Low-voltage distribution network topology connection verification method, device, equipment and storage medium

Abstract

The present invention discloses a method, device, equipment and storage medium for verifying the topology connection of a low-voltage distribution network. The low-voltage distribution network includes n load nodes and their corresponding feeders. The topology connection verification method includes: obtaining a voltage sample space; the voltage sample space includes voltage curves of the n load nodes within a preset time period; determining the correlation and distance between the voltage curves of different load nodes based on the voltage sample space; determining the correlation between different load nodes based on the correlation and distance between the voltage curves of different load nodes; and determining whether different load nodes belong to the same feeder based on the correlation, thereby completing feeder verification. The technical solution of the present invention determines the correlation between different load nodes based on the correlation and distance between the voltage curves of different load nodes, thereby improving the accuracy of the topology connection verification of the distribution network.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage distribution network, and in particular to a method, device, equipment and storage medium for verifying the topological connection of a low-voltage distribution network. Background Art

[0002] The topology of the distribution network is the basis for the state estimation of the distribution network. Due to the frequent changes in the topological connections of the distribution network, this information is often missed, misreported, or not entered into the system in a timely manner. Topological information errors are common in GIS, making it impossible for dispatchers to grasp the topological relationship in a timely manner, which in turn seriously affects the energy management and control of the distribution system. Therefore, how to accurately verify and correct the topological relationship of the distribution network is of great practical significance.

[0003] Grey correlation analysis can determine the closeness of connections between different data sequences based on the geometric shape of the sequence curves. It offers a simple calculation method and a wide range of applications. Existing techniques typically use grey correlation analysis for distribution network topology verification, but this method suffers from significant errors and limitations in certain special cases. It also suffers from the drawback of being unable to determine the distance between data sequences, which can easily lead to misjudgment of correlation calculation results, resulting in poor accuracy in distribution network topology verification results. Summary of the Invention

[0004] The present invention provides a low-voltage distribution network topology connection verification method, device, equipment and storage medium to solve the defects in the prior art and improve the accuracy of distribution network topology connection verification.

[0005] In a first aspect, the present invention provides a method for verifying a topological connection of a low-voltage distribution network, wherein the low-voltage distribution network includes n load nodes and their respective feeders; the method for verifying a topological connection includes:

[0006] Acquire a voltage sample space; the voltage sample space includes voltage curves of n load nodes within a preset time period;

[0007] Determining, based on the voltage sample space, the correlation and distance between the voltage curves of different load nodes;

[0008] Determining the correlation between the different load nodes according to the correlation degree and distance between the voltage curves of the different load nodes;

[0009] According to the correlation, it is determined whether different load nodes belong to the same feeder, and the feeder verification is completed.

[0010] Optionally, determining whether different load nodes belong to the same feeder according to the correlation includes:

[0011] If the correlation between the different load nodes is greater than or equal to a preset correlation value, it is determined that the different load nodes belong to the same feeder;

[0012] If the correlation between the different load nodes is less than the preset correlation value, it is determined that the different load nodes do not belong to the same feeder.

[0013] Optionally, the low-voltage distribution network further includes a transformer;

[0014] After the feeder verification is completed, it is determined based on the correlation whether different load nodes belong to the same feeder, and further includes:

[0015] According to the amplitudes of the voltage curves of the different load nodes, the distribution positions of the load nodes on the feeder lines to which they belong relative to the transformer are determined, thereby completing the distribution verification.

[0016] Optionally, after completing the distribution verification, it also includes:

[0017] According to the structure of the feeder verification and the structure of the distribution verification, the low-voltage distribution network topology connection is corrected.

[0018] Optionally, before acquiring the voltage sample space, the method further includes:

[0019] Data preprocessing is performed on the voltage measurement values ​​of each load node to eliminate and / or correct erroneous data.

