A method and system for calibrating a grid-side power carbon emission meter

Abstract

The present application relates to a kind of power grid side electric power carbon emission metering table detection method and system, the method is applied to standard impedance network, it includes: using different standard power source to inject different size of power to the side of standard impedance network, to make power transmission to the node of standard impedance network;The reference indirect carbon emission result and the indirect carbon emission result of detection are obtained simultaneously by the standard carbon metering table and the carbon metering table to be detected respectively through the node by accessing the node;By adjusting the power output of power source, the indirect carbon emission results of two kinds of metering tables are compared multiple times, the maximum measurement error and the uncertainty of carbon metering table to be detected are obtained, and carbon metering table to be detected is detected according to the maximum measurement error and the uncertainty.The present application completes the high-precision detection of carbon metering table to be detected by the high-precision measurement and comparison of the carbon emission data of two kinds of metering tables, solves the technical problem that the existing monitoring method cannot monitor the indirect carbon emission of power system with high precision.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of carbon emission metering of power system, and particularly relates to a grid-side power carbon emission metering meter calibration method and system. BACKGROUND

[0002] At present, relevant research institutions have developed power system full-link carbon emission meters. Different from direct carbon emission metering at the source side, the grid side does not directly produce carbon emissions, but calculates indirect carbon emission metering results through power transmission and indirect carbon emission factor information.

[0003] Since the indirect carbon emission factor needs to be obtained according to network flow analysis results, rather than official data, it is difficult to calibrate the grid-side carbon emission metering meter. So far, there is still no effective calibration method and system to complete the above work at home and abroad. SUMMARY

[0004] (1) Technical problem to be solved

[0005] In view of the above shortcomings and deficiencies of the prior art, the present application provides a grid-side power carbon emission metering meter calibration method and system, which solves the technical problem that the prior art is difficult to calibrate the grid-side carbon emission metering meter.

[0006] (2) Technical solution

[0007] In order to achieve the above purpose, the main technical scheme adopted by the present application includes:

[0008] In the first aspect, the present application provides a grid-side power carbon emission metering meter calibration method, which is applied to a standard impedance network built by a standard inductor and a standard resistor. The method comprises:

[0009] Different standard power sources are used to inject different sizes of power to one side of the standard impedance network, so that the power is transmitted to a node of the standard impedance network;

[0010] The reference indirect carbon emission result and the calibration indirect carbon emission result of the node are obtained by simultaneously measuring through the standard carbon metering meter and the carbon metering meter to be detected connected to the node, respectively;

[0011] By adjusting the output power of the power source, the reference indirect carbon emission results and the calibration indirect carbon emission results of the two meters are compared multiple times, the maximum metering error and the uncertainty of the carbon metering meter to be detected are obtained, and then the carbon metering meter to be detected at the grid side is calibrated according to the maximum metering error and the uncertainty of the carbon metering meter to be detected;

[0012] The reference indirect carbon emission result and the verification indirect carbon emission result are both obtained by the electric energy metering of the node and the indirect carbon emission factor.

[0013] Optionally, before the power is transmitted to a node of the standard impedance network, the method further comprises:

[0014] The high-precision electric energy metering algorithm, the indirect carbon emission factor calculation method and the high-precision indirect carbon emission calculation method are embedded in the standard carbon meter.

[0015] The output power and the carbon emission factor of each standard power source are configured by official data and / or historical measured data.

[0016] Optionally, the reference indirect carbon emission result and the verification indirect carbon emission result of the node are obtained by the standard carbon meter and the to-be-verified carbon meter connected to the node respectively.

[0017] On the side of the standard carbon meter,

[0018] The voltage and current fundamental wave phasor of the node are obtained by using the multi-frequency component decoupling dynamic phasor measurement method.

[0019] The electric energy at the node is calculated according to the voltage and current fundamental wave phasor.

[0020] The voltages and branch currents of all nodes in the standard impedance network are obtained based on the Kirchhoff's law.

[0021] The power / contribution value of each power source to the node is analyzed based on the superposition law and the voltages and branch currents of all nodes.

[0022] The indirect carbon emission factor at the node is obtained according to the carbon emission factor of each power source and the power / contribution value at the node.

[0023] The reference indirect carbon emission result is obtained by multiplying the electric energy at the node and the indirect carbon emission factor.

