CN202770558U - Device and system for monitoring temperature of breaker contact based on carrier communication - Google Patents
Device and system for monitoring temperature of breaker contact based on carrier communication Download PDFInfo
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- CN202770558U CN202770558U CN201220383969.8U CN201220383969U CN202770558U CN 202770558 U CN202770558 U CN 202770558U CN 201220383969 U CN201220383969 U CN 201220383969U CN 202770558 U CN202770558 U CN 202770558U
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Abstract
The utility model relates to the technical field of electric power and particularly relates to a device and a system for monitoring the temperature of a breaker contact based on carrier communication. The device comprises a temperature sensor for monitoring the temperature of a breaker contact, a singlechip for converting the temperature signal into a digital signal and transmitting the digital signal to a carrier module, and a carrier module for coupling the digital temperature signal to a power line and sending out the signal through the power line. According to the embodiments of the utility model, the temperature information of a breaker contact can be sent out in real time in the form of power line carriers, so that the state of the breaker can be monitored conveniently. Meanwhile, the safe operation of the electrical network is maintained. Since signals are transmitted in the form of power line carriers, the communication cost is lowered. Meanwhile, the signal transmission is more reliable.
Description
Technical field
The utility model is relevant for the power technology field, particularly about a kind of contact of breaker device for monitoring temperature and system based on carrier communication.
Background technology
In recent years, the development intelligent grid has risen to the national strategy aspect, becomes the important component part of national economic development and energy policy.Intelligent grid the construction object of adapted electrical domain require we can provide efficiently, reliably, can communicate by letter and the intelligent electrical apparatus equipment of networking.
Isolating switch is as most important control element in the electric system, and its intelligentized basis is the high reliability of components and parts, principal organ.The market demand of isolating switch is huge, present about about 2,400 ten thousand covers of 600,000 covers, breaker of plastic casing of year Demand Frame isolating switch of China for example, if wherein 50% need to upgrade to follow-only, more than 1,000 ten thousand intelligent frame circuit breakers just need to be arranged.Therefore, not only technically, and on the market demand, this project is meaning and the application prospect of own profound all, and the intelligent grid construction of current China is also played very large promotion and facilitation.
Considerable part is arranged with overheated relevant in the reason that electricity substation has an accident, one of be exactly that the primary cut-out contact temperature is too high.Because the contact of isolating switch is in noble potential, whenever relatively and not all has very high voltage between the homophase, so the temperature detection of the contact of isolating switch is a difficult problem of electric system always.
The domestic research that has for contact temperature measurement aspect, for example the king advances the application of temperature sensor contact welding is monitored; The Wu Lenan of Southeast China University is just studying the on-line monitoring of high-voltage switch gear contact temperature; A kind of fluorescent optical fiber temperature sensor that is applied to the switch cabinet contact temperature on-line monitoring is just being studied by Xi'an Heqi Optoelectronic Technology Co., Ltd..
Some famous major companies release the intelligent type low-voltage circuit breaker of " can communicate by letter " at present just one after another in the world, for example the technical feature of the isolating switch SENTRON WL/VL of Siemens Company's release had had large increase than former product, especially aspect network connection, have the multiple bus interfaces such as Profibus2DP, Cubicle BUS, Ethernet, RS-232C, provide convenience for realizing Networked Supervising; The Masterpct Series Circuit Breakers of Schneider company is supported Modbus and BatiBUS bus, and the external mixed-media network modules mixed-media that is used for connecting Profibus and Ethernet also is provided simultaneously.
For the communication of breaker contact point temperature measurement signal, be 1200 meters if usually utilize RS485, maximum unrepeatered transmission distance, when surpassing 1200 meters, need to add repeater (maximum 8) regenerated signal, to realize telecommunication.The factors such as but load RS485 equipment is many, wire diameter is meticulous, the converter quality is bad, equipment lightning protection complexity all can reduce communication efficiency.
The utility model content
Isolating switch contact temperature signal transmits the problem of inconvenience in the prior art in order to solve, and has proposed a kind of contact of breaker device for monitoring temperature and system based on carrier communication.
