CN114123179B - Method, system, device, medium, and chip equipment for identifying low-voltage area topology - Google Patents
Method, system, device, medium, and chip equipment for identifying low-voltage area topology Download PDFInfo
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- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
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Abstract
The invention discloses a method, a system, a device, a medium and chip equipment for identifying low-voltage area topology, wherein the identification method comprises the following steps: acquiring a main road actual measurement current value of each user in a low-voltage transformer area and a branch road actual measurement current value of each ammeter; inputting the actual measured current value of the branch circuit into a pre-established perceptron model to obtain an expected current value of the main circuit; according to the actual measured current value of the main circuit and the expected current value of the main circuit, a loss function is obtained; and determining the topological relation between the user electricity meter and the distribution transformer in the low-voltage transformer area according to the loss function. The identification method does not need to adopt signals such as power line carrier or current pulse, so that misjudgment caused by inaccurate signals does not exist; the current transformer is not required to be arranged on the outgoing line side of the transformer, so that the safety is high; a large number of field devices are not required to be arranged, and the economy is good; and the operator does not need to check every household, so that the workload is low.
Description
Technical Field
The invention relates to the technical field of low-voltage power distribution, in particular to a method, a system and a device for identifying low-voltage transformer area topology, a medium and chip equipment.
Background
The electricity consumption information system consists of a main station, a concentrator, a collector and an ammeter, and an electric company transmits a district (power supply range or area of a transformer) file to the concentrator through the main station to serve as a basis for collecting electricity consumption information of the ammeter. Therefore, whether the district profile corresponds to the topology of the actual transformer-electricity meter will directly affect the marketing management level of the electric company.
In recent years, in order to promote the construction of smart grids, low-voltage centralized meter reading transformation projects are gradually developed in various places. However, because the management and control on the field construction quality is not tight, the phenomenon of line connection error often occurs, so that the region file is wrong. In addition, some old cells are complicated in lines, and topological relations are difficult to identify due to imperfect maintenance of the cell files, no update of table changing information and the like. The problem is that the corresponding relation between the ammeter and the transformer cannot be accurately obtained, so that meter reading error phenomenon can be caused, and the management level of the line loss of the transformer area is reduced.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, an object of the present invention is to propose a method for identifying a low-voltage area topology, so as to identify the low-voltage area topology safely, reliably and economically.
A second object of the present invention is to provide a low-voltage transformer area topology identification device.
A third object of the present invention is to propose a computer readable storage medium.
A fourth object of the invention is to propose a chip device.
A fifth object of the present invention is to provide a system for identifying a topology of a low-voltage transformer area.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a method for identifying a topology of a low-voltage station, the method comprising the following steps: acquiring a main road actual measurement current value of each user in a low-voltage transformer area and a branch road actual measurement current value of each ammeter; inputting the actual measured current value of the branch to a pre-established perceptron model to obtain an expected current value of a main road; obtaining a loss function according to the measured current value of the main road and the expected current value of the main road; and determining the topological relation between the user ammeter and the distribution transformer in the low-voltage transformer area according to the loss function.
According to the identification method of the low-voltage area topology, a perceptron model is built in advance when identification is carried out, and then the low-voltage area topology is obtained through identification according to the perceptron model, the main road and the current of each ammeter. The identification method does not need to adopt signals such as power line carrier or current pulse, so that misjudgment caused by inaccurate signals does not exist; the current transformer is not required to be arranged on the outgoing line side of the transformer, so that the safety is high; a large number of field devices are not required to be arranged, and the economy is good; and the operator does not need to check every household, so that the workload is low.
In addition, the identification method of the low-voltage area topology in the embodiment of the invention can also have the following additional technical characteristics:
According to an embodiment of the present invention, when the number of users in the low-voltage area is 1, the pre-established perceptron model is:
Wherein y pred is the expected current value of the trunk of the user, n is the number of the electric meters of the user, a k is the service condition of the kth electric meter, a k is 0 or 1, x k is the actual measured current value of the branch of the kth electric meter, and k is a positive integer.