[0024] On the side of the to-be-verified carbon meter,

[0025] The voltage and current fundamental wave phasor of the node are obtained by using the multi-frequency component decoupling dynamic phasor measurement method.

[0026] The electric energy at the node is calculated according to the voltage and current fundamental wave phasor.

[0027] The voltages and branch currents of all nodes in the standard impedance network are obtained based on the Kirchhoff's law.

[0028] Based on the superposition theorem, the power / energy contribution value of each power source to the node is analyzed one by one in combination with the voltage of all nodes and the branch current;

[0029] According to the carbon emission factor of each power source and the power / energy contribution value at the node, the indirect carbon emission factor at the node is calculated;

[0030] The energy at the node is multiplied by the indirect carbon emission factor to obtain the indirect carbon emission result for verification;

[0031] Wherein,

[0032] The indirect carbon emission factor at the node is calculated by the following formula:

[0033]

[0034] In the formula, F k is the carbon emission factor of each power source, k is the power source number, and the power / energy contribution of each power source to the node is E l,k ;

[0035] The reference indirect carbon emission result or the verification indirect carbon emission result is calculated by the following formula:

[0036] T std =F indirect E l

[0037] In the formula, E l is the energy, and l represents the sampling point time number.

[0038] Optionally, by adjusting the output power of the power source, the reference indirect carbon emission result and the verification indirect carbon emission result of the two kinds of meters are compared multiple times to obtain the maximum measurement error and the uncertainty of the carbon meter to be tested, and then the carbon meter to be tested on the power grid side is verified according to the maximum measurement error and the uncertainty of the carbon meter to be tested, comprising:

[0039] After adjusting the output power of the power source each time, the reference indirect carbon emission result and the verification indirect carbon emission result are subtracted to obtain the measurement error of the carbon meter to be tested;

[0040] The measurement errors of a plurality of carbon meters to be tested are statistically analyzed to obtain the maximum measurement error and the uncertainty of the carbon meter to be tested;

[0041] By comparing the maximum measurement error and the uncertainty of the carbon meter to be tested with the set carbon meter error / uncertainty threshold, the measurement accuracy of the meter to be tested is obtained, so that the verification of the carbon meter to be tested on the power grid side is completed based on the measurement accuracy.

[0042] In a second aspect, the embodiments of the present application provide a power grid side power carbon emission meter calibration system, comprising:

[0043] a standard impedance network constructed by standard inductors and standard resistors;

[0044] a standard power source arranged at one side of the standard impedance network, each of the standard power sources being configured with a corresponding output power and a carbon emission factor for inputting electric energy with different power to the standard impedance network;

[0045] a standard carbon meter connected to a node of the standard impedance network;

[0046] a to-be-tested carbon meter connected to a node of the standard impedance network; and

[0047] a master control module for completing the calibration of the to-be-tested carbon meter by executing the method as described above.

[0048] Optionally, the standard carbon meter and the to-be-tested carbon meter each comprise an electric energy metering module, an indirect carbon emission factor calculation module and an indirect carbon emission calculation module.

[0049] The electric energy metering module is configured to obtain voltage and current fundamental phasors of the node by using a multi-frequency component decoupling dynamic phasor measurement method, and to calculate electric energy at the node according to the voltage and current fundamental phasors.

[0050] The indirect carbon emission factor calculation module is configured to obtain voltages and branch currents of all nodes in the standard impedance network based on Kirchhoff's law, to analyze power / contributions of each power source to the node one by one based on the superposition theorem and in combination with the voltages and branch currents of all nodes, and to obtain an indirect carbon emission factor at the node according to carbon emission factors of the power sources and the power / contributions of the power sources to the node.

[0051] The indirect carbon emission calculation module is configured to multiply the electric energy at the node by the indirect carbon emission factor to obtain a reference indirect carbon emission result or a calibration indirect carbon emission result.

[0052] wherein,

[0053] The indirect carbon emission factor at the node is obtained by the following formula:

[0054]

[0055] wherein, Fk is the carbon emission factor of each power source, k is the power source number, Ek is the power / contribution of each power source to the node, and F is the indirect carbon emission factor at the node. k l,k

[0056] ​​The reference indirect carbon emission result or the verification indirect carbon emission result is calculated by the following formula:

[0057] T std = F indirect E l

[0058] In the formula, E l is electric energy, and I represents the sampling point time number.

[0059] Optionally, the electric energy metering module comprises at least one of a sine interpolation function unit, a virtual exponential function unit and a fundamental wave phasor measurement unit based on a windowed interpolation FFT.

