CN206601099U - A kind of deformation of transformer winding failure detector - Google Patents
A kind of deformation of transformer winding failure detector Download PDFInfo
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- CN206601099U CN206601099U CN201720301241.9U CN201720301241U CN206601099U CN 206601099 U CN206601099 U CN 206601099U CN 201720301241 U CN201720301241 U CN 201720301241U CN 206601099 U CN206601099 U CN 206601099U
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Abstract
The utility model discloses a kind of deformation of transformer winding failure detector, including signal generator, data acquisition card and industrial computer；It is characterized in that：Also include signal acquisition transmitter module and signal receiving module；The signal acquisition transmitter module includes analog to digital conversion circuit, attenuator circuit, signal acquisition single-chip microcomputer, signal transmitting power amplifier and signal transmitting antenna；The signal receiving module includes signal receiving antenna, signal reception with power amplifier, detecting circuit and signal reception single-chip microcomputer；The output port of signal receiving antenna is connected with signal reception with the input port of power amplifier, signal reception is connected with the output port of power amplifier with signal reception with the input pin of single-chip microcomputer, and signal reception is connected with the output pin of single-chip microcomputer with the input port of industrial computer.Deformation of transformer winding failure detector of the present utility model has structure reliably reasonable, detects more accurate advantage.
Description
Technical field
The utility model belongs to high-tension electricity assembly detection apparatus field, and in particular to a kind of transformer fault detection dress
Put.
Background technology
Transformer is as the important component of power network, and the safe operation to power network is particularly important.
In the last few years, related scholar for transformer fault detection proposed many methods, typically have harmonic impedance method,
Short circuit impedance method, supercritical ultrasonics technology, Low Voltage Impulse Method, frequency response method and vibration method of frequency response method etc..In these methods, frequency response
Method be most widely used, one kind that effect is ideal, and this method there has been concerned countries standard（《DL/T911-
The frequency response analysis of 2004 winding deformation of power transformer》）And international standard, and have in grid company supporting detection
Equipment（Deformation of transformer winding tester）.
Frequency response method test philosophy（It is downloaded from seeing《The frequency response of DL/T911-2004 winding deformation of power transformer point
Analysis method》Page 2）It is：Under the voltage effect of upper frequency, each winding of transformer can be considered one by linear resistance,
The passive linear two-port network that inductance (mutual inductance), electric capacity equal distribution parameter are constituted, its bulk properties can pass through transfer function H
(jw)) describe, referring to shown in this specification accompanying drawing 1.If winding deforms, the ginseng such as distributed inductance, electric capacity inside winding
Number necessarily change, cause its equivalent network transfer function H (jw)) zero point and limit change, ring the frequency of network
Characteristic is answered to change.
Deformation of transformer winding is detected with frequency response analysis, is the amplitude-frequency response by detecting each winding of transformer
Characteristic, and vertical or horizontal comparison is carried out to testing result, according to the difference of amplitude-frequency response characteristic, judge that transformer may occur
Winding deformation.
In the prior art, using the test structure schematic diagram of frequency response method referring to shown in this specification accompanying drawing 2.But it is existing
Although frequency response method use more effectively, test signal is easily influenceed by various uncertain factors, for example, survey
Trial signal has stray capacitance quite sensitive to wire, when stray capacitance changes, and frequency response curve easily occurs substantially to become
Change, so as to trigger wrong diagnosis.Same transformer is tested using same detection device, when the signal transmssion line used in test
（Wire）Distribution trend when changing, the stray capacitance that may result in wire changes, so that the frequency response measured
Curve changes, and influences test accuracy.
Based on this, applicant considers that a kind of structure of design is reliably reasonable, the more accurate deformation of transformer winding event of detection
Hinder detection means.
Utility model content
For above-mentioned the deficiencies in the prior art, technical problem to be solved in the utility model is：How a kind of knot is provided
Structure is reliably reasonable, detects more accurate deformation of transformer winding failure detector.
