CN203132720U - A temperature rise online monitoring device of a high-voltage device cable connector - Google Patents
A temperature rise online monitoring device of a high-voltage device cable connector Download PDFInfo
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- CN203132720U CN203132720U CN 201320041355 CN201320041355U CN203132720U CN 203132720 U CN203132720 U CN 203132720U CN 201320041355 CN201320041355 CN 201320041355 CN 201320041355 U CN201320041355 U CN 201320041355U CN 203132720 U CN203132720 U CN 203132720U
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Abstract
Provided is a temperature rise online monitoring device of a high-voltage device cable connector. The temperature rise online monitoring device comprises an A-phase temperature acquiring circuit, a B-phase temperature acquiring circuit, a C-phase temperature acquiring circuit, a environment temperature acquiring circuit, a microprocessor, a display circuit, and a power supplying circuit. The three phases of temperature acquiring circuits and the environment temperature acquiring circuit are successively and correspondingly connected with four A/D interfaces of the microprocessor. The I/O port of the microprocessor is connected with the input port of the display circuit. The output port of the power supplying circuit is connected with the power end of the microprocessor. The power supplying circuit comprises a rectifying circuit, a filtering circuit, a voltage stabilizing circuit, and an energy storing circuit. The device is capable of correctly determining the temperature rise change case of the copper conductor of the joint of the three-phase high-voltage cable connector and is a scientific and effective solution device to completely eliminate significant accidents caused by cable connector temperature rise faults.
Description
Technical field
The utility model relates to temperature rise on-line monitoring circuit arrangement field, be particularly related to cable joint of high-voltage plant temperature rise on-Line Monitor Device, but be a kind of on-line monitoring high-tension apparatus cable end temperature rise situation, and then to high-tension apparatus cable end diagnosing malfunction, ensure the device of the safe operation of electric system.
Background technology
In order to guarantee the safe operation of electric system, the electric system thermal fault detection is subjected to people's generally attention, high voltage bus is when the contact loose contact of running overload or high-voltage switch gear, because contact resistance becomes big, produce the heating phenomenon in the out-of-date meeting of load current flow, this heating phenomenon causes insulation ag(e)ing even puncture, thereby causes short circuit, form major accident, cause heavy economic losses.
In the electric power system that adopts the power cable transmission of electricity, AUTHORITATIVE DATA analysis according to power industry, the fault of the switch cubicle 90% of all-inflation and all-insulation is because the problem that turnover line cable junction goes out, be the field staff mostly owing to do not install in strict accordance with the working specification of cable, mounted cable, can't judge directly whether the junction connects, if it is unreliable to install, can cause the installation place contact resistance to increase, during operation, the contact portion temperature rise exceeds the allowed band of national regulation, makes cable termination produce insulation ag(e)ing, destroyed 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, the safe and reliable operation of electric system is had very important significance.
The utility model content
The purpose of this utility model provides cable joint of high-voltage plant temperature rise on-Line Monitor Device, at the problem that is difficult for monitoring temperature in the cable, can ensure the safe operation of electric system to the high-voltage switch contact diagnosing malfunction.
The technical scheme that adopts is:
Cable joint of high-voltage plant temperature rise on-Line Monitor Device comprises three temperature collection circuit, temperature collection circuit, microprocessor, display circuit and feed circuit that structure is identical.
Its technical essential is:
Three identical temperature collection circuits of structure are respectively A phase temperature collection circuit, B phase temperature collection circuit and C temperature collection circuit mutually.The output terminal of A phase temperature collection circuit, B phase temperature collection circuit, C phase temperature collection circuit and temperature collection circuit successively with an A/D interface of microprocessor, the 2nd A/D interface, the 3rd A/D interface with the 4th the A/D interface is corresponding is connected.
The I/O mouth of microprocessor is connected with the input port of display circuit, and display circuit adopts the LCD display circuit, and model is TM1668.
The delivery outlet of feed circuit is connected with the power end of microprocessor, for it provides power supply.
Microprocessor adopts single-chip microcomputer.
Interface circuit is connected with the serial ports of microprocessor.Interface circuit can be RS485 wireline interface circuit.
Feed circuit comprise rectification circuit, filtering circuit, mu balanced circuit and tank circuit.The output terminal of rectification circuit is connected with the input end of filtering circuit, and the output terminal of filtering circuit is connected with the input end of mu balanced circuit, and the output terminal of mu balanced circuit is connected with the input end of tank circuit, and the output terminal of tank circuit is connected with the power end of microprocessor.
The input end of rectification circuit is connected to the power output end of high-voltage potential indicator.The input end of rectification circuit is the input end of feed circuit, and the input end of rectification circuit is connected with the cable end screen layer simultaneously, to obtain electric power signal.
Microprocessor can be selected PIC, MSP430, msc51 series or AVR series etc. for use.
Interface circuit also can be the wireless radio interface circuit.Three temperature collection circuits and temperature collection circuit also can adopt temperature sensor collecting temperature signal, three temperature sensors are embedded in the cable end insulation course inside of each phase respectively, the collecting temperature signal can use digital temperature sensor AD590, LM92.
