CN115840865A - Carbon emission factor calculation method and carbon footprint metering device, method and system - Google Patents
Carbon emission factor calculation method and carbon footprint metering device, method and system Download PDFInfo
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Abstract
The invention relates to a method for calculating a carbon emission factor of an electric energy transmission node, belongs to the field of carbon emission data metering, and further provides a method for calculating a carbon emission factor, and a device, a method and a system for metering carbon emission. The carbon emission factor calculation method comprises the steps of calculating an average carbon emission factor as a carbon emission factor of an output branch according to the carbon emission factor and input electric quantity of each input branch, and correcting the carbon emission factor according to the carbon emission quantity of sulfur hexafluoride equipment and the electric quantity of the output branch if the output branch relates to the sulfur hexafluoride equipment. The method not only considers the difference of carbon emission information of different input branches of the electric energy transmission node, but also considers the difference of transmission electric quantity of different input branches of the electric energy transmission node, and calculates the average carbon emission factor by integrating the differences, so that the actual condition of the carbon emission factor can be more accurately reflected, and the method has low calculation roughness and high accuracy.
Description
Technical Field
The invention relates to a method for calculating a carbon emission factor of an electric energy transmission node, belongs to the field of carbon emission data metering, and further relates to an electric energy carbon footprint metering device, a metering method and a metering system.
Background
At present, according to the method for accounting greenhouse gas emission of enterprises in China, the total carbon emission of each enterprise consists of four parts of fossil fuel combustion emission of a production system, emission in an industrial production process and outsourcing electric power and thermal power emission, and the specific calculation formula process is as follows: e = E Burning of +E Procedure +E Electric power +E Heating power . The indirect carbon emission (electricity using carbon emission) generated by power consumption mainly comes from direct carbon emission generated in the power generation and transmission processes.
The current electricity consumption carbon emission accounting method mainly adopts a macroscopic statistical method, namely, the product of a carbon emission factor and electricity consumption is adopted to calculate the carbon emission, and the carbon emission of the electricity consumption is estimated by adopting a power grid carbon emission factor and the electricity consumption in the prior art. The power grid carbon emission factor is regularly issued by the official department of the country, the update period of issued data is long, the calculation is rough, the accuracy is low, the real-time performance is poor, the problems of rough and inaccurate performances, poor real-time performance and the like exist correspondingly in the carbon emission accounting method, the change conditions of a power supply structure and the power generation output cannot be effectively reflected in time, the load storage characteristic of a source grid under a novel power system is not considered, the carbon emission per degree of electricity cannot be visually and accurately displayed, and it is difficult to support a user to realize carbon emission reduction by adjusting the electricity utilization behavior.
Disclosure of Invention
The invention aims to provide a method for calculating a carbon emission factor of an electric energy transmission node, which is used for solving the problems of rough calculation and poor accuracy of the carbon emission factor of a power grid in the prior art.
The invention also aims to provide an electric energy carbon footprint metering device to support the execution of the carbon emission factor calculation method.
The invention also aims to provide an electric energy carbon footprint metering method based on energy flow analysis, which executes a carbon emission factor calculation method and realizes carbon footprint metering so as to solve the problems of extensive and inaccurate carbon emission metering and poor real-time performance in the prior art.
The invention also aims to provide an electric energy carbon footprint metering system to support the execution of the electric energy carbon footprint metering method.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the electric carbon emission is closely related to the source of the used electric energy, the electric carbon emission depends on the direct carbon emission generated in the production and transmission process of the used electric energy, the carbon emission measurement of the electric energy production process can follow the prior art, and therefore, the calculation of the carbon emission generated in the electric energy transmission process is the key point of the electric carbon emission measurement. The electric energy transmission carbon emission measurement relates to a carbon emission factor and electric energy transmission electric quantity, wherein the acquisition and measurement of the electric energy transmission electric quantity belong to the prior art, and the key technology of the measurement lies in the calculation of the electric energy transmission carbon emission factor. The invention provides a calculation method for a carbon emission factor of an electric energy transmission node, which adopts the technical scheme comprising the following steps:
a. acquiring carbon emission factors of input branches of the electric energy transmission node and input electric quantity of corresponding input branches, and calculating an average carbon emission factor of the input branches as the carbon emission factor of each output branch of the electric energy transmission node;
b. and c, if the output branch of the electric energy transmission node relates to carbon emission of sulfur hexafluoride equipment, calculating an additional carbon emission factor value according to the carbon emission of the sulfur hexafluoride equipment and the output electric quantity of the output branch, and adding the additional carbon emission factor value to the carbon emission factor of the output branch calculated in the step a.
