CN207133387U - A kind of series resonance using fixed duty cycle square wave frequency conversion power source is pressure-resistant local discharge test device - Google Patents
A kind of series resonance using fixed duty cycle square wave frequency conversion power source is pressure-resistant local discharge test device Download PDFInfo
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- CN207133387U CN207133387U CN201721178749.0U CN201721178749U CN207133387U CN 207133387 U CN207133387 U CN 207133387U CN 201721178749 U CN201721178749 U CN 201721178749U CN 207133387 U CN207133387 U CN 207133387U
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- partial discharge
- square wave
- power source
- duty cycle
- frequency conversion
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Abstract
It the utility model is related to a kind of pressure-resistant local discharge test device of series resonance using fixed duty cycle square wave frequency conversion power source, including 1: 1 fixed duty cycle square wave frequency conversion power source, it after exciting transformer pressure regulation by applying a voltage on test product cable, test product cable is parallel with partial discharge collector and is used to gather Partial discharge signal, and the Partial discharge signal, which is transmitted to partial discharge analysis system, to be analyzed；Because the switching point of the switching switch of variable-frequency power sources is always held in 0 degree and 180 degree, and this position is the point of zero voltage for exporting sine wave, he can be masked completely in partial discharge measurement, and has substantially no effect on measurement result.Partial discharge signal may be implemented in continuous acquisition when doing ac voltage withstanding, improve credibility and the degree of accuracy of partial discharge measurement signal.The noise reduction of Partial discharge signal can be also increased substantially by continuous acquisition, the fault location of partial discharge point is more prone to and accurately.
Description
Technical field
It the utility model is related to electric device field, specifically a kind of series connection using fixed duty cycle square wave frequency conversion power source
Resonance pressure-resistant local discharge test device.
Background technology
Before power circuit handing-over puts into operation or after maintenance, the inspection of state of insulation and assessment will be carried out to it,
Wherein ac voltage withstanding experiment is an experiment for having to do, and to be then developed recently get up measurement of partial discharge has insulation
State early diagnoses and a kind of more advanced detection means of prediction of the development trend function.
Pressure test typically has three kinds of boosting modes：Excute a law outside, multiple frequence actinobolia and series resonant method.Series resonant method
It is exactly using reactor and test product composition LC resonant tanks, by frequency modulation or adjusts the modes such as sense test loop is reached resonance shape
State, so as to produce a kind of method of high pressure on test item.But for measurement of partial discharge, boosting source has to noiseless
, the accuracy and confidence level measured otherwise will be influenceed, using Linear Power Amplifier pattern when being this current most of local discharge test
No partial discharge frequency conversion power supply, but the power-efficient is low, heating is big, volume is big and is not suitable for, and use the partial discharge of square wave frequency conversion power source
Pilot system dutycycle when it is due to pressure regulation power-efficient height, small volume is not fixed to be caused to produce during switching tube conducting shut-off
Raw burr interference can have an impact to partial discharge.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of string using fixed duty cycle square wave frequency conversion power source
Join resonance pressure-resistant local discharge test device, to solve defect present in prior art.
The technical scheme that the utility model solves above-mentioned technical problem is as follows：
A kind of series resonance using fixed duty cycle square wave frequency conversion power source is pressure-resistant local discharge test device, including fix at 1: 1
Dutycycle square wave frequency conversion power source (1), it after exciting transformer (2) pressure regulation by applying a voltage on test product cable (6), test product
Cable (6) is parallel with partial discharge collector (5) and is used to gather Partial discharge signal, and the Partial discharge signal is transmitted to partial discharge analysis system (3)
Analyzed；The switching point of the switching switch of 1: the 1 fixed duty cycle square wave frequency conversion power source (1) is always held at 0 degree and 180
On degree, and test voltage is adjusted by changing output square wave frequency；
Further, resonance reactor (4) is in series between the exciting transformer (2) and partial discharge collector (5), be used for
Limit higher hamonic wave；
The beneficial effects of the utility model are：Using 1: 1 fixed duty cycle square wave frequency conversion power source, resonance reactor, partial discharge
The pressure-resistant local discharge test system of frequency modulation series resonance of the compositions such as collector, the frequency of fundamental frequency square wave is exported by changing, to reach
With adjusting the mesh of test voltage.Because the switching point of the switching switch of variable-frequency power sources is always held in 0 degree and 180 degree, and this
Position is the point of zero voltage for exporting sine wave, he can be masked completely in partial discharge measurement, and has substantially no effect on measurement knot
Fruit.Partial discharge signal may be implemented in continuous acquisition when doing ac voltage withstanding, improve credibility and the degree of accuracy of partial discharge measurement signal.Pass through
Continuous acquisition can also increase substantially the noise reduction of Partial discharge signal, the fault location of partial discharge point is more prone to and accurately.
