CN112581306A - Method, device and system for confirming regional network topological relation based on exhaustion - Google Patents

Method, device and system for confirming regional network topological relation based on exhaustion Download PDF

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CN112581306A
CN112581306A CN201910943624.XA CN201910943624A CN112581306A CN 112581306 A CN112581306 A CN 112581306A CN 201910943624 A CN201910943624 A CN 201910943624A CN 112581306 A CN112581306 A CN 112581306A
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王鹏
黄兆鹏
宋宇
张毅
黄健
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Foshan Power Supply Bureau of Guangdong Power Grid Corp
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Abstract

The invention relates to the technical field of topological relations of power utilization networks in a distribution room, and provides a local network topological relation confirmation method, a device and a system based on exhaustion. The method comprises the steps of determining an area where the topological relation attribution error of the power utilization network can potentially occur; acquiring electric energy data corresponding to each electric energy metering device contained in the area; when the topological relation is calibrated, possible topological relation combinations of the electric energy meters are exhausted; according to the electric energy data, calculating total meter electric energy W in the topology relation combination of the electric energy meters exhausted exhaustively0And sum of user sub-tables
Figure DDA0002223594720000011
Determining the corresponding electric energy W of the total meter in the topological relation combination of each electric energy meter0Sum of user sub-meters in topological relation with each electric energy meter
Figure DDA0002223594720000012
Combining the topological relations of the first electric energy meters with the minimum difference; and comparing all the metering device lists of the current distribution area by using the first electric energy meter topological relation combination to obtain a first electric energy metering device list to be verified on the spot. The invention improves the efficiency of the investigation.

Description

Method, device and system for confirming regional network topological relation based on exhaustion
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of topological relations of power utilization networks of transformer areas, in particular to a local area network topological relation confirmation method, a device and a system based on exhaustion.
[ background of the invention ]
The wrong regional power utilization network topological relation and the energy conservation relation between power supply and power utilization are destroyed. The topological relation of the regional power utilization network is disordered, so that a lot of adverse effects are brought to the production and technical management work of the power industry, and the power industry needs technology urgently to comb the topological relation of the regional power utilization network and find out the real topological relation of the regional power utilization network.
In reality, a traditional manual troubleshooting method is generally adopted for solving the topology problem of the power supply range (platform area for short) of the power supply transformer. Specifically, a power supply company uses a large amount of manpower to check the connection relationship of the individual subscriber lines until all the electric energy subscribers on the power transformer are found out to obtain a real topological relationship of the regional power utilization network. Due to the fact that the line is disordered in reality, manual work is not easy to find out clearly.
In recent years, a large amount of research is carried out on a new technology for combing the topological relation of the regional power utilization network by various technical development and research enterprises and teams of Chinese national power grid companies, southern power grid companies and subordinated enterprises thereof, but a practical method excluding manual operation is not obtained yet.
Among them, a research result of a new technology with a great influence is "a user terminal voltage correlation method". The basic principle of this method is that the voltage change curves measured by all the electric energy meters in one station area in the same time period should be the same. In view of the principle, the strength of the correlation between the voltage time-series data of each user electric energy meter to be judged and the voltage time-series data of the transformer total meter is calculated, and the user to be judged belongs to or does not belong to the local area. The defect of the new method is that most electric energy meters do not have the function of transmitting voltage data, and the usability of the new method is greatly limited. This is why this technique cannot be generalized.
In view of the above, overcoming the drawbacks of the prior art is an urgent problem in the art.
[ summary of the invention ]
The technical problem to be solved by the invention is that no method for effectively confirming whether the topological relation of the regional power utilization network is correct exists in the prior art, and the existing confirmation method is that a power supply company uses a large amount of manpower to check the connection relation of user lines one by one until all electric energy users on the power transformer are found out to obtain a real topological relation of the regional power utilization network. Due to the fact that the line is disordered in reality, manual work is not easy to find clearly, and efficiency is low.
The technical problem to be further solved by the present invention is that in the prior art, a manual individual user line inspection mode is adopted, and for the malicious line change situation occurring after the inspection is completed, it is difficult to quickly find the problem point, and at least, the electricity utilization network topology relationship in the problem area needs to be inspected again, which causes great resource waste.
In a first aspect, the present invention provides a method for confirming a topological relation of a local area network based on exhaustion, including:
determining one or more areas where power utilization network topological relation attribution errors can potentially occur;
acquiring electric energy data corresponding to each electric energy metering device contained in the one or more regions;
when the topological relation is calibrated, possible topological relation combinations of the electric energy meters are exhausted;
according to the electric energy data, calculating total meter electric energy W in the topology relation combination of the electric energy meters exhausted exhaustively0And sum of user sub-tables
Figure BDA0002223594700000021
Determining the corresponding electric energy W of the total meter in the topological relation combination of each electric energy meter0Sum of user sub-meters in topological relation with each electric energy meter
Figure BDA0002223594700000022
Combining the topological relations of the first electric energy meters with the minimum difference;
and comparing all the metering device lists of the current distribution area by using the first electric energy meter topological relation combination to obtain a first electric energy metering device list to be verified on the spot.
Preferably, after obtaining the list of the first electric energy metering device to be verified in the field, the method further comprises:
obtaining a verification result which is returned by the field investigation staff and aims at whether the electricity utilization network topological relation attribution of the first electric energy metering device list to be verified in the field is correct or not;
if the number of errors is judged to exceed a preset threshold value corresponding to the topological relation of the metering devices in the first electric energy metering device list in the verification result, taking the electric energy metering device with the correct verified topological relation in the verification result as a fixed object in the topological relation of the electric energy meter, and iterating to the process of solving the sum difference between the total electric energy meter and the sub-electric energy meters; thereby obtaining the electric energy W of the corresponding general meter0Sum of user sub-meters in topological relation with each electric energy meter
Figure BDA0002223594700000031
And combining the topological relations of the second electric energy meters with the minimum difference.
Preferably, the field-investigation worker further verifies whether the topological relation of the electric energy metering devices in the corresponding second electric energy metering device list is wrong according to the second electric energy meter topological relation combination determined by the second electric energy meter topological relation combination; and repeating the iteration process until the verification result proves that the topological relation conclusion of the electric energy metering devices recorded in the electric energy metering device list is correct.
Preferably, the first and second liquid crystal materials are,the corresponding general meter electric energy W0Sum of user sub-meters in topological relation with each electric energy meter
Figure BDA0002223594700000032
The first electric energy meter topological relation combination with the minimum difference specifically includes:
calculating the corresponding total meter electric energy W in each electric energy meter topological relation combination0Sum of user sub-meters in topological relation with each electric energy meter
Figure BDA0002223594700000033
Mean square error between;
the corresponding electric energy meter topological relation combination with the minimum mean square deviation value is the first electric energy meter topological relation combination.
Preferably, when the topological relation is calibrated, before exhaustively enumerating potential combinations of topological relations of the electric energy meters, the method further includes:
according to the power consumption circuit maintenance record at the data management platform side and/or the feedback measurement data abnormal value of the power consumption metering device exceeding the preset threshold value and the original attributive area information of each power consumption metering device, the verification of each power consumption metering device and the attributive area is completed;
and taking the verification result as a known fixed attribute in the exhaustive combination, and performing the operation related to the exhaustive combination on the electric energy metering devices which are not verified.
