CN106056416B - Method and device for calculating power transmission price of extra-high voltage alternating current power grid node - Google Patents

Method and device for calculating power transmission price of extra-high voltage alternating current power grid node Download PDF

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CN106056416B
CN106056416B CN201610507787.XA CN201610507787A CN106056416B CN 106056416 B CN106056416 B CN 106056416B CN 201610507787 A CN201610507787 A CN 201610507787A CN 106056416 B CN106056416 B CN 106056416B
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高效
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Abstract

The invention discloses a method and a device for calculating the transmission price of an extra-high voltage alternating current power grid node, wherein the method comprises the following steps: collecting a tidal current value of each branch in a target power grid comprising a plurality of power grid nodes and a total power value of each power grid node; obtaining a downstream distribution matrix of a target power grid based on the tidal current value and the total power value; obtaining a power flow contribution value of each power grid node to each branch in the target power grid by using a downstream distribution matrix of the target power grid; according to the power flow contribution value, obtaining the sharing proportion of each power grid node to the power transmission charge of each branch in the target power grid; obtaining the total power transmission charge of each power grid node in the target power grid based on the apportionment proportion; and obtaining the power transmission price of each power grid node in the target power grid by using the total power transmission charge and the node electric quantity of each power grid node in the target power grid.

Description

Method and device for calculating power transmission price of extra-high voltage alternating current power grid node
Technical Field
The invention relates to the technical field of power price calculation, in particular to a method and a device for calculating the power transmission price of an extra-high voltage alternating current power grid node.
Background
At present, in the strategic structure adjustment of energy in regions, ultra-high voltage power transmission is the main scheme of energy supply in regions with energy shortage.
In the ultra-high voltage transmission line, the total power transmission charge of each ultra-high voltage alternating current line is distributed to each sub-power grid according to the parameter proportion such as the electric quantity or power transmitted to each sub-power grid by the line, the sales electric quantity of each sub-power grid and the like, and the power transmission charge of each sub-power grid is divided by the electric quantity received by the sub-power grid from the ultra-high voltage transmission line, namely the power transmission price of the sub-power grid.
The existing operated extra-high voltage alternating current line is not formed into a net, the transmission price is one-line and one-price, but a calculation scheme aiming at the transmission price of each grid node in the extra-high voltage alternating current grid is not provided.
Disclosure of Invention
In view of the above, the present invention provides a method and a device for calculating power transmission rates of nodes of an extra-high voltage ac power grid, so as to solve the technical problem that power transmission rates of nodes of each power grid in the extra-high voltage ac power grid cannot be calculated in the prior art.
The invention provides a method for calculating the power transmission price of an extra-high voltage alternating current power grid node, which comprises the following steps:
collecting a tidal current value of each branch in a target power grid and a total power value of each power grid node, wherein the target power grid comprises a plurality of power grid nodes;
obtaining a downstream distribution matrix of the target power grid based on the tidal current value and the total power value;
obtaining a power flow contribution value of each power grid node to each branch in the target power grid by using the downstream distribution matrix of the target power grid;
obtaining the allocation proportion of each power grid node to the power transmission charge of each branch in the target power grid according to the power flow contribution value;
obtaining the total power transmission charge of each power grid node in the target power grid based on the apportionment proportion;
and acquiring the power transmission price of each power grid node in the target power grid by using the total power transmission charge and the node electric quantity of each power grid node in the target power grid.
The above method, preferably, further comprises:
obtaining the sum of the total power transmission charge of the power grid nodes in the target power grid;
and calculating the average power transmission price of the power grid nodes in the target power grid by using the sum of the total power transmission fees of the power grid nodes in the target power grid and the sum of the electric quantity of the nodes.