According to an embodiment of the present invention, when the number of users in the low-voltage area is m, the pre-established perceptron model is:
Wherein y pred is the expected current value of the trunk of m users, n is the number of electricity meters of each user, a k is the service condition of the kth electricity meter under each user, a k is 0 or 1, x k is the actual measured current value of the branch of the kth electricity meter under each user, and k is a positive integer.
According to one embodiment of the invention, the loss function is obtained by the following formula:
and loss is a loss function, and y is the measured current value of the trunk.
According to one embodiment of the present invention, the determining the topology relationship between the user electric meter and the distribution transformer according to the loss function includes:
And solving the minimum value of the loss function to obtain a vector matrix composed of parameters a k, and taking the vector matrix as the topological relation between the user electricity meter and the distribution transformer.
According to one embodiment of the present invention, the solving the minimum value of the loss function to obtain the vector matrix composed of the parameters a k includes:
and (3) performing bias derivative on a k in the loss function to obtain:
and calculating a vector matrix composed of parameters a k when the loss function takes the minimum value according to loss' ak.
To achieve the above object, an embodiment of a second aspect of the present invention provides an identification device for a low-voltage station topology, the identification device including: the acquisition module is used for acquiring the trunk measured current value of each user in the low-voltage transformer area and the branch measured current value of each ammeter; the calculation module is used for inputting the actual measurement current value of the branch into a pre-established perceptron model to obtain an expected current value of the main road, and obtaining a loss function according to the actual measurement current value of the main road and the expected current value of the main road; and the determining module is used for determining the topological relation between the user ammeter and the distribution transformer according to the loss function.
The identification device of the low-voltage area topology of the embodiment of the invention establishes a perception machine model in advance when the identification is carried out, and then the low-voltage area topology is obtained by identification according to the perception machine model, the main road and the current of each ammeter. The identification device does not need to adopt signals such as power line carrier or current pulse, so that misjudgment caused by inaccurate signals does not exist; the current transformer is not required to be arranged on the outgoing line side of the transformer, so that the safety is high; a large number of field devices are not required to be arranged, and the economy is good; and the operator does not need to check every household, so that the workload is low.
In addition, the identification device of the low-voltage area topology in the embodiment of the invention can also have the following additional technical characteristics:
According to an embodiment of the present invention, the calculation module is specifically configured to input the branch actual measurement current value to the following pre-established perceptron model when the number of users in the low-voltage station is 1:
Wherein y pred is the expected current value of the trunk of the user, n is the number of the electric meters of the user, a k is the service condition of the kth electric meter, a k is 0 or 1, x k is the actual measured current value of the branch of the kth electric meter, and k is a positive integer.
According to an embodiment of the present invention, the calculation module is specifically configured to input the branch actual measurement current value to the following pre-established perceptron model when the number of users in the low-voltage station is m:
Wherein y pred is the expected current value of the trunk of m users, n is the number of electricity meters of each user, a k is the service condition of the kth electricity meter under each user, a k is 0 or 1, x k is the actual measured current value of the branch of the kth electricity meter under each user, and k is a positive integer.
According to one embodiment of the invention, the calculation module is specifically configured to obtain the loss function by the following formula:
and loss is a loss function, and y is the measured current value of the trunk.
According to one embodiment of the present invention, the determining module is specifically configured to: and solving the minimum value of the loss function to obtain a vector matrix composed of parameters a k, and taking the vector matrix as the topological relation between the user electricity meter and the distribution transformer.
According to an embodiment of the present invention, when the determining module solves the minimum value of the loss function to obtain a vector matrix composed of parameters a k, the determining module is specifically configured to: and (3) performing bias derivative on a k in the loss function to obtain: according to/> And calculating a vector matrix formed by parameters a k when the loss function takes a minimum value.
To achieve the above object, an embodiment of a third aspect of the present invention provides a computer readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the method for identifying a low-voltage area topology according to the above embodiment.