Preferably, the electric energy data of each electric energy metering device is stored according to a corresponding relationship between the electric energy data and the load current, and when the corresponding electric energy data is used for the calculation, the method further includes:
and for the respective electric energy data of different electric energy metering devices related to the same round of calculation process, extracting the electric energy data of which the respective load currents are at the same or adjacent energy levels as parameter values for calculation.
Preferably, before determining one or more regions where a topological relation attribution error of the power utilization network can potentially occur, the method further comprises:
respectively calculating the relationship between the electric energy data of the electric energy metering device general meter of each district and the electric energy data sum of the electric energy metering device sub-meters in the district, and confirming one or more target areas with power utilization network topology relationship attribution errors;
determining one or more sub-regions where a topology relationship attribution error of the power utilization network potentially occurs, specifically: and determining one or more regions which are potentially subjected to power utilization network topological relation attribution errors with the one or more target regions according to the one or more target regions.
In a second aspect, the present invention provides an exhaustive area network topology relationship confirmation system, including a database server, a power consumption network topology relationship calculation server, and one or more intelligent terminals, specifically:
the database server is used for storing initial affiliation relations of the electric energy metering devices contained in each region and each region, storing electric energy data reported by each electric energy metering device and providing a data access interface for the power utilization network topological relation calculation server;
the electricity utilization network topological relation calculation server is used for executing the following process contents:
determining one or more areas where power utilization network topological relation attribution errors can potentially occur;
acquiring electric energy data corresponding to each electric energy metering device contained in the one or more regions;
when the topological relation is calibrated, possible topological relation combinations of the electric energy meters are exhausted;
according to the electric energy data, calculating total meter electric energy W in the topology relation combination of the electric energy meters exhausted exhaustively0And sum of user sub-tables
Figure BDA0002223594700000041
Determining the corresponding electric energy W of the total meter in the topological relation combination of each electric energy meter0Sum of user sub-meters in topological relation with each electric energy meter
Figure BDA0002223594700000042
Combining the topological relations of the first electric energy meters with the minimum difference;
and comparing all the metering device lists of the current distribution area by using the first electric energy meter topological relation combination to obtain a first electric energy metering device list to be verified on the spot.
Preferably, the system further comprises an operator, in particular:
obtaining a verification result which is returned by the field investigation staff and aims at whether the electricity utilization network topological relation attribution of the first electric energy metering device list to be verified in the field is correct or not;
if the number of errors is judged to exceed a preset threshold value corresponding to the topological relation of the metering devices in the first electric energy metering device list in the verification result, taking the electric energy metering device with the correct verified topological relation in the verification result as a fixed object in the topological relation of the electric energy meter, and iterating to the process of solving the sum difference between the total electric energy meter and the sub-electric energy meters; thereby obtaining the electric energy W of the corresponding general meter0Sum of user sub-meters in topological relation with each electric energy meter
Figure BDA0002223594700000051
And combining the topological relations of the second electric energy meters with the minimum difference.
In a third aspect, the present invention further provides an apparatus for confirming a topology relationship based on an exhaustive area network, where the apparatus includes:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor and programmed to perform the exhaustive based area network topology relationship validation method of the first aspect.
In a fourth aspect, the present invention further provides a non-volatile computer storage medium, where the computer storage medium stores computer-executable instructions, which are executed by one or more processors, for implementing the method for confirming topology relationship based on exhaustive area networks according to the first aspect.
The invention provides one or more regions which are potentially subjected to power utilization network topological relation attribution errors, and one or more electric energy metering devices (actually represented as high probability) in the one or more regions in the power utilization network topological relation attribution error state are determined through electric energy data, so that more effective troubleshooting basis is provided for workers who need to investigate on the spot. The embodiment of the invention has the advantage that the advantage is particularly outstanding for scenes with larger application scale.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic flowchart of a method for confirming a topological relation based on an exhaustive area network according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the distribution effect of the total meters and the sub-meters of the electric energy metering devices in an area according to the embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the distribution effect of the total meters and the sub-meters of the electric energy metering devices in an area according to the embodiment of the present invention;
fig. 4 is a schematic flow chart of a similarity calculation method according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of a similarity calculation method according to an embodiment of the present invention;
fig. 6 is a schematic flowchart of a method for confirming a topology relationship based on an exhaustive area network with field verification feedback according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a system for confirming a topological relation based on an exhaustive area network according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of an electrical energy data storage format according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of another electrical energy data storage format provided by an embodiment of the present invention;
fig. 10 is a schematic structural diagram of an apparatus for confirming a topological relation based on an exhaustive area network according to an embodiment of the present invention.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the embodiments of the present invention, the symbol "/" indicates the meaning of having both functions, and the symbol "a and/or B" indicates that the combination between the preceding and following objects connected by the symbol includes three cases of "a", "B", "a and B".
In the invention, the topological relation of the regional power utilization network refers to the connection and attribution relation between the similar district electric energy meter general meter (which is the lower concept of the electric energy metering device general meter) and the user electric energy meter sub-meter (which is the lower concept of the electric energy metering device sub-meter) respectively; the connection and affiliation relationship between the electric energy meter master meter of the transformer area and the electric energy meter sub-meters of each company in the industrial park can be realized; the connection and affiliation relationship between the main electric energy meter of the transformer area and each sub-electric energy meter of each user and each sub-electric energy meter of the company in the business and residential dual-purpose park can be realized; and the connection and affiliation relationship between the electric energy meter general meters and the electric energy meter sub-meters of each household in each building in the community and the like can be realized. In each subsequent embodiment of the present invention, more scenarios of the total meter of the electric energy meters in the subzone and the sub-meters of the electric energy meters of the users are developed and explained, however, on the basis of the technical description of this scenario, a person skilled in the art can use the corresponding technical means in the similar scenarios of the above examples without creative work, and further description is omitted hereinafter.
Theoretically, in a specific application scenario of a distribution room, the electric energy data satisfy an energy conservation relation that the input electric energy of the distribution room (electric energy meter general meter) is equal to the sum of all user electric energy data (electric energy meter branch meters). The above "conservation of electric energy" can be established only under the correct and real topological relation of the power utilization network of the transformer area. In an actual scene, line loss and errors of the electric energy metering device exist certainly, so that the electric energy conservation relation is a relative relation and is not an absolute strict equivalent relation in a data meaning. A necessary and sufficient condition for the power grid topological relation (the subordinate concept of the regional power grid topological relation described in the present invention) to be correct is: a unique set of electric energy data can be found, and at each time point, the above-mentioned relative station area electric energy conservation relation (which will be referred to as the station area energy conservation relation in the following description of the present invention) can be satisfied.
In reality, there may be data in the electric energy data of the distribution room that does not belong to the distribution room, and the electric energy data that originally belongs to the distribution room may not be seen in the distribution room. In this case, a group of data cannot be found so that the energy conservation relation of the distribution area is established, and the topological relation of the power utilization network of the distribution area cannot be calculated by using the electric energy data of the distribution area. This is also the reason why the power data in the cell is not used in the prior art to calculate the power network topology of the cell.
The method expands the range of the electric energy data to select the electric energy data for calculation, and particularly takes the electric energy data of one or more adjacent areas where the topological relation error of the electric network can potentially occur as the data for calculating the topological relation of the electric network. For example: the electric energy data of other distribution areas which belong to the same power distribution room as the local distribution area, the electric energy data of other distribution areas which belong to the same residential area or village as the local distribution area, the electric energy data of other distribution areas which belong to the same power supply station as the local distribution area, and the like.
