A method and system for calculating electricity carbon emission factors

Abstract

The present invention discloses a method and system for calculating the carbon emission factor of electric power, which specifically includes: obtaining a data file, the content of the data file includes a static archive data node, a topology information data node, and an operating power data node; storing data in the data node in the file; calculating the total power of the power plant's on-grid electricity according to the total power of the power plant's outgoing line power and the total power of the power plant's incoming line power; obtaining the power plant's carbon factor by matching the carbon factor into a calculation formula for the power plant's carbon factor; implementing this strategy for power plants with both incoming and outgoing lines, and effectively improving the accuracy of calculating the power plant's carbon factor.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon emissions from power systems, and specifically relates to a method and system for calculating a carbon emission factor for electricity. Background Art

[0002] In the power system, power plants are one of the major sources of carbon emissions. Accurately calculating their carbon factors is crucial for overall carbon flow analysis. Traditional carbon factor calculations use Formula 1: Power Plant Carbon Emission Factor = Power Plant Carbon Emissions / Total Power Generation of Each Generating Unit within the Power Plant. In practice, Formula 2 should be used: Power Plant Carbon Emission Factor = Power Plant Carbon Emissions / Total Power Generation of Each Generating Unit within the Power Plant. The total power generation of each generating unit within a power plant is not equal to the total power generation of the power plant. This is because not all power generated by each generating unit within a power plant is connected to the grid; some power may not enter the power system. Therefore, using Formula 1 in traditional carbon factor calculations and treating the total power generation of each generating unit as the total power generation of the power plant is flawed and can lead to inaccurate calculated carbon emission factors for the power plant.

[0003] The smart grid dispatching and control system is an existing intelligent management system within the power grid. It includes the D5000 dispatching system, an advanced grid dispatching and management system capable of real-time monitoring and control of grid operations. This system is widely used in dispatching centers at all levels within the State Grid Corporation of China and is currently the most widely adopted grid dispatching and control system in the domestic power industry. The D5000 system utilizes a distributed architecture and consists of multiple subsystems that communicate over a network, enabling data sharing and coordination. The system can collect, process, and store large amounts of grid data, such as voltage, current, and power, in real time. The D5000 dispatching system contains various data files, some of which are stored in the CIME file format. Featuring multi-link data collection, multiple protocols, load balancing, multi-source data collection, and data forwarding, it plays a vital role in improving grid stability, reliability, cost-effectiveness, and reducing labor costs. Summary of the Invention

[0004] The existing technology has a problem in the traditional carbon factor calculation, which uses the calculation formula 1 of the power plant carbon emission factor. At the same time, the practice of taking the total power generation of each unit of the power plant as the total on-grid power of the power plant is flawed, which will lead to the problem of inaccurate calculated carbon emission factor of the power plant.

[0005] In order to solve the above problems, the present invention provides a method for calculating the carbon emission factor of electricity, comprising the following steps:

[0006] S1: Get raw data;

[0007] S1-1: The smart grid dispatching control system exports data files offline. The data file contents include: static archive data section, topology information data section, and operating power data section;

[0008] The content of the CIME file includes static archive data section, topology information data section, and operating power data section;

[0009] Static archive data sections include: substation archive data section, generator set archive data section, and load archive data section;

[0010] The topology information data section includes: substation connection file data section;

[0011] The operating power data section includes: the active power value data section of the unique line and substation associated with the metering point equipment;

[0012] S2: File data is entered into the database;

[0013] Extract the data information of the substation archive data section and create a new substation archive table TableA. TableA records the data information of the substation's unique identifier, substation name, substation type, and reference voltage fields.

[0014] Based on the monthly carbon emission factor data of all power plants in each region obtained from the official website of the Ministry of Ecology and Environment, a new ecological environment carbon factor management table TableF is created. The data table maintains data information such as power plant name, month, unit, and ecological environment carbon factor;

[0015] S3: power statistics;

[0016] The calculation formula for the total outgoing power Pout of the power plant is as follows:

[0017] Pout=∑Pn(n∈N+)

[0018] Where Pn represents the power value transmitted by the power plant to other substations;

[0019] The calculation formula for the total power Pin of the power plant is as follows:

[0020] Pin=∑|Pi|(i∈N+)

[0021] Where Pi represents the power value received by the power plant from other substations;

[0022] The calculation formula for the total power Ps of the power plant is as follows:

[0023] Ps=Pout-Pin

[0024] S4: carbon factor matching;

[0025] In TableA, there is a data record of a substation type of thermal power station, denoted as R;

[0026] In TableF, compare the substation name field value of R with the power plant name field value of each data record in the table. If the two are the same, the carbon factor of the substation's on-grid electricity can be calculated using the value of the ecological bureau carbon factor field in this data record using the following carbon factor (e) calculation formula. The power plant carbon factor calculation formula is as follows:

[0027]

[0028] Where eL represents the carbon factor of the power plant at the previous level, and e(env) is the carbon factor of the Ecological Environment Bureau.

