CN103808430A - High-voltage device cable head temperature online monitoring device - Google Patents
High-voltage device cable head temperature online monitoring device Download PDFInfo
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- CN103808430A CN103808430A CN201210457378.5A CN201210457378A CN103808430A CN 103808430 A CN103808430 A CN 103808430A CN 201210457378 A CN201210457378 A CN 201210457378A CN 103808430 A CN103808430 A CN 103808430A
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Abstract
The invention discloses a high-voltage device cable head temperature online monitoring device which comprises an A-phase temperature measuring unit, a B-phase temperature measuring unit, a C-phase temperature measuring unit, an environment temperature sensor, a data acquirer, an external power supply circuit and an interface circuit. The high-voltage device cable head temperature online monitoring device adopts a method for indirectly measuring the inside temperature of a cable head according to the inside and outside temperature gradient relation by measuring the cable head surface temperature, namely a special sensor installing tape having heat preservation and heat insulating functions is bundled on an outer surface layer at each cable head attachment heat-emitting position to enable the temperature sensor to right adhere to a surface layer of a cable head attachment, a heat preservation material is filled in a temperature sensor housing to keep the local temperature conducted by heat-emitting points to the surface layer of the cable head attachment, meanwhile one environment temperature sensor is placed nearby the cable head, and experimentally measured compensation data are obtained in advance by measuring a difference value of a cable attachment heat preservation point and the environment temperature.
Description
Technical field
The present invention relates to a kind of on-line monitoring high-tension apparatus cable end temperature rise situation, and then high-tension apparatus cable end hot stall is diagnosed, ensure the safe operation of electric system.
Background technology
In order to guarantee the safe operation of electric system, electric system thermal fault detection is subject to people's generally attention, high voltage bus is in the time that the contact of running overload or high-voltage switch gear is bad, because contact resistance becomes large, produce fever phenomenon in the out-of-date meeting of load current flow, this fever phenomenon causes that insulation ag(e)ing even punctures, thereby causes short circuit, form major accident, cause heavy economic losses.
In the electric power system that adopts power cable to transmit electricity, according to the AUTHORITATIVE DATA analysis of power industry, the fault of the switch cubicle 90% of all-inflation and all-insulation is the problem going out due to line cable junction, that field staff is owing to not installing in strict accordance with the working specification of cable mostly, mounted cable, cannot directly judge whether junction connects, if it is unreliable to install, can cause installation place contact resistance to increase, when operation, contact portion temperature rise exceeds the allowed band of national regulation, make cable termination produce insulation ag(e)ing, destroy insulating capacity, cause the accident of singlephase earth fault or phase fault, therefore, detect and monitor the temperature of cable joint of high-voltage plant, find in advance and get rid of hot stall hidden danger, safe and reliable operation to electric system has very important significance.
But the power equipments such as high-pressure aerated switch cubicle and high voltage cable branch box, its output cable generally adopts insulating sleeve and elbow type, the cable accessories such as T-shaped plug are formed by connecting, if when connection because the problems such as installation cause that contact resistance is excessive, the electric conductor of tie point can generate heat, because the copper conductor of insulator inside is in high voltage end, its heating situation can not adopt again traditional contact or non-contacting temperature sensor to detect, bring difficulty to temperature of cable junction on-line monitoring, for this reason, the present invention adopts the method for measuring cable end internal temperature by measuring cable end surface temperature according to the relation indirect of internal and external temperature gradient, tie up a sensor special mounting strap with insulation at the extexine of each cable end annex heating position, make temperature sensor be close to the top layer of cable end annex, fill insulant material in temperature sensor case, the local temperature that makes heat generating spot be transmitted to cable end annex top layer can keep, near cable end, place an environment temperature sensor simultaneously, obtain in advance the offset data by measuring by measuring the difference of cable accessory insulation point and environment temperature.
