Electricity-obtaining data-based electricity meter topology automatic hitching method and system

Abstract

The invention belongs to the technical field of low-voltage transformer area topology identification, and particularly relates to an electricity-obtaining data-based electricity meter topology automatic hitching method and system. Comprising the following steps: acquiring an opening event of an intelligent tail-end circuit breaker through an intelligent fusion terminal of a low-voltage transformer area; the intelligent fusion terminal issues a closing instruction to the plurality of intelligent tail end circuit breakers in sequence according to a set time interval T; the intelligent fusion terminal receives the electricity obtaining time of the household meters reported after the household meters are electrified, and collects the closing time recorded by the intelligent tail end circuit breakers or the measuring switches; and carrying out clustering comparison on the electricity obtaining time of the household meters and the closing time recorded by the intelligent end circuit breakers or the measuring switches, and determining the hooking object of each household meter. According to the method, the electricity obtaining time of the household meters and the closing time recorded by the intelligent tail end circuit breakers or the measuring switches are subjected to clustering comparison, the hooking object of each household meter is determined, automatic hooking of the household meters is achieved based on the determined hooking objects, and the intelligence and automation degree of precise topology construction is improved.

Description

Technical Field

[0001] This invention belongs to the field of low-voltage transformer area topology identification technology, and particularly relates to a method and system for automatic connection of meter topology based on power data. Background Technology

[0002] With the deepening of smart distribution networks and digital transformation, building accurate digital twins of distribution substations has become the foundation for achieving lean operation and maintenance and intelligent control. As the "last mile" connecting the power grid and users, the accuracy of the topological relationships of low-voltage distribution substations is crucial. Currently, although topology identification technology for low-voltage branch lines has matured, topology identification of user meters and their automatic association with lines remain a challenge for the industry.

[0003] The existing technical solutions have two major drawbacks: First, the topology that relies on the self-identification of the carrier communication module is susceptible to power grid noise interference, and the accuracy cannot be guaranteed; Second, the topology association between the meter and the line depends entirely on manual on-site verification and manual entry. This method is not only time-consuming, labor-intensive, and costly, but also results in a serious lag in the updating of topology data, which cannot meet the needs of real-time and dynamic management and has become a key bottleneck restricting the development of advanced applications in distribution networks. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, this invention provides an automatic meter topology connection method and system based on power data. After power is restored, the power time of the meter is compared with the closing time recorded by each smart terminal circuit breaker or measuring switch to determine the connection object for each meter. Based on the determined connection object, the automatic connection of the meter is realized.

[0005] To achieve the above objectives, one or more embodiments of the present invention provide the following technical solutions: The first aspect of this invention provides a method for automatically connecting electricity meter topologies based on received power data.

[0006] The automatic meter topology connection method based on power data includes the following steps: The tripping event of the intelligent terminal circuit breaker is obtained through the intelligent converged terminal of the low-voltage distribution area. When the closing conditions are met, the intelligent fusion terminal sends closing commands to multiple intelligent terminal circuit breakers sequentially according to a set time interval T. The intelligent converged terminal receives the power-on time reported by each household meter after power-on, and collects the closing time recorded by each intelligent terminal circuit breaker or measuring switch. The power-on time of each household meter is compared with the closing time recorded by each smart terminal circuit breaker or measuring switch to determine the connected object of each household meter. Based on the identified attachment objects, automatic attachment of household meters is achieved.

[0007] A second aspect of the present invention provides an automatic meter topology connection system based on power receiving data.

[0008] An automatic meter topology connection system based on received power data includes: The tripping event monitoring module is configured to: acquire tripping events of intelligent terminal circuit breakers through the intelligent fusion terminal of the low-voltage distribution area; The closing command issuing module is configured to: when the closing conditions are met, the intelligent fusion terminal sequentially issues closing commands to multiple intelligent terminal circuit breakers at a set time interval T. The first-time acquisition module is configured to: receive the power-on time of each household meter after power-on and collect the closing time recorded by each smart terminal circuit breaker or measuring switch. The second time acquisition module is configured to: cluster and compare the power-on time of the household meter with the closing time recorded by each smart terminal circuit breaker or measuring switch to determine the connected object of each household meter. The attachment module is configured to automatically attach user meters based on the identified attachment objects. A third aspect of the present invention provides a computer-readable storage medium having a program stored thereon, which, when executed by a processor, implements the steps of the automatic meter topology connection method based on power data as described in the first aspect of the present invention.

