CN110702255A - Built-in high-voltage cable joint temperature measuring device - Google Patents
Built-in high-voltage cable joint temperature measuring device Download PDFInfo
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- CN110702255A CN110702255A CN201911037174.4A CN201911037174A CN110702255A CN 110702255 A CN110702255 A CN 110702255A CN 201911037174 A CN201911037174 A CN 201911037174A CN 110702255 A CN110702255 A CN 110702255A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/34—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using capacitative elements
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- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention provides a built-in high-voltage cable joint temperature measuring device, which is used for detecting the temperature of a cable core joint and comprises a built-in temperature measuring unit, a communication unit and an external receiving unit, wherein the built-in temperature measuring unit comprises a temperature measuring sensor, a first processor and a first electric energy supply unit; the communication unit is arranged at the cable core joint; the temperature measuring sensor, the first processor, the first communication unit and the first electric energy supply unit are arranged in a shell; the external receiving unit comprises a second processor and a display, the second processor is connected with the display, and the second processor processes the temperature signals collected by the internal temperature measuring unit and sends the temperature signals to the display for displaying. The invention can effectively detect the temperature signal at the cable core joint and provide maintenance basis for cable maintenance personnel.
Description
Technical Field
The invention relates to the field of power cables, in particular to a built-in high-voltage cable joint temperature measuring device and method.
Background
The high-voltage cable is used as a blood vessel of a city and provides energy required by city life. Once a cable fails, the impact on city life is immeasurable. The main fault position of the high-voltage circuit is a high-voltage cable connector, and the high-voltage cable connector is well detected, so that the main point of ensuring the stable work of the high-voltage cable is provided. The high-voltage cable detection technology comprises temperature detection and partial discharge detection, and the temperature detection comprises optical fiber detection and built-in temperature detection.
The invention patent with publication number CN103837260A discloses a cable joint optical fiber temperature measuring device, wherein a cable joint is clamped by an upper clamping plate and a lower clamping plate through bolts, the upper clamping plate is provided with upper deformation teeth, the lower part of a flat plate is provided with lower deformation teeth, a signal optical fiber is clamped between the upper deformation teeth and the lower deformation teeth, the other end of the signal optical fiber is connected with a test unit, and the thermal expansion coefficient of the upper deformation teeth is larger than that of the bolts; when the temperature of the cable joint rises, the upper deformation teeth are caused to be high, so that the distance between the upper deformation teeth and the lower deformation teeth is close, the micro-bending rate of the signal optical fiber is increased, the optical signal transmitted in the signal optical fiber is attenuated, the change of the optical signal is monitored by the testing unit, the change value is transmitted to the processing unit, the processing unit calculates the change of the temperature of the cable joint, and judges whether to give an alarm or continue monitoring according to the change, but the temperature measurement of the optical fiber detects the temperature of the position where the optical fiber is implanted into the cable structure layer, which is not the real temperature of the cable guide core, and in the process of laying the cable in the ground, the temperature measurement function is lost because the optical fiber temperature measurement technology bears strong traction and is easy to break due to stretching, so the optical fiber temperature measurement technology has great limitation.
The invention patent application with the publication number of CN102636686A discloses a miniature monitoring device for a power cable intermediate joint, which is used inside cold-shrinkage and hot-shrinkage power cable intermediate joints, and comprises a temperature sensor, a CT electricity taking device serving as a current transformer, a super capacitor, a signal conditioning circuit, a power management module, a data processing module and a wireless communication module, wherein the wireless communication module is communicated with an external cable well data concentrator by adopting a 5.8G wireless communication technology. The invention can be only used for temperature detection of joints of cold-shrinkage and thermoplastic power cables, and the application range is relatively small.
Disclosure of Invention
In view of the above-discussed shortcomings and disadvantages of the prior art, it is an object of the present invention to at least address one or more of the above-discussed problems in the prior art.
One technical scheme for achieving the above purpose is as follows: a built-in high-voltage cable joint temperature measuring device is used for detecting the temperature of a cable core joint and comprises a built-in temperature measuring unit, a communication unit and an external receiving unit;
the built-in temperature measuring unit is connected with the external receiving unit through the communication unit, the built-in temperature measuring unit is installed at a cable core joint and comprises a temperature measuring sensor, a first processor and a first electric energy supply unit, the first processor is respectively connected with the temperature measuring sensor and the first electric energy supply unit, the first processor comprises an MCU, and the MCU receives temperature signals collected by the temperature measuring sensor and sends the temperature signals to the external receiving unit through the communication unit;
the communication unit comprises a first communication unit, and the first communication unit is arranged at the cable core joint and connected with the MCU;
the temperature measuring sensor, the first processor, the first communication unit and the first electric energy supply unit are arranged in a shell;
the external receiving unit comprises a second processor and a display, the second processor is connected with the display, and the second processor processes the temperature signals collected by the internal temperature measuring unit and sends the temperature signals to the display for displaying.
