CN206258539U - Voltage transformer turn-to-turn short circuit detection means - Google Patents
Voltage transformer turn-to-turn short circuit detection means Download PDFInfo
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- CN206258539U CN206258539U CN201621363656.0U CN201621363656U CN206258539U CN 206258539 U CN206258539 U CN 206258539U CN 201621363656 U CN201621363656 U CN 201621363656U CN 206258539 U CN206258539 U CN 206258539U
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- 238000001514 detection method Methods 0.000 title claims abstract description 30
- 238000005070 sampling Methods 0.000 claims abstract description 28
- 230000005611 electricity Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a kind of voltage transformer turn-to-turn short circuit detection means, including：Impulse voltage generator, voltage transformer to be measured, sampling resistor, voltage collecting device；Impulse voltage generator is connected with the high-pressure side of voltage transformer to be measured, and the low-pressure end of voltage transformer to be measured is connected with one end of sampling resistor, the other end ground connection of sampling resistor；Sampling resistor is in parallel with voltage collecting device；Impulse voltage generator is used to for the surge voltage of generation to put on voltage transformer to be measured；Voltage collecting device is used to gather the voltage at sampling resistor two ends, and the voltage is used to analyze voltage transformer to be measured with the presence or absence of turn-to-turn short circuit.Using voltage transformer turn-to-turn short circuit detection means can effectively detection voltage transformer shorted-turn fault.
Description
Technical field
The utility model is related to Relay Protection Technology in Power System field, more particularly to a kind of voltage transformer turn-to-turn short circuit
Detection means.
Background technology
In recent years, the failure of a lot of voltage transformer turn-to-turn short circuits is occurred in that, considerable influence is brought to production run.And it is electric
The turn-to-turn short circuit of transformer is pressed, common detection methods are D.C. resistance detection, no-load current detection, frequency tripling resistance test and change
Than detection.But the above method is more difficult to determine turn-to-turn short circuit completely, and for turn-to-turn short circuit not very serious voltage transformer, direct current
Resistance detection, no-load current detection and no-load voltage ratio detection are all difficult to pinpoint the problems, and frequency tripling resistance test is even more due to average mark
The voltage for being fitted on each turn-to-turn is smaller, is difficult to find the incipient fault of turn-to-turn sometimes.Therefore, in the urgent need to studying new detection electricity
The means of transformer shorted-turn fault are pressed, is solved the above problems.
For the new detection means of turn-to-turn short circuit, existing researcher is proposed at secondary coil with changeable frequency
Voltage signal is input into, while measuring impedance, when frequency is higher, the impedance variations that turn-to-turn short circuit is formed are more obvious.But
The method is substantially at theoretical research stage, and can produce the more difficult acquisition of voltage signal source of the changeable frequency of high voltage signal,
It is relatively costly.The voltage signal source of general adjustable frequency, its output voltage is general less than 20kV.
Utility model content
The utility model embodiment provides a kind of voltage transformer turn-to-turn short circuit detection means, and the device includes：Impact
Voltage generator, voltage transformer to be measured, sampling resistor, voltage collecting device；
Impulse voltage generator is connected with the high-pressure side of voltage transformer to be measured, the low-pressure end of voltage transformer to be measured with adopt
One end connection of sample resistance, the other end ground connection of sampling resistor；Sampling resistor is in parallel with voltage collecting device；
The impulse voltage generator is used to produce surge voltage, and the surge voltage is put on into mutual induction of voltage to be measured
Device；
The voltage collecting device is used to gather the voltage at sampling resistor two ends, and the voltage is mutual for analyzing voltage to be measured
Sensor whether there is turn-to-turn short circuit.
In one embodiment, the voltage collecting device is oscillograph.
In one embodiment, also include：Protection device, the protection device is in parallel with sampling resistor；
The protection device is used to protect impulse voltage generator, sampling resistor and voltage collecting device.
In one embodiment, the protection device is discharge tube or other equipment for suppressing voltage.
In one embodiment, also include：Impulse voltage divider；
One end of impulse voltage divider is connected with the high-pressure side of voltage transformer to be measured, impulse voltage divider it is another
End ground connection；
The impulse voltage divider is used to measure the surge voltage of impulse voltage generator generation.
