CN112865078A - Method for identifying corresponding relation between medium-voltage user access point and medium-voltage special transformer user - Google Patents
Method for identifying corresponding relation between medium-voltage user access point and medium-voltage special transformer user Download PDFInfo
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- CN112865078A CN112865078A CN202110047359.4A CN202110047359A CN112865078A CN 112865078 A CN112865078 A CN 112865078A CN 202110047359 A CN202110047359 A CN 202110047359A CN 112865078 A CN112865078 A CN 112865078A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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Abstract
The invention provides a method for identifying a corresponding relation between a medium-voltage user access point and a medium-voltage special transformer user based on voltage correlation. The problem of lack of the corresponding relation between the medium-voltage user access point and the medium-voltage special transformer user is solved, the corresponding relation between the medium-voltage special transformer user and the medium-voltage user access point is identified by utilizing the voltage data, the topology data and the account data and combining a correlation calculation method, a precondition is provided for accurate calculation of theoretical line loss of a distribution network, line loss management and loss reduction work are further assisted, and the line loss lean management level is improved.
Description
Technical Field
The invention relates to a method for identifying a corresponding relation between a medium-voltage user access point and a medium-voltage special transformer user based on voltage correlation, and belongs to the technical field of power system management.
Background
The line loss rate is a comprehensive technical index of the power grid, and the economic operation state of the power grid can be effectively measured. The technical line loss value obtained by the line loss theoretical calculation is a scientific basis for analyzing and guiding the line loss of the power grid.
The theoretical line loss calculation of the distribution network is to combine the ledger, the topology and the operation data to obtain a theoretical line loss value through load flow calculation, and the accuracy of the ledger, the topology and the operation data directly influences the theoretical line loss calculation result. In the practical application process, the hanging positions of the access points of the public transformer and the medium voltage user can be obtained through topological data, the corresponding relation between the public transformer and the medium voltage user and the feeder line can be obtained through a standing book, but because the medium voltage user is managed by a marketing department, and the medium voltage user access point is managed by a running inspection, the problems of incomplete and inaccurate data maintenance can occur in the process of cross-department data maintenance, namely the process that the medium voltage user is hung on the access point of the medium voltage user, so that the accurate calculation of the theoretical line loss rate is influenced, further, the formulation of loss reduction auxiliary decision can be influenced, and the fine management level of line loss is reduced.
Disclosure of Invention
The invention provides a method for identifying the corresponding relation between a medium-voltage user access point and a medium-voltage special transformer user based on voltage correlation, which aims at the situation that only the line-variable relation between the medium-voltage special transformer user and a feeder line, the distribution situation of the medium-voltage user access point on the feeder line and the corresponding relation between the medium-voltage special transformer user and the medium-voltage user access point are known, and assists in accurate calculation of line loss and fine management of line loss to achieve the purposes of quality improvement and efficiency improvement.
The technical solution of the invention is as follows:
1) determining a medium-voltage special transformer user to be identified;
2) acquiring the medium-voltage special transformer user to be identified and each public transformer voltage data;
3) calculating voltage correlation coefficients of the medium-voltage special transformer user to be identified and each common transformer under the feeder line;
4) sequencing the voltage correlation coefficients of the medium-voltage special transformer users to be identified and the public transformers calculated in the step 3), and determining the most relevant public transformers of the medium-voltage special transformer users to be identified;
5) determining the corresponding relation between the medium-voltage special transformer user and the medium-voltage user access point, and positioning the medium-voltage user access point hung by the medium-voltage special transformer user to be identified;
6) and repeating the steps, and identifying the corresponding relation between other medium-voltage special transformer users and medium-voltage user access points.
The medium-voltage special transformer user voltage grades comprise 6kV, 10kV and 20 kV.
The invention has the beneficial effects that: through the topological data, the account data, the medium-voltage special transformer users and the public transformer voltage acquisition data, the correlation calculation method is used for identifying the corresponding relation between the medium-voltage special transformer users and the medium-voltage user access points, preconditions are provided for the accurate calculation of the theoretical line loss of the distribution network, the line loss management and the loss reduction work are further assisted, and the line loss lean management level is improved.
