CN114722971A - Low-voltage transformer area phase identification method - Google Patents
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Abstract
The invention discloses a phase identification method for a low-voltage transformer area, which comprises the following steps: s1, collecting address information and historical voltage sequence data of all users in the area to be identified; s2, judging the phase to which the user belongs based on the address information and/or the historical voltage sequence of the user, comprising the following steps: phase A, phase B and phase C; s3, judging the meter boxes to which the users in the A phase, the B phase and the C phase belong; s4, comparing the meter box and the phase of each user with the records of the zone files, if the meter box and the phase are consistent with the records of the zone files, marking the record information of the user in the zone files as credible, otherwise, marking the record information of the user in the zone files as untrustworthy. The method improves the phase recognition rate based on the voltage sequence and the address information, fully utilizes the existing information to help the identification, can accurately identify the problem of the phase affiliation of the user in the low-voltage distribution network area, reduces the burden of operation and maintenance personnel in the low-voltage distribution network area, and improves the overall working efficiency.
Description
Technical Field
The invention belongs to the technical field of electric power, and particularly relates to a phase identification method for a low-voltage transformer area.
Background
The low-voltage distribution network topology model defines the phase connection relation between each user and a distribution transformer in the transformer area. An accurate topological model of the power distribution network is the key for ensuring the safe and stable operation of the power distribution system. The accurate low-voltage distribution network topology model is the basis of the applications of line loss analysis, three-phase balance, electricity stealing analysis and the like in the transformer area, and the reliability of power supply of the transformer area is improved. When the conditions of maintenance, faults and the like of the transformer area require regional power failure, all users in the power failure region can be informed in advance according to the topological model of the transformer area, so that the users can prepare before the power failure, and the power consumption experience of the users is improved. The user of old district exists private stay wire, lead to the circuit change, perhaps newly-increased user's line information can not in time be at the update of platform district archives, the problem that platform district archives and actual line information are not completely unanimous can appear, when the power failure of corresponding region, this part of user can't be informed to the precision, consequently need distribution network platform district fortune dimension personnel regularly to check the information that platform district archives recorded, it is more up to realize having platform district archives, the artifical problem that has work efficiency low that checks platform district archives information.
Disclosure of Invention
The invention provides a phase identification method for a low-voltage transformer area, aiming at solving the problems.
The invention is realized in such a way that the phase identification method of the low-voltage transformer area specifically comprises the following steps:
s1, collecting address information and historical voltage sequence data of all users in the area to be identified;
s2, judging the phase to which the user belongs based on the address information and/or the historical voltage sequence of the user, comprising the following steps: phase A, phase B and phase C;
s3, judging the meter boxes to which the users in the A phase, the B phase and the C phase belong;
s4, comparing the meter box and the phase of each user with the records of the zone files, if the meter box and the phase are consistent with the records of the zone files, marking the record information of the user in the zone files as credible, otherwise, marking the record information of the user in the zone files as untrustworthy.
Further, the method for determining the phase to which the user belongs based on the historical voltage sequence specifically comprises the following steps:
and calculating a Pearson voltage correlation coefficient r between every two users, dividing the used users into three types based on a judgment threshold value beta of the correlation coefficient, wherein the Pearson voltage correlation coefficient r between two similar users is larger than the judgment threshold value beta of the correlation coefficient.
Further, the method for determining the phase to which the user belongs based on the address information specifically includes:
the method comprises the steps of coding buildings, units and house numbers to which users belong by adopting standard lengths, sequentially forming numerical sequences according to the buildings, the units and the house numbers, dividing the users into three types based on a clustering algorithm, and judging the phases to which the three types of users belong based on the voltage change trend of each type of users.
Further, the method for determining the phase to which the user belongs based on the address information and the historical voltage sequence is specifically as follows:
determining the phase to which the user belongs based on the address information and the historical voltage sequence respectively;
and when the output results of the two methods are consistent, determining that the judgment result is accurate, and if the output results of the two methods are inconsistent, marking the user, wherein the marked user does not participate in the subsequent process.