[0020] Optionally, the preset time period includes s time sections; the voltage sample space is expressed in matrix form as:

[0021]

[0022] Or expressed as a data sequence:

[0023] U i =(U i (1),U i (2),…,U i (s));

[0024] Among them, i=1,..,n,U i (1)=U 1,t1 , U i (s)=U 1,ts ;

[0025] Determining the correlation and distance between the voltage curves of different load nodes according to the voltage sample space includes:

[0026] Determining the correlation between the voltage curves of different load nodes according to a correlation formula between the voltage curves of different load nodes;

[0027] Determine the distance between the voltage curves of different load nodes according to a distance formula between voltage curves of different load nodes;

[0028] The correlation formula satisfies:

[0029]

[0030] Where i≠j, j=1,..,n; Δ min U i (w)-U j The minimum value of (w)|, Δ max for

[0031] |U i (w)-U j The maximum value of (w)|, w=1,..,s; σ is the first coefficient value;

[0032] The distance formula satisfies:

[0033]

[0034] Optionally, determining the correlation between the different load nodes according to the correlation degree and distance between the voltage curves of the different load nodes includes:

[0035] Determine the correlation between the different load nodes according to a correlation formula;

[0036] The correlation formula satisfies:

[0037] ξ ij =ρ1δ ij +ρ2(1-γ ij );

[0038] Wherein, ρ1 is the first weight coefficient, ρ2 is the second weight coefficient, and ρ1+ρ2=1.

[0039] In a second aspect, the present invention provides a low-voltage distribution network topology connection verification device, comprising:

[0040] An acquisition module, configured to acquire a voltage sample space; the voltage sample space includes voltage curves of n load nodes within a preset time period;

[0041] A correlation and distance determination module, configured to determine the correlation and distance between the voltage curves of different load nodes based on the voltage sample space;

[0042] a correlation determination module, configured to determine the correlation between the different load nodes based on the correlation degree and distance between the voltage curves of the different load nodes;

[0043] The feeder verification module is used to determine whether different load nodes belong to the same feeder based on the correlation, and complete the feeder verification.

[0044] In a third aspect, the present invention provides a verification device, comprising:

[0045] one or more processors;

[0046] a storage device for storing one or more programs;

[0047] When the one or more programs are executed by the one or more processors, the one or more processors implement any of the above-mentioned low-voltage distribution network topology connection verification methods.

[0048] In a fourth aspect, the present invention provides a computer-readable storage medium, characterized in that the computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the low-voltage distribution network topology connection verification method described in any one of the above items is implemented.

[0049] The technical solution of the present invention obtains a voltage sample space, which includes voltage curves of n load nodes within a preset time period, so as to determine the correlation and distance between the voltage curves of different load nodes, and then determine the correlation between different load nodes based on the correlation and distance between the voltage curves of different load nodes. Finally, it is judged whether different load nodes belong to the same feeder based on the correlation, and the feeder verification is completed. In this way, the correlation between different load nodes is determined by comprehensively measuring the correlation and distance between the voltage curves of different load nodes, avoiding the problem of incorrect correlation judgment between different load nodes caused by ignoring the distance between the voltage curves of different load nodes. The voltage sample space can accurately complete the verification of the low-voltage distribution network topology connection without a specific distribution form, has the advantages of simple method and wide application range, and at the same time, improves the accuracy of the distribution network topology connection verification.

[0050] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0052] Figure 1 A schematic diagram of the structure of a low-voltage distribution network provided by an embodiment of the present invention;

[0053] Figure 2 A flowchart of a low-voltage distribution network topology connection verification method provided in Example 1 of the present invention;

[0054] Figure 3 A flowchart of a low-voltage distribution network topology connection verification method provided in the second embodiment of the present invention;

[0055] Figure 4 A flowchart of a low-voltage distribution network topology connection verification method provided in the third embodiment of the present invention;

[0056] Figure 5 A schematic diagram of a low-voltage distribution network topology connection verification device provided in accordance with the fourth embodiment of the present invention DETAILED DESCRIPTION

[0057] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0058] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0059] Example 1

[0060] An embodiment of the present invention provides a method for verifying the topological connection of a low-voltage distribution network, wherein the low-voltage distribution network includes n load nodes and their associated feeders. In an exemplary embodiment, Figure 1 A schematic diagram of a low-voltage distribution network structure provided by an embodiment of the present invention, referring to Figure 1As shown, the low-voltage distribution network includes a transformer 1 and two feeders 2 connected to the transformer. Loads 3 of different positions and sizes are distributed on each feeder. The number of load nodes is n, and each load can be equipped with a measuring device such as an electric meter. It should be noted that Figure 1 The illustrated embodiment only takes the low-voltage distribution network including two feeders as an example. In fact, the embodiment of the present invention does not impose any limitation on the number of feeders.

