Power system node carbon emission factor monitoring method and device based on line parameter correction, terminal equipment and storage medium

Abstract

The invention discloses a power system node carbon emission factor monitoring method and device based on line parameter correction, terminal equipment and a storage medium, and belongs to the technical field of carbon emission factor monitoring. The method comprises the following steps: acquiring relevant parameters of nodes of the power system in real time, performing iterative calculation to obtain a node power deviation value of the power system, and if the node power deviation value at the current moment is smaller than a preset deviation threshold value or the number of times of calculating the node power deviation value at present is larger than a preset number-of-times threshold value, determining that the node power deviation value is larger than the preset number-of-times threshold value. Taking the node voltage amplitude, the node phase difference, the node mutual conductance and the node mutual susceptance at the current moment as corrected line parameter values of the nodes of the power system; and finally, calculating a node carbon emission factor of the power system according to the corrected line parameter value, the node net input active power, the generator output, the generator carbon emission intensity and the node total load active power. According to the invention, the problem that the carbon emission factor monitoring error is too large in the prior art can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon emission factor monitoring, and in particular to a method, device, terminal equipment and storage medium for monitoring carbon emission factors of power system nodes based on line parameter correction. Background Art

[0002] As global climate change becomes increasingly serious, carbon emission control and management are becoming a key focus. As a major source of carbon emissions, monitoring and forecasting carbon emissions from the power system are crucial for achieving a low-carbon economy and protecting the environment. Accurately monitoring and forecasting carbon emission factors in the power system not only helps formulate scientific and rational carbon reduction strategies, but also guides power dispatch and operation, optimizes energy utilization, and reduces the carbon footprint.

[0003] The existing carbon emission factor monitoring method mainly relies on static models and fixed parameters, and cannot reflect the changes in the operating status of the power system in real time. Therefore, there is a problem of large errors in the monitoring results. Summary of the Invention

[0004] The present invention provides a method, device, terminal equipment and storage medium for monitoring the carbon emission factor of power system nodes based on line parameter correction, which can solve the problem of large monitoring error of the node carbon emission factor in the prior art.

[0005] An embodiment of the present invention provides a method for monitoring carbon emission factors of power system nodes based on line parameter correction, comprising:

[0006] Real-time acquisition of node power measurement values, node self-conductance, and node self-susceptance of power system nodes;

[0007] When each node power measurement value, node self-conductance, and node self-susceptance is obtained, the node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference, and node self-conductance at the previous moment are calculated, as well as the node power calculation value at the current moment.

[0008] Calculate the difference between the current node power measurement value and the current node power calculation value to obtain the current node power deviation value;

[0009] If the node power deviation value at the current moment is less than the preset deviation threshold, or the number of times the node power deviation value is currently calculated is greater than the preset number threshold, the node voltage amplitude, node phase difference, node mutual conductance, and node mutual susceptance at the current moment are used as the corrected line parameter values of the power system node;

[0010] Obtain the node's net input active power, generator output, generator carbon emission intensity, and the node's total load active power;

[0011] The node carbon emission factor of the power system is calculated based on the above-mentioned corrected line parameter values, node net input active power, generator output, generator carbon emission intensity, and node total load active power.

[0012] Furthermore, the node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference at the current moment, and the node power calculation value at the current moment are calculated based on the node power deviation value, node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference at the previous moment, node self-conductance at the current moment, and node self-susceptance at the current moment, including:

[0013] Based on the node power deviation value, node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference at the previous moment, and the node self-susceptance at the current moment, the node mutual conductance correction value, node mutual susceptance correction value, node phase difference correction value, and node voltage amplitude correction value at the previous moment are calculated;

[0014] The node mutual conductance, node mutual susceptance, node phase difference, and node voltage amplitude at the current moment are calculated based on the node mutual conductance correction amount, node mutual susceptance correction amount, node phase difference, and node voltage amplitude at the previous moment;

[0015] The node power calculation value at the current moment is calculated based on the node mutual conductance, node mutual susceptance, node phase difference, node voltage amplitude, node self-susceptance and node self-conductance at the current moment.

[0016] Furthermore, the node carbon emission factor of the power system is calculated based on the above-mentioned corrected line parameter values, node net input active power, generator output, generator carbon emission intensity, and node total load active power, including:

[0017] According to the above corrected line parameter values, the branch output power is calculated;

[0018] According to the net input active power of the above nodes and the output power of the above branches, the power flow distribution matrix is calculated;

[0019] The carbon emission factor of the above-mentioned node is calculated based on the above-mentioned generator output, generator carbon emission intensity, node total load active power, and power flow distribution matrix.