Preferably, the obtaining a forward flow distribution matrix of the target grid based on the tidal current value and the total power value includes:
by using
Figure BDA0001035257320000021
And
Figure BDA0001035257320000022
obtaining a downstream distribution matrix of the target power grid;
wherein L isi-Is an incoming line set, P, of a grid node i in the target gridijThe load flow value of a branch ij in the target power grid is represented by i as a first node of the branch ij, j as a last node of the branch ij, and PiFor the total power of grid nodes i in the target gridValue, PjIs the total power value, P, of the grid node j in the target gridGiIs the power supply power value of the target power grid node i, i is a positive integer which is more than or equal to 1 and less than n, n is the number of the power grid nodes in the target power grid, [ A ]d]ijAnd distributing a matrix for the downstream of the target power grid branch ij.
Preferably, the method for obtaining the power flow contribution value of each power grid node to each branch in the target power grid by using the downstream distribution matrix of the target power grid includes:
by using
Figure BDA0001035257320000023
Obtaining a power flow contribution value of each power grid node to each branch in the target power grid;
wherein [ A ]d -1]ijTranspose of downstream distribution matrix, P, for the target grid branch ijkIs the total power value, P, of the grid node kij,kAnd obtaining the power flow contribution value of the power grid node k in the target power grid to each branch ij.
Preferably, the method for obtaining the apportionment proportion of the power transmission fee of each branch from each power grid node in the target power grid according to the power flow contribution value includes:
by using
Figure BDA0001035257320000031
And Cij,kObtaining the sharing proportion of the power transmission fee of each branch by each power grid node in the target power grid as 0(k as i);
wherein, Cij,kAnd the apportionment proportion of the power transmission fee of the power grid node k to the branch circuit ij in the target power grid is obtained.
Preferably, the method for obtaining the total power transmission fee of each grid node in the target grid based on the apportionment ratio includes:
by using
Figure BDA0001035257320000032
Obtaining the target power gridThe total power transmission charge of each grid node;
wherein, FijThe transmission charge, F, of branch ij in the target power gridkAnd the total power transmission charge of the grid node k in the target grid is obtained.
The invention also provides a device for calculating the power transmission price of the extra-high voltage alternating current grid node, which comprises:
the power value acquisition unit is used for acquiring the tidal current value of each branch in a target power grid and the total power value of each power grid node, and the target power grid comprises a plurality of power grid nodes;
the distribution matrix obtaining unit is used for obtaining a downstream distribution matrix of the target power grid based on the tidal current value and the total power value;
the power flow contribution obtaining unit is used for obtaining power flow contribution values of each branch circuit of each power grid node in the target power grid by using the downstream distribution matrix of the target power grid;
the apportionment proportion obtaining unit is used for obtaining the apportionment proportion of the power transmission fee of each branch circuit by each power grid node in the target power grid according to the power flow contribution value;
the power transmission charge obtaining unit is used for obtaining the total power transmission charge of each power grid node in the target power grid based on the apportionment proportion;
and the target power transmission price obtaining unit is used for obtaining the power transmission price of each power grid node in the target power grid by using the total power transmission cost and the node electric quantity of each power grid node in the target power grid.
The above apparatus, preferably, further comprises:
and the average power transmission price calculating unit is used for obtaining the total sum of the total power transmission charges of the power grid nodes in the target power grid, and calculating the average power transmission price of the power grid nodes in the target power grid by using the total sum of the total power transmission charges of the power grid nodes in the target power grid and the total sum of the node electric quantity.
Preferably, in the apparatus, the allocation matrix obtaining unit is specifically configured to: by using
Figure BDA0001035257320000033
And
Figure BDA0001035257320000034
obtaining a downstream distribution matrix of the target power grid;
wherein L isi-Is an incoming line set, P, of a grid node i in the target gridijThe load flow value of a branch ij in the target power grid is represented by i as a first node of the branch ij, j as a last node of the branch ij, and PiIs the total power value, P, of the grid node i in the target gridjIs the total power value, P, of the grid node j in the target gridGiIs the power supply power value of the target power grid node i, i is a positive integer which is more than or equal to 1 and less than n, n is the number of the power grid nodes in the target power grid, [ A ]d]ijAnd distributing a matrix for the downstream of the target power grid branch ij.
