CN204203389U - A kind of locomotive transformer resonance frequency pick-up unit - Google Patents
A kind of locomotive transformer resonance frequency pick-up unit Download PDFInfo
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- CN204203389U CN204203389U CN201420751672.1U CN201420751672U CN204203389U CN 204203389 U CN204203389 U CN 204203389U CN 201420751672 U CN201420751672 U CN 201420751672U CN 204203389 U CN204203389 U CN 204203389U
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- 230000003137 locomotive effect Effects 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 8
- 238000012360 testing method Methods 0.000 description 5
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
A kind of locomotive transformer resonance frequency pick-up unit, comprise frequency sweep analyser, sample resistance, computer, wherein frequency sweep analyser comprises signal generator, high-speed collection card, the output port Vs of frequency sweep analyser is directly connected with input port Va, and input port Va is connected with transformer, and transformer secondary coil is connected with sample resistance, sample resistance is connected with the input port Vb of frequency sweep analyser, and frequency sweep analyser is also connected with computer.The utility model device is simple and easy, be convenient for carrying, the resonance frequency of transformer can be detected fast and accurately, make integrally dragging system operating frequency scope avoid the resonance frequency of transformer, prevent transformer from producing resonance, thus guarantee the operation that trailer system is safe and reliable.
Description
Technical field
The utility model relates to the safety precaution of high ferro locomotive traction system, is specifically related to the transformer resonance frequency detecting device of the safe operation affecting trailer system.
Background technology
Locomotive transformer is the core component for high ferro trailer system, termination filter reactor, current transformer even load after transformer.From the harmonic excitation of traction convertor, the resonance effect that transformer produces, changes input, output-resistor characteristic and the carrying load ability of transformer, causes whole trailer system not mating current transformer, endanger the safe operation of whole trailer system.
For above-mentioned situation, the locomotive transformer developed, verification experimental verification before dispatching from the factory, determines its resonant frequency point.Integrally dragging system operating frequency scope must avoid the tuning-points of the core components such as transformer, reactor, current transformer, thus avoids producing in transformer operational process resonance, guarantees the safe operation of locomotive traction system.
By the above, how to provide a kind of pick-up unit, to realize the measurement to locomotive transformer resonant frequency point, thus avoid producing in transformer operational process resonance, guarantee the safe operation of locomotive traction system.Become the technical matters that those skilled in the art need solution badly.
Find that following patent and the utility model have similarity by domestic retrieval:
Application number is 201410282756.X, the invention that name is called " ac electrified railway impedance of traction electric network frequency characteristic test device ".This invention provides a kind of ac electrified railway impedance of traction electric network frequency characteristic test device, be made up of step-down transformer TP, harmonic source HS, supervising device MC, voltage sensor TV, current sensor TA.Supervising device MC controls harmonic source HS and sends harmonic current, is injected in Traction networks by step-down transformer TP former limit winding; Voltage sensor TV, current sensor TA detect harmonic voltage and the harmonic current to Traction networks injection between contact net T and rail G respectively, and the output signal of supervising device MC receiver voltage sensor TV and current sensor TA completes harmonic impedance and calculates.In contact net energising situation, namely send frequency and the amplitude of electric current by adjustment harmonic source, obtain the impedance frequency characteristic of Traction networks, and then obtain resonance frequency.This invention can be used for the combined test of newly-built electric railway, also can be used for existing line, for solving resonance problems, ensureing that power supply safety provides technical support.
Application number is 201310219729.3, the invention that name is called " industrial frequency inductance-regulation resonance device and frequency modulation thereof judge the method for power frequency series resonance state ".A kind of industrial frequency inductance-regulation resonance device of this disclosure of the invention and frequency modulation thereof judge the method for power frequency series resonance state, comprise variable frequency control power supply, for exciting transformer primary side provides voltage, exciting transformer secondary side is connected to detected test product by a high-voltage adjustable reactor; Also comprise a voltage acquisition unit be connected with variable frequency control power supply, variable frequency control power supply, according to the voltage signal collected, provides signal and drives inductance electric adjusting mechanism to regulate high-voltage adjustable reactor, make whole system resonance under power frequency.The method adopts variable-frequency power sources, after reactor regulates, tuning-points is found by the mode under low pressure from dynamic resonance, relatively the difference of resonant frequency point and Frequency point 50Hz judges resonance conditions, point out regulated quantity and the direction of reactor air gap, resonant condition can be judged fast and realize industrial frequency resonance fast, be convenient to industrial frequency resonance boosting when realizing voltage transformer (VT) field-checking, improve labor productivity, have a good application prospect.
Although above 2 patents are all find the method for resonance frequency and device but all have from the utility model larger different in structure and principle.
Utility model content
The technical problems to be solved in the utility model is: the resonance effect how produced for transformer can have influence on the safe operation of trailer system, proposes the device and method that a kind of efficient pressure swing device resonance frequency detects, to realize the detection to transformer resonance point.