The calculation method of the carbon emission factor of the electric energy transmission node is designed based on an electric energy transmission architecture from a power generation side to a power utilization side. As shown in fig. 1, the existing power transmission architecture includes 1 to n power transmission nodes (n is greater than or equal to 2), including a starting power transmission node and an intermediate power transmission node, where each power transmission node includes 1 to k input branches and 1 to m output branches (not shown in the figure), and values of k and m are determined according to actual conditions of the power transmission architecture. The input branch of the initial electric energy transmission node is a power generation side outgoing line, the middle electric energy transmission nodes are distributed at the nodes of power transmission, power transformation, power distribution and the like of each grade, and the output branch of the middle electric energy transmission node at the end position is connected with the power utilization node. The power generation side can adopt thermal power, hydroelectric power or electric energy in other forms, and the power utilization node can be divided into a plurality of branches according to different power utilization equipment or units, such as an air conditioner, an illumination device, an elevator, power, an information machine room or other power utilization equipment.
For any power transmission node, the carbon emission (carbon footprint) of the power flowing into the power transmission node is balanced with the carbon emission (carbon footprint) of the power flowing out of the power transmission node according to a balance principle, that is, the carbon emission input of the power transmission node is equal to the carbon emission output of the power transmission node. And if the carbon emission of the sulfur hexafluoride equipment of the power supply branch is not considered, the average carbon emission factor of each input branch of the electric energy transmission node is equal to the carbon emission factor of each output branch. However, considering that the sulfur hexafluoride equipment in the power supply branch generates a certain amount of carbon emission, which causes the amount of carbon emission (carbon footprint) contained in the power supply branch to change when the power is transmitted through the power supply branch, in this case, the carbon emission factors of the output branches of the power transmission node may be different. The method for calculating the carbon emission factor of the electric energy transmission comprises the steps of calculating the average carbon emission factor of all input branches aiming at the carbon emission factor of each input branch of an electric energy transmission node and the input electric quantity of the corresponding input branch, taking the average carbon emission factor as the carbon emission factor of the output branch of the electric energy transmission node, and considering the difference of carbon emission information of the electric energy transmission node from different input branches; and the difference of the transmission electric quantity of different input branches on the electric energy transmission node can be considered. The average carbon emission factor is calculated by integrating the differences, the actual conditions of the carbon emission factor can be considered and reflected more accurately, the calculated roughness is reduced, and the calculation accuracy is improved. In addition, the problem that sulfur hexafluoride equipment possibly exists in the electric energy transmission node to influence the carbon emission factor is also considered, the calculated additional carbon emission factor value is added into the carbon emission factor calculated according to the method, and the carbon emission factor of the output branch of the electric energy transmission node is calculated more accurately. Certainly, if a certain output branch of the electric energy transmission node does not relate to sulfur hexafluoride equipment, which indicates that the problem that the sulfur hexafluoride equipment influences the carbon emission factor calculation does not exist, the calculation in the step b is not needed, and the calculation in the step a is only needed.
There are line losses in the electric energy transmission process, that is, there is a difference between the output electric quantity of the output branch of the electric energy transmission node and the input electric quantity of the input branch of the next electric energy transmission node, that is, the difference between the input electric quantity and the output electric quantity, and these losses also result in a certain carbon emission. According to the method for calculating the carbon emission factor of the electric energy transmission node, when the average carbon emission factor of the input branch of the electric energy transmission node is calculated, the input electric quantity of the input branch is adopted, and when the additional carbon emission factor value of sulfur hexafluoride equipment is calculated, the output electric quantity of the output branch is adopted, so that the carbon emission caused by the electric energy transmission line loss is fully considered in the electric energy transmission process, and the calculation accuracy is higher.