The method for selecting the electric energy data can return the electric energy data (which will be abbreviated as "foreign subscriber") not belonging to the local station area to the station area where the electric energy data should be located by cooperating with the calculation of the topological relation of the power utilization network of other station areas, and can restore the electric energy data (which will be abbreviated as "escape subscriber") wrongly counted to other station areas back to the local station area. Therefore, the real power utilization network topological relation of the local area (and the adjacent area) can be obtained.
In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other. The implementation of the present invention will now be described by way of embodiments in a stepwise fashion.
Example 1:
embodiment 1 of the present invention provides a method for confirming a topological relation of a local area network based on exhaustion, where an area described in the embodiment of the present invention belongs to a concept that is broader than a station area, and as long as the area relates to a mapping relation between a total table (short for a total table of an electric energy metering device) and a sub-table (short for a sub-table of an electric energy metering device), the area can be divided into a concept of one area, so that the concept of the area is more biased to solve the technical problem that the embodiment of the present invention relates to a layout scene of the total table and the sub-table in the prior art, and for a problem that record information after layout (record information here refers to a mapping relation between a logical total table and a sub-table recorded on a server side) does not correspond to an actual layout line, for example: the logical relationship between the summary tables and the branch tables recorded by the server side can occur in the adjacent distribution areas, the adjacent distribution rooms, the adjacent cells, a distribution network line provided with a plurality of summary tables and the like, and the logical relationship is inconsistent with the connection mode between the electric meters in the actual scene. The station area belongs to the most typical aspect of the corresponding problems in the prior art, and the complex problems of electricity utilization, charging, errors of an electric energy metering device, electricity stealing, electric leakage and the like in the station area belong to the application scene which needs to be solved most urgently at present, and the most basic requirement is to clearly find out the attribution of the topological relation of the electricity utilization network in the station area, which is also the technical problem which is relatively pertinently solved by the method provided by the embodiment of the invention. As shown in fig. 1, the method of the embodiment of the present invention includes:
in step 201, one or more areas where a topological relation attribution error of the power utilization network can potentially occur are determined.
The determination method here may be simply divided by the information recorded in the database server, for example: the database server records the mapping relationship (described as the topological relationship of the power utilization network in the embodiment of the invention) between the total meters of each district and the sub meters of the electric energy meters of each building of each district. Namely, one or more regions where the topological relation attribution error of the power utilization network potentially occurs can be calibrated according to the zone characteristics of the divided geographic positions.
In addition to the above simple potential area calibration according to the partitioned geographical areas, in the implementation process of the embodiment of the present invention, preferably, a mapping relationship between the electricity meters (including the general tables and/or the sub tables) and each installation device (e.g., the substation box) may be established in combination with a specific installation environment to assist in determining, specifically, a relevant operator may report corresponding setting information of a plurality of general tables set in the same substation box to the database server, and accordingly, the same substation box or a plurality of general tables in the same substation may become one of objects of one or more areas where an attribution error of a topology relationship of the electricity utilization network may potentially occur. Taking fig. 2 as an example, if the two electric energy metering device general tables in the area 1 and the area 2 are arranged in the same transformer box, it may be considered that the area 1 and the area 2 are one or more areas where an attribution error of the topological relation of the electric power utilization network potentially occurs. Specifically, since the electric energy metering device summary table M0 and the electric energy metering device summary table N0 are provided in the same substation, the partial tables in the area may have inconsistency between the actual line connection and the network topology relationship for the database server record shown in fig. 2, for example: the lines of the electric energy metering device sub-meter M1 and the electric energy metering device sub-meter N1 are cross-connected, that is, the line of the electric energy metering device sub-meter M1 is connected to the electric energy metering device main meter N0, and the line of the electric energy metering device sub-meter N1 is connected to the electric energy metering device main meter M0, at this time, the topological relation of the electricity utilization network recorded by the database server is as shown in fig. 2, and the actual line connection relation is as shown in fig. 3.
In the preferred implementation manner, by further combining the relevant information of the installation environment (the mapping relationship between the established electric meter and each installation device), it is more effective and accurate to perform one or more region division which can potentially cause the electricity utilization network topology attribution error, than the above-mentioned one or more region division which is purely based on the data of the total table and the sub-table mapping relationship which are recorded in the database server and divided according to the geographic location. On the other hand, the optimization mode can amplify the analyzed environment in a certain sense, and the effectiveness of finally identifying the topological relation attribution error of the power utilization network through calculation is improved. For example: for the reason of subsequent construction, a summary table is newly added in an existing substation, and if corresponding operations are recorded in a database only by the corresponding relation between the summary table and the sub-tables, possible judgment that the topological relation attribution error of the power utilization network possibly occurs actually is lost. Because the classification is based only on the electricity usage type or the geographical location of the divided segments, actual environmental considerations between the two within the same substation may be missed.
On the other hand, in practical situations, for the mapping relationship between the total table of the power grid and the electric energy meter sub-tables of each building of each cell recorded in the database server, in addition to the possible mapping relationship error between the electric energy meter sub-tables and the total table in each individual building, a position error between the directly registered total tables may also occur, and in this case, the analysis range of one or more regions where the electric network topology attribution error potentially occurs may be widened more effectively through the preferred implementation manner. Still taking fig. 2 as an example, in which the electric energy metering device total meter M0 and the electric energy metering device total meter N0 are provided in the same substation, an error may occur in the position between the electric energy metering device total meter MO and the electric energy metering device N0 recorded in the database. This situation is also considered in the validation process of step 203 subsequent to the embodiment of the present invention.
In step 202, electric energy data corresponding to each electric energy metering device included in the one or more regions is acquired.
In the embodiment of the present invention, the source end obtaining the electric energy data is described as a database server, and the database server is generally expressed as a data management platform of an electric power company in an actual environment, that is, a main body having an electric energy data collecting and storing capability for a total meter of each electric energy metering device and a sub-meter of each electric energy metering device in an area. The implementation manner of the corresponding main body is not limited to a server in a stand-alone form, and may also be a cloud platform, or the management is completed by a third-party database management platform, which is not particularly limited herein.
In the specific calculation method for subsequent development in the embodiment of the present invention, the use of the electric energy data relates to electric energy data in a continuous time sense, electric energy data in different time periods, electric energy data in a special scene, and the like. Even if the usage of some electric energy data is not directly provided by the existing data management platform similar to the electric power company, the corresponding method proposed by the embodiment of the present invention may be required to process the corresponding electric energy data, and how to process the corresponding electric energy data will be specifically described in the following expanded description of the embodiment of the present invention.
In step 203, when the topological relations are calibrated, potential combinations of topological relations of the electric energy meters are exhausted.
If step 201 and step 202 are preparatory actions, then step 203 is entering the actual operational step content. The possible combinations of topology relations of the electric energy meters that are exhausted are obtained by analyzing one or more regions that are determined in the step 201 and where the topology relation attribution error of the electric energy utilization network potentially occurs.