Preferably, the temperature measuring sensor comprises at least one of a thermistor, a thermistor and a temperature acquisition chip.
Preferably, the first communication unit adopts a wireless communication mode.
Preferably, the first power supply unit supports wireless charging and supplies power to the temperature sensor, the first processor and the first communication unit.
Preferably, the communication unit further comprises a second communication unit, which adopts a wireless communication mode, supports wireless charging, and is connected with the second power supply unit.
Preferably, the second communication unit is installed outside the rubber insulation layer of the cable joint and inside the cable sheath layer.
Preferably, the processing of the temperature signal by the second processor includes determining whether the temperature signal exceeds a set threshold, and alarming when the temperature signal exceeds the set threshold.
The built-in high-voltage cable joint temperature measuring device and the built-in high-voltage cable joint temperature measuring method can effectively detect the temperature signal at the cable core joint and provide a maintenance basis for cable maintenance personnel.
Drawings
FIG. 1 is a schematic structural view of a preferred embodiment of an in-line high voltage cable joint temperature measurement device according to the present invention;
FIG. 2 is a schematic flow chart of a method for measuring the temperature of a cable joint by using the built-in high-voltage cable joint temperature measuring device according to a preferred embodiment of the present invention;
FIG. 3 is a schematic view of a preferred embodiment at a high voltage cable joint;
FIG. 4 is a schematic view of the installation position of the built-in high-voltage cable joint temperature measuring device according to the present invention at the cable joint shown in FIG. 3 according to the embodiment shown in FIG. 1;
fig. 5 is a three-dimensional schematic view of a preferred embodiment of a built-in temperature measuring unit of the built-in high-voltage cable joint temperature measuring device according to the present invention.
Detailed Description
In order to better understand the technical solution of the present invention, the following detailed description is given by specific examples. The term "coupled" in the following description includes direct coupling and indirect coupling via other components, including electrical coupling via wires, and also includes coupling or communication via connectors, as well as other coupling schemes that allow two components to be brought into a relationship.
Example 1
As shown in fig. 1, the built-in high-voltage cable joint temperature measuring device includes a built-in temperature measuring unit 10, a communication unit 11 and an external receiving unit 12, wherein the built-in temperature measuring unit 10 is connected with the external receiving unit 12 through the communication unit 11.
In the present embodiment, it is preferable that the built-in temperature measuring unit 10 is installed at a cable core joint.
In this embodiment, it is preferable that the built-in temperature measuring unit 10 includes a temperature measuring sensor, a first processor, and a first power supply unit, wherein the first processor is connected to the temperature measuring sensor and the first power supply unit.
In this embodiment, it is preferable that the temperature measuring sensor includes a thermistor.
In this embodiment, it is preferable that the temperature sensor includes a thermistor.
In this embodiment, it is preferable that the temperature measuring sensor includes a temperature acquisition chip.
In this embodiment, it is preferable that the first processor includes an MCU, and the MCU receives the temperature signal collected by the temperature sensor and sends the temperature signal to the external receiving unit 12 through the communication unit 11.
In the present embodiment, it is preferable that the communication unit 11 includes a first communication unit and a second communication unit.
In this embodiment, it is preferable that the first communication unit is installed at the cable core connector and connected to the MCU.
In this embodiment, it is preferable that the first communication unit adopts a wireless communication mode.
In this embodiment, it is preferable that the first power supply unit supports wireless charging and supplies power to the temperature sensor, the first processor, and the first communication unit.
In this embodiment, it is preferable that the temperature measuring sensor, the first processor, the first communication unit, and the first power supply unit are installed in a housing.
In this embodiment, it is preferable that the second communication unit adopts a wireless communication mode.
In this embodiment, it is preferable that the second communication unit is installed outside the rubber insulating layer of the cable joint and inside the cable sheath.
In this embodiment, it is preferable that the second communication unit supports wireless charging and is connected to the second power supply unit.
In this embodiment, it is preferable that the external receiving unit 12 includes a second processor and a display, and the second processor is connected to the display.
In this embodiment, it is preferable that the second processor processes the temperature signal collected by the built-in temperature measurement unit 10 and sends the temperature signal to the display for displaying.
In this embodiment, it is preferable that the processing of the temperature signal by the second processor includes determining whether or not it exceeds a set threshold.
In this embodiment, it is preferable that the processing of the temperature signal by the second processor includes alarming when it is judged that the temperature signal exceeds a set threshold.