[0020] Furthermore, after calculating the above-mentioned node carbon emission factors, it also includes:

[0021] Compare the above node carbon emission factors with the preset threshold;

[0022] When the carbon emission factor of the above-mentioned node is greater than the above-mentioned preset threshold, the user is reminded to use low-carbon electricity to reduce the total carbon emissions.

[0023] Based on the above method embodiment, the present invention provides a corresponding device embodiment;

[0024] The present invention provides a device for monitoring carbon emission factors of power system nodes based on line parameter correction, comprising:

[0025] Node parameter acquisition module, node parameter calculation module, power deviation calculation module, line parameter value correction module, data acquisition module, and node carbon emission factor monitoring module;

[0026] The node parameter acquisition module is used to obtain the node power measurement value, node self-conductance, and node self-susceptance of the power system node in real time;

[0027] The node parameter calculation module is configured to calculate the node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference, and node power calculation value at the current moment based on the node power deviation value, node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference, node self-conductance, and node self-susceptance at the previous moment, each time a node power measurement value, node self-conductance, and node self-susceptance are obtained;

[0028] The power deviation calculation module is used to calculate the difference between the node power measurement value at the current moment and the node power calculation value at the current moment to obtain the node power deviation value at the current moment;

[0029] The line parameter value correction module is configured to use the node voltage amplitude, node phase difference, node mutual conductance, and node mutual susceptance at the current moment as the corrected line parameter values of the power system node if the node power deviation value at the current moment is less than a preset deviation threshold, or the number of times the node power deviation value is currently calculated is greater than a preset number threshold;

[0030] The data acquisition module is used to obtain the node net input active power, generator output, generator carbon emission intensity, and node total load active power;

[0031] The node carbon emission factor monitoring module is used to calculate the node carbon emission factor of the power system based on the corrected line parameter values, node net input active power, generator output, generator carbon emission intensity, and node total load active power.

[0032] Furthermore, the node parameter calculation module includes:

[0033] A node parameter correction calculation unit, a node electrical parameter calculation unit, and a power calculation value calculation unit;

[0034] The node parameter correction value calculation unit is configured to calculate the node mutual conductance correction value, node mutual susceptance correction value, node phase difference correction value, and node voltage amplitude correction value at the previous moment based on the node power deviation value, node voltage amplitude, node mutual conductance, node mutual susceptance, and node phase difference at the previous moment, and the node self-susceptance at the current moment;

[0035] The node electrical parameter calculation unit is configured to calculate the node mutual conductance, node mutual susceptance, node phase difference, and node voltage amplitude at the current moment based on the node mutual conductance correction amount, node mutual susceptance correction amount, node phase difference correction amount, node voltage amplitude correction amount, node mutual conductance, node mutual susceptance, node phase difference, and node voltage amplitude at the previous moment;

[0036] The power calculation value calculation unit is used to calculate the node power calculation value at the current moment based on the node mutual conductance, node mutual susceptance, node phase difference, node voltage amplitude, node self-susceptance and node self-conductance at the current moment.

[0037] Furthermore, the node carbon emission factor monitoring module includes:

[0038] Branch output power calculation unit, power flow distribution matrix calculation unit, and node carbon emission factor calculation unit;

[0039] The branch output power calculation unit is used to calculate the branch output power according to the corrected line parameter value;

[0040] The power flow distribution matrix calculation unit is used to calculate the power flow distribution matrix according to the net input active power of the node and the output power of the branch;

[0041] The node carbon emission factor calculation unit is used to calculate the node carbon emission factor based on the generator output, the generator carbon emission intensity, the node total load active power, and the power flow distribution matrix.

[0042] Furthermore, it also includes:

[0043] The carbon emission factor early warning unit is used to compare the carbon emission factor of the above-mentioned node with the preset threshold; when the carbon emission factor of the above-mentioned node is greater than the above-mentioned preset threshold, it reminds the user to use low-carbon electricity to reduce total carbon emissions.

[0044] Based on the above method embodiment, the present invention provides a corresponding terminal device embodiment;

[0045] The present invention provides a terminal device, including a processor, a memory, and a computer program stored in the above-mentioned memory and configured to be executed by the above-mentioned processor. When the above-mentioned processor executes the above-mentioned computer program, it implements the above-mentioned method for monitoring the carbon emission factor of power system nodes based on line parameter correction in any embodiment of the present invention.

