CN116233965A - Ammeter positioning method based on ammeter clustering mechanism - Google Patents
Ammeter positioning method based on ammeter clustering mechanism Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
- H04W40/32—Connectivity information management, e.g. connectivity discovery or connectivity update for defining a routing cluster membership
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
An ammeter positioning method based on an ammeter clustering mechanism comprises the following steps: the master station automatically clusters command messages to the power generation meter under the CCO; the CCO receives and forwards the ammeter automatic clustering command message to all broadband carrier communication modules in the sub-network; the broadband carrier communication module reports a first command response message to the CCO; after receiving the first command response message, the CCO establishes a whole network topology information matrix of the platform area; the CCO clusters the electric meters based on the phase information reported by the whole network topology information matrix and each broadband carrier communication module when the broadband carrier communication module is connected to the network; after the clustering is finished, the CCO sends a second command response message to the master station, and reports the equipment numbers of N ammeter in the master station area and the clustering results of the ammeter; after receiving the second command response message, the master station stores the clustering result of the ammeter to finish positioning the ammeter in the station area. The ammeter positioning method does not need new hardware investment, and can improve the overall management efficiency of the ammeter.
Description
Technical Field
The invention belongs to the technical field of data management of ammeter areas, and particularly relates to an ammeter positioning method based on an ammeter clustering mechanism.
Background
The basic management unit of the power distribution network is a transformer area, which refers to the power supply range of a distribution transformer, and specifically comprises the transformer area and all users under the transformer area. In a transformer area of a low-voltage power distribution network, a power transmission line is generally made of three phases and four wires, wherein three lines respectively represent A, B, C three phases, and the other line is a neutral line N. At present, in urban residential communities where users are relatively concentrated or rural areas where population is relatively dispersed, in order to save installation space of equipment and provide physical protection for electric meters, electric meters in a local power supply area are often installed in a multi-epitope ammeter box in a concentrated manner, and fig. 1 is a topological structure diagram of an access ammeter box in a platform area. A plurality of ammeter is installed in a multi-epitope meter box, and after the ammeter is installed, field installation personnel can record meter box information corresponding to the ammeter and input the meter box information into a power grid management system so as to facilitate later inspection and maintenance.
The electric meter is used as equipment in the power grid, which is responsible for important functions such as monitoring of key power grid operation parameters, metering of electricity consumption of users and the like, and daily management of the electric meter is very important. Each electric meter is assigned a unique equipment number of the whole network after entering the power grid system, and the equipment number of each electric meter is usually represented by a set of decimal numbers with the length of 16, so that the equipment numbers of the electric meters are unified and convenient to manage. At present, the specific installation position management of the electric meters generally realizes indirect positioning of the electric meters by recording the information of the meter box where each electric meter is located. The on-site recording of the electricity meter equipment number information and the installation meter box information and the input of the power grid management system require manual operation. Because the data are lengthy and the items are numerous, the information content is often interspersed with numbers, chinese and English letters, so that a large amount of ammeter installation position information in the power grid management system is difficult to avoid having some wrong content, which can lead staff to be unable to find the corresponding target ammeter on site smoothly by means of the related information. At this time, manual on-site investigation is needed to find a specific installation position of the target ammeter, which can cost high labor cost and time cost, especially in some old communities with irregular wiring, the search range is large, the process is tedious, time and labor are consumed, and the efficiency is low. And the specific residence address of the ammeter user needs to be called in the manual ammeter searching process, and then searching is carried out in the area nearby the address. The correlation process involves the use of relatively sensitive personal information of the user.
In order to solve the above problems, the accuracy of ammeter positioning is improved, and novel ammeter boxes with electronic functions appear in the market, for example, the ammeter boxes are provided with positioning equipment based on Beidou or GPS positioning technology or NFC electronic tags, positioning is realized through the equipment, and labor cost of manual investigation is reduced. However, the electric meter is often installed indoors, positioning accuracy and practical application effect based on satellite signals are not good, and practical field requirements cannot be met. And the meter boxes need to be additionally provided with other electronic equipment, the equipment cost is obviously higher than that of the traditional meter boxes, and the meter boxes are difficult to popularize and apply.
Disclosure of Invention
The invention aims to provide an ammeter positioning method based on an ammeter clustering mechanism of a broadband carrier communication network, which can improve the overall management efficiency of an ammeter without new hardware investment.
In order to achieve the above object, the present invention adopts the following technical solutions:
an ammeter positioning method based on an ammeter clustering mechanism is used for positioning ammeter in a district electricity consumption information acquisition network, wherein the district electricity consumption information acquisition network comprises a main station and broadband carrier communication sub-networks of a plurality of districts, the broadband carrier communication sub-networks comprise CCOs and ammeter with broadband carrier communication modules, the main station and the CCOs of the broadband carrier communication sub-networks of the districts under the jurisdiction perform information interaction, and the CCOs and the ammeter in the broadband carrier communication sub-networks perform information interaction;
S1, a master station automatically clusters command messages to a power generation table under a CCO of a broadband carrier communication subnet of a station area;
s2, after receiving the automatic ammeter clustering command message, the CCO forwards the automatic ammeter clustering command message to broadband carrier communication modules of all the ammeter in the broadband carrier communication sub-network where the CCO is located;
s3, a broadband carrier communication module receiving the ammeter automatic clustering command message reports a first command response message to the CCO, wherein the first command response message at least comprises the following contents: 1) Network short address of the broadband carrier communication module; 2) The electric meter equipment number of the electric meter where the broadband carrier communication module is located; 3) Direct link information;
s4, after receiving the first command response messages reported by all the broadband carrier communication modules in the sub-network, the CCO obtains the topology information of the whole network of the broadband carrier communication sub-network where the CCO is located, and sequences the CCO and all the broadband carrier communication modules in the broadband carrier communication sub-network where the CCO is located according to the sequence from small to large of short addresses, so as to establish a topology information matrix of the whole network of the station area;
s5, the CCO clusters the electric meter based on the whole network topology information matrix and the phase information reported by each broadband carrier communication module when the broadband carrier communication module is connected to the network;
S6, after the clustering is finished, the CCO sends a second command response message to the master station, and reports N ammeter equipment numbers in the own station area according to an ammeter 1-ammeter N sequencing mode and clustering results of the ammeter;
and S7, after receiving the second command response message reported by the CCO, the master station stores the clustering result of the ammeter to finish positioning the ammeter in the station area.
As described above, in the ammeter positioning method based on the ammeter clustering mechanism, optionally, the through link information refers to, for a certain wideband carrier communication module, the network short addresses of all neighboring nodes having through links with the wideband carrier communication module, and the average value of the received signal-to-noise ratios of the last Q messages sent by the wideband carrier communication module received by the wideband carrier communication module itself.