The utility model provides a kind of contact of breaker device for monitoring temperature based on carrier communication, comprises,
Temperature sensor, single-chip microcomputer, carrier module,
The temperature of described temperature sensor monitors contact of breaker, described single-chip microcomputer is converted to digital signal with temperature signal and sends described carrier module to, and described carrier module is coupled to the temperature signal of digital form on the line of electric force, sends out by described line of electric force.
A further aspect according to the described device of the utility model embodiment, described single-chip microcomputer also comprises amplifying circuit, filtering circuit, shaping circuit and A/D convertor circuit, described amplifying circuit amplifies temperature signal, send described filtering circuit to and carry out filtering, described filtering circuit sends temperature signal to shaping that shaping circuit carries out temperature signal, and described A/D convertor circuit is converted to digital signal with described temperature signal.
Another further aspect according to the described device of the utility model embodiment, described carrier module further comprises, the carrier modulation demodulation chip, filtering amplitude limiter circuit and coupled circuit, described carrier modulation chip is connected with described filtering amplitude limiter circuit, and described filtering amplitude limiter circuit is connected with described coupled circuit.
According to another further aspect of the described device of the utility model embodiment, described coupled circuit is connected with power circuit by the connected mode of phase line-ground wire.
Embodiment of the present utility model also provides a kind of contact of breaker temperature monitoring system, comprises,
A plurality of aforesaid supervising devices, line of electric force, monitor terminal;
Described supervising device obtains the temperature signal of contact of breaker, sends temperature signal to monitor terminal in the mode of carrier communication by line of electric force.
A further aspect according to the described system of the utility model embodiment, described monitor terminal further comprises carrier module, data processing unit, data storage cell, display unit, described carrier module is connected with described data processing unit, and described data storage cell is connected with described data processing unit, and described data processing unit is connected with described display unit.
Another further aspect according to the described system of the utility model embodiment, the carrier module of described monitor terminal further comprises coupled circuit, the filtering amplitude limiter circuit, the carrier modulation demodulation chip, described coupled circuit is connected with line of electric force, described filtering amplitude limiter circuit is connected with described coupled circuit, and described filtering amplitude limiter circuit is connected with the carrier modulation demodulation chip.
According to another further aspect of the described system of the utility model embodiment, the coupled circuit of described supervising device all is connected with power circuit by the connected mode of phase line-ground wire with the coupled circuit of monitor terminal.
By embodiment of the present utility model, mode that can be by power carrier is with real-time the spreading out of of the temperature information of breaker contact point, make things convenient for the monitoring breaker state, safeguard the safe operation of electrical network, and the mode transmission of signal by using power carrier can be so that communications cost be cheap, and relatively more reliable.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of a kind of contact of breaker device for monitoring temperature based on carrier communication that Figure 1 shows that the utility model embodiment
The hardware that Figure 2 shows that a kind of monitor terminal of the utility model forms schematic diagram;
Figure 3 shows that the structural representation of a kind of contact of breaker temperature monitoring system of the utility model embodiment;
Figure 4 shows that the structural representation of the utility model embodiment line-ground coupled circuit.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
The structural scheme of mechanism of a kind of contact of breaker device for monitoring temperature based on carrier communication that is illustrated in figure 1 as the utility model embodiment.
The temperature of described temperature sensor 101 monitoring breaker contacts, described single-chip microcomputer 102 is converted to digital signal with temperature signal and sends described carrier module 103 to, described carrier module 103 is coupled to the temperature signal of digital form on the line of electric force, sends out by described line of electric force.
Described single-chip microcomputer 102 also comprises amplifying circuit 1021, filtering circuit 1022, shaping circuit 1023 and A/D convertor circuit 1024, described amplifying circuit 1021 amplifies temperature signal, send described filtering circuit 1022 to and carry out filtering, described filtering circuit 1022 sends temperature signal to shaping circuit 1023 and carries out the shaping of temperature signal, and described A/D convertor circuit 1024 is converted to digital signal with described temperature signal.
