CN102759409A - Online monitoring device for temperature of contact arms of high-voltage circuit breaker of 10-KV high-current switch cabinet - Google Patents
Online monitoring device for temperature of contact arms of high-voltage circuit breaker of 10-KV high-current switch cabinet Download PDFInfo
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- CN102759409A CN102759409A CN2012102414892A CN201210241489A CN102759409A CN 102759409 A CN102759409 A CN 102759409A CN 2012102414892 A CN2012102414892 A CN 2012102414892A CN 201210241489 A CN201210241489 A CN 201210241489A CN 102759409 A CN102759409 A CN 102759409A
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Abstract
The invention discloses an online monitoring device for temperature of contact arms of a high-voltage circuit breaker of a 10-KV 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 the power supply conversion panel is installed on the contact arms; 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 stabilizing circuit, consisting of a current-limiting resistor and a high-power wide-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 work 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 present invention relates to isolating switch contact arm monitoring device, specifically be meant 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 all 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.The dynamic and static contact arm contact position of isolating switch is to be prone to heat generating spot, and it is the main cause that causes that breaker temperature is too high or unusual that the loose contact of sound contact arm, contact resistance increase, the development need of accident stage, time; If fail in time to know this variation, continue operation, the contact arm heating temp surpasses setting; Then can aggravate the oxidation of dynamic and static contact arm contact position (contact), oxidation results causes contact resistance value to rise again, impels the contact arm heating so again 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 such as fingertip fusing come off, contact arm burns, degradation phenomenon under the performance of insulating material, produces 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 serious accidents such as switch blast.Isolating switch unusually then the galvanic circle then be in up-set condition; Can make appliance material temperature rising overshoot scope; Cause the decline such as physical strength and physical property of appliance material, so the temperature rise of contact arm means whether switch cubicle is in normal operation, must monitor in real time its temperature.
For the accident potential that prevents that the temperature rise of isolating switch contact arm from being produced, occur product that breaker temperature is monitored on the market, but still had some drawbacks, such as:
1, Non-contact Infrared Temperature Measurement appearance, it need know measured target size, measuring distance, the residing environment of target, and the residing environment of target has very big influence to temperature-measuring results.All can influence 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 be used for fixing the isolating switch of being installed in the formula switch cubicle and carry out thermometric; And withdraw-type switch cabinet belongs to enclosed construction, and switch cubicle is in operation and must cuts out the cabinet door, can't measure thereby not have practicality.
2, optical fiber temperature-measurement product, it has excellent electric insulating, the high pressure in can isolating switch cabinet; Therefore the temperature sensor of optical fiber connection can directly be installed on the isolating switch in the withdraw-type switch cabinet, in environment such as high voltage, big electric current, accurately measure the running temperature of isolating switch contact arm, but optical fiber temperature measurement system is complicated; Technical requirement is higher, the non-refractory environment, and there is the chance that receives contamination by dust in the optical fiber surface that is used for isolated high-voltage; Be prone to make insulativity to reduce behind the accumulation dust, this makes the application of optical fiber temperature-measurement product receive restriction 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 accurately measuring switch cabinet inner breaker contact arm temperature, the present technique scheme produces under the background then thus.
[summary of the invention]
The object of the present invention is to provide a kind of 10kV high-current switch primary cut-out contact arm temperature on-line monitoring device, 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 present invention provides following solution:
10kV high-current switch primary cut-out contact arm temperature on-line monitoring device; Comprise that current transformer, power source conversion plate, digital temperature sensor, wireless encoding transmitter module, wireless receiving decoder module, temperature show and warning device; Current transformer, power source conversion plate 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 the power source conversion plate; The power source conversion plate provides power supply for 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 in real time decoding is shown and warning device at its output terminal jointing temp; Wireless receiving decoder module, temperature show and warning device all is positioned at outside the said switch cubicle; Said power source conversion plate comprises two high-power clamp diodes, current rectifying and wave filtering circuit and the wide voltage stabilizing circuit that oppositely is connected to the current transformer output terminal; Be connected to the diode rectifier bridge of current transformer output terminal and filter capacitor that the diode rectifier bridge output terminal is connect, electrochemical capacitor constitutes current rectifying and wave filtering circuit, connects current-limiting resistance behind this current rectifying and wave filtering circuit, high-power wide voltage stabilivolt constitutes wide voltage stabilizing circuit, the DC voltage that high-power wide voltage stabilivolt two ends produce provides reliable and stable, uninterrupted direct supply for the wireless encoding transmitter module.
Above-mentioned wireless receiving decoder module can receive the coded signal of 1～200 wireless encoding transmitter module.