[0060] Optionally, after accessing the same node, the metering work of the standard carbon meter and the carbon meter to be verified is kept at the same time.

[0061] (Three) beneficial effects

[0062] The beneficial effects of the present application are: the present application injects power to the standard impedance network through a standard power source, places a standard carbon meter and a carbon meter to be verified at other nodes of the network, compares the carbon metering results of the standard carbon meter and the carbon meter to be verified, and obtains the carbon emission metering error and uncertainty of the carbon meter to be verified. The present application completes high-precision verification of the carbon meter to be verified through high-precision measurement and comparison of the carbon emission data of the two meters, and solves the technical problem that the existing monitoring method cannot monitor the indirect carbon emission of electric power with high precision. Meanwhile, the present application uses the standard impedance network to simulate the power transmission network in the power system, and uses the standard power source, standard inductor and standard resistor to make the standard carbon meter have traceability. BRIEF DESCRIPTION OF DRAWINGS

[0063] Figure 1 A flowchart of a power grid side electric power carbon emission meter verification method provided by the embodiment of the present application is shown;

[0064] Figure 2 A specific flowchart of step S2 of the power grid side electric power carbon emission meter verification method provided by the embodiment of the present application is shown;

[0065] Figure 3 Another specific flowchart of step S2 of the power grid side electric power carbon emission meter verification method provided by the embodiment of the present application is shown;

[0066] Figure 4 A specific flowchart of step S3 of the power grid side electric power carbon emission meter verification method provided by the embodiment of the present application is shown;

[0067] Figure 5This is a schematic diagram of the composition of a power grid-side electricity carbon emission meter calibration system provided in an embodiment of the present invention. Detailed Implementation

[0068] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0069] like Figure 1 As shown in the embodiment of the present invention, a method for verifying a grid-side electricity carbon emission meter is proposed. The method is applied to a standard impedance network constructed from standard inductors and standard resistors. The method includes: injecting different amounts of power into one side of the standard impedance network using different standard power sources to transmit the power to a node of the standard impedance network; simultaneously calculating the reference indirect carbon emission result and the verification indirect carbon emission result of the node using a standard carbon meter connected to the node and a carbon meter under test, respectively; by adjusting the output power of the power source, comparing the reference indirect carbon emission result and the verification indirect carbon emission result of the two meters multiple times to obtain the maximum measurement error and uncertainty of the carbon meter under test; and then verifying the carbon meter under test located on the grid side based on the maximum measurement error and uncertainty of the carbon meter under test; wherein, the reference indirect carbon emission result and the verification indirect carbon emission result are both obtained by calculating the electricity metering and indirect carbon emission factor of the node.

[0070] This invention injects power into a standard impedance network using a standard power source. A standard carbon meter and a carbon meter under test are placed at another node in the network. By comparing the carbon measurement results of the two meters, the carbon emission measurement error and uncertainty of the carbon meter under test are obtained. This invention achieves high-precision verification of the carbon meter under test through high-precision calculation and comparison of carbon emission data from the two meters, solving the technical problem that existing monitoring methods cannot accurately monitor indirect carbon emissions from the power industry. Furthermore, this invention uses the standard impedance network to simulate the power transmission network in a power system. The use of a standard power source, standard inductor, and standard resistor aims to enable the standard carbon meter to have traceability capabilities.

[0071] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0072] Specifically, the present invention provides a method for verifying a grid-side electricity carbon emission meter, the method comprising:

[0073] S1. Different power sources are used to inject different amounts of power into one side of the standard impedance network so that the power is transmitted to a node of the standard impedance network.

[0074] Furthermore, prior to step S1, the process includes: embedding a high-precision energy metering algorithm, an indirect carbon emission factor calculation method, and a high-precision indirect carbon emission calculation method into a standard carbon meter. Generally, the meter under test already has carbon emission calculation functionality, so embedding the algorithm is unnecessary; and configuring the output power and carbon emission factor of each standard power source using officially provided data and / or historical measured data.

[0075] S2. The reference indirect carbon emission result and the verification indirect carbon emission result of the node are calculated simultaneously by the standard carbon meter and the carbon meter to be tested connected to the node.

[0076] Furthermore, such as Figure 2 As shown, step S2 includes:

[0077] S21A. On the standard carbon meter side, the voltage and current fundamental phasors of the node are obtained by using a dynamic phasor measurement method with multi-frequency component decoupling.