Temperature sensor is imbedded insulator inside, and there is enough insulation to isolate with high-pressure side, realized the online detection of heating temp of cable end, the cable end heating part wraps in the insulator, its inner temperature rise can't externally measure temperature value, according to calorifics theory, temperature sensor is imbedded insulator inside, and there is enough insulation to isolate with high-pressure side, imbed temperature sensor in insulator inside and measure temperature and the environment temperature difference of high-pressure side copper conductor indirectly, realized the online detection of heating temp of cable end, this measuring method is safe and reliable, measurement data is accurate, is applicable to that the new equipment installation also can be applied to old scrap build.
Use the radio-frequency communication technology that the signal that temperature sensor collects is carried out wireless transmission, the real time temperature data can be delivered to the back microprocessor.In practice, only need three temperature sensors are embedded in bushing insulation course inside respectively, another temperature sensor be placed on cable splice near, be used for measuring the cable end ambient temperature, the temperature difference by the temperature in environment temperature and the insulation course compares, and can judge exactly that cable end is electrically connected synapsis temperature height.Three temperature collection circuits of this kind and temperature collection circuit be equal modular organizations also, can adopt the known product of Jiangsu Hua Tang Electrical Appliances Co., Ltd, so repeated description not.
Temperature collection circuit, temperature collection circuit and feed circuit also can adopt similar circuit with identical function, and the thermistor of use also can be selected 35K Ω thermistor for use.
Its advantage is:
The utility model adopts standard-field strength method to obtain power supply voltage signal.Can be microprocessor and little power consumption LCD display circuit provides stable work energy, can also measure parameters such as running current, short-circuit current, ground current.This device is safe and reliable, measurement data is accurate, being applicable to that new equipment is installed also can use and old scrap build, mainly operating 6kV-35kV high-tension apparatus cable end junction temperature is detected, adopt indirect contact, the online temperature measuring equipment of induction power taking, this device mainly reflects cable end junction copper conductor temperature rising state indirectly by measuring insulation course internal temperature and variation of ambient temperature, this kind monitoring device three-phase high-voltage cable end junction copper conductor temperature rise situation of change that can judge rightly, this device does not need external power supply, when utilizing the high-tension apparatus cable end by high voltage signal, exist capacity effect to obtain power supply power supply electric energy between cable conductor and the cable end screen layer, provide a kind of scientific and effective solving device for eliminating fully because cable end temperature rise fault causes major accident.
Description of drawings
Fig. 1 is synoptic diagram of the present utility model.
Embodiment
Cable joint of high-voltage plant temperature rise on-Line Monitor Device comprises three temperature collection circuit, temperature collection circuit 4, microprocessor 5, display circuit 6 and feed circuit 8 that structure is identical.
Three identical temperature collection circuits of structure are respectively A phase temperature collection circuit 1, B phase temperature collection circuit 2 and C temperature collection circuit 3 mutually.The output terminal of A phase temperature collection circuit 1, B phase temperature collection circuit 2, C phase temperature collection circuit 3 and temperature collection circuit 4 successively with an A/D interface 9, the 2nd A/D interface 10, the 3rd A/ D interface 11 and 12 corresponding connections of the 4th A/D interface of microprocessor 5.
The I/O mouth of microprocessor 5 is connected with the input port of display circuit 6, and display circuit 6 adopts low-power consumption LCD display circuit, and model is TM1668.
The delivery outlet of feed circuit 8 is connected with the power end of microprocessor 5, for it provides power supply.
Microprocessor 5 adopts ultra low-power microcontroller.Microprocessor 5 is selected MSP430 for use.
Interface circuit 7 is connected with the serial ports of microprocessor 5.Interface circuit 7 can be RS485 wireline interface circuit.Interface circuit 7 is the communication interface circuit, carries out both-way communication with microprocessor 5, plays the expansion interface effect.
Feed circuit 8 comprise rectification circuit, filtering circuit, mu balanced circuit and tank circuit.The output terminal of rectification circuit is connected with the input end of filtering circuit, and the output terminal of filtering circuit is connected with the input end of mu balanced circuit, and the output terminal of mu balanced circuit is connected with the input end of tank circuit, and the output terminal of tank circuit is connected with the power end of microprocessor.The output terminal of tank circuit is the delivery outlet of feed circuit 8.
The input end of rectification circuit is connected to the power output end of high-voltage potential indicator, and the input end of rectification circuit is the input end of feed circuit, and the input end of rectification circuit is connected with the cable end screen layer simultaneously, to obtain electric power signal.
Three identical temperature collection circuit and temperature collection circuit 4 of structure use thermistor temp Acquisition Circuit, thermistor model NTC10K3490 (10K Ω).Tank circuit can adopt super capacitor energy-storage, and model is ELNA company, DB-5R5D104.
Described feed circuit, three temperature collection circuits and the equal modular organization of temperature collection circuit are the known product of Jiangsu Hua Tang Electrical Appliances Co., Ltd, so repeated description not.