[0061] The low-voltage distribution network topology connection verification method can be used to verify and correct the topology structure of the low-voltage distribution network. The low-voltage distribution network topology connection verification method can be executed by the low-voltage distribution network topology connection verification device provided by an embodiment of the present invention. The verification device is implemented in the form of hardware and / or software, and the verification device can be integrated into the verification equipment. Figure 2 This is a flowchart of a low-voltage distribution network topology connection verification method provided in Example 1 of the present invention, referring to Figure 2 As shown, the low-voltage distribution network topology connection verification method specifically includes:

[0062] S110 : Acquire a voltage sample space.

[0063] The voltage sample space includes voltage curves of n load nodes within a preset time period. The preset time period may be a manually pre-set period of time. The voltage of each load node is obtained multiple times within the preset time period. The voltage sample space may be a voltage curve formed by the voltages of the n load nodes obtained multiple times within the preset time period.

[0064] S120 : Determine the correlation and distance between voltage curves of different load nodes according to the voltage sample space.

[0065] The correlation between the voltage curves of different load nodes may be the similarity of the shapes of the voltage curves between any two different load nodes. The distance between the voltage curves of different load nodes may be the distance between any two different load nodes.

[0066] S130 : Determine the correlation between different load nodes based on the correlation degree and distance between the voltage curves of different load nodes.

[0067] The correlation between different load nodes may be the degree of correlation between two different load nodes. The greater the correlation between different load nodes, the greater the correlation between their voltage values.

[0068] S140: Determine whether different load nodes belong to the same feeder based on the correlation, and complete the feeder verification.

[0069] Among them, the feeder can refer to the branch connected to any distribution node in the low-voltage distribution network. If two different load nodes belong to the same feeder, the voltage values ​​between the two load nodes are highly correlated, and their correlation is relatively large; correspondingly, if two different load nodes do not belong to the same feeder, the voltage values ​​between the two load nodes are not highly correlated, that is, their correlation is relatively small. Therefore, it is possible to determine whether different load nodes belong to the same feeder based on the correlation between different load nodes to complete the feeder verification.

[0070] Specifically, when performing the low-voltage distribution network topology connection verification, the voltage curves of n load nodes within a preset time period are first obtained as the voltage sample space, and then the correlation and distance between the voltage curves of different load nodes are determined based on the voltage sample space. Then, the correlation between different load nodes is determined based on the correlation and distance between the voltage curves of different load nodes. Finally, based on the correlation between different load nodes, it is determined whether different load nodes belong to the same feeder, and the feeder verification is completed.

[0071] In this embodiment, by obtaining a voltage sample space, the voltage sample space includes voltage curves of n load nodes within a preset time period, thereby determining the correlation and distance between the voltage curves of different load nodes, and then determining the correlation between different load nodes based on the correlation and distance between the voltage curves of different load nodes. Finally, based on the correlation, it is determined whether different load nodes belong to the same feeder, and the feeder verification is completed. In this way, by comprehensively measuring the correlation and distance between the voltage curves of different load nodes, the correlation between different load nodes is determined, avoiding the problem of incorrect correlation judgment between different load nodes caused by ignoring the distance between the voltage curves of different load nodes. The voltage sample space can accurately complete the verification of the low-voltage distribution network topology connection without a specific distribution form, and has the advantages of simple method and wide application range. At the same time, the accuracy of the distribution network topology connection verification is improved.

[0072] Example 2

[0073] Figure 3 This is a flow chart of a low-voltage distribution network topology connection verification method provided by the second embodiment of the present invention. Based on the above embodiment, this embodiment further adds the steps of how to determine the correlation and distance between the voltage curves of different load nodes, and the step of determining the correlation between different load nodes according to the correlation formula. Figure 3 As shown, the verification method specifically includes:

[0074] S210: Acquire a voltage sample space.

