CN111276927A - Cable intermediate joint monitoring and protecting device and system based on CT power taking and application method - Google Patents
Cable intermediate joint monitoring and protecting device and system based on CT power taking and application method Download PDFInfo
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- CN111276927A CN111276927A CN202010251029.2A CN202010251029A CN111276927A CN 111276927 A CN111276927 A CN 111276927A CN 202010251029 A CN202010251029 A CN 202010251029A CN 111276927 A CN111276927 A CN 111276927A
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- Prior art keywords
- cable intermediate
- intermediate joint
- monitoring
- cable
- communication relay
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/08—Cable junctions
- H02G15/10—Cable junctions protected by boxes, e.g. by distribution, connection or junction boxes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention discloses a monitoring and protecting device, a system and an application method of a cable intermediate joint based on CT electricity taking. The system comprises a communication relay device and the detection protection device; the application method is to push alarm messages according to the temperature and the pressure. The invention can realize passive and wireless real-time monitoring of the cable intermediate connector, does not need to replace batteries during monitoring, and effectively solves the problems of monitoring and controlling the state of the 10KV cable intermediate connector.
Description
Technical Field
The invention relates to a security technology of a cable intermediate joint, in particular to a cable intermediate joint monitoring and protecting device and system based on CT (current transformer) power taking and an application method.
Background
Power cables are becoming more and more popular today as an important component of urban power transmission lines. The cable intermediate joint is a weak link of the cable and is also a place where faults are most likely to occur. Especially for 10kV cables, once a fire accident occurs in the intermediate joint, the intermediate joint can always run under load, and operation and maintenance personnel determine a certain time period of a fault point, so that the emergency repair time is long, the emergency repair is not timely, and the disaster situation is further expanded. Therefore, how to avoid fire accidents of the 10KV cable intermediate connector becomes a key technical problem to be solved urgently.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the problems in the prior art, the invention provides a cable intermediate joint monitoring and protecting device based on CT electricity taking, a system and an application method thereof, the passive and wireless real-time monitoring of the cable intermediate joint can be realized, the battery does not need to be replaced during the monitoring, and the problems of state monitoring and control of the 10KV cable intermediate joint are effectively solved.
In order to solve the technical problems, the invention adopts the technical scheme that:
the utility model provides a cable intermediate head monitoring protection device based on CT gets electricity, is including the explosion-proof box that has cable intermediate head holding chamber, be equipped with temperature sensor, pressure sensor, signal transmitter and at least one first CT in the cable intermediate head holding chamber respectively, temperature sensor, pressure sensor's output links to each other with signal transmitter, first CT cover is established on the cable of cable intermediate head holding intracavity, the output of first CT links to each other with temperature sensor, pressure sensor, signal transmitter's power end.
Optionally, the signal transmitter includes a single chip microcomputer and a wireless communication module which are connected to each other, and output ends of the temperature sensor and the pressure sensor are connected to the single chip microcomputer.
Optionally, the wireless communication module is a mobile network communication module.
Optionally, the explosion-proof box is in a spindle state, cable mounting holes for penetrating cables are respectively formed in two ends of the explosion-proof box, and the cables on two sides of the cable intermediate joint are inserted into the cable mounting holes and are in interference fit with the inner wall of the cable mounting holes, so that the inner part of the accommodating cavity of the cable intermediate joint keeps sealed.
Optionally, the cable intermediate joint accommodating cavity is filled with fireproof heat insulation cotton.
Optionally, the explosion-proof box is made of epoxy resin, and an energy release hole is further formed in the outer wall of the explosion-proof box.
In addition, the invention also provides a cable intermediate joint monitoring and protecting system based on CT electricity taking, which comprises a communication relay device and the cable intermediate joint monitoring and protecting device based on CT electricity taking, wherein the cable intermediate joint monitoring and protecting device is connected to a network through the communication relay device to send monitoring data.
Optionally, the communication relay device includes a battery power supply module and a communication relay module, which are connected to each other, and an output end of the battery power supply module is connected to a power supply end of the communication relay module.
Optionally, the communication relay device further includes a second CT, the second CT is sleeved on the cable, and an output end of the second CT is connected to a power supply end of the communication relay module.
In addition, the invention also provides an application method of the cable intermediate joint monitoring and protecting device based on CT electricity taking, which comprises the following implementation steps: the monitoring and protecting device for the cable intermediate joint based on CT electricity taking collects the temperature and the pressure of the cable intermediate joint, and if the temperature or the pressure exceeds a preset threshold value, an alarm message is pushed to an information terminal of an appointed operation and maintenance person in the station so as to remind the operation and maintenance person in the station to inquire or solve the hidden trouble.