The above apparatus, preferably, the power flow contribution obtaining unit is specifically configured to: by using
Figure BDA0001035257320000041
Obtaining a power flow contribution value of each power grid node to each branch in the target power grid;
wherein [ A ]d -1]ijTranspose of downstream distribution matrix, P, for the target grid branch ijkIs the total power value, P, of the grid node kij,kAnd the current contribution value of the power grid node k in the target power grid to the branch ij is obtained.
The above apparatus, preferably, the apportionment ratio obtaining unit is specifically configured to: by using
Figure BDA0001035257320000042
And Cij,kObtaining the sharing proportion of the power transmission fee of each branch by each power grid node in the target power grid as 0(k as i);
wherein, Cij,kAnd the apportionment proportion of the power transmission fee of the power grid node k to the branch circuit ij in the target power grid is obtained.
The above apparatus, preferably, the power transmission fee obtaining unit is specifically configured to: by using
Figure BDA0001035257320000043
Obtaining the total power transmission charge of each power grid node in the target power grid;
wherein, FijThe transmission charge, F, of branch ij in the target power gridkAnd the total power transmission charge of the grid node k in the target grid is obtained.
According to the scheme, the extra-high voltage alternating current power grid node power transmission price calculating method and device provided by the invention have the advantages that the forward flow distribution matrix of the power grid is calculated, the power flow contribution value of each node to each branch in the power grid is further obtained, the sharing proportion of each node to the power transmission price of each branch is further obtained, therefore, the total power transmission cost of each node in the power grid is further obtained by utilizing the sharing proportion, and the power transmission price of each node is calculated by utilizing the node electric quantity of each node, so that the purpose of the invention is realized. The method is different from the scheme for setting the one-line and one-price power transmission price in the prior art, the power transmission price is shared only according to the load of a user or the amount of power consumption, the distance of power transmission distance is not considered, the difference of sharing proportion is not considered, the power transmission price level is not different, and the set power transmission price is inaccurate.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a node topology diagram of an extra-high voltage AC power grid;
fig. 2 and fig. 3 are respectively a flowchart of a method for calculating the transmission price of an extra-high voltage ac grid node according to an embodiment of the present invention;
fig. 4 and fig. 5 are schematic structural diagrams of a device for calculating the transmission price of the extra-high voltage ac grid node according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a diagram of a transmission line of an extra-high voltage ac power grid, where the extra-high voltage ac power grid is composed of multiple power grids, and if the national extra-high voltage ac power grid is composed of multiple provincial power grids, each power grid has multiple power grid nodes, where a power grid node refers to a collection point of multiple branches in the power grid. Each branch in the power grid refers to each branch in the power grid through which the same current can pass.
The method is characterized in that the operated extra-high voltage AC lines are to form networks, the power transmission price is one line and one price, namely, the total power transmission charge of each extra-high voltage AC line is distributed to each power grid according to the parameter proportion of the electric quantity or power transmitted to each power grid by the line, the sales electric quantity of each power grid and the like, and the power transmission charge born by each power grid is divided by the electric quantity received by the power grid from the extra-high voltage, namely the power transmission price. In the scheme for calculating the power transmission price, the positions of a transmitted power injection point and a transmitted power outflow point are not considered no matter how far and near the power transmission distance, and the power transmission price is only shared according to the load of a user or the amount of power consumption, so that the power transmission price is not accurately calculated. Moreover, an extra-high voltage alternating current line cannot visually reflect the economy of power transmission to each power grid if the power transmission price level of each power grid for power transmission of the extra-high voltage alternating current line is not different, and meanwhile, each line respectively formulates the power transmission price without considering the effect of the power grid on the optimal configuration of power resources.
Aiming at the defects, parameters such as the contribution of an extra-high voltage alternating current power grid to the power flow of each node in the power grid are comprehensively considered to calculate the power transmission price in the power grid, so that the accuracy of calculating the power transmission price is improved.
Fig. 2 is a flowchart of a method for calculating power transmission rates of extra-high voltage ac power grid nodes according to an embodiment of the present invention, which is suitable for calculating power transmission rates of power grid nodes in each power grid in fig. 1, and specifically, for a certain power grid shown in fig. 1 as a target power grid, the method in this embodiment may include the following steps:
s201: and collecting the tidal current value of each branch in the target power grid and the total power value of each power grid node.