As described above, the electric meter clustering mechanism-based electric meter positioning method, optionally, the full network topology information matrix is:
wherein h is i,j Representing the j-th wideband carrier communication module received by the i-th wideband carrier communication module in the wideband carrier communication sub-networkThe average value of the received signal-to-noise ratios of Q latest messages sent by the block is 1-i, j-N, and N are the number of broadband carrier communication modules contained in one broadband carrier communication sub-network.
In the above-mentioned ammeter positioning method based on ammeter clustering mechanism, optionally, in step S5, the ammeter clustering step is as follows:
s5-1, establishing an N multiplied by N symmetrical matrix D,
element D in the symmetric matrix D i,j For indicating whether two meters are in the same cluster, d i,j ＝d j,i ，d i,j ∈[0,1]A value of 1 indicates that two meters are in the same cluster, and a value of 0 indicates that two meters are not in the same cluster;
initial assignment is performed on elements in the symmetric matrix D: the first element in the first row vector and the first column vector in the symmetric matrix D has a value of 1, and the values of the other elements are all 0;
s5-2, dividing the rest N-1 ammeter except CCO according to the phase, and dividing the N-1 ammeter into A-phase ammeter sets phi respectively A Phase B ammeter set phi B And C-phase ammeter set phi C Then respectively clustering the electric meters in the three sets, wherein the A-phase electric meter set phi A The step of clustering the in-phase ammeter in the ammeter comprises the following steps of collecting the B-phase ammeter set phi B And C-phase ammeter set phi C Step of clustering of in-phase electric meters and a-phase electric meter set phi A The same steps of the in-phase ammeter clustering of the ammeter in the (a):
s5-2a, for the A-phase ammeter set phi A N of (a) A The electric meter only finds an A-phase electric meter set phi based on the whole network topology information matrix H A The method comprises the steps that the ammeter combinations with the bidirectional straight-through links exist among the middle ammeter, the quality of the communication link among each ammeter combination is calculated respectively, and then the ammeter combination list with the A phase of the bidirectional straight-through link is obtained by sequencing the quality of the communication link from big to small;
s5-2b, clustering ammeter combinations in an ammeter combination list with an A phase of a bidirectional direct link according to the types of links among the ammeter, wherein the types of the links among the ammeter are two: the same-box in-phase ammeter link and the different-box in-phase ammeter link;
establishing a cluster for two electric meters in an electric meter combination belonging to the same-box same-phase electric meter link to obtain a plurality of clusters, and combining the two clusters to form a new cluster to replace the original two old clusters if the two clusters contain the same electric meter; if a certain ammeter belongs to the heterogeneous in-phase ammeter links, the ammeter singly establishes a cluster;
s5-2c, carrying out in-phase cluster combination; modifying the values of the elements at the positions corresponding to the symmetric matrix D based on the clustering result in the step S5-2b, and changing the values of the elements at the positions corresponding to the symmetric matrix D from 0 to 1 according to the numbers of the two electric meters if the two electric meters are clustered in the same cluster;
S5-3, combining heterogeneous clusters; after the clustering and merging of the in-phase ammeter are completed, a cluster set consisting of clusters formed by the A-phase ammeter, clusters formed by the B-phase ammeter and clusters formed by the C-phase ammeter is obtained
Wherein K is A Representing the number of clusters formed by the phase A electricity meter, K B Representing the number of clusters formed by the B-phase ammeter, K C The step of combining heterogeneous clusters, representing the number of clusters formed by a C-phase meter, is as follows:
s5-3a, calculating any two heterogeneous clusters theta in the cluster set theta respectively i And theta (theta) j Distance value lambda (theta i ,Θ j )：
λ(Θ i ,Θ j )＝max(L(x 1 ,x 2 ) Electricity meter x) 1 ∈Θ i Ammeter x 2 ∈Θ j Wherein max (L (x 1 ,x 2 ) Represents heterogeneous cluster Θ i And theta (theta) j Maximum value in the quality of two-way communication link between any two electric meters in the network, if at least one electric meter can be found in two out-phase clusters respectively, and two-way through links exist between the two electric meters, the two out-phase clusters are classifiedIf the two heterogeneous clusters cannot be found, classifying the two heterogeneous clusters as non-direct heterogeneous clusters;
s5-3b for each cluster Θ in the set of clusters Θ k The following decision mechanism is performed:
the condition P is: let set ψ= { Θ k ,Θ i ,Θ j Three clusters of mutually different phases satisfy the following 2 conditions simultaneously:
p1) a straight-through heterogeneous cluster is arranged between any two clusters in the set ψ;
P2) for any one cluster in the set ψ, its corresponding heterogeneous cluster with the largest distance value also belongs to the set ψ;
s5-3c, after finishing the judgment of each cluster in the cluster set Θ, merging the clusters, if any three clusters are judged to be in the same table box, merging the three clusters to form a new cluster, replacing the original three old clusters, modifying the numerical value of the position element corresponding to the symmetric matrix D based on the clustering result, and if two electric meters are in the same cluster, changing the numerical value of the position element corresponding to the symmetric matrix D from 0 to 1 according to the serial numbers of the two electric meters;
s5-3d, after judging each cluster in the cluster set Θ, if the judgment result is that the number of the clusters to be determined is 0, the clustering of the ammeter is completed, and if the judgment result is that the number of the clusters to be determined is greater than 0, the clusters to be determined are classified into the set
In (I)>
Then clustering->
Each cluster->
The following decision mechanism is performed:
conditions (conditions)
The method comprises the following steps: let set->
The 2 clusters with different phases simultaneously satisfy the following 2 conditions:
S5-3e, completing cluster aggregation
After the judgment of each cluster, merging the clusters, if any 2 clusters are judged to be in the same table box, merging the 2 clusters to form a new cluster, replacing the original 2 old clusters, modifying the numerical value of the position element corresponding to the symmetric matrix D based on the clustering result, and if two electric meters are the same cluster, changing the numerical value of the position element corresponding to the symmetric matrix D from 0 to 1 according to the numbers of the two electric meters;
s5-3f if cluster set
If the number of the clusters of the 'undetermined' is 0, the merging among the heterogeneous clusters is completed, the clustering process of the ammeter is finished, and if the cluster set is +.>
The decision result is that the number of the clusters of the 'undetermined' is larger than 0, no operation is performed on the clusters, and the clustering process of the ammeter is finished.