As a further improved technical scheme, the carbon Emission Factor (EF) of the output branch of the electric energy transmission node L ) The following formula can be used for calculation:
EF in formula 2 L The carbon emission factor of one output branch (L-th output branch) of the electric energy transmission node is indicated, and the formula is also suitable for calculation of other output branches. EF in formula 2 j Carbon emission factor, W, for the jth input branch of the power transfer node j For the input electric quantity of the j input branch of the electric energy transmission node, multiplying the carbon emission factor of the j input branch by the electric quantity of the input branch, and dividing the sum of the carbon emission of the 1-k input branches by the sum of the electric quantity of the 1-k input branches to obtain the average carbon emission factor of the input branch of the electric energy transmission node, and taking the average carbon emission factor as the carbon emission factor of the L output branch of the electric energy transmission node. And k is an input branch set of the electric energy transmission node. EF in formula 2 j May be calculated from the last node to which the input branch was connected. W in formula 2 j Metering may be performed by a branch gate meter.
In order to further improve the accuracy of calculation, considering the influence of distributed power source access of the electric energy transmission node on the calculation of the carbon emission factor, the following further improved technical scheme is adopted: if the electric energy transmission node contains the distributed power supply access, the carbon emission factor of the output branch of the electric energy transmission node is calculated by adopting the following formula:
EF in formula 3 L 、EF j 、W j And k has the same meaning as formula 2 and will not be described in detail. EF in formula 3 gi Is the carbon emission factor, W, of the ith distributed power supply gi Multiplying the carbon emission factor of the ith distributed power supply by the electric quantity of the ith distributed power supply for the electric quantity transmitted to the electric energy transmission node by the ith distributed power supply, and then summing the carbon emission quantities of all the distributed power supplies
Sum of electric quantity with distributed power supply->
Integrated into equation 2, the average carbon emission factor of the input leg of the power transfer node containing the distributed power source is calculated. h is the set of distributed power sources. W gi Metering may be performed via the upper gateway port table.
The distributed power supply mainly refers to new energy power sources such as photovoltaic power, wind power and the like which can reduce carbon emission, and the electric power generated by new energy power facilities can correspondingly reduce the emission of greenhouse gases. EF gi The emission factor can be calculated according to the regional power grid reference line.
As a further improved technical scheme, an output branch of the electric energy transmission node relates to sulfur hexafluoride equipment, and a carbon emission factor of the output branch is calculated by adopting the following formula:
EF in formula 4 L The same meanings as those of the above formulae 2 and 3 are given, and they will not be described in detail. In the formula 4, E SF6 The carbon emission generated by sulfur hexafluoride equipment of the output branch (L-th output branch) for the electric energy transmission node can be utilized by SF 6 Monitoring by a sensor; w L The output electric quantity of the output branch (the L-th output branch) which is the electric energy transmission node can be measured through a branch gateway meter. By using E SF6 And W L The carbon emission factor of the sulfur hexafluoride equipment is calculated according to the ratio, namely the additional carbon emission factor value is added, the average carbon emission factor of the input branch calculated by the method is used as the carbon emission factor of the output branch, and the carbon emission factor is calculated more accurately.
In the existing electric energy transmission architecture, the carbon emission factor acquisition ways are different corresponding to different positions of electric energy transmission nodes. The power transmission nodes comprise an initial power transmission node and a middle power transmission node, the last node of the initial power transmission node is a power generation side outgoing line, and the carbon emission factor of the input branch of the corresponding initial power transmission node is the carbon emission factor of the power generation side outgoing line; the intermediate electric energy transmission node is an electric energy transmission node between the initial electric energy transmission node and the user node, the previous node of the intermediate electric energy transmission node is the initial electric energy transmission node or the previous intermediate electric energy transmission node, and according to the principle of balance, the carbon emission factor of the input branch of the corresponding intermediate electric energy transmission node is the carbon emission factor of the output branch of the input branch corresponding to the previous electric energy transmission node.
