CN117491901A - Intelligent cable shielding layer leakage current on-line monitoring device - Google Patents
Intelligent cable shielding layer leakage current on-line monitoring device Download PDFInfo
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- CN117491901A CN117491901A CN202311335588.1A CN202311335588A CN117491901A CN 117491901 A CN117491901 A CN 117491901A CN 202311335588 A CN202311335588 A CN 202311335588A CN 117491901 A CN117491901 A CN 117491901A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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Abstract
The application provides an intelligent cable shielding layer leakage current on-line monitoring device, include: the system comprises a detection module, a control module and a monitoring platform; the control module is electrically connected with the detection module and is in wireless communication connection with the monitoring platform; the detection module is used for obtaining a plurality of leakage currents in one period on the intelligent cable shielding layer, calculating to obtain an effective leakage current value, generating a leakage current value signal, and sending the leakage current value signal to the control module; the control module is used for receiving the leakage current value signal and sending the leakage current value signal to the monitoring platform; the monitoring platform is used for receiving the leakage current value signal and displaying the leakage current value. The device realizes monitoring of the leakage current of the cable, effectively transmits information to the hands of operation and maintenance personnel, and enables the operation and maintenance personnel to quickly judge the leakage point so as to maintain and overhaul circuits and equipment in time. The device can monitor leakage current of the cable shielding layer on line in real time, and effectively prevent leakage accidents caused by leakage.
Description
Technical Field
The application relates to the technical field of cable leakage current monitoring, in particular to an intelligent cable shielding layer leakage current on-line monitoring device.
Background
The cable head discharge is a common problem of cables, and cable aging, poor quality, no grooves in underground cables, mechanical damage caused by external force and the like can cause electric leakage.
The electric leakage is the main reason that causes the insulation of power cable to be destroyed, monitors the electric leakage condition on the power cable to effectively analyze it, can in time accurately judge the insulating state of power cable, and can effectively fix a position the fault point when breaking down, can effectively reduce work load and the maintenance cost of outage maintenance, can also avoid the damage of pressurization experiment to the cable insulating layer.
The electric leakage not only consumes electric energy, but also can damage electrical equipment and even cause personal injury. The leakage current of the high-voltage cable is mainly capacitive leakage current, has influence on the insulation, has high requirements on the ground short-circuit protection, and is more important to the leakage monitoring and prevention of the high-voltage cable because the larger the leakage current is, the worse the insulation strength of the cable is or the more serious the local defect is, and the higher the breakdown and damage are caused in the operation.
Disclosure of Invention
This application is for solving above-mentioned high tension cable's leakage current consumption electric energy, damage electrical equipment, causes the problem of personal casualties even, provides an intelligent cable shielding layer leakage current on-line monitoring device, includes: the system comprises a detection module, a control module and a monitoring platform;
the control module is electrically connected with the detection module and is in wireless communication connection with the monitoring platform;
the detection module is used for obtaining a plurality of leakage currents in one period on the intelligent cable shielding layer, calculating to obtain an effective leakage current value, generating a leakage current value signal, and sending the leakage current value signal to the control module;
the control module is used for receiving the leakage current value signal and sending the leakage current value signal to the monitoring platform;
the monitoring platform is used for receiving the leakage current value signal and displaying the leakage current value.
In one possible implementation, the detection module includes a current transformer unit and an electric energy metering unit;
the current transformer unit is electrically connected with the intelligent cable shielding layer and the electric energy metering unit;
the current transformer unit is used for detecting leakage current on the intelligent cable shielding layer, obtaining a leakage current signal and transmitting the leakage current signal to the electric energy metering unit;
the electric energy metering unit is used for receiving the leakage current signal and processing the leakage current signal to obtain a leakage current value;
the electric energy metering unit is also used for converting the leakage current value to obtain the leakage current value signal and sending the leakage current value signal to the control module.
In a possible implementation manner, the control module comprises a signal receiving and transmitting unit, a filtering unit and an antenna unit;
the signal receiving and transmitting unit is used for receiving or transmitting the leakage current value signal;
the filtering unit is used for processing the leakage current value signal;
the antenna unit is used for being in wireless communication connection with the monitoring platform.