In step 204, according to the electric energy data, a total meter electric energy W in the above-mentioned exhaustive topological relation combination of the electric energy meters is calculated0And sum of user sub-tables
Figure BDA0002223594700000101
It is emphasized that the total meter power W is used herein0And sum of user sub-tables
Figure BDA0002223594700000102
Is suitable forTopological relation combinations of electric energy meters, namely, in each topological relation combination of electric energy meters, the electric energy of the total meter uses the identifier W0Are represented by identifiers and the corresponding user sub-tables are all represented by identifiers
Figure BDA0002223594700000103
Wherein n is the total number of users in the topological relation combination of the electric energy meter, and the corresponding WiIs representative of power data corresponding to the ith user.
In step 205, the corresponding total meter electric energy W in each electric energy meter topological relation combination is determined0Sum of user sub-meters in topological relation with each electric energy meter
Figure BDA0002223594700000111
And combining the topological relations of the first electric energy meters with the minimum difference.
Preferably, in the embodiment of the present invention, the difference distance is calculated by means of a mean square error. Specifically, in each combination of topological relations of electric energy meters, the electric energy W of the corresponding total meter is calculated0Sum of user sub-meters in topological relation with each electric energy meter
Figure BDA0002223594700000112
Mean square error between; the corresponding electric energy meter topological relation combination with the minimum mean square deviation value is the first electric energy meter topological relation combination.
In step 206, the first electric energy meter topological relation combination is used to compare all the metering device lists of the current distribution area, so as to obtain a first electric energy metering device list to be verified in the field.
The embodiment of the invention provides a method for determining one or more regions which are potentially subjected to power utilization network topology relationship attribution errors, and determining one or more electric energy metering devices (including the foreign users and/or the escape users) which are in the power utilization network topology relationship attribution error state in the one or more regions through electric energy data, so that more effective investigation basis is provided for field investigation workers. The embodiment of the invention has the advantage that the advantage is particularly outstanding for scenes with larger application scale.
In one or more calculation modes provided by the embodiment of the present invention, the description of the home error state of the topological relation of the power utilization network of the electric energy metering device is mainly performed through probability, which mainly considers that in practice, an application scenario related to the method provided by the present invention usually includes hundreds or even thousands of electric energy metering devices (a cell is taken as an example, a level of about thousands of households can be reached, and each household is usually provided with an electric energy metering device sub-meter), while for a region and a province and city, the number of the related electric energy metering devices is larger, and a specific calculation environment is more complex, especially some involve long-distance transmission, and the possibility of shunting exists in the transmission process and is shunted under the condition that the electric energy metering devices are registered by a database server in a non-regular manner; in addition, errors in the electric energy metering device itself and line loss on the transmission line complicate the computing environment. Therefore, an environment given to calculation in a real scene is a non-ideal environment, and a corresponding result naturally cannot reach a calculation result with 100% accuracy, so that the embodiment of the invention provides a method for describing the possibility of attribution errors of topological relations of power utilization networks between sub-meters of each electric energy metering device and a main meter of the electric energy metering device by using the difference between the electric energy of the main meter and the total electric energy of the sub-meters. The disparity may be calculated by the utility network topology relation calculation server and seen by a high-level manager, and for a worker who examines in the field, the disparity may be only an assignment task which obtains a requirement to verify the attribution of the utility network topology relation of the one or more electric energy metering devices. That is to say, by the method in the embodiment of the present invention, the manner of displaying the one or more electric energy metering devices in the power utilization network topology attribution error state may be various, and is not particularly limited in the embodiment of the present invention.
In the embodiment of the invention, at least the following three specific modes are provided for calculating the correlation between the electric energy data of the electric energy metering device general table in each area and the electric energy data of one or more electric energy metering devices which establish the attribution of the useful electric network topological relation with each area in the current record.
Mode one, as shown in fig. 4:
in step 301, exhausting the one or more regions, each electric energy metering device can constitute a combination between the total electric energy metering device in each region and the sub-electric energy metering devices included in the corresponding region.
Although described as exhaustive, the actual operation may be more varied and complicated than that described in step 301, for example: for the total regional electric energy metering device list and the sub-regional electric energy metering devices in the corresponding region, which have historically verified the topological relation of the power utilization network, the total regional electric energy metering device list and the sub-regional electric energy metering device list can exist in each combination in a fixed form as known quantities, namely, the verified topological relation of the power utilization network (considered to be correct) is not added into the exhaustive process in the step 301, so that the calculation process in the first mode is simplified.
However, in a strict consideration during a specific operation process, it is preferable that, in the initial several rounds of calculation, the historically verified power utilization network topological relation may be used as a correct known quantity, and if there is still a large similarity deviation after several rounds of demonstration, the historically verified power utilization network topological relation also needs to be added as an object to be verified to the exhaustive object in step 301 in the embodiment of the present invention on the basis of the power metering device of the power utilization network topological relation verified by the method provided in the embodiment of the present invention.
In step 302, the electric energy Z is measured according to the electric energy metering devicei(understood as the total meter power W in the ith power meter topology relation combination0) And the sum F of sub-meter electric energy of electric energy metering devices contained in corresponding areas in corresponding combinationsi(understood as the sum of the user sub-meters in the ith electric energy meter topological relation combination
Figure BDA0002223594700000121
) Calculating ZiAnd FiThe difference between the two and/or the variance of the difference between the two.
Where i indicates the ith combination. And for the electric energy Z of the general meteriFor example, it may use power data for a specified duration as the corresponding ZiThe parameter value can also be selected as the corresponding Z according to the electric energy data in a certain time periodiThe parameter value can also adopt the combination of electric energy data in time intervals as the corresponding ZiThe parameter values. The method is not particularly limited, and the preferred method for selecting the parameter values will be described in detail in the data analysis section of the embodiment of the present invention.
In step 303, the calculated Z for each combination is comparediAnd FiAnd obtaining the first electric energy meter topological relation combination with the minimum difference in the electric network topological relation combinations by the difference value of the two electric energy meters and/or the variance of the difference value of the two electric energy meters.
Wherein, step 302 and step 303 describe a round of ZiAnd FiThe two are compared, and in a specific operation, the number of comparison can be multiple groups, and for the multiple groups of comparison process, the corresponding power data also needs to be configured with multiple groups. The simple conclusion is that, generally, the more times of comparison, the more occupied computing resources of the power utilization topology data computing server, the longer the corresponding computing time, but the accuracy of the corresponding computing result is also improved to some extent, and finally, how to choose or consider the actual computing environment and the actual number of workers in field investigation is to adjust, which is not described herein again.
In step 304, one or more electric energy metering devices with the electric energy consumption network topology relationship attribution error probability exceeding a preset threshold are calibrated according to the actually obtained electric energy consumption network topology relationship attribution relationship and the obtained first electric energy meter topology relationship combination.
In a specific operation process, one or more electric energy metering devices with the attribution error probability of the topology relation of the electricity utilization network which is calibrated to exceed the preset threshold value can directly send the related information of the electric energy metering device to be verified to the intelligent terminal of the worker who examines in the field through the intelligent terminal which is provided for the worker who examines in the field in the subsequent system embodiment of the invention, and the worker who examines in the field finishes the investigation work.
Mode two, as shown in fig. 5:
in step 501, when the user electric energy meter to be determined is removed or added, the Z is calculatediAnd FiThe difference of the two and/or the variance of the two.