[0046] Based on the above method embodiment, the present invention provides a storage medium embodiment;

[0047] The present invention provides a storage medium comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, the method for monitoring the carbon emission factor of a power system node based on line parameter correction according to any embodiment of the present invention is implemented.

[0048] The embodiments of the present invention have the following beneficial effects:

[0049] The present invention provides a method, device, terminal equipment and storage medium for predicting carbon emission factors of power system nodes based on line parameter correction. The method comprises: first, obtaining the node power measurement value, node self-conductance and node self-susceptance of the power system node in real time; then, when each node power measurement value, node self-conductance and node self-susceptance are obtained, the node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference, node self-conductance at the previous moment and node self-susceptance at the current moment are calculated; then, the node power at the current moment is calculated. The difference between the power measurement value and the node power calculation value at the current moment is used to obtain the node power deviation value at the current moment; then if the node power deviation value at the current moment is less than the preset deviation threshold, or the number of times the node power deviation value is currently calculated is greater than the preset number threshold, the node voltage amplitude, node phase difference, node mutual conductance and node mutual admittance at the current moment are used as the corrected line parameter value of the power system node; then the node net input active power, generator output, generator carbon emission intensity, and node total load active power are obtained; finally, according to the above-mentioned corrected line parameter value, node net input active power, generator output, generator carbon emission intensity, and node total load active power, the node carbon emission factor of the power system is calculated. Therefore, the present invention dynamically obtains the real-time relevant parameters of the power system node multiple times, iteratively calculates the node power deviation value of the power system, until the node power deviation value meets the preset accuracy requirement, thereby realizing the dynamic correction of the line-related parameters of the power system, and then makes the node carbon emission factor calculated according to the corrected line parameter value match the current power system operation state, reducing the monitoring error of the carbon emission factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the implementation. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0051] Figure 1 It is a flow chart of a method for monitoring carbon emission factors of power system nodes based on line parameter correction provided by one embodiment of the present invention.

[0052] Figure 2 This is a schematic diagram of power system flow analysis provided by one embodiment of the present invention.

[0053] Figure 3It is a structural diagram of a power system node carbon emission factor monitoring device based on line parameter correction provided by one embodiment of the present invention.

[0054] Figure 4 This is a topological diagram of an application system for a carbon emission factor provided in an embodiment of the invention. DETAILED DESCRIPTION

[0055] To make the objectives, technical solutions, and advantages of this application more clear, the technical solutions in this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0057] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0058] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0059] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0060] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0061] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0062] See also Figure 1 To address the problem of large errors in carbon emission factor monitoring results in the prior art, an embodiment of the present invention provides a method for monitoring carbon emission factors of power system nodes based on line parameter correction, comprising:

[0063] Step S101: obtaining node power measurement values, node self-conductance, and node self-susceptance of power system nodes in real time;

[0064] Specifically, the node power measurement value can be directly measured by using relevant power measurement instruments, such as power transmitters, electric energy meters, etc.

[0065] Step S102: When each node power measurement value, node self-conductance, and node self-susceptance is obtained, the node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference at the previous moment, and the node self-conductance and node self-susceptance at the current moment are calculated to obtain the node power calculation value at the current moment;

[0066] In a preferred embodiment, the node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference at the current moment, and the calculated value of the node power at the current moment are calculated based on the node power deviation value, node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference at the previous moment, node self-conductance at the current moment, and node self-susceptance at the current moment, including:

[0067] Based on the node power deviation value, node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference at the previous moment, and the node self-susceptance at the current moment, the node mutual conductance correction value, node mutual susceptance correction value, node phase difference correction value, and node voltage amplitude correction value at the previous moment are calculated;

[0068] Specifically, the node power deviation value includes the node active power deviation value and the node reactive power deviation value; the node power calculation value includes the node active power calculation value and the node reactive power calculation value; and the node power measurement value includes the node active power measurement value and the node reactive power measurement value. The node mutual conductance correction value, node mutual susceptance correction value, node phase difference correction value, and node voltage amplitude correction value at the previous moment are calculated according to the following formula:

[0069]