In a possible implementation manner, the control module further comprises an antenna switch unit, and the antenna switch unit is used for controlling the connection and disconnection of the wireless communication connection between the antenna unit and the monitoring platform.
In one possible implementation, the system further comprises a download debugging module;
the download debugging module is in communication connection with the control module;
the download debugging module is used for importing and debugging the control program and parameters of the control module.
In one possible implementation, the device further comprises a power supply module;
the power supply module is electrically connected with the detection module and the control module;
the power supply module is used for supplying power to the detection module and the control module;
the control module further comprises a power management unit, wherein the power management unit is used for controlling the switch of the power supply module.
In one possible implementation manner, the current transformer unit is a current transformer, and the material of the current transformer is a nanocrystalline high-conductivity soft magnetic material.
In one possible implementation, the monitoring platform is provided with a display screen, and the display screen is used for displaying and recording the leakage current value.
From the foregoing, the present application provides an online monitoring device for leakage current of a shielding layer of a smart cable, including: the system comprises a detection module, a control module and a monitoring platform; the control module is electrically connected with the detection module and is in wireless communication connection with the monitoring platform; the detection module is used for obtaining a plurality of leakage currents in one period on the intelligent cable shielding layer, calculating to obtain an effective leakage current value, generating a leakage current value signal, and sending the leakage current value signal to the control module; the control module is used for receiving the leakage current value signal and sending the leakage current value signal to the monitoring platform; the monitoring platform is used for receiving the leakage current value signal and displaying the leakage current value. The device realizes monitoring of the leakage current of the cable, effectively transmits information to operation and maintenance personnel, and enables the operation and maintenance personnel to quickly judge the leakage point so as to maintain and overhaul circuits and equipment in time, reduce the fault probability of the circuits and improve the reliability of the circuits; the leakage current of the cable shielding layer can be monitored on line in real time, leakage accidents caused by leakage can be effectively prevented, and personal and property safety can be better protected.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the practice of the invention and together with the description, serve to explain the principles of the embodiments of the invention. It is evident that the drawings in the following description are only some embodiments of the implementation of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of an online monitoring device for leakage current of a shielding layer of a smart cable according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an online monitoring device for leakage current of a shielding layer of a smart cable according to another embodiment of the present application;
fig. 3 is a schematic structural diagram of a detection module provided in an embodiment of the present application;
FIG. 4 is a schematic circuit diagram of a detection module according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a master control module according to an embodiment of the present application;
fig. 6 is a schematic circuit diagram of a master control module according to an embodiment of the present disclosure;
FIG. 7 is a schematic circuit diagram of a download debug module according to an embodiment of the present application;
fig. 8 is a schematic diagram of an add (alternating current to direct current) circuit of a power supply module according to an embodiment of the present application;
fig. 9 is a schematic diagram of a DCDC (direct current to direct current) circuit of a power supply module according to an embodiment of the present application.
Reference numerals illustrate:
100-a detection module; 200-a control module; 300-monitoring a platform; 400-downloading a debugging module; 500-a power supply module; 110-a current transformer unit; 120-an electric energy metering unit; 210-a signal transceiving unit; 220-a filtering unit; 230-an antenna unit; 240-an antenna switching unit; 250-power management unit.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of the implementations of embodiments of the invention.
The cable head discharge is a common problem of cables, and cable aging, poor quality, no grooves in underground cables, mechanical damage caused by external force and the like can cause electric leakage. The electric leakage is the main reason that causes the insulation of power cable to be destroyed, monitors the electric leakage condition on the power cable to effectively analyze it, can in time accurately judge the insulating state of power cable, and can effectively fix a position the fault point when breaking down, can effectively reduce work load and the maintenance cost of outage maintenance, can also avoid the damage of pressurization experiment to the cable insulating layer. The electric leakage not only consumes electric energy, but also can damage electrical equipment and even cause personal injury.