In the utility model embodiment, surge voltage is produced by impulse voltage generator, and surge voltage is applied
In voltage transformer to be measured, the voltage at sampling resistor two ends is gathered by voltage collecting device, the voltage is used to analyze to be measured
Voltage transformer whether there is turn-to-turn short circuit.Compared with existing voltage transformer turn-to-turn short circuit detection means, using this practicality
Novel voltage mutual inductor turn-to-turn short circuit detection means can produce the voltage signal source of the changeable frequency of high voltage signal without searching,
It is cost-effective using existing impulse voltage generator.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of voltage transformer turn-to-turn short circuit structure of the detecting device schematic diagram that the utility model embodiment is provided
One；
Fig. 2 is a kind of voltage transformer turn-to-turn short circuit structure of the detecting device schematic diagram that the utility model embodiment is provided
Two.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole realities
Apply example.Based on the embodiment in the utility model, those of ordinary skill in the art institute under the premise of creative work is not made
The every other embodiment for obtaining, belongs to the scope of the utility model protection.
The reason for turn-to-turn short circuit means of testing of the prior art can not find potential turn-to-turn insulation hidden danger be：Direct current
The voltage that resistance detection and no-load current detection apply is relatively relatively low, is difficult to find still there is certain insulating properties but existing potential wind
The inter-turn insulation of danger, when coming from experiment, turn-to-turn not yet punctures.Therefore, attempt with the operation of exportable higher voltage grade
Impact device, detection turn-to-turn insulation is a kind of effective means, punctures turn-to-turn insulation in moment and is reflected on curve.In addition, resistance
Resist (Z=2 π f*L, Z impedance, f test frequencies, L inductance) closely related with frequency, when frequency increases, the change of impedance is more
It is sensitive, it helps by contrast experiment, the change of impedance to be found, so as to find inter-turn insulation.Lightning impulse is a kind of
Cover the signal source of multi-frequency voltage signal, there is more high-frequency signal, can effectively detect the change of impedance.
Based on this, the utility model proposes a kind of voltage transformer turn-to-turn short circuit detection means, as shown in figure 1, the device
Including：Impulse voltage generator 1, voltage transformer to be measured 2, sampling resistor 3, voltage collecting device 4；
Impulse voltage generator 1 is connected with the high-pressure side of voltage transformer to be measured 2, the low-pressure end of voltage transformer to be measured 2
One end with sampling resistor 3 is connected, the other end ground connection of sampling resistor 3；Sampling resistor 3 is in parallel with voltage collecting device 4；Its
In, impulse voltage generator 1 is used to produce surge voltage, and surge voltage is put on into voltage transformer to be measured 2；Voltage acquisition
Device 4 is used to gather the voltage at the two ends of sampling resistor 3, and the voltage is used to analyze voltage transformer to be measured 2 with the presence or absence of turn-to-turn
Short circuit.
During specific implementation, impulse voltage generator 1 be mainly used in the test products such as power equipment carry out lightning impulse voltage all-wave,
The impulse voltage test of lightning impulse voltage wave chopping and operating impulse voltage ripple, checks insulating properties.Voltage collecting device 4 can be with
It is any kind of voltage collecting device, such as, universal meter.The utility model gathers the two ends of sampling resistor 3 using oscillograph
Voltage.Sampling resistor 3 uses noninductive resistance (non-inductance resistor).
During specific implementation, as shown in Fig. 2 the utility model voltage transformer turn-to-turn short circuit detection means can also include：
Protection device 5, it is in parallel with sampling resistor 4, it is mainly used in impulse voltage generator 1, sampling resistor 3 and voltage collecting device 4
Protected.Specifically, protection device 5 can use discharge tube.Discharge tube is that a kind of high pressure for being used in equipment input is protected
Protection element.If the voltage at its two ends exceeds its protection specification value, short circuit phenomenon occurs inside it, and sponge the mistake of input
High pressure.Protection device 5 can also be using the equipment of other suppression voltages.
As shown in Fig. 2 the utility model voltage transformer turn-to-turn short circuit detection means can also include：Surge voltage partial pressure
Device 6；One end of impulse voltage divider 6 is connected with the high-pressure side of voltage transformer to be measured 4, impulse voltage divider 6 it is another
End ground connection.It is the surge voltage produced for quantitative measurment impulse voltage generator 1 using the effect of impulse voltage divider 6,
The surge voltage for preventing impulse voltage generator 1 from producing is excessive, damages voltage transformer 2 to be measured.