[0078] S22A: The electrical energy at this node is calculated based on the fundamental phasors of voltage and current.

[0079] S23A. Calculate the voltage and branch current of all nodes in a standard impedance network based on Kirchhoff's laws.

[0080] S24A. Based on the superposition law, the power / energy contribution of each power source to the node is analyzed one by one by combining the voltage of all nodes and the branch current.

[0081] S25A. Based on the carbon emission factors of each power source and the power / electrical energy contribution value at the node, calculate the indirect carbon emission factor at the node.

[0082] S26A. Multiply the electrical energy at this node by the indirect carbon emission factor to obtain the reference indirect carbon emission result.

[0083] And, such as Figure 3 As shown, step S2 includes:

[0084] S21B. On the side of the carbon meter to be tested, the fundamental voltage and current phasors of the node are obtained by using a dynamic phasor measurement method with multi-frequency component decoupling.

[0085] S22B, the electrical energy at this node is calculated based on the fundamental voltage and current phasors.

[0086] S23B. Determine the voltage and branch current of all nodes in a standard impedance network based on Kirchhoff's laws.

[0087] S24B. Based on the superposition law, the power / energy contribution of each power source to the node is analyzed one by one by combining the voltage of all nodes and the branch current.

[0088] S25B. Based on the carbon emission factors of each power source and the power / electrical energy contribution value at the node, calculate the indirect carbon emission factor at the node.

[0089] S26B. Multiply the electrical energy at this node by the indirect carbon emission factor to obtain the indirect carbon emission result for verification.

[0090] Generally, carbon emission metering algorithms consist of two parts: electricity metering and indirect carbon emission factor calculation. Multiplying the data from these two parts yields the grid-side carbon emission metering data. However, standard carbon meters require extremely high accuracy in both the electricity metering algorithm and the carbon emission factor calculation method. Therefore, this invention provides a high-precision electricity metering algorithm and an indirect carbon emission factor calculation method for constructing standard carbon meters.

[0091] Considering the significant fluctuations and distortions in the voltage and current waveforms on the grid side due to the high penetration rate of renewable energy, this invention employs a dynamic phasor measurement method with multi-frequency component decoupling to obtain the fundamental phasors of voltage and current, and further calculates the power frequency active power p(l) and electrical energy E. l Where l represents the sampling point time number. Preferably, at least one method based on the sinc interpolation function, the imaginary exponential function, and windowed interpolation FFT can be used to achieve multi-frequency decoupling and dynamic phasor measurement. Different methods have certain differences in computational complexity and accuracy, and the appropriate measurement method can be selected according to the voltage and current waveforms, distortion degree, and the computational load that the chip can withstand in the actual application scenario.

[0092] Indirect carbon emission factor calculation method: Based on Kirchhoff's laws, the current injection equations for each node are written. Since the voltage values ​​of each power source, the reactance values ​​of each standard inductor, and the resistance values ​​of each standard resistor are all known, the voltage and branch current values ​​of each node can be calculated. To analyze the voltage and current contributions of each power source at the installation node of the standard / test carbon meter, the power / energy contribution of each power source at that node can be analyzed one by one based on the superposition law. Then, the indirect carbon emission factor at that node can be calculated by the following formula:

[0093]

[0094] In the formula, F kLet be the carbon emission factor of each power source, k be the power source number, and E be the power / electrical energy contribution of each power source to this node. l,k .

[0095] Furthermore, the indirect carbon emission results for reference or verification are obtained using the following formula:

[0096] T std =F indirect E l

[0097] In the formula, E l For electrical energy, l represents the sampling point time number.

[0098] Since the power sources, inductors, and resistors in the power grid are all standard devices / components, the indirect carbon emission factor calculation results obtained by the present invention through the above-mentioned power grid configuration and calculation method will have high accuracy, and also ensure that the proposed standard carbon meter has traceability capability.

[0099] S3. By adjusting the output power of the power source, the reference indirect carbon emission results and the verification indirect carbon emission results of the two meters are compared multiple times to obtain the maximum measurement error and uncertainty of the carbon meter under test. Then, the carbon meter under test located on the power grid side is verified based on the maximum measurement error and uncertainty of the carbon meter under test.