The removing of the user electric energy meter to be determined and the adding of the user electric energy meter to be determined actually correspond to the concepts of 'foreign households' and 'escape households' introduced by the invention. Therefore, in the first two-phase comparison method, the original means for solving the correct probability of the power consumption network topological relation of the specific power consumption metering devices through the similarity of various combinations is converted into the means for introducing the concepts of 'foreign households' and 'escape households' into the calculation process, the correct probability of the power consumption network topological relation of each power consumption metering device is calculated on the basis of one initial combination, and the error type of the power consumption network topological relation is also judged.
In step 502, all the user electric energy meters to be determined or the combination thereof are exhaustively calculated, and F is added or withdrawniWhen is brought to ZiAnd FiAnd the difference value of the two and/or the variance of the two changes towards minimization, so that the user electric energy meter to be judged or the combination of the user electric energy meter to be judged belongs to the correct topological relation of the power utilization network.
In comparison, the second method can obtain the calculation result more effectively than the first method, but, relatively speaking, the second method is more suitable for a scenario that after the power consumption network topological relation of a part of the power consumption metering devices has been historically confirmed, the power consumption network topological relation of the rest of the power consumption metering devices needs to be confirmed. Because the number of the effective electric energy metering devices (i.e. electric energy metering devices with correct electric network topological relation) contained in the initial combination is larger at this time, the accuracy of the final calculation result is better guaranteed.
In both the first and second modes, the topology relationship of the power utilization network of the historically verified electric energy metering device is described, and the information can be used as known correct information in the initial calculation processes. Corresponding operations can greatly improve or improve the calculation efficiency, however, some preferable technical means exist based on the exhaustive area network topology relationship confirmation mode provided by the embodiment of the invention, and the exhaustive combination quantity in the first mode and the second mode can be further simplified. The specific description is as follows:
the electricity utilization network topological relation calculation server can complete the verification of each electric energy metering device and the attributive region according to the electricity utilization circuit repair record at the data management platform side and the original attributive region information of each electric energy metering device; and/or the presence of a gas in the gas,
the electricity utilization network topological relation calculation server can complete verification of each electric energy metering device and an attributive region according to the abnormal value of the feedback metering data of the electric energy metering device exceeding a preset threshold value and the original attributive region information of each electric energy metering device;
and taking the verification result as a known fixed attribute in the exhaustive combination, and performing the operation related to the exhaustive combination on the electric energy metering devices which are not verified. Wherein the known fixed attribute is taken as an invariant, is excluded from an exhaustive range as an inherent attribute, and is directly added to the combination as the content included in the combination.
The scheme provides a preferable technical means, which can combine the historical electric circuit maintenance and measurement data abnormity, and uses an elimination method and the like to take each electric energy measurement device which can finish the electric network topology relationship attribution verification in advance as a fixed attribute, and the fixed attribute is excluded from the exhaustion range of the step 301, so that the calculated amount is further reduced, and the calculation efficiency of the method for confirming the regional network topology relationship based on exhaustion provided by the embodiment of the invention is improved.
The power utilization line maintenance can be power utilization maintenance for buildings, power utilization maintenance for cells and power utilization maintenance for regions, and the corresponding power utilization maintenance can bring short power utilization vacuum periods, so that the verification of the power utilization network topological relation of individual regions is possible. For example, because of electricity utilization maintenance, a power failure measure is taken for electricity utilization in a cell, however, actually 1 electric energy metering device of the cell still works, it can be determined through the above analysis that attribution of the electricity utilization network topology relationship between 1 electric energy metering device of the cell and the electric energy metering device general table of the area corresponding to the cell is definitely wrong verification information, and when the verification information is used to be exhaustive in step 301, the possibility of combining 1 electric energy metering device of the cell and the electric energy metering device general table of the area corresponding to the cell can be reduced. The abnormal data may be abnormal power consumption caused by an emergency, such as a block power outage caused by construction, a block power outage caused by a natural disaster, and the like, and the effect of the abnormal data for the embodiment of the present invention is similar to that of the above-mentioned electric line maintenance from the side, but the abnormal data is lower in reliability.
In the embodiment of the invention, for the operation mode of conducting field investigation by the staff committing the field investigation, the investigation result can be fed back to the power utilization network topological relation calculation server to realize a feedback type iterative calculation. Therefore, in connection with the embodiment of the present invention, there is also a preferred embodiment, as shown in fig. 6, the method further includes:
in step 601, a verification result returned by the field work staff is obtained, wherein the verification result is used for whether the power utilization network topological relation attribution of the one or more electric energy metering devices is correct.
The method and the device have the advantages that the probability result is calculated according to the embodiment of the invention, and the probability result is not an absolute result in a strict sense aiming at the power consumption network topological relation attribution error of each power consumption metering device in the power consumption network topological relation. Moreover, the related information of the electric energy metering devices carried in the task of verifying by each field-investigation worker is actually triggered, or the electric energy metering devices are screened according to the preset threshold determined in step 304, so that the corresponding power utilization network topological relation may be attributed to be correct or wrong after the field-investigation worker verifies.
In step 602, iterating the verification result to the electricity consumption network topology relationship attribution calculation process, and obtaining one or more electric energy metering devices of which the updated electricity consumption network topology relationship attribution error probability exceeds a preset threshold.
As will be explained by combining the first and second manners, the verification result involved in step 602 is iterated into the electricity utilization network topology relationship attribution calculation process, specifically, the verification result returned in step 601 is used as a new fixed attribute, and steps 301 to 304 are executed again. As can be seen from the above description, the first and second modes may be used alternatively or in parallel in the embodiment of the present invention, and are not described herein again.
With reference to the embodiment of the present invention, there is also a preferred implementation scheme, wherein before step 201 is executed, the method processes in step 201 to step 206 are usually executed until the difference between the sum of the electric energy of the total meter of the electric energy metering device in a certain area and the sum of the electric energy of the sub-meters of the electric energy metering device exceeds a second preset threshold, otherwise, it is determined that the topological relation of the electric network in the corresponding area is normal, and the method processes in step 201 to step 206 are not required. Therefore, in the preferred implementation, generally before determining one or more areas where a topology affiliation error of the electricity utilization network is potentially likely to occur, the method further comprises:
respectively calculating the relationship between the electric energy data of the electric energy metering device general meter of each district and the electric energy data sum of the electric energy metering device sub-meters in the district, and confirming one or more target areas with power utilization network topology relationship attribution errors;
determining one or more sub-regions where a topology relationship attribution error of the power utilization network potentially occurs, specifically: and determining one or more regions which are potentially subjected to power utilization network topological relation attribution errors with the one or more target regions according to the one or more target regions.
In combination with the embodiment of the present invention, there is also a preferred expanded implementation scheme, where after obtaining a list of first electric energy metering devices to be verified in the field, the method further includes:
obtaining a verification result which is returned by the field investigation staff and aims at whether the electricity utilization network topological relation attribution of the first electric energy metering device list to be verified in the field is correct or not;
if the number of errors is judged to exceed a preset threshold value corresponding to the topological relation of the metering devices in the first electric energy metering device list in the verification result, taking the electric energy metering device with the correct verified topological relation in the verification result as a fixed object in the topological relation of the electric energy meter, and iterating to the process of solving the sum difference between the total electric energy meter and the sub-electric energy meters; thereby obtaining the electric energy W of the corresponding general meter0Sum of user sub-meters in topological relation with each electric energy meter
Figure BDA0002223594700000171
And combining the topological relations of the second electric energy meters with the minimum difference.
