10KV power cable load current measuring device, system and method

Abstract

The invention discloses a 10KV power cable load current measuring device, system and method, and relates to the technical field of power system monitoring, and the device comprises three phases which are used for transmitting electric energy; the measuring assembly comprises a current transformer and a voltage transformer; wherein the current transformer is used for detecting the current of the three phases, and the voltage transformer is used for detecting the voltage of the three phases; the installation assembly comprises a meter box used for installing the current transformer and the voltage transformer, and the meter box is provided with at least 11 wiring ports; and the transmission assembly is used for transmitting the three-phase current data and the three-phase voltage data in real time. Automatic monitoring is carried out through an automatic system, power distribution operation and maintenance personnel do not need to arrive at the site for patrol, temperature measurement, analysis, cable operation condition judgment and the like, so that the safety risk of operation of the power distribution operation and maintenance personnel is reduced, the system can monitor the cable load in real time, rapidly respond and give an alarm under abnormal conditions, and continuity and reliability of power supply are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of power system monitoring, and in particular to a 10KV power cable load current measuring device, system and method. Background Art

[0002] The load of 10KV distribution network cable lines changes greatly in winter or during peak hours, which may cause the cable power supply lines to be burned by high current. The traditional monitoring method requires distribution operation and maintenance personnel to open the cable cover plate, apply for work tickets, open the cabinet door, etc. on site, and use a far-infrared thermometer to measure the cable temperature to determine the cable load condition, but cannot intuitively measure the load current of each phase of the cable. This method increases the workload of power supply station inspections, increases the safety risks of operators, and increases the frequency of vehicle travel and production costs. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the above-mentioned problem that it is difficult to measure the load current of the existing 10KV power cable, the present invention is proposed.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: a 10KV power cable load current measuring device, comprising three phases for transmitting electric energy; a measuring component, comprising a current transformer and a voltage transformer; wherein the current transformer is used to detect the current of the three phases, and the voltage transformer is used to detect the voltage of the three phases; an installation component, comprising a meter box for installing the current transformer and the voltage transformer, and the meter box has at least 11 wiring ports; and a transmission component for transmitting the current data and voltage data of the three phases in real time.

[0006] As a preferred solution of the 10KV power cable load current measuring device of the present invention, each of the three phase lines of the three phases is connected with at least one current transformer.

[0007] As a preferred solution of the 10KV power cable load current measuring device of the present invention, wherein: the voltage transformer is connected to any two phase lines of the three-phase and can detect the voltage between the two phase lines.

[0008] As a preferred solution of the 10KV power cable load current measuring device of the present invention, wherein: the transmission component at least includes a transmission module for transmitting data, and a mobile terminal for receiving data.

[0009] As a preferred solution of the 10KV power cable load current measuring device of the present invention, wherein: the transmission component adopts wireless transmission based on satellite communication.

[0010] As a preferred solution of the 10KV power cable load current measuring device of the present invention, it also includes a protection component, which includes a grounding angle stake, a grounding flat iron arranged on the grounding angle stake, and an insulated grounding wire with one end connected to the grounding flat iron.

[0011] As a preferred solution of the 10KV power cable load current measuring device of the present invention, the protection component also includes a lightning arrester for protecting the device from lightning strikes and overvoltage damage.

[0012] To solve the above technical problems, the present invention also provides the following technical solutions: a load current measurement system, based on the 10KV power cable load current measurement device, comprising a central controller; and, an acquisition module, used to collect three-phase current data and voltage data; a conversion module, used to digitally convert the collected data; a storage module, used to store the digitized data; a transmission module, used to transmit the digitized data to a mobile terminal, and can display it in real time in the form of a chart.

[0013] As a preferred solution of the load current measurement system of the present invention, it also includes an analysis module for performing statistical analysis on the data to optimize the allocation and use of power resources.

[0014] In order to solve the above technical problems, the present invention also provides the following technical solutions: a load current measurement method, which specifically includes the following steps;

[0015] S100: Check that the current transformer and voltage transformer in the meter box are in good condition and ensure that the current transformer in the meter box is connected to the insulated grounding wire;

[0016] S300: re-enter the terminal AP address of the load current measuring device into the system;

[0017] S400: Connect the three phases to the current transformer and the voltage transformer;

[0018] S500: Real-time monitoring of the load cables of three-phase cables through current transformers and voltage transformers.

