Electric power carbon emission factor calculation method and system

Abstract

The invention discloses an electric power carbon emission factor calculation method and system, and the method specifically comprises the steps: obtaining a data file, enabling the content of the data file to comprise a static archive data section, a topological information data section and an operation power data section, and carrying out the data storage of the data sections in the file, the power plant on-grid electric quantity total power is calculated according to the power plant outgoing line total power and the power plant incoming line total power, the power plant carbon factor is obtained by introducing carbon factor matching into a power plant carbon factor calculation formula, the strategy is implemented for a power plant with incoming lines and outgoing lines, and the accuracy of calculating the power plant carbon factor is effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon emission of electric power systems, and in particular relates to a method and system for calculating carbon emission factors of electric power. Background Art

[0002] In the power system, power plants are one of the main sources of carbon emissions, and the accurate calculation of their carbon factors is crucial for the overall carbon flow analysis. In the traditional carbon factor calculation, the calculation formula 1 of the power plant carbon emission factor is used: power plant carbon emission factor = power plant carbon emissions / total power generation of each unit in the power plant to calculate the carbon factor of the power plant. In actual situations, the calculation formula 2 of the power plant carbon emission factor should be used: power plant carbon emission factor = power plant carbon emissions / power plant grid-connected electricity to calculate the carbon factor of the power plant. The total power generation of each unit in the power plant is not equal to the grid-connected electricity of the power plant, because in each power plant, not all the power generated by the units will be connected to the grid, and some units will not enter the power system. Therefore, in the traditional carbon factor calculation, the calculation formula 1 of the power plant carbon emission factor is used. At the same time, the practice of treating the total power generation of each unit in the power plant as the total grid-connected electricity of the power plant is flawed, which will lead to inaccurate calculated carbon emission factors of the power plant.

[0003] Smart grid dispatching and control system is an existing intelligent management system in the power grid system, including the dispatching D5000 system. The dispatching D5000 system is an advanced power grid dispatching and management system that can monitor and control the operation of the power grid in real time. The system is widely used in dispatching centers at all levels of the State Grid and is currently a widely used power grid dispatching and control system in the domestic power industry. The D5000 system adopts a distributed architecture and consists of multiple subsystems. The subsystems communicate through the network to achieve data sharing and coordination. The system can collect, process and store a large amount of power grid data in real time, such as voltage, current, power and other indicators. The dispatching D5000 system contains a variety of data files, some of which are stored in the CIME file format. It has functions such as multi-link acquisition, multi-protocol, load balancing, multi-source data acquisition, and data forwarding, and plays an important role in improving the stability, reliability, economy and reducing labor costs of the power grid. Summary of the invention

[0004] The existing technology has a traditional carbon factor calculation that 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 grid-connected 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 content includes: 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 nodes include: substation archive data node, generator set archive data node, load archive data node;

[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, create a new substation archive table TableA, and record the data information of the substation's unique identifier, substation name, substation type and reference voltage field in TableA;

[0014] A new ecological environment carbon factor management table TableF is created for the carbon emission factor data recorded monthly by all power plants in each region obtained from the official website of the Ministry of Ecology and Environment. The data information of the power plant name, month, unit, and ecological environment carbon factor is maintained in the data table.

[0015] S3: power statistics;

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

[0017] Pout=∑Pn(n∈N+)

[0018] In the formula, 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] In the formula, 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, the substation name field value of R is compared 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 be calculated using the value of the ecological bureau carbon factor field in this data record. The carbon factor is calculated 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] A power carbon emission factor calculation system, comprising: 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 offline from the smart grid dispatching control system. The data file content includes: static archive data section, topology information data section, and operating power data section;

[0032] Static archive data nodes include: substation archive data node, generator set archive data node, load archive data node;

[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 of the substation archive data section, creates a new substation archive table TableA, and records data information of the substation's unique identifier, substation name, substation type, and reference voltage field in TableA;

[0037] A new ecological environment carbon factor management table TableF is created for the carbon emission factor data recorded monthly by all power plants in each region obtained from the official website of the Ministry of Ecology and Environment. The data information of the power plant name, month, unit, and ecological environment carbon factor is maintained in the data table.

[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] In the formula, 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 as follows:

[0043] Pin=∑|Pi|(i∈N+)

[0044] In the formula, 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 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 value of the ecological bureau carbon factor field in this data record. The carbon factor is calculated by 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 existing incoming power 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 It is a 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 in the present invention;

[0055] Figure 3 This is a schematic diagram of the electric energy data transmitted from Zhuanghe Station 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] Combined with the attached figure, the carbon factor of the power plant is calculated by taking Zhuanghe Station as an example:

[0058] S1: Get raw data;

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

[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, and the data information of the substation's unique identifier, substation name, substation type and reference voltage field is recorded in TableA;

[0062] Based on the carbon emission factor data recorded monthly by 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 Ecological Environment Bureau is created. The data table maintains the data information of the 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 of 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 electric energy to multiple different power plants and stations. Figure 2 Substituting the starting power of multiple data records shown in into the above formula, we can get the total power of the power plant inlet power 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 get 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 electricity of the substation can use the carbon factor field number of the ecological bureau in this data record. Figure 4 It can be seen that the carbon factor of the Ecological Environment Bureau of Zhuanghe Station in July is e(env) = 0.841743. The carbon factor is calculated by 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] The present invention is specifically used and calculated based on 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, and the calculation accuracy of the carbon factor emission is improved, thereby obtaining a more accurate carbon factor emission value than the prior art.

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

Claims

1. A method for calculating carbon emission factors 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 content includes: static archive data section, topology information data section, and operating power data section; Static archive data nodes include: substation archive data node, generator set archive data node, load archive data node; 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, create a new substation archive table TableA, and record the data information of the substation's unique identifier, substation name, substation type and reference voltage field in TableA; The carbon emission factor data of all power plants in each region recorded monthly from the official website of the Ministry of Ecology and Environment is used to create a new ecological environment carbon factor management table Table F, which records the power plant name, month, unit, and ecological environment carbon factor data information; S3: power statistics; The calculation formula of the total outgoing power Pout of the power plant is as follows: Pout=∑Pn(n∈N+) In the formula, 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+) In the formula, 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, the substation name field value of R is compared 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 be calculated using the value of the ecological bureau carbon factor field in this data record. The carbon factor is calculated using the following carbon factor (e) calculation formula. The power plant carbon factor calculation formula is as follows: In the formula, 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 input module, power calculation module, carbon factor matching module; M1: Get the original data; M1-1: The data acquisition module exports data files offline from the smart grid dispatching control system. The data file content includes: static archive data section, topology information data section, and operating power data section; Static archive data nodes include: substation archive data node, generator set archive data node, load archive data node; 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 of the substation archive data section, creates a new substation archive table TableA, and records data information of the substation's unique identifier, substation name, substation type, and reference voltage field in TableA; A new ecological environment carbon factor management table TableF is created for the carbon emission factor data recorded monthly by all power plants in each region obtained from the official website of the Ministry of Ecology and Environment. The data information of the power plant name, month, unit, and ecological environment carbon factor is maintained in the data table. M3: Power statistics; The power calculation module calculates the total power Pout of the power plant outgoing power as follows: Pout=∑Pn(n∈N+) In the formula, 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 as follows: Pin=∑|Pi|(i∈N+) In the formula, 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 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 value of the ecological bureau carbon factor field in this data record. The carbon factor is calculated by the following carbon factor e calculation formula. The power plant carbon factor calculation formula is as follows: In the formula, 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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