Brief description of the drawings
Fig. 1 is the utility model structure diagram；
Fig. 2 is utility model works principle schematic；
In accompanying drawing, the list of parts representated by each label is as follows：
1st, 1: 1 fixed duty cycle square wave frequency conversion power source, 2, exciting transformer, 3, partial discharge analysis system, 4, resonance reactor,
5th, partial discharge collector, 6, test product cable.
Embodiment
Principle of the present utility model and feature are described below in conjunction with accompanying drawing, example is served only for explaining this practicality
It is new, it is not intended to limit the scope of the utility model.
As shown in Figure 1-2, the pressure-resistant local discharge test device of a kind of series resonance using fixed duty cycle square wave frequency conversion power source,
Including 1: 1 fixed duty cycle square wave frequency conversion power source (1), it is by applying a voltage to test product electricity after exciting transformer (2) pressure regulation
On cable (6), test product cable (6) is parallel with partial discharge collector (5) and is used to gather Partial discharge signal, and the Partial discharge signal is transmitted to partial discharge
Analysis system (3) is analyzed；The switching point of the switching switch of 1: the 1 fixed duty cycle square wave frequency conversion power source (1) is protected always
Hold on 0 degree and 180 degree, and test voltage is adjusted by changing output square wave frequency；
Further, resonance reactor (4) is in series between the exciting transformer (2) and partial discharge collector (5), be used for
Limit higher hamonic wave；
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (2)
- A kind of 1. series resonance using fixed duty cycle square wave frequency conversion power source is pressure-resistant local discharge test device, it is characterised in that：Bag 1: 1 fixed duty cycle square wave frequency conversion power source (1) is included, it after exciting transformer (2) pressure regulation by applying a voltage to test product cable (6) on, test product cable (6) is parallel with partial discharge collector (5) and is used to gather Partial discharge signal, and the Partial discharge signal is transmitted to partial discharge point Analysis system (3) is analyzed；The switching point of the switching switch of 1: the 1 fixed duty cycle square wave frequency conversion power source (1) is always maintained at Test voltage is adjusted on 0 degree and 180 degree, and by changing output square wave frequency.
- A kind of 2. pressure-resistant local discharge test of series resonance using fixed duty cycle square wave frequency conversion power source according to claim 1 Device, it is characterised in that：Resonance reactor (4) is in series between the exciting transformer (2) and partial discharge collector (5), is used for Limit higher hamonic wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721178749.0U CN207133387U (en) | 2017-09-18 | 2017-09-18 | A kind of series resonance using fixed duty cycle square wave frequency conversion power source is pressure-resistant local discharge test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721178749.0U CN207133387U (en) | 2017-09-18 | 2017-09-18 | A kind of series resonance using fixed duty cycle square wave frequency conversion power source is pressure-resistant local discharge test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207133387U true CN207133387U (en) | 2018-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721178749.0U Withdrawn - After Issue CN207133387U (en) | 2017-09-18 | 2017-09-18 | A kind of series resonance using fixed duty cycle square wave frequency conversion power source is pressure-resistant local discharge test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207133387U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107526012A (en) * | 2017-09-18 | 2017-12-29 | 上海格鲁布科技有限公司 | A kind of series resonance using fixed duty cycle square wave frequency conversion power source is pressure-resistant local discharge test device |
-
2017
- 2017-09-18 CN CN201721178749.0U patent/CN207133387U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107526012A (en) * | 2017-09-18 | 2017-12-29 | 上海格鲁布科技有限公司 | A kind of series resonance using fixed duty cycle square wave frequency conversion power source is pressure-resistant local discharge test device |
| CN107526012B (en) * | 2017-09-18 | 2023-09-29 | 上海格鲁布科技有限公司 | Series resonance voltage-withstanding partial discharge test device adopting fixed duty ratio square wave variable frequency power supply |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180323 Effective date of abandoning: 20230929 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180323 Effective date of abandoning: 20230929 |