Further, the step S3 specifically includes the following steps:
clustering users for the first time based on the historical voltage sequence, and distributing the users to each distribution branch box;
and performing secondary clustering based on the user address information, and distributing the users to line boxes under each distribution branch box.
Further, the method for determining the meter box to which the user belongs in the phase A, the phase B and the phase C is specifically as follows
Based on clustering method, users in A phase are divided into M respectivelydIndividual cluster, kd≥Md≥MDWherein M isDFor the number, k, of distribution boxes in the area to be identifieddThe number of the meter boxes in the area to be identified is the number of the meter boxes in the area to be identified;
counting the number of users belonging to each unit in each cluster, traversing each unit in sequence, identifying the cluster where the most users are located as the cluster where the corresponding unit is located, defining the total line box number of all the units in each cluster as the cluster number in the next clustering, clustering each cluster for the second time, acquiring sub-clusters in each cluster, identifying the users in the same sub-cluster as the users belonging to the same meter box, classifying the users based on the meter box where each user address in the sub-cluster is located, counting the number of users under each meter box, and attributing the sub-cluster to the meter box with the most users.
The invention improves the phase recognition rate based on the voltage sequence and the address information, fully utilizes the existing information to help the identification, can automatically identify the user phase and the meter box attribution problem of the low-voltage distribution network, reduces the burden of operation and maintenance personnel of the low-voltage distribution network, improves the overall working efficiency,
drawings
Fig. 1 is a flowchart of a phase identification method for a low-voltage transformer area according to an embodiment of the present invention;
fig. 2 is a schematic diagram of user classification based on the pearson voltage correlation coefficient r according to the embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be given in order to provide those skilled in the art with a more complete, accurate and thorough understanding of the inventive concept and technical solutions of the present invention.
Fig. 1 is a flowchart of a low-voltage distribution area phase identification method according to an embodiment of the present invention, where the method specifically includes the following steps:
s1, collecting address information and historical voltage sequence data of all users in the area to be identified;
the transformer area in the invention refers to a power supply area of a transformer, and generally, one transformer supplies power to one cell. In the embodiment of the invention, the voltage value of a user at a certain moment is missing or abnormal, the missing value is supplemented by an interpolation method, and the abnormal value is deleted;
because the address information has the problem of non-uniform format, the key data is extracted and inserted into the standard template to form the address information in the standard format, and the key data herein includes: cell name, building number (building), and unit number (room).
S2, judging the phase to which the user belongs based on the address information and/or the historical voltage sequence of the user, comprising the following steps: phase A, phase B and phase C;
the voltage sequence is a voltage value sequence under a time sequence, the reaction voltage changes along with the time, time points in historical voltage sequences of different users need to be the same time, the time points in the voltage sequences of the different users are different due to different acquisition frequencies of different acquisition devices, and at the moment, the voltage value sequence of each user under the same time sequence is obtained through an interpolation method.
In the embodiment of the present invention, the method for determining the phase to which the user belongs based on the historical voltage sequence is specifically as follows:
calculating a pearson voltage correlation coefficient r between every two users, dividing the used users into three categories based on a determination threshold value beta of the correlation coefficient, wherein the pearson voltage correlation coefficient r between two users of the same category is larger than the determination threshold value beta of the correlation coefficient, as shown in fig. 2, the determination threshold value beta of the correlation coefficient is 0.92, dividing users m1 to m10 into three categories, users m2 to m5 into one category, users m6 to m8 into one category, and users m9, m10 and m1 into one category; and then, the phase positions of the three types of users are judged based on the voltage change trend of each type of users.