[0009] The fourth aspect of the present invention provides an electronic device, including a memory, a processor, and a program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps in the automatic meter topology connection method based on power data as described in the first aspect of the present invention.

[0010] The above one or more technical solutions have the following beneficial effects: This invention provides a method and system for automatic meter topology connection based on power receiving data. By monitoring tripping events, when closing conditions are met, power is restored by sequentially controlling the closing time of each terminal circuit breaker. Finally, after power restoration, the power receiving time of the customer meter is clustered and compared with the closing time recorded by each smart terminal circuit breaker or measuring switch to determine the connection object for each customer meter. Based on the determined connection object, automatic connection of the customer meter is realized, improving the intelligence and automation of accurate topology construction.

[0011] This invention requires no additional cost and enables precise and automatic connection of electricity meters and branch lines at low cost. It achieves high-precision topology identification at near-zero cost, effectively solving the "last mile" problem of automatic generation of panoramic topology for transformer substations.

[0012] This invention enables intelligent fusion terminals to periodically synchronize the time of all intelligent circuit breakers, measuring switches, and household meters under their jurisdiction via broadcast time synchronization commands, ensuring a unified time base for the entire system.

[0013] Advantages of additional aspects 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. Attached Figure Description

[0014] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0015] Figure 1 This is a typical application architecture diagram of the distribution radio area in Implementation Example 1.

[0016] Figure 2 This is a flowchart of the meter topology analysis operation in Example 1.

[0017] Figure 3 This is a flowchart of the circuit breaker closing control in Example 1.

[0018] Figure 4 This is a flowchart of the method in Example 1.

[0019] The attached diagram lists the components represented by each number as follows: 1. Household meter; 2. Smart converged terminal; 3. Smart residual current protection device; 4. Smart terminal circuit breaker; 5. Measuring switch. Detailed Implementation

[0020] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations of the present invention.

[0022] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0023] Example 1 As mentioned above, to overcome the shortcomings of existing technologies, such as reliance on manual labor, high cost, and low accuracy, this invention provides an automatic meter topology connection method based on power supply data. This method innovatively utilizes the meter's built-in precise power-on time recording function, requiring no additional hardware modifications or signal injection. By activating the undervoltage tripping function of the terminal intelligent circuit breaker, after a planned or fault-related power outage on a branch line and subsequent power restoration, the fusion terminal sequentially controls the circuit breaker to close, creating a highly consistent time cluster between the power supply time of the meter and the circuit breaker on the same line. Correlation analysis is then used to achieve precise and automatic connection between the meter and the branch line.

[0024] This invention achieves high-precision topology recognition at near-zero cost, effectively solving the "last mile" problem of automatic generation of panoramic topology for transformer substations.

[0025] This embodiment applies to low-voltage distribution areas, such as... Figure 1 The diagram shows a typical configuration of a low-voltage distribution area, mainly including a smart fusion terminal 2, a smart residual current protection device 3, a low-voltage smart terminal circuit breaker 4, a meter box, a measuring switch 5, and a customer meter 1. The smart fusion terminal establishes data communication with the low-voltage smart terminal circuit breaker 4, customer meter 1, and other devices through a carrier module, and receives actively reported data from the devices.