To achieve the above object, a fourth aspect of the present invention provides a chip device, including a memory, a processor, and a computer program stored on the memory, where the computer program, when executed by the processor, implements the method for identifying a low-voltage area topology according to the above embodiment.
To achieve the above object, an embodiment of a fifth aspect of the present invention provides a system for identifying a topology of a low-voltage station, including: the current detection device is used for detecting the main road current of the low-voltage station area user to obtain a main road actual measurement current value; the user ammeter is used for detecting the current of the branch to which the user ammeter belongs to obtain the actually measured current value of the branch; the chip device according to the fourth embodiment is connected to the current detecting means and the electricity meter, respectively.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a flow chart of a method of identifying a low voltage zone topology in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of an exemplary low voltage zone topology of the present invention;
FIG. 3 is a block diagram of a low voltage station topology identification device according to an embodiment of the present invention;
fig. 4 is a block diagram of a low voltage station topology identification system according to an embodiment of the present invention.
Detailed Description
In order to accurately identify the topological structure of the low-voltage station area, a station area identifier is proposed in the related art. The station identifier generally uses a PLC (Power line Communication, power line carrier communication) technology or a current pulse technology to determine the correspondence between the transformer and the ammeter by sending and receiving signals. However, in the practical application process, this manner of determining through signals may cause erroneous determination due to inaccurate signals.
Specifically, for PLC technology, when the transformer side cannot completely isolate the signal from leakage, the carrier signal is coupled to other stations, resulting in lower signal reliability. For the pulse current technology, a current transformer is required to be installed on the outgoing side of a transformer, a slave on the user side sends a pulse current signal through the current transformer, a host on the low-voltage side of the transformer receives the pulse current signal, the user attribution is judged through harmonic analysis, and misjudgment is caused if the pulse current signal is out of the rule. And, install the current transformer in the transformer outgoing line side, have certain danger.
In addition, some technologies have proposed a method for checking devices. Although the method can save labor cost, a large number of field devices are required to be arranged or operators are required to check the field devices from one user to another, and the workload is very large.
Therefore, the invention provides a low-voltage area topology identification scheme to safely, reliably and economically identify the low-voltage area topology.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The following describes a method, a system, a device, a storage medium and a chip device for identifying a low-voltage area topology according to an embodiment of the present invention with reference to the accompanying drawings
Fig. 1 is a flowchart of a method for identifying a low-voltage station topology according to an embodiment of the present invention.
As shown in fig. 1, the method for identifying the topology of the low-voltage area includes the following steps:
s1, acquiring a main circuit actual measurement current value of each user in a low-voltage transformer area and a branch circuit actual measurement current value of each ammeter.
The low voltage transformer area may have at least a transformer layer (including one transformer) and a customer electrical skin (including one or more customers, each customer including one or more electricity meters).
Specifically, the identification method of the low-voltage station area topology can be used for chip equipment, and the low-voltage station area can be respectively provided with a main current sensor corresponding to each user for acquiring a main current actually measured value of the corresponding user; the ammeter of each user can be used for acquiring the branch actual measurement current value of the corresponding branch.
S2, inputting the actual measured current value of the branch circuit into a pre-established perceptron model to obtain the expected current value of the main circuit.
As an example, when the number of users in the low-voltage area is 1, the pre-established perceptron model is:
Wherein y pred is the expected current value of the trunk of the user, n is the number of the electric meters of the user, a k is the service condition of the kth electric meter, a k is 0 or 1, x k is the actual measured current value of the branch of the kth electric meter, and k is a positive integer.
Specifically, taking a single-user multi-meter (4 meters) as an example, as shown in fig. 2, y represents the current on the main circuit, x 1、x2、x3、x4 represents the current on the corresponding branch circuits of the meters 1,2, 3 and 4, and the following relationship exists:
yA＝x1+x2+x3+x4 (1)
Since it is not determined whether the electric meter on each branch is in use or in a state of being powered, a parameter a k(ak =0 or 1 may be added to the above formula, where k is a positive integer and the maximum value is the number of electric meters. Then, the above formula (1) can be converted into the following formula (2):
assuming n meters are present, equation (2) is converted into:
Formula (3) can be further converted into the following formula (4):
The above formula (4) can be written as: obtaining the pre-established perceptron model.