[0019] The beneficial effects of the present invention are as follows: through automatic monitoring by the automation system, there is no need for distribution operation and maintenance personnel to arrive at the site for inspection, temperature measurement, analysis, and judgment of cable operation conditions, etc., thereby reducing the safety risks of distribution operation and maintenance personnel's operations. The system can monitor the cable load in real time, and respond quickly and issue an alarm in abnormal situations, ensuring the continuity and reliability of power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0021] Figure 1 This is the wiring diagram of the 10KV power cable load current measuring device of the present invention.

[0022] Figure 2 This is a system module diagram of the load current measurement system described in the present invention.

[0023] In the figure: 100, three-phase; 300, installation component; 301, meter box; 302, wiring port; 400, protection component; 401, grounding angle stake; 402, grounding flat iron; 403, insulated grounding wire; 500, central controller; 501, acquisition module; 502, conversion module; 503, storage module; 504, transmission module; 505, analysis module. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0027] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0028] Example 1

[0029] Reference Figure 1, which is the first embodiment of the present invention, provides a 10KV power cable load current measuring device for monitoring the load current of the 10KV power cable, including three-phase 100 for transmitting electric energy, and a measuring component for detecting the current and voltage of the three-phase 100.

[0030] Specifically, the three-phase 100 has phase A, phase B and phase C lines, which can transmit electric energy; the three-phase 100 cable is made of copper material, the insulation level is XLPE (cross-linked polyethylene), and it is suitable for 10KV voltage level. The measurement components include current transformers and voltage transformers. The current transformer is a 10KV open-type high-precision LMZK-10-32 primary current transformer, and its window size is selected according to the cable cross-section to ensure at least 95% current measurement accuracy; the voltage transformer is a sheep horn voltage transformer, model JDZW-10 outdoor 400VH-10 / 0.22KV, with an accuracy level of 0.5.

[0031] The current transformer is used to detect the current of the three-phase 100 , and the voltage transformer is used to detect the voltage of the three-phase 100 .

[0032] As a further improvement, each of the three phase lines of the three-phase 100 is connected to at least one current transformer.

[0033] As a further improvement, the voltage transformer is connected to any two phase lines of the three-phase 100 and can detect the voltage between the two phase lines.

[0034] As a further improvement, the device further includes an installation component 300 for installing the current transformer and the voltage transformer. Specifically, the installation component 300 includes a meter box 301, which is a stainless steel meter box 301 with corrosion resistance and drop resistance. The meter box 301 has a storage space inside to ensure the accurate installation of the transformer and the terminal block. The meter box 301 has at least 11 wiring ports 302; Figure 1 As shown, interfaces 1-3, 4-6, and 7-9 are each connected to a current transformer, and the remaining interfaces are used for voltage transformers and other control circuits.

[0035] As a further improvement, the device further includes a transmission component for real-time transmission of current data and voltage data of the three-phase 100. Specifically, the transmission component at least includes a transmission module 504 for transmitting data, and a mobile terminal for receiving data. The transmission component adopts wireless transmission based on satellite communication.

[0036] Specifically, the transmission module 504 adopts wireless transmission based on satellite communication, and the mobile terminal has 4G / 5G network and Wi-Fi connection capabilities, and can receive and process data from the transmission module 504.

[0037] As a further improvement, the device also includes a protection component 400, which is used to prevent lightning and leakage, and protect the safety of electrical equipment and personal safety. Specifically, the protection component 400 includes a grounding angle stake 401, a grounding flat iron 402 arranged on the grounding angle stake 401, and an insulated grounding wire 403 connected to the grounding flat iron 402 at one end. When the equipment leaks electricity, the current is introduced into the insulated grounding wire 403 through the metal shell of the equipment, and one end of the insulated grounding wire 403 is connected to the grounding flat iron 402 embedded in the grounding angle stake 401, thereby introducing the current into the ground, which plays a role in preventing leakage.

[0038] Specifically, the protection component 400 also includes a lightning arrester, which is installed on the meter box 301 and is used to protect the device from lightning strikes and overvoltage damage.

[0039] Example 2

[0040] Reference Figure 2 , which is the second embodiment of the present invention, provides a load current measurement system. The system is based on the 10KV power cable load current measurement device described in Example 1, and includes a central controller 500; and

[0041] The acquisition module 501 is used to acquire the current data and voltage data of the three-phase 100. The acquisition module 501 at least includes a current transformer for acquiring the current data of the three-phase 100 and a voltage transformer for acquiring the voltage data of the three-phase 100.