In combination with the embodiment of the present invention, there is also a preferred extended implementation scheme, and a worker who examines in the field further verifies whether the topological relation of the electric energy metering devices in the corresponding second electric energy metering device list is wrong according to the second electric energy meter topological relation combination determined by the second electric energy meter topological relation combination to be verified in the field; and repeating the iteration process until the verification result proves that the topological relation conclusion of the electric energy metering devices recorded in the electric energy metering device list is correct.
With reference to the embodiment of the present invention, there is also a preferred implementation scheme, where before exhaustively enumerating potential combinations of topological relations of each electric energy meter when calibrating the topological relations, the method further includes:
according to the power consumption circuit maintenance record at the data management platform side and/or the feedback measurement data abnormal value of the power consumption metering device exceeding the preset threshold value and the original attributive area information of each power consumption metering device, the verification of each power consumption metering device and the attributive area is completed;
and taking the verification result as a known fixed attribute in the exhaustive combination, and performing the operation related to the exhaustive combination on the electric energy metering devices which are not verified.
In combination with the embodiment of the present invention, there is also a preferred extended implementation scheme, where before determining one or more regions where a topology relationship attribution error of a power utilization network potentially occurs, the method further includes:
respectively calculating the relationship between the electric energy data of the electric energy metering device general meter of each district and the electric energy data sum of the electric energy metering device sub-meters in the district, and confirming one or more target areas with power utilization network topology relationship attribution errors;
determining one or more sub-regions where a topology relationship attribution error of the power utilization network potentially occurs, specifically: and determining one or more regions which are potentially subjected to power utilization network topological relation attribution errors with the one or more target regions according to the one or more target regions.
Example 2:
on the basis that the embodiment 1 of the present invention provides a local area network topology relationship confirmation method based on an exhaustion, the embodiment of the present invention further provides a local area network topology relationship confirmation system based on an exhaustion, which can be used to complete the corresponding method described in the embodiment 1, and therefore, the corresponding technical content described in the embodiment of the present invention can also be applied to the implementation of the method in the embodiment 1.
As shown in fig. 7, the system includes a database server, a power consumption network topological relation computing server, and one or more intelligent terminals, and in the embodiment of the present invention, in consideration of the possibility of the scale of the data volume of a specific application scenario, the power consumption network topological relation computing server may be in a form of a single host, or may be in a form of a cloud platform, which is not particularly limited herein. The system specifically comprises:
the database server is used for storing initial affiliation relations of the electric energy metering devices contained in each region and each region, storing electric energy data reported by each electric energy metering device and providing a data access interface for the power utilization network topological relation calculation server;
the electricity utilization network topological relation calculation server is used for executing the following process contents:
determining one or more areas where power utilization network topological relation attribution errors can potentially occur;
acquiring electric energy data corresponding to each electric energy metering device contained in the one or more regions;
when the topological relation is calibrated, possible topological relation combinations of the electric energy meters are exhausted;
according to the electric energy data, calculating total meter electric energy W in the topology relation combination of the electric energy meters exhausted exhaustively0And sum of user sub-tables
Figure BDA0002223594700000181
Determining the corresponding electric energy W of the total meter in the topological relation combination of each electric energy meter0Sum of user sub-meters in topological relation with each electric energy meter
Figure BDA0002223594700000182
Combining the topological relations of the first electric energy meters with the minimum difference;
and comparing all the metering device lists of the current distribution area by using the first electric energy meter topological relation combination to obtain a first electric energy metering device list to be verified on the spot.
In the embodiment of the invention, the intelligent terminal can be a professional detection device and is attached with data interaction capability of a topological relation calculation server of an electric network; or, the intelligent terminal is a general intelligent mobile phone, and the determination of the corresponding topology attribution may be completed by a professional detection device, and a worker who examines in the field transmits the verification result data to the electricity utilization network topology relation calculation server through the intelligent terminal, and the specific implementation form is not limited to the above two, and the derived similar verification mode and feedback mode both belong to the protection scope of the embodiment of the present invention.
The embodiment of the invention provides a method for determining one or more regions which are potentially subjected to power utilization network topological relation attribution errors, and determining the probability of one or more electric energy metering devices in the power utilization network topological relation attribution error state in the one or more regions through electric energy data, so that a more effective troubleshooting basis is provided for workers who need to investigate on the spot. The embodiment of the invention has the advantage that the advantage is particularly outstanding for scenes with larger application scale.
In the embodiment of the invention, the electric energy metering device specifically corresponds to residents in each building under one platform area; or the electric energy metering device specifically corresponds to each household in a village under one transformer area; or the electric energy metering device specifically corresponds to each shop under one platform area; or the electric energy metering device specifically corresponds to each factory building under one platform area.
Because the topological relations of the power utilization networks of the transformer areas are different in chaos degree, the electric energy data of different transformer areas are also greatly different. Different and applicable mathematical models can be constructed for different district electric energy data, different algorithms are selected, and the topological relation of the district power utilization network can be calculated with higher efficiency. And the corresponding model and algorithm are stored in the power utilization network topological relation calculation server in advance. The following will develop 1 typical model in detail:
model 1, summary table and branch table and residual (and residual variance) minimization model (the model 1 corresponds to the first mode in embodiment 1)
Model: min { residual } ═ summary table-sublist sum (1)
min{σResidual error}＝σSummary table-branch table and (2)
physically, the mechanism by which model 1 holds is:
by using the combination of the formula (1), the fixed station area general table and the one-to-one exhaustive list table, the combination of the station area general table and the station area table which can enable the residual error to be the minimum value is calculated, and the combination can form a topological relation of a real power utilization network of the station area, namely a high-probability event.
By using the combination of equation (2) (where the residual is the variance in embodiment 1), the fixed station area total table, and the one-to-one exhaustive distribution table, the combination of the station area total table and the station area distribution table that can make the variance value of the residual be the minimum is calculated, and the combination can form a topological relation of the real power utilization network of the station area, which is a high-probability event.
When the error of the electric energy meter is ignored, if all the branch meters in the "branch meters and" in the equation (1) are the user electric energy meters in the station area, the residual error in the equation (1) is equal to 0, and when the error of the electric energy meter is considered, the residual error is equal to the sum of the errors of the electric energy meters and is a very small electric quantity, so that the branch meter with the minimum residual error is formed, and the event of all the electric energy meters in the station area is just a high-probability event. Even so, the criterion of minimum residual error can only be used as a necessary condition of correct topological relation of the power utilization network of the transformer area, but is not a sufficient condition. On the contrary, when the sub-meters and the middle-station-area external electric energy meter exist, the residual error tends to become larger.
The significance of equation (2) is that, even when the error factor of the electric energy meter is considered, when the sub-sum is just the entire electric energy meters in the station area, theoretically, the variance of the residual error is 0 (the residual error is 0, which is an essential condition for "the topological relation of the power utilization network in the station area is correct"). In practice, the variance of the residual is not 0, but a value very close to 0. When the partial table sum has an algorithm: the exhaustive user sub-tables form the sub-tables, and the sub-tables which satisfy the formulas (1) and (2) and the actual power utilization network topological relation under the general table are satisfied. On the contrary, when the sub-meters and the power meters outside the distribution area exist in the middle, the residual variance value tends to become larger.