Described carrier module 103 further comprises, carrier modulation demodulation chip 1031, filtering amplitude limiter circuit 1032 and coupled circuit 1033, described carrier modulation chip 1031 is connected with described filtering amplitude limiter circuit 1032, described filtering amplitude limiter circuit 1032 is connected with described coupled circuit 1033, wherein carrier modulation demodulation chip 1031 is modulated temperature signal, what described filtering amplitude limiter circuit 1032 eliminated that the cycle occurs on the line of electric force causes the pulse of interference to temperature signal, and described coupled circuit 1033 is coupled to temperature signal on the described line of electric force.
Above-mentioned coupled circuit 1033 is connected with power circuit by the connected mode of phase line-ground wire, and wherein the connected mode of this phase line-ground wire is the less mode of a kind of power carrier signal loss, therefore preferred this connected mode in the scheme of the present utility model.
According to above-described embodiment, mode that can be by power carrier is with real-time the spreading out of of the temperature information of breaker contact point, make things convenient for the monitoring breaker state, safeguard the safe operation of electrical network, and the mode transmission of signal by using power carrier can be so that communications cost be cheap, and relatively more reliable.
Be illustrated in figure 2 as the structural representation of a kind of monitor terminal of the utility model.
Described carrier module 201 is connected with described data processing unit 202, and described data storage cell 203 is connected with described data processing unit 202, and described display unit 204 is connected with described data processing unit 202 respectively with data acquisition unit 205.
Described carrier module 201 obtains the temperature signal that the contact of breaker device for monitoring temperature based on carrier communication sends over from line of electric force, send described temperature signal to data processing unit 202, data processing unit 202 can be stored in temperature signal in the data storage cell 203, by display unit 204 temperature signal is presented on the screen, and can carry out history and relatively wait statistical computation according to being stored in temperature signal in the storage unit 203, be presented on the display unit 204.
Described data acquisition unit 205 obtains environmental information by sensors such as sound, light, electricity, sends described environmental information to described data processing unit 202.
Be illustrated in figure 3 as the structural representation of a kind of contact of breaker temperature monitoring system of the utility model embodiment.
Comprise a plurality of supervising devices 301 as shown in Figure 1, line of electric force 302, monitor terminal 303.
Described supervising device 301 obtains the temperature signal of contact of breaker, sends temperature signal to monitor terminal 303 in the mode of carrier communication by line of electric force 302.
Described monitor terminal 303 further comprises carrier module 3031, data processing unit 3032, data storage cell 3033, display unit 3034, described carrier module 3031 is connected with described data processing unit 3032, described data storage cell 3033 is connected with described data processing unit 3032, and described data processing unit 3032 is connected with described display unit 3034.
Described carrier module 3031 obtains the temperature signal that supervising device 301 sends over from line of electric force 302, send described temperature signal to data processing unit 3032, data processing unit 3032 can be stored in temperature signal in the data storage cell 3033, by display unit 3034 temperature signal is presented on the screen, and can carry out history and relatively wait statistical computation according to being stored in temperature signal in the storage unit 3033, be presented on the display unit 3034.
The carrier module 3031 of described monitor terminal 303 further comprises coupled circuit 30311, filtering amplitude limiter circuit 30312, carrier modulation demodulation chip 30313, described coupled circuit 30311 is connected with line of electric force 302, described filtering amplitude limiter circuit 30312 is connected with described coupled circuit 30311, and described filtering amplitude limiter circuit 30312 is connected with carrier modulation demodulation chip 30313; Described coupled circuit 30311 obtains the temperature signal that is coupled on the line of electric force, what described filtering amplitude limiter circuit 30312 eliminated that the cycle occurs on the line of electric force causes the pulse of interference to temperature signal, and 30313 pairs of described temperature signals of described carrier modulation demodulation chip carry out demodulation.
The coupled circuit of above-mentioned supervising device all is connected with line of electric force 302 tunnel by the connected mode of phase line-ground wire with the coupled circuit of monitor terminal 30311, wherein the connected mode of this phase line-ground wire is the less mode of a kind of power carrier signal loss, therefore preferred this connected mode in the scheme of the present utility model.