Compared with the prior art, the invention has the following advantages:
1. the anti-explosion box comprises the anti-explosion box with the cable intermediate joint accommodating cavity, the cable intermediate joint can be effectively protected through the anti-explosion box, and the effect of prolonging the service life of the cable intermediate joint can be achieved.
2. The temperature sensor, the pressure sensor and the signal transmitter are respectively arranged in the accommodating cavity of the cable intermediate joint, the output ends of the temperature sensor and the pressure sensor are connected with the signal transmitter, and the temperature and the pressure of the cable intermediate joint can be monitored in real time through the components, so that the potential fault hazard of the cable intermediate joint can be effectively found, and a data basis can be provided for big data analysis of the cable intermediate joint.
3. The cable intermediate connector accommodating cavity is internally provided with at least one first CT, the first CT is sleeved on a cable in the cable intermediate connector accommodating cavity, the output end of the first CT is connected with the power supply ends of the temperature sensor, the pressure sensor and the signal transmitter, and local energy taking can be realized through the first CT, so that passive real-time monitoring on the cable intermediate connector can be realized, a battery does not need to be replaced during monitoring, and the problems of state monitoring and control of the 10KV cable intermediate connector are effectively solved.
Drawings
Fig. 1 is a schematic structural diagram of an explosion-proof box in the embodiment of the invention.
Fig. 2 is a schematic diagram of a frame structure of an electrical part in an embodiment of the present invention.
Illustration of the drawings: 1. an explosion-proof box; 10. a cable intermediate connector accommodating cavity; 11. a vent hole; 2. a temperature sensor; 3. a pressure sensor; 4. a signal transmitter; 41. a single chip microcomputer; 42. a wireless communication module; 5. a first CT; 6. a battery power supply module; 7. a communication relay module; 8. and a second CT.
Detailed Description
As shown in fig. 1 and fig. 2, the cable intermediate joint monitoring and protecting device based on CT power taking of the embodiment includes an explosion-proof box 1 having a cable intermediate joint accommodating cavity 10, a temperature sensor 2, a pressure sensor 3, a signal transmitter 4 and at least one first CT5 are respectively arranged in the cable intermediate joint accommodating cavity 10, output ends of the temperature sensor 2 and the pressure sensor 3 are connected with the signal transmitter 4, the first CT5 is sleeved on a cable in the cable intermediate joint accommodating cavity 10, and an output end of the first CT5 is connected with power supply ends of the temperature sensor 2, the pressure sensor 3 and the signal transmitter 4.
As shown in fig. 1, the explosion-proof box 1 in this embodiment is in a spindle state, cable mounting holes for cables to pass through are respectively formed at two ends of the explosion-proof box 1, and the cables at two sides of the cable intermediate connector are inserted into the cable mounting holes and are in interference fit with the inner wall of the cable mounting hole, so that the inside of the cable intermediate connector accommodating cavity 10 is kept sealed.
In this embodiment, the accommodating cavity 10 for the cable intermediate connector is filled with fireproof heat insulation cotton, so that heat and pressure inside the explosion-proof box do not leak, and the temperature and pressure monitoring precision can be improved.
In this embodiment, the explosion-proof box 1 is made of epoxy resin with good water resistance and fire resistance, and the outer wall of the explosion-proof box 1 is further provided with an energy release hole 11.
The diameter of the temperature sensor 2 is not more than 1cm, the measurement range is 20-1000 ℃, and the precision is more than or equal to 1%. The smaller volume of the temperature sensor 2 can be conveniently arranged in the explosion-proof box 1, and the temperature measurement requirement of the explosion-proof box 1 can be met with high precision and a larger measurement range.
The diameter of the pressure sensor 3 is not more than 2cm, the measurement range is 0.05 Mpa-100 Mpa, the precision is more than or equal to 0.05% FS, the smaller volume of the pressure sensor 3 can be conveniently placed in the explosion-proof box 1, and the high precision and the larger measurement range can meet the pressure measurement requirement of the explosion-proof box 1.
As shown in fig. 2, in the present embodiment, the signal transmitter 4 includes a single chip 41 and a wireless communication module 42 that are connected to each other, and the output ends of the temperature sensor 2 and the pressure sensor 3 are connected to the single chip 41, so as to realize wireless monitoring of temperature and pressure. In this embodiment, the wireless communication module 42 is a mobile network communication module. As an optional implementation manner, in this embodiment, the mobile network communication module adopts a 4G/5G wireless communication technology, and certainly, a GPRS and 3G wireless communication technology may also be adopted according to needs, and many wireless communication technologies of other internet of things may also be adopted, for example, short-distance communication technologies such as Zigbee, WiFi, bluetooth, Z-wave, and the like, or a low power consumption wide area network LPWAN communication technology facing a wide area network.
The first CT5 obtains electricity by using an alternating electromagnetic field in a 10kV single-phase cable, obtains energy consumption required by power supply from the cable directly according to the electromagnetic induction principle, and provides the energy consumption for the temperature sensor 2, the pressure sensor 3 and the signal transmitter 4 in the explosion-proof box 1.