Claims (4)
1. cable joint of high-voltage plant temperature rise on-Line Monitor Device comprises three temperature collection circuit, temperature collection circuit (4), microprocessor (5), display circuit (6) and feed circuit (8) that structure is identical; It is characterized in that:
Three identical temperature collection circuits of structure are respectively A phase temperature collection circuit (1), B phase temperature collection circuit (2) and C temperature collection circuit (3) mutually; The output terminal of A phase temperature collection circuit (1), B phase temperature collection circuit (2), C phase temperature collection circuit (3) and temperature collection circuit (4) successively with an A/D interface (9), the 2nd A/D interface (10), the 3rd A/D interface (11) and the 4th corresponding connection of A/D interface (12) of microprocessor (5);
The I/O mouth of microprocessor (5) is connected with the input port of display circuit (6), and the delivery outlet of feed circuit (8) is connected with the power end of microprocessor (5);
Feed circuit (8) comprise rectification circuit, filtering circuit, mu balanced circuit and tank circuit; The output terminal of rectification circuit is connected with the input end of filtering circuit, and the output terminal of filtering circuit is connected with the input end of mu balanced circuit, and the output terminal of mu balanced circuit is connected with the input end of tank circuit, and the output terminal of tank circuit is connected with the power end of microprocessor.
2. cable joint of high-voltage plant temperature rise on-Line Monitor Device according to claim 1, it is characterized in that: the serial ports of microprocessor (5) is connected with interface circuit (7); Interface circuit (7) is RS485 wireline interface circuit.
3. cable joint of high-voltage plant temperature rise on-Line Monitor Device according to claim 1 and 2 is characterized in that: display circuit (6) adopts the LCD display circuit, and model is TM1668.
4. cable joint of high-voltage plant temperature rise on-Line Monitor Device according to claim 1 and 2 is characterized in that: microprocessor (5) employing single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320041355 CN203132720U (en) | 2013-01-25 | 2013-01-25 | A temperature rise online monitoring device of a high-voltage device cable connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320041355 CN203132720U (en) | 2013-01-25 | 2013-01-25 | A temperature rise online monitoring device of a high-voltage device cable connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203132720U true CN203132720U (en) | 2013-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320041355 Expired - Lifetime CN203132720U (en) | 2013-01-25 | 2013-01-25 | A temperature rise online monitoring device of a high-voltage device cable connector |
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| Country | Link |
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| CN (1) | CN203132720U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155012A (en) * | 2014-06-17 | 2014-11-19 | 广东安迪普科技有限公司 | Monitoring system capable of displaying temperature rise of cable head on site |
| CN104501990A (en) * | 2014-12-29 | 2015-04-08 | 河海大学常州校区 | Online monitoring system of cable connector temperature rise |
| CN105823574A (en) * | 2016-05-18 | 2016-08-03 | 云南电网有限责任公司昆明供电局 | Wireless temperature measurement device for monitoring temperature of arm contact of circuit breaker |
| CN106327842A (en) * | 2016-10-26 | 2017-01-11 | 杭州欣美成套电器制造有限公司 | Ring main unit temperature and current wireless collection device and collection method |
| 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 |
| CN108398617A (en) * | 2018-02-12 | 2018-08-14 | 江苏师范大学 | A kind of detection of super-pressure electrical body failure and transmitting device and detection method |
| CN111024160A (en) * | 2019-12-25 | 2020-04-17 | 四川瑞霆电力科技有限公司 | Acquisition method and system suitable for temperature and humidity online monitoring signals of cable core of power distribution cable connector |
-
2013
- 2013-01-25 CN CN 201320041355 patent/CN203132720U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155012A (en) * | 2014-06-17 | 2014-11-19 | 广东安迪普科技有限公司 | Monitoring system capable of displaying temperature rise of cable head on site |
| CN104501990A (en) * | 2014-12-29 | 2015-04-08 | 河海大学常州校区 | Online monitoring system of cable connector temperature rise |
| CN105823574A (en) * | 2016-05-18 | 2016-08-03 | 云南电网有限责任公司昆明供电局 | Wireless temperature measurement device for monitoring temperature of arm contact of circuit breaker |
| CN106327842A (en) * | 2016-10-26 | 2017-01-11 | 杭州欣美成套电器制造有限公司 | Ring main unit temperature and current wireless collection device and collection method |
| CN106327842B (en) * | 2016-10-26 | 2022-04-05 | 杭州电力设备制造有限公司 | Looped netowrk cabinet temperature and current wireless acquisition device and acquisition method thereof |
| 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 |
| CN108398617A (en) * | 2018-02-12 | 2018-08-14 | 江苏师范大学 | A kind of detection of super-pressure electrical body failure and transmitting device and detection method |
| CN111024160A (en) * | 2019-12-25 | 2020-04-17 | 四川瑞霆电力科技有限公司 | Acquisition method and system suitable for temperature and humidity online monitoring signals of cable core of power distribution cable connector |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130814 |