[0100] Furthermore, such as Figure 4 As shown, step S3 includes:

[0101] S31. After each adjustment of the power source output power, the difference between the reference indirect carbon emission result and the verification indirect carbon emission result is calculated to obtain the measurement error of the carbon meter to be tested.

[0102] S32. Perform statistical analysis on the measurement errors of multiple carbon meters to be tested, and obtain the maximum measurement error and uncertainty of the carbon meters to be tested.

[0103] S33. By comparing the maximum measurement error and uncertainty of the carbon meter under test with the set error / uncertainty threshold of the carbon meter (the set threshold is obtained by relevant specifications or actual application requirements), the measurement accuracy of the meter under test is obtained, and the verification work of the carbon meter under test located on the power grid side is completed based on the measurement accuracy.

[0104] Furthermore, embodiments of the present invention also provide a grid-side electricity carbon emission meter calibration system, comprising:

[0105] A standard impedance network is constructed from standard inductors and standard resistors.

[0106] Standard power sources are set on one side of the standard impedance network. Each standard power source is configured with a corresponding output power and carbon emission factor to input electrical energy of different power into the standard impedance network.

[0107] A standard carbon meter is connected to a node of this standard impedance network.

[0108] The carbon meter to be tested is connected to a node of the standard impedance network; and...

[0109] The main control module is used to complete the verification of the carbon meter under test by executing the verification method of the grid-side electricity carbon emission meter as described above.

[0110] In one specific embodiment, Figure 5 The designed grid-side carbon meter calibration system was demonstrated, in which L1, L2…L n …L N There are N standard inductors; R1, R2…R n …R N N standard resistors and standard inductors form a standard impedance network. On one side of this network, K standard power sources are configured, and the carbon emission factor of each power source is assumed to be known (this is based on the fact that, in reality, the carbon emission factor of each power plant can be obtained through officially provided data or actual measurement). On the other side of the network, a standard carbon meter and the carbon meter to be tested are connected. The purpose of using standard power sources, standard inductors, and standard resistors is to ensure the traceability of the standard carbon meter. This invention uses this standard impedance network to simulate the power transmission network in a power system.

[0111] Different power sources inject varying amounts of power into the standard impedance network, which is then transmitted to the other side. A standard carbon meter and a carbon meter under test, both configured at a specific node, can then measure the indirect carbon emissions at that node. By subtracting the carbon emission measurement results from the standard carbon meter and the carbon meter under test, the measurement error of the carbon meter under test is obtained, thus completing the verification of the grid-side carbon emission meter.

[0112] Next, both the standard carbon meter and the carbon meter under test include: an electricity metering module, an indirect carbon emission factor calculation module, and an indirect carbon emission calculation module. The functions of each module are described in detail below:

[0113] The power metering module is used to obtain the fundamental voltage and current phasors of the node using a dynamic phasor measurement method with multi-frequency component decoupling, and to calculate the power at the node based on the fundamental voltage and current phasors.

[0114] The indirect carbon emission factor calculation module is used to obtain the voltage and branch current of all nodes in the standard impedance network based on Kirchhoff's laws; based on the superposition law, it analyzes the power / energy contribution of each power source to the node by combining the voltage and branch current of all nodes; and calculates the indirect carbon emission factor at the node based on the carbon emission factor of each power source and the power / energy contribution at the node.

[0115] The indirect carbon emission calculation module is used to multiply the electrical energy at this node by the indirect carbon emission factor to obtain the indirect carbon emission result for reference or verification.

[0116] in,

[0117] The indirect carbon emission factor at this node is calculated using the following formula:

[0118]

[0119] In the formula, F k Here, E represents the carbon emission factor of each power source, k is the power source number, and E represents the emission factor of each power source. l,k The power / energy contribution of each power source to this node;

[0120] The indirect carbon emission results for reference or verification can be obtained using the following formula:

[0121] T std =F indirect E l

[0122] In the formula, E l For electrical energy, l represents the sampling point time number.

[0123] Subsequently, the power metering module includes at least one of the following: a fundamental phasor measurement unit based on sinc interpolation function, an imaginary exponential function, or windowed interpolation FFT.

[0124] Furthermore, after connecting to the same node, the standard carbon meter and the carbon meter under test perform their measurement work simultaneously. Both types of meters complete the calculation of carbon emission data concurrently, ensuring the accuracy of subsequent verification operations.