The application provides an intelligent cable shielding layer leakage current on-line monitoring device for solving the above-mentioned problem, and referring to fig. 1, including: the system comprises a detection module 100, a control module 200 and a monitoring platform 300; the control module 200 is electrically connected with the detection module 100, and the control module 200 is in wireless communication connection with the monitoring platform 300.
The detection module 100 is configured to obtain a plurality of leakage currents in a period on the smart cable shielding layer, calculate an effective leakage current value, generate a leakage current value signal, and send the leakage current value signal to the control module 200; the control module 200 is configured to receive the leakage current value signal and send the leakage current value signal to the monitoring platform 300; the monitoring platform 300 is configured to receive the leakage current value signal and display the leakage current value.
According to the intelligent cable shielding layer leakage current on-line monitoring device, the detection module 100 samples and measures a power frequency alternating current signal through an electromagnetic induction principle, wherein the period is an alternating current signal period, real-time current values of a plurality of points are sampled in one alternating current signal period, an effective value is calculated, the measured current values and voltage values are sent to a nearby monitoring platform 300 through wireless signals, the monitoring platform 300 can be a base station or a central platform, and the purpose of real-time on-line monitoring is achieved. The on-line monitoring device can prevent and eliminate personal harm and equipment property loss caused by leakage current of the cable shielding layer.
In some embodiments of the present application, referring to fig. 3, the detection module 100 includes a current transformer unit 110 and an electric energy metering unit 120; the current transformer unit 110 is electrically connected with the intelligent cable shielding layer and the electric energy metering unit 120; the current transformer 110 is used for detecting leakage current on the smart cable shielding layer, obtaining a leakage current signal, and transmitting the leakage current signal to the electric energy metering unit 120.
Specifically, in the embodiment of the present application, the current transformer unit 110 may be an open type current transformer, the circuit is shown in fig. 4, where J2 is a current transformer interface, and the type of the transformer may be JCT24K made of nanocrystalline high-conductivity soft magnetic material, and the transformer made of the ultracrystalline material has higher collection precision, higher strength, stronger impact resistance, and an aperture of 24 mm is adapted to various thick and thin wires.
The electric energy metering unit 120 is configured to receive the leakage current signal, process the leakage current signal to obtain a leakage current value, and convert the leakage current value to obtain a leakage current value signal, and send the leakage current value signal to the control module 200.
Specifically, in the embodiment of the present application, the electric energy metering unit 120 may use an electric energy metering IC chip, and the electric energy metering IC chip uses HLW8112, which is a high-precision electric energy metering IC chip manufactured by using a CMOS process, and a plurality of ADCs and a high-precision electric energy metering core are integrated inside, so that leakage detection can be well realized by matching with a current transformer, and a circuit design can be more flexible by using a dual communication interface of an SPI and a UART.
With continued reference to fig. 4, the current transformer detects the leakage current of the circuit, and then the collected leakage current signal is processed by matching with the electric energy metering IC, so that the current information can be directly read out by the singlechip, the design and development time is greatly shortened, and the simplified circuit is more convenient for debugging and testing.
In some embodiments of the present application, referring to fig. 5, the control module 200 includes a signal transceiving unit 210, a filtering unit 220, and an antenna unit 230; the signal transceiver unit 210 is configured to receive or transmit a leakage current value signal; the filtering unit 220 is used for processing the leakage current value signal; the antenna unit 230 is used for wireless communication connection with the monitoring platform 300.
In this embodiment of the present application, the control module 200 may use EC-01G as a system master control, where the EC-01G module is an internet of things module based on wide area network communication, and may be driven by an AT instruction to implement data transmission and reporting. The module supports network connection modes such as NB, GPS and the like, and the NB-LoT part in the EC-01G can adopt an EC616S with ultra-high integration and ultra-low power consumption as a main chip.
The signal transceiver unit 210, the filter unit 220 and the antenna unit 230 give the device excellent communication performance and stability in various wireless environments, as shown in fig. 6, the control module 200 selects an adaptive antenna and a SIM card, and then wireless communication can be realized through simple configuration, and the added IO port also enables the control module 200 to adapt to more application scenes, so that control over equipment can be realized without more single-chip computers, circuit design is simplified, and manufacturing cost of the equipment is also greatly reduced.
