CN202757697U - Online monitoring device for temperature of contact arms of high-voltage circuit breaker of 10kV high-current switch cabinet - Google Patents
Online monitoring device for temperature of contact arms of high-voltage circuit breaker of 10kV high-current switch cabinet Download PDFInfo
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- CN202757697U CN202757697U CN201220338185.3U CN201220338185U CN202757697U CN 202757697 U CN202757697 U CN 202757697U CN 201220338185 U CN201220338185 U CN 201220338185U CN 202757697 U CN202757697 U CN 202757697U
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Abstract
The utility model discloses an online monitoring device for temperature of contact arms of a high-voltage circuit breaker of a 10kV high-current switch cabinet. The online monitoring device comprises a power supply conversion panel, a current transformer, a digital temperature sensor, a wireless encoding and transmitting module as well as a wireless receiving and decoding module and a temperature display and alarm device, wherein one power supply conversion panel is installed on the contact arm of each phase; the current transformer supplies power to the power conversion panel; the wireless receiving and decoding module and the temperature display and alarm device are located outside the switch cabinet; the wireless encoding and transmitting module is used for reading temperature data of the digital temperature sensor, processing the temperature data into an encoded signal and wirelessly transmitting the signal; the wireless receiving and decoding module for receiving and decoding codes is connected with the temperature display and alarm device; the power supply conversion panel comprises two high-power clamping diodes which are in reverse parallel connection with an output end of the current transformer, and a rectifier filter circuit which is in parallel connection with the output end of the current transformer; and the rectifier filter circuit is connected with a wide-voltage voltage stabilizing circuit consisting of a current-limiting resistor and a high-power wide-voltage voltage stabilizing tube. According to the online monitoring device for temperature of the contact arm of the high-voltage circuit breaker of the 10-KV high-current switch cabinet, the electricity is obtained by sensing, a working power supply obtained by the device itself is stable and reliable and the uninterrupted passive power supplying for the wireless encoding and transmitting module is realized.
Description
[technical field]
The utility model relates to the circuit breaker contact arm monitoring device, specifically refers to a kind of 10kV high-current switch primary cut-out contact arm temperature on-line monitoring device.
[background technology]
Monitoring to the power equipment temperature is a very important problem of studying both at home and abroad at present, withdraw-type switch cabinet has extensive application in power supply, electricity consumption department, isolating switch is one of critical component of switch cubicle assurance electrical power trans mission/distribution system safe and reliable operation, whether normal operation of circuit breaker is concerning the stability of electric system, and the accident that causes because of circuit breaker failure has been put into one of 18 great anti-accident measures of electrical network of State Grid Corporation of China.Moving of isolating switch, stationary contact knee-joint synapsis is easy heat generating spot, the loose contact of sound contact arm, it is the main cause that causes that breaker temperature is too high or unusual that contact resistance increases, stage of the development need of accident, time, if fail in time to know this variation, continue operation, the contact arm heating temp surpasses setting, then can aggravate to move, the oxidation of stationary contact knee-joint synapsis (contact), oxidation results causes again contact resistance value to rise, impel so again the contact arm heating and further temperature rise, and withdraw-type switch cabinet has sealing and does not dispel the heat, and produces vicious cycle, if untimely control, the temperature rise problem that exceeds standard is constantly aggravated, then can occur coming off such as fingertip fusing, contact arm burns, the phenomenons such as the hydraulic performance decline of insulating material produce effluve, generate a large amount of charged ions, cause short circuit to cause equipment burnout, cause power failure, last even can be on fire and accidents caused, seriously cause the serious accidents such as switch blast.Isolating switch unusually then galvanic circle then is in up-set condition, the appliance material temperature is raise exceed specialized range, cause the declines such as the physical strength of appliance material and physical property, so the temperature rise of contact arm means whether switch cubicle is in normal operation, must carry out Real-Time Monitoring to its temperature.
For the accident potential that prevents that the circuit breaker contact arm temperature rise from producing, occur product that breaker temperature is monitored on the market, but still had some drawbacks, such as:
1, Non-contacting Infrared Thermometer, it need to know measured target size, measuring distance, the residing environment of target, and the residing environment of target has a significant impact temperature-measuring results.All can affect the thermometric value under too high when environment temperature, as to have dust, smog and the steam condition, and can't see through cabinet and measure internal unit, therefore can only specific aim carry out thermometric for the isolating switch of installing in the fixed switching cabinet, and withdraw-type switch cabinet belongs to enclosed construction, switch cubicle is in operation and must cuts out the cabinet door, can't measure thereby without practicality.