[0070] Where, represents the mutual conductance correction between nodes i and j at the k-1th moment, represents the mutual susceptance correction between nodes i and j at the k-1th moment, It represents the node phase difference correction between node i and node j at the k-1th moment, represents the node voltage amplitude correction value of node i at the k-1th moment, represents the node voltage amplitude correction value of node j at the k-1th moment, represents the calculated active power value of node i at the k-1th moment, represents the mutual conductance between nodes i and j at the k-1th moment, represents the mutual susceptance between nodes i and j at the k-1th moment, represents the node phase difference between node i and node j at the k-1th moment, represents the node voltage amplitude of node i at the k-1th moment, represents the node voltage amplitude of node j at the k-1th moment, It represents the calculated reactive power value of node i at the k-1th moment.

[0071] Specifically, in the above formula is the generalized inverse operation of the Jacobian matrix. The values of each element in the matrix are calculated according to the following formula:

[0072]

[0073] Where, It represents the node self-susceptance of node i at the k-1th moment.

[0074] The node mutual conductance, node mutual susceptance, node phase difference, and node voltage amplitude at the current moment are calculated based on the node mutual conductance correction amount, node mutual susceptance correction amount, node phase difference correction amount, and node voltage amplitude correction amount at the previous moment, as well as the node mutual conductance, node mutual susceptance, node phase difference, and node voltage amplitude;

[0075] Specifically, the node mutual conductance, node mutual susceptance, node phase difference, and node voltage amplitude at the current moment are calculated according to the following formula:

[0076]

[0077] Where, represents the mutual conductance between nodes i and j at the kth moment, represents the mutual susceptance between nodes i and j at the kth moment, represents the node phase difference between node i and node j at the kth moment, represents the node voltage amplitude of node i at the kth moment, It represents the node voltage amplitude of node j at the kth moment.

[0078] The node power calculation value at the current moment is calculated based on the node mutual conductance, node mutual susceptance, node phase difference, node voltage amplitude, node self-susceptance and node self-conductance at the current moment.

[0079] Specifically, the node power calculation value at the current moment is calculated according to the following formula:

[0080]

[0081] Where, represents the calculated active power value of node i at the kth moment, represents the node self-conductance of node i at the kth moment, represents the calculated reactive power value of node i at the kth moment, It represents the node self-susceptance of node i at the kth moment.

[0082] In this preferred embodiment, the node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference at the previous moment, the node self-conductance at the current moment, and the node self-susceptance at the current moment are calculated to obtain the node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference, and the node power calculation value at the current moment.

[0083] Step S103: Calculate the difference between the current node power measurement value and the current node power calculation value to obtain the current node power deviation value;

[0084] Specifically, the node active power deviation value at the current moment is obtained based on the difference between the node active power measurement value at the current moment and the node active power calculation value at the current moment; the node reactive power deviation value at the current moment is obtained based on the difference between the node reactive power measurement value at the current moment and the node reactive power calculation value at the current moment.

[0085] Specifically, the node power deviation value at the current moment is calculated according to the following formula:

[0086]

[0087] Where, Indicates the active power deviation value of node i at the kth moment, P i m represents the measured active power value of node i at the kth moment, Indicates the reactive power deviation value of node i at the kth moment, It represents the reactive power measurement value of node i at the kth moment.

[0088] Step S104: If the node power deviation value at the current moment is less than the preset deviation threshold, or the number of times the node power deviation value is currently calculated is greater than the preset number threshold, the node voltage amplitude, node phase difference, node mutual conductance, and node mutual susceptance at the current moment are used as the corrected line parameter values of the power system node;

[0089] Specifically, if the active power deviation value of the node at the current moment and the reactive power deviation value of the node are less than the preset deviation threshold; or, the number of times the node power deviation value is currently calculated is greater than the preset number threshold, the corrected line parameter value of the power system node is obtained.

[0090] Step S105: Obtaining the node net input active power, generator output, generator carbon emission intensity, and node total load active power;

[0091] Step S106: Calculate the node carbon emission factor of the power system based on the corrected line parameter values, node net input active power, generator output, generator carbon emission intensity, and node total load active power.