[0026] Next Figure 1 The specific setup is described in detail below. A number of household meters 1 are controlled by a single measuring switch 5. A shared measuring switch 5 and multiple household meters 1 (electricity meters) are installed in a meter box. Each measuring switch 5 is connected to a low-voltage intelligent terminal circuit breaker 4, which controls the on / off state of multiple household meters 1 on that circuit. The low-voltage intelligent terminal circuit breaker 4 is installed in the branch box, and is connected to the upstream intelligent residual current protection device 3 through the branch box incoming line, and is connected to the downstream measuring switch 5 through the branch box outgoing line. Multiple intelligent residual current protection devices 3 are connected to the intelligent fusion terminal 2, forming a typical application architecture for the low-voltage distribution area.

[0027] The above Figure 1 The intelligent converged terminal in the context specifically refers to: The Intelligent Converged Terminal (IFT) is a core intelligent device proposed by the State Grid Corporation of China to promote the integration of operation and maintenance services. Through hardware modularization and software app-based integration, it integrates multiple functions such as power quality monitoring, electricity consumption information collection, fault detection, distributed energy access, and electric vehicle charging management, achieving "one terminal per distribution area" and effectively avoiding redundant construction. In the usage scenario of this embodiment, one of the core functions of this terminal is to accurately draw the branch line topology relationship of the distribution area by collecting topology generation data from each branch node and performing comprehensive analysis. Simultaneously, it can also perform in-depth analysis based on the electricity meter's received data, ultimately automatically generating a complete electrical topology map of the distribution area and uploading it to the main station system.

[0028] The function of an intelligent residual current protection device is: (1) When the equipment leaks current or a person accidentally touches a live conductor, the device will quickly (usually within 0.1 seconds) cut off the power supply to avoid fatal electric shock.

[0029] (2) Leakage current may occur in the circuit due to insulation aging or damage. Even if this current is small and not enough to trigger a trip, its long-term presence may cause local overheating and fire. Residual current protection devices can effectively monitor and disconnect such faulty circuits.

[0030] like Figure 4 As shown, the automatic meter topology connection method based on received power data includes the following steps: The tripping event of the intelligent terminal circuit breaker is obtained through the intelligent converged terminal of the low-voltage distribution area. When the closing conditions are met, the intelligent fusion terminal sends closing commands to multiple intelligent terminal circuit breakers sequentially according to a set time interval T. The intelligent converged terminal receives the power-on time reported by each household meter after power-on, and collects the closing time recorded by each intelligent terminal circuit breaker or measuring switch. The power-on time of each household meter is compared with the closing time recorded by each smart terminal circuit breaker or measuring switch to determine the connected object of each household meter. Based on the identified attachment objects, automatic attachment of household meters is achieved.

[0031] The effective implementation of this method relies on a crucial prerequisite: intelligent circuit breakers, measuring switches, and meters within the same low-voltage distribution area must maintain a high degree of clock synchronization. The level of clock consistency among the devices directly determines the accuracy of automatic meter topology connection.

[0032] Therefore, before applying this method, the intelligent fusion terminal needs to periodically (e.g., daily or weekly) use broadcast time synchronization commands to synchronize the time of all intelligent circuit breakers, measuring switches and household meters under its jurisdiction to ensure that the time base of the entire system is consistent.

[0033] After completing the broadcast time synchronization, based on the pre-generated branch line topology, all terminal circuit breakers are configured to activate the undervoltage tripping function, and the system enters the ready state. The specific execution process is described below. Its core is to capture and analyze the power restoration events of the transformer substation caused by planned power outages or faults. After the power restoration event, the power-on time of the customer's meter is compared with the closing time recorded by each intelligent terminal circuit breaker or measuring switch to determine the connection object for each customer's meter. Then, based on the determined connection object, the automatic connection of the customer's meter is realized.

[0034] The pre-generated branch line topology specifically refers to the electrical topology of the distribution area in the low-voltage test bench, from the transformer, JP cabinet, branch box to the meter box incoming switch. This topology does not include household meters.

[0035] The method of this embodiment will now be explained in detail. The specific steps of the method in this embodiment are as follows: Step 1: Power outage monitoring and intelligent control.

