High-efficiency identification instrument and method for low-voltage branch lines in substations based on synchronous current comparison method

Abstract

The present invention discloses an efficient identification instrument and method for low-voltage branch lines in a substation based on a synchronous current comparison method, comprising: an energy consumption end connected to one end of a cable to be identified and used to regularly draw electricity from the cable; a detection end connected to the other end of the cable to be identified and used to collect current signals; a controller connected to the detection end and used to determine whether the two ends of the cable belong to the same cable based on the collected current signals. The present invention utilizes the principle that the current in the cable changes when the device consumes power, so that the energy consumption end regularly draws power from the cable, and detects through the detection end. When the regularity of the current signal and the energy consumption is the same, it can be determined to be the same cable. Therefore, the recognition speed can be greatly improved and the work efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the field of cable maintenance, and in particular to an efficient identification instrument and method for low-voltage branch lines in a substation based on a synchronous current comparison method. Background Art

[0002] Unlike overhead high-voltage lines, cables are often laid in cable trenches, tunnels, pipelines or indoors. After entering modern society, due to the shortage of urban land, heavy traffic pressure, and urban appearance construction, large cities generally use underground cables for power transmission. Compared with overhead lines, cables have the advantages of small footprint, reliable power transmission, and strong anti-interference ability.

[0003] In some cases, due to the lack or error of switch identification, it is impossible to determine which switch carries which electrical device, i.e. the cables are crossed and chaotic and need to be identified. If the cables are sorted one by one, it will take a lot of time and be inefficient. Currently, there is a lack of suitable identification methods. Summary of the invention

[0004] In view of the problem that the existing technology cannot identify the unmarked buried cables that are crossed and chaotic, the present invention provides an efficient identification instrument and method for low-voltage branch lines in substations based on the synchronous current comparison method. By inputting current at one end of the cable and detecting at the other end, it is determined whether it is the same cable based on the detected fluctuation value, and finally the head and tail matching of the cable is completed.

[0005] The following is the technical solution of the present invention.

[0006] The high-efficiency identification instrument for low-voltage branch lines in the substation area based on the synchronous current comparison method includes:

[0007] The energy consumption end is connected to one end of the cable to be identified and is used to regularly draw power from the cable;

[0008] The detection end is connected to the other end of the cable to be identified and is used to collect current signals;

[0009] The controller is connected to the detection end and is used to determine whether the two ends of the cable belong to the same cable according to the collected current signal.

[0010] The present invention uses the principle that the current in the cable changes when the device consumes power, so that the energy consumption end regularly draws power from the cable, and detects through the detection end. When the regularity of the current signal and the energy consumption are the same, it can be determined that they are the same cable. Therefore, the recognition speed can be greatly improved, and the work efficiency can be improved.

[0011] Preferably, the energy consumption end includes a piercing wire clamp, an automatic phase-changing switch and a single-phase electric heating furnace, the piercing wire clamp is used to draw electricity from the cable, the automatic phase-changing switch is used to connect ABC phases in sequence, and the single-phase electric heating furnace is used to consume electricity at a constant power.

[0012] Preferably, the detection end comprises an open-type current transformer, which is sleeved outside the cable to be identified and is used to sense the current in the cable.

[0013] The present invention also provides an efficient identification method for low-voltage branch lines in a transformer area based on a synchronous current comparison method, which is used for the above-mentioned identification instrument and includes the following steps:

[0014] Use the energy-consuming end to connect one end of the cable to be identified, and connect the ABC phases in sequence to consume electricity at a constant power;

[0015] Use the detection end to connect the other end of the cable to be identified to detect the current in the cable;

[0016] The controller is used to determine whether the two ends of the cable belong to the same cable according to the collected current signal.

[0017] Preferably, the determination of whether the two ends of the cable belong to the same cable includes: if the fluctuation values ​​of the three-phase currents ABC are equal to the rated current of the energy-consuming end in sequence, then it is determined that the two ends are the same cable; if not, then they are not the same cable.

[0018] Preferably, the ABC phases are connected in sequence, with an interval of one second between each connection.

[0019] Preferably, the rated current is 10A.

[0020] The substantial effects of the present invention include: by regularly drawing power from the cables and detecting from the other end, it is possible to determine whether the cables are the same based on the regularity of the current signal, thereby greatly improving the recognition speed of the chaotically crossed and unmarked buried cables and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of an embodiment of the present invention;

[0022] The figure includes: 1-energy consumption end, 2-detection end, 3-controller. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution will be clearly and completely described below in combination with the embodiments. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0024] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein.

[0025] It should be understood that in various embodiments of the present invention, the size of the sequence number of each process does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0026] It should be understood that in the present invention, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0027] It should be understood that in the present invention, "plurality" refers to two or more than two. "And / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "Contains A, B and C", "Contains A, B, C" means that A, B, and C are all included, "Contains A, B or C" means that one of A, B, and C is included, and "Contains A, B and / or C" means that any one, any two, or any three of A, B, and C are included.