In the above-mentioned ammeter positioning method based on ammeter clustering mechanism, optionally, in step S5-2b, it is determined which type the ammeter belongs to by the following method:
construction vector θ, θ= [ θ ] 1 ,θ 2 ,…,θ W ]Wherein θ w ＝L w -L w+1 W=1, …, W-1, W being the number of communication links in the meter combination list for phase a where a bi-directional pass-through link exists;
starting from the first element of the vector theta, searching downwards one by one, finding out the element with the first element value larger than 6, and setting the element as lambda of the vector theta 1 An element;
starting from the 11 th element of the vector theta, searching downwards one by one, and finding out that the value of the first element is smaller than theta 10 -10, let the element be the lambda-th of the vector θ 2 Each element, let λ=min (λ 1 ,λ 2 -1) the first λ link of the W communication links of the combined list of electric meters with bi-directional through links is the same binAnd the other links are different-box in-phase ammeter links.
As described above, the method for positioning electric meters based on the electric meter clustering mechanism may be selected such that the quality of the communication link between the electric meter combinations=the sum of the average signal to noise values of the bidirectional links between the two electric meters divided by 2.
In the electric meter positioning method based on the electric meter clustering mechanism, optionally, in step S1, the master station selects an automatic clustering command message of the electric meter under CCO of the broadband carrier communication subnet of the area in the early morning period.
According to the technical scheme, the local centralized installation mode of the electric meters is utilized to form the characteristic of the topological structure taking the meter box as a unit and having obvious cluster characteristics in the broadband carrier communication network, an automatic electric meter clustering mechanism is provided for the radio station using the broadband carrier communication technology, the network master node realizes the clustering of the electric meters by collecting and analyzing the whole network topology information in the broadband carrier network, judges which electric meters are installed in the same meter box with high probability, and reports the clustering result to the power grid management system. When the on-site staff fails to search the meter due to the fact that the information of the meter installation meter box in the power grid management system is wrong, the clustering result can assist the staff to quickly determine the installation position of the meter under the condition that specific information of the meter user is not used. The ammeter positioning method does not need new hardware investment, can effectively solve the problem that information of an ammeter installation meter box in a management system is wrong, and improves the overall management efficiency of the ammeter.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the following description will briefly explain the embodiments or the drawings required for the description of the prior art, it being obvious that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of the topology of an access meter box within a bay;
FIG. 2 is a schematic diagram of line powering for a three-phase four-wire system bay;
FIG. 3 is a schematic diagram of an installation circuit of a single-phase smart meter;
fig. 4 is a schematic diagram of the working phases of nodes in a broadband carrier communication network in a three-phase four-wire system distribution network;
fig. 5 is a schematic of coverage on in-phase and out-of-phase wires of a wideband carrier communication signal;
fig. 6 is a schematic diagram of an information interaction network structure of a power consumption information collection network of a station area;
FIG. 7 is a flow chart of the method of the present invention;
FIG. 8 is a graph of the link relationship between different meters in two meter boxes with closer line distances;
fig. 9 is a schematic diagram of a classification algorithm of an in-phase communication link.
The following describes the embodiments of the present invention in further detail with reference to the drawings.
Detailed Description
In describing embodiments of the present invention in detail, the drawings showing the structure of the device are not to scale locally for ease of illustration, and the schematic illustrations are merely examples, which should not limit the scope of the invention. It should be noted that the drawings are in simplified form and are not to scale precisely, but rather are merely intended to facilitate and clearly illustrate the embodiments of the present invention. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance or implying the number of technical features indicated; the terms "forward," "reverse," "bottom," "upper," "lower," and the like are used for convenience in describing and simplifying the description only, and do not denote or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, or can be communicated inside the two components, or can be connected wirelessly or in a wired way. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 2, in the low-voltage distribution network in china, a power transmission line is formed by three phases four wires in a basic unit of a transformer area, wherein three wires respectively represent A, B, C three phases (live wires), and the other is a neutral wire N (neutral wire). The three-phase power supply is to take the three groups of currents as live wires respectively, connect the live wires to different power loads and connect the live wires to a common zero line. In a three-phase system, the neutral line (zero line) is currentless when the three phases are balanced. According to the number of power supply lines of consumer electric equipment, the electric meter can be divided into a three-phase electric meter powered by three live wires simultaneously and a single-phase electric meter powered by a single live wire. The three-phase ammeter is mainly applied to industrial electricity metering with larger power consumption, has smaller installation quantity, belongs to daily key patrol objects of power grid management departments, and basically does not have error in installation position information. The single-phase ammeter is mainly applied to electricity metering of common resident users, is huge in quantity, and is easy to make mistakes in installation position information. In order to achieve the balance of three-phase power loads of the power supply line, when an installer installs the single-phase electric meter, different electric meters in one meter box are connected to the power supply line lines with different phases in a relatively average mode (as shown in fig. 3).
With the rapid development of technology, the acquisition mode of the metering data of the ammeter rapidly evolves from an early manual meter reading mode to a remote automatic meter reading mode. The carrier communication technology is a communication technology using a power line as a signal transmission channel, and is an important communication technology in a power grid system. Because of the advantages of large bandwidth, high transmission rate, strong anti-interference capability and the like, communication equipment based on the broadband carrier communication technology is widely applied to power consumption information acquisition systems, and related communication equipment such as three-phase/single-phase ammeter, carrier network coordinator (CCO) and the like embedded with broadband carrier communication modules are installed and used in a plurality of power consumption station areas. Based on the natural association between the broadband carrier communication link and the power line, the invention further applies the broadband carrier communication technology to the field of ammeter positioning.
In order to save the hardware cost of the equipment and reduce the complexity of a network communication protocol, all communication modules in an ammeter collection and transcription network (a station area electricity consumption information acquisition network), including a single-phase communication module and a three-phase communication module, work in a single physical communication channel mode, and a signal transceiver of the communication module can only work on one phase line of three phase lines of A/B/C at each time point. That is, as shown in fig. 4, only the carrier network coordinator (CCO) in the network can change the working phase line by switching at any time, and after the installation is completed, other communication modules (electric meters) can only be fixed on the power supply lines of the corresponding electric meters for signal transceiving, and cannot be switched.
When a communication node in a broadband carrier communication network transmits a broadband carrier communication signal, most of the energy of the electromagnetic signal it transmits is transmitted along the power line of the phase in which it is located. The power line is a benign metal conductor, and although the periphery of the power line is wrapped by an insulating layer, the power line can still be regarded as an antenna with certain electromagnetic signal receiving and transmitting capability, so that a small amount of electromagnetic signal energy can be inevitably diffused out of the power line and radiated into the air, and the power line can be further coupled into the power line with out-phase with relatively close space distance under partial application scenes, thereby generating the phenomenon of cross-phase transmission of carrier signals. When the carrier signal is transmitted in a cross-phase mode, the signal energy of the carrier signal is greatly attenuated, so that a large gap exists between communication coverage areas on an in-phase line and an out-phase line of the carrier communication module, as shown in fig. 5.