[0042] The conversion module 502 includes at least one digital converter for digitally converting the collected data.

[0043] The storage module 503 includes at least one storage chip for storing digitized data.

[0044] The transmission module 504 includes at least one IoT card, which is used to transmit digital data to the mobile terminal and can be displayed in real time in the form of a chart. The IoT card supports 4G / 5G full network access, has a fast data transmission rate, and a wide coverage range, ensuring the stability of data transmission.

[0045] The analysis module 505 is used to perform statistical analysis on the data to optimize the allocation and use of power resources, use machine learning algorithms to analyze load data, and provide load forecasting, fault diagnosis and optimization suggestions.

[0046] Example 3

[0047] As a third embodiment of the present invention, a load current measurement method is provided, which specifically includes the following steps:

[0048] S100: Check that the current transformer and the voltage transformer in the meter box 301 are intact, and ensure that the current transformer in the meter box 301 is connected to the insulated grounding wire 403 .

[0049] S300: Re-enter the terminal AP address of the load current measuring device into the system.

[0050] S400: Connect the three phases 100 to the current transformer and the voltage transformer.

[0051] S500: Real-time monitoring of the load cable of the three-phase 100 cable is carried out through current transformers and voltage transformers; the data acquisition cycle is 1 second, the processing cycle is 2 seconds, and the display cycle is 3 seconds to ensure the real-time nature of the data. For abnormal situations, the system can respond and issue an alarm within 5 seconds.

[0052] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0053] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0054] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A 10KV power cable load current measuring device, characterized in that: include, Three-phase (100), used to transmit electrical energy; A measuring component, comprising a current transformer and a voltage transformer; wherein the current transformer is used to detect the current of the three phases (100), and the voltage transformer is used to detect the voltage of the three phases (100); An installation assembly (300), comprising a meter box (301) for installing the current transformer and the voltage transformer, wherein the meter box (301) has at least 11 connection ports (302); and A transmission component is used for transmitting three-phase (100) current data and voltage data in real time.

2. The 10KV power cable load current measuring device according to claim 1, characterized in that: Each of the three phase lines of the three-phase (100) is connected to at least one current transformer.

3. The 10KV power cable load current measuring device according to claim 2, characterized in that: The voltage transformer is connected to any two phase lines of the three-phase (100) and is capable of detecting the voltage between the two phase lines.

4. The 10KV power cable load current measuring device according to claim 3, characterized in that: The transmission component at least includes a transmission module (504) for transmitting data and a mobile terminal for receiving data.

5. The 10KV power cable load current measuring device according to claim 4, characterized in that: The transmission component adopts wireless transmission based on satellite communication.

6. The 10KV power cable load current measuring device according to claim 5, characterized in that: Also includes, A protection assembly (400) comprises a grounding angle stake (401), a grounding flat iron (402) arranged on the grounding angle stake (401), and an insulating grounding wire (403) one end of which is connected to the grounding flat iron (402).

7. The 10KV power cable load current measuring device according to claim 6, characterized in that: The protection component (400) also includes a lightning arrester for protecting the device from lightning strikes and overvoltage damage.

8. A load current measurement system based on the 10KV power cable load current measurement device according to any one of claims 1 to 7, characterized in that: comprising a central controller (500); and, A collection module (501), used for collecting current data and voltage data of three phases (100); A conversion module (502), used for digitally converting the collected data; A storage module (503), used for storing digitized data; The transmission module (504) is used to transmit the digitized data to the mobile terminal, and can display it in real time in the form of a chart.

9. The load current measurement system according to claim 8, characterized in that: Also includes, The analysis module (505) is used to perform statistical analysis on the data to optimize the allocation and use of power resources.

10. A load current measurement method, characterized in that: The specific steps include: S100: Check that the current transformer and the voltage transformer in the meter box (301) are intact, and ensure that the current transformer in the meter box (301) is connected to the insulated grounding wire (403); S300: re-enter the terminal AP address of the load current measuring device into the system; S400: Connect the three phases (100) to the current transformer and the voltage transformer; S500: Real-time monitoring of the load cables of the three-phase (100) cable through current transformers and voltage transformers.

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