In order to solve the above-mentioned technical problem, the utility model employs following technical scheme：
A kind of deformation of transformer winding failure detector, including signal generator, data acquisition card and industrial computer；It is described
Signal generator is used to export sine-wave excitation source；
The data acquisition card has two input interfaces and an output interface, and two of the data acquisition card are defeated
An excitation interface to be connected for the input with Transformer Winding to be measured in incoming interface, another is for treating
Survey the detection interface that the output end of Transformer Winding is connected；The output interface of the data acquisition card is used to export transformation to be measured
The amplitude-frequency response of device winding；
The industrial computer is used to show amplitude-frequency response；It is characterized in that：
Also include signal acquisition transmitter module and signal receiving module；
The signal acquisition transmitter module includes analog to digital conversion circuit, attenuator circuit, signal acquisition single-chip microcomputer, signal hair
Penetrate with power amplifier and signal transmitting antenna；The input port of analog-digital conversion circuit as described is adopted using the communications cable with the signal
The output interface of truck is connected, and the output port of analog-digital conversion circuit as described is connected with the input port of the attenuator circuit
Connect, the output port of the attenuator circuit is connected with the signal acquisition with the input pin of single-chip microcomputer, the signal acquisition
It is connected with the output pin of single-chip microcomputer with the signal transmitting with the input port of power amplifier, the signal transmitting power amplifier
The output port of circuit is connected with the signal transmitting antenna；
The signal receiving module includes signal receiving antenna, signal reception and connect with power amplifier, detecting circuit and signal
Receipts single-chip microcomputer；The signal receiving antenna is connected with the signal transmitting antenna wireless coupling, the signal receiving antenna
Output port is connected with the signal reception with the input port of power amplifier, the output of the signal reception power amplifier
Port is connected with the signal reception with the input pin of single-chip microcomputer, the output pin of the signal reception single-chip microcomputer and institute
The input port for stating industrial computer is connected.
The course of work of deformation of transformer winding failure detector of the present utility model is：
First, amplitude-frequency response is collected by existing method of frequency response method（Signal）After, output signals to modulus and turn
Circuit is changed, attenuator circuit is output signals to again after analog-to-digital conversion, single-chip microcomputer is inputted after signal attenuation to normal size.
Then, then by single-chip microcomputer output signals to power amplifier input port, the signal output after power amplification to antenna,
Launched with electromagnetic wave after signal, by electromagnetic induction in the antenna induction current signal of receiving terminal, the electric current induced
After amplifying after signal through power amplifier, it is input to after demodulation in single-chip microcomputer, single-chip microcomputer is input to signal in industrial computer analyzes again.
The operation principle of deformation of transformer winding failure detector of the present utility model is：
Because the mode of deformation of transformer winding failure detector radio communication of the present utility model is believed to transmit test
Number, so, it becomes possible to significantly shorten the usage amount of transmission cable between industrial computer and data acquisition card, effectively reduction transmission
Interference of the stray capacitance to test signal in cable, so that the result of detection is more accurate, improves method of frequency response method for transformation
The diagnosis order of accuarcy of device winding deformation.
Preferably, the attenuator circuit includes resistance, the input of the resistance constitutes the input of the attenuator circuit
Port, the output end of the resistance constitutes the output port of the attenuator circuit.
The signal for acting as making the amplitude after analog-to-digital conversion higher of attenuator circuit is converted to the letter of suitable single-chip microcomputer input
Number, the amplitude of the general pumping signal for using method of frequency response method to detect is 20V, and the input signal of single-chip microcomputer is generally below 5V, so
Carrying out decay to signal using attenuator circuit can avoid burning single-chip microcomputer, it is ensured that the utility model deformation of transformer winding failure
Detection means persistently can be used reliably.
And after using this optimal technical scheme, may be such that the structure of this deformation of transformer winding failure detector more
Simplify, price is more cheap.
Preferably, the signal acquisition single-chip microcomputer and signal reception single-chip microcomputer are same single-chip microcomputer.
Multigroup corresponding input/output pin is respectively provided with monolithic single-chip microcomputer, therefore disclosure satisfy that signal is received and signal
The data transportation requirements of collection.
And after using this optimal technical scheme, may be such that the structure of this deformation of transformer winding failure detector more
Simplify, price is more cheap.
Preferably, the same single-chip microcomputer is model MSP430 single-chip microcomputer.
So, you can the characteristics of possessing super low-power consumption and high reliability using model MSP430 single-chip microcomputers, it can make
The test for obtaining deformation of transformer winding failure detector of the present utility model is more saved reliably.
At the same time, when the technical program is with MSP43 series monolithics（0F5438 may be selected in concrete model）It is used as control
Core, regulates and controls two Signal Terminals respectively, and a terminal is used as collection transmission signal, and another terminal is used as receiving signal.