Based on the centralized installation mode of the electric meter in the multi-meter-position meter box and the physical propagation characteristic of the broadband carrier communication signal on the line, the invention provides a method for positioning the electric meter based on an automatic clustering mechanism of the electric meter aiming at a station area electricity consumption information acquisition network adopting the broadband carrier communication technology, which electric meter is installed in the same meter box can be accurately judged, so that when the position of the electric meter is lost due to the error of the information of the meter installation meter box in the electric meter management system, key auxiliary information is provided for field staff, the quick repositioning of the position lost electric meter is helped, the workload is effectively reduced, and the integral operation and maintenance efficiency of the electric meter is improved.
As shown in fig. 6, currently, the power consumption collection network includes a master station and a plurality of broadband carrier communication subnets (broadband carrier communication subnets of the station 1, the station 2, the station K, and the … …). The master station is a management node of a plurality of areas in a larger area and has management authority for all power grid company devices in the area in charge of the master station. The master station is provided with a power grid management system, and the power grid management system stores the information of the ammeter box based on the record and input of the field staff during ammeter installation. The ammeter box information includes information related to the ammeter and the installed meter box, such as the ammeter equipment number of at least the ammeter and the information of the meter box (installed meter box information). Table 1 shows a record format of information of an ammeter box, wherein the ammeter equipment number is a set of decimal numbers with the length of 16 and is used for identifying the identity of the ammeter, and the installed ammeter box information is text information consisting of characters (Chinese and English letters) and numbers and is used for identifying the identity and the position of the ammeter box.
TABLE 1
| Entry numbering | Ammeter equipment number | Mounting |
|
| 1 | | XXXXXXXXXX | |
| 2 | XXXXXXXXXX | XXXXXXXXXX | |
| 3 | XXXXXXXXXX | XXXXXXXXXX | |
| … | … | … |
The master station performs information interaction with the CCO of the broadband carrier communication subnetwork of each of the under jurisdiction through a remote communication means, which includes, but is not limited to, 3G, 4G, 5G and other communication technologies. The master station is a management node of a plurality of areas and has management authority for all power grid company devices in the area in which the master station is responsible. Each broadband carrier communication sub-network comprises a plurality of electric meters with broadband carrier communication modules besides CCOs. And the CCO of the broadband carrier communication sub-network of each station area and the ammeter in each station area perform information interaction through the broadband carrier communication sub-network. Besides grasping the label information of the area of the broadband carrier communication sub-network where the CCO is located, the existing single-phase intelligent ammeter can accurately judge the phase of the self power supply line through the hardware of the existing single-phase intelligent ammeter, and the broadband carrier communication standard prescribes that the broadband carrier communication module needs to report the phase information to the CCO when the broadband carrier communication module is connected to the network, so that the CCO also grasps the phase information of each network-access ammeter in the sub-network.
Fig. 7 is a flowchart of the method of the present invention, and an ammeter positioning method according to an embodiment of the present invention is described below with reference to fig. 7. As shown in fig. 7, the method of the present embodiment includes the steps of:
S1, a master station automatically clusters command messages to a power generation table under a CCO of a broadband carrier communication subnet of a station area Y;
s2, after the CCO of the broadband carrier communication sub-network of the station area Y receives the ammeter automatic clustering command message, forwarding the ammeter automatic clustering command message to broadband carrier communication modules of all the ammeter in the broadband carrier communication sub-network of the station area Y in a whole network broadcasting mode;
s3, a broadband carrier communication module receiving the ammeter automatic clustering command message reports a first command response message to the CCO, wherein the first command response message comprises the following contents: 1) Network short address of the broadband carrier communication module; 2) The electric meter equipment number of the electric meter where the broadband carrier communication module is located; 3) Direct link information; the direct link information of the invention refers to the average value (unit is dB) of the received signal-to-noise ratio of the last Q messages sent by the opposite side received by the broadband carrier communication module, wherein for a certain broadband carrier communication module, all the network short addresses of neighbor nodes of the direct link exist with the broadband carrier communication module, and the Q can be 10;
in a specific application, the network short address of the broadband carrier communication module may be data with a length of 12 bits, the network short address is a unique identity of the CCO for identifying the broadband carrier communication module (electric meter) in the subnet when the broadband carrier communication module (electric meter) is connected to the network, and the electric meter equipment number may be data (16 decimal numbers) with a length of 64 bits for identifying the unique identity of the electric meter in the national grid system;
S4, after the CCO receives the first command response message reported by all the broadband carrier communication modules in the sub-network, the CCO can acquire detailed whole-network topology information of the broadband carrier communication sub-network, then the CCO and all the broadband carrier communication modules in the broadband carrier communication sub-network where the CCO is positioned are ordered according to the order of the short addresses from small to large, a whole-network topology information matrix H of a station area Y is established, the network short address of the CCO is fixed to be the minimum value of 0, and therefore the order of the CCO in the whole-network topology information matrix H is the first, namely the CCO is the 1 st ammeter;
specifically, the full network topology information matrix
H in the topology information matrix H of the whole network i,j Representing the average value of the received signal-to-noise ratios of Q (such as 10) latest messages sent by a jth broadband carrier communication module (jth ammeter) received by the ith broadband carrier communication module (ith ammeter) in the broadband carrier communication sub-network, wherein i is more than or equal to 1, N is more than or equal to j, N is the number of broadband carrier communication modules contained in one broadband carrier communication sub-network, and CCO is a three-phase ammeter; the numerical value of diagonal line elements in the full-network topology information matrix H defaults to the maximum value of a signal-to-noise ratio estimation mechanism, and if the broadband carrier communication module cannot correctly receive the opposite message, namely, no direct link exists, the numerical value defaults to the minimum value of the signal-to-noise ratio estimation mechanism;
S5, after the CCO completes the whole network topology information collection of the sub-network, the electric meters are clustered based on the whole network topology information matrix H and the phase information reported when each broadband carrier communication module (electric meter) is accessed to the network, so that the position information of the electric meters is obtained, and the position information of the electric meters can be used for knowing which meter box the electric meters are installed in; the clusters in the invention refer to the electric meters in the same meter box, and the clustering refers to classifying the electric meters judged to be in the same meter box;
as shown in fig. 8, the method of the present invention clusters electricity meters based on the following theory:
(1) In the same meter box, strong in-phase direct links exist among all the in-phase meters;
(2) In the same meter box, a weak cross-phase direct-connection link exists between two electric meters with different phases with high probability;
(3) In two meter boxes with a relatively close line distance, a same-phase or weak straight-through link exists between the same-phase meters;
s6, after the clustering is finished, the CCO sends a second command response message to the master station, and reports the N ammeter equipment numbers in the own station area according to the ordering mode of ammeter 1 to ammeter N and the clustering result of each ammeter;
and S7, after receiving a second command response message reported by the CCO, the master station stores the clustering result of the electric meters to the power grid management system, and positioning of the electric meters in the station area is completed. The clustering result of the electric meters includes, in addition to the information of the installation meter box of the electric meters, the information of the installation meter box corresponding to the other electric meters judged to be in the same cluster (meter box) (which electric meters are in the same cluster can be known from the symmetric matrix D).