The power flow value can be understood as the active current value of each branch in the target power grid.
S202: and acquiring a downstream distribution matrix of the target power grid based on the tidal current value and the total power value.
The embodiment of the invention obtains a downstream distribution matrix, which specifically comprises the following steps:
by using
Figure BDA0001035257320000061
And
Figure BDA0001035257320000062
and obtaining a downstream distribution matrix of the target power grid through calculation.
Wherein L isi-Is an incoming line set, P, of a grid node i in a target gridijThe load flow value of a branch ij in a target power grid is represented, the first node of the branch ij is i, the last node of the branch ij is j, PiIs the total power value, P, of the grid node i in the target gridjIs the total power value, P, of the grid node j in the target gridGiIs the power supply power value of the target power grid node i, i is a positive integer which is more than or equal to 1 and less than n, n is the number of the power grid nodes in the target power grid, [ A ]d]ijAnd distributing a matrix for the downstream of the target power grid branch ij.
S203: and obtaining the power flow contribution value of each power grid node to each branch in the target power grid by using the downstream distribution matrix of the target power grid.
The power flow contribution value of each power grid node in the target power grid to each branch refers to the active power caused by each power grid node in the branch power flow. The power flow contribution value is determined based on a forward flow distribution matrix, and specifically comprises the following steps:
by using
Figure BDA0001035257320000063
And obtaining the power flow contribution value of each power grid node to each branch in the target power grid.
Wherein [ A ]d -1]ijTranspose of downstream distribution matrix for target grid branch ij, PkIs the total power value, P, of the grid node kij,kAnd the power flow contribution value of the power grid node k in the target power grid to the branch ij is shown.
S204: and obtaining the sharing proportion of the power transmission fee of each branch by each power grid node in the target power grid according to the power flow contribution value.
The embodiment of the invention can adopt a downstream tracking method for calculation. It should be noted that the grid node at the beginning of the branch is not using the transmission function of the branch. For example, the power flow on a branch AB flows from node a to node B, and both ends a and B are connected to off-line users who pay for the power, and the user at end a does not use the power transmission function of the branch at this time, so the user at end a may not bear the power transmission cost of the line, and needs to adjust the rate of the cost shared by the users at the beginning of the line (i.e., the end from which the power flow flows out of the line). The adjustment scheme can be as follows: when a node k of a user L is the same as a first node i of a line ij, the apportionment cost proportion of the node in the branch is made to be 0, the node deducts the power flow of the node k from the power flow sum of power transmission and then serves as a denominator for calculating the apportionment cost proportion, and accordingly, the apportionment proportion of the power transmission cost is calculated by the following formula:
by using
Figure BDA0001035257320000071
And Cij,kAnd 0(k ═ i), obtaining the sharing proportion of the power transmission fee of each branch of each grid node in the target grid, wherein C isij,kThe power transmission cost sharing proportion of the power grid node k to the branch circuit ij in the target power grid is shown.
That is to say, in the embodiment of the present invention, the apportionment ratio of the first node of the branch is 0, and the apportionment ratios of the other nodes are obtained by calculation according to the above formula.
S205: and obtaining the total power transmission charge of each power grid node in the target power grid based on the apportionment proportion.
The branch power transmission charge shared by each power grid node in the target power grid is determined according to the power flow contribution proportion of the user of the power grid node to the branch, and specifically comprises the following steps:
by using
Figure BDA0001035257320000072
Obtaining the total power transmission charge of each power grid node in a target power grid;
wherein, FijThe transmission charge, F, for branch ij in the target gridkThe total power transmission charge of the grid node k in the target grid is obtained.
S206: and obtaining the power transmission price of each power grid node in the target power grid by using the total power transmission charge and the node electric quantity of each power grid node in the target power grid.
Specifically, T is utilized in the embodiment of the inventionk＝Fk/QkObtaining the transmission price of each grid node, wherein QkIs the node electric quantity of the grid node k in the target grid, TkAnd the transmission price of the grid node k in the target grid is obtained.