As shown in fig. 2, this embodiment further provides a cable intermediate head monitoring and protecting system based on CT power taking, which includes a communication relay device and the cable intermediate head monitoring and protecting device based on CT power taking, where the cable intermediate head monitoring and protecting device is connected to a network through the communication relay device to send monitoring data, and the communication range of the cable intermediate head monitoring and protecting device based on CT power taking can be greatly expanded through the communication relay device.
As shown in fig. 2, the communication relay apparatus in this embodiment includes a battery power supply module 6 and a communication relay module 7 connected to each other, and an output terminal of the battery power supply module 6 is connected to a power supply terminal of the communication relay module 7. As an optional implementation manner, in this embodiment, the communication relay module 7 uses a 4G/5G wireless communication technology, and relays to receive the temperature and pressure data monitored by the sensor and send the signal to the monitoring platform. Needless to say, the communication relay module 7 may also adopt GPRS and 3G wireless communication technologies as required, and may also adopt many wireless communication technologies of other internet of things, for example, short-distance communication technologies such as Zigbee, WiFi, bluetooth, Z-wave, or a low power consumption wide area network LPWAN communication technology facing a wide area network.
As shown in fig. 2, the communication relay device in this embodiment further includes a second CT8, the second CT8 is sleeved on the cable, and an output end of the second CT8 is connected to a power source end of the communication relay module 7. The communication relay device is arranged in a cable tunnel (ditch), and because cables of 110kV, 220kV and the like are commonly arranged in the cable tunnel (ditch), the communication relay device can supply power by using a second CT8 mode so as to ensure the reliability of the power supply of the communication relay device.
In addition, this embodiment still provides an aforementioned cable intermediate head monitoring protection device's application method based on CT gets electricity, and the implementation step includes: the temperature and the pressure of the cable intermediate joint are collected through the cable intermediate joint monitoring and protecting device based on CT electricity taking, and if the temperature or the pressure exceeds a preset threshold value, an alarm message is pushed to an information terminal of an appointed operation and maintenance person in the station so as to remind the operation and maintenance person in the station to inquire or solve the hidden trouble. According to the method, the temperature and the pressure in the explosion-proof box 1 are used as monitoring quantities, temperature and pressure measurement data are collected in real time, the power consumption of the temperature sensor 2 and the pressure sensor 3 is provided in a power taking mode through the first CT5, the data are transmitted into the communication relay device and the monitoring platform (shown as a in figure 1) in a 4G/5G wireless communication mode, passive and wireless real-time monitoring of the 10kV cable intermediate joint state is achieved, the monitoring platform sends alarm information to an in-station operation and maintenance personnel information terminal (mobile phone APP), inquiry is reminded, fault hidden dangers are solved, and the operation and maintenance level of the power cable is improved. The monitoring platform receives the internal temperature and pressure data of the middle head protection box in real time, sets an alarm threshold value, immediately sends alarm information to the information terminal when the alarm threshold value is exceeded, and reminds operation and maintenance personnel to check and eliminate hidden troubles of faults. In this embodiment, the monitoring platform and the communication relay device are in 4G/5G wireless communication.
The method for judging the fault is that the temperature or the pressure exceeds a preset threshold, and as a further improvement method, the method may further include a judgment method using a machine learning model, that is: and inputting the temperature and the pressure into a machine learning model trained in advance, so as to obtain a corresponding cable intermediate joint state, and if the cable intermediate joint state is a fault state or a fault hidden trouble state, sending an alarm message. As an alternative embodiment, the machine learning model may employ a BP neural network model as desired. When a BP neural network model is trained in advance, a large amount of sample data of a cable intermediate joint needs to be detected and generated, wherein the sample data comprises the temperature and the pressure of the cable intermediate joint and the state of the cable intermediate joint corresponding to the temperature and the pressure, the BP neural network model is trained through the sample data, and the training can be completed when the error is lower than a preset threshold value or the training times exceed preset times.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. The utility model provides a cable intermediate head monitoring protection device based on CT gets electricity, its characterized in that, including explosion-proof box (1) that has cable intermediate head holding chamber (10), be equipped with temperature sensor (2), pressure sensor (3), signal transmitter (4) and at least one first CT (5) in cable intermediate head holding chamber (10) respectively, the output of temperature sensor (2), pressure sensor (3) links to each other with signal transmitter (4), first CT (5) cover is established on the cable in cable intermediate head holding chamber (10), the output of first CT (5) links to each other with the power end of temperature sensor (2), pressure sensor (3), signal transmitter (4).