In the embodiment of the invention, all the phase determination methods based on the voltage variation trend of each type of users are as follows:
drawing a voltage time-varying curve (voltage-time curve) of three types of users and a voltage time-varying curve (voltage-time curve) of three-phase UVW (ABC) under a transformer, randomly intercepting an image curve in a time period, comparing the curves of the three types of users with the curves of the three phases of the transformer, if one phase (assumed as a U/A phase) of the curves of the one type of users and the curves of the transformer in the time period has the same power utilization characteristics, namely a certain group of curves on the curves and the curves of the certain phase of the transformer have the same trend (rise, fall, peak value, concave-convex shape and the like), and the other two types of curves do not have the same trend, judging the same phase (such as the phase A), otherwise, re-selecting the time period for searching, and judging methods of the other two phases are the same.
In the embodiment of the present invention, the method for determining the phase to which the user belongs based on the address information specifically includes:
the method comprises the steps of coding the buildings, the units and the house numbers of users by adopting standard lengths, sequentially forming numerical sequences according to the buildings, the units and the house numbers, dividing the users into three types based on a clustering algorithm (k-means clustering algorithm), and judging the phases of the three types of users based on the voltage change trend of each type of users.
In the embodiment of the present invention, the method for determining the phase to which the user belongs based on the address information and the historical voltage sequence specifically includes:
the phase of the user is judged based on the address information and the historical voltage sequence, and the phase judgment method of the user based on the address information and the phase judgment method of the user based on the historical voltage sequence are as described above;
and when the output results of the two methods are consistent, the user is directly output, and if the output results of the two methods are inconsistent, the user is marked, so that the marked user does not participate in the subsequent process and needs to be checked manually.
S3, judging the meter boxes to which the users in the A phase, the B phase and the C phase belong;
in the embodiment of the invention, one or more distribution branch boxes exist in a platform area to be identified, a plurality of meter boxes exist under each distribution branch box, at least one meter box exists in one unit, a plurality of users of A phase, B phase and C phase exist under each meter box, firstly, the users are clustered for the first time based on a historical voltage sequence, the users are distributed to each distribution branch box, and then, the users are clustered for the second time based on user address information on the basis of the first clustering, and are distributed to the line boxes under each distribution branch box, wherein the judging method is as follows:
based on clustering method, users in A phase are divided into M respectivelydIndividual cluster, kd≥Md≥MDWherein M isDFor the number, k, of distribution boxes in the area to be identifieddThe number of the meter boxes in the area to be identified is the number of the meter boxes in the area to be identified;
the method comprises the steps of counting the number of users belonging to each unit in each cluster, enabling the same units of different buildings to belong to different units, traversing each unit in sequence, identifying the cluster where the most users belong as the cluster where the corresponding unit belongs, defining the total line box number of all the units in each cluster as the cluster number in the next clustering, clustering each cluster for the second time, obtaining sub-clusters in each cluster, identifying the users in the same sub-cluster as the users belonging to the same meter box, classifying the users based on the meter box where the address of each user in each sub-cluster is located, counting the number of users under each meter box, and enabling the sub-clusters to belong to the meter box with the largest number of users.
Assuming that a large number of 4-unit users and 5-unit users exist in the cluster 1, and a small number of 6-unit users exist in the cluster 2, a large number of 6-unit users and 7-unit users exist in the cluster 2, wherein 2 line boxes exist in the 4 units, and only one line box exists in each of the 5 units, the 6 units and the 7 units, the cluster number of the next cluster of the cluster 1 is 1 × 2+1 — 3, that is, the cluster 1 is divided into 3 sub-clusters, and the cluster number of the next cluster of the cluster 2 is 2, that is, the cluster 2 is divided into 2 sub-clusters.
In the embodiment of the present invention, the method for determining the meter box to which the user belongs in phase B and phase C is the same as the method for determining the meter box to which the user belongs in phase a, and details are not repeated here.
S4, comparing the meter box and the phase of each user with the records of the zone files, if the meter box and the phase are consistent with the records of the zone files, marking the record information of the user in the zone files as credible, otherwise, marking the record information of the user in the zone files as untrustworthy. To facilitate the output display, trusted users are marked with green and untrusted users with red.