According to the scheme, the method for calculating the power transmission price of the extra-high voltage alternating current power grid node provided by the embodiment of the invention calculates the downstream distribution matrix of the power grid, further obtains the power flow contribution value of each node to each branch in the power grid, further obtains the sharing proportion of the power transmission price of each node to each branch, further obtains the total power transmission price of each node in the power grid by using the sharing proportion, and then calculates the power transmission price of each node by using the node electric quantity of each node, thereby achieving the purpose of the embodiment. The method is different from the scheme for setting the one-line and one-price transmission price in the prior art, the sharing is only carried out according to the load of a user or the amount of power consumption, the distance of the transmission distance is not considered, the difference of the sharing proportion is not considered, the level of the transmission price is not different, and the set transmission price is inaccurate.
Fig. 2 is a calculation scheme of power transmission rates of each grid node of a certain grid in the entire extra-high voltage ac grid, while the power transmission rates of each grid node of each grid in fig. 1 can be realized according to the scheme shown in fig. 2, and under special conditions, the sales power rates of each grid are generally required to be made uniformly, so that the average power transmission rates of the grid nodes of the target grid need to be determined uniformly. Fig. 3 shows a calculation scheme of an average power transmission rate of a grid node of the target grid shown in fig. 1, specifically:
s301: and obtaining the sum of the total power transmission fees of all the power grid nodes in the target power grid.
In the embodiment of the present invention, the scheme shown in fig. 2 may be adopted to obtain the sum of the total power transmission fees of the grid nodes in each target grid shown in fig. 1.
S302: and calculating the average power transmission price of the power grid nodes in the target power grid by using the sum of the total power transmission fees of the power grid nodes in the target power grid and the sum of the electric quantity of the nodes.
Specifically, the embodiment of the present invention may obtain the average power transmission rate of each grid node in each target grid in the following manner:
by using
Figure BDA0001035257320000081
Obtaining an average power transmission price of each grid node of the target grid,
Figure BDA0001035257320000082
is the sum of the total power transmission rates of the grid nodes in the target grid,
Figure BDA0001035257320000083
is the sum of node electric quantities of grid nodes in a target grid, wherein T'kAnd A is a set of grid nodes in a target grid of the whole grid accessed to the extra-high voltage alternating current transmission grid.
It should be noted that the average transmission price of each grid shown in fig. 1 can be realized by using the schemes shown in fig. 2 and fig. 3.
For example, for a country, the selling prices in most provincial or state grids are consistent, and the transmission and distribution prices of the provincial or state grids are also uniformly determined, in this case, the provincial or state transmission prices can be calculated by using the schemes shown in fig. 2 and 3 in the embodiment, so as to unify the transmission prices in the provincial or state.
Fig. 4 shows a device for calculating the transmission price of an extra-high voltage ac grid node according to a second embodiment of the present invention, where the device may include the following units to calculate the transmission price of each grid node in the grid shown in fig. 1:
and the power value acquisition unit 401 is configured to acquire a tidal current value of each branch in the target power grid and a total power value of each power grid node.
The power flow value can be understood as the active current value of each branch in the target power grid.
A distribution matrix obtaining unit 402, configured to obtain a downstream distribution matrix of the target power grid based on the tidal current value and the total power value.
In the embodiment of the present invention, the allocation matrix obtaining unit 402 obtains a downstream allocation matrix, which specifically includes:
by using
Figure BDA0001035257320000091
And
Figure BDA0001035257320000092
and obtaining a downstream distribution matrix of the target power grid through calculation.
Wherein L isi-Is an incoming line set, P, of a grid node i in a target gridijThe load flow value of a branch ij in a target power grid is represented, the first node of the branch ij is i, the last node of the branch ij is j, PiIs the total power value, P, of the grid node i in the target gridjIs the total power value, P, of the grid node j in the target gridGiIs the power supply power value of the target power grid node i, i is a positive integer which is more than or equal to 1 and less than n, n is the number of the power grid nodes in the target power grid, [ A ]d]ijAnd distributing a matrix for the downstream of the target power grid branch ij.