Example 2
As shown in fig. 2, a method for measuring the temperature of a built-in high-voltage cable joint, which adopts the built-in high-voltage cable joint temperature measuring device, comprises the following steps:
and S1, the built-in temperature measuring unit 10 collects temperature information at the cable core joint.
Temperature sensor gathers the temperature information of cable core department at first, and the temperature signal of first collection is analog signal, analog temperature signal passes through temperature sensor or be converted into digital signal behind MCU or the signal conversion circuit who sets up alone, MCU receives temperature signal obtains definite temperature value after handling digital signal, and will the temperature value transmits to first communication unit.
S2, the communication unit 11 receives the temperature information sent by the internal temperature measuring unit 10 and transmits the temperature information to the external receiving unit 12.
The first communication unit sends the received temperature value to the second communication unit, and the second communication unit sends the temperature value to the location receiving unit 12. The first communication unit may adopt a coupling communication or radio frequency communication mode, the second communication unit may convert data received through the coupling communication or radio frequency communication mode into a data format that may be sent by another wireless communication mode, and the second communication unit realizes remote wireless transmission of the temperature data and sends the temperature data to the external receiving unit 12.
And S3, the external receiving unit receives and judges the temperature information.
After receiving the temperature signal, the external receiving unit judges the temperature signal, and if the temperature signal does not exceed a set threshold, the external receiving unit executes step S51 to display the temperature; if the temperature exceeds the set threshold, step S52 is executed to display the temperature and alarm. The alarm mode comprises at least one of a buzzing alarm mode, a display lamp alarm mode and a common alarm mode of a voice alarm lamp.
Example 3
As shown in fig. 3 and 4, in the high voltage cable joint, there are included: a lead bond at 401, a heat shrink tube at 402, a connection tube at 403, a ground cable core at 404, a filler gel at 405, a short copper jacket at 406, a semi-conducting strip at 407, a copper mesh at 408. A semi-conducting strip referenced 409, a shielding tube referenced 410, a joint connection tube referenced 411, a stress control tube referenced 412, a stress cone referenced 413, a long copper jacket referenced 414, a lead weld referenced 415 and a waterproof tape referenced 416.
As shown in fig. 5, the built-in temperature measuring unit 10 and the first power supply unit are disposed on a circuit board 501, the circuit board 501 is disposed in a housing 502, the housing is mounted at a cable core joint and has a certain radian so as to be completely attached to the cable core, and the second communication unit 111 is disposed outside the rubber insulation layer and inside the cable sheath.
Example 4
The external receiving unit comprises a server, a smart phone, a tablet personal computer and other intelligent mobile devices, a unique code is set for each internal temperature measuring unit 10, the code is associated with the installation position of the internal temperature measuring unit, the temperature of all cable joints of the temperature measuring device can be monitored through the external receiving device, the change condition of the temperature of each cable joint can be monitored, when the external receiving unit judges that the temperature of the cable joints exceeds a set threshold value, an alarm is given, the number and the installation position of the abnormal cable joints are prompted, a quick maintenance basis is provided for maintenance personnel, whether the temperature mutation condition of the cable joints occurs or not can be judged through continuous monitoring of the temperature of the same cable joint, and then the maintenance personnel can be reminded to perform troubleshooting in time.
Example 5
In order to realize the electric energy supply of the built-in temperature measuring device, a power taking ring is installed at each cable joint, and the power taking ring is a novel power supply device which obtains electric energy by utilizing the electromagnetic induction principle and realizes stable voltage output. It adopts the open type design, the installation of being convenient for, convenient operation, can be according to the mutual-inductor internal diameter size of high-voltage line diameter size match, can match the mutual-inductor of different model specifications according to high-voltage line current size, the starting current is little, overcome the input superelevation input voltage and produced the impact to the power, take overcurrent protection device, can be used for the device on the great high tension cable of electric current scope, output stable DC power supply, have battery intelligence charge-discharge interface, under the not enough or power failure state of electric energy supply, can continue to maintain equipment normal operating. And providing wireless electric energy supply for the built-in temperature measuring unit 10 and the communication unit 11 by using the electric energy obtained by the electricity taking ring.