Summary of the invention
Technical matters to be solved by this invention is to provide one to be come indirectly to measure cable end internal temperature with ambient temperature by measuring cable end external temperature, and then cable splice hot stall is diagnosed, and ensures the device of the safe operation of electric system.
For solving the problems of the technologies described above, the invention provides a kind of high-tension apparatus cable head temperature on-Line Monitor Device, comprise A phase temperature measuring unit, B phase temperature measuring unit, C phase temperature measuring unit, environment temperature sensor, data acquisition unit, external power source circuit and interface circuit.
A phase temperature measuring unit, B phase temperature measuring unit and C phase temperature measuring unit are separately fixed on the high-tension apparatus cable end of corresponding phase.
A phase temperature measuring unit, B phase temperature measuring unit and C phase temperature measuring unit comprise respectively temperature sensor, insulation material and mount cable-tie; Temperature sensor is placed on insulation material inside, temperature sensor and insulation material are fixed on high-tension apparatus cable end by mount cable-tie, indirectly measure high-tension apparatus cable end inside by measuring high-tension apparatus cable end external temperature, realize the on-line monitoring of high-tension apparatus cable head temperature.
External power source circuit can be solar cell for supplying power, also can powered battery, also can CT coupling power taking power supply, and also can ac power supply.
Interface circuit, can be 485 interfaces, can be also 232 interfaces.
High-tension apparatus cable head temperature on-line monitoring adopts the method for measuring cable end internal temperature by measuring cable end surface temperature according to the relation indirect of internal and external temperature gradient, tie up a sensor special mounting strap with insulation at the extexine of each cable end annex heating position, it is A phase temperature measuring unit, B phase temperature measuring unit and C phase temperature measuring unit, make temperature sensor be close to the top layer of cable end annex, fill insulant material in temperature sensor case, the local temperature that makes heat generating spot be transmitted to cable end annex top layer can keep, near cable end, place an environment temperature sensor simultaneously, obtain in advance the offset data by measuring by measuring the difference of cable accessory insulation point and environment temperature.
Data acquisition unit, comprises microprocessor, key circuit, display circuit and power-switching circuit; A phase testing temperature cell sensor, B phase testing temperature cell sensor, C phase testing temperature cell sensor and environment temperature sensor are connected with the A/D end of microprocessor respectively.
The present invention has positive effect: in (1) high-tension apparatus cable head temperature of the present invention on-Line Monitor Device, adopt the method for measuring cable end internal temperature by measuring cable end surface temperature according to the relation indirect of internal and external temperature gradient, tie up a sensor special mounting strap with insulation at the extexine of each cable end annex heating position, it is A phase temperature measuring unit, B phase temperature measuring unit and C phase temperature measuring unit, make temperature sensor be close to the top layer of cable end annex, fill insulant material in temperature sensor case, the local temperature that makes heat generating spot be transmitted to cable end annex top layer can keep, near cable end, place an environment temperature sensor simultaneously, obtain in advance the offset data by measuring by measuring the difference of cable accessory insulation point and environment temperature.(2) high-tension apparatus cable head temperature on-Line Monitor Device external power source of the present invention can be solar cell for supplying power, also can powered battery, also can CT coupling power taking power supply, and also can ac power supply.(3) high-tension apparatus cable head temperature on-Line Monitor Device of the present invention, temperature data can pass to data center by GPRS and 458 by interface circuit.
Accompanying drawing explanation
Fig. 1 is the high-tension apparatus cable head temperature on-Line Monitor Device fundamental diagram of embodiment 1.
Fig. 2 is the data acquisition unit schematic diagram of embodiment 1.
Embodiment
See shown in Fig. 1, Fig. 2 that the high-tension apparatus cable head temperature on-Line Monitor Device of the present embodiment comprises A phase temperature measuring unit, B phase temperature measuring unit, C phase temperature measuring unit, environment temperature sensor 1, data acquisition unit 2, external power source circuit 3 and interface circuit 4.
A phase temperature measuring unit, B phase temperature measuring unit and C phase temperature measuring unit are separately fixed on the high-tension apparatus cable end of corresponding phase.