And a power flow contribution obtaining unit 403, configured to obtain a power flow contribution value of each branch from each power grid node in the target power grid by using the downstream distribution matrix of the target power grid.
The power flow contribution value of each power grid node in the target power grid to each branch refers to the active power caused by each power grid node in the branch power flow. The flow contribution value is determined based on the forward flow distribution matrix, and the flow contribution obtaining unit 403 obtains the flow contribution value specifically as follows:
by using
Figure BDA0001035257320000093
And obtaining the power flow contribution value of each power grid node to each branch in the target power grid.
Wherein [ A ]d -1]ijTranspose of downstream distribution matrix for target grid branch ij, PkIs the total power value, P, of the grid node kij,kAnd the power flow contribution value of the power grid node k in the target power grid to the branch ij is shown.
And an apportionment proportion obtaining unit 404, configured to obtain, according to the power flow contribution value, an apportionment proportion of the power transmission fee of each branch from each power grid node in the target power grid.
The embodiment of the invention can adopt a downstream tracking method for calculation. It should be noted that the grid node at the beginning of the branch is not using the transmission function of the branch. For example, the power flow on a branch AB flows from node a to node B, and both ends a and B are connected to off-line users who pay for the power, and the user at end a does not use the power transmission function of the branch at this time, so the user at end a may not bear the power transmission cost of the line, and needs to adjust the rate of the cost shared by the users at the beginning of the line (i.e., the end from which the power flow flows out of the line). The adjustment scheme can be as follows: when the node k of the user L is the same as the first node i of the line ij, the apportionment cost ratio of the node in the branch is set to 0, the node deducts the power flow of the node k from the power flow sum of the power transmission and then is used as a denominator for calculating the apportionment cost ratio, and accordingly, the apportionment ratio obtaining unit 404 calculates the apportionment ratio of the power transmission cost by using the following formula:
by using
Figure BDA0001035257320000101
And Cij,kAnd 0(k ═ i), obtaining the sharing proportion of the power transmission fee of each branch of each grid node in the target grid, wherein C isij,kThe power transmission cost sharing proportion of the power grid node k to the branch circuit ij in the target power grid is shown.
That is to say, in the embodiment of the present invention, the apportionment ratio of the first node of the branch is 0, and the apportionment ratios of the other nodes are obtained by calculation according to the above formula.
And an electric power transmission fee obtaining unit 405, configured to obtain a total electric power transmission fee of each grid node in the target grid based on the apportionment ratio.
The branch power transmission charge shared by each power grid node in the target power grid is determined according to the power flow contribution proportion of the user of the power grid node to the branch, and the power transmission charge obtaining unit 405 obtains the total power transmission charge, which is specifically realized by the following method:
by using
Figure BDA0001035257320000102
Obtaining the total power transmission charge of each power grid node in a target power grid;
wherein, FijThe transmission charge, F, for branch ij in the target gridkThe total power transmission charge of the grid node k in the target grid is obtained.
A target power transmission rate obtaining unit 406, configured to obtain a power transmission rate of each power grid node in the target power grid by using the total power transmission rate and the node electric quantity of each power grid node in the target power grid.
The target power transmission rate obtaining unit 406 may utilize Tk＝Fk/QkObtaining the transmission price of each power grid nodeWherein Q iskIs the node electric quantity of the grid node k in the target grid, TkAnd the transmission price of the grid node k in the target grid is obtained.
According to the scheme, the extra-high voltage alternating current power grid node power transmission price calculating device provided by the second embodiment of the invention calculates the downstream distribution matrix of the power grid, further obtains the power flow contribution value of each node to each branch in the power grid, further obtains the sharing proportion of the power transmission charge of each node to each branch, further obtains the total power transmission charge of each node in the power grid by using the sharing proportion, and then calculates the power transmission price of each node by using the node electric quantity of each node, thereby achieving the purpose of the embodiment. The method is different from the scheme for setting the one-line and one-price transmission price in the prior art, the sharing is only carried out according to the load of a user or the amount of power consumption, the distance of the transmission distance is not considered, the difference of the sharing proportion is not considered, the level of the transmission price is not different, and the set transmission price is inaccurate.