2, the optical fiber temperature-measurement product, it has good electrical insulating property, high pressure in can isolating switch cabinet, therefore the temperature sensor of optical fiber connection can directly be installed on the interior isolating switch of withdraw-type switch cabinet, at high voltage, the running temperature of Measurement accuracy circuit breaker contact arm in the environment such as large electric current, but optical fiber temperature measurement system is complicated, technical requirement is higher, the non-refractory environment, there is the chance that is subject to contamination by dust in the optical fiber surface that is used for isolated high-voltage, behind the accumulation dust insulativity is reduced, and this is so that the optical fiber temperature-measurement product is used the restriction that is subject to a certain degree, in addition, temperature sensor adopts active design, must use battery, and hidden peril of explosion is arranged, and the installation for measurement point is inconvenient, and withdraw-type switch cabinet can not be changed battery at charging operation.
In view of this, need a kind of can Measurement accuracy switch cubicle inner breaker contact arm temperature, the technical program produces under the background then thus.
[utility model content]
The purpose of this utility model is to provide a kind of 10kV high-current switch primary cut-out contact arm temperature on-line monitoring device, and this device adopts the induction power taking, and the working power that obtains voluntarily is reliable and stable and uninterrupted.
For realizing above-mentioned technical assignment, the utility model provides following solution:
10kV high-current switch primary cut-out contact arm temperature on-line monitoring device, comprise current transformer, power conversion board, digital temperature sensor, the wireless encoding transmitter module, the wireless receiving decoder module, temperature shows and warning device, current transformer, power conversion board and wireless encoding transmitter module all are installed on each mutually on the contact arm, the current transformer induction is obtained electric current and is provided secondary voltage to power conversion board, power conversion board provides power supply to the wireless encoding transmitter module, each phase contact arm all is glued with digital temperature sensor in the contact arm end at contiguous its plum blossom pawl head place, the wireless encoding transmitter module reads the temperature data of digital temperature sensor and is processed into coded signal to be launched with wireless mode, be used for received encoded signal and the wireless receiving decoder module of signal real-time decoding is shown and warning device at its output terminal jointing temp, the wireless receiving decoder module, temperature shows and warning device all is positioned at outside the described switch cubicle, described power conversion board comprises two high-power clamp diodes that oppositely are connected to the current transformer output terminal, current rectifying and wave filtering circuit and wide voltage stabilizing circuit, be connected to the diode rectifier bridge of current transformer output terminal and the filter capacitor that the diode rectifier bridge output terminal connects, electrochemical capacitor consists of current rectifying and wave filtering circuit, connect current-limiting resistance behind this current rectifying and wave filtering circuit, high-power wide voltage stabilivolt consists of wide voltage stabilizing circuit, and the DC voltage that high-power wide voltage stabilivolt two ends produce provides reliable and stable to the wireless encoding transmitter module, uninterrupted direct supply.
Above-mentioned wireless receiving decoder module can receive the coded signal of 1～200 wireless encoding transmitter module.
After adopting technique scheme, the utlity model has following beneficial effect:
1, the utility model is to supply working power to the wireless encoding transmitter module by power conversion board after being contained in the current transformer induction current on each phase contact arm, it has the function of obtaining voluntarily power supply, power conversion board has clamping circuit, current rectifying and wave filtering circuit, wide voltage stabilizing circuit, guaranteed to provide voluntarily reliable and stable uninterrupted power source, for the required operating voltage of wireless encoding transmitter module is created reliable and stable condition of power supply, stopped in high-current switch, to install the risk hidden danger that battery brings, realize passive, and power conversion board of the present utility model has the low characteristics of heating, and the true impact of the temperature of digital temperature sensor induction is little;
2, the digital temperature sensor that the utility model adopts is close to each phase contact arm and is installed, measurement point is easy heat generating spot nearby, can respond in real time the contact arm temperature variation, thermometric quick and precisely, wireless encoding transmitter module high temperature resistance, high voltage, the interference performance of electromagnetic environment is strong, the temperature data that reads digital temperature sensor is encoded rear by the communication of wireless signal mode, so can solve the wireless encoding transmitter module and and the wireless receiving decoder module between the height voltage transmission, the insulation isolation is good, the high pressure of avoiding wired connection to bring is scurried into danger, and the data of wireless transmission are accurate, reliability is high;
3, the utility model is installed in digital temperature sensor, wireless encoding transmitter module etc. on the contact arm of each phase, do not affect original phase insulation distance, compact conformation has ensured the original insulating property of primary cut-out in the high-current switch, long service life;
4, the wireless receiving decoder module can be realized a bit multipoint reception, (almost simultaneously) receives the coded signal that reaches 200 wireless encoding transmitter modules and decodes one by one at short notice, realize multiple illuminators and single receiver, effect is high, a large amount of input costs of saving the wireless receiving decoder module, remarkable in economical benefits.
[description of drawings]
Fig. 1 is the structured flowchart of the utility model preferred embodiment;
Fig. 2 is that the utility model is arranged at the installation diagram on each phase contact arm;
Fig. 3 is the circuit theory diagrams of the power conversion board in the utility model.