As another example, when the number of users in the low-voltage area is m, the pre-established perceptron model is:
Wherein y pred is the expected current value of the trunk of m users, n is the number of the electric meters of each user, a k is the service condition of the kth electric meter under each user, a k is 0 or 1, x k is the actually measured current value of the branch of the kth electric meter under each user, and k is a positive integer.
In this example, the above-described calculation process of the single-user multi-meter can be extended to the multi-user multi-meter as follows:
wherein y1, y2, y3 are the trunk currents of the 1 st, 2 nd, 3 rd users, respectively.
Further, the total main current can be obtained: The perceptron models corresponding to the m users can be obtained.
S3, a loss function is obtained according to the actual measured current value of the trunk and the expected current value of the trunk.
As an example, when the number of users is 1, the loss function is obtained by the following formula:
where loss is a loss function, and y is a measured current value of the main circuit.
Specifically, when the topology identification of the low-voltage station is performed, the smaller the difference between the expected actual current value y and the expected current value y perd is, the better. In this example, half of the square of the difference between the measured current value y and the desired current value y perd may be taken as a loss function as follows:
and S4, determining the topological relation between the user ammeter and the distribution transformer in the low-voltage transformer area according to the loss function.
Specifically, determining the topology of the utility meter and the distribution transformer according to the loss function may include: and solving the minimum value of the loss function to obtain a vector matrix composed of parameters a k, and taking the vector matrix as the topological relation between the user electricity meter and the distribution transformer.
Specifically, after the loss function is obtained, the problem of identifying the low-voltage area topology can be converted into a problem of solving the minimum value of the loss function. At this time, a k in the loss function can be biased to obtain: according to/> To calculate the vector matrix composed of parameters a k when the loss function takes the minimum value. The iterative update expression of the parameter a k in the vector matrix may be:
Where y i represents the i-th measured current value, y i-pred represents the i-th desired current value, a k,i represents the value before the i-th update of the parameter a k, and a k,i+1 represents the value after the i-th update of the parameter a k.
In summary, the identification method of the low-voltage area topology according to the embodiment of the invention establishes a perceptron model in advance when the identification is performed, and then identifies and obtains the low-voltage area topology according to the perceptron model, the main road and the current of each ammeter. The identification method does not need to adopt signals such as power line carrier or current pulse, so that misjudgment caused by inaccurate signals does not exist; the current transformer is not required to be arranged on the outgoing line side of the transformer, so that the safety is high; a large number of field devices are not required to be arranged, and the economy is good; and the operator does not need to check every household, so that the workload is low.
Fig. 3 is a block diagram of a low-voltage station topology identification device according to an embodiment of the present invention.
As shown in fig. 3, the identification device 100 includes: an acquisition module 10, a calculation module 20 and a determination module 30. The acquisition module 10 is used for acquiring the trunk actual measurement current value of each user in the low-voltage transformer area and the branch actual measurement current value of each ammeter; the calculation module 20 is configured to input a branch actual measurement current value to a pre-established perceptron model, obtain a main expected current value, and obtain a loss function according to the main actual measurement current value and the main expected current value; the determination module 30 is configured to determine a topology of the consumer electricity meter and the distribution transformer based on the loss function.
As an example, the calculation module 20 is specifically configured to input the branch actual measurement current value to the following pre-established perceptron model when the number of users in the low-voltage transformer area is 1:
Wherein y pred is the expected current value of the trunk of the user, n is the number of the electric meters of the user, a k is the service condition of the kth electric meter, a k is 0 or 1, x k is the actual measured current value of the branch of the kth electric meter, and k is a positive integer.
In this example, the loss function may be derived by the following formula:
where loss is a loss function, and y is a measured current value of the main circuit.
