Power system carbon emission real-time calculation system and calculation method

Abstract

The invention discloses an electric power system carbon emission real-time calculation system and calculation method, and relates to the technical field of carbon emission monitoring, and the method comprises the following steps: S1, electric quantity statistics; s2, counting the total carbon emission; s3, total electricity quantity statistics after electricity transaction correction is considered; s4, calculating the corrected average emission factor of the power grid in consideration of the power transaction; and S5, calculating the carbon emission of the total electricity consumption, and performing calculation by adopting a power grid average emission factor correction method according to the data obtained in the steps S1, S2 and S3. According to the method, the carbon emission of the user is monitored by adopting a method for correcting the average emission factor of the power grid, so that the actual carbon emission caused by power utilization in a specific region time period can be accurately monitored, and the influence of green power and green certificate transaction volume on the carbon emission is effectively avoided; and therefore, the carbon emission generated by electricity utilization of the user in a specific region time period can be accurately monitored.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon emission monitoring, and in particular to a real-time calculation system and method for carbon emission of an electric power system. Background Art

[0002] Carbon dioxide emissions have reached their highest level since measurements began in recent years, which is widely considered to be one of the main factors leading to the increased frequency of extreme climate events; therefore, accurate and reliable carbon dioxide emission data has become a benchmark for formulating policies and setting emission reduction targets, which is crucial for carbon emission-related research; among all industries, the power industry has the highest proportion of CO2 emissions, making the carbon emission accounting of this industry an important part of the overall carbon emission accounting.

[0003] At present, the method for real-time calculation of carbon emissions in the power industry is the emission factor method, which relies on the construction of emission factors and activity data for each emission source. The accuracy of activity data is affected by the statistical basis of energy consumption data. In countries with developed statistical systems, the accounting error of energy activity data is kept within 5%, while in countries with underdeveloped statistical systems, it can reach 10%.

[0004] However, among various solutions for the low-carbon transformation of power systems, the market mechanism is considered to be one of the key components of the low-carbon transformation plan for power systems due to its outstanding performance in optimizing resource allocation and driving autonomous carbon reduction. In this context, the environmental value of electricity has received widespread attention; my country has launched a pilot demonstration of green electricity trading; on September 7, 2021, the first domestic green electricity transaction was completed; 259 market players from 17 provinces including Beijing, Jiangsu, and Liaoning reached a green electricity transaction of 7.935 billion kWh, which is expected to reduce CO2 emissions by 6.0718 million tons. For users who purchase green electricity, the environmental value of the electricity should be fully transferred to the users who purchase the electricity. When the emission factor method is used to calculate direct carbon emissions, it will lead to repeated accounting of environmental value. In view of this, the present invention proposes a real-time calculation system and method for carbon emissions in a power system. Summary of the invention

[0005] The present invention discloses a real-time calculation system and method for carbon emissions of an electric power system, aiming to solve the technical problems in the background technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A method for real-time calculation of carbon emissions of a power system comprises the following steps:

[0008] S1. Electricity statistics: Calculate the electricity purchased and not purchased from the electricity market in a specified area and time period through the comprehensive calculation platform of the power company;

[0009] S2. Statistics of total carbon emissions: Calculate the total carbon emissions generated by the electricity purchased from the electricity market and the electricity not purchased during the specified time period calculated in step S1 through a continuous emissions monitoring system (CEMS), and calculate the indirect carbon dioxide emissions from the electricity purchased using power equipment;

[0010] S3, taking into account the statistics of the total amount of electricity after the power transaction is corrected; the total amount of electricity in the specified area and time period, as well as the total amount of traded electricity, are calculated by the comprehensive calculation platform of the power company in step S1;

[0011] S4, calculating the average emission factor of the power grid after correction considering power trading, using the data calculated in steps S2 and S3 and calculating using a specific formula;

[0012] S5. Calculation of carbon emissions of total electricity consumption, using the data obtained in steps S1, S2 and S3, using the modified grid average emission factor method to calculate.

[0013] In a preferred solution, in step S1, the calculation method for the amount of electricity purchased and not purchased from the electricity market in the specified area time period is:

[0014] Electricity purchase volume = electricity purchase amount / electricity unit price.