[embodiment]
See also shown in Fig. 1,2,3,10kV high-current switch primary cut-out contact arm temperature on-line monitoring device comprises that current transformer T1, power conversion board 3, digital temperature sensor 4, wireless encoding transmitter module 5, wireless receiving decoder module 6, temperature show and warning device 7.
Current transformer T1, power conversion board 3, wireless encoding transmitter module 5 all are installed on each phase contact arm 1, and each phase contact arm 1 all is glued with digital temperature sensor 4 in the contact arm end at contiguous its plum blossom pawl head 10 places.Current transformer T1 is connected by high temperature wire 2 with power conversion board 3, (40A～1000A) changes into secondary current to current transformer T1 by the induction primary current, output AC voltage 12VAC～3.2VAC is to 3 power supplies of change-over circuit plate, digital temperature sensor 4 is connected with power conversion board 3 by power lead, and power conversion board 3 provides power supply for wireless encoding transmitter module 5.
Described current transformer T1 is the punching micropower current transformer that iron-based nano microcrystalline soft magnetic material is made; Power conversion board 3 can satisfy primary current works under the condition of 40A～1000A wide variation reliably and with long-term, and can bear the impact short-circuit current that the primary circuit electric current reaches 3000A.
The power of high-power clamp diode D1, high-power clamp diode D2 is 5W, and the power of high-power wide voltage stabilivolt D3 is 1W, and the volume of the miniaturization all volume with the same specification diode is suitable, is conducive to conserve space.
When voltage during greater than 12VAC, two high-power voltage-stabilizing tube D1, D2 alternate conduction, the magnitude of voltage clamper is in 12VAC, when voltage is positioned at 12VAC～3.2VAC, high-power voltage-stabilizing tube D1, D2 are inoperative because of cut-off, high-power wide voltage stabilivolt D3 work provides stable, continual 3.2DC DC voltage to 5 power supplies of wireless encoding transmitter module to satisfy.
This wireless encoding transmitter module 5 directly connects digital temperature sensor 4 by data line, and wireless encoding transmitter module 5 reads the temperature data of digital temperature sensor 4 automatically at setting-up time, and transfers out through the mode by wireless transmission behind the coding.
The Control Room that is positioned at outside the high-current switch then is equipped with a cover wireless receiving decoder module 6, temperature demonstration and warning device 7, the output terminal jointing temp of wireless receiving decoder module 6 shows and warning device 7 that wherein wireless receiving decoder module 6 is used for the temperature coded signal is decoded.
After wireless encoding transmitter module 5 is the temperature coded signal wireless transmit on the corresponding contact arm 1, wireless receiving decoder module 6 receives corresponding signal with decoding, through being presented at after the decoding on temperature demonstration and the warning device 7, device is compared in real time by the predefined alarm temperature electric quantity signal of its built-in single-chip microcomputer, when the temperature of contact arm 1 low during preset value, device is not worked, when in case the temperature of contact arm 1 is higher than preset value, device is reported to the police, on every switch cubicle three-phase, as long as have a contact arm overheating problem to occur in lower each three acting arm, device can indicate concrete overtemperature trouble spot, device is reported to the police, the utility model can be in a Control Room a cover wireless receiving decoder module 6, reach monitoring many places high-current switch on temperature demonstration and the warning device 7, therefore realized the multiple illuminators and single receiver function.
Wireless encoding transmitter module 5 belongs to super low-power consumption micropower module, this module provides the selection of a plurality of channels, but online modification serial ports speed, transmitting-receiving frequency, emissive power, radio frequency speed, transmission interval, and the various parameters such as digital sensor type, can in 2.1～3.6VDC voltage range, work, launching power consumption at 10dBm only is 14mA, can not produce the operation of other electronic equipment and disturb, and can carry out effectively reliably wireless transmit when high-current switch normally moves; Wireless receiving decoder module 6 and temperature show the civil power 220VAC that links to each other with warning device 7, and provide working power with warning device 7 after overcommutation, filtering, voltage stabilizing, for wireless receiving decoder module 6, temperature demonstration, wireless receiving decoder module 6 is highly integrated half-duplex micropower modules, adopt high-performance radio-frequency chip S14432, adopt the efficient error correction and detection coding that interweaves that circulates, anti-interference and highly sensitive, module provides the selection of a plurality of channels, but online modification serial ports speed, the various parameters such as radio frequency speed can be finished multiple illuminators and single receiver.
The utility model is applicable to the large electric current withdraw-type of 10kV or fixed switching cabinet primary cut-out contact arm monitoring temperature field.