[0092] In a preferred embodiment, the node carbon emission factor of the power system is calculated based on the corrected line parameter values, the node net input active power, the generator output, the generator carbon emission intensity, and the node total load active power, including:

[0093] According to the above corrected line parameter values, the branch output power is calculated;

[0094] Specifically, the branch output power is calculated according to the following formula:

[0095]

[0096] Where, P ji Indicates the output power of branch ji at node j. If it is an input branch, this value is negative. ij represents the output power of branch ij at node i, Represents the power loss of branch ij, V Fi Indicates the node voltage amplitude of node i in the corrected line parameter value, V Fj Indicates the node voltage amplitude of node j in the corrected line parameter value, G ij The node mutual conductance between node i and node j in the modified line parameter value is represented by Θ ij The node phase difference between node i and node j in the corrected line parameter value, B ij It represents the mutual admittance between nodes i and j in the corrected line parameter value.

[0097] Schematically, the power system flow analysis diagram is as follows Figure 2 As shown, Figure 2 In the figure, G1-Gn represent the power generation nodes in the power system, M1-Mn represent the load nodes in the power system, and the power transmission network of the entire power system is formed by connecting the power generation nodes and the load nodes. The method shown in the present invention dynamically obtains the real-time relevant parameters of the power system nodes and performs iterative calculations to output the node mutual conductance, node mutual susceptance, and node self-conductance G. ii Node self-susceptance B ii , node voltage amplitude and node phase difference, and then use the node voltage amplitude, node phase difference, node mutual conductance and node mutual admittance as the corrected line parameter values of the power system nodes. Combined with the branch output power on the power generation side and the power loss on the line where it is located, the branch output power on the other side connected to it, that is, the load side, is calculated.

[0098] According to the net input active power of the above nodes and the output power of the above branches, the power flow distribution matrix is calculated;

[0099] Specifically, the power flow distribution matrix is calculated according to the following formula:

[0100] F=D / C -1

[0101] Where F represents the power flow distribution matrix, and the matrix D∈R n×n and C∈R n×n (R represents a real matrix, n represents the matrix dimension, that is, the number of nodes n) the element D in the i-th row and j-th column ij and C ij They are:

[0102]

[0103] Among them, P di =P ai -P li represents the net input active power of node i, P ai is the total active power output of the generator at node i, P li is the total load active power of node i; P nj represents the net output active power of node j, i - represents the set of sending-end nodes of all incoming lines to node i;

[0104] The carbon emission factor of the above-mentioned node is calculated based on the above-mentioned generator output, generator carbon emission intensity, node total load active power, and power flow distribution matrix.

[0105] Specifically, the node carbon emission factor is calculated according to the following formula:

[0106]

[0107] Where, δ i represents the node carbon emission factor of node i, S s represents the set of generator nodes, S d represents the load side node set; δ gix represents the carbon emission intensity of the x-th generator at node i, P gix represents the generator output of the xth generator at node i, F i represents the i-th row vector of the power flow distribution matrix, and diag{δ} represents δ∈R n The diagonal matrix of δ represents the node carbon emission factor vector, P s Represents the node net output active power vector, P si Indicates P s The i-th element of .

[0108] In this preferred embodiment, the node carbon emission factor of the power system is calculated based on the above-mentioned corrected line parameter values, node net input active power, generator output, generator carbon emission intensity, and node total load active power.

[0109] In another preferred embodiment, after calculating the above-mentioned node carbon emission factor, the method further includes:

[0110] Compare the above node carbon emission factors with the preset threshold;

[0111] When the carbon emission factor of the above-mentioned node is greater than the above-mentioned preset threshold, the user is reminded to use low-carbon electricity to reduce the total carbon emissions.

[0112] Specifically, the calculated node carbon emission factor of the power system can be displayed on the user's electricity meter or the electricity management APP interface. The user can make decisions on his or her own electricity consumption behavior based on his or her own node carbon emission factor at the current moment. That is, when the node carbon emission factor is greater than the preset threshold, it means that the carbon emissions generated by electricity consumption at this time exceed the standard, thereby guiding users to use low-carbon electricity and reduce overall carbon emissions.

[0113] Schematically, the topology of the carbon emission factor application system is as follows: Figure 3 As shown, Figure 3 Each node in the grid represents a bus in the power system. Since carbon emissions are only related to power supply, Figure 3 The connection of loads in the power system is omitted, and only the connection of power sources is shown. Among them, nodes 1, 2, 5, and 13 are connected to thermal power, node 8 is connected to hydropower, and node 11 is connected to wind power.

[0114] Based on the above method embodiments, the present invention provides corresponding device embodiments.