[0015] By calculating the amount of electricity purchased and not purchased from the electricity market during a specified area time period, the total amount of electricity purchased and not purchased by the user during a specific area time period can be obtained.

[0016] In a preferred embodiment, the specific formula used in step S4 is:

[0017] EF' G =(C F +C ele -C tra ) / (A d -A tra )

[0018] In the above formula, EF' G C is the average emission factor of the power grid after correction for electricity trading; F The total carbon emissions generated when generating electricity from electricity purchased from the electricity market and electricity not purchased; C ele Indirect carbon dioxide emissions from electricity purchased using power equipment; tra To trade the carbon emissions of electricity; d A is the total amount of electricity purchased and not purchased from the electricity market during a specified period of time in a specified area; tra The total amount of electricity traded.

[0019] By adopting the above formula, the carbon emissions from traded electricity can be eliminated when calculating the carbon emission factor, so that the carbon emissions generated when electricity is used in the power system in a specific area and time period can be calculated more accurately.

[0020] In a preferred solution, the carbon emission calculation formula of the total electricity consumption in step S5 is:

[0021] E G =AD nG ×EF' G +AD tra ×e tra

[0022] In the above formula, E G Carbon emissions from total electricity consumption; AD nG With AD tra They are the amount of electricity purchased and not purchased by the user from the electricity market in a specific time zone; EF' G The average emission factor of the power grid after correction to take into account power trading; tra The carbon emission factor for the generators that produce the traded electricity.

[0023] The carbon emissions of the total electricity consumption can be calculated using the above formula.

[0024] In a preferred embodiment, the carbon emission factor e of the generator generating the traded electricity is tra The calculation method is:

[0025] Carbon emission factor of the generator producing the traded electricity = CO2 emissions per unit of energy or substance / unit of energy or substance used.

[0026] Through the above calculation method, the carbon emission factor of the power generation that generates the traded electricity can be accurately calculated.

[0027] In a preferred embodiment, the specific formula used in step S4 is:

[0028] EF' G =(C F +C ele -C tra ) / (A d -A tra -Q NFC )

[0029] In the above formula, EF' G C is the average emission factor of the power grid after correction for electricity trading; FThe total carbon emissions generated when generating electricity from electricity purchased from the electricity market and electricity not purchased; C ele Indirect carbon dioxide emissions from electricity purchased using power equipment; tra To trade the carbon emissions of electricity; d A is the total amount of electricity purchased and not purchased from the electricity market during a specified period of time in a specified area; tra is the total amount of traded electricity; Q NFC Green certificate trading volume.

[0030] The above formula can eliminate the green certificate trading volume used to offset carbon emissions, making the monitored total carbon emissions more accurate.

[0031] A real-time calculation system for carbon emissions of a power system, comprising:

[0032] Data collection platform, power plant platform, user platform and data processing platform, wherein the data processing platform is used to aggregate and process the data transmitted by the data collection platform, power plant platform and user platform.

[0033] In a preferred solution, the data collection platform is internally provided with a first data receiving module, a first central processing unit module, a first data conversion module, a first data calculation module, a first data storage module and a first data transmission module; the data collection platform is used to calculate, summarize and transmit the amount of electricity purchased and not purchased by users from the electricity market in a specific area and time period.

[0034] By setting up a data collection platform, the user's power supply and purchased electricity can be monitored in real time.

[0035] In a preferred solution, the power plant platform is internally provided with a second data receiving module, a second central processing unit module, a second data conversion module, a second data calculation module, a second data storage module and a second data transmission module; the power plant platform is used to calculate, summarize and transmit the carbon emission data of the power plant's power generation equipment during power generation.

[0036] By setting up a power plant platform, it is possible to monitor the total carbon emissions generated when the power generation equipment using the total electricity collected through the data collection platform generates electricity.

[0037] In a preferred solution, the user platform is internally provided with a third data receiving module, a third central processing unit module, a third data calculation module, a third data storage module and a third data transmission module.

[0038] By setting up a user platform, the electricity consumption generated by users can be monitored in real time.