[0036] The intelligent fusion terminal acquires the tripping events of the end circuit breakers through periodic data collection or active reporting by the devices, and triggers corresponding logic accordingly: if the circuit breaker trips due to loss of voltage, the terminal will issue closing commands sequentially after power is restored to achieve orderly restoration; if the tripping is caused by factors other than loss of voltage, the maintenance personnel will handle it on-site without remote intervention.

[0037] To further ensure safety, a planned maintenance mode can be added to prevent accidental closing of circuit breakers.

[0038] Step 2: Proactively report power restoration incidents.

[0039] When power is restored after a planned or fault-related power outage in a low-voltage distribution area, each household meter proactively reports a "power restoration event" containing a precise power restoration timestamp to the smart converged terminal upon restoration. Let's assume the meter restoration times are T... b 1. T b 2…T b N, T b 1 represents the time when the first household meter receives electricity, T b 2 represents the power supply time of the second household meter, T b N represents the power supply time for the Nth household meter.

[0040] Step 3: Comprehensive collection of power-on / closing data.

[0041] Upon receiving a power restoration event reported by a customer's meter, the intelligent converged terminal immediately and proactively retrieves the closing time T recorded by all terminal intelligent circuit breakers / measuring switches within its distribution area. d 1. T d 2…T d N, where T d1 represents the closing time recorded by the first intelligent terminal circuit breaker or measuring switch, T d 2 represents the closing time recorded by the second intelligent terminal circuit breaker or measuring switch, T d N represents the closing time recorded by the Nth intelligent terminal circuit breaker or measuring switch. This allows us to obtain a complete set of terminal data with a unified time reference.

[0042] Step 4: Topological association analysis.

[0043] The intelligent fusion terminal analyzes the collected data based on the core principle that "the power-on time of devices on the same power supply branch is highly consistent".

[0044] The algorithm clusters and compares the power-on time of each household meter with the closing time of each terminal smart circuit breaker / measuring switch. Combined with the known main topology of the distribution area, it calculates the affiliation or matching degree between the power-on time of each household meter and the closing time of a certain terminal smart circuit breaker / measuring switch.

[0045] When performing cluster alignment, the following formula is designed: |T b N - T d N| ≤ α; Where α represents the allowable time error range between the upper and lower levels.

[0046] More specifically, the method for determining the linked objects for each household meter is as follows: Set a time error range threshold α; Calculate the difference T between the energization time of the household meter and the closing time recorded by each smart terminal circuit breaker or measuring switch. b N - T d N; Determine the absolute value of the difference |T b N - T d Intelligent terminal circuit breakers or measuring switches with N| less than the time error range threshold α are candidate objects for the current household meter; From the candidate objects, select the absolute value of the difference |T b N - T d N|The smallest intelligent terminal circuit breaker or measuring switch is the target connection object; By iterating through the power-on times of all household meters, the target connection object for each household meter can be determined.

[0047] Step 5: Automatic Update of Topology Based on the analysis results in step four, the intelligent fusion terminal automatically connects the household meter to the end intelligent circuit breaker / measuring switch that best matches its power supply time, generates an accurate and updated household meter-level topology relationship, automatically updates the local topology map, and sends the results to the main station system, thereby completing the entire process of automatic connection of the household meter topology.

[0048] Furthermore, such as Figure 2 As shown, firstly, the intelligent fusion terminal monitors the tripping event of the end circuit breaker. When the tripping event occurs, the cause of the tripping is determined. If it is confirmed that the tripping is caused by voltage loss, it is necessary to wait for the voltage to be restored before taking action. Once the voltage is restored, the smart fusion terminal controls the closing of the circuit breaker sequentially at time intervals T. After the closing is completed, it waits for the return power event from each household's meter. After receiving the power restoration events reported by each household meter, the intelligent fusion terminal calls the closing time data of the terminal circuit breaker; Finally, based on the two types of data obtained above, cluster comparison analysis is performed to realize topological relationship analysis, realize the automatic attachment of user tables, and automatically update the topological relationship.