When a power grid worker needs to find a certain ammeter in the site of the transformer area Y, the power grid management system can be applied for the position information of the target ammeter, and besides feeding back the installation meter box information of the target ammeter to the worker, the power grid management system can further feed back the installation meter box information corresponding to other ammeter judged to be in the same cluster (meter box) with the target ammeter. When the electric network staff performs on-site meter searching according to the information of the installation meter box of the target electric meter fed back by the management system, if the information is in error in the on-site recording or keyboard input process, the on-site meter searching is failed, the information of the installation meter box corresponding to other electric meters in the same cluster (meter box) of the judged and target electric meter can be further referenced and consulted, the correct installation meter box information of the target electric meter can be found, and the repositioning of the electric meter with lost installation position can be realized quickly under the condition that the user information of the electric meter is not used. In general, although the information of the installation meter box of the electric meter stored in the power grid management system is wrong, the proportion of the wrong information items is relatively low, and the probability of all the meter box installation information of all the electric meters in the same meter box is extremely low, so that even if the meter box installation information of the target electric meter is wrong, related errors can be made up by the information recorded by other electric meters in the same meter box, and the working efficiency of on-site meter searching is effectively improved.
Because the broadband carrier communication technology is a communication technology using a power line to perform signal transmission, the broadband carrier communication technology is easily affected by interference noise generated when various power loads work, in a period of time with a lower power consumption load level of a platform region, the number of power consumption loads and power operated in the platform region are lower, and the interference level generated by a power line channel is correspondingly reduced, in step S1, a master station can select a period of time with a lower power consumption load level, such as early morning, and automatically cluster command messages to the power generation meters under the CCO of the broadband carrier communication sub-network of the platform region Y through a remote communication means, so that the communication link quality among the electric meters can be kept more stable.
The clustering process of the electric meters comprises clustering of the in-phase electric meters and clustering of the out-phase electric meters, and specifically, the step of clustering the electric meters in the step S5 is as follows:
s5-1, establishing an N multiplied by N symmetrical matrix D,
element D in the symmetric matrix D i,j For indicating whether two electric meters (meter i and meter j) are in the same cluster (meter box), d i,j ＝d j,i ，d i,j ∈[0,1]A value of 1 indicates that two electric meters are in the same cluster (same meter box), a value of 0 indicates that two electric meters are not in the same cluster, and a diagonal element value in the symmetric matrix D defaults to 1;
Initial assignment is carried out on the elements in the D:
the electric meter (electric meter 1) corresponding to the CCO is a three-phase intelligent meter, is the only node with three-phase communication capability in the broadband carrier communication sub-network, is responsible for metering the total electricity consumption of the whole station area, is required to be installed near the output end of the low-voltage side line of the transformer, cannot be mixed with other user electric meters, is independently installed in a meter box, and is a cluster only comprising one point, and is marked as cluster 0, the first row vector and the first column vector in the symmetrical matrix D have the value of 1, the values of the other elements are all 0,
s5-2, dividing the rest N-1 ammeter except CCO according to the phase, and dividing the N-1 ammeter into A-phase ammeter sets phi respectively A Phase B ammeter set phi B And C-phase ammeter set phi C Then, the electric meters in the three sets are respectively clustered to form an in-phase electric meter, and the A-phase electric meter set phi is formed below A In which the electric meters are clustered to give a B-phase electric meter set phi B And C-phase ammeter set phi C The same in-phase ammeter clustering process:
s5-2a for phase AAmmeter set phi A N of (a) A Only ammeter based on full network topology information matrix 
Find the A-phase ammeter set phi A The method comprises the steps that the ammeter combinations with the bidirectional through links exist among the middle ammeter, the quality of a communication link between each ammeter combination (two ammeter) is calculated respectively, and then the ammeter combinations with the A phase of the bidirectional through links are obtained by sequencing the quality of the communication links from large to small, wherein the list is shown in table 2; alternatively, the sum of the communication link quality of the meter combination = the average signal to noise value of the bi-directional link between two meters divided by 2, such as the communication link quality between meter i and meter j = (h) i,j +h j,i )/2；
Table 2 ammeter combinations of a phase with bi-directional pass-through links in a network
| Link numbering | Phase A ammeter combination | Communication link quality (dB) |
| 1 | (ammeter a) 1 Ammeter a 2 ) | L 1 |
| 2 | (ammeter a) 3 Ammeter a 4 ) | L 2 |
| … | … | … |
S5-2b, clustering ammeter combinations in an ammeter combination list with an A phase of a bidirectional direct link according to the types of links among the ammeter, wherein the types of the links among the ammeter are two: type 1: the same-box same-phase ammeter link; and type 2: different-box in-phase ammeter links;
establishing a cluster for two electric meters in the electric meter combination belonging to the type 1, namely establishing a cluster for two electric meters of the same-box same-phase electric meter link to obtain a plurality of clusters, and merging the obtained clusters, namely merging any two clusters into a new cluster if the two clusters contain the same electric meter, so as to replace the original two old clusters;
If a certain ammeter m, the two-way communication links of the ammeter m and all neighbor ammeter thereof belong to type 2-different-box in-phase ammeter links, the A phase in the meter box where the ammeter m is positioned is provided with only the unique ammeter m, and the ammeter m singly establishes a cluster;
because the communication line distance between two electric meters in the same box and the same phase is very short and is far smaller than the communication line distance between two electric meters in different boxes and the same phase, the quality value of the same-box in-phase communication link is obviously larger than that of the different-box in-phase communication link; meanwhile, the difference between the quality values of two different same-box in-phase communication links is relatively small, and the larger difference possibly occurs between the quality values of two different-box in-phase communication links, so that links among the electric meters in the electric meter combination list are divided into the above 2 link types;
s5-2c, carrying out in-phase cluster combination;