The Automatic level control local oscillator that the terminal of collection transmission signal is exported by serial ports（I.e.：LC oscillators）Cut-off with realize
OOK is modulated（I.e.：Binary system on off keying (OOK：On-Off Keying) also known as binary system amplitude-shift keying (2ASK), it is carrier wave
Amplitude is with digital baseband signal（Digital baseband signal is binary system）And the digital modulation changed）, then sent out again by power amplifier
It is shot out, the signal at transmitting is coupled out induced-current in the antenna for receiving signal；
Induced-current is amplified by the terminal for receiving signal, then the signal after amplification is demodulated by detecting circuit, solution
Input in industrial computer and analyze again after signal input single-chip microcomputer conversion after tune.
The signal being wirelessly transferred is propagated by the coupling of electromagnetic wave, when electromagnetic wave is in spatial, the day of parameter matching
Electric current is coupled out between line, it is achieved thereby that signal is by function of the antenna transmission for another antenna.
To sum up it can also be seen that deformation of transformer winding failure detector of the present utility model when in use, using OOK
Modulation system, the modulation degree of which is 100%, and circuit composition is simple, and demodulation is easily realized and accurately and reliably.
Preferably, the signal transmitting power amplifier and signal reception are electric using identical power amplifier with power amplifier
Line structure, the power amplifier structure includes 2SC3355 triodes, the colelctor electrodes of the 2SC3355 triodes and emitter stage it
Between constitute the output port of the power amplifier structure, constitute the power amplifier between the base stage and emitter stage of the 2SC3355 triodes
The input port of circuit structure.
After above-mentioned optimal technical scheme, there can be circuit radiant power high, cheap, high conversion efficiency, easily
Tuning, can meet the distance of test request and the advantage of power consumption.
The wireless communication protocol of the utility model when in use is：Transmission is actively initiated by signal acquisition node, signal connects
Receive terminal and collect the information that probe node is sent.The communication bandwidth of the agreement utilizes high, and more power saving.Frequency of carrier signal is about
For 10.7MHZ, power amplifier pumping signal is sine wave.
Compared with the existing technology compared with deformation of transformer winding failure detector of the present utility model has following beneficial skill
Art effect：
1. the utility model is not related to the circuit structure of complexity, and operation principle is simple, also, used element price is low
It is honest and clean, in the test equipment that transformer method of frequency response method can be directly applied to.
2. the utility model replaces measurement circuit with the scheme being wirelessly transferred, to avoid measurement circuit changes in distribution from being occurred
Stray capacitance influence, to improve the order of accuarcy of test, there is preferable novelty.
3. the utility model is still to obtain amplitude-frequency response based on frequency response method, and frequency response method is that low-voltage is surveyed
Method for testing, the larger electromagnetic pulse of test environment noenergy, so electromagnetic interference will not be caused to being wirelessly transferred, is better assured that
The accuracy of testing result of the present utility model.
4. the power consumption of element used in the utility model is relatively low, is conducive to saving the energy, environmental protection, so the utility model
Good economy performance.
Brief description of the drawings
Fig. 1 is the basic measure loop of frequency response analysis.
Fig. 2 is the wiring schematic diagram of the detection device of existing use frequency response method.
Fig. 3 is the schematic diagram of deformation of transformer winding failure detector of the present utility model.
Fig. 4 is the electricity of the power amplifier structure employed in deformation of transformer winding failure detector of the present utility model
Lu Tu.
Fig. 5 is in signal acquisition transmitter module in deformation of transformer winding failure detector of the present utility model
The wiring diagram of 74HC00 chips.
Fig. 6 is the local circuit of signal receiving module in deformation of transformer winding failure detector of the present utility model
Figure.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.Wherein, for description using it is all as above,
Under, the exemplary term such as left and right, it is therefore intended that help reader to understand, without being intended for limitation.