In some embodiments of the present application, with continued reference to fig. 5, the control module 200 further includes an antenna switch unit 240, where the antenna switch unit 240 is configured to control the opening and closing of the wireless communication connection between the antenna unit 230 and the monitoring platform 300.
In some embodiments of the present application, referring to fig. 2, the apparatus further includes a download debug module 400; the download debugging module 400 is in communication connection with the control module 200; the download debugging module 400 is used for importing and debugging the control program and parameters of the control module 200.
Referring to fig. 7, because the configuration of parameters of the wireless communication of the control module 200 and the operation of the IO port are all written in through the serial port 1 of the module, in this application, a download debug circuit as shown in fig. 5 is designed, in this embodiment, the use of a general Type-C interface is more convenient for program burning and debugging, and the use of a small-packaged USB-TTL conversion chip CH340X is also more beneficial to circuit layout, thereby reducing difficulty in design and development.
In some embodiments of the present application, with continued reference to fig. 2, the apparatus further includes a power supply module 500; the power supply module 500 is electrically connected with the detection module 100 and the control module 200; the power supply module 500 is used for supplying power to the detection module 100 and the control module 200; the control module 200 further includes a power management unit 250, and the power management unit 250 is configured to control switching of the power supply module 500.
Specifically, in this embodiment of the present application, the power supply module 500 may use 220V ac as a power source, and obtain a low-voltage dc power source required by the system through the ACDC isolation power conversion module AP12N24-Zero, where the circuit is shown in fig. 8, U1 is an ACDC power module, and an EMC circuit is already protected inside the module, so that 220V mains supply only needs to add a FUSE (FUSE 1), a thermistor (R3), and a varistor (RV 1) to protect the circuit, and the dc output end also suppresses ripple through connecting a plurality of capacitors with different capacities in parallel, which absorbs interference of each frequency band, and greatly improves stability of outputting dc by the module.
Furthermore, since the 12V dc converted by the ACDC module cannot be directly connected to the chip for use, a DCDC circuit is also required to convert a 5V or 3.3V voltage source required by each module, and referring to fig. 9, the 5V voltage source in the circuit can be designed by using a buck power management chip BL8033CB6TR, the chip has a conversion efficiency up to 96%, and a continuous output current up to 3A can completely meet the current design of the circuit system; the 3.3V voltage source can be designed by adopting the LDO power chip RT9013-33GB, compared with the LDO power chip AMS1117-3.3 of the same type, the small package of the SOT23-5 has larger advantages, the design of the enabled output pin has great advantages for a low-power consumption system, and the switching-on and switching-off circuit of the circuit shown in FIG. 9 can be realized by only two PMOS (AO 3401A), two diodes (1N 1448) and a plurality of resistors.
In some embodiments of the present application, the monitoring platform 300 is provided with a display screen, and the display screen is used for displaying and recording the leakage current value. The leakage current value can be rapidly obtained through the display screen in the hands of operation and maintenance personnel, and the leakage point can be rapidly judged, so that the circuits and the equipment can be timely maintained and overhauled.
As can be seen from the foregoing embodiment, the present application provides an online monitoring device for leakage current of a shielding layer of a smart cable, including: the system comprises a detection module, a control module and a monitoring platform; the control module is electrically connected with the detection module and is in wireless communication connection with the monitoring platform; the detection module is used for obtaining a plurality of leakage currents in one period on the intelligent cable shielding layer, calculating to obtain an effective leakage current value, generating a leakage current value signal, and sending the leakage current value signal to the control module; the control module is used for receiving the leakage current value signal and sending the leakage current value signal to the monitoring platform; the monitoring platform is used for receiving the leakage current value signal and displaying the leakage current value. The device realizes monitoring of the leakage current of the cable, effectively transmits information to operation and maintenance personnel, and enables the operation and maintenance personnel to quickly judge the leakage point so as to maintain and overhaul circuits and equipment in time, reduce the fault probability of the circuits and improve the reliability of the circuits; the leakage current of the cable shielding layer can be monitored on line in real time, leakage accidents caused by leakage can be effectively prevented, and personal and property safety can be better protected.