[0039] As can be seen from the above, the present invention provides a real-time calculation system and method for carbon emissions from a power system. By adopting the modified average emission factor method of the power grid to monitor the carbon emissions of users, the actual carbon emissions caused by electricity consumption in a specific area and time period can be accurately monitored, and the impact of green electricity and green certificate trading volume on carbon emissions can be effectively avoided, thereby accurately monitoring the carbon emissions generated by users' electricity consumption in a specific area and time period. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a flowchart of the steps of a real-time calculation method for carbon emissions of an electric power system proposed by the present invention.

[0041] Figure 2 This is a structural diagram of a real-time calculation system for carbon emissions from a power system proposed by the present invention. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0043] The present invention discloses a real-time calculation system and method for carbon emissions of a power system, which are mainly used in the real-time calculation process of carbon emissions by the emission factor method currently commonly used. The method relies on the construction of emission factors and activity data for each emission source. The accuracy of the activity data is affected by the statistical basis of energy consumption data. In countries with developed statistical systems, the calculation error of energy activity data is kept within 5%, while in countries with underdeveloped statistical systems, it can reach 10%. Since China plays an important role in global emissions, it is very important to evaluate China's carbon emissions in a targeted manner. In 2011, the Chinese Academy of Sciences obtained default data and emission factors for different energy types in China by integrating data from various industries, which enabled them to calculate the total CO2 emissions of different energy sources in the country. However, among various solutions for the low-carbon transformation of the power system, the market mechanism is considered to be one of the key components of the low-carbon transformation plan for the power system because of its outstanding performance in optimizing resource allocation and driving autonomous carbon reduction. In this context, my country has launched a pilot demonstration of green power trading. For users who purchase green power, the environmental value of the power should be completely transferred to the users who purchase the power. When the emission factor method is used to calculate direct carbon emissions, it will lead to repeated settlement of environmental value and inaccurate calculation data. Therefore, in order to reasonably reflect the impact of electricity trading on carbon emission accounting, a modified grid average emission factor method is proposed. By adopting the modified grid average emission factor method to monitor users' carbon emissions, the actual carbon emissions caused by electricity consumption in a specific area and time period can be accurately monitored, and the impact of green electricity and green certificate trading on carbon emissions can be effectively avoided.

[0044] Reference Figure 1 , a real-time calculation method for carbon emissions of a power system, comprising the following steps:

[0045] S1. Electricity statistics: Calculate the electricity purchased and not purchased from the electricity market in a specified area and time period through the comprehensive calculation platform of the power company;

[0046] In a preferred solution, in step S1, the calculation method for the amount of electricity purchased and not purchased from the electricity market in the specified area time period is:

[0047] Electricity purchase volume = electricity purchase amount / electricity unit price.

[0048] By calculating the amount of electricity purchased and not purchased from the electricity market during a specified area time period, the total amount of electricity purchased and not purchased by the user during a specific area time period can be obtained.

[0049] S2. Statistics of total carbon emissions: Calculate the total carbon emissions generated by the electricity purchased from the electricity market and the electricity not purchased during the specified time period calculated in step S1 through a continuous emissions monitoring system (CEMS), and calculate the indirect carbon dioxide emissions from the electricity purchased using power equipment;

[0050] S3, taking into account the statistics of the total amount of electricity after the power transaction is corrected; the total amount of electricity in the specified area and time period, as well as the total amount of traded electricity, are calculated by the comprehensive calculation platform of the power company in step S1;

[0051] S4, calculating the average emission factor of the power grid after correction considering power trading, using the data calculated in steps S2 and S3 and calculating using a specific formula;

[0052] In a preferred embodiment, the specific formula used in step S4 is:

[0053] EF' G =(C F +C ele -C tra ) / (A d -A tra )

[0054] In the above formula, EF' G C is the average emission factor of the power grid after correction for electricity trading; F The total carbon emissions generated when generating electricity from electricity purchased from the electricity market and electricity not purchased; C ele Indirect carbon dioxide emissions from electricity purchased using power equipment; tra To trade the carbon emissions of electricity; d A is the total amount of electricity purchased and not purchased from the electricity market during a specified period of time in a specified area; tra The total amount of electricity traded.

[0055] By adopting the above formula, the carbon emissions from traded electricity can be eliminated when calculating the carbon emission factor, so that the carbon emissions generated when electricity is used in the power system in a specific area and time period can be calculated more accurately.