Detailed Description
The technical solution of the present invention is further explained below.
A method for identifying the corresponding relation between a medium-voltage user access point and a medium-voltage special transformer user based on voltage correlation specifically comprises the following steps:
1) determining a medium-voltage special transformer user to be identified;
2) acquiring the medium-voltage special transformer user to be identified and each public transformer voltage data;
3) calculating voltage correlation coefficients of the medium-voltage special transformer user to be identified and each common transformer under the feeder line;
4) sequencing the voltage correlation coefficients of the medium-voltage special transformer users to be identified and the public transformers calculated in the step 3), and determining the most relevant public transformers of the medium-voltage special transformer users to be identified;
5) determining the corresponding relation between the medium-voltage special transformer user and the medium-voltage user access point;
6) and repeating the steps, and identifying the corresponding relation between other medium-voltage special transformer users and medium-voltage user access points.
Preferably, in step 2), the method for acquiring voltage data includes: acquiring positions of medium-voltage user access points and public transformers hung on feeder lines through distribution network feeder line topological data; the corresponding relation between medium-voltage special transformer users, medium-voltage special transformer users and the feeder line is obtained through the account data of the feeder line, the public transformer users and the medium-voltage special transformer users, and the medium-voltage special transformer users and the medium-voltage special transformer voltage data are obtained through data acquisition of equipment.
As a preferred scheme, the step 3) of calculating the voltage correlation coefficient between the medium voltage specific variable user to be identified and each common variable under the feeder line comprises the following specific steps:
s1: recording the voltage data of the medium-voltage special variable user to be identified at different moments as X ═ X (X)1，X2，…，Xn) I public variables T under the feeder lineiWill be commonly changed into TiThe voltage data at different moments are marked as Yi＝(Yi，1，Yi，2，…，Yi，n)；
S2: voltage correlation coefficient between medium voltage special transformer user to be identified and each common transformer under the feeder line, namely X and YiIs recorded as riAnd the voltage correlation coefficient of the medium-voltage specific transformer user to be identified and the common transformer i is represented, and the calculation formula of the correlation coefficient is as follows:
wherein n is the number of voltage data,
is the average number of X's,
is the average number of Y.
As a preferred scheme, the most relevant common variables are determined through sorting in the step 4), and the specific mode is that voltage correlation coefficients of different common variables and medium voltage special variable users to be identified are sorted in size to obtain a maximum correlation coefficient rjAnd the common variable j is the most relevant common variable of the medium voltage special variable user to be identified. r isjShould satisfy rj≥0.7。
Determining the corresponding relation between the medium-voltage special transformer user and the medium-voltage user access point in the step 5), wherein the method comprises two modes:
the first method is as follows: marking m medium-voltage user access points on a feeder line as JmRespectively calculating the distance from the most relevant common variable to each medium-voltage user access point through topology and line ledger data, and recording as sm，smThe smallest access point is the access point closest to the most relevant common variation, and the positioning of the topological data is realized;
the second method comprises the following steps: marking m medium-voltage user access points on a feeder line as JmRespectively calculating equivalent impedance of the most relevant common variable to each medium-voltage user access point through topology and line ledger data, and recording as Rm，RmThe smallest one is the access point closest to the most relevant common variation, and the positioning of the topological data is realized.
