K; Where HA represents the total solar radiation on the horizontal surface, kW·h / m 2 ; ES represents the irradiance under standard conditions, constant = 1kW·h / m 2 ; Ep is the grid-connected power generation, kW·h; PAZ represents the installed capacity of the module, kW; K represents the comprehensive efficiency coefficient.

8. A method for calculating zero carbon emissions of a substation according to claim 7, characterized in that: The wind power generation device is a vertical axis wind turbine generator set, and the number of vertical axis wind turbine generator sets is a, with a single unit capacity of 5kW and an annual average total power generation of 2a MWh; The formula for calculating the total annual power generation of the new energy system is as follows: <h2 style=";text-align:left;direction:ltr">AD<h2 style=";text-align:left;direction:ltr"> 新能源 <h2 style=";text-align:left;direction:ltr"> =(Ep+2a); The calculation formula for reducing carbon emissions each year through renewable energy power generation is as follows: <h2 style=";text-align:left;direction:ltr">E<h2 style=";text-align:left;direction:ltr"> 新能源 <h2 style=";text-align:left;direction:ltr"> =AD<h2 style=";text-align:left;direction:ltr"> 新能源 <h2 style=";text-align:left;direction:ltr"> ×GWP<h2 style=";text-align:left;direction:ltr"> 新能源 <h2 style=";text-align:left;direction:ltr"> =(Ep+2a)×(EFOM*0.75+EFBM*0.25); In the formula, GWP is the regional grid baseline emission factor, which is used when developing emission reduction projects (CDM projects, CCER projects). It is obtained by weighting the marginal emission factor of electricity (EFOM) and the marginal emission factor of capacity (EFBM). For wind power and photovoltaic projects, the calculation formula of the baseline emission factor is as follows; GWP 新能源 =EFOM*0.75+EFBM*0.25。 9. A method for calculating zero carbon emissions of a substation according to claim 8, characterized in that: The calculation method for the annual comprehensive green electricity and carbon emissions in the substation is as follows: The calculation formula for the annual comprehensive green electricity in the substation is as follows: <h2 style=";text-align:left;direction:ltr">AD<h2 style=";text-align:left;direction:ltr"> 新能源 <h2 style=";text-align:left;direction:ltr"> -AD<h2 style=";text-align:left;direction:ltr"> 站用电负荷 <h2 style=";text-align:left;direction:ltr"> =(Ep+2a)-AD<h2 style=";text-align:left;direction:ltr"> 站用电负 <h2 style=";text-align:left;direction:ltr"> ; The calculation formula for annual comprehensive carbon emissions in substations is as follows: HAVE BEEN 综合 =E 新能源 -HAVE BEEN 站用电负荷 =(Ep+2a)×(EFOM*0.75+EFBM*0.25)-AD 站用电负荷 ×EF 电网 ×GWP CO2 .

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