After adopting technique scheme, the present invention has following beneficial effect:
1, the present invention gives the wireless encoding transmitter module through power source conversion Plate supplying working power after being contained in the current transformer induction current on each phase contact arm; It has the function of obtaining power supply voluntarily; The power source conversion plate has clamping circuit, current rectifying and wave filtering circuit, wide voltage stabilizing circuit, has guaranteed to provide voluntarily reliable and stable uninterrupted power source, for the required WV 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 brought; Realize passively, and power source conversion plate of the present invention has the low characteristics of heating, and the true influence of the temperature of digital temperature sensor induction is little;
2, the digital temperature sensor of the present invention's employing is close to each phase contact arm installation; Measurement point is prone to heat generating spot nearby, can respond to the contact arm temperature variation in real time, and thermometric quick and precisely; The interference performance of wireless encoding transmitter module high temperature resistance, high voltage, electromagnetic environment is strong; The temperature data that reads digital temperature sensor after encoding through 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 isolation that insulate is good; The high pressure of avoiding wired connection to bring is scurried into danger, and wireless transmission data is accurate, reliability is high;
3, the present invention is installed in digital temperature sensor, wireless encoding transmitter module etc. on the contact arm of each phase, does not influence original phase insulation distance, and 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 some multiple spot being received; (almost simultaneously) receives the coded signal that reaches 200 wireless encoding transmitter modules and decodes one by one at short notice; Realize multiple single the receipts; Effect is high, saves the input cost of wireless receiving decoder module in a large number, remarkable in economical benefits.
[description of drawings]
Fig. 1 is the structured flowchart of preferred embodiment of the present invention;
Fig. 2 is that the present invention is arranged at the installation diagram on each phase contact arm;
Fig. 3 is the circuit theory diagrams of the power source conversion plate among the present invention.
[embodiment]
See also Fig. 1,2, shown in 3; 10kV high-current switch primary cut-out contact arm temperature on-line monitoring device comprises that current transformer T1, power source conversion plate 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 source conversion plate 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 through high temperature wire 2 with power source conversion plate 3; (40A～1000A) changes into secondary current to current transformer T1 through the induction primary current; Output AC voltage 12VAC～3.2VAC gives the change-over circuit plate 3 power supplies; Digital temperature sensor 4 is connected with power source conversion plate 3 through power lead, and power source conversion plate 3 provides power supply for wireless encoding transmitter module 5.
Said current transformer T1 is the punching micropower current transformer that iron-based nano microcrystalline soft magnetic material is processed; Power source conversion plate 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.
Power source conversion plate 3 comprises clamping circuit, current rectifying and wave filtering circuit and wide voltage stabilizing circuit.Clamping circuit is made up of the high-power clamp diode D1 that oppositely is connected to current transformer T1 output terminal, high-power clamp diode D2; When big electric current with alternating voltage control within the specific limits; The rectifier bridge D0 that constitutes by four diodes; Alternating current is transformed into Rectified alternating current output, and the input end of rectifier bridge D0 is connected to current transformer T1 output terminal, and filtering is made up of filter capacitor, electrochemical capacitor; Rectifier bridge D0 output termination filter capacitor C1, electrochemical capacitor C2; Wide voltage stabilizing circuit is made up of current-limiting resistance R1 and high-power wide voltage stabilivolt D3, meets current-limiting resistance R1, high-power wide voltage stabilivolt D3 behind this current rectifying and wave filtering circuit, and the DC voltage that high-power wide voltage stabilivolt D3 two ends produce provides reliable and stable, uninterrupted direct supply for wireless encoding transmitter module 5.
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, helps conserve space.
When voltage during greater than 12VAC; Two high-power stabilivolt D1, D2 alternate conduction; The magnitude of voltage clamper is in 12VAC, and when voltage was positioned at 12VAC～3.2VAC, high-power stabilivolt D1, D2 were because of by inoperative; 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 through data line, and wireless encoding transmitter module 5 reads the temperature data of digital temperature sensor 4 automatically at setting-up time, and after encoding, transfers out through Wireless transmission mode.
Be positioned at that Control Room outside the high-current switch then is equipped with a cover wireless receiving decoder module 6, temperature shows 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 was the temperature coded signal wireless transmit on the corresponding contact arm 1, wireless receiving decoder module 6 received corresponding signal with decoding, through being presented at after the decoding on temperature demonstration and the warning device 7; Device is compared through the predefined alarm temperature electric quantity signal of its built-in single-chip microcomputer in real time; When the temperature of contact arm 1 low during preset value, device is not worked, in case when the temperature of contact arm 1 is higher than preset value; Device is reported to the police; As long as have a contact arm overheating problem to occur in every upper and lower each three acting arm of switch cubicle three-phase, device can indicate concrete overtemperature trouble spot, and device is reported to the police; The present invention can be in a Control Room a cover wireless receiving decoder module 6, temperature shows with warning device 7 on reach monitoring many places high-current switch, therefore realized multiple single function of receiving.