It should be noted that the technical solutions of the present application all relate to improvements in hardware, and do not relate to improvements in software; for each part without the indicated model, the part can be selected from common parts in the prior art and is not limited by the model; the components of the embodiments are indicated by the models, which are only used for describing the technical scheme of the application in detail, and it should be understood that the technical scheme to be protected by the invention is not limited by the models, and the prior art has many alternatives for replacing the components.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (7)
1. The utility model provides a built-in high tension cable connects temperature measuring device for carry out temperature detection to cable core joint department, including built-in temperature measurement unit, communication unit and external receiving element, its characterized in that:
the built-in temperature measuring unit is connected with the external receiving unit through the communication unit, the built-in temperature measuring unit is installed at a cable core joint and comprises a temperature measuring sensor, a first processor and a first electric energy supply unit, the first processor is respectively connected with the temperature measuring sensor and the first electric energy supply unit, the first processor comprises an MCU, and the MCU receives temperature signals collected by the temperature measuring sensor and sends the temperature signals to the external receiving unit through the communication unit;
the communication unit comprises a first communication unit, and the first communication unit is arranged at the cable core joint and connected with the MCU;
the temperature measuring sensor, the first processor, the first communication unit and the first electric energy supply unit are arranged in a shell;
the external receiving unit comprises a second processor and a display, the second processor is connected with the display, and the second processor processes the temperature signals collected by the internal temperature measuring unit and sends the temperature signals to the display for displaying.
2. The built-in high-voltage cable joint temperature measuring device as claimed in claim 1, wherein: the temperature measuring sensor comprises at least one of a thermistor, a thermistor capacitor and a temperature acquisition chip.
3. The built-in high-voltage cable joint temperature measuring device as claimed in claim 1, wherein: the first communication unit adopts a wireless communication mode.
4. The built-in high-voltage cable joint temperature measuring device as claimed in claim 1, wherein: the first electric energy supply unit supports wireless charging and provides electric energy for the temperature measurement sensor, the first processor and the first communication unit.
5. The built-in high-voltage cable joint temperature measuring device as claimed in claim 1, wherein: the communication unit further comprises a second communication unit, the second communication unit adopts a wireless communication mode, supports wireless charging and is connected with the second power supply unit.
6. The built-in high-voltage cable joint temperature measuring device as claimed in claim 5, wherein: the second communication unit is arranged outside the rubber insulating layer of the cable joint and in the cable armor layer.
7. The built-in high-voltage cable joint temperature measuring device as claimed in claim 1, wherein: the second processor processes the temperature signal, including judging whether the temperature signal exceeds a set threshold value, and alarming when the temperature signal exceeds the set threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911037174.4A CN110702255A (en) | 2019-10-29 | 2019-10-29 | Built-in high-voltage cable joint temperature measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911037174.4A CN110702255A (en) | 2019-10-29 | 2019-10-29 | Built-in high-voltage cable joint temperature measuring device |
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| CN110702255A true CN110702255A (en) | 2020-01-17 |
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| CN201911037174.4A Pending CN110702255A (en) | 2019-10-29 | 2019-10-29 | Built-in high-voltage cable joint temperature measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623850A (en) * | 2020-06-16 | 2020-09-04 | 南京沃天科技有限公司 | Liquid level transmitter waterproof sealing structure |
| CN113064040A (en) * | 2021-05-18 | 2021-07-02 | 国网河南省电力公司南阳供电公司 | Coated cable joint fault early warning device and method |
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| CN101319938A (en) * | 2008-07-08 | 2008-12-10 | 周骁威 | On-line temperature measurement method and device for cable joint of high-voltage plant |
| JP2009053025A (en) * | 2007-08-27 | 2009-03-12 | Fujikura Ltd | Connection device of high-voltage power cable, and temperature monitoring method of connection part of high-voltage power cable |
| CN102175341A (en) * | 2010-11-11 | 2011-09-07 | 浙江图维电力科技有限公司 | Accurate temperature measurement technology and device thereof for cable connector based on radio frequency technology |
| CN202024833U (en) * | 2010-11-11 | 2011-11-02 | 浙江图维电力科技有限公司 | Cable joint accurate temperature measurement device based on radio frequency technique |
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2019
- 2019-10-29 CN CN201911037174.4A patent/CN110702255A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005057896A (en) * | 2003-08-05 | 2005-03-03 | Uchihashi Estec Co Ltd | Abnormal heating monitoring system for overhead wire |
| JP2009053025A (en) * | 2007-08-27 | 2009-03-12 | Fujikura Ltd | Connection device of high-voltage power cable, and temperature monitoring method of connection part of high-voltage power cable |
| CN101319938A (en) * | 2008-07-08 | 2008-12-10 | 周骁威 | On-line temperature measurement method and device for cable joint of high-voltage plant |
| CN102175341A (en) * | 2010-11-11 | 2011-09-07 | 浙江图维电力科技有限公司 | Accurate temperature measurement technology and device thereof for cable connector based on radio frequency technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111623850A (en) * | 2020-06-16 | 2020-09-04 | 南京沃天科技有限公司 | Liquid level transmitter waterproof sealing structure |
| CN113064040A (en) * | 2021-05-18 | 2021-07-02 | 国网河南省电力公司南阳供电公司 | Coated cable joint fault early warning device and method |
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