A kind of deformation of transformer winding failure detector, including signal generator, data acquisition card and industrial computer；It is described
Signal generator is used to export sine-wave excitation source；
The data acquisition card has two input interfaces and an output interface, and two of the data acquisition card are defeated
An excitation interface to be connected for the input with Transformer Winding to be measured in incoming interface, another is for treating
Survey the detection interface that the output end of Transformer Winding is connected；The output interface of the data acquisition card is used to export transformation to be measured
The amplitude-frequency response of device winding；
The industrial computer is used to show amplitude-frequency response；
As shown in figure 3, also including signal acquisition transmitter module and signal receiving module；
The signal acquisition transmitter module includes analog to digital conversion circuit, attenuator circuit, signal acquisition single-chip microcomputer, signal hair
Penetrate with power amplifier and signal transmitting antenna；The input port of analog-digital conversion circuit as described is adopted using the communications cable with the signal
The output interface of truck is connected, and the output port of analog-digital conversion circuit as described is connected with the input port of the attenuator circuit
Connect, the output port of the attenuator circuit is connected with the signal acquisition with the input pin of single-chip microcomputer, the signal acquisition
It is connected with the output pin of single-chip microcomputer with the signal transmitting with the input port of power amplifier, the signal transmitting power amplifier
The output port of circuit is connected with the signal transmitting antenna；
The signal receiving module includes signal receiving antenna, signal reception and connect with power amplifier, detecting circuit and signal
Receipts single-chip microcomputer；The signal receiving antenna is connected with the signal transmitting antenna wireless coupling, the signal receiving antenna
Output port is connected with the signal reception with the input port of power amplifier, the output of the signal reception power amplifier
Port is connected with the signal reception with the input pin of single-chip microcomputer, the output pin of the signal reception single-chip microcomputer and institute
The input port for stating industrial computer is connected.
Wherein, the attenuator circuit includes resistance, and the input of the resistance constitutes the input port of the attenuator circuit,
The output end of the resistance constitutes the output port of the attenuator circuit.
Wherein, the signal acquisition single-chip microcomputer and signal reception single-chip microcomputer are same single-chip microcomputer.
Wherein, the same single-chip microcomputer is model MSP430 single-chip microcomputer.
As shown in figure 4, wherein, the signal transmitting power amplifier and signal reception use identical with power amplifier
Power amplifier structure, the power amplifier structure includes 2SC3355 triodes, the colelctor electrode and hair of the 2SC3355 triodes
The output port of the power amplifier structure is constituted between emitter-base bandgap grading, is constituted between the base stage and emitter stage of the 2SC3355 triodes
The input port of the power amplifier structure.
During implementation（As shown in Figure 5）, the signal transmitting is with power amplifier also including 74HC00 chips.74HC00 is one high
Frequency cmos elements, the digital operation such as signal realization that can be to input and computing, inverse, this can be may be such that using the chip
Power consumption when utility model is used is lower.
During implementation（As shown in Figure 6）, signal reception power amplifier is by two reversal connection electric capacity amplitude limits, then by resonance circuit
Envelope detection after amplification.
The course of work of above-mentioned deformation of transformer winding failure detector is：
First, amplitude-frequency response is collected by existing method of frequency response method（Signal）After, output signals to modulus and turn
Circuit is changed, attenuator circuit is output signals to again after analog-to-digital conversion, single-chip microcomputer is inputted after signal attenuation to normal size.
Then, then by single-chip microcomputer output signals to power amplifier input port, the signal output after power amplification to antenna,
After being sent with electromagnetic wave, by electromagnetic induction the other end antenna induction current signal, after the current signal induced
After amplifying through power amplifier, it is input to after demodulation in single-chip microcomputer, single-chip microcomputer is input to signal in industrial computer analyzes again.
The operation principle of above-mentioned deformation of transformer winding failure detector is：
Because the mode of above-mentioned deformation of transformer winding failure detector radio communication transmits test signal, this
Sample one, it becomes possible to significantly shorten the usage amount of transmission cable between industrial computer and data acquisition card, therefore can effectively reduce biography
Interference of the stray capacitance to test signal in transmission cable so that the result of test is more accurate, improves method of frequency response method for transformer
The diagnosis order of accuarcy of winding deformation.
Compared with the existing technology compared with there is above-mentioned deformation of transformer winding failure detector following Advantageous to imitate
Really：
1. above-mentioned not to be related to complicated circuit structure, operation principle is simple, also, used element is cheap, can
To be directly applied in the test equipment of transformer method of frequency response method.
2. it is above-mentioned to replace measurement circuit with the scheme being wirelessly transferred, it is spuious with avoid that measurement circuit changes in distribution occurs
The influence of electric capacity, to improve the order of accuarcy of test, there is preferable novelty.
3. above-mentioned is still to obtain amplitude-frequency response based on frequency response method, and frequency response method is low voltage test side
Method, the larger electromagnetic pulse of test environment noenergy, so electromagnetic interference will not be caused to being wirelessly transferred, is better assured that above-mentioned
Testing result accuracy.