[0125] In summary, this invention provides a method and system for verifying electricity carbon emission meters on the power grid side, the overall process of which includes:

[0126] Step 1: Construct a standard electrical network containing a standard power source, a standard inductor, and a standard resistor. Select a network node and connect both a standard carbon meter and the carbon meter to be tested to that node.

[0127] Step 2: Embed a high-precision energy metering algorithm, an indirect carbon emission factor calculation method, and a high-precision indirect carbon emission calculation method into a standard carbon meter. Specifically, this invention establishes a high-precision grid-side carbon emission metering method based on a standard power network: an energy metering algorithm with multi-frequency component decoupling is used to measure energy, and the grid-side indirect carbon emission factor is calculated based on the standard power network topology. Multiplying the energy and the indirect carbon emission factor yields the grid-side carbon emission metering result.

[0128] Step 3: Set the output power and carbon emission factor of each standard power source, and input electrical energy of different power into the power grid.

[0129] Step 4: The standard carbon meter and the carbon meter under test are used to measure indirect carbon emissions at the same time to obtain data.

[0130] Step 5: Compare the carbon emission measurement results of the standard carbon meter and the carbon meter under test to obtain the measurement error of the carbon meter under test. By adjusting the output power of the power source, compare the carbon emission measurement results of the two meters multiple times to obtain the maximum measurement error and uncertainty of the carbon meter under test.

[0131] Therefore, the method and system provided by this invention enable high-precision calculation of indirect carbon emission data and verification of carbon meters to be tested, which is helpful for the scientific measurement and evaluation of carbon emissions from electrical equipment and power systems.

[0132] Since the systems / devices described in the above embodiments of the present invention are systems / devices used to implement the methods of the above embodiments of the present invention, those skilled in the art can understand the specific structure and modifications of the systems / devices based on the methods described in the above embodiments of the present invention, and therefore will not be repeated here. All systems / devices used in the methods of the above embodiments of the present invention fall within the scope of protection of the present invention.

[0133] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0134] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, as well as combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions.

[0135] It should be noted that any reference numerals placed between parentheses in the claims should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In claims that enumerate several means, several of these means may be embodied by the same hardware. The use of the terms first, second, third, etc., is merely for convenience of expression and does not indicate any order. These terms can be understood as part of the component names.

[0136] Furthermore, it should be noted that in the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0137] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the claims should be interpreted to include both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0138] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, then this invention should also include these modifications and variations.

Claims

1. A method for verifying a grid-side electricity carbon emission meter, characterized in that, The method is applied to a standard impedance network constructed from standard inductors and standard resistors, and the method includes: Configure the output power and carbon emission factor of each standard power source using official data and / or historical measured data; Different power sources are used to inject different amounts of power into one side of a standard impedance network so that the power is transmitted to a node of the standard impedance network. The reference indirect carbon emission results and the verification indirect carbon emission results for this node are calculated simultaneously using both the standard carbon meter and the carbon meter under test connected to the node. This includes: obtaining the fundamental voltage and current phasors of the node using a multi-frequency component decoupling dynamic phasor measurement method on the standard carbon meter side; calculating the electrical energy at the node based on the fundamental voltage and current phasors; determining the voltage and branch current of all nodes in the standard impedance network based on Kirchhoff's laws; analyzing the power / electrical energy contribution of each power source to the node based on the superposition law and the voltage and branch current of all nodes; and determining the indirect carbon emission factor at the node based on the carbon emission factors of each power source and the power / electrical energy contribution value at the node. The electrical energy at the node is multiplied by the indirect carbon emission factor to obtain the indirect carbon emission result for reference. On the side of the carbon meter to be tested, the fundamental voltage and current phasors of the node are obtained using a dynamic phasor measurement method with multi-frequency component decoupling. The electrical energy at the node is calculated based on the fundamental voltage and current phasors. The voltage and branch current of all nodes in the standard impedance network are obtained based on Kirchhoff's laws. Based on the superposition law, the power / electrical energy contribution of each power source to the node is analyzed one by one, combining the voltage and branch current of all nodes. The indirect carbon emission factor at the node is obtained based on the carbon emission factor of each power source and the power / electrical energy contribution of the node. The electrical energy at the node is multiplied by the indirect carbon emission factor to obtain the indirect carbon emission result for verification. By adjusting the output power of the power source, the reference indirect carbon emission results and the verification indirect carbon emission results of the two meters are compared multiple times to obtain the maximum measurement error and uncertainty of the carbon meter under test. Then, the carbon meter under test located on the power grid side is verified based on the maximum measurement error and uncertainty of the carbon meter under test. The reference indirect carbon emission results and the verification indirect carbon emission results are both obtained by measuring the electricity consumption and indirect carbon emission factors at the nodes.