The utility model proposes voltage transformer turn-to-turn short circuit detection means be applied to the electricity of dry type and solid insulation formula
Pressure transformer, general its principle is electromagnetic potential transformer.CVT (Continuously Variable Transmission,
Capacitance type potential transformer) in the turn-to-turn insulation situation of middle pressure transformer coil can also be examined with the utility model device
Survey.
Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for this
For the technical staff in field, the utility model embodiment can have various modifications and variations.It is all in spirit of the present utility model
Within principle, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.
Claims (5)
1. a kind of voltage transformer turn-to-turn short circuit detection means, it is characterised in that including：Impulse voltage generator, voltage to be measured
Transformer, sampling resistor, voltage collecting device；
Impulse voltage generator is connected with the high-pressure side of voltage transformer to be measured, low-pressure end and the sampling electricity of voltage transformer to be measured
One end connection of resistance, the other end ground connection of sampling resistor；Sampling resistor is in parallel with voltage collecting device；
The impulse voltage generator is used to produce surge voltage, and the surge voltage is put on into voltage transformer to be measured；
The voltage collecting device is used to gather the voltage at sampling resistor two ends, and the voltage is used to analyze voltage transformer to be measured
With the presence or absence of turn-to-turn short circuit.
2. voltage transformer turn-to-turn short circuit detection means as claimed in claim 1, it is characterised in that the voltage collecting device
It is oscillograph.
3. voltage transformer turn-to-turn short circuit detection means as claimed in claim 1, it is characterised in that also include：Protection device,
The protection device is in parallel with sampling resistor；
The protection device is used to protect impulse voltage generator, sampling resistor and voltage collecting device.
4. voltage transformer turn-to-turn short circuit detection means as claimed in claim 3, it is characterised in that the protection device is to put
Fulgurite or other equipment for suppressing voltage.
5. voltage transformer turn-to-turn short circuit detection means as claimed in claim 1, it is characterised in that also include：Surge voltage
Divider；
One end of impulse voltage divider is connected with the high-pressure side of voltage transformer to be measured, another termination of impulse voltage divider
Ground；
The impulse voltage divider is used to measure the surge voltage of impulse voltage generator generation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621363656.0U CN206258539U (en) | 2016-12-13 | 2016-12-13 | Voltage transformer turn-to-turn short circuit detection means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621363656.0U CN206258539U (en) | 2016-12-13 | 2016-12-13 | Voltage transformer turn-to-turn short circuit detection means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206258539U true CN206258539U (en) | 2017-06-16 |
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ID=59028477
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621363656.0U Active CN206258539U (en) | 2016-12-13 | 2016-12-13 | Voltage transformer turn-to-turn short circuit detection means |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526406A (en) * | 2016-12-13 | 2017-03-22 | 华北电力科学研究院有限责任公司 | Inter-tern short-circuit detection device, analysis method and device for voltage transformer |
| CN107831356A (en) * | 2017-12-07 | 2018-03-23 | 广东电网有限责任公司电力科学研究院 | A kind of transformer transient overvoltage and sleeve pipe dielectric loss signal synchronous collection device |
| CN109521391A (en) * | 2019-01-23 | 2019-03-26 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | The detection device and method of generator voltage mutual inductor winding interturn short-circuit failure |
-
2016
- 2016-12-13 CN CN201621363656.0U patent/CN206258539U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526406A (en) * | 2016-12-13 | 2017-03-22 | 华北电力科学研究院有限责任公司 | Inter-tern short-circuit detection device, analysis method and device for voltage transformer |
| CN107831356A (en) * | 2017-12-07 | 2018-03-23 | 广东电网有限责任公司电力科学研究院 | A kind of transformer transient overvoltage and sleeve pipe dielectric loss signal synchronous collection device |
| CN107831356B (en) * | 2017-12-07 | 2023-05-23 | 广东电网有限责任公司电力科学研究院 | Transformer transient overvoltage and sleeve dielectric loss signal synchronous acquisition device |
| CN109521391A (en) * | 2019-01-23 | 2019-03-26 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | The detection device and method of generator voltage mutual inductor winding interturn short-circuit failure |
| CN109521391B (en) * | 2019-01-23 | 2024-02-09 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Device and method for detecting turn-to-turn short circuit fault of generator voltage transformer winding |
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