Claims (2)
1.10kV high-current switch primary cut-out contact arm temperature on-line monitoring device, comprise current transformer, power conversion board, digital temperature sensor, the wireless encoding transmitter module, the wireless receiving decoder module, temperature shows and warning device, current transformer, power conversion board and wireless encoding transmitter module all are installed on each mutually on the contact arm, the current transformer induction is obtained electric current and is provided secondary voltage to power conversion board, power conversion board provides power supply to the wireless encoding transmitter module, each phase contact arm all is glued with digital temperature sensor in the contact arm end at contiguous its plum blossom pawl head place, the wireless encoding transmitter module reads the temperature data of digital temperature sensor and is processed into coded signal to be launched with wireless mode, be used for received encoded signal and the wireless receiving decoder module of signal real-time decoding is shown and warning device at its output terminal jointing temp, the wireless receiving decoder module, temperature shows and warning device all is positioned at outside the described switch cubicle, it is characterized in that: described power conversion board comprises two high-power clamp diodes that oppositely are connected to the current transformer output terminal, current rectifying and wave filtering circuit and wide voltage stabilizing circuit, be connected to the diode rectifier bridge of current transformer output terminal and the filter capacitor that the diode rectifier bridge output terminal connects, electrochemical capacitor consists of current rectifying and wave filtering circuit, connect current-limiting resistance behind this current rectifying and wave filtering circuit, high-power wide voltage stabilivolt consists of wide voltage stabilizing circuit, and the DC voltage that high-power wide voltage stabilivolt two ends produce provides reliable and stable to the wireless encoding transmitter module, uninterrupted direct supply.
2. 10kV high-current switch primary cut-out contact arm temperature on-line monitoring device according to claim 1, it is characterized in that: described wireless receiving decoder module can receive the coded signal of 1～200 wireless encoding transmitter module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220338185.3U CN202757697U (en) | 2012-07-07 | 2012-07-07 | Online monitoring device for temperature of contact arms of high-voltage circuit breaker of 10kV high-current switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220338185.3U CN202757697U (en) | 2012-07-07 | 2012-07-07 | Online monitoring device for temperature of contact arms of high-voltage circuit breaker of 10kV high-current switch cabinet |
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| CN202757697U true CN202757697U (en) | 2013-02-27 |
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| CN201220338185.3U Expired - Fee Related CN202757697U (en) | 2012-07-07 | 2012-07-07 | Online monitoring device for temperature of contact arms of high-voltage circuit breaker of 10kV high-current switch cabinet |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759409A (en) * | 2012-07-07 | 2012-10-31 | 嵊州市电力公司 | Online monitoring device for temperature of contact arms of high-voltage circuit breaker of 10-KV high-current switch cabinet |
| CN103630732A (en) * | 2013-11-19 | 2014-03-12 | 杭州休普电子技术有限公司 | Isolation passive high-voltage electrified indication device |
| CN106441618A (en) * | 2016-09-28 | 2017-02-22 | 国网江苏省电力公司电力科学研究院 | Contact type passive wireless monitor for abnormal heating of through-flow loop of high-voltage disconnecting switch |
| CN107063494A (en) * | 2017-06-09 | 2017-08-18 | 贵州电网有限责任公司电力科学研究院 | Primary cut-out temperature online monitoring system based on radio communication |
-
2012
- 2012-07-07 CN CN201220338185.3U patent/CN202757697U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759409A (en) * | 2012-07-07 | 2012-10-31 | 嵊州市电力公司 | Online monitoring device for temperature of contact arms of high-voltage circuit breaker of 10-KV high-current switch cabinet |
| CN103630732A (en) * | 2013-11-19 | 2014-03-12 | 杭州休普电子技术有限公司 | Isolation passive high-voltage electrified indication device |
| CN103630732B (en) * | 2013-11-19 | 2015-10-28 | 杭州休普电子技术有限公司 | Isolated passive high voltage charge indicating device |
| CN106441618A (en) * | 2016-09-28 | 2017-02-22 | 国网江苏省电力公司电力科学研究院 | Contact type passive wireless monitor for abnormal heating of through-flow loop of high-voltage disconnecting switch |
| CN107063494A (en) * | 2017-06-09 | 2017-08-18 | 贵州电网有限责任公司电力科学研究院 | Primary cut-out temperature online monitoring system based on radio communication |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG ELECTRIC POWER COMPANY SHAOXING POWER BUR Effective date: 20130605 Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: SHENGZHOU ELECTRIC POWER COMPANY Effective date: 20130605 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 312400 SHAOXING, ZHEJIANG PROVINCE TO: 100031 XICHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130605 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: Zhejiang Electric Power Company Patentee after: Shaoxing Power Bureau Patentee after: Shengzhou Electric Power Company Address before: Zhejiang province Shengzhou City Ring Road 312400 to Lake Street No. 18 Patentee before: Shengzhou Electric Power Company |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130227 Termination date: 20150707 |
|
| EXPY | Termination of patent right or utility model |