[0115] like Figure 4 As shown, based on the above method embodiment, a corresponding device embodiment is provided;

[0116] An embodiment of the present invention provides a device for monitoring carbon emission factors of power system nodes based on line parameter correction, comprising:

[0117] Node parameter acquisition module, node parameter calculation module, power deviation calculation module, line parameter value correction module, data acquisition module, and node carbon emission factor monitoring module;

[0118] The node parameter acquisition module is used to obtain the node power measurement value, node self-conductance, and node self-susceptance of the power system node in real time;

[0119] The node parameter calculation module is configured to calculate the node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference, and node power calculation value at the current moment based on the node power deviation value, node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference, node self-conductance, and node self-susceptance at the previous moment, each time a node power measurement value, node self-conductance, and node self-susceptance are obtained;

[0120] The power deviation calculation module is used to calculate the difference between the node power measurement value at the current moment and the node power calculation value at the current moment to obtain the node power deviation value at the current moment;

[0121] The line parameter value correction module is configured to use the node voltage amplitude, node phase difference, node mutual conductance, and node mutual susceptance at the current moment as the corrected line parameter values of the power system node if the node power deviation value at the current moment is less than a preset deviation threshold, or the number of times the node power deviation value is currently calculated is greater than a preset number threshold;

[0122] The data acquisition module is used to obtain the node net input active power, generator output, generator carbon emission intensity, and node total load active power;

[0123] The node carbon emission factor monitoring module is used to calculate the node carbon emission factor of the power system based on the corrected line parameter values, node net input active power, generator output, generator carbon emission intensity, and node total load active power.

[0124] In a preferred embodiment, the node parameter calculation module includes:

[0125] A node parameter correction calculation unit, a node electrical parameter calculation unit, and a power calculation value calculation unit;

[0126] The node parameter correction value calculation unit is configured to calculate the node mutual conductance correction value, node mutual susceptance correction value, node phase difference correction value, and node voltage amplitude correction value at the previous moment based on the node power deviation value, node voltage amplitude, node mutual conductance, node mutual susceptance, and node phase difference at the previous moment, and the node self-susceptance at the current moment;

[0127] The node electrical parameter calculation unit is configured to calculate the node mutual conductance, node mutual susceptance, node phase difference, and node voltage amplitude at the current moment based on the node mutual conductance correction amount, node mutual susceptance correction amount, node phase difference correction amount, node voltage amplitude correction amount, node mutual conductance, node mutual susceptance, node phase difference, and node voltage amplitude at the previous moment;

[0128] The power calculation value calculation unit is used to calculate the node power calculation value at the current moment based on the node mutual conductance, node mutual susceptance, node phase difference, node voltage amplitude, node self-susceptance and node self-conductance at the current moment.

[0129] In another preferred embodiment, the node carbon emission factor monitoring module includes:

[0130] Branch output power calculation unit, power flow distribution matrix calculation unit, and node carbon emission factor calculation unit;

[0131] The branch output power calculation unit is used to calculate the branch output power according to the corrected line parameter value;

[0132] The power flow distribution matrix calculation unit is used to calculate the power flow distribution matrix according to the net input active power of the node and the output power of the branch;

[0133] The node carbon emission factor calculation unit is used to calculate the node carbon emission factor based on the generator output, the generator carbon emission intensity, the node total load active power, and the power flow distribution matrix.

[0134] In another preferred embodiment, it further comprises:

[0135] The carbon emission factor early warning unit is used to compare the carbon emission factor of the above-mentioned node with the preset threshold; when the carbon emission factor of the above-mentioned node is greater than the above-mentioned preset threshold, it reminds the user to use low-carbon electricity to reduce total carbon emissions.

[0136] It can be understood that the above-mentioned device embodiment corresponds to the method embodiment of the present invention, which can implement a power system node carbon emission factor monitoring method based on line parameter correction provided by any of the above-mentioned method embodiments of the present invention.

[0137] It should be noted that the device embodiments described above are merely illustrative, and some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment. Furthermore, in the drawings of the device embodiments provided by the present invention, the connection relationship between modules indicates that they have a communication connection, which may be implemented as one or more communication buses or signal lines. Those skilled in the art can understand and implement the present invention without inventive effort.

[0138] Based on the above-mentioned embodiment of a method for monitoring carbon emission factors of power system nodes based on line parameter correction, another embodiment of the present invention provides a terminal device, which includes a processor, a memory, and a computer program stored in the above-mentioned memory and configured to be executed by the above-mentioned processor. When the above-mentioned processor executes the above-mentioned computer program, it implements a method for monitoring carbon emission factors of power system nodes based on line parameter correction according to any embodiment of the present invention.