[0056] S5. Calculation of carbon emissions of total electricity consumption, using the data obtained in steps S1, S2 and S3 using a modified grid average emission factor method.

[0057] In a preferred solution, the carbon emission calculation formula of the total electricity consumption in step S5 is:

[0058] E G =AD nG ×EF' G+AD tra ×e tra

[0059] In the above formula, E G Carbon emissions from total electricity consumption; AD nG With AD tra They are the amount of electricity purchased and not purchased by the user from the electricity market in a specific time zone; EF' G The average emission factor of the power grid after correction to take into account power trading; tra The carbon emission factor for the generators that produce the traded electricity.

[0060] The carbon emissions of the total electricity consumption can be calculated using the above formula.

[0061] In a preferred embodiment, the carbon emission factor e of the generator generating the traded electricity is tra The calculation method is:

[0062] Carbon emission factor of the generator producing the traded electricity = CO2 emissions per unit of energy or substance / unit of energy or substance used.

[0063] Through the above calculation method, the carbon emission factor of the power generation that generates the traded electricity can be accurately calculated.

[0064] Embodiment 2

[0065] On the basis of the first embodiment, and different from the first embodiment,

[0066] In a preferred embodiment, the specific formula used in step S4 is:

[0067] EF' G =(C F +C ele -C tra ) / (A d -A tra -Q NFC )

[0068] In the above formula, EF' G C is the average emission factor of the power grid after correction for electricity trading; F The total carbon emissions generated when generating electricity from electricity purchased from the electricity market and electricity not purchased; C ele Indirect carbon dioxide emissions from electricity purchased using power equipment; tra To trade the carbon emissions of electricity; d A is the total amount of electricity purchased and not purchased from the electricity market during a specified period of time in a specified area; tra is the total amount of traded electricity; QNFC Green certificate trading volume.

[0069] The above formula can eliminate the green certificate trading volume used to offset carbon emissions, making the monitored total carbon emissions more accurate.

[0070] Reference Figure 2 , a real-time calculation system for carbon emissions of a power system, comprising:

[0071] Data collection platform, power plant platform, user platform and data processing platform, wherein the data processing platform is used to aggregate and process the data transmitted by the data collection platform, power plant platform and user platform.

[0072] In a preferred solution, the data collection platform is internally provided with a first data receiving module, a first central processing unit module, a first data conversion module, a first data calculation module, a first data storage module and a first data transmission module; the data collection platform is used to calculate, summarize and transmit the amount of electricity purchased and not purchased by users from the electricity market in a specific area and time period.

[0073] By setting up a data collection platform, the user's power supply and purchased electricity can be monitored in real time.

[0074] In a preferred solution, the power plant platform is internally provided with a second data receiving module, a second central processing unit module, a second data conversion module, a second data calculation module, a second data storage module and a second data transmission module; the power plant platform is used to calculate, summarize and transmit the carbon emission data of the power plant's power generation equipment during power generation.

[0075] By setting up a power plant platform, it is possible to monitor the total carbon emissions generated when the power generation equipment using the total electricity collected through the data collection platform generates electricity.

[0076] In a preferred solution, the user platform is internally provided with a third data receiving module, a third central processing unit module, a third data calculation module, a third data storage module and a third data transmission module.

[0077] By setting up a user platform, the electricity consumption generated by users can be monitored in real time.

[0078] To summarize, the present invention provides a real-time calculation system and method for carbon emissions from an electric power system. By adopting the modified average emission factor method of the power grid to monitor the carbon emissions of users, it is possible to accurately monitor the actual carbon emissions caused by electricity consumption in a specific area and time period, and effectively avoid the impact of green electricity and green certificate trading volume on carbon emissions, thereby being able to accurately monitor the carbon emissions generated by users' electricity consumption in a specific area and time period.