A phase temperature measuring unit, B phase temperature measuring unit and C phase temperature measuring unit comprise respectively temperature sensor, insulation material and mount cable-tie; Temperature sensor is placed on insulation material inside, temperature sensor and insulation material are fixed on high-tension apparatus cable end by mount cable-tie, indirectly measure high-tension apparatus cable end inside by measuring high-tension apparatus cable end external temperature, realize the on-line monitoring of high-tension apparatus cable head temperature.
External power source circuit 3 can be solar cell for supplying power, also can powered battery, also can CT coupling power taking power supply, and also can ac power supply.
Interface circuit 4, can be 485 interfaces, can be also 232 interfaces.
High-tension apparatus cable head temperature on-line monitoring adopts the method for measuring cable end internal temperature by measuring cable end surface temperature according to the relation indirect of internal and external temperature gradient, tie up a sensor special mounting strap with insulation at the extexine of each cable end annex heating position, it is A phase temperature measuring unit, B phase temperature measuring unit and C phase temperature measuring unit, make temperature sensor be close to the top layer of cable end annex, fill insulant material in temperature sensor case, the local temperature that makes heat generating spot be transmitted to cable end annex top layer can keep, near cable end, place an environment temperature sensor simultaneously, obtain in advance the offset data by measuring by measuring the difference of cable accessory insulation point and environment temperature.
Data acquisition unit 2, comprises microprocessor 2-1, key circuit 2-2, display circuit 2-3 and power-switching circuit 2-4; A phase testing temperature cell sensor, B phase testing temperature cell sensor, C phase testing temperature cell sensor and environment temperature sensor 1 are connected with the A/D end of microprocessor 2-1 respectively.
Claims (7)
1. high-tension apparatus cable head temperature on-Line Monitor Device, it is characterized in that, comprise A phase temperature measuring unit, B phase temperature measuring unit, C phase temperature measuring unit, environment temperature sensor (1), data acquisition unit (2), external power source circuit (3) and interface circuit (4).
2. high-tension apparatus cable head temperature on-Line Monitor Device as claimed in claim 1, is characterized in that, A phase temperature measuring unit, B phase temperature measuring unit and C phase temperature measuring unit are separately fixed on the high-tension apparatus cable end of corresponding phase.
3. high-tension apparatus cable head temperature on-Line Monitor Device as claimed in claim 1, is characterized in that, A phase temperature measuring unit, B phase temperature measuring unit and C phase temperature measuring unit comprise respectively temperature sensor, insulation material and mount cable-tie; Temperature sensor is placed on insulation material inside, temperature sensor and insulation material are fixed on high-tension apparatus cable end by mount cable-tie, indirectly measure high-tension apparatus cable end inside by measuring high-tension apparatus cable end external temperature, realize the on-line monitoring of high-tension apparatus cable head temperature.
4. high-tension apparatus cable head temperature on-Line Monitor Device as claimed in claim 1, it is characterized in that, external power source circuit (3) can be solar cell for supplying power, also can powered battery, also can CT coupling power taking power, also can ac power supply.
5. high-tension apparatus cable head temperature on-Line Monitor Device as claimed in claim 1, is characterized in that, interface circuit (4) can be 485 interfaces, can be also 232 interfaces.
6. high-tension apparatus cable head temperature on-Line Monitor Device as claimed in claim 1, it is characterized in that, high-tension apparatus cable head temperature on-line monitoring adopts the method for measuring cable end internal temperature by measuring cable end surface temperature according to the relation indirect of internal and external temperature gradient, tie up a sensor special mounting strap with insulation at the extexine of each cable end annex heating position, it is A phase temperature measuring unit, B phase temperature measuring unit and C phase temperature measuring unit, make temperature sensor be close to the top layer of cable end annex, fill insulant material in temperature sensor case, the local temperature that makes heat generating spot be transmitted to cable end annex top layer can keep, near cable end, place an environment temperature sensor simultaneously, obtain in advance the offset data by measuring by measuring the difference of cable accessory insulation point and environment temperature.