[0139] For example, in this embodiment, the computer program may be divided into one or more modules, which are stored in the memory and executed by the processor to implement the present invention. The one or more modules may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution process of the computer program in the device.

[0140] The terminal device may be a computing device such as a desktop computer, a notebook computer, a PDA, or a cloud server. The device may include, but is not limited to, a processor and a memory;

[0141] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor. The processor is the control center of the device, connecting the various parts of the device using various interfaces and lines.

[0142] The above-mentioned memory can be used to store the above-mentioned computer programs and / or modules. The above-mentioned processor realizes various functions of the above-mentioned device by running or executing the computer programs and / or modules stored in the above-mentioned memory, and calling the data stored in the memory. The above-mentioned memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one application required for a function, etc.; in addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage device.

[0143] On the basis of the above-mentioned method embodiment, another embodiment of the present invention provides a computer-readable storage medium, including a stored computer program, wherein when the above-mentioned computer program is running, the device where the above-mentioned computer-readable storage medium is located is controlled to execute the above-mentioned method for monitoring carbon emission factors of power system nodes based on line parameter correction in any one of the above-mentioned method embodiments of the present invention.

[0144] Wherein, the module / unit integrated in the above-mentioned device / terminal equipment, if implemented in the form of a software functional unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the process in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The above-mentioned computer program can be stored in a computer-readable storage medium, and when the computer program is executed by the processor, it can implement the steps of the above-mentioned various method embodiments. Wherein, the above-mentioned computer program includes computer program code, and the above-mentioned computer program code can be in source code form, object code form, executable file or some intermediate form. The above-mentioned computer-readable medium may include: any entity or device capable of carrying the above-mentioned computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0145] The above are preferred embodiments of the present invention. It should be noted that ordinary technicians in this technical field can make several improvements and modifications without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for monitoring carbon emission factors of power system nodes based on line parameter correction, characterized in that: include: Obtaining real-time node power measurement values, node self-conductance, and node self-susceptance of power system nodes; When each node power measurement value, node self-conductance, and node self-susceptance is obtained, the node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference, and node self-conductance at the previous moment are calculated, as well as the node power calculation value at the current moment. Calculate the difference between the current node power measurement value and the current node power calculation value to obtain the current node power deviation value; If the node power deviation value at the current moment is less than the preset deviation threshold, or the number of times the node power deviation value is currently calculated is greater than the preset number threshold, the node voltage amplitude, node phase difference, node mutual conductance, and node mutual susceptance at the current moment are used as the corrected line parameter values of the power system node; Obtain the node's net input active power, generator output, generator carbon emission intensity, and the node's total load active power; The node carbon emission factor of the power system is calculated based on the corrected line parameter values, the node net input active power, the generator output, the generator carbon emission intensity, and the node total load active power.

2. The method for monitoring carbon emission factors of power system nodes based on line parameter correction according to claim 1, characterized in that: The node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference, and node power calculation value at the current moment are calculated based on the node power deviation value, node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference, node self-conductance, and node self-susceptance at the current moment at the previous moment, including: Based on the node power deviation value, node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference at the previous moment, and the node self-susceptance at the current moment, the node mutual conductance correction value, node mutual susceptance correction value, node phase difference correction value, and node voltage amplitude correction value at the previous moment are calculated; The node mutual conductance, node mutual susceptance, node phase difference, and node voltage amplitude at the current moment are calculated based on the node mutual conductance correction, node mutual susceptance correction, node phase difference correction, node voltage amplitude correction, node mutual conductance, node mutual susceptance, and node phase difference at the previous moment. The node power calculation value at the current moment is calculated based on the node mutual conductance, node mutual susceptance, node phase difference, node voltage amplitude, node self-susceptance and node self-conductance at the current moment.

3. The method for monitoring carbon emission factors of power system nodes based on line parameter correction according to claim 2, characterized in that: The node carbon emission factor of the power system is calculated based on the corrected line parameter value, the node net input active power, the generator output, the generator carbon emission intensity, and the node total load active power, including: Calculating the branch output power according to the corrected line parameter value; Calculating a power flow distribution matrix based on the node net input active power and the branch output power; The node carbon emission factor is calculated based on the generator output, the generator carbon emission intensity, the node total load active power, and the power flow distribution matrix.