As a further improved technical solution, the carbon emission factor of the input branch of the initial power transmission node is calculated by using the following formula:
delta in formula 5 g The emission factor of the g group of generating sets can be obtained by looking up a table according to different power generation types; q g Activity data (such as fuel consumption) of the g-th group of generator sets; w g Generating the electric quantity of an internet gateway of the g-th generator set; f is a generator set.
The invention also provides an electric energy carbon footprint metering device which comprises an intelligent electric meter, wherein a carbon metering operation module is arranged in the intelligent electric meter and used for executing the carbon emission factor calculation method of each electric energy transmission node.
The carbon metering operation module is used for executing the electric energy transmission node carbon emission factor calculation methods, and meanwhile, the carbon emission amount can be calculated according to the calculated carbon emission factor and the electric quantity. The smart meter can be designed by the prior art or independently and generally has the basic functions of data acquisition, data calculation and data transmission. The carbon emission calculation module can be independent equipment, or a chip integrated in the intelligent electric meter, or an algorithm or a program in the intelligent electric meter app, in a word, the carbon emission factor and the carbon emission amount of the electric energy transmission node output branch circuit can be calculated after the intelligent electric meter obtains related data, the carbon metering function is added on the basis of electric energy metering by the electric meter, and electric-carbon fusion metering is achieved.
The invention also provides an electric energy carbon footprint metering method based on energy flow analysis, which comprises the following steps:
s1, calculating a carbon emission factor of an output branch of an initial power transmission node according to the calculation method of the carbon emission factor of the power transmission node as claimed in any one of claims 1 to 6, and calculating the carbon emission of the output branch according to the carbon emission factor of the output branch and the line loss quantity of the output branch;
and S2, repeating the step S1 to calculate the carbon emission factor and the carbon emission of each output branch of the next electric energy transmission node until the carbon emission factor and the carbon emission of the output branch of the last electric energy transmission node are calculated.
The invention relates to an electric energy carbon footprint metering method based on energy flow analysis, which is characterized in that electric energy is used as a commodity, and carbon emission or carbon footprint generated in the production, transportation and use processes of the commodity is tracked, namely, a carbon emission factor is utilized to track the specific change condition of the carbon emission of once electricity during transmission through different nodes and different branches. The energy flow analysis is to calculate the sum of carbon emissions carried by each energy flow for different electrical energy flows input by a node, namely the carbon emission input to the node, wherein the carbon emission should be equal to the sum of carbon emissions conducted by each output branch of the node (the carbon emission conducted by a branch is not the carbon emission of the branch), namely the input is equal to the output; if the carbon emission of sulfur hexafluoride equipment exists in the output branch, the newly increased carbon emission needs to be considered, which means that once electricity is polluted when being transmitted through the branch, a certain carbon emission amount is newly increased, and the carbon emission factor calculated by the method is used for reflecting the newly increased carbon emission amount.
According to the electric energy carbon footprint metering method based on energy flow analysis, after the branch carbon emission factor of the electric energy transmission node is obtained, the carbon emission of the power supply branch can be calculated, and the carbon emission of a user can also be calculated. The carbon emission of a power supply branch of the electric energy transmission node is calculated by adopting the product of the carbon emission factor of the output branch and the line loss electric quantity of the output branch; and for the carbon emission amount of the power consumption of the user, calculating by adopting the product of the carbon emission factor of the output branch of the last electric energy transmission node and the power consumption of the user node. The line loss electric quantity is a difference value between input electric quantity and output electric quantity for a power supply branch circuit, and is a difference value between the output electric quantity measured by an output branch circuit gateway meter and the input electric quantity measured by an input branch circuit gateway meter of a next electric energy transmission node for an electric energy output node.
Based on the method for calculating the carbon emission factors of the electric energy transmission nodes, the carbon emission factors and the carbon emission of the output branches of the electric energy transmission nodes are calculated one by one in the electric energy transmission architecture, the calculation is accurate, the accuracy is high, the real-time performance is strong, and the requirement of electric energy transmission carbon emission measurement can be met. As an alternative technical solution, in the method for measuring carbon emission of an electric energy transmission node of the present invention, the initial electric energy transmission node may be an electric energy transmission node to which an outgoing line from the power receiving side is connected, so that the measurement method can achieve the carbon emission of electric energy transmission in the full life cycle, and the initial electric energy transmission node may also be an intermediate electric energy transmission node, so that the measurement method can achieve the carbon emission of a part of transmission paths in the electric energy transmission framework.