[0075] In an optional embodiment, the preset time period includes s time sections, and the voltage sample space can be expressed in matrix form as follows:

[0076]

[0077] For example, taking the low-voltage distribution network including four load nodes and the preset time period including four time sections as an example, the voltage sample space can be expressed in matrix form as follows:

[0078]

[0079] In another optional embodiment, the voltage sample space can also be expressed in the form of a data sequence as:

[0080] U i =(U i (1),U i (2),…,U i (s));

[0081] Among them, i=1,..,n,U i (1)=U 1,t1 , U i (s)=U 1,ts . For example, continuing to take the low-voltage distribution network including 4 load nodes and the preset time period including 4 time sections as an example, the voltage sample space can be represented in the form of a data sequence: U1=U1(1), U1(2), U1(3), U1(4)), U2=U2(1), U2(2), U2(3), U2(4)), U3=U3(1), U3(2), U3(3), U3(4)), U4=U4(1), U4(2), U4(3), U4(4)).

[0082] It should be noted that this embodiment only takes the low-voltage distribution network including 4 load nodes and the preset time period including 4 time sections as an example for explanation. In fact, this embodiment does not specifically limit the number of load nodes in the low-voltage distribution network and the number of time sections included in the preset time period.

[0083] S220 . Determine the correlation between the voltage curves of different load nodes according to a correlation formula between the voltage curves of different load nodes.

[0084] Among them, the correlation formula satisfies:

[0085]

[0086] Where i≠j, j=1,..,n; Δ min U i (w)-U j The minimum value of (w)|, Δ max U i (w)-U j(w)|, w = 1, .., s; σ is the first coefficient value, which can be a coefficient value set according to actual conditions, and its value can be 0 < σ < 1. For example, the value of σ can be 0.5. In an exemplary embodiment, continuing to take the low-voltage distribution network including 4 load nodes and the preset time period including 4 time sections as an example, the correlation between the second load node and the third load node is:

[0087]

[0088] Among them, Δ min is the minimum value of |U2(w)-U3(w)|, Δ max is the maximum value of |U2(w)-U3(w)|, w=1,..,s.

[0089] S230 . Determine the distance between the voltage curves of different load nodes according to a distance formula between the voltage curves of different load nodes.

[0090] Among them, the distance formula satisfies:

[0091]

[0092] Wherein, i≠j, j=1,...,n. In an exemplary embodiment, continuing to take the low-voltage distribution network including 4 load nodes and the preset time period including 4 time sections as an example, the distance between the second load node and the third load node is:

[0093]

[0094] S240. Determine the correlation between different load nodes according to the correlation formula.

[0095] Among them, the correlation formula satisfies:

[0096] ξ ij =ρ1δ ij +ρ2(1-γ ij );

[0097] Wherein, ρ1 is the first weight coefficient, ρ2 is the second weight coefficient, and ρ1+ρ2=1. The first weight coefficient and the second weight coefficient can be set according to actual needs, and the first weight coefficient ρ1 and the second weight coefficient ρ2 need to satisfy ρ1+ρ2=1.

[0098] In an exemplary embodiment, the low-voltage distribution network includes four load nodes, the preset time period includes four time sections, and the values ​​of ρ1 and ρ2 are both 0.5. The correlation between the second load node and the third load node is:

[0099] ξ23 =0.5δ 23 +0.5(1-γ 23 ).

[0100] S250: Determine whether different load nodes belong to the same feeder based on the correlation, and complete the feeder verification.

[0101] In an optional embodiment, if the correlation between different load nodes is greater than or equal to a preset correlation value, it is determined that the different load nodes belong to the same feeder; if the correlation between different load nodes is less than the preset correlation value, it is determined that the different load nodes do not belong to the same feeder.

[0102] Among them, the preset correlation coefficient can be a correlation coefficient value predetermined according to actual needs. When the correlation between different load nodes is greater than or equal to the preset correlation coefficient value, the different load nodes belong to the same feeder. When the correlation between different load nodes is less than the preset correlation coefficient value, the different load nodes do not belong to the same feeder.

[0103] Specifically, when performing a low-voltage distribution network topology connection check, first obtain the voltage curves of n load nodes within a preset time period as a voltage sample space, and then determine the correlation and distance between the voltage curves of different load nodes based on the voltage sample space, where the correlation can be determined by a correlation formula, and the distance can be determined by a distance formula. Then, based on the correlation and distance between the voltage curves of different load nodes, determine the correlation between different load nodes, where the correlation can be determined by a correlation formula. Finally, based on the correlation between different load nodes, determine whether different load nodes belong to the same feeder, and complete the feeder check.