after the clustering of the same-box same-phase ammeter link and the different-box same-phase ammeter link is completed, the same-phase clusters are combined, the numerical values of elements at the corresponding positions of the symmetric matrix D are modified based on the clustering result, if two ammeter are in the same cluster, the numerical values of the elements at the corresponding positions of the symmetric matrix D are changed from 0 to 1 according to the serial numbers of the two ammeter, for example, ammeter a and ammeter b are in the same cluster, according to the serial numbers a and b of the two ammeter, Finding element D in the symmetric matrix D a,b Element d a,b The value of (2) is changed from 0 to 1;
s5-3, combining heterogeneous clusters;
after the clustering of the in-phase ammeter with the A/B/C phases is completed, a cluster theta comprising a cluster formed by the A-phase ammeter, a cluster formed by the B-phase ammeter and a cluster formed by the C-phase ammeter is obtained, wherein the cluster formed by the A-phase ammeter has K A The clusters formed by the B-phase ammeter are K B The clusters formed by the C-phase ammeter are K C The number of the two-dimensional space-saving type,
and then merging the heterogeneous clusters, namely judging whether the two heterogeneous clusters are positioned in the same table box or not, wherein the specific steps are as follows:
s5-3a, calculating any two heterogeneous clusters theta in the cluster set theta respectively i And theta (theta) j Distance value lambda (theta i ,Θ j )：
λ(Θ i ,Θ j )＝max(L(x 1 ,x 2 ) Electricity meter x) 1 ∈Θ i Ammeter x 2 ∈Θ j Wherein max (L (x 1 ,x 2 ) Represents heterogeneous cluster Θ i And theta (theta) j If at least one ammeter can be found in the two outphasing clusters respectively and a bidirectional direct link exists between the two ammeters, the two outphasing clusters are classified as direct outphasing clusters, otherwise, the two outphasing clusters are classified as non-direct outphasing clusters;
s5-3b for each cluster Θ in the set of clusters Θ k The following decision mechanism is performed:
The condition P is: let set ψ= { Θ k ,Θ i ,Θ j Three clusters of mutually different phases satisfy the following 2 conditions simultaneously:
p1) a straight-through heterogeneous cluster is arranged between any two clusters in the set ψ;
p2) for any one cluster in the set ψ, its corresponding heterogeneous cluster with the largest distance value also belongs to the set ψ;
the number of meter boxes in a platform area is numerous, and the electric meter installation number and the phase distribution situation in different meter boxes often have certain difference, and the meter boxes are divided into the following three types based on the electric meter installation situation of the meter boxes: (1) the electric meter is arranged on all three phases; (2) only two phases are provided with ammeter; (3) an ammeter is arranged on one phase;
from the perspective of three-phase power load balancing, if the number of the electric meters installed in one multi-meter box is more than 3, electric network staff can install the electric meters on three phases in a scattered manner according to the requirements of electric meter installation construction guidance when the electric meters are installed, so that the meter box of the type (1) generally occupies a higher proportion for most of the transformer areas, and after the electric meters are clustered, the number K of clusters respectively generated by the three phases A ，K B And K C The values of (2) are relatively close; the cross-phase broadband signal transmission mode has the advantages that the signal energy attenuation amplitude is larger, so that the proportion of the cross-phase through links in the through links is lower, the cross-phase through links are often only arranged between the out-of-phase electric meters with very close space distance, the space distance of the out-of-phase electric meters in the same meter box is obviously very close, the cross-phase through links are easier to occur, and the quality value of the through links between the cross-phase broadband signal transmission mode and the out-of-phase electric meters in the same box is obviously better than that of the through links between the cross-phase broadband signal transmission mode and the out-of-phase electric meters with far space distance; based on the reasons, the invention designs the cluster judgment mechanism; for cluster theta k In other words, if it can find one cluster on each of the other two phases, and these 3 clusters have a through link with each other, and the respective outphasing cluster with the largest distance value still falls into the set ψ= { Θ k ,Θ i ,Θ j In the case of the two, the set can be basically identified in consideration of that the value of the quality of the through link between the same-box out-of-phase meters with a closer spatial distance is better than that of the through link between the different-box out-of-phase meters with a farther spatial distanceTotal ψ= { Θ k ,Θ i ,Θ j The electric meters in the three out-of-phase clusters are all arranged in the same meter box;
s5-3c, after the judgment of each cluster in the cluster set Θ is completed, combining the clusters, namely, if any three clusters are judged to be in the same table box, combining the three clusters to form a new cluster, replacing the original three old clusters, and modifying the numerical value of the position element corresponding to the symmetric matrix D based on the clustering result, namely, if two electric meters are in the same cluster, changing the numerical value of the position element corresponding to the symmetric matrix D from 0 to 1 according to the serial numbers of the two electric meters;
s5-3d, after judging each cluster in the cluster set Θ, if the judgment result is that the number of the clusters to be determined is 0, indicating that the merging work among heterogeneous clusters is completed completely, completing the clustering of the ammeter, and if the judgment result is that the number of the clusters to be determined is greater than 0, classifying the clusters to be determined as the pending into the set 
In (I)>
Then clustering->
Each cluster->
The following decision mechanism is performed:
conditions (conditions)
The method comprises the following steps: let set->
2 clusters with different phasesThe following 2 conditions are satisfied:
S5-3e, completing cluster aggregation
After the judgment of each cluster in the list, cluster combination can be implemented on the clusters, namely, if any 2 clusters are judged to be in the same list box, the 2 clusters are combined to form a new cluster, the original 2 old clusters are replaced, then the numerical value of the position element corresponding to the symmetric matrix D is modified based on the clustering result, namely, if two electric meters are in the same cluster, the numerical value of the position element corresponding to the symmetric matrix D is changed from 0 to 1 according to the serial numbers of the two electric meters;
s5-3f if cluster set
If the number of the clusters of the 'undetermined' is 0, the merging among the heterogeneous clusters is completed, the clustering process of the ammeter is finished, and if the cluster set is +.>
The decision result is that the number of the clusters to be determined is greater than 0, which means that the meter box where the clusters are located may only install the meter of the cluster, and no other meters with 2 phases exist, so that an out-of-phase cluster cannot be found and combined with the out-of-phase cluster, and therefore no operation is performed on the clusters, and the clustering process of the meters is finished.
Cluster-to-cluster
In other words, if at set->
If one out-phase cluster is found, two out-phase clusters with the largest distance value are opposite to each other, the electric meters in the two out-phase clusters can be basically considered to be installed in the same meter box, and only the electric meters with the phases of the two clusters are installed in the meter box, so that no electric meters with one phase remain.