The invention also provides an electric energy transmission carbon emission metering system, which comprises a carbon emission metering main node and a plurality of carbon emission metering sub-nodes, wherein the main node is in data transmission connection with each sub-node, each sub-node is used for collecting carbon monitoring data of an electric energy transmission node and calculating a carbon emission factor and a carbon emission amount of each output branch of the electric energy transmission node, and the carbon emission factor of the output branch of the electric energy transmission node adopts the calculation method of the carbon emission factor of the electric energy transmission node according to any one of claims 1 to 6; the main node is used for receiving the carbon emission factors and the carbon emission amount of each output branch of the electric energy transmission node sent by each sub-node, sending the carbon emission factors of each output branch of the electric energy transmission node down to the carbon emission metering sub-node corresponding to the next electric energy transmission node, and calculating the carbon emission factors and the carbon emission amount of each output branch of the next electric energy transmission node.
The carbon monitoring data collected by the child nodes are mainly used for calculating the carbon emission factor and the carbon emission, and at least necessary data required by calculating the electric energy transmission carbon emission factor should be contained.
As a further improved technical scheme, the carbon emission measurement sub-nodes are arranged in a one-to-one correspondence mode according to the electric energy transmission nodes.
As a further improved technical scheme, the carbon emission meter quantum node can adopt the electric energy transmission carbon emission metering device, so that the fused metering of electric quantity and carbon emission is realized, the number of supporting devices required by the construction of a carbon metering system is greatly reduced, and the carbon emission metering device conforms to the double-carbon development situation.
Drawings
FIG. 1 is a schematic diagram of a prior art power transmission architecture;
FIG. 2 is a schematic diagram of a power transfer node;
FIG. 3 is a schematic diagram of a power transfer node for accessing a distributed power supply;
FIG. 4 is a schematic diagram of an embodiment of an electrical energy transfer carbon emissions metering device;
FIG. 5 is a schematic diagram of an embodiment of a power transfer carbon emissions metering method;
FIG. 6 is a schematic block diagram of an embodiment of an electrical energy transfer carbon emissions metering system.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1:
the embodiment is an embodiment of the method for calculating the carbon emission factor of the electric energy transmission node.
As shown in fig. 2, the power transmission node is composed of 1-k input branches and 1-m output branches, and the node at the previous stage is also a power transmission node. In this embodiment, the carbon emission factor of the L-th output branch is taken as an example for calculation. The L-th output branch relates to sulfur hexafluoride equipment, and the calculation needs to consider the carbon emission generated by the sulfur hexafluoride equipment.
Aiming at each input branch of the electric energy transmission nodes, acquiring a carbon emission factor and electric quantity of an output branch of a previous-stage electric energy transmission node of the corresponding input branch; acquiring the carbon emission of sulfur hexafluoride equipment of the L-th output branch; and acquiring the output electric quantity of the L-th output branch.
Carbon emission factor EF of L-th output branch L Calculated using the following formula.
In the formula:
EF j the carbon emission factor of the j input branch of the electric energy transmission node; w j The input electric quantity of the jth input branch of the electric energy transmission node is input;
E SF6 carbon emission of sulfur hexafluoride equipment of the L-th output branch is monitored and obtained by using an SF6 sensor; w L The output electric quantity of the L-th output branch is divided by the output electric quantity of the L-th output branch to obtain the carbon emission factor value of the sulfur hexafluoride device.
k is the input branch set of the electric energy transmission node.
Example 2:
the embodiment is an embodiment of the method for calculating the carbon emission factor of the electric energy transmission node.