[0104] In this embodiment, by obtaining a voltage sample space, the voltage sample space includes voltage curves of n load nodes within a preset time period, thereby determining the correlation between the voltage curves of different load nodes according to the correlation formula between the voltage curves of different load nodes, and determining the distance between the voltage curves of different load nodes according to the distance formula between the voltage curves of different load nodes; then, according to the correlation formula between different load nodes, the correlation between different load nodes is determined, and finally, based on the correlation, it is determined whether different load nodes belong to the same feeder to complete the feeder verification. In this way, the correlation and distance between the voltage curves of different load nodes are comprehensively measured by the formula to determine the correlation between different load nodes, thereby avoiding the problem of incorrect correlation judgment between different load nodes caused by ignoring the distance between the voltage curves of different load nodes. The voltage sample space can accurately complete the verification of the low-voltage distribution network topology connection without a specific distribution form, and has the advantages of a simple calculation method and a wide range of applications. At the same time, the accuracy of the distribution network topology connection verification is improved.

[0105] Example 3

[0106] Figure 4 This is a flowchart of a low-voltage distribution network topology connection verification method provided in the third embodiment of the present invention. In this embodiment, the low-voltage distribution network also includes a transformer. The low-voltage distribution network topology connection verification method provided in this embodiment further adds a step of performing data preprocessing before obtaining the voltage sample space, and a step of performing distribution verification and correcting the low-voltage distribution network topology connection after completing the feeder verification. Figure 4 As shown, the verification method specifically includes:

[0107] S310 , performing data preprocessing on the voltage measurement values ​​of each load node, and removing and / or correcting erroneous data.

[0108] Among them, the voltage measurement value of each load node can be the voltage value measured by the measuring device such as the electric meter of each load node of the low-voltage distribution network. The voltage measurement value of each load node may contain abnormal data or the measuring device of a certain load node may not measure the voltage value due to damage or other reasons. In this case, the voltage measurement value data is erroneous data. Therefore, it is necessary to eliminate and / or correct the erroneous data to ensure that the voltage values ​​of each load node in the obtained voltage sample space are all valid values.

[0109] S320: Acquire voltage sample space.

[0110] The voltage sample space includes voltage curves of n load nodes within a preset time period.

[0111] S330 : Determine the correlation and distance between voltage curves of different load nodes according to the voltage sample space.

[0112] S340 : Determine the correlation between different load nodes based on the correlation degree and distance between the voltage curves of different load nodes.

[0113] S350: Determine whether different load nodes belong to the same feeder based on the correlation, and complete the feeder verification.

[0114] S360. Determine the distribution position of the load node relative to the transformer on the feeder to which it belongs based on the amplitude of the voltage curve of each load node, and complete the distribution verification.

[0115] The amplitude of the voltage curves of different load nodes may be the maximum amplitude of the voltage curves of different load nodes. It should be noted that, in this embodiment, there is no reactive compensation under each feeder of the low-voltage distribution network. Therefore, the voltage amplitude of each load node on each feeder decreases as it moves away from the transformer. That is, on the same feeder, the voltage amplitude of the load node closer to the transformer is larger, and the voltage amplitude of the load node farther away from the transformer is smaller. Therefore, based on the magnitude relationship of the voltage curve amplitudes of different load nodes, the distribution position of each load node on the feeder to which it belongs relative to the transformer can be determined, thereby completing the distribution verification.

[0116] Specifically, after determining whether different load nodes belong to the same feeder based on the correlation between different load nodes, the distribution position of each load node on the feeder relative to the transformer is determined by comparing the amplitude of the voltage curve of each load node on the same feeder. The load node with a smaller voltage curve amplitude is closer to the transformer distribution, and the load node with a larger voltage curve amplitude is further away from the transformer distribution. In this way, the distribution verification can be completed.

[0117] S370. Correct the low-voltage distribution network topology connection according to the feeder verification structure and the distribution verification structure.

