CN203405544U - Novel portable magnetic power frequency resonance test transformer - Google Patents
Novel portable magnetic power frequency resonance test transformer Download PDFInfo
- Publication number
- CN203405544U CN203405544U CN201320524670.4U CN201320524670U CN203405544U CN 203405544 U CN203405544 U CN 203405544U CN 201320524670 U CN201320524670 U CN 201320524670U CN 203405544 U CN203405544 U CN 203405544U
- Authority
- CN
- China
- Prior art keywords
- transformer
- transformers
- novel portable
- frequency resonance
- portable magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a novel portable magnetic power frequency resonance test transformer comprising a 220V plug, a power supply control device, two ferroresonant transformers, two boost transformer modules and a capacitive voltage divider. The 220V plug is connected with the two ferroresonant transformers via the power supply control device, the two ferroresonant transformers are in parallel connection and are respectively connected with the two ferroresonant transformers, and the capacitive voltage divider, the two ferroresonant transformers and an object to be tested are in parallel connection. The novel portable magnetic power frequency resonance test transformer is of reasonable structure design that boost transformers and adjustable reactors are combined as an integral body. Based on a conventional test transformer, a direct current magnetic bias control function is added to a transformer core, so that parallel resonance on the excitation impedance of the transformer and the capacitive reactance of the object to be tested is achieved according to the direct current magnetic bias on the transformer core.
Description
Technical field
The utility model relates to magnetic double purpose transformer for line-frequency resonance test technical field, particularly a kind of novel portable magnetic double purpose transformer for line-frequency resonance test.
Background technology
Testing transformer is mainly used in carrying out withstand voltage test to electrical equipment or device, to find out insulation defect or the hidden danger of test specimen.In withstand voltage test process, trial voltage is added in the insulation of test specimen can produce capacitive reactive power electric current, and the larger test current of ground capacitance of test specimen is also larger, and the power needing is also just larger.Therefore the load of testing transformer is pure capacitive reactive power load.For the power equipment of large capacitance, as crosslinked polyethylene mesolow/high pressure/ultrahigh voltage power cable (XLPE), totally-enclosed high-voltage combined electrical apparatus (G work S), generator unit stator, high-power transformer, overhead power line, power capacitor etc., common low-tension supply cannot meet the requirement of capacity of experiment.Because testing transformer institute on-load is all capacitive reactive power, therefore can be by providing the identical idle way compensating of perception to reduce the capacity of power supply.When using a reactor that its reactance value is equated with test product capacitor value, if reactor is connected with test product, form series resonance test loop, if reactor is in parallel with test product, form parallel resonance test loop, while there is resonance, the perception of reactor is idle to be offset completely with capacitive reactive power test product, power supply only need to provide very little active power, during Resonance Voltage Withstand Test technology that Here it is.According to the difference of reactance value regulative mode, during Resonance Voltage Withstand Test technology has variable-frequency series-resonance transformer, machinery to adjust gap to adjust sense industrial frequency resonance transformer and magnetic industrial frequency resonance transformer etc.
Adjustable air gap iron-core reactor resonance transformer regulates air gap unshakable in one's determination to make the reactance value of reactor equate to occur serial or parallel connection resonance with test product capacitor value by mechanical transmission mechanism, the advantage of this method is resonance under power frequency, operation is also convenient, shortcoming is that mechanical transmission mechanism governor motion will bear very large electric power, cause that noise is large, mission life is short, and small product size weight is all large, be not easy to mobile.
Utility model content
For above-mentioned deficiency, the utility model object is to provide a kind of reasonable in design, ingenious, novel portable magnetic double purpose transformer for line-frequency resonance test easy to use.
For achieving the above object, the technical scheme providing is the utility model:
A kind of novel portable magnetic double purpose transformer for line-frequency resonance test, it comprises that 220V plug, power control, two ferroresonance transformers, two boost and becomes module and capacitive divider, described 220V plug is connected with two ferroresonance transformers respectively by described power control, two boost becomes module and is in parallel, and be connected with two ferroresonance transformers respectively, described capacitive divider is in parallel with two ferroresonance transformers and tested product respectively.
As a kind of improvement of the present utility model, described in boost become module comprise at the most four successively series boosting become unit.
As a kind of improvement of the present utility model, described in the power that becomes unit that boosts be 21kV/0.1A.
As a kind of improvement of the present utility model, described power control comprises power controling box and the monitoring backstage being connected with this power controling box.