This embodiment is substantially the same as embodiment 1, except that the previous node of the power transmission node in embodiment 1 is a power generation side outgoing line, and the carbon emission factor of the input branch is calculated by the following formula:
delta in formula 5 g The emission factors of the g group of generator sets can be obtained by looking up tables according to different power generation types, specifically refer to methods for accounting greenhouse gas emission of enterprises and report guidelines for generating electricity (revised 2021), and coefficients of greenhouse gas emission of Chinese products in full life cycleSet (2022) and related standards; q g Calculating the carbon emission of the g group generator set for activity data (such as fuel consumption) of the g group generator set by multiplying the activity data and the fuel consumption; w g Generating the electric quantity of an internet gateway of the g-th generator set; f is a generator set.
Example 3
The embodiment is an embodiment of the method for calculating the carbon emission factor of the electric energy transmission node.
As shown in fig. 3, the electric energy transmission node of this embodiment is substantially the same as that of embodiment 1, except that 1 to h distributed power sources, specifically, distributed photovoltaic power sources, are connected. The power transmission node is composed of 1-k (k is not shown in the figure) input branches and 1-m (m is not shown in the figure) output branches, and the upper-stage node is also the power transmission node. In this embodiment, the carbon emission factor of the L-th output branch is taken as an example for calculation. The L-th output branch relates to sulfur hexafluoride equipment, and the calculation needs to consider the carbon emission generated by the sulfur hexafluoride equipment.
Aiming at each input branch of the electric energy transmission nodes, acquiring a carbon emission factor and input electric quantity of an output branch of a previous-stage electric energy transmission node of the corresponding input branch; aiming at each connected distributed photovoltaic power supply of the electric energy transmission node, acquiring a carbon emission factor and electric quantity of the corresponding distributed photovoltaic power supply; acquiring the carbon emission of sulfur hexafluoride equipment of the L-th output branch; and acquiring the output electric quantity of the L-th output branch.
Carbon emission factor EF of L-th output branch L Calculated using the following formula.
In the formula EF L 、EF j 、W j 、k、E SF6 、W L The meaning is the same as that of example 1 and will not be described in detail.
In the formula EF gi The carbon emission factor of the ith distributed power supply is calculated according to the regional power grid baseline emission factor, W gi The electric quantity transmitted to the electric energy transmission node for the ith distributed power supply can be measured through the upper gateway port meter, and the carbon emission factor of the ith distributed power supply is multiplied by the electric quantity of the ith distributed power supply, so that the carbon emission quantity of the distributed power supply can be obtained.
h is the set of distributed power sources.
Example 4:
the present embodiment is an embodiment of an electrical energy carbon footprint metering device.
Electric energy carbon footprint metering device includes smart electric meter (the content marked by the solid line in the figure), and smart electric meter can adopt prior art's smart electric meter, can also adopt as the smart electric meter shown in figure 4, including MCU and the display device who is connected with it, ESAM, RTC, RS485, infrared device, memory, power management device, current collector, high accuracy measurement chip etc. wherein high accuracy measurement chip is equipped with voltage sampling module and current sampling module, and battery management device still is connected with the battery. The intelligent electric meter is further provided with a carbon metering operation module (indicated by a dotted line in the figure), and the carbon metering operation module is additionally provided with an app software module on the basis of not changing a hardware structure and is used for calculating a carbon emission factor and a carbon emission amount.
Example 5
The present embodiment is an embodiment of an electrical energy carbon footprint metering method based on energy flow analysis.