7. high-tension apparatus cable head temperature on-Line Monitor Device as claimed in claim 1, it is characterized in that, data acquisition unit (2), comprises microprocessor (2-1), key circuit (2-2), display circuit (2-3) and power-switching circuit (2-4); A phase testing temperature cell sensor, B phase testing temperature cell sensor, C phase testing temperature cell sensor and environment temperature sensor (1) are connected with the A/D end of microprocessor (2-1) respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210457378.5A CN103808430A (en) | 2012-11-12 | 2012-11-12 | High-voltage device cable head temperature online monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210457378.5A CN103808430A (en) | 2012-11-12 | 2012-11-12 | High-voltage device cable head temperature online monitoring device |
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| CN103808430A true CN103808430A (en) | 2014-05-21 |
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| CN201210457378.5A Pending CN103808430A (en) | 2012-11-12 | 2012-11-12 | High-voltage device cable head temperature online monitoring device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644149A (en) * | 2017-02-16 | 2017-05-10 | 国网河南省电力公司商丘供电公司 | Online monitoring device for temperature rise of cable intermediate joint of electric cable well |
| CN109375069A (en) * | 2018-09-27 | 2019-02-22 | 河海大学常州校区 | A kind of end insulation characterisitic on-Line Monitor Device and method |
| CN109489840A (en) * | 2018-11-16 | 2019-03-19 | 国网上海市电力公司 | A kind of cable mid head In-Line Temperature Measure System and method based on cloud database |
| CN109916523A (en) * | 2019-02-27 | 2019-06-21 | 南京乾鑫电器设备有限公司 | A kind of switchgear cable vault heating accident monitors system and method |
| CN110631723A (en) * | 2019-10-17 | 2019-12-31 | 国网河南省电力公司济源供电公司 | Cable joint and temperature rise remote monitoring equipment system of temperature gradient method |
| CN112697290A (en) * | 2020-11-27 | 2021-04-23 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for detecting charging temperature of steel billet |
| CN113125035A (en) * | 2019-12-31 | 2021-07-16 | 福建船政交通职业学院 | Device for monitoring cable head fault on line and monitoring method thereof |
| CN114967571A (en) * | 2022-07-28 | 2022-08-30 | 山东汇能电气有限公司 | Aerify cabinet remote monitering system based on internet |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644149A (en) * | 2017-02-16 | 2017-05-10 | 国网河南省电力公司商丘供电公司 | Online monitoring device for temperature rise of cable intermediate joint of electric cable well |
| CN109375069A (en) * | 2018-09-27 | 2019-02-22 | 河海大学常州校区 | A kind of end insulation characterisitic on-Line Monitor Device and method |
| CN109489840A (en) * | 2018-11-16 | 2019-03-19 | 国网上海市电力公司 | A kind of cable mid head In-Line Temperature Measure System and method based on cloud database |
| CN109916523A (en) * | 2019-02-27 | 2019-06-21 | 南京乾鑫电器设备有限公司 | A kind of switchgear cable vault heating accident monitors system and method |
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| CN113125035A (en) * | 2019-12-31 | 2021-07-16 | 福建船政交通职业学院 | Device for monitoring cable head fault on line and monitoring method thereof |
| CN112697290A (en) * | 2020-11-27 | 2021-04-23 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for detecting charging temperature of steel billet |
| CN112697290B (en) * | 2020-11-27 | 2022-03-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for detecting charging temperature of steel billet |
| CN114967571A (en) * | 2022-07-28 | 2022-08-30 | 山东汇能电气有限公司 | Aerify cabinet remote monitering system based on internet |
| CN114967571B (en) * | 2022-07-28 | 2022-10-18 | 山东汇能电气有限公司 | Aerify cabinet remote monitering system based on internet |
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Application publication date: 20140521 |