[0118] Specifically, if the current low-voltage distribution network topology structure is the same as the structure of the feeder verification and the structure of the distribution verification obtained by the verification method provided by this embodiment, it means that the current low-voltage distribution network topology structure is connected correctly and no adjustment or correction is required; if the current low-voltage distribution network topology structure is different from the structure of the feeder verification and the structure of the distribution verification obtained by the verification method provided by this embodiment, it means that there is an error in the current low-voltage distribution network topology structure connection, and the current low-voltage distribution network topology structure connection needs to be corrected according to the structure of the feeder verification and the structure of the distribution verification, so that the dispatching personnel can grasp the topological relationship in time and improve the accuracy and efficiency of the energy management and control of the distribution system.

[0119] In this embodiment, by performing data preprocessing on the voltage measurement values ​​of each load node before obtaining the voltage sample space, eliminating and / or correcting erroneous data, it is ensured that the voltage values ​​of each load node in the obtained voltage sample space are all valid values, thereby improving the accuracy of the distribution network topology connection verification; after completing the feeder verification, the distribution position of the load node on the feeder relative to the transformer is determined according to the amplitude of the voltage curve of different load nodes to complete the distribution verification, thereby correcting the low-voltage distribution network topology connection according to the structure of the feeder verification and the structure of the distribution verification, which has the advantages of a simple calculation method and a wide range of applications, and at the same time, improves the accuracy of the distribution network topology connection verification.

[0120] Example 4

[0121] This embodiment provides a low-voltage distribution network topology connection verification device, which can be implemented in the form of hardware and / or software and can be integrated into a verification device. Figure 5 A schematic diagram of a low-voltage distribution network topology connection verification device provided in the fourth embodiment of the present invention is shown in FIG. Figure 5 As shown, the verification device includes:

[0122] The acquisition module 410 is configured to acquire a voltage sample space; the voltage sample space includes voltage curves of n load nodes within a preset time period.

[0123] The correlation and distance determination module 420 is configured to determine the correlation and distance between voltage curves of different load nodes according to the voltage sample space.

[0124] The correlation determination module 430 is configured to determine the correlation between different load nodes based on the correlation degree and distance between the voltage curves of different load nodes.

[0125] The feeder verification module 440 is used to determine whether different load nodes belong to the same feeder based on the correlation, and complete the feeder verification.

[0126] The low-voltage distribution network topology structure connection verification device provided in an embodiment of the present invention can execute the low-voltage distribution network topology structure connection verification method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method. The similarities can be referred to the above description.

[0127] Example 5

[0128] An embodiment of the present invention provides a verification device, including one or more processors; a storage device for storing one or more programs; when the one or more programs are executed by one or more processors, the one or more processors implement the low-voltage distribution network topology connection verification method provided by any embodiment of the present invention.

[0129] The verification device has the corresponding structure and characteristics of executing the low-voltage distribution network topology connection verification method provided by any embodiment of the present invention, and can achieve the beneficial effects of the low-voltage distribution network topology connection verification method provided by the embodiment of the present invention. The similarities can be referred to the above description.

[0130] Example 6

[0131] Based on the same concept, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer instructions. The computer instructions are used to enable a processor to implement the verification method provided by any of the above embodiments when executed.