The first mode is suitable for the condition that the equipment parameters in the ledger data are incomplete, such as the length and the unknown model of each line segment on the topological path are only known; the second mode is suitable for the condition that the equipment parameters in the standing book data are complete, and can prepare to calculate each equivalent impedance.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A method for identifying the corresponding relation between a medium-voltage user access point and a medium-voltage special transformer user based on voltage correlation is characterized by comprising the following steps:
1) determining a medium-voltage special transformer user to be identified;
2) acquiring the medium-voltage special transformer user to be identified and each public transformer voltage data;
3) calculating voltage correlation coefficients of the medium-voltage special transformer user to be identified and each common transformer under the feeder line;
4) sequencing the voltage correlation coefficients of the medium-voltage special transformer users to be identified and the public transformers calculated in the step 3), and determining the most relevant public transformers of the medium-voltage special transformer users to be identified;
5) determining the corresponding relation between the medium-voltage special transformer user and the medium-voltage user access point, and positioning the medium-voltage user access point hung by the medium-voltage special transformer user to be identified;
6) and repeating the steps, and identifying the corresponding relation between other medium-voltage special transformer users and medium-voltage user access points.
2. The method for identifying the correspondence between the medium-voltage user access point and the medium-voltage dedicated transformer user based on the voltage correlation as claimed in claim 1, wherein in the step 2), the method for acquiring the voltage data is as follows: acquiring positions of medium-voltage user access points and public transformers hung on feeder lines through distribution network feeder line topological data; the corresponding relation between medium-voltage special transformer users, medium-voltage special transformer users and the feeder line is obtained through the account data of the feeder line, the public transformer users and the medium-voltage special transformer users, and the medium-voltage special transformer users and the medium-voltage special transformer voltage data are obtained through data acquisition of equipment.
3. The method according to claim 1, wherein the step 3) of calculating the voltage correlation coefficient between the medium voltage dedicated variable subscriber to be identified and each common variable under the feeder line comprises:
s1: recording the voltage data of the medium-voltage special variable user to be identified at different moments as X ═ X (X)1，X2，…，Xn) I public transformers under the feeder line and T public transformersiThe voltage data at different moments are marked as Yi＝(Yi，1，Yi，2，…，Yi，n)；
S2: voltage correlation coefficient between medium voltage special transformer user to be identified and each common transformer under the feeder line, namely X and YiIs recorded as riAnd the voltage correlation coefficient of the medium-voltage specific transformer user to be identified and the common transformer i is represented, and the calculation formula of the correlation coefficient is as follows:
wherein,
is the average number of X's,
is the average number of Y.
4. The method according to claim 1, wherein the most relevant common variables are determined in step 4) by ranking, specifically by ranking the voltage relevance coefficients of different common variables and medium voltage dedicated variable users to be identified to obtain the maximum relevance coefficient rjAnd the common variable j is the most relevant common variable of the medium voltage special variable user to be identified.
5. The method according to claim 4, wherein the maximum correlation coefficient r is a maximum correlation coefficientjSatisfy rj≥0.7。
6. The method as claimed in claim 1, wherein the step 5) of determining the correspondence between the medium voltage-specific subscriber access points and the medium voltage-specific subscriber access points is performed by marking m medium voltage subscriber access points on the feeder line as JmRespectively calculating the distance from the most relevant common variable to each medium-voltage user access point through topology and line ledger data, and recording as sm，smThe smallest one is the access point closest to the most relevant common variation, and the positioning of the topological data is realized.
7. The method as claimed in claim 1, wherein the step 5) of determining the correspondence between the medium voltage-specific subscriber access points and the medium voltage-specific subscriber access points is performed by marking m medium voltage subscriber access points on the feeder line as JmRespectively calculating equivalent impedance of the most relevant common variable to each medium-voltage user access point through topology and line ledger data, and recording as Rm，RmZhongji (Chinese character of 'Zhongji')The small access point is the access point closest to the most relevant common variation, and the topological data positioning is realized.
8. The method according to claim 1, wherein the medium voltage user access point and the medium voltage dedicated transformer user corresponding relationship are identified based on voltage correlation, and the medium voltage dedicated transformer user voltage class includes 6kV, 10kV, and 20 kV.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113541141A (en) * | 2021-09-13 | 2021-10-22 | 江苏智臻能源科技有限公司 | Medium-voltage distribution network operation topology identification method based on hierarchical processing |
| CN114022060A (en) * | 2022-01-06 | 2022-02-08 | 国网北京市电力公司 | Distribution network theoretical line loss treatment method, system, equipment and medium |
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