Fig. 5 shows a transmission price calculation device for performing unified verification of transmission prices on each grid node of a certain target grid in the entire extra-high voltage ac grid shown in fig. 1, and the device may further include:
the average power transmission price calculating unit 407 is configured to obtain a total power transmission fee of each power grid node in the target power grid, and calculate an average power transmission price of the power grid node in the target power grid by using the total power transmission fee of the power grid node in the target power grid and a total node electric quantity.
Specifically, when calculating the average power transmission rate of each grid node of the target grid in the extra-high voltage alternating current grid, the average power transmission rate calculation unit 407 may be implemented in the following manner:
by using
Figure BDA0001035257320000111
Obtaining an average output of a grid node of a target gridThe price of electricity is set according to the price of electricity,
Figure BDA0001035257320000112
is the sum of the total power transmission rates of the grid nodes in the target grid,
Figure BDA0001035257320000113
is the sum of node electric quantities of grid nodes in a target grid, wherein T'kAnd A is a set of grid nodes in a target grid of the whole grid accessed to the extra-high voltage alternating current transmission grid.
Whereas the average transmission price per grid in fig. 1 can be obtained with the arrangement in fig. 5.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and can include the processes of the embodiments of the methods described above when the computer program is executed. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The functions described in the method of the present embodiment, if implemented in the form of software functional units and sold or used as independent products, may be stored in a storage medium readable by a computing device. With this understanding, portions of the technical solutions or portions of the technical solutions that contribute to the prior art according to the embodiments of the present invention may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computing device (which may be a personal computer, a server, a mobile computing device, or a network device or processor) to execute all or part of the steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A method for calculating the transmission price of an extra-high voltage alternating current grid node is characterized by comprising the following steps:
collecting the tidal current value of each branch in a target power grid and the total power value of each power grid node;
obtaining a downstream distribution matrix of the target power grid based on the tidal current value and the total power value;
obtaining a power flow contribution value of each power grid node to each branch in the target power grid by using the downstream distribution matrix of the target power grid;
obtaining the sharing proportion of the power transmission fee of each branch of each power grid node in the target power grid according to the power flow contribution value, wherein the sharing proportion comprises the following steps: by using
Figure FDA0002414032310000011
And Cij,kAnd 0(k ═ i), obtaining the sharing proportion of the power transmission fee of each branch of each grid node in the target grid, wherein C isij,kThe apportionment ratio of the power transmission charge of the grid node k to the branch ij in the target grid, Pij,kIs the power flow contribution value, P, of the power grid node k in the target power grid to the branch ijijIs the current value of branch ij in the target power grid, [ A ]d -1]ijTranspose of downstream distribution matrix for target grid branch ij, PkIs the total power value, P, of the grid node kiFor the total power value, n, of grid node i in the target gridLThe number of nodes which are users L;
obtaining the total power transmission charge of each power grid node in the target power grid based on the apportionment proportion;
and acquiring the power transmission price of each power grid node in the target power grid by using the total power transmission charge and the node electric quantity of each power grid node in the target power grid.
2. The method of claim 1, further comprising:
obtaining the sum of the total power transmission charge of the power grid nodes in the target power grid;
and calculating the average power transmission price of the power grid nodes in the target power grid by using the sum of the total power transmission fees of the power grid nodes in the target power grid and the sum of the electric quantity of the nodes.
3. The method of claim 1, wherein obtaining a forward flow distribution matrix for the target grid based on the tidal current value and the total power value comprises:
by using
Figure FDA0002414032310000012
Obtaining a downstream distribution matrix of the target power grid;
wherein L isi-Is an incoming line set, P, of a grid node i in the target gridijThe load flow value of a branch ij in the target power grid is represented by i as a first node of the branch ij, j as a last node of the branch ij, and PiIs the total power value, P, of the grid node i in the target gridjIs the total power value, P, of the grid node j in the target gridGiIs the power supply power value of the target power grid node i, i is a positive integer which is more than or equal to 1 and less than or equal to n, n is the number of the power grid nodes in the target power grid, [ A ]d]ijAnd distributing a matrix for the downstream of the target power grid branch ij.