In view of the fact that the electric energy meters in the station area and the electric energy meters outside the station area can be distinguished by using the formula (1) and the formula (2), the invention combines the electric energy meters as one of a set of mathematical models for calculating the topological relation of the power network of the station area.
Example 3:
whether the method steps described in embodiment 1 or the model described in embodiment 2 calculate the probability of one or more energy metering devices (including at least the probability of an alien user and the probability of an escape user, and may also include a summary registration error probability, etc.) belonging to an error state, the energy data reported by each energy metering device recorded in the database server needs to be used. However, in the case that we further consider the error of the electric energy metering device itself, and the error of the error corresponding to each electric energy metering device under different load currents is segmented, further optimization processing is further proposed in the embodiment of the present invention as the input parameter for calculating the probability of one or more electric energy metering devices belonging to the error state of the topological relation of the electricity utilization network in the above-mentioned embodiments 1 and 2.
As shown in fig. 8, the data format reported by a typical electric energy metering device stored in the database server is shown, wherein, for different electric energy metering devices, in addition to the voltage-load current pair format (as shown in fig. 8), the electric energy-load current pair format (as shown in fig. 9) may also be adopted, and the two modes are equivalent; however, two ways have common characteristics in the embodiments of the present invention: the load current is recorded. Then, when the parameter value is specifically taken, the electric energy data of different electric energy metering devices related to the same calculation process is considered, and the load current at the same or adjacent energy level is extracted as much as possible, so that the electric energy data of the large-span load current in the calculation process can bring large fluctuation to the error deviation of the same electric energy metering device, and the accuracy of the final calculation result is influenced. As described herein, the operation may be performed according to a percentage reference value, so that the accuracy of the calculation is improved by the above-mentioned screening mechanism of the electric energy data participating in the calculation under the condition that the electric energy data itself is abundant. The embodiment 3 of the invention is particularly suitable for the situation that the calculation server has abundant calculation capacity when the topological relation of the power utilization network is calculated.
Example 4:
fig. 10 is a schematic diagram illustrating an architecture of an apparatus for confirming a topology relationship based on an exhaustive area network according to an embodiment of the present invention. The device for confirming the topological relation of the area network based on the exhaustion of the embodiment includes one or more processors 21 and a memory 22. In fig. 10, one processor 21 is taken as an example.
The processor 21 and the memory 22 may be connected by a bus or other means, and fig. 10 illustrates the connection by a bus as an example.
The memory 22, as a non-volatile computer-readable storage medium, may be used to store a non-volatile software program and a non-volatile computer-executable program, such as the exhaustive area network topology relationship validation method in embodiment 1. Processor 21 executes the exhaustive area network topology relationship based validation method by executing non-volatile software programs and instructions stored in memory 22.
The memory 22 may include high speed random access memory and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, the memory 22 may optionally include memory located remotely from the processor 21, and these remote memories may be connected to the processor 21 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The program instructions/modules are stored in the memory 22, and when executed by the one or more processors 21, perform the exhaustive area network topology relationship confirmation method in embodiment 1, for example, perform the steps shown in fig. 1, fig. 4, fig. 5, and fig. 6 described above.
It should be noted that, for the information interaction, execution process and other contents between the modules and units in the apparatus and system, the specific contents may refer to the description in the embodiment of the method of the present invention because the same concept is used as the embodiment of the processing method of the present invention, and are not described herein again.
Those of ordinary skill in the art will appreciate that all or part of the steps of the various methods of the embodiments may be implemented by associated hardware as instructed by a program, which may be stored on a computer-readable storage medium, which may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.
Example 4:
the embodiment of the present invention further provides an example of an application of the method for confirming a topological relation of a local area network based on an exhaustion provided in embodiment 1 of the present invention and the system for confirming a topological relation of a local area network based on an exhaustion provided in embodiment 2. In the embodiment of the present invention, the topological relation of the regional power utilization network is specifically expressed as a power distribution area topology, and the concept of the power distribution area topology refers to that a power supply and utilization user, which is composed of a power transformer (usually, a total electric energy meter is correspondingly arranged, i.e., one of specific expression forms of a total electric energy meter of an electric energy metering device), and all electric energy users (each of which is provided with a user electric energy meter, i.e., one of specific expression forms of a sub-meter of an electric energy metering device described in embodiment 1 of the present invention) supplied with power by the power transformer, forms a power supply area.
The line connection relationship between the transformer total electric energy meter and the user electric energy meter is called a distribution room network power utilization network topological relationship (a distribution room power utilization network topological relationship for short). Since the power lines in the distribution area are in the wall, in the cable trench, and in addition, other transformers are nearby, a statistical error often occurs when the power consumer is actually connected to which power transformer, which is described as a distribution area power utilization network topology relation error in the embodiment of the present invention. The contents of the examples are as follows:
and (3) calculating topological relations of power utilization networks of 2 transformers of 6# power distribution room and power supply station areas of 6# power distribution room in south 96 # Hongkhongshijia district (hereinafter referred to as "Hongkhong district") in Chan city of Buddha mountain of Guangdong province.
The time of the electric energy data is as follows:
25 days of active power data during the 18 th to 14 th 6 th 7 th 2018.
Calculation process of topological relation of regional power utilization network
First step, selecting data
The Foshan Power supply company returns 25 days of electric energy data from the information center of the Guangdong province Power supply company, and comprises all the electric energy data of 16 districts of the whole Hongkong Hongshi home district.
Second step, selecting mathematical model and algorithm
Three models and algorithms are selected, respectively:
model 1, summary and sub-tables, and residual (and residual variance) minimization model
Model: min { residual }, sum of partial table
min{σResidual error}＝σSummary table-branch table and
the algorithm selects a 'table-dividing and' combined exhaustive test algorithm. The details are shown in corresponding contents in embodiment 1 and embodiment 2, and are not described herein again.
Model 2, model for calculating correlation coefficient between sublist and general table
Figure BDA0002223594700000231
Algorithm selects w0iAnd
Figure BDA0002223594700000232
"multiple correlation coefficient maximization" algorithm, wherein
Figure BDA0002223594700000233
The term is optimized by combining the exhaustive methods. The details are shown in corresponding contents in embodiment 1 and embodiment 2, and are not described herein again.
Model 3, model for calculating derivation relation of correlation coefficients of partial table and general table
Figure BDA0002223594700000234
Algorithm selects w0iAnd
Figure BDA0002223594700000235
algorithm for maximizing Pearson correlation coefficientWherein
Figure BDA0002223594700000236
The term is optimized by combining the exhaustive methods. The details are shown in corresponding contents in embodiment 1 and embodiment 2, and are not described herein again.
Third step, calculating and checking result on site
The following table comprehensively checks the accuracy conclusion of the topological algorithm
Figure BDA0002223594700000237
Note: in the above table, "the verified number of households" is the number of all verified households in the electric room; the 'correct number of users' is the number of users whose topological attribution relations in all users conform to the 'topological relation table of recommended power utilization network' (i.e. the calculation result is verified to be correct); the 'calculation number of users' is the number of users with wrong attribution of the topological relation of the power utilization network, which is the object to be checked by the staff to be examined on the spot, for the current calculation result of the user crossing; the 'extra calculation result' is the number of conventional users in the electric room, namely the calculation probability of the electric network topological relation attribution is regarded as a correct object.