As a kind of improvement of the present utility model, first by boosting, become boosting in module and become unit and connect, then in low-pressure side by the magnetic resonance weighing apparatus capacitive reactive power electric current that flattens.
As a kind of improvement of the present utility model, described in boost and become module and can only boost and become unit and connect successively by four at most, the power that becomes unit that boosts is 21kV/0.1A, becomes that unit combination can obtain 21,42,63, the trial voltage of 84kV by series boosting.
As a kind of improvement of the present utility model, when need expand capacity, two boost become module by after first string and principle wiring, during single group string, be 0.1A, two groups and time be 0.2A.
As a kind of improvement of the present utility model, a ferroresonance transformer is joined in every four change unit that boost, and four of less thaies are boosted while becoming unit, also join a ferroresonance transformer.
As a kind of improvement of the present utility model, under rated current, stream time is 90min, and under 1.2 times of rated current, stream time is 10min.Effectively promote overload protection ability, and then reduce maintenance cost, guarantee the stability of work, greatly increase the service life.
The beneficial effects of the utility model are: reasonable in design of the present utility model, dexterously step-up transformer and REgulatable reactor are integrated, the utility model product is on the basis of conventional test transformer, transformer core have been increased to DC magnetic biasing to control function, by the DC magnetic biasing to unshakable in one's determination, makes the excitation impedance of transformer and the capacitive reactance of test product realize parallel resonance.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram that the magnetic resonance in the utility model becomes.
Fig. 2 is that the magnetic in the utility model is adjusted sense schematic diagram.
Fig. 3 is the figure that makes a practical application of a principle of the utility model product.
Fig. 4 is the structural representation of the utility model product.
Embodiment
Embodiment: referring to Fig. 1, be the fundamental diagram that magnetic resonance becomes.For common transformer, excitation impedance X
mvery large, exciting current I
mvery little, test current I
xpress basic mains side, the i.e. I of all flowing into of transformer voltage ratio
o≈ I
x(I
xconversion is to mains side).If change magnetic permeability unshakable in one's determination, X by DC magnetic biasing
mdecline, I
mincrease, work as I
m=-I
xtime, I
o≈ 0, is now that the excitation induction reactance of transformer equates with test product capacitive reactance to form parallel resonance, and output power of power supply only has active power.Therefore in fact magnetic resonance change is exactly the adjustable testing transformer of a kind of excitation impedance.
Referring to Fig. 2, for magnetic is adjusted sense schematic diagram, by pressure regulator D and magnetic transformer high pressure winding W
2provide test product required trial voltage, feedback transformer Tf and rectifier are by test current I
xafter converting by a certain percentage DC current to, inject field copper W
dgive DC magnetic biasing unshakable in one's determination, by adjusting the no-load voltage ratio control DC current size of feedback transformer, make AC excitation electric current and test current I
xequate, exchange perceptual exciting current and capacitive test current and offset only remaining active current of rear source current.
Referring to Fig. 3, be the figure that makes a practical application of a principle of the utility model product.First will boost becomes module and is designed to Cascade structure, then in low-pressure side by the magnetic resonance weighing apparatus capacitive reactive power electric current that flattens, the insulation system that high-potting becomes has been simplified in this measure, makes the utility model product can make dry type, is convenient to transportation.
Referring to Fig. 4, the utility model embodiment provides a kind of novel portable magnetic double purpose transformer for line-frequency resonance test, it comprises that 220V plug 1, power control 2, two ferroresonance transformers 3, two boost and becomes module 4 and capacitive divider 5, described 220V plug 1 is connected with two ferroresonance transformers 3 respectively by described power control 2, two boost becomes module 4 and is in parallel, and be connected with two ferroresonance transformers 3 respectively, described capacitive divider 5 is in parallel with two ferroresonance transformers 3 and tested product 6 respectively.
The described change module 4 that boosts comprises four series boosting change unit successively at the most.The described power that boosts change unit is 21kV/0.1A.
Described power control 2 comprises power controling box 21 and the monitoring backstage 22 being connected with this power controling box 21.
The announcement of book and instruction according to the above description; the utility model those skilled in the art can also change and revise above-mentioned embodiment; as described in the utility model above-described embodiment; other transformer that adopts structure same or analogous with it and obtain, all in the utility model protection domain.