[0028] It should be understood that in the present invention, "B corresponding to A", "B corresponding to A", "A corresponds to B" or "B corresponds to A" means that B is associated with A and B can be determined based on A. Determining B based on A does not mean determining B based only on A, but B can also be determined based on A and / or other information. A and B match when the similarity between A and B is greater than or equal to a preset threshold.

[0029] Depending on the context, "if" as used herein may be interpreted as "when" or "when" or "in response to determining" or "in response to detecting."

[0030] The technical solution of the present invention is described in detail with specific embodiments below. The embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0031] Example:

[0032] like Figure 1 As shown in the figure, it is a high-efficiency identification instrument for low-voltage branch lines in the substation area based on the synchronous current comparison method, including:

[0033] Energy consumption end 1, connected to one end of the cable to be identified, used to regularly draw power from the cable;

[0034] Detection terminal 2, connected to the other end of the cable to be identified, for collecting current signals;

[0035] The controller 3 is connected to the detection end and is used to determine whether the two ends of the cable belong to the same cable according to the collected current signal.

[0036] Among them, the energy consumption end includes a piercing wire clamp, an automatic phase-changing switch and a single-phase electric heating furnace. The piercing wire clamp is used to draw electricity from the cable, the automatic phase-changing switch is used to connect ABC phases in sequence, and the single-phase electric heating furnace is used to consume electricity at a constant power.

[0037] The detection end comprises an open-type current transformer, which is sleeved outside the cable to be identified and is used to sense the current in the cable.

[0038] The working process of this embodiment includes:

[0039] Use the energy consumption end to connect one end of the cable to be identified, and connect the ABC phases in sequence every 1 second, consuming electricity at a constant power, where the constant working current of the electric heating furnace is 10A;

[0040] Use the detection end to connect the other end of the cable to be identified to detect the current in the cable;

[0041] The controller is used to determine whether the two ends of the cable belong to the same cable according to the collected current signal.

[0042] When the present embodiment is used for identification, the ABC phases are connected in sequence, so that the 10A current consumed by the electric heating furnace comes from the ABC phases in sequence. Once the command is given, three rounds of connection will be cycled. The liquid crystal display of the identification instrument automatically displays the fluctuation value of the ABC three-phase current. If the fluctuation value of the ABC three-phase current is 10A every 1 second, it is determined to be the same cable; if the three-phase current fluctuation value displayed by the liquid crystal is not 10A, it is not the same cable.

[0043] This embodiment uses the principle that the current in the cable changes when the device consumes power, so that the energy consumption end regularly draws power from the cable, and detects through the detection end. When the regularity of the current signal and the energy consumption are the same, it can be determined that they are the same cable. Therefore, the recognition speed can be greatly improved, and the work efficiency can be improved.

[0044] Through the description of the above implementation methods, technical personnel in the relevant field can understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the specific device can be divided into different functional modules to complete all or part of the functions described above.

[0045] In the embodiments provided in the present application, it should be understood that the disclosed structures and methods can be implemented in other ways. For example, the embodiments of the structure described above are only schematic. For example, the division of modules or units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another structure, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, structures or units, which can be electrical, mechanical or other forms.

[0046] The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0047] In addition, each functional unit in the embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0048] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium, including several instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0049] The above contents are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An efficient identification instrument for low-voltage branch lines in the substation area based on the synchronous current comparison method, characterized in that: include: The energy consumption end is connected to one end of the cable to be identified and is used to regularly draw power from the cable; The detection end is connected to the other end of the cable to be identified and is used to collect current signals; A controller connected to the detection end, used to determine whether the two ends of the cable belong to the same cable according to the collected current signal; The energy consumption end includes a puncture wire clamp, an automatic phase-changing switch and a single-phase electric heating furnace, wherein the puncture wire clamp is used to draw power from the cable, the automatic phase-changing switch is used to connect the A, B and C phases in sequence, and the single-phase electric heating furnace is used to consume power at a constant power; If the fluctuation values ​​of the three-phase currents ABC are equal to the rated current of the energy consumption end, it is determined that the two ends are the same cable. If not, they are not the same cable.

2. The high-efficiency identification instrument for low-voltage branch lines in substations based on synchronous current comparison method according to claim 1 is characterized in that: The detection end comprises an open-type current transformer, which is sleeved outside the cable to be identified and is used to sense the current in the cable.

3. An efficient identification method for low-voltage branch lines in a transformer area based on a synchronous current comparison method, used in an identification device as claimed in any one of claims 1 to 2, characterized in that: The following steps are involved: Use the energy-consuming end to connect one end of the cable to be identified, and connect the ABC phases in sequence to consume electricity at a constant power; Use the detection end to connect the other end of the cable to be identified to detect the current in the cable; The controller is used to determine whether the two ends of the cable belong to the same cable according to the collected current signal.

4. The method for efficiently identifying low-voltage branch lines in a substation based on the synchronous current comparison method according to claim 3 is characterized in that: The A, B, C phases are connected in sequence, with a one-second interval between each connection.

5. The method for efficiently identifying low-voltage branch lines in a substation based on the synchronous current comparison method according to claim 3 is characterized in that: The rated current is 10A.

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