It should be noted that the embodiments of the present application are intended to cover a non-exclusive inclusion, such that a structure, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such structure, article, or apparatus. Without further limitation, the statement "comprises … …" does not exclude that an additional identical element is present in a structure, article or apparatus that comprises the element.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (8)
1. An intelligent cable shielding layer leakage current on-line monitoring device, which is characterized by comprising: the system comprises a detection module (100), a control module (200) and a monitoring platform (300);
the control module (200) is electrically connected with the detection module (100), and the control module (200) is in wireless communication connection with the monitoring platform (300);
the detection module (100) is used for acquiring a plurality of leakage currents in one period on the intelligent cable shielding layer, calculating an effective leakage current value, generating a leakage current value signal and sending the leakage current value signal to the control module (200);
the control module (200) is used for receiving the leakage current value signal and sending the leakage current value signal to the monitoring platform (300);
the monitoring platform (300) is used for receiving the leakage current value signal and displaying the leakage current value.
2. The smart cable shielding leakage current on-line monitoring device of claim 1, wherein the detection module (100) comprises a current transformer unit (110) and an electric energy metering unit (120);
the current transformer unit (110) is electrically connected with the intelligent cable shielding layer and the electric energy metering unit (120);
the current transformer unit (110) is used for detecting leakage current on the intelligent cable shielding layer, obtaining a leakage current signal and transmitting the leakage current signal to the electric energy metering unit (120);
the electric energy metering unit (120) is used for receiving the leakage current signal and processing the leakage current signal to obtain a leakage current value;
the electric energy metering unit (120) is further used for converting the leakage current value to obtain the leakage current value signal and sending the leakage current value signal to the control module (200).
3. The smart cable shielding leakage current on-line monitoring device of claim 1, wherein the control module (200) comprises a signal transceiving unit (210), a filtering unit (220) and an antenna unit (230);
the signal receiving and transmitting unit (210) is used for receiving or transmitting the leakage current value signal;
-the filtering unit (220) is configured to process the leakage current value signal;
the antenna unit (230) is used for being in wireless communication connection with the monitoring platform (300).
4. A smart cable barrier leakage current on-line monitoring device according to claim 3, wherein the control module (200) further comprises an antenna switch unit (240), the antenna switch unit (240) being configured to control the opening and closing of the wireless communication connection of the antenna unit (230) with the monitoring platform (300).
5. The smart cable barrier leakage current online monitoring device of claim 1, further comprising a download commissioning module (400);
the download debugging module (400) is in communication connection with the control module (200);
the download debugging module (400) is used for importing and debugging control programs and parameters of the control module (200).
6. The smart cable barrier leakage current on-line monitoring device of claim 1, further comprising a power supply module (500);
the power supply module (500) is electrically connected with the detection module (100) and the control module (200);
the power supply module (500) is used for supplying power to the detection module (100) and the control module (200);
the control module (200) further comprises a power management unit (250), the power management unit (250) being adapted to control the switching of the power supply module (500).
7. The intelligent cable shielding layer leakage current online monitoring device according to claim 2, wherein the current transformer unit (110) is a current transformer, and the current transformer is made of nanocrystalline high-conductivity soft magnetic material.
8. The intelligent cable shield leakage current on-line monitoring device according to claim 1, wherein the monitoring platform (300) is provided with a display screen for displaying and recording the leakage current value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311335588.1A CN117491901A (en) | 2023-10-16 | 2023-10-16 | Intelligent cable shielding layer leakage current on-line monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311335588.1A CN117491901A (en) | 2023-10-16 | 2023-10-16 | Intelligent cable shielding layer leakage current on-line monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115529080A (en) * | 2022-06-21 | 2022-12-27 | 武汉联特科技股份有限公司 | System for realizing business test of optical module in aging process |
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2023
- 2023-10-16 CN CN202311335588.1A patent/CN117491901A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115529080A (en) * | 2022-06-21 | 2022-12-27 | 武汉联特科技股份有限公司 | System for realizing business test of optical module in aging process |
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