Further, the calculation module 20 is specifically configured to, when determining the topology relationship between the consumer electric meter and the distribution transformer according to the loss function: and solving the minimum value of the loss function to obtain a vector matrix composed of parameters a k, and taking the vector matrix as the topological relation between the user electricity meter and the distribution transformer.
The calculation module 20 may be specifically configured to, when solving the minimum value of the loss function to obtain a vector matrix composed of parameters a k: and (3) performing bias derivation on a k in the loss function to obtain: according to/> And calculating a vector matrix formed by parameters a k when the loss function takes a minimum value.
As another example, the calculation module 20 is specifically configured to input the branch actual measurement current value to the following pre-established perceptron model when the number of users in the low-voltage transformer area is m:
Wherein y pred is the expected current value of the trunk of m users, n is the number of the electric meters of each user, a k is the service condition of the kth electric meter under each user, a k is 0 or 1, x k is the actually measured current value of the branch of the kth electric meter under each user, and k is a positive integer.
It should be noted that, for other specific implementations of the apparatus for identifying a low-voltage area topology according to the embodiment of the present invention, reference may be made to specific implementations of the method for identifying a low-voltage area topology according to the foregoing embodiment of the present invention.
The identification device of the low-voltage area topology of the embodiment of the invention establishes a perception machine model in advance when the identification is carried out, and then the low-voltage area topology is obtained by identification according to the perception machine model, the main road and the current of each ammeter. The identification device does not need to adopt signals such as power line carrier or current pulse, so that misjudgment caused by inaccurate signals does not exist; the current transformer is not required to be arranged on the outgoing line side of the transformer, so that the safety is high; a large number of field devices are not required to be arranged, and the economy is good; and the operator does not need to check every household, so that the workload is low.
Based on the above-mentioned identification method of low-voltage area topology, the invention provides a computer readable storage medium.
In this embodiment, a computer program is stored on a computer readable storage medium, and when the computer program is executed by a processor, the method for identifying a low-voltage area topology according to the above embodiment is implemented.
Based on the identification method of the low-voltage area topology, the invention further provides chip equipment.
In this embodiment, the chip device includes a memory, a processor, and a computer program stored on the memory, which when executed by the processor, implements the method for identifying a low voltage zone topology of the above embodiment.
Fig. 4 is a block diagram of a low voltage station topology identification system according to an embodiment of the present invention.
As shown in fig. 4, the identification system 200 of the low-voltage station topology includes: a current detection device 1, a consumer electricity meter 2 and a chip apparatus 3 of the above embodiment.
The current detection device 1 is used for detecting the main road current of a low-voltage station user to obtain a main road actual measurement current value. The user ammeter 2 is used for detecting the current of the branch to which the user ammeter belongs to obtain the actually measured current value of the branch. The chip device 3 is connected to the current detecting means 1 and the consumer meter 2, respectively, which connection may be a wireless communication connection.
In some embodiments of the present invention, the number of users in the low-voltage area is the same as the number of current detection devices 1, and is one or more, and there may be a plurality of user meters 2 under each user name.
The identification system of the low-voltage area topology does not need to adopt signals such as power line carrier or current pulse, so that misjudgment caused by inaccurate signals does not exist; the current transformer is not required to be arranged on the outgoing line side of the transformer, so that the safety is high; a large number of field devices are not required to be arranged, and the economy is good; and the operator does not need to check every household, so that the workload is low.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, for example, may be considered as a ordered listing of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (11)
1. A method for identifying a topology of a low voltage station, the method comprising the steps of:
acquiring a main road actual measurement current value of each user in a low-voltage transformer area and a branch road actual measurement current value of each ammeter;
Inputting the actual measured current value of the branch to a pre-established perceptron model to obtain an expected current value of a main road;
Obtaining a loss function according to the measured current value of the main road and the expected current value of the main road;
determining the topological relation between the user ammeter and the distribution transformer in the low-voltage transformer area according to the loss function;
when the number of users in the low-voltage area is 1, the pre-established perceptron model is as follows:
Wherein y pred is the expected current value of the trunk of the user, n is the number of the electric meters of the user, a k is the service condition of the kth electric meter, a k is 0 or 1, x k is the actual measured current value of the branch of the kth electric meter, and k is a positive integer;
When the number of users in the low-voltage area is m, the pre-established perceptron model is as follows:
Wherein y pred is the expected current value of the trunk of m users, n is the number of electricity meters of each user, a k is the service condition of the kth electricity meter under each user, a k is 0 or 1, x k is the actual measured current value of the branch of the kth electricity meter under each user, and k is a positive integer.