Pin is with the problems referred to above, the technical scheme that the utility model proposes is: a kind of locomotive transformer resonance frequency pick-up unit, comprise frequency sweep analyser, sample resistance, computer, wherein frequency sweep analyser comprises signal generator, high-speed collection card, the output port Vs of frequency sweep analyser is directly connected with input port Va, input port Va is connected with transformer, transformer secondary coil is connected with sample resistance, sample resistance is connected with the input port Vb of frequency sweep analyser, and frequency sweep analyser is also connected with computer.
Further, the signal generator in frequency sweep analyser is connected with output port Vs, makes output port Vs can export the frequency of 0.05kHz-1MHz and the voltage of 10Vp-p.
Further, frequency sweep analyser output port Vs is directly connected with input port Va, makes the frequency of input port Va, voltage and phase place always identical with phase place with the frequency of output port Vs, voltage.
Further, sample resistance has 2, selects sample resistance a or sample resistance b to be connected in circuit according to the impedance magnitude of transformer.
Further, transformer secondary coil is connected with sample resistance, and sample resistance is connected with the input port Vb of frequency sweep analyser, and the magnitude of voltage of input port Vb is determined by the voltage of output port Vs and frequency.
Further, frequency sweep analyser is connected with computer, and the high-speed collection card of frequency sweep analyser is transferred to computer from frequency, voltage and phase information that input port Va and input port Vb collects and processes.
The utility model has the advantages that:
1. can detect the resonance frequency of transformer fast and accurately, make integrally dragging system operating frequency scope avoid the resonance frequency of transformer, prevent transformer from producing resonance, thus guarantee the operation that trailer system is safe and reliable;
2. device is simple and easy, is convenient for carrying, and usable range is wide, can be applicable to all kinds of transformer resonance frequency detecting;
3. detection method is simple, operates simple and easy, in testing process to transformer without any damage.
Accompanying drawing explanation
Fig. 1 is connection diagram of the present utility model;
In figure: 1 frequency sweep analyser, 11 output port Vs, 12 input port Va, 13 input port Vb, 2 transformers, 21 primary coils, 22 secondary coils, 31 sample resistance a, 32 sample resistance b, 4 shielding communication cable, 5 computers.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the description of one step is done to the utility model:
Embodiment one
As shown in Figure 1, frequency sweep analyser 1 output port Vs11 is directly connected with input port Va12, input port Va12 is connected with transformer 2 primary coil 21, transformer 2 secondary coil 22 is connected with sample resistance, sample resistance is connected with the input port Vb13 of frequency sweep analyser 1, and frequency sweep analyser 1 is also connected with computer 5.In order to effectively stop electromagnetic interference, reduce the bit error rate of Signal transmissions, above-mentioned connection all adopts shielding communication cable 4 to connect.
Have signal generator in frequency sweep analyser 1, high-speed collection card (not drawing in the drawings), described signal generator is connected with output port Vs11, can export the frequency of 0.05kHz-1MHz and the voltage of 10Vp-p.Because output port Vs11 is directly connected with input port Va12, so the frequency of input port Va12, voltage and phase place are always identical with phase place with the frequency of output port Vs11, voltage.The frequency of described high-speed collection card Gather and input port Va12, voltage and phase signal are as first reference signal.
Transformer 2 secondary coil 22 is connected with sample resistance, owing to can improve the transfer efficiency of transformer 2 when impedance matching, so will sample resistance a31 be selected to be connected in circuit according to the impedance magnitude of transformer 2 or sample resistance b32 is connected in circuit.What in the present embodiment, sample resistance a31 adopted is the platinum resistance of 0.2 Ω, the platinum resistance of what sample resistance b32 adopted is 0.5 Ω.
Sample resistance a31 or sample resistance b32 is connected with the input port Vb13 of frequency sweep analyser 1, because the primary coil 21 of voltage device and the number of turn of secondary coil 22 are changeless, so the magnitude of voltage of input port Vb13 is determined by the voltage of output port Vs11 and frequency.The phase place of input port Vb13 is then determined by the connected mode of transformer 2 and the frequency of output port Vs11.If now only change the frequency of output port Vs11, so the frequency of input port Vb13, voltage and phase place all can change along with the change of the frequency of output port Vs11.Certainly, the frequency of input port Vb13 always follows the frequency of output port Vs11 to be identical.The frequency of high-speed collection card Gather and input port Vb13, voltage and phase signal are as second reference signal.