Wireless encoding transmitter module 5 belongs to super low-power consumption micropower module, and 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 various parameters such as digital sensor type can be worked in 2.1～3.6VDC voltage range; Be merely 14mA in 10dBm emission power consumption, can not produce and disturb, and when high-current switch normally moves, can carry out wireless transmit effectively reliably the operation of other electronic equipment; Wireless receiving decoder module 6 and temperature show the civil power 220VAC that links to each other with warning device 7; And with warning device 7 working power is provided 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, adopts high-performance radio-frequency chip S14432; Adopt the error correction and detection coding that interweaves of circulation efficiently; Anti-interference and highly sensitive, module provides the selection of a plurality of channels, but online modification serial ports speed; Various parameters such as radio frequency speed can be accomplished multiple single the receipts.
The present invention is applicable to big electric current withdraw-type of 10kV or fixed switch cubicle 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 that current transformer, power source conversion plate, digital temperature sensor, wireless encoding transmitter module, wireless receiving decoder module, temperature show and warning device; Current transformer, power source conversion plate 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 the power source conversion plate; The power source conversion plate provides power supply for 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 in real time decoding is shown and warning device at its output terminal jointing temp; Wireless receiving decoder module, temperature show and warning device all is positioned at outside the said switch cubicle; It is characterized in that: said power source conversion plate comprises two high-power clamp diodes, current rectifying and wave filtering circuit and the wide voltage stabilizing circuit that oppositely is connected to the current transformer output terminal; Be connected to the diode rectifier bridge of current transformer output terminal and filter capacitor that the diode rectifier bridge output terminal is connect, electrochemical capacitor constitutes current rectifying and wave filtering circuit, connects current-limiting resistance behind this current rectifying and wave filtering circuit, high-power wide voltage stabilivolt constitutes wide voltage stabilizing circuit, the DC voltage that high-power wide voltage stabilivolt two ends produce provides reliable and stable, uninterrupted direct supply for the wireless encoding transmitter module.
2. 10kV high-current switch primary cut-out contact arm temperature on-line monitoring device according to claim 1, it is characterized in that: said wireless receiving decoder module can receive the coded signal of 1～200 wireless encoding transmitter module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102414892A CN102759409A (en) | 2012-07-07 | 2012-07-07 | Online monitoring device for temperature of contact arms of high-voltage circuit breaker of 10-KV high-current switch cabinet |
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| CN2012102414892A CN102759409A (en) | 2012-07-07 | 2012-07-07 | Online monitoring device for temperature of contact arms of high-voltage circuit breaker of 10-KV high-current switch cabinet |
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| CN102759409A true CN102759409A (en) | 2012-10-31 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103411692A (en) * | 2013-08-09 | 2013-11-27 | 南京大全自动化科技有限公司 | Temperature measuring device for circuit breaker contact |
| CN103499395A (en) * | 2013-10-18 | 2014-01-08 | 国家电网公司 | Self-induction high-voltage contact wireless temperature-measuring method and device |
| CN103542888A (en) * | 2013-09-27 | 2014-01-29 | 珠海鼎日电子科技有限公司 | Temperature and current online monitoring device of power equipment |
| CN103680104A (en) * | 2014-01-03 | 2014-03-26 | 国家电网公司 | Power data transmission system |
| CN104792427A (en) * | 2015-04-17 | 2015-07-22 | 厦门Abb开关有限公司 | Open type large-current contact arm temperature measurement device |
| CN106989830A (en) * | 2017-05-22 | 2017-07-28 | 河南森源电气股份有限公司 | A kind of contact of breaker temperature measuring equipment |
| CN107631808A (en) * | 2017-09-07 | 2018-01-26 | 郑州华力信息技术有限公司 | Temperature of high-tension switch cabinet inspection warning system extremely |
| CN108957219A (en) * | 2018-06-14 | 2018-12-07 | 山东卓尔电气有限公司 | A kind of fuse switch on-line fault monitoring method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104792427A (en) * | 2015-04-17 | 2015-07-22 | 厦门Abb开关有限公司 | Open type large-current contact arm temperature measurement device |
| CN106989830A (en) * | 2017-05-22 | 2017-07-28 | 河南森源电气股份有限公司 | A kind of contact of breaker temperature measuring equipment |
| CN107631808A (en) * | 2017-09-07 | 2018-01-26 | 郑州华力信息技术有限公司 | Temperature of high-tension switch cabinet inspection warning system extremely |
| CN108957219A (en) * | 2018-06-14 | 2018-12-07 | 山东卓尔电气有限公司 | A kind of fuse switch on-line fault monitoring method and device |
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Application publication date: 20121031 |