As shown in fig. 5, the following steps are calculated for the power transfer architecture:
s1, the power transmission node 1 in the figure 5 is the initial power transmission node, the input branch is the power generation side outlet line, and the power transmission method utilizes
Calculating the carbon emission factors of each input branch of the initial electric energy transmission node one by one, and utilizing
Calculating a carbon emission factor of one output branch, calculating to obtain line loss electric quantity by using a gateway table of the output branch and a gateway table of an input branch of a next electric energy transmission node, and calculating the carbon emission according to the carbon emission factor of the output branch and the line loss electric quantity (multiplication) of the output branch; if the output branch relates to a sulphur hexafluoride installation, the calculation is carried out according to the method of example 1;
s2, aiming at the next electric energy transmission node 2 (not shown in the figure) connected with the electric energy transmission node 1, the carbon emission factor of the input branch of the electric energy transmission node 2 is taken from the carbon emission factor of the output branch connected with the electric energy transmission node 1, the input electric quantity of the input branch is obtained by utilizing a gateway meter of the input branch, and the method adopts
Calculating a carbon emission factor of one output branch of the electric energy transmission nodes 2, calculating and obtaining line loss electric quantity by using a gateway table of the output branch and a gateway table of an input branch of the next electric energy transmission node, and calculating the carbon emission according to the carbon emission factor of the output branch and the line loss electric quantity (multiplication) of the output branch; if the output branch relates to a sulfur hexafluoride device, calculating according to the method of embodiment 1; if the power transmission node 2 is involved in the distributed power access, calculating according to the formula 3; and so on until calculating the carbon emission factor and carbon emission of the output branch of the last electric energy transmission node n; the carbon emission of the output branch of the end position electric energy transmission node is calculated by adopting the product of the carbon emission factor and the line loss electric quantity, the end position electric energy transmission node is connected with a user ammeter, and an output branchThe carbon emission factor of the circuit can also be called as an electricity consumption carbon emission factor at this time, the carbon emission amount of the electricity consumption of the user is calculated by adopting the product of the electricity consumption carbon emission factor and the electricity consumption of the user, and the carbon emission amount of the specific electric equipment is calculated by adopting the product of the carbon emission factor amount of the electricity consumption and the subentry electric quantity of the electric equipment.
Example 6:
this embodiment is an embodiment of the electrical energy carbon footprint metering system of the present invention.
As shown in fig. 6, the electric energy transmission structure adopts a two-stage structure, the electric energy transmission node 1 is a transformer substation in the diagram, an input branch of the transformer substation is connected with a power plant, an output branch of the transformer substation is connected with the electric energy transmission node 2, and the electric energy transmission node 2 is a special transformer area and a public transformer area in the diagram.
As shown in fig. 6, the electric energy carbon footprint metering system of the present embodiment includes a plurality of carbon emission metering sub-nodes, which are correspondingly arranged on each electric energy transmission node; the carbon emission measurement sub-node adopts an intelligent electric meter (carbon meter for short) with a carbon measurement operation module, the carbon meter can collect carbon monitoring data of the electric energy transmission node and calculate the carbon emission factor and the carbon emission amount of each output branch of the electric energy transmission node, wherein the carbon emission factor of the output branch of the electric energy transmission node can be calculated and obtained by adopting the calculation method;
as shown in fig. 6, the electric energy carbon footprint metering system of this embodiment further includes a carbon emission metering master node, which can be connected to all the carbon meters in a data transmission manner, where the connection manner may be a wired connection or a wireless connection, and is used to transmit various carbon detection information, including at least information such as input/output gateway electric quantity information, carbon emission factors, carbon emission amounts, and carbon emission amounts of sulfur hexafluoride devices; the data transmission main node can receive the carbon emission factors and the carbon emission amount of each output branch of the electric energy transmission node sent by each sub-node, and sends the carbon emission factors of each output branch of the electric energy transmission node down to the carbon emission metering sub-node corresponding to the next electric energy transmission node, so as to calculate the carbon emission factors and the carbon emission amount of each output branch of the next electric energy transmission node.
As shown in fig. 6, a carbon meter is also provided in the power plant for acquiring carbon detection data of the power plant and sending the carbon detection data to the master node for supporting calculation of the carbon emission factor and the carbon emission amount of the power transmission node.
Claims (10)
1. A method for calculating a carbon emission factor of an electric energy transmission node is characterized by comprising the following steps: the method comprises the following steps:
a. acquiring carbon emission factors of input branches of the electric energy transmission node and input electric quantity of corresponding input branches, and calculating an average carbon emission factor of the input branches as the carbon emission factor of each output branch of the electric energy transmission node;
b. and c, if the output branch of the electric energy transmission node relates to carbon emission of sulfur hexafluoride equipment, calculating an additional carbon emission factor value according to the carbon emission of the sulfur hexafluoride equipment and the output electric quantity of the output branch, and adding the additional carbon emission factor value to the carbon emission factor of the output branch calculated in the step a.