According to above-described embodiment, mode that can be by power carrier is with real-time the spreading out of of the temperature information of breaker contact point, make things convenient for the monitoring breaker state, safeguard the safe operation of electrical network, and the mode transmission of signal by using power carrier can be so that communications cost be cheap, and relatively more reliable.
In order to realize the physical separation of the weak-feedback side of transmission line that forceful electric power side and temperature sensor, carrier module etc. form, conducting high-frequency signal and blocking-up common frequency power network electric signal, realize impedance matching, when sending data, be sent to coupled circuit after the signal process power amplification filtering, be coupled on the line of electric force through coupled circuit again.When receiving steering order, the modulated spread spectrum signal of line of electric force accesses through coupled circuit.Coupled circuit further comprises pickup coil and corresponding electric capacity, and wherein electric capacity is used for filtering power frequency component and low-frequency disturbance.In coupling scheme of the present utility model, can adopt line-ground lotus root to close mode, its center line is phase line, ground refers to ground wire, perhaps can also adopt line-center line lotus root to close mode, its center line is phase line, and center line refers to the neutral line, described line-ground lotus root is closed mode and closes mode than line-center line lotus root, and power carrier signal is lost tens dB less.
Be illustrated in figure 4 as the structural representation of the utility model embodiment line-ground coupled circuit, comprise in the figure bus, trap, phase line, coupling condenser, wave filter, high frequency cable, what be connected with described high frequency cable also comprises filtering amplitude limiter circuit and carrier modulation demodulation chip.Wherein, trap is for the weak-feedback side of transmission line of isolating the compositions such as forceful electric power side and temperature sensor, carrier module.
The industrial-frequency alternating current that uses at present has 50Hz, and the cycle is 20ms, in each ac cycle, two minor peaks occur, and two minor peaks can be brought impulse disturbances twice, and the impulse disturbances of fixing 100Hz is namely arranged on the line of electric force, and interference time is 2ms approximately.Above-mentioned filtering amplitude limiter circuit can solve the fixing interference of this frequency, can adopt parallel diode, two-way transient voltage twin zener dioder, electric capacity and inductance to form a suitable shunt-resonant circuit and consist of the filtering amplitude limiter circuit, described filtering amplitude limiter circuit can adopt circuit of the prior art, repeats no more in the utility model.
Carrier modulation demodulation chip in the utility model can adopt the carrier modulation demodulation chip of spread spectrum, power line environment is a kind of abominable channel circumstance, there is much noise on the power line network of multipath, load is many, configuring condition is complicated, and the loaded work piece state is changing change when causing the line of electric force transport property to be.Line of electric force is not special-purpose communication media, and its major function is electric power transfer, and its design can not take into account the technical requirement of high-frequency communication.It is little that this is mainly reflected in the line of electric force line impedance, changes greatly, and signal attenuation is strong, and interference is large and time variation is large, exists multidiameter delay etc.Therefore data to be on line of electric force, reliably transmitted, the carrier modulation technology must be adopted.But the narrow band communication technology that in the past adopted, such as FSK, there are the defectives such as message transmission rate is low, the bit error rate is high in PSK etc., thereby its application is extremely restricted.In order to better meet the requirement of traffic rate and reliability aspect, obtained significant progress based on the power line carrier data communication technology of spread spectrum.Spread spectrum communication has the not available good victory energy of many narrow band communications as one of important means of communication, the advantage such as, anti-multipath fading low such as strong interference immunity, the bit error rate.
Pass through above-described embodiment, mode that can be by power carrier is with real-time the spreading out of of the temperature information of breaker contact point, make things convenient for the monitoring breaker state, safeguard the safe operation of electrical network, and the mode transmission of signal by using power carrier can be so that communications cost be cheap, and relatively more reliable.