Further, in step S5-2b, it is possible to determine which type the electricity meter belongs to by:
construction vector θ, θ= [ θ ] 1 ,θ 2 ,…,θ W ]Wherein θ w ＝L w -L w+1 W=1, …, W-1, W being the number of communication links in the meter combination list for phase a where a bi-directional pass-through link exists;
starting from the first element of the vector theta, searching downwards one by one, finding out the element with the first element value larger than 6, and setting the element as lambda of the vector theta 1 An element;
then, starting from the 11 th element of the vector theta, searching downwards one by one to find out that the value of the first element is smaller than theta 10 -10, let the element be the lambda-th of the vector θ 2 Each element, let λ=min (λ 1 ,λ 2 -1), the first λ link of the W communication links of the ammeter combination list (table 2) with bi-directional through links is the same-box in-phase ammeter link, and the remaining links are different-box in-phase ammeter links.
Since vector l= [ L ] 1 ,L 2 ,...,L W ]The element values in (a) are decreasing, so the vector θ= [ θ ] 1 ,θ 2 ,...,θ W-1 ]Starting from left to right, if a certain element value is larger than 6 (a large amount of platform area test data shows that the minimum value of the difference value of the quality of the communication links between the two types of links is larger than 6dB in most cases), obvious faults appear, so that the distinction between the same-box in-phase ammeter link and the different-box in-phase ammeter link can be performed. However, in view of the complex condition of the broadband carrier communication link in the actual area, a condition needs to be further applied that the difference between the link ranked 10 and the worst link in the links of the type 1 must be guaranteed to be not more than 10dB in the classification result (the reason for taking the link ranked 10 is to exclude the links in which the former case may have abnormal and large values), so as to guarantee the accuracy, robustness and stability of the identification result.
In order to verify the accuracy of the method, under the support of a pearl sea power grid company, 1 residential life radio station area is selected in the pearl sea city for carrying out scheme performance test, and the total number of 654 ammeter meters and the total number of meter boxes in the area are 62. The equipment number information of the electric meters installed in each meter box is recorded correctly in advance, then testing is started, an experimenter selects an early morning period to test, then the algorithm provided by the invention is executed to cluster the meter boxes, the test is performed for 10 times, the clustering number results and the electric meter number with error clustering results are shown in the following table:
Table 3 number of clusters of electric meter clustering algorithm and number of errors of clustering result of laboratory zone
| 1 |
2 nd time | 3 rd time | Fourth time | 5 th time | Last time (6) | The 7 th time | 8 th time | |
10 th time | |
| Number of clusters | 62 | 62 | 61 pieces | 62 | 62 | 62 | 62 | 62 | 63 | 62 |
| Number of errors in |
1 | 1 | 4 | 2 | 2 | 3 | 1 | 4 | 5 | 2 |
The definition of the error number of the clustering result in the test is as follows: if the two electric meters are not in the same meter box, but are misjudged to be in the same meter box; or the two electric meters are in the same meter box, but are misjudged to be not in the same meter box, the error of the clustering result occurs for 1 time is indicated.
The test result shows that the clustering result of the invention has very high accuracy, the information can complement the ammeter box installation information of the power grid management system, thereby effectively helping power grid staff solve the problem of position loss caused by error of the ammeter box installation information of the target ammeter and improving the working efficiency of ammeter area field management with low cost.
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 (7)
1. An ammeter positioning method based on an ammeter clustering mechanism is characterized in that: the system comprises a power consumption information acquisition network, a broadband carrier communication sub-network and a communication module, wherein the power consumption information acquisition network comprises a main station and broadband carrier communication sub-networks of a plurality of areas, the broadband carrier communication sub-networks comprise CCOs and power consumption meters with broadband carrier communication modules, the main station and the CCOs of the broadband carrier communication sub-networks of the areas under the jurisdiction perform information interaction, and the CCOs and the power consumption meters in the broadband carrier communication sub-networks perform information interaction;
s1, a master station automatically clusters command messages to a power generation table under a CCO of a broadband carrier communication subnet of a station area;
s2, after receiving the automatic ammeter clustering command message, the CCO forwards the automatic ammeter clustering command message to broadband carrier communication modules of all the ammeter in the broadband carrier communication sub-network where the CCO is located;
s3, a broadband carrier communication module receiving the ammeter automatic clustering command message reports a first command response message to the CCO, wherein the first command response message at least comprises the following contents: 1) Network short address of the broadband carrier communication module; 2) The electric meter equipment number of the electric meter where the broadband carrier communication module is located; 3) Direct link information;
S4, after receiving the first command response messages reported by all the broadband carrier communication modules in the sub-network, the CCO obtains the topology information of the whole network of the broadband carrier communication sub-network where the CCO is located, and sequences the CCO and all the broadband carrier communication modules in the broadband carrier communication sub-network where the CCO is located according to the sequence from small to large of short addresses, so as to establish a topology information matrix of the whole network of the station area;
s5, the CCO clusters the electric meter based on the whole network topology information matrix and the phase information reported by each broadband carrier communication module when the broadband carrier communication module is connected to the network;
s6, after the clustering is finished, the CCO sends a second command response message to the master station, and reports N ammeter equipment numbers in the own station area according to an ammeter 1-ammeter N sequencing mode and clustering results of the ammeter;
and S7, after receiving the second command response message reported by the CCO, the master station stores the clustering result of the ammeter to finish positioning the ammeter in the station area.
2. The meter locating method based on a meter clustering mechanism as claimed in claim 1, wherein: the through link information refers to the network short addresses of all neighbor nodes with through links with a certain broadband carrier communication module, and the average value of the received signal-to-noise ratios of the latest Q messages sent by the other party and received by the broadband carrier communication module.
3. The meter locating method based on a meter clustering mechanism as claimed in claim 1, wherein: the full network topology information matrix is:
wherein h is i,j Representing the average value of the received signal-to-noise ratios of Q latest messages sent by the ith broadband carrier communication module in the broadband carrier communication sub-network, wherein i is more than or equal to 1, N is more than or equal to j, and N is the number of the broadband carrier communication modules contained in one broadband carrier communication sub-network.
