CN203705574U - Magnetic field detection principle-based transformer on-line monitoring early warning device - Google Patents
Magnetic field detection principle-based transformer on-line monitoring early warning device Download PDFInfo
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- CN203705574U CN203705574U CN201420082342.8U CN201420082342U CN203705574U CN 203705574 U CN203705574 U CN 203705574U CN 201420082342 U CN201420082342 U CN 201420082342U CN 203705574 U CN203705574 U CN 203705574U
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Abstract
A magnetic field detection principle-based transformer on-line monitoring early warning device includes a 3D magnetic field sensor, a magnetic field detection module and a data acquisition module, wherein the 3D magnetic field sensor is connected with the magnetic field detection module, the magnetic field detection module is connected with the data acquisition module, and the data acquisition module is connected with a monitoring module. According to the magnetic field detection principle-based transformer on-line monitoring early warning device of the utility model, the quantity of magnetic flux leakage of a transformer can be detected through a magnetic field detection technology, and therefore, the aging level of the transformer can be judged, and early warning can be performed.
Description
Technical field
A kind of transformer online monitoring early warning transposition based on magnetic field detection principle of the utility model, relates to transformer fault detection field.
Background technology
Powerful along with electricity needs, the capacity of transmission facility is also increasing.For one of most important equipment in power transmission and transformation: transformer, the size of its volume is often directly proportional to the capacity of self.Volume of transformer is larger, overhauls also more inconvenient.Transformer, after permanent operation, owing to being subject to the impression of some factors such as thermal and magnetic, rainwater, sunlight, tends to be accompanied by aging.The difference of degree of aging, the transformer different existing picture that can make new advances, in the time also there is not obvious fault phenomenon, is often difficult to detect transformer and has reached which kind of degree of aging.Transformer, due to manufacturing technology, can not be eliminated leakage field completely, therefore, is in operation, and leakage field always exists, and the appearance of leakage field, can make transformer case occur magnetic loss and be accompanied by heating.It is aging that the long-term appearance of this phenomenon can cause in transformer leakage field loop parts to occur, further improves leakage impedance, and magnetic flux leakage is further increased.At present transformer being carried out to fault detect has: 1), shock detection, and for judging whether transformer occurs superstructure loosening.2), oil mass detect (oily formula transformer), judge whether to occur leakage of oil by oil mass, excessive heating and short circuit.3), temperature detection, judge that whether transformer temperature too high.4), short circuit current detect, alternate for judging transformer inside, whether single-phase turn-to-turn there is short trouble.For fault detect 2), 4) be usually used in short trouble and occur, and not make early warning for transformer is aging.Fault detect 1), 3) can be used for rushing certain and conveniently reflect certain specific normal phenomenon of transformer.But for the increase of transformer capacity, these several detections often can not meet the development of transformer.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provides a kind of transformer online monitoring early warning transposition based on magnetic field detection principle, detect transformer magnetic flux leakage by magnetic field detection technology, thereby judge the ageing level that transformer is, thereby make in advance early warning.
The technical scheme that the utility model is taked is: the transformer online monitoring early warning transposition based on magnetic field detection principle, comprise three-D magnetic field sensor, magnetic field detection module, data acquisition module, three-D magnetic field sensor connects magnetic field detection module, magnetic field detection module connection data acquisition module, data acquisition module connects monitoring module;
Described magnetic field detection module comprises single-chip microcomputer U1, and single-chip microcomputer U1 connects the first wireless transmission circuit, pulse driving circuit and signal amplification circuit; Described data acquisition module comprises key circuit, RS-485 transmission circuit and indicator light circuit, and described key circuit, RS-485 transmission circuit are connected single-chip microcomputer U1 with indicator light circuit, and single-chip microcomputer U1 connects the second wireless transmission circuit.
Described magnetic field detection module, data acquisition module connect respectively power transfer module.
Described key circuit comprises button B1, B2, and button B1 one end connection+5V power supply, the other end are by resistance R 13 ground connection, and button B2 one end connection+5V power supply, the other end are by resistance R 14 ground connection.
Described RS-485 transmission circuit comprises SP3485 protocol conversion chip U3, and SP3485 protocol conversion chip U3 connects single-chip microcomputer U1 by not gate U4.