Above-described embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above only is embodiment of the present utility model; and be not used in and limit protection domain of the present utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (8)
1. the contact of breaker device for monitoring temperature based on carrier communication is characterized in that comprising,
Temperature sensor, single-chip microcomputer, carrier module,
The temperature of described temperature sensor monitors contact of breaker, described single-chip microcomputer is converted to digital signal with temperature signal and sends described carrier module to, and described carrier module is coupled to the temperature signal of digital form on the line of electric force, sends out by described line of electric force.
2. device according to claim 1, it is characterized in that, described single-chip microcomputer also comprises amplifying circuit, filtering circuit, shaping circuit and A/D convertor circuit, described amplifying circuit amplifies temperature signal, send described filtering circuit to and carry out filtering, described filtering circuit sends temperature signal to shaping that shaping circuit carries out temperature signal, and described A/D convertor circuit is converted to digital signal with described temperature signal.
3. device according to claim 1 is characterized in that, described carrier module further comprises, the carrier modulation demodulation chip, filtering amplitude limiter circuit and coupled circuit, described carrier modulation chip is connected with described filtering amplitude limiter circuit, and described filtering amplitude limiter circuit is connected with described coupled circuit.
4. device according to claim 1 is characterized in that, described coupled circuit is connected with power circuit by the connected mode of phase line-ground wire.
5. a contact of breaker temperature monitoring system is characterized in that comprising,
A plurality of such as the described supervising device of claim 1-4 any one, line of electric force, monitor terminal;
Described supervising device obtains the temperature signal of contact of breaker, sends temperature signal to monitor terminal in the mode of carrier communication by line of electric force.
6. system according to claim 5, it is characterized in that, described monitor terminal further comprises carrier module, data processing unit, data storage cell, display unit, described carrier module is connected with described data processing unit, described data storage cell is connected with described data processing unit, and described data processing unit is connected with described display unit.
7. system according to claim 6, it is characterized in that, the carrier module of described monitor terminal further comprises coupled circuit, the filtering amplitude limiter circuit, the carrier modulation demodulation chip, described coupled circuit is connected with line of electric force, and described filtering amplitude limiter circuit is connected with described coupled circuit, and described filtering amplitude limiter circuit is connected with the carrier modulation demodulation chip.
8. system according to claim 5 is characterized in that, the coupled circuit of described supervising device all is connected with power circuit by the connected mode of phase line-ground wire with the coupled circuit of monitor terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220383969.8U CN202770558U (en) | 2012-08-03 | 2012-08-03 | Device and system for monitoring temperature of breaker contact based on carrier communication |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220383969.8U CN202770558U (en) | 2012-08-03 | 2012-08-03 | Device and system for monitoring temperature of breaker contact based on carrier communication |
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| CN202770558U true CN202770558U (en) | 2013-03-06 |
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| CN201220383969.8U Expired - Fee Related CN202770558U (en) | 2012-08-03 | 2012-08-03 | Device and system for monitoring temperature of breaker contact based on carrier communication |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728048A (en) * | 2013-11-15 | 2014-04-16 | 成都市宏山科技有限公司 | Optical fiber sensing temperature detection device for bus connector |
| CN103761855A (en) * | 2014-02-15 | 2014-04-30 | 福州大学 | Contact bounce and actuation time test system based on power line communication |
| CN117872889A (en) * | 2024-01-09 | 2024-04-12 | 安徽中防科技有限公司 | Intelligent civil air defense control system |
-
2012
- 2012-08-03 CN CN201220383969.8U patent/CN202770558U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103728048A (en) * | 2013-11-15 | 2014-04-16 | 成都市宏山科技有限公司 | Optical fiber sensing temperature detection device for bus connector |
| CN103761855A (en) * | 2014-02-15 | 2014-04-30 | 福州大学 | Contact bounce and actuation time test system based on power line communication |
| CN103761855B (en) * | 2014-02-15 | 2016-06-01 | 福州大学 | A kind of based on power carrier communication contact bounce and opening time test macro |
| CN117872889A (en) * | 2024-01-09 | 2024-04-12 | 安徽中防科技有限公司 | Intelligent civil air defense control system |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130306 Termination date: 20140803 |
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| EXPY | Termination of patent right or utility model |