The computer 5 normally notebook computer 5 that the utility model is used, high-speed collection card in frequency sweep analyser 1 is connected with notebook computer 5, the software contents such as frequency, voltage and phase signal being carried out to analyzing and processing is housed in notebook computer 5, when detecting transformer resonance frequency, keep the output voltage of the signal generator of frequency sweep analyser 1 constant, frequency is increased until 1MHz gradually from 0.05kHz.The frequency of the input port Vb13 of the frequency of the input port Va12 collected in this process, voltage and phase signal and collection, voltage and phase signal can all be input in computer 5 by high-speed collection card.
Above-mentioned computer software can provide the characteristic pattern of frequency and voltage, and the characteristic pattern of frequency and phase place.When the characteristic pattern of observed frequency and voltage, the numerical value of frequency represents by X-axis on the display of computer 5, and the value of voltage represents by Y-axis.Because the frequency of input port Va12 and the frequency of input port Vb13 remain synchronous, therefore can see on the display of computer 5 that frequency increases until 1MHz process from 0.05kHz gradually, input port Va12 and the magnitude of voltage of input port Vb13 corresponding to the Frequency point that each is identical.
When the characteristic pattern of observed frequency and phase place, the numerical value of frequency represents by X-axis on the display of computer 5, and the value of phase place represents by Y-axis.Because the frequency of input port Va12 and the frequency of input port Vb13 remain synchronous, therefore can see on the display of computer 5 that frequency increases until 1MHz process from 0.05kHz gradually, input port Va12 and the phase value of input port Vb13 corresponding to the Frequency point that each is identical.
Find out in the characteristic pattern of frequency and voltage, the magnitude of voltage difference of input port Va12 and input port Vb13 is maximum, and in the characteristic pattern of frequency and phase place, that frequency of phase place zero crossing.So this frequency is exactly the resonance frequency of transformer 2.In addition, the information of frequency, voltage and phase place also can export as excel form, for analysis reference by described computer software.
Obviously, under the prerequisite not departing from principle described in the utility model, the some improvement made or modification all should be considered as protection domain of the present utility model.
Claims (6)
1. a locomotive transformer resonance frequency pick-up unit, comprise frequency sweep analyser, sample resistance, computer, wherein frequency sweep analyser comprises signal generator, high-speed collection card, is characterized in that, the output port Vs of frequency sweep analyser is directly connected with input port Va, input port Va is connected with transformer, transformer secondary coil is connected with sample resistance, and sample resistance is connected with the input port Vb of frequency sweep analyser, and frequency sweep analyser is also connected with computer.
2. a kind of locomotive transformer resonance frequency pick-up unit according to claim 1, it is characterized in that, the signal generator in frequency sweep analyser is connected with output port Vs, makes output port Vs can export the frequency of 0.05kHz-1MHz and the voltage of 10Vp-p.
3. a kind of locomotive transformer resonance frequency pick-up unit according to claim 1, it is characterized in that, frequency sweep analyser output port Vs is directly connected with input port Va, makes the frequency of input port Va, voltage and phase place always identical with phase place with the frequency of output port Vs, voltage.
4. a kind of locomotive transformer resonance frequency pick-up unit according to claim 1, it is characterized in that, sample resistance has 2, selects sample resistance a or sample resistance b to be connected in circuit according to the impedance magnitude of transformer.
5. a kind of locomotive transformer resonance frequency pick-up unit according to claim 1, it is characterized in that, transformer secondary coil is connected with sample resistance, and sample resistance is connected with the input port Vb of frequency sweep analyser, and the magnitude of voltage of input port Vb is determined by the voltage of output port Vs and frequency.
6. a kind of locomotive transformer resonance frequency pick-up unit according to claim 1, it is characterized in that, frequency sweep analyser is connected with computer, and the high-speed collection card of frequency sweep analyser is transferred to computer from frequency, voltage and phase information that input port Va and input port Vb collects and processes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420751672.1U CN204203389U (en) | 2014-12-04 | 2014-12-04 | A kind of locomotive transformer resonance frequency pick-up unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420751672.1U CN204203389U (en) | 2014-12-04 | 2014-12-04 | A kind of locomotive transformer resonance frequency pick-up unit |
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| CN204203389U true CN204203389U (en) | 2015-03-11 |
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| CN201420751672.1U Expired - Fee Related CN204203389U (en) | 2014-12-04 | 2014-12-04 | A kind of locomotive transformer resonance frequency pick-up unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107576847A (en) * | 2017-09-07 | 2018-01-12 | 西南交通大学 | A kind of vehicular tractive power supply system impedance frequency characteristic measurement apparatus and its measuring method |
-
2014
- 2014-12-04 CN CN201420751672.1U patent/CN204203389U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107576847A (en) * | 2017-09-07 | 2018-01-12 | 西南交通大学 | A kind of vehicular tractive power supply system impedance frequency characteristic measurement apparatus and its measuring method |
| CN107576847B (en) * | 2017-09-07 | 2024-04-26 | 西南交通大学 | Impedance frequency characteristic measuring device and measuring method for vehicle-mounted traction power supply system |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150311 |