Described indicator light circuit comprises LED lamp module, in multiple LED lamps any one, its one end and single-chip microcomputer U1 connect, the other end is by ground connection after resistance of corresponding connection.
Comprise+5V of described power transfer module reduction voltage circuit ,-5V voltage conversion circuit.
Described monitoring module adopts PC computer.
Described three-D magnetic field sensor is at least 3, and three-D magnetic field sensor is HMC1023 magnetoresistive transducer.
The transformer online monitoring early warning transposition of the utility model based on magnetic field detection principle, technique effect is as follows:
1), by magnetic field detection module and data acquisition module are set separately, between adopt Wireless Data Transmission that magnetic field acquisition module and data acquisition center are installed to simplify and convenient.
2), the quantity of acquisition module can add and reduce by user's demand, go for like this transformers of different sizes, makes data acquisition convenient, can also help the accuracy of judgement by the quantity of magnetic field acquisition module is rationally set;
3), adopt row's type LED lamp module to show that magnetic field acquisition module successful connection, conveniently intuitively.
4), adopt RS-485 agreement to say transmission between PC computer and acquisition module, can conveniently carry out long-distance transmissions, and can person easy to use store data with computer.
Accompanying drawing explanation
Fig. 1 is the utility model device connection diagram.
Fig. 2 is the utility model device magnetic field detection module circuit diagram.
Fig. 3 is the utility model device data acquisition module circuit diagram.
Fig. 4 is the utility model installation's power source modular converter circuit diagram.
Embodiment
Transformer online monitoring early warning transposition based on magnetic field detection principle, comprise three-D magnetic field sensor, magnetic field detection module, data acquisition module, three-D magnetic field sensor connects magnetic field detection module, magnetic field detection module connection data acquisition module, and data acquisition module connects monitoring module.Described magnetic field detection module, data acquisition module connect respectively power transfer module.
Magnetic field detection module: be mainly by three-D magnetic field sensor HMC1023, periphery magnetic field to be detected, observe the magnetic flux leakage conversion of transformation, because volume of transformer is large, so a three-D magnetic field sensor is certainly inadequate, therefore divides specially and design in magnetic-field detecting unit.Magnetic field sensor number can require to increase or reduce according to user.On data acquisition module, will have corresponding LED lamp and show, but can only arrange at most nine.Transmission line adopts RS-485 bus to transmit, and its transmission range enough arrives computer monitor by transformer.
As shown in fig. 1: described magnetic field detection module comprises single-chip microcomputer U1, and single-chip microcomputer U1 connects the first wireless transmission circuit, pulse driving circuit and signal amplification circuit.
1), adopt three-dimensional magnetic field detecting sensor HMC1023 to detect transformer leakage field.HMC1023 type magnetic strength sensor is the high-performance 3-shaft type magnetoresistive transducer with single component design.There are three orthogonal magnetoresistive transducers its inside, and each magnetoresistive transducer is arranged by 4 unit resistance bridges, magnetic field can be converted to different output voltages, and the magnetic field intensity that can pass is low to moderate 85 microgasusses, and this meets the low requirement in transformer leakage field magnetic field just.This circuit is by a HMC1023 magnetic field sensor U2, three INA128 instrument amplifier U3, U4, U5, the two MOSFET of IRF7509 drive chip U6, resistance R 3, R4, R5, R6, R7, R8, capacitor C 10, C11, C12, and diode D1, D2, D3 composition.8, No. 9 pins of HMC1023 are the positive and negative pin of X-axis signal output, 11, No. 12 pins are the positive and negative pin that Y-axis signal is exported, 14, No. 1 pin is the positive and negative pin that Z axis signal is exported, and three signal output pins of X, Y, Z axis are connected to respectively U3, the U4 of INA128,3, No. 4 pins of U5.INA128 is that instrument amplifier has high input impedance, high cmrr, low biasing and have the amplifying power that reaches as high as 1000 times, instrument amplifier only needs a resistance can regulate enlargement factor, as R3, R4, R5 that 1, of U3, U4, U5 No. 8 pin connect, 4, No. 7 pins of U3, U4, U5 connect respectively-,+5V power supply, No. 5 pin ground connection.No. 6 pins of U3, U4, U5 are signal output pin, by 23 ~ No. 25 pins (being ADC0 ~ ADC2 analog to digital conversion port) of half-wave rectification and single-chip microcomputer U1.D1, R6, C10 and D2, R7, C11 and D3, R8, C12 form respectively the half-wave rectifying circuit that No. 6 pins of U3, U4, U5 connect.After the feeble signal of HMC1023 magnetic field sensor output is amplified by instrument amplifier INA128, then through half-wave rectification output single-chip microcomputer, then single-chip microcomputer becomes digital signal to read by analog to digital conversion.No. 13 pins of U1 drive chip U6 to be connected to No. 10 pins of U2 by IRF7509, U2(HMC1023) No. 10 pins are pulsed reset pin, because HMC1023 long term exposure is under terrestrial magnetic field, may exist bigoted, therefore before each measurement, by pulse, it is once resetted, guarantee measurement accuracy.