[0049] like Figure 3 As shown, the intelligent fusion terminal sequentially sends closing commands to multiple intelligent terminal circuit breakers at set time intervals T, specifically including: Number the multiple intelligent terminal circuit breakers under the jurisdiction of the intelligent converged terminal; Closing commands are issued sequentially to multiple intelligent terminal circuit breakers according to their numbering order, with a closing time interval of T between two consecutive intelligent terminal circuit breakers.

[0050] By applying the method of this embodiment, the following can be achieved: 1. Transform the traditional household meter topology connection mode that relies on manual line inspection and manual data entry into a digital mode with intelligent identification and automatic updates.

[0051] 2. Supports real-time dynamic updates, effectively solving the problem of topology data lag caused by power grid transformation.

[0052] 3. No need to modify existing equipment, functionality can be achieved only through software upgrades, reducing implementation costs per unit area.

[0053] 4. Obtaining accurate household-transformer relationships provides a foundation for precise calculation of line loss in the transformer area.

[0054] 5. Supports advanced applications such as accurate fault diagnosis and automatic analysis of power outage range.

[0055] Example 2 This embodiment discloses an automatic meter topology connection system based on power data.

[0056] An automatic meter topology connection system based on received power data includes: The tripping event monitoring module is configured to: acquire tripping events of intelligent terminal circuit breakers through the intelligent fusion terminal of the low-voltage distribution area; The closing command issuing module is configured to: when the closing conditions are met, the intelligent fusion terminal sequentially issues closing commands to multiple intelligent terminal circuit breakers at a set time interval T. The first-time acquisition module is configured to: receive the power-on time of each household meter after power-on and collect the closing time recorded by each smart terminal circuit breaker or measuring switch. The second time acquisition module is configured to: cluster and compare the power-on time of the household meter with the closing time recorded by each smart terminal circuit breaker or measuring switch to determine the connected object of each household meter. The attachment module is configured to automatically attach user meters based on the identified attachment objects. Example 3 The purpose of this embodiment is to provide a computer-readable storage medium.

[0057] A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps in the automatic meter topology connection method based on power data as described in Embodiment 1 of this disclosure.

[0058] Example 4 The purpose of this embodiment is to provide an electronic device.

[0059] An electronic device includes a memory, a processor, and a program stored in the memory and executable on the processor. When the processor executes the program, it implements the steps in the automatic meter topology connection method based on power data as described in Embodiment 1 of this disclosure.

[0060] The steps and methods involved in the apparatuses of Embodiments 2, 3, and 4 above correspond to those in Embodiment 1. For specific implementation details, please refer to the relevant description section of Embodiment 1. The term "computer-readable storage medium" should be understood as a single medium or multiple media including one or more instruction sets; it should also be understood as including any medium capable of storing, encoding, or carrying an instruction set for execution by a processor and enabling the processor to perform any of the methods in this invention.

[0061] Those skilled in the art will understand that the modules or steps of the present invention described above can be implemented using general-purpose computer devices. Optionally, they can be implemented using computer-executable program code, thereby allowing them to be stored in a storage device for execution by a computer device, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. The present invention is not limited to any particular combination of hardware and software.

[0062] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A method for automatically connecting meter topologies based on received power data, characterized in that, Includes the following steps: The tripping event of the intelligent terminal circuit breaker is obtained through the intelligent converged terminal of the low-voltage distribution area. When the closing conditions are met, the intelligent fusion terminal sends closing commands to multiple intelligent terminal circuit breakers sequentially according to a set time interval T. The intelligent converged terminal receives the power-on time reported by each household meter after power-on, and collects the closing time recorded by each intelligent terminal circuit breaker or measuring switch. The power-on time of each household meter is compared with the closing time recorded by each smart terminal circuit breaker or measuring switch to determine the connected object of each household meter. Based on the identified attachment objects, automatic attachment of household meters is achieved.

2. The automatic meter topology connection method based on received power data as described in claim 1, characterized in that, It also includes the intelligent converged terminal periodically synchronizing the time of all intelligent terminal circuit breakers, measuring switches and household meters under its jurisdiction through broadcast time synchronization commands to ensure a unified time base.