2. The method for calculating the carbon emission factor of the power transmission node according to claim 1, wherein the carbon emission factor EF of the output branch of the power transmission node L Calculated using the following formula:
in the formula:
EF j the carbon emission factor of the j input branch of the electric energy transmission node;
W j the input electric quantity of the jth input branch of the electric energy transmission node is input;
k is the input branch set of the electric energy transmission node.
3. The method for calculating the carbon emission factor of the power transmission node according to claim 1, wherein if the power transmission node has a distributed power access, the carbon emission factor of the output branch of the power transmission node is calculated by using the following formula:
in the formula:
EF j the carbon emission factor of the j input branch of the electric energy transmission node;
W j the input electric quantity of the jth input branch of the electric energy transmission node is input;
k is an input branch set of the electric energy transmission node;
EF gi a carbon emission factor for the ith distributed power source;
W gi the electric quantity transmitted to the electric energy transmission node for the ith distributed power supply;
h is the set of distributed power sources.
4. The method for calculating the carbon emission factor of the power transmission node according to any one of claims 1 to 3, wherein the carbon emission factor of the output branch of the power transmission node in the step b is calculated by using the following formula:
EF L b, calculating a carbon emission factor of the output branch of the electric energy transmission node for the step a;
E SF6 carbon emission generated by sulfur hexafluoride equipment of the output branch for the electric energy transmission node;
W L the output electric quantity of the output branch circuit which is the electric energy transmission node.
5. The method for calculating the carbon emission factor of the power transmission node according to any one of claims 1 to 3, wherein the power transmission node comprises a starting power transmission node and an intermediate power transmission node, the carbon emission factor of the input branch of the starting power transmission node is the carbon emission factor of the power generation side outlet, and the carbon emission factor of the input branch of the intermediate power transmission node is the carbon emission factor of the output branch corresponding to the last power transmission node of the corresponding input branch.
6. The method for calculating the carbon emission factor of the power transmission node according to claim 5, wherein the carbon emission factor of the input branch of the initial power transmission node is calculated by using the following formula:
in the formula:
δ g the emission factor of the g group of generating sets;
Q g activity data of the g group of generator sets;
W g generating the electric quantity of an internet gateway of the g-th generator set;
f is a generator set.
7. The utility model provides an electric energy carbon footprint metering device, includes smart electric meter, its characterized in that: the intelligent ammeter is provided with a carbon metering operation module which is used for executing the calculation method of the carbon emission factor of the electric energy transmission node according to any one of claims 1-6.
8. An electric energy carbon footprint metering method based on energy flow analysis is characterized by comprising the following steps:
s1, calculating a carbon emission factor of an output branch of an initial power transmission node according to the calculation method of the carbon emission factor of the power transmission node as claimed in any one of claims 1 to 6, and calculating the carbon emission of the output branch according to the carbon emission factor of the output branch and the line loss quantity of the output branch;
and S2, repeating the step S1 to calculate the carbon emission factor and the carbon emission of each output branch of the next electric energy transmission node until the carbon emission factor and the carbon emission of the output branch of the last electric energy transmission node are calculated.
9. An electric energy carbon footprint metering system, characterized in that: the method comprises a main carbon emission metering node and a plurality of sub carbon emission metering nodes, wherein the main node is in data transmission connection with each sub node, the sub nodes are used for collecting carbon monitoring data of an electric energy transmission node and calculating carbon emission factors and carbon emission amount of each output branch of the electric energy transmission node, and the carbon emission factors of the output branches of the electric energy transmission node adopt the method for calculating the carbon emission factors of the electric energy transmission node according to any one of claims 1 to 6; the main node is used for receiving the carbon emission factors and the carbon emission amount of each output branch of the electric energy transmission node sent by each sub-node, sending the carbon emission factors of each output branch of the electric energy transmission node down to the carbon emission metering sub-node corresponding to the next electric energy transmission node, and calculating the carbon emission factors and the carbon emission amount of each output branch of the next electric energy transmission node.
10. The electrical energy carbon footprint metering system of claim 9, wherein: and the carbon emission measurement sub-nodes are arranged in one-to-one correspondence according to the electric energy transmission nodes.
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