2), the first wireless transmission circuit: the nRF24L01 radio transmitting and receiving chip that adopts NORDIC company to produce, this chip operation is in the ISM of 2.4GHz ~ 2.5GHz frequency range.This chip power-consumption is extremely low, mainly contain 4 kinds of mode of operations: receiving mode, sending mode, standby mode, power-down mode, in the time being operated under emission mode that emissive power is 0dBm, current drain is 11.3mA, when receiving mode, be 12.3mA, under power-down mode and standby mode, current drain is less than 1mA.As seen from the figure, this circuit is by nRF24L01, capacitor C 1, C2, C3, C4, C5, C6, C7, C8, and resistance R 1, R2, inductance L 1, L2, L3, crystal oscillator X1, antenna composition, each component parameters refers to circuit diagram.1 ~ No. 6 pin of nRF24L01 is connected with ATMEGA8PB7 ~ PB2 pin, between carry out data transmission by SPI agreement.ATMEGA8 sends the control such as data, standby by SPI to nRF24L01.In controller, nRF24L01 is only operated in sending mode and standby mode.In the time barrier being detected apart from detection module, single-chip microcomputer sends bearing signal by nRF24L01 to " azimuth indicator ".
3), single-chip microcomputer U1 adopts the untreated device of ATMEGA8 low-power consumption that Ying Te the Mearl Corporation produces.
Data acquisition module: as shown in Figure 3, this circuit is made up of 4 parts internal circuit: the second wireless transmission circuit, key circuit, indicator light circuit and RS-485 transmission circuit.
1), the second wireless transmission circuit is consistent with the first wireless transmission circuit in acquisition module, repeat no more herein.
2), key circuit: have two to control button, circuit is made up of button B1, B2, resistance R 13, R14.No. 12 pins of single-chip microcomputer U1 join with+5V power supply by button B1, and by R13 resistance eutral grounding; No. 13 pins of U1 join with+5V power supply by button B2, and by R14 resistance eutral grounding.Button B1 function is newly increasing or reducing after magnetic field detection module, for module is searched for again.Button B2 function is for opening or close acquisition function.After B1 presses ,+5V power turn-on, is 5V on No. 12 pins of U1, and expression button is pressed; After button B1 flicks, 5V power supply disconnects, and it is 0V that resistance R 13 makes No. 12 pins on U1 as pull down resistor, represents that B1 disconnects.Button B2 principle is consistent with B1
3), indicator light circuit: major function is to show magnetic field acquisition module successful connection by LED.This circuit is by arranging type LED module U2, and resistance R 3 ~ R12 forms.1 ~ No. 10 pin of U2 is connected respectively at 23,24,25,26,27,28,1,4,5, No. 6 pins of single-chip microcomputer U1, and 11 ~ No. 20 pins of U2 receive ground by R3 ~ R12 respectively.U2 is LED lamp from right to left, and label is D1 ~ D10 respectively, and wherein D1 ~ D9 is corresponding " magnetic field gathers 1 ~ 9 " respectively.Collection center and magnetic field acquisition module successful connection, single-chip microcomputer will drive corresponding LED lamp to brighten, thereby reaches a kind of obvious prompting effect.D10 is the pilot lamp that gathers central task.