4. The method according to claim 3, wherein obtaining the power flow contribution value of each branch from each grid node in the target grid by using the forward flow distribution matrix of the target grid comprises:
by using
Figure FDA0002414032310000021
And obtaining the power flow contribution value of each power grid node to each branch in the target power grid.
5. The method of claim 1, wherein obtaining the total power transmission charge for each grid node in the target grid based on the apportionment ratio comprises:
by using
Figure FDA0002414032310000022
Obtaining the total power transmission charge of each power grid node in the target power grid;
wherein, FijThe transmission charge, F, of branch ij in the target power gridkAnd the total power transmission charge of the grid node k in the target grid is obtained.
6. The utility model provides a calculating device of extra-high voltage alternating current electric network node power transmission price which characterized in that includes:
the power value acquisition unit is used for acquiring the tidal current value of each branch in the target power grid and the total power value of each power grid node;
the distribution matrix obtaining unit is used for obtaining a downstream distribution matrix of the target power grid based on the tidal current value and the total power value;
the power flow contribution obtaining unit is used for obtaining power flow contribution values of each branch circuit of each power grid node in the target power grid by using the downstream distribution matrix of the target power grid;
the apportionment proportion obtaining unit is used for obtaining the apportionment proportion of the power transmission fee of each branch from each power grid node in the target power grid according to the power flow contribution value, and comprises the following steps: by using
Figure FDA0002414032310000023
And Cij,kAnd 0(k ═ i), obtaining the sharing proportion of the power transmission fee of each branch of each grid node in the target grid, wherein C isij,kThe apportionment ratio of the power transmission charge of the grid node k to the branch ij in the target grid, Pij,kIs the power flow contribution value, P, of the power grid node k in the target power grid to the branch ijijIs the current value of branch ij in the target power grid, [ A ]d -1]ijTranspose of downstream distribution matrix for target grid branch ij, PkIs the total power value, P, of the grid node kiFor the total power value, n, of grid node i in the target gridLThe number of nodes which are users L;
the power transmission charge obtaining unit is used for obtaining the total power transmission charge of each power grid node in the target power grid based on the apportionment proportion;
and the target power transmission price obtaining unit is used for obtaining the power transmission price of each power grid node in the target power grid by using the total power transmission cost and the node electric quantity of each power grid node in the target power grid.
7. The apparatus of claim 6, further comprising:
and the average power transmission price calculating unit is used for obtaining the total sum of the total power transmission charges of the power grid nodes in the target power grid, and calculating the average power transmission price of the power grid nodes in the target power grid by using the total sum of the total power transmission charges of the power grid nodes in the target power grid and the total sum of the node electric quantity.
8. The apparatus according to claim 6, wherein the allocation matrix obtaining unit is specifically configured to: by using
Figure FDA0002414032310000031
And
Figure FDA0002414032310000032
obtaining a downstream distribution matrix of the target power grid;
wherein L isi-Is an incoming line set, P, of a grid node i in the target gridijThe load flow value of a branch ij in the target power grid is represented by i as a first node of the branch ij, j as a last node of the branch ij, and PiIs the total power value, P, of the grid node i in the target gridjIs the total power value, P, of the grid node j in the target gridGiIs the power supply power value of the target power grid node i, i is a positive integer which is more than or equal to 1 and less than or equal to n, n is the number of the power grid nodes in the target power grid, [ A ]d]ijAnd distributing a matrix for the downstream of the target power grid branch ij.
9. The apparatus according to claim 8, wherein the power flow contribution obtaining unit is specifically configured to: by using
Figure FDA0002414032310000033
And obtaining the power flow contribution value of each power grid node to each branch in the target power grid.
10. The apparatus according to claim 6, wherein the power transmission fee obtaining unit is specifically configured to: by using
Figure FDA0002414032310000034
Obtaining the total power transmission charge of each power grid node in the target power grid;
wherein, FijThe transmission charge, F, of branch ij in the target power gridkAnd the total power transmission charge of the grid node k in the target grid is obtained.
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