[0029] An electric power carbon emission factor calculation system includes: a data acquisition module, a data input module, a power calculation module, and a carbon factor matching module;

[0030] M1: Get the original data;

[0031] M1-1: The data acquisition module exports data files from the smart grid dispatching control system offline. The data file contents include: static archive data section, topology information data section, and operating power data section;

[0032] Static archive data sections include: substation archive data section, generator set archive data section, and load archive data section;

[0033] The topology information data section includes: substation connection file data section;

[0034] The operating power data section includes: the active power value data section of the unique line and substation associated with the metering point equipment;

[0035] M2: file data is entered into the database;

[0036] The data input module extracts data information from the substation archive data section and creates a new substation archive table TableA. TableA records data information of the substation's unique identifier, substation name, substation type, and reference voltage fields.

[0037] Based on the monthly carbon emission factor data of all power plants in each region obtained from the official website of the Ministry of Ecology and Environment, a new ecological environment carbon factor management table TableF is created. The data table maintains data information such as power plant name, month, unit, and ecological environment carbon factor;

[0038] M3: Power statistics;

[0039] The power calculation module calculates the total power Pout of the power plant outgoing power as follows:

[0040] Pout=∑Pn(n∈N+)

[0041] Where Pn represents the power value transmitted by the power plant to other substations;

[0042] The power calculation module calculates the total power Pin of the power plant's incoming power using the following formula:

[0043] Pin=∑|Pi|(i∈N+)

[0044] Where Pi represents the power value received by the power plant from other substations;

[0045] The power calculation module calculates the total power Ps of the power plant on-grid electricity as follows:

[0046] Ps=Pout-Pin

[0047] M4: Carbon factor matching;

[0048] In TableA, there is a data record of a substation type of thermal power station, denoted as R;

[0049] In TableF, the carbon factor matching module compares the substation name field value in R with the power plant name field value in each data record in the table. If the two are the same, the carbon factor of the substation's on-grid electricity can be calculated using the value of the ecological bureau carbon factor field in this data record using the following carbon factor e calculation formula. The power plant carbon factor calculation formula is as follows:

[0050]

[0051] Where eL represents the carbon factor of the power plant at the previous level, and e(env) is the carbon factor of the Ecological Environment Bureau.

[0052] The beneficial effects of the present invention are as follows: power calculation is performed on a power plant with both incoming and outgoing power, carbon factor matching is performed through data integration, and the carbon emission factor of the power plant is calculated to obtain a more accurate carbon emission factor of the power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 Schematic diagram of the implementation process of the present invention;

[0054] Figure 2 This is a schematic diagram of Zhuanghe Station receiving electric energy data from Huanghai Station according to the present invention;

[0055] Figure 3 This is a schematic diagram of the Zhuanghe station transmitting power data to multiple different power plants and stations according to the present invention;

[0056] Figure 4 This is a schematic diagram of the carbon factor data of the Ecological Environment Bureau at Zhuanghe Station in July in Table F of the present invention. DETAILED DESCRIPTION

[0057] The following is a calculation of the carbon factor of a power plant using Zhuanghe Station as an example, combined with the attached figure:

[0058] S1: Get raw data;

[0059] S1-1: Export the file in the format of D5000_20240701_000001.CIME from the scheduling system D5000 offline;

[0060] S2: File data is entered into the database;

[0061] For the substation archive data section in the static archive data section of the CIME file, a new substation archive table TableA is created. TableA records the data information of the substation's unique identifier, substation name, substation type, and reference voltage fields.

[0062] Based on the monthly carbon emission factor data of all power plants in each region obtained from the official website of the Ministry of Ecology and Environment, a new carbon factor management table TableF of the Ecology and Environment Bureau is created. The data table maintains the data information of power plant name, month, unit, and carbon factor of the ecological environment data;

[0063] S3: Power statistics (taking Zhuanghe station as an example);

[0064] The calculation formula for the total outgoing power Pout of the power plant is as follows:

[0065] Pout=∑Pn(n∈N+)

[0066] Note: Pn: The power value transmitted by the power plant to other substations.

[0067] according to Figure 2 It can be seen that Zhuanghe Station transmits electricity to multiple different power plants and stations. Figure 2 Substituting the starting power of the multiple data records shown in into the above formula, we can obtain the total power of the power plant inlet of Zhuanghe Station Pout = 1576.244644;

[0068] The calculation formula for the total power Pin of the power plant is as follows:

[0069] Pin=∑|Pi|(i∈N+)

[0070] Note: Pi: The power value received by the power plant from other substations.

[0071] according to Figure 2 It can be seen that Zhuanghe Station receives power from Huanghai Station through multiple lines. Figure 2 Substituting the terminal power of multiple data records shown in into the above formula, we can obtain the total power of the power plant incoming line of Zhuanghe Station Pin = -210.563194;

[0072] The calculation formula for the total power Ps of the power plant is as follows:

[0073] Ps=Pout-Pin

[0074] According to the calculation formula of the total power Ps of the power plant, it can be calculated that Ps of Zhuanghe Station is 1365.68145;

[0075] S4: carbon factor matching;

[0076] In TableA, there is a data record of a substation type of thermal power station, denoted as R;

[0077] In TableF, compare the substation name field value of R with the power plant name field value of each data record in the table. If the two are the same, the carbon factor of the grid-connected power of the substation can use the carbon factor field value of the ecological bureau in this data record. Figure 4 It can be seen that the carbon factor of the Ecological Environment Bureau in Zhuanghe Station in July is e(env) = 0.841743. The carbon factor is calculated using the following carbon factor (e) calculation formula:

[0078] S5: The formula for calculating the carbon factor of a power plant is as follows:

[0079]

[0080] Note: eL: Carbon factor of the power plant at the previous level.