2. The method of identifying a low voltage zone topology of claim 1, wherein the loss function is obtained by the following formula:
and loss is a loss function, and y is the measured current value of the trunk.
3. The method for identifying a topology of a low voltage distribution network as recited in claim 2, wherein said determining a topology relationship of a utility meter to a distribution transformer based on said loss function comprises:
And solving the minimum value of the loss function to obtain a vector matrix composed of parameters a k, and taking the vector matrix as the topological relation between the user electricity meter and the distribution transformer.
4. A method for identifying a topology of a low voltage transformer area according to claim 3, wherein said solving the minimum of the loss function to obtain a vector matrix composed of parameters a k comprises:
and (3) performing bias derivative on a k in the loss function to obtain:
According to And calculating a vector matrix formed by parameters a k when the loss function takes a minimum value.
5. An identification device for a low voltage station topology, the identification device comprising:
The acquisition module is used for acquiring the trunk measured current value of each user in the low-voltage transformer area and the branch measured current value of each ammeter;
the calculation module is used for inputting the actual measurement current value of the branch into a pre-established perceptron model to obtain an expected current value of the main road, and obtaining a loss function according to the actual measurement current value of the main road and the expected current value of the main road;
the determining module is used for determining the topological relation between the user ammeter and the distribution transformer according to the loss function;
the calculation module is specifically configured to input the branch actual measurement current value to the following pre-established perceptron model when the number of users in the low-voltage transformer area is 1:
Wherein y pred is the expected current value of the trunk of the user, n is the number of the electric meters of the user, a k is the service condition of the kth electric meter, a k is 0 or 1, x k is the actual measured current value of the branch of the kth electric meter, and k is a positive integer;
The calculation module is specifically configured to input the branch actual measurement current value to the following pre-established perceptron model when the number of users in the low-voltage transformer area is m:
Wherein y pred is the expected current value of the trunk of m users, n is the number of electricity meters of each user, a k is the service condition of the kth electricity meter under each user, a k is 0 or 1, x k is the actual measured current value of the branch of the kth electricity meter under each user, and k is a positive integer.
6. The apparatus for identifying a low voltage zone topology as recited in claim 5, wherein the calculation module is configured to obtain the loss function by:
and loss is a loss function, and y is the measured current value of the trunk.
7. The apparatus for identifying a topology of a low voltage station as recited in claim 6, wherein the determining module is specifically configured to:
And solving the minimum value of the loss function to obtain a vector matrix composed of parameters a k, and taking the vector matrix as the topological relation between the user electricity meter and the distribution transformer.
8. The apparatus for identifying a topology of a low voltage transformer area according to claim 7, wherein the determining module is configured to, when solving the minimum value of the loss function to obtain a vector matrix composed of parameters a k:
and (3) performing bias derivative on a k in the loss function to obtain:
According to And calculating a vector matrix formed by parameters a k when the loss function takes a minimum value.
9. A computer readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, implements a method of identifying a low voltage station topology as claimed in any of claims 1-4.
10. Chip device comprising a memory, a processor and a computer program stored on the memory, characterized in that the computer program, when executed by the processor, implements a method of identifying a low voltage station topology according to any of claims 1-4.
11. A system for identifying a topology of a low voltage site, comprising:
The current detection device is used for detecting the main road current of the low-voltage station area user to obtain a main road actual measurement current value;
the user ammeter is used for detecting the current of the branch to which the user ammeter belongs to obtain the actually measured current value of the branch;
the chip device of claim 10, said chip device being connected to said current sensing means and said consumer electricity meter, respectively.
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