2. The method for verifying grid-side electricity carbon emission meters as described in claim 1, characterized in that, Injecting different amounts of power into one side of a standard impedance network using different standard power sources, so that the power is transmitted to a node of the standard impedance network, also includes: High-precision energy metering algorithms, indirect carbon emission factor calculation methods, and high-precision indirect carbon emission calculation methods are embedded in standard carbon meters.

3. The method for verifying grid-side electricity carbon emission meters as described in claim 1, characterized in that, The indirect carbon emission factor at this node is calculated using the following formula: ； In the formula, F k The carbon emission factor for each power source. k The power sources are numbered, and each power source contributes power / energy to this node. E l,k ; The indirect carbon emission results for reference or verification can be obtained using the following formula: ； In the formula, E l For electrical energy, l Indicates the sampling point time number.

4. The method for verifying grid-side electricity carbon emission meters as described in any one of claims 1-3, characterized in that, By adjusting the output power of the power source, and repeatedly comparing the reference indirect carbon emission results and the verification indirect carbon emission results of the two meters, the maximum measurement error and uncertainty of the carbon meter under test are obtained. Then, based on the maximum measurement error and uncertainty of the carbon meter under test, the carbon meter located on the power grid side is verified, including: After each adjustment of the power source output power, the difference between the reference indirect carbon emission results and the verification indirect carbon emission results is calculated to obtain the measurement error of the carbon meter to be tested. Statistical analysis was performed on the measurement errors of multiple carbon meters to be tested to obtain the maximum measurement error and uncertainty of the carbon meters to be tested. By comparing the maximum measurement error and uncertainty of the carbon meter under test with the set error / uncertainty threshold for the carbon meter, the measurement accuracy of the meter under test is obtained, and the calibration of the carbon meter under test located on the power grid side is completed based on the measurement accuracy.

5. A calibration system for a grid-side electricity carbon emission meter, characterized in that, include: A standard impedance network is constructed from standard inductors and standard resistors; Standard power sources are set on one side of the standard impedance network. Each standard power source is configured with a corresponding output power and carbon emission factor to input electrical energy of different power into the standard impedance network. A standard carbon meter is connected to a node of this standard impedance network; The carbon meter to be tested is connected to a node of the standard impedance network; and... The main control module is used to complete the calibration of the carbon meter under test by executing the method described in any one of claims 1-4.

6. The grid-side electricity carbon emission meter calibration system as described in claim 5, characterized in that, Both the standard carbon meter and the carbon meter under test include: an electricity metering module, an indirect carbon emission factor calculation module, and an indirect carbon emission calculation module; The power metering module is used to obtain the fundamental voltage and current phasors of the node using a dynamic phasor measurement method with multi-frequency component decoupling, and to calculate the power at the node based on the fundamental voltage and current phasors. The indirect carbon emission factor calculation module is used to obtain the voltage and branch current of all nodes in the standard impedance network based on Kirchhoff's laws; based on the superposition law, it analyzes the power / energy contribution of each power source to the node by combining the voltage and branch current of all nodes; and calculates the indirect carbon emission factor at the node based on the carbon emission factor of each power source and the power / energy contribution at the node. The indirect carbon emission calculation module is used to multiply the electrical energy at this node by the indirect carbon emission factor to obtain the indirect carbon emission result for reference or the indirect carbon emission result for verification. in, The indirect carbon emission factor at this node is calculated using the following formula: ； In the formula, F k The carbon emission factor for each power source. k Number the power source. E l,k The power / energy contribution of each power source to this node; The indirect carbon emission results for reference or verification can be obtained using the following formula: ； In the formula, E l For electrical energy, l Indicates the sampling point time number.

7. The grid-side electricity carbon emission meter calibration system as described in claim 6, characterized in that, The power metering module includes at least one of the following: a sinc interpolation function unit, a virtual exponential function unit, and a fundamental phasor measurement unit based on windowed interpolation FFT.

8. The grid-side electricity carbon emission meter calibration system as described in any one of claims 5-7, characterized in that, After being connected to the same node, the measurement work of the standard carbon meter and the carbon meter under test is carried out at the same time.

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