[0081] e(env): Carbon factor of Ecological Environment Bureau.

[0082] Pin: Total power of the power plant incoming line.

[0083] Ps: total power of the power plant connected to the grid.

[0084] Substituting the above values ​​into the above formula, we obtain e=0.8421437560529.

[0085] Through specific use, the present invention calculates the data of Zhuanghe Station in Dalian City, Liaoning Province on July 1, 2024. Through actual verification, the carbon factor emission calculated by the present invention is 0.8421tCO2 / MWh, and the carbon factor emission value obtained by the existing method is 0.5703tCO2 / MWh. The present invention is closer to the carbon emission factor of the working environment, improves the calculation accuracy of the carbon factor emission, and thus obtains a more accurate carbon factor emission value than the existing technology.

[0086] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for calculating the carbon emission factor of electricity, characterized in that: The steps include: S1: Get raw data; S1-1: The smart grid dispatching control system exports data files offline. The data file contents include: static archive data section, topology information data section, and operating power data section; Static archive data sections include: substation archive data section, generator set archive data section, and load archive data section; The topology information data section includes: substation connection file data section; The operating power data section includes: the active power value data section of the unique line and substation associated with the metering point equipment; S2: File data is entered into the database; Extract the data information of the substation archive data section and create a new substation archive table TableA. TableA records the data information of the substation's unique identifier, substation name, substation type, and reference voltage fields. The carbon emission factor data recorded monthly by all power plants in each region is obtained from the official website of the Ministry of Ecology and Environment. A new ecological and environmental carbon factor management table Table F is created. Table F records the power plant name, month, unit, and ecological and environmental carbon factor data. S3: power statistics; The calculation formula for the total outgoing power Pout of the power plant is as follows: Pout=∑Pn(n∈N+) Where Pn represents the power value transmitted by the power plant to other substations; The calculation formula for the total power Pin of the power plant is as follows: Pin=∑|Pi|(i∈N+) Where Pi represents the power value received by the power plant from other substations; The calculation formula for the total power Ps of the power plant is as follows: Ps=Pout-Pin S4: carbon factor matching; In TableA, there is a data record of a substation type of thermal power station, denoted as R; In TableF, compare the substation name field value of R with the power plant name field value of each data record in the table. If the two are the same, the carbon factor of the substation's on-grid electricity can be calculated using the value of the ecological bureau carbon factor field in this data record using the following carbon factor (e) calculation formula. The power plant carbon factor calculation formula is as follows: Where eL represents the carbon factor of the power plant at the previous level, and e(env) represents the carbon factor of the Ecological Environment Bureau.

2. A system for calculating carbon emission factors of electricity, characterized in that: include: Data acquisition module, data encoding module, power calculation module, carbon factor matching module; M1: Get the original data; M1-1: The data acquisition module exports data files from the smart grid dispatching control system offline. The data file contents include: static archive data section, topology information data section, and operating power data section; Static archive data sections include: substation archive data section, generator set archive data section, and load archive data section; The topology information data section includes: substation connection file data section; The operating power data section includes: the active power value data section of the unique line and substation associated with the metering point equipment; M2: file data is entered into the database; The data input module extracts data information from the substation archive data section and creates a new substation archive table TableA. TableA records data information of the substation's unique identifier, substation name, substation type, and reference voltage fields. Based on the monthly carbon emission factor data of all power plants in each region obtained from the official website of the Ministry of Ecology and Environment, a new ecological environment carbon factor management table TableF is created. The data table maintains data information such as power plant name, month, unit, and ecological environment carbon factor; M3: Power statistics; The power calculation module calculates the total power Pout of the power plant outgoing power as follows: Pout=∑Pn(n∈N+) Where Pn represents the power value transmitted by the power plant to other substations; The power calculation module calculates the total power Pin of the power plant's incoming power using the following formula: Pin=∑|Pi|(i∈N+) Where Pi represents the power value received by the power plant from other substations; The power calculation module calculates the total power Ps of the power plant on-grid electricity as follows: Ps=Pout-Pin M4: Carbon factor matching; In TableA, there is a data record of a substation type of thermal power station, denoted as R; In TableF, the carbon factor matching module compares the substation name field value in R with the power plant name field value in each data record in the table. If the two are the same, the carbon factor of the substation's on-grid electricity can be calculated using the value of the ecological bureau carbon factor field in this data record using the following carbon factor e calculation formula. The power plant carbon factor calculation formula is as follows: Where eL represents the carbon factor of the power plant at the previous level, and e(env) represents the carbon factor of the Ecological Environment Bureau.

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