4. The method for monitoring carbon emission factors of power system nodes based on line parameter correction according to claim 3 is characterized in that: After calculating the node carbon emission factor, it also includes: Comparing the node carbon emission factor with a preset threshold; When the carbon emission factor of the node is greater than the preset threshold, the user is reminded to use low-carbon electricity to reduce total carbon emissions.

5. A power system node carbon emission factor monitoring device based on line parameter correction, characterized in that: include: Node parameter acquisition module, node parameter calculation module, power deviation calculation module, line parameter value correction module, data acquisition module, and node carbon emission factor monitoring module; The node parameter acquisition module is used to obtain the node power measurement value, node self-conductance, and node self-susceptance of the power system node in real time; The node parameter calculation module is configured to calculate the node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference, and node power calculation value at the current moment based on the node power deviation value, node voltage amplitude, node mutual conductance, node mutual susceptance, node phase difference, node self-conductance, and node self-susceptance at the previous moment, each time a node power measurement value, node self-conductance, and node self-susceptance are obtained; The power deviation calculation module is used to calculate the difference between the node power measurement value at the current moment and the node power calculation value at the current moment to obtain the node power deviation value at the current moment; The line parameter value correction module is configured to use the node voltage amplitude, node phase difference, node mutual conductance, and node mutual susceptance at the current moment as the corrected line parameter value of the power system node if the node power deviation value at the current moment is less than a preset deviation threshold, or the number of times the node power deviation value is currently calculated is greater than a preset number threshold; The data acquisition module is used to obtain the node net input active power, generator output, generator carbon emission intensity, and node total load active power; The node carbon emission factor monitoring module is used to calculate the node carbon emission factor of the power system based on the corrected line parameter value, the node net input active power, the generator output, the generator carbon emission intensity, and the node total load active power.

6. The device for monitoring carbon emission factors of power system nodes based on line parameter correction according to claim 5, characterized in that: The node parameter calculation module includes: A node parameter correction calculation unit, a node electrical parameter calculation unit, and a power calculation value calculation unit; The node parameter correction amount calculation unit is used to calculate the node mutual conductance correction amount, node mutual susceptance correction amount, node phase difference correction amount, and node voltage amplitude correction amount at the previous moment based on the node power deviation value, node voltage amplitude, node mutual conductance, node mutual susceptance, and node phase difference at the previous moment, and the node self-susceptance at the current moment; The node electrical parameter calculation unit is configured to calculate the node mutual conductance, node mutual susceptance, node phase difference, and node voltage amplitude at the current moment based on the node mutual conductance correction amount, node mutual susceptance correction amount, node phase difference correction amount, node voltage amplitude correction amount, node mutual conductance, node mutual susceptance, node phase difference, and node voltage amplitude at the previous moment; The power calculation value calculation unit is used to calculate the node power calculation value at the current moment based on the node mutual conductance, node mutual susceptance, node phase difference, node voltage amplitude, node self-susceptance and node self-conductance at the current moment.

7. The device for monitoring carbon emission factors of power system nodes based on line parameter correction according to claim 6, characterized in that: The node carbon emission factor monitoring module includes: Branch output power calculation unit, power flow distribution matrix calculation unit, and node carbon emission factor calculation unit; The branch output power calculation unit is used to calculate the branch output power according to the corrected line parameter value; The power flow distribution matrix calculation unit is used to calculate the power flow distribution matrix according to the node net input active power and the branch output power; The node carbon emission factor calculation unit is used to calculate the node carbon emission factor according to the generator output, the generator carbon emission intensity, the node total load active power, and the power flow distribution matrix.

8. The device for monitoring carbon emission factors of power system nodes based on line parameter correction according to claim 7, characterized in that: Also includes: A carbon emission factor early warning unit, configured to compare the carbon emission factor of the node with a preset threshold; When the carbon emission factor of the node is greater than the preset threshold, the user is reminded to use low-carbon electricity to reduce total carbon emissions.

9. A terminal device, characterized in that: The method comprises a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, it implements a method for monitoring carbon emission factors of power system nodes based on line parameter correction as described in any one of claims 1 to 4.

10. A storage medium, characterized in that: The storage medium includes a stored computer program, wherein when the computer program is running, the device where the storage medium is located is controlled to execute a method for monitoring carbon emission factors of power system nodes based on line parameter correction as described in any one of claims 1 to 4.

Images