[0132] In the context of the present invention, computer-readable storage media can be tangible media that can contain or store a computer program for use with an instruction execution system, device or equipment or used in combination with an instruction execution system, device or equipment. Computer-readable storage media can include but are not limited to electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, computer-readable storage media can be machine-readable signal media. More specific examples of machine-readable storage media can include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0133] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A low voltage distribution network topology connection verification method, characterized in that: The low-voltage distribution network includes n load nodes and their associated feeders; the topology connection verification method includes: Acquire a voltage sample space; the voltage sample space includes voltage curves of n load nodes within a preset time period; Determining, based on the voltage sample space, the correlation and distance between the voltage curves of different load nodes; Determining the correlation between the different load nodes according to the correlation degree and distance between the voltage curves of the different load nodes; Determine whether different load nodes belong to the same feeder based on the correlation, and complete feeder verification; The preset time period includes s time sections; the voltage sample space is expressed in matrix form as follows: Or expressed as a data sequence: IN i =(U i (1),U i (2),…,U i (with)); where \(i = 1,\ldots,n\), \(U i (1)=U 1,t1 , U i (s)=U 1,ts ; Determining the correlation and distance between the voltage curves of different load nodes according to the voltage sample space includes: Determining the correlation between the voltage curves of different load nodes according to a correlation formula between the voltage curves of different load nodes; Determine the distance between the voltage curves of different load nodes according to a distance formula between voltage curves of different load nodes; The correlation formula satisfies: Where i≠j, j=1,..,n; Δ m in is |U i (w)-U j The minimum value of (w)|, Δ m ax is |U i (w)-U j The maximum value of (w)|, w=1,..,s; σ is the first coefficient value; The distance formula satisfies: The determining the correlation between the different load nodes according to the correlation degree and distance between the voltage curves of the different load nodes includes: Determine the correlation between the different load nodes according to a correlation formula; The correlation formula satisfies: x ij =ρ1δ ij +ρ2(1-γ ij ); Wherein, ρ1 is the first weight coefficient, ρ2 is the second weight coefficient, and ρ1+ρ2=1.

2. The low-voltage distribution network topology connection verification method according to claim 1, characterized in that: Determining whether different load nodes belong to the same feeder according to the correlation includes: If the correlation between the different load nodes is greater than or equal to a preset correlation value, it is determined that the different load nodes belong to the same feeder; If the correlation between the different load nodes is less than the preset correlation value, it is determined that the different load nodes do not belong to the same feeder.

3. The low-voltage distribution network topology connection verification method according to claim 1, characterized in that: The low-voltage distribution network further includes a transformer; After the feeder verification is completed, it is determined based on the correlation whether different load nodes belong to the same feeder, and further includes: According to the amplitudes of the voltage curves of the different load nodes, the distribution positions of the load nodes on the feeder lines to which they belong relative to the transformer are determined, thereby completing the distribution verification.

4. The low-voltage distribution network topology connection verification method according to claim 3, characterized in that: After completing the distribution verification, it also includes: According to the structure of the feeder verification and the structure of the distribution verification, the low-voltage distribution network topology connection is corrected.

5. The low-voltage distribution network topology connection verification method according to claim 1, characterized in that: Before acquiring the voltage sample space, the method further includes: Data preprocessing is performed on the voltage measurement values ​​of each load node to eliminate and / or correct erroneous data.

6. A low-voltage distribution network topology connection verification device, characterized in that: include: An acquisition module is used to acquire a voltage sample space; the voltage sample space includes voltage curves of n load nodes within a preset time period; A correlation and distance determination module, configured to determine the correlation and distance between the voltage curves of different load nodes based on the voltage sample space; a correlation determination module, configured to determine the correlation between the different load nodes based on the correlation degree and distance between the voltage curves of the different load nodes; A feeder verification module, configured to determine whether different load nodes belong to the same feeder based on the correlation, and complete feeder verification; The preset time period includes s time sections; the voltage sample space is expressed in matrix form as follows: Or expressed as a data sequence: IN i =(U i (1),U i (2),…,U i (with)); where \(i = 1,\ldots,n\), \(U i (1)=U 1,t1 , \(U i (s)=U 1,ts ;\ The correlation and distance determination module is further configured to determine the correlation between the voltage curves of different load nodes according to a correlation formula between the voltage curves of different load nodes; and determine the distance between the voltage curves of different load nodes according to a distance formula between the voltage curves of different load nodes; the correlation formula satisfies: Where i≠j, j=1,..,n; Δ m in is |U i (w)-U j The minimum value of (w)|, Δ m ax is |U i (w)-U j The maximum value of (w)|, w=1,..,s; σ is the first coefficient value; The distance formula satisfies: The correlation determination module is further configured to determine the correlation between the different load nodes according to a correlation formula; The correlation formula satisfies: x ij =ρ1δ ij +ρ2(1-γ ij ); Wherein, ρ1 is the first weight coefficient, ρ2 is the second weight coefficient, and ρ1+ρ2=1.

7. A calibration device, characterized in that: The verification device comprises: one or more processors; a storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the low-voltage distribution network topology connection verification method according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the low-voltage distribution network topology connection verification method according to any one of claims 1 to 5 is implemented.

Images