4), RS-485 transmission circuit: major function is that the USART serial protocol that single-chip microcomputer is carried converts 485 semiduplex agreements to, and the data that collect are sent on computer.This circuit is by SP3485 protocol conversion chip U3, and not gate U4 forms.SP3485 is protocol conversion chip, converts USART serial protocol to RS485 half-duplex agreement.1, No. 4 pin (send, receive) of U3 is received respectively 3, No. 2 pins (TXD, the RXD of the USART serial port of corresponding single-chip microcomputer) of single-chip microcomputer U1.No. 11 pins of single-chip microcomputer U1 are directly connected to No. 3 pins of U3, are also connected to No. 2 pins of U3 by a not gate, and 2, No. 3 pins of U3 are respectively the Enable Pins of 1, No. 4 pin of U3, and No. 2 pins are that low level enables, and No. 3 pins are that high level enables.Because RS485 is half duplex communication, receive and send out data and can not carry out simultaneously, therefore design circuit like this, reception and the sending function switching that can make single-chip microcomputer U1 just can control U3 by a pin enable, and optimize the utilization of resources.No. 7 pins of U3 are 485 protocol signal output pins, are connected to computer.
Fig. 4 is power transfer module: comprise arrive+5V reduction voltage circuit of 9V, arrive-5V translation circuit of 9V.9V power supply is provided by lithium battery, and S1 is switch, and D1 is direction diode, prevents that battery from connecing the anti-circuit that burns.This circuit exists respectively in acquisition module and control module as independent circuits, and electric energy is provided.
1), 7.5V is to+5V reduction voltage circuit: comprise voltage stabilizing chip 7805, PNP triode Q1, capacitor C 1, C2, resistance R 1, light emitting diode D2 composition.7805 No. 1 pin connects 9V battery, and No. 2 pin ground connection, No. 3 pins are 5V output, and emitter-base bandgap grading, the collector of triode Q1 are connected with 7805 No. 1 pin, and collector is connected with No. 3 pins, the power filter that capacitor C 1, C2 are input and output.Resistance R 1 is 5V power light with LED lamp D2, and prompting user 5V power supply is normal.
2), 7.5V is to-5V voltage conversion circuit: comprise voltage stabilizing chip 7905, capacitor C 3, C4, resistance R 2, light emitting diode D3 composition.7905 No. 1 pin connects 9V battery, and No. 2 pin ground connection, No. 3 pins are-5V output, the power filter that capacitor C 3, C4 are input and output.Resistance R 2 is-5V power light that prompting user-5V power supply is normal with LED lamp D3.
Claims (8)
1. the transformer online monitoring early warning transposition based on magnetic field detection principle, comprise three-D magnetic field sensor, magnetic field detection module, data acquisition module, it is characterized in that, three-D magnetic field sensor connects magnetic field detection module, magnetic field detection module connection data acquisition module, data acquisition module connects monitoring module;
Described magnetic field detection module comprises single-chip microcomputer U1, and single-chip microcomputer U1 connects the first wireless transmission circuit, pulse driving circuit and signal amplification circuit; Described data acquisition module comprises key circuit, RS-485 transmission circuit and indicator light circuit, and described key circuit, RS-485 transmission circuit are connected single-chip microcomputer U1 with indicator light circuit, and single-chip microcomputer U1 connects the second wireless transmission circuit.
2. the transformer online monitoring early warning transposition based on magnetic field detection principle according to claim 1, is characterized in that, described magnetic field detection module, data acquisition module connect respectively power transfer module.
3. the transformer online monitoring early warning transposition based on magnetic field detection principle according to claim 1, it is characterized in that, described key circuit comprises button B1, B2, button B1 one end connection+5V power supply, the other end are by resistance R 13 ground connection, and button B2 one end connection+5V power supply, the other end are by resistance R 14 ground connection.
4. the transformer online monitoring early warning transposition based on magnetic field detection principle according to claim 1, is characterized in that, described RS-485 transmission circuit comprises SP3485 protocol conversion chip U3, and SP3485 protocol conversion chip U3 connects single-chip microcomputer U1 by not gate U4.
5. the transformer online monitoring early warning transposition based on magnetic field detection principle according to claim 1, it is characterized in that, described indicator light circuit comprises LED lamp module, in multiple LED lamps any one, its one end and single-chip microcomputer U1 connect, the other end is by ground connection after resistance of corresponding connection.
6. the transformer online monitoring early warning transposition based on magnetic field detection principle according to claim 2, is characterized in that comprise+5V of described power transfer module reduction voltage circuit ,-5V voltage conversion circuit.