3. The automatic meter topology connection method based on power receiving data as described in claim 1, characterized in that, When the intelligent converged terminal of the low-voltage distribution area receives the tripping event of the intelligent terminal circuit breaker: If the intelligent terminal circuit breaker trips due to loss of power, after the power supply to the intelligent terminal circuit breaker is restored, the intelligent fusion terminal will send closing instructions to multiple intelligent terminal circuit breakers in sequence according to the set time interval T to achieve orderly restoration. If the intelligent terminal circuit breaker trips due to factors other than undervoltage, it will be handled on-site by maintenance personnel without remote intervention.

4. The automatic meter topology connection method based on received power data as described in claim 1, characterized in that, The smart converged terminal receives the power-on time reported by each household meter after power is restored, specifically including: When the low-voltage area recovers power supply, each household meter actively reports a power recovery event containing accurate power-on time to the intelligent fusion terminal, wherein the power-on times of the plurality of household meters are respectively represented as T b 1 b 2 b N b 1 is the power-on time of the first household meter, T b 2 is the power-on time of the second household meter, T b N is the power-on time of the Nth household meter.

5. The automatic meter topology connection method based on power receiving data as described in claim 4, characterized in that, The intelligent fusion terminal collects the closing time recorded by each intelligent terminal circuit breaker or measuring switch, specifically including: After receiving a power restoration event reported by a customer meter, the intelligent converged terminal actively detects the closing time T recorded by all intelligent terminal circuit breakers or measuring switches within its distribution area. d 1. T d 2…T d N, where T d 1 represents the closing time recorded by the first intelligent terminal circuit breaker or measuring switch, T d 2 represents the closing time recorded by the second intelligent terminal circuit breaker or measuring switch, T d N represents the closing time recorded by the Nth intelligent terminal circuit breaker or measuring switch.

6. The automatic meter topology connection method based on received power data as described in claim 1, characterized in that, The specific method for determining the linked objects for each household meter is as follows: Set a time error range threshold; Calculate the difference between the power-on time of the household meter and the closing time recorded by each smart terminal circuit breaker or measuring switch. Intelligent terminal circuit breakers or measuring switches whose absolute value of the difference is less than the time error range threshold are considered as candidate objects for the current household meter. From the candidate objects, select the intelligent terminal circuit breaker or measuring switch with the smallest absolute value of the difference as the target connection object; By iterating through the power-on times of all household meters, the target connection object for each household meter can be determined.

7. The automatic meter topology connection method based on power receiving data as described in claim 1, characterized in that, The intelligent fusion terminal sequentially sends closing commands to multiple intelligent terminal circuit breakers at set time intervals T, specifically including: Number the multiple intelligent terminal circuit breakers under the jurisdiction of the intelligent converged terminal; Closing commands are issued sequentially to multiple intelligent terminal circuit breakers according to their numbering order, with a closing time interval of T between two consecutive intelligent terminal circuit breakers.

8. An automatic meter topology connection system based on received power data, characterized in that, include: The tripping event monitoring module is configured to: acquire tripping events of intelligent terminal circuit breakers through the intelligent fusion terminal of the low-voltage distribution area; The closing command issuing module is configured to: when the closing conditions are met, the intelligent fusion terminal sequentially issues closing commands to multiple intelligent terminal circuit breakers at a set time interval T. The first-time acquisition module is configured to: receive the power-on time of each household meter after power-on and collect the closing time recorded by each smart terminal circuit breaker or measuring switch. The second time acquisition module is configured to: cluster and compare the power-on time of the household meter with the closing time recorded by each smart terminal circuit breaker or measuring switch to determine the connected object of each household meter. The attachment module is configured to automatically attach user meters based on the identified attachment objects.

9. A computer-readable storage medium having a program stored thereon, characterized in that, When the program is executed by the processor, it implements the steps in the automatic meter topology connection method based on power data as described in any one of claims 1-7.

10. An electronic device comprising a memory, a processor, and a program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps in the automatic meter topology connection method based on power data as described in any one of claims 1-7.

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