2. The cable intermediate joint monitoring and protecting device based on CT power taking as recited in claim 1, wherein the signal transmitter (4) comprises a single chip microcomputer (41) and a wireless communication module (42) which are connected with each other, and the output ends of the temperature sensor (2) and the pressure sensor (3) are connected with the single chip microcomputer (41).
3. The cable intermediate joint monitoring and protecting device based on CT electricity taking as recited in claim 1, wherein the wireless communication module (42) is a mobile network communication module.
4. The cable intermediate joint monitoring and protecting device based on CT power taking as recited in claim 1, wherein the explosion-proof box (1) is in a spindle state, cable mounting holes for cables to penetrate through are respectively arranged at two ends of the explosion-proof box (1), and the cables at two sides of the cable intermediate joint are inserted into the cable mounting holes and are in interference fit with the inner wall of the cable mounting holes so that the inside of the cable intermediate joint accommodating cavity (10) is kept sealed.
5. The monitoring and protecting device for the cable intermediate joint based on CT electricity taking as recited in claim 4, wherein the accommodating cavity (10) for the cable intermediate joint is filled with fireproof heat insulation cotton.
6. The monitoring and protecting device for the intermediate joint of the cable based on CT power taking as claimed in claim 1, wherein the explosion-proof box (1) is made of epoxy resin, and the outer wall of the explosion-proof box (1) is further provided with an energy release hole (11).
7. A cable intermediate joint monitoring and protecting system based on CT electricity taking is characterized by comprising a communication relay device and the cable intermediate joint monitoring and protecting system based on CT electricity taking as claimed in any one of claims 1 to 6, wherein the cable intermediate joint monitoring and protecting system is connected to a network through the communication relay device to send monitoring data.
8. The monitoring and protecting system for the cable intermediate joint based on CT power taking as recited in claim 7, wherein the communication relay device comprises a battery power supply module (6) and a communication relay module (7) which are connected with each other, and an output end of the battery power supply module (6) is connected with a power supply end of the communication relay module (7).
9. The cable intermediate joint monitoring and protecting system based on CT power taking as recited in claim 8, wherein the communication relay device further comprises a second CT (8), the second CT (8) is sleeved on the cable, and the output end of the second CT is connected with the power supply end of the communication relay module (7).
10. An application method of the cable intermediate joint monitoring and protecting device based on CT electricity taking as claimed in any one of claims 1-6, characterized by comprising the following implementation steps: the monitoring and protecting device for the cable intermediate joint based on CT electricity taking collects the temperature and the pressure of the cable intermediate joint, and if the temperature or the pressure exceeds a preset threshold value, an alarm message is pushed to an information terminal of an appointed operation and maintenance person in the station so as to remind the operation and maintenance person in the station to inquire or solve the hidden trouble.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010251029.2A CN111276927A (en) | 2020-04-01 | 2020-04-01 | Cable intermediate joint monitoring and protecting device and system based on CT power taking and application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010251029.2A CN111276927A (en) | 2020-04-01 | 2020-04-01 | Cable intermediate joint monitoring and protecting device and system based on CT power taking and application method |
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| CN111276927A true CN111276927A (en) | 2020-06-12 |
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| CN202010251029.2A Pending CN111276927A (en) | 2020-04-01 | 2020-04-01 | Cable intermediate joint monitoring and protecting device and system based on CT power taking and application method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350264A (en) * | 2020-10-10 | 2021-02-09 | 国网河北省电力有限公司石家庄供电分公司 | Cable accessory temperature detection device and method |
| CN112432670A (en) * | 2020-12-01 | 2021-03-02 | 深圳供电局有限公司 | Cable intermediate joint state detection method and system |
| CN112865009A (en) * | 2020-12-31 | 2021-05-28 | 广州霍斯通电气股份有限公司 | Cable intermediate joint, joint assembly and preparation method |
| CN113049991A (en) * | 2021-03-24 | 2021-06-29 | 国网山东省电力公司泰安供电公司 | Distribution network line cable middle head running state monitoring system |
| CN113252114A (en) * | 2021-06-11 | 2021-08-13 | 中国煤炭科工集团太原研究院有限公司 | Method and device for monitoring internal environment state of explosion-proof electrical equipment |
| CN114236295A (en) * | 2021-12-22 | 2022-03-25 | 上海欧秒电力监测设备有限公司 | Power cable on-line measuring device based on fuel factor |
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| CN113049991A (en) * | 2021-03-24 | 2021-06-29 | 国网山东省电力公司泰安供电公司 | Distribution network line cable middle head running state monitoring system |
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| CN114236295A (en) * | 2021-12-22 | 2022-03-25 | 上海欧秒电力监测设备有限公司 | Power cable on-line measuring device based on fuel factor |
| CN114236295B (en) * | 2021-12-22 | 2022-12-16 | 上海欧秒电力监测设备有限公司 | Power cable on-line measuring device based on fuel factor |
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Application publication date: 20200612 |