7. the transformer online monitoring early warning transposition based on magnetic field detection principle according to claim 1, is characterized in that, described monitoring module adopts PC computer.
8. the transformer online monitoring early warning transposition based on magnetic field detection principle according to claim 1, is characterized in that, described three-D magnetic field sensor is at least 3, and three-D magnetic field sensor is HMC1023 magnetoresistive transducer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420082342.8U CN203705574U (en) | 2014-02-26 | 2014-02-26 | Magnetic field detection principle-based transformer on-line monitoring early warning device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420082342.8U CN203705574U (en) | 2014-02-26 | 2014-02-26 | Magnetic field detection principle-based transformer on-line monitoring early warning device |
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| CN203705574U true CN203705574U (en) | 2014-07-09 |
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| CN201420082342.8U Expired - Fee Related CN203705574U (en) | 2014-02-26 | 2014-02-26 | Magnetic field detection principle-based transformer on-line monitoring early warning device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911465A (en) * | 2016-04-25 | 2016-08-31 | 国网新疆电力公司检修公司 | Circuit breaker switch state detection device based on principle of magnetic field |
| CN106526372A (en) * | 2016-10-27 | 2017-03-22 | 成都亚联科科技有限公司 | Automatic transformer function characteristic detection device |
| CN107588894A (en) * | 2017-09-15 | 2018-01-16 | 北京电子工程总体研究所 | A kind of minitype detecting device for box body tightness inspection |
| CN108414884A (en) * | 2018-05-13 | 2018-08-17 | 郭小红 | A kind of transformer fault monitoring method |
| CN108535573A (en) * | 2018-05-13 | 2018-09-14 | 郭小红 | A kind of magnetic field monitoring device towards transformer fault monitoring device |
| CN108535574A (en) * | 2018-05-13 | 2018-09-14 | 郭小红 | Transformer fault monitoring device |
| CN108549019A (en) * | 2018-05-25 | 2018-09-18 | 芜湖双翼航空装备科技有限公司 | A kind of aircarrier aircraft starting control switch time detection device and its control method |
| CN108614223A (en) * | 2018-05-13 | 2018-10-02 | 郭小红 | Current collector parameter determination method in a kind of magnetic field monitoring device |
| CN110737199A (en) * | 2018-07-19 | 2020-01-31 | 首利实业股份有限公司 | Intelligent electric appliance controller |
-
2014
- 2014-02-26 CN CN201420082342.8U patent/CN203705574U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911465A (en) * | 2016-04-25 | 2016-08-31 | 国网新疆电力公司检修公司 | Circuit breaker switch state detection device based on principle of magnetic field |
| CN106526372A (en) * | 2016-10-27 | 2017-03-22 | 成都亚联科科技有限公司 | Automatic transformer function characteristic detection device |
| CN107588894A (en) * | 2017-09-15 | 2018-01-16 | 北京电子工程总体研究所 | A kind of minitype detecting device for box body tightness inspection |
| CN108414884A (en) * | 2018-05-13 | 2018-08-17 | 郭小红 | A kind of transformer fault monitoring method |
| CN108535573A (en) * | 2018-05-13 | 2018-09-14 | 郭小红 | A kind of magnetic field monitoring device towards transformer fault monitoring device |
| CN108535574A (en) * | 2018-05-13 | 2018-09-14 | 郭小红 | Transformer fault monitoring device |
| CN108614223A (en) * | 2018-05-13 | 2018-10-02 | 郭小红 | Current collector parameter determination method in a kind of magnetic field monitoring device |
| CN108614223B (en) * | 2018-05-13 | 2020-09-22 | 岳阳神威电磁设备有限公司 | Method for determining parameters of current collector in magnetic field monitoring device |
| CN108535574B (en) * | 2018-05-13 | 2020-10-09 | 江苏亚威变压器有限公司 | Transformer fault monitoring device |
| CN108549019A (en) * | 2018-05-25 | 2018-09-18 | 芜湖双翼航空装备科技有限公司 | A kind of aircarrier aircraft starting control switch time detection device and its control method |
| CN110737199A (en) * | 2018-07-19 | 2020-01-31 | 首利实业股份有限公司 | Intelligent electric appliance controller |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140709 Termination date: 20150226 |
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| EXPY | Termination of patent right or utility model |