[0079] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A real-time calculation method for carbon emissions of a power system, characterized in that: The following steps are involved: S1. Electricity statistics: Calculate the electricity purchased and not purchased from the electricity market in a specified area and time period through the comprehensive calculation platform of the power company; S2, total carbon emissions statistics; Calculate, by means of a continuous emissions monitoring system (CEMS), the total carbon emissions generated by the electricity purchased from the electricity market and the electricity not purchased during the designated area time period calculated in step S1, and calculate the indirect carbon dioxide emissions generated by the electricity purchased using the power equipment; S3, total electricity statistics after considering electricity trading correction; Calculate the total electricity volume in the specified area and time period, and the total amount of traded electricity through the integrated calculation platform of the power company in step S1; S4, calculating the average emission factor of the power grid after correction considering power trading, using the data calculated in steps S2 and S3 and calculating using a specific formula; S5. Calculation of carbon emissions of total electricity consumption, using the data obtained in steps S1, S2 and S3, using the modified grid average emission factor method to calculate.

2. A method for real-time calculation of carbon emissions from a power system according to claim 1, characterized in that: In step S1, the calculation method for the amount of electricity purchased and not purchased from the electricity market in the specified area time period is: Electricity purchase volume = electricity purchase amount / electricity unit price.

3. A method for real-time calculation of carbon emissions from a power system according to claim 1, characterized in that: The specific formula used in step S4 is: EF' G =(C F +C ele -C tra ) / (A d -A tra ) In the above formula, EF' G C is the average emission factor of the power grid after correction for electricity trading; F The total carbon emissions generated when generating electricity from electricity purchased from the electricity market and electricity not purchased; C ele Indirect carbon dioxide emissions from electricity purchased using power equipment; tra To trade the carbon emissions of electricity; d A is the total amount of electricity purchased and not purchased from the electricity market during a specified period of time in a specified area; tra The total amount of electricity traded.

4. A method for real-time calculation of carbon emissions from a power system according to claim 1, characterized in that: The specific formula used in step S4 is: EF' G =(C F +C ele -C tra ) / (A d -A tra -Q NFC ) In the above formula, EF' G C is the average emission factor of the power grid after correction for electricity trading; F The total carbon emissions generated when generating electricity from electricity purchased from the electricity market and electricity not purchased; C ele Indirect carbon dioxide emissions from electricity purchased using power equipment; tra To trade the carbon emissions of electricity; d A is the total amount of electricity purchased and not purchased from the electricity market during a specified period of time in a specified area; tra is the total amount of traded electricity; Q NFC Green certificate trading volume.

5. A method for real-time calculation of carbon emissions of a power system according to claim 1, characterized in that: The carbon emission calculation formula of the total electricity consumption in step S5 is: AND G =AD nG ×EF' G +AD tra ×e tra In the above formula, E G Carbon emissions from total electricity consumption; AD nG With AD tra They are the amount of electricity purchased and not purchased by the user from the electricity market in a specific time zone; EF' G The average emission factor of the power grid after correction to take into account power trading; tra The carbon emission factor for the generators that produce the traded electricity.

6. A method for real-time calculation of carbon emissions of a power system according to claim 5, characterized in that: The carbon emission factor e of the generator producing the traded electricity tra The calculation method is: Carbon emission factor of the generator producing the traded electricity = CO2 emissions per unit of energy or substance / unit of energy or substance used.

7. A real-time calculation system for carbon emissions in a power system, characterized in that: include: Data collection platform, power plant platform, user platform and data processing platform, wherein the data processing platform is used to aggregate and process the data transmitted by the data collection platform, power plant platform and user platform.

8. A real-time calculation system for carbon emissions from a power system according to claim 7, characterized in that: The data collection platform is internally provided with a first data receiving module, a first central processing unit module, a first data conversion module, a first data calculation module, a first data storage module and a first data transmission module; the data collection platform is used to calculate, summarize and transmit the amount of electricity purchased and not purchased by users from the electricity market in a specific area and time period.

9. A real-time calculation system for carbon emissions from a power system according to claim 7, characterized in that: The power plant platform is internally provided with a second data receiving module, a second central processing unit module, a second data conversion module, a second data calculation module, a second data storage module and a second data transmission module; the power plant platform is used to calculate, summarize and transmit the carbon emission data of the power plant's power generation equipment during power generation.

10. A real-time calculation system for carbon emissions of a power system according to claim 7, characterized in that: The user platform is internally provided with a third data receiving module, a third central processing unit module, a third data calculating module, a third data storage module and a third data transmission module.

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