4. the power consumption of above-mentioned element used is relatively low, is conducive to saving the energy, environmental protection, so above-mentioned good economy performance.
It the above is only the utility model preferred embodiment, need to point out not departed from for those skilled in the art
On the premise of the technical program, several modifications and improvements can also be made, the technical scheme of above-mentioned modification and improvement should be regarded equally
For fall into this application claims scope.
Claims (5)
1. a kind of deformation of transformer winding failure detector, including signal generator, data acquisition card and industrial computer；The letter
Number generator is used to export sine-wave excitation source；
The data acquisition card has two input interfaces and an output interface, and two inputs of the data acquisition card connect
An excitation interface to be connected for the input with Transformer Winding to be measured in mouthful, another is for becoming with to be measured
The detection interface that the output end of depressor winding is connected；The output interface of the data acquisition card be used for export transformer to be measured around
The amplitude-frequency response of group；
The industrial computer is used to show amplitude-frequency response；It is characterized in that：
Also include signal acquisition transmitter module and signal receiving module；
The signal acquisition transmitter module includes analog to digital conversion circuit, attenuator circuit, signal acquisition single-chip microcomputer, signal transmitting use
Power amplifier and signal transmitting antenna；The input port of analog-digital conversion circuit as described is using the communications cable and the data acquisition card
Output interface be connected, the output port of analog-digital conversion circuit as described is connected with the input port of the attenuator circuit, institute
The output port for stating attenuator circuit is connected with the signal acquisition with the input pin of single-chip microcomputer, the signal acquisition monolithic
The output pin of machine is connected with the signal transmitting with the input port of power amplifier, the signal transmitting power amplifier
Output port is connected with the signal transmitting antenna；
The signal receiving module includes signal receiving antenna, signal and received with power amplifier, detecting circuit and signal reception use
Single-chip microcomputer；The signal receiving antenna is connected with the signal transmitting antenna wireless coupling, the output of the signal receiving antenna
Port is connected with the signal reception with the input port of power amplifier, the output port of the signal reception power amplifier
It is connected with the signal reception with the input pin of single-chip microcomputer, output pin and the work of the signal reception single-chip microcomputer
The input port of control machine is connected.
2. deformation of transformer winding failure detector according to claim 1, it is characterised in that：The attenuator circuit includes
Resistance, the input of the resistance constitutes the input port of the attenuator circuit, and the output end of the resistance constitutes the decay
The output port of circuit.
3. deformation of transformer winding failure detector according to claim 1, it is characterised in that：The signal acquisition is single
Piece machine and signal reception single-chip microcomputer are same single-chip microcomputer.
4. deformation of transformer winding failure detector according to claim 3, it is characterised in that：The same single-chip microcomputer
For model MSP430 single-chip microcomputer.
5. deformation of transformer winding failure detector according to claim 1, it is characterised in that：The signal transmitting is diligent
Electric discharge road and signal reception use identical power amplifier structure with power amplifier, and the power amplifier structure includes
2SC3355 triodes, constitute the output end of the power amplifier structure between the colelctor electrode and emitter stage of the 2SC3355 triodes
Mouthful, the input port of the power amplifier structure is constituted between the base stage and emitter stage of the 2SC3355 triodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720301241.9U CN206601099U (en) | 2017-03-27 | 2017-03-27 | A kind of deformation of transformer winding failure detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720301241.9U CN206601099U (en) | 2017-03-27 | 2017-03-27 | A kind of deformation of transformer winding failure detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206601099U true CN206601099U (en) | 2017-10-31 |
Family
ID=60145136
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720301241.9U Expired - Fee Related CN206601099U (en) | 2017-03-27 | 2017-03-27 | A kind of deformation of transformer winding failure detector |
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| Country | Link |
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| CN (1) | CN206601099U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508995A (en) * | 2022-01-20 | 2022-05-17 | 中国航空工业集团公司北京长城计量测试技术研究所 | Step response characteristic calibration device and method of resistance strain measuring instrument |
-
2017
- 2017-03-27 CN CN201720301241.9U patent/CN206601099U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508995A (en) * | 2022-01-20 | 2022-05-17 | 中国航空工业集团公司北京长城计量测试技术研究所 | Step response characteristic calibration device and method of resistance strain measuring instrument |
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Granted publication date: 20171031 Termination date: 20180327 |