The transformer, distribution junction box, meter box and phase of the user are recorded in the zone file.
The invention has been described by way of example, and it is to be understood that its specific implementation is not limited to the details of construction and arrangement shown, but is within the scope of the invention.
Claims (6)
1. A low-voltage transformer area phase identification method is characterized by comprising the following steps:
s1, collecting address information and historical voltage sequence data of all users in the area to be identified;
s2, judging the phase to which the user belongs based on the address information and/or the historical voltage sequence of the user, comprising the following steps: phase A, phase B and phase C;
s3, judging the meter boxes to which the users in the A phase, the B phase and the C phase belong;
s4, comparing the meter box and the phase of each user with the records of the zone files, if the meter box and the phase are consistent with the records of the zone files, marking the record information of the user in the zone files as credible, otherwise, marking the record information of the user in the zone files as untrustworthy.
2. The method for identifying the phase of the low-voltage transformer area according to claim 1, wherein the method for determining the phase of the user based on the historical voltage sequence is as follows:
and calculating a Pearson voltage correlation coefficient r between every two users, dividing the used users into three types based on a judgment threshold value beta of the correlation coefficient, wherein the Pearson voltage correlation coefficient r between two similar users is larger than the judgment threshold value beta of the correlation coefficient.
3. The method for identifying phases of a low-voltage distribution area according to claim 1, wherein the method for determining the phase of the subscriber based on the address information is specifically as follows:
the method comprises the steps of coding buildings, units and house numbers to which users belong by adopting standard lengths, sequentially forming numerical sequences according to the buildings, the units and the house numbers, dividing the users into three types based on a clustering algorithm, and judging the phases to which the three types of users belong based on the voltage change trend of each type of users.
4. The method for identifying the phase of the low-voltage transformer area according to claim 1, wherein the method for determining the phase of the user based on the address information and the historical voltage sequence comprises the following steps:
determining the phase to which the user belongs based on the address information and the historical voltage sequence respectively;
and when the output results of the two methods are consistent, determining that the judgment result is accurate, and if the output results of the two methods are inconsistent, marking the user, wherein the marked user does not participate in the subsequent process.
5. The low-voltage transformer area phase identification method as claimed in claim 1, wherein the step S3 specifically comprises the following steps: :
clustering users for the first time based on the historical voltage sequence, and distributing the users to each distribution branch box;
and performing secondary clustering based on the user address information, and distributing the users to line boxes under each distribution branch box.
6. The phase identification method for low-voltage transformer area according to claim 5, wherein the meter boxes belonging to the users in the A phase, the B phase and the C phase are determined by the following method
Based on clustering method, users in A phase are divided into M respectivelydIndividual cluster, kd≥Md≥MDWherein M isDFor the number, k, of distribution boxes in the area to be identifieddThe number of the meter boxes in the area to be identified is the number of the meter boxes in the area to be identified;
counting the number of users belonging to each unit in each cluster, traversing each unit in sequence, identifying the cluster where the most users are located as the cluster where the corresponding unit is located, defining the total line box number of all the units in each cluster as the cluster number in the next clustering, clustering each cluster for the second time, acquiring sub-clusters in each cluster, identifying the users in the same sub-cluster as the users belonging to the same meter box, classifying the users based on the meter box where each user address in the sub-cluster is located, counting the number of users under each meter box, and attributing the sub-cluster to the meter box with the most users.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115508662A (en) * | 2022-11-23 | 2022-12-23 | 青岛鼎信通讯股份有限公司 | Method for judging affiliation relationship between district ammeter and meter box |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115508662A (en) * | 2022-11-23 | 2022-12-23 | 青岛鼎信通讯股份有限公司 | Method for judging affiliation relationship between district ammeter and meter box |
| CN115508662B (en) * | 2022-11-23 | 2023-03-07 | 青岛鼎信通讯股份有限公司 | Method for judging affiliation relationship between district ammeter and meter box |
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