4. The ammeter positioning method based on the ammeter clustering mechanism as claimed in claim 1, wherein: in the step S5, the steps of the electric meter clustering are as follows:
s5-1, establishing an N multiplied by N symmetrical matrix D,
element D in the symmetric matrix D i,j For indicating whether two meters are in the same cluster, d i,j ＝d j,i ，d i,j ∈[0,1]A value of 1 indicates that two meters are in the same cluster, and a value of 0 indicates that two meters are not in the same cluster;
initial assignment is performed on elements in the symmetric matrix D: the first element in the first row vector and the first column vector in the symmetric matrix D has a value of 1, and the values of the other elements are all 0;
s5-2, dividing the rest N-1 ammeter except CCO according to the phase, and dividing the N-1 ammeter into A-phase ammeter sets phi respectively A Phase B ammeter set phi B And C-phase ammeter set phi C Then respectively to threeThe electric meters in the set are clustered into electric meters with same phase, and the electric meters with same phase A are clustered into phi A Step of clustering in-phase electric meters of medium electric meters and B-phase electric meter set phi B C-phase ammeter set phi C The same step of the same-phase ammeter clustering of the middle ammeter and the A-phase ammeter set phi A The step of the in-phase ammeter clustering of the medium ammeter is as follows:
s5-2a, for the A-phase ammeter set phi A N of (a) A The electric meter only finds an A-phase electric meter set phi based on the whole network topology information matrix H A The method comprises the steps that the ammeter combinations with the bidirectional straight-through links exist among the middle ammeter, the quality of the communication link among each ammeter combination is calculated respectively, and then the ammeter combination list with the A phase of the bidirectional straight-through link is obtained by sequencing the quality of the communication link from big to small;
s5-2b, clustering ammeter combinations in an ammeter combination list with an A phase of a bidirectional direct link according to the types of links among the ammeter, wherein the types of the links among the ammeter are two: the same-box in-phase ammeter link and the different-box in-phase ammeter link;
establishing a cluster for two electric meters in an electric meter combination belonging to the same-box same-phase electric meter link to obtain a plurality of clusters, and combining the two clusters to form a new cluster to replace the original two old clusters if the two clusters contain the same electric meter; if a certain ammeter belongs to the heterogeneous in-phase ammeter links, the ammeter singly establishes a cluster;
S5-2c, carrying out in-phase cluster combination; modifying the values of the elements at the positions corresponding to the symmetric matrix D based on the clustering result in the step S5-2b, and changing the values of the elements at the positions corresponding to the symmetric matrix D from 0 to 1 according to the numbers of the two electric meters if the two electric meters are clustered in the same cluster;
s5-3, combining heterogeneous clusters; after the clustering and merging of the in-phase ammeter are completed, a cluster set consisting of clusters formed by the A-phase ammeter, clusters formed by the B-phase ammeter and clusters formed by the C-phase ammeter is obtained
Wherein K is A Representing A-phase ammeter shapeNumber of clusters formed, K B Representing the number of clusters formed by the B-phase ammeter, K C The step of combining heterogeneous clusters, representing the number of clusters formed by a C-phase meter, is as follows:
s5-3a, calculating any two heterogeneous clusters theta in the cluster set theta respectively i And theta (theta) j Distance value lambda (theta i ,Θ j )：
λ(Θ i ,Θ j )＝max(L(x 1 ,x 2 ) Electricity meter x) 1 ∈Θ i Ammeter x 2 ∈Θ j Wherein max (L (x 1 ,x 2 ) Represents heterogeneous cluster Θ i And theta (theta) j If at least one ammeter can be found in the two outphasing clusters respectively and a bidirectional direct link exists between the two ammeters, the two outphasing clusters are classified as direct outphasing clusters, otherwise, the two outphasing clusters are classified as non-direct outphasing clusters;
S5-3b for each cluster Θ in the set of clusters Θ k The following decision mechanism is performed:
the condition P is: let set ψ= { Θ k ,Θ i ,Θ j Three clusters of mutually different phases satisfy the following 2 conditions simultaneously:
p1) a straight-through heterogeneous cluster is arranged between any two clusters in the set ψ;
p2) for any one cluster in the set ψ, its corresponding heterogeneous cluster with the largest distance value also belongs to the set ψ;
s5-3c, after finishing the judgment of each cluster in the cluster set Θ, merging the clusters, if any three clusters are judged to be in the same table box, merging the three clusters to form a new cluster, replacing the original three old clusters, modifying the numerical value of the position element corresponding to the symmetric matrix D based on the clustering result, and if two electric meters are in the same cluster, changing the numerical value of the position element corresponding to the symmetric matrix D from 0 to 1 according to the serial numbers of the two electric meters;
s5-3d, after judging each cluster in the cluster set Θ, if the judgment result is that the number of the clusters to be determined is 0, the clustering of the ammeter is completed, and if the judgment result is that the number of the clusters to be determined is greater than 0, the clusters to be determined are classified into the set
In (I)>
Then clustering->
Each cluster->
The following decision mechanism is performed:
Conditions (conditions)
The method comprises the following steps: let set->
The 2 clusters with different phases simultaneously satisfy the following 2 conditions:
S5-3e, completing cluster aggregation
After the judgment of each cluster, merging the clusters, if any 2 clusters are judged to be in the same table box, merging the 2 clusters to form a new cluster, replacing the original 2 old clusters, modifying the numerical value of the position element corresponding to the symmetric matrix D based on the clustering result, and if two electric meters are the same cluster, changing the numerical value of the position element corresponding to the symmetric matrix D from 0 to 1 according to the numbers of the two electric meters;
s5-3f if cluster set
If the number of the clusters of the 'undetermined' is 0, the merging among the heterogeneous clusters is completed, the clustering process of the ammeter is finished, and if the cluster set is +.>
The number of clusters for which the decision is' pendingAbove 0, no operation is performed on these clusters, and the clustering process of the electricity meter ends.
5. The ammeter positioning method based on the ammeter clustering mechanism as claimed in claim 4, wherein: in the step S5-2b, it is determined which type the electric meter belongs to by the following method:
Construction vector θ, θ= [ θ ] 1 ,θ 2 ,…,θ W ]Wherein θ w ＝L w -L w+1 W=1, …, W-1, W being the number of communication links in the meter combination list for phase a where a bi-directional pass-through link exists;
starting from the first element of the vector theta, searching downwards one by one, finding out the element with the first element value larger than 6, and setting the element as lambda of the vector theta 1 An element;
starting from the 11 th element of the vector theta, searching downwards one by one, and finding out that the value of the first element is smaller than theta 10 -10, let the element be the lambda-th of the vector θ 2 Each element, let λ=min (λ 1 ,λ 2 -1), the first λ link of the W communication links of the combined list of electric meters with bi-directional through links is the same-box in-phase electric meter link, and the remaining links are different-box in-phase electric meter links.
6. The ammeter positioning method based on the ammeter clustering mechanism as claimed in claim 4, wherein: the quality of the communication link between the meter combination = the sum of the average signal to noise ratio values of the bi-directional link between the two meters divided by 2.
7. The ammeter positioning method based on the ammeter clustering mechanism as claimed in claim 1, wherein: in step S1, the master station selects an automatic clustering command message of a power generation table under the CCO of a broadband carrier communication subnet of a station area in the early morning period.
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| CN116506287A (en) * | 2023-06-27 | 2023-07-28 | 北京智芯微电子科技有限公司 | Identification method, system and equipment for ammeter in same meter box |
| CN116506287B (en) * | 2023-06-27 | 2023-09-12 | 北京智芯微电子科技有限公司 | Identification method, system and equipment for ammeter in same meter box |
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