From the calculation and verification results, the accuracy of the calculation results of the cross-family is high, and 2 transformer areas of the 6# electric room reach 100%.
Meanwhile, the situation of 'miscalculation caused by miscalculation of cross-house' also exists, the miscalculation rates of 2 areas are respectively 5.8% and 12.8%, and the results of after-the-fact research show that the miscalculation is mainly caused by different periods of electric energy data acquisition. The power supply company is very satisfied with the calculation result, and the result greatly exceeds the requirement of the assessment index.
And adjusting according to the calculation and the field verification result to obtain the real power utilization network topological relation of the transformer area.
The calculation of the current round can be completed, and the rest of the cross-households can be calculated and checked for resolution in the second round if necessary.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A method for confirming a topological relation based on an exhaustive area network is characterized by comprising the following steps:
determining one or more areas where power utilization network topological relation attribution errors can potentially occur;
acquiring electric energy data corresponding to each electric energy metering device contained in the one or more regions;
when the topological relation is calibrated, possible topological relation combinations of the electric energy meters are exhausted;
according to the electric energy data, calculating total meter electric energy W in the topology relation combination of the electric energy meters exhausted exhaustively0And sum of user sub-tables
Figure FDA0002223594690000011
Determining the corresponding electric energy W of the total meter in the topological relation combination of each electric energy meter0Sum of user sub-meters in topological relation with each electric energy meter
Figure FDA0002223594690000012
Combining the topological relations of the first electric energy meters with the minimum difference;
and comparing all the metering device lists of the current distribution area by using the first electric energy meter topological relation combination to obtain a first electric energy metering device list to be verified on the spot.
2. The method of claim 1, wherein after obtaining a list of first energy metering devices to be verified in the field, the method further comprises:
obtaining a verification result which is returned by the field investigation staff and aims at whether the electricity utilization network topological relation attribution of the first electric energy metering device list to be verified in the field is correct or not;
if the verification result is positive, corresponding to the first powerIf the topological relation judgment error quantity of the metering devices in the list of the energy metering devices exceeds a preset threshold value, taking the energy metering devices with correct topological relation verified in the verification result as fixed objects in the topological relation of the energy meters, and iterating to the process of solving the sum difference between the total energy meter and the sub-energy meters; thereby obtaining the electric energy W of the corresponding general meter0Sum of user sub-meters in topological relation with each electric energy meter
Figure FDA0002223594690000013
And combining the topological relations of the second electric energy meters with the minimum difference.
3. The method for confirming topological relation of area network based on exhaustion according to claim 2, wherein the staff for field investigation verifies whether the topological relation of the electric energy metering devices in the corresponding second electric energy metering device list is wrong or not further according to the second electric energy meter topological relation combination determined to be verified in the field; and repeating the iteration process until the verification result proves that the topological relation conclusion of the electric energy metering devices recorded in the electric energy metering device list is correct.
4. The method for identifying topological relation of local area network based on exhaustion of claim 2, wherein said corresponding total electric energy W0Sum of user sub-meters in topological relation with each electric energy meter
Figure FDA0002223594690000021
The first electric energy meter topological relation combination with the minimum difference specifically includes:
calculating the corresponding total meter electric energy W in each electric energy meter topological relation combination0Sum of user sub-meters in topological relation with each electric energy meter
Figure FDA0002223594690000022
Mean square error between;
the corresponding electric energy meter topological relation combination with the minimum mean square deviation value is the first electric energy meter topological relation combination.
5. The method for identifying topological relation of area network based on exhaustive enumeration as claimed in any one of claims 1 to 4, wherein when calibrating topological relation, before exhaustively enumerating potential combinations of topological relation of electric energy meters, further comprising:
according to the power consumption circuit maintenance record at the data management platform side and/or the feedback measurement data abnormal value of the power consumption metering device exceeding the preset threshold value and the original attributive area information of each power consumption metering device, the verification of each power consumption metering device and the attributive area is completed;
and taking the verification result as a known fixed attribute in the exhaustive combination, and performing the operation related to the exhaustive combination on the electric energy metering devices which are not verified.
6. The method for confirming topological relation of area network based on exhaustive list according to any one of claims 1 to 4, wherein the electric energy data of each electric energy metering device is stored according to corresponding relation between the electric energy data and the load current, and when the corresponding electric energy data is used for the calculation, the method further comprises:
and for the respective electric energy data of different electric energy metering devices related to the same round of calculation process, extracting the electric energy data of which the respective load currents are at the same or adjacent energy levels as parameter values for calculation.
7. The method of claim 1, wherein prior to determining one or more areas where a power utilization network topology relationship attribution error is potentially likely to occur, the method further comprises:
respectively calculating the relationship between the electric energy data of the electric energy metering device general meter of each district and the electric energy data sum of the electric energy metering device sub-meters in the district, and confirming one or more target areas with power utilization network topology relationship attribution errors;
determining one or more sub-regions where a topology relationship attribution error of the power utilization network potentially occurs, specifically: and determining one or more regions which are potentially subjected to power utilization network topological relation attribution errors with the one or more target regions according to the one or more target regions.
8. The system for confirming the topological relation of the area network based on the exhaustion is characterized by comprising a database server, a power utilization network topological relation calculation server and one or more intelligent terminals, and specifically comprises the following steps:
the database server is used for storing initial affiliation relations of the electric energy metering devices contained in each region and each region, storing electric energy data reported by each electric energy metering device and providing a data access interface for the power utilization network topological relation calculation server;
the electricity utilization network topological relation calculation server is used for executing the following process contents:
determining one or more areas where power utilization network topological relation attribution errors can potentially occur;
acquiring electric energy data corresponding to each electric energy metering device contained in the one or more regions;
when the topological relation is calibrated, possible topological relation combinations of the electric energy meters are exhausted;
according to the electric energy data, calculating total meter electric energy W in the topology relation combination of the electric energy meters exhausted exhaustively0And sum of user sub-tables
Figure FDA0002223594690000031
Determining the corresponding electric energy W of the total meter in the topological relation combination of each electric energy meter0Sum of user sub-meters in topological relation with each electric energy meter
Figure FDA0002223594690000032
Combining the topological relations of the first electric energy meters with the minimum difference;
and comparing all the metering device lists of the current distribution area by using the first electric energy meter topological relation combination to obtain a first electric energy metering device list to be verified on the spot.
9. The system for validating topological relations based on an exhaustive area network according to claim 1, further comprising an operator, specifically:
obtaining a verification result which is returned by the field investigation staff and aims at whether the electricity utilization network topological relation attribution of the first electric energy metering device list to be verified in the field is correct or not;
if the number of errors is judged to exceed a preset threshold value corresponding to the topological relation of the metering devices in the first electric energy metering device list in the verification result, taking the electric energy metering device with the correct verified topological relation in the verification result as a fixed object in the topological relation of the electric energy meter, and iterating to the process of solving the sum difference between the total electric energy meter and the sub-electric energy meters; thereby obtaining the electric energy W of the corresponding general meter0Sum of user sub-meters in topological relation with each electric energy meter
Figure FDA0002223594690000041
And combining the topological relations of the second electric energy meters with the minimum difference.
10. An apparatus for validating an exhaustive area network topology relationship, the apparatus comprising:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor and programmed to perform the exhaustive area network topology relationship validation method of any of claims 1-7.
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