Claims (4)
1. a novel portable magnetic double purpose transformer for line-frequency resonance test, it is characterized in that, it comprises that 220V plug, power control, two ferroresonance transformers, two boost and becomes module and capacitive divider, described 220V plug is connected with two ferroresonance transformers respectively by described power control, two boost becomes module and is in parallel, and be connected with two ferroresonance transformers respectively, described capacitive divider is in parallel with two ferroresonance transformers and tested product respectively.
2. a kind of novel portable magnetic double purpose transformer for line-frequency resonance test according to claim 1, is characterized in that, described in boost become module comprise at the most four successively series boosting become unit.
3. a kind of novel portable magnetic double purpose transformer for line-frequency resonance test according to claim 2, is characterized in that, described in the power that becomes unit that boosts be 21kV/0.1A.
4. a kind of novel portable magnetic double purpose transformer for line-frequency resonance test according to claim 1, is characterized in that, described power control comprises power controling box and the monitoring backstage being connected with this power controling box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320524670.4U CN203405544U (en) | 2013-08-27 | 2013-08-27 | Novel portable magnetic power frequency resonance test transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320524670.4U CN203405544U (en) | 2013-08-27 | 2013-08-27 | Novel portable magnetic power frequency resonance test transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203405544U true CN203405544U (en) | 2014-01-22 |
Family
ID=49941474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320524670.4U Expired - Fee Related CN203405544U (en) | 2013-08-27 | 2013-08-27 | Novel portable magnetic power frequency resonance test transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203405544U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115877152A (en) * | 2023-02-27 | 2023-03-31 | 国网江西省电力有限公司电力科学研究院 | Power frequency resonance system and method for detecting insulation state of transmission cable |
-
2013
- 2013-08-27 CN CN201320524670.4U patent/CN203405544U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115877152A (en) * | 2023-02-27 | 2023-03-31 | 国网江西省电力有限公司电力科学研究院 | Power frequency resonance system and method for detecting insulation state of transmission cable |
| CN115877152B (en) * | 2023-02-27 | 2023-07-04 | 国网江西省电力有限公司电力科学研究院 | Power frequency resonance system and method for detecting insulation state of power transmission cable |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102175956B (en) | Long duration induction voltage withstand test device of ultrahigh-voltage transformer | |
| CN109521338B (en) | Frequency conversion parallel resonance voltage withstand test method based on cascade voltage boosting | |
| CN104579070B (en) | Contactless on-load automatic regulating distribution transformer and the method for carrying out automatic Regulation | |
| Rai et al. | Voltage regulation of self excited induction generator using passive elements | |
| CN203025270U (en) | Full-power test device for high-voltage frequency converter | |
| CN101309011A (en) | Magnet controlled voltage regulating imaginary power automatic compensation method and device | |
| CN104810839A (en) | Reactive power compensation method for transformer | |
| CN201955438U (en) | Ultra high voltage transformer long-time induced over voltage withstand test device | |
| CN207650291U (en) | A kind of vehicular industrial frequency AC Withstand test device based on controlled reactor | |
| Abduraxmonov | REACTIVE POWER. REACTIVE POWER COMPENSATION. | |
| CN203405544U (en) | Novel portable magnetic power frequency resonance test transformer | |
| CN204116477U (en) | A kind of high-voltage reactive load test platform | |
| CN104716652A (en) | Magnetically controlled shunt reactor | |
| CN104362670A (en) | Non-schedulable solar power generation and mains supply complementary system | |
| CN204967289U (en) | Electric current mutual inductance of wide current range work is got can power | |
| CN107086573B (en) | Plug-and-play integrated modular active series compensator | |
| CN104422855A (en) | Portable magnetic power frequency resonance test transformer and working method thereof | |
| CN203405543U (en) | Novel 220 KV vehicle-mounted type magnetic power frequency resonance test transformer | |
| CN208092176U (en) | A kind of high-pressure magnetic industrial frequency resonance pressure-resistant apparatus | |
| CN204065365U (en) | A kind of large-scale AC motor no-load test device | |
| CN203405541U (en) | Novel 110 KV vehicle-mounted type magnetic power frequency resonance test transformer | |
| CN103094906A (en) | 750 kV magnetic-control type controllable highly resistance circuit based on compensation winding energy-getting excitation | |
| CN207705784U (en) | A kind of energy saver for transformer in solar power plant | |
| CN203180788U (en) | Ship-used 60 Hz shore power supply multi-level high-voltage frequency converter | |
| CN201663041U (en) | High-impedance transformer for solar power generation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140122 Termination date: 20150827 |
|
| EXPY | Termination of patent right or utility model |