CN204214989U - The winding defect diagonsis instrument of electrical network primary winding kind equipment - Google Patents
The winding defect diagonsis instrument of electrical network primary winding kind equipment Download PDFInfo
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- CN204214989U CN204214989U CN201420710905.3U CN201420710905U CN204214989U CN 204214989 U CN204214989 U CN 204214989U CN 201420710905 U CN201420710905 U CN 201420710905U CN 204214989 U CN204214989 U CN 204214989U
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- kind equipment
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- 238000004804 winding Methods 0.000 title claims abstract description 44
- 230000007547 defect Effects 0.000 title claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 230000003534 oscillatory effect Effects 0.000 description 4
- 230000036541 health Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Abstract
The utility model relates to the winding defect diagonsis instrument of electrical network primary winding kind equipment; this diagnostic equipment comprises: direct supply; described direct supply forms series loop with the charge protection resistance be connected successively, reometer and tested winding, and the two ends of described tested winding are also connected to capacitor and oscillograph.Described defect diagonsis instrument can judge at the initial stage of coil kind equipment winding developing fault, thus adopts an effective measure in advance, avoids defect to continue development, in advance remover apparatus hidden danger.
Description
Technical field
The utility model relates to the winding defect diagonsis instrument of electrical network primary winding kind equipment.
Background technology
At present, there is limitation in the nascent test diagnosis means for its defect of coil kind equipment, as the shorted-turn fault of the series connection air reactor in Capacitor banks; The turn-to-turn short circuit of the winding of transformer, reactor and winding deformation defect diagonsis; Especially for the winding of series connection air reactor, dry reactor and the change of dry type station at the incipient defect of its winding interturn short-circuit, the means such as the direct current resistance test of current existing insulating monitoring and winding cannot detect the fault of the type.
Summary of the invention
For above the deficiencies in the prior art, the utility model provides a kind of winding defect diagonsis instrument of electrical network primary winding kind equipment.
The purpose of this utility model is achieved through the following technical solutions:
The winding defect diagonsis instrument of electrical network primary winding kind equipment; this diagnostic equipment comprises: direct supply; described direct supply forms series loop with the charge protection resistance be connected successively, reometer and tested winding, and the two ends of described tested winding respectively and be connected to capacitor and oscillograph.
Described charge protection resistance is 100
to 500
.
Described capacitor air reactor inductance value is between 1H to 5H.
Described oscillograph is portable fault oscillograph.
The utility model has the advantage of:
Can judge at the initial stage of the developing fault of coil kind equipment winding, thus adopt an effective measure in advance, defect is avoided to continue development, remover apparatus hidden danger in advance, thus avoid the generation of accident, avoid coil class because winding exists expansionary insulation fault, finally cause insulation breakdown, the major accident of phase fault or ground short circuit.
Accompanying drawing explanation
Fig. 1: the utility model structure principle chart;
Wherein L---tested winding; R1---charge protection resistance;
C---standard capacitance; A---reometer.
Fig. 2: the voltage oscillogram of oscillograph record.
Embodiment
The specific embodiment of the present invention is described in detail below in conjunction with drawings and Examples:
As shown in Figure 1; the winding defect diagonsis instrument of electrical network primary winding kind equipment comprises: direct supply; described direct supply forms series loop with the charge protection resistance be connected successively, reometer and tested winding, and the two ends of described tested winding are also connected to electric capacity and oscillograph.
Charge protection resistance R
1general employing 100
to 500
direct current resistance, reometer adopts maximum range to be the class of accuracy of 5A to be the general measure reometer of 0.5; Closing a floodgate moment for standard capacitance charging like this, electric capacity can be considered short circuit, and now maximum charging current is between 0.44A to 2.2A, and the present embodiment adopts 100
direct current resistance, therefore be 2.2A at charging combined floodgate moment maximum charging current; Along with the charge accumulation between standard capacitance pole plate, charging current will reduce gradually, until standard capacitance both end voltage is
time, now reometer display electric current is 0, and charging process is complete.The selection of standard capacitance: in general electric system, shnt capacitor air reactor inductance value is between 1H to 5H, due to its frequency during free oscillation
; Therefore standard capacitor-value its frequency larger has little; Therefore the capacitance of standard capacitance can be selected to be 0.01F; The jumbo standard capacitance of more than 100pF not easily makes, usual employing is with the equivalent capacity mode of coupling transformer or computing discharger, with electric capacity volume and the cost of manufacture of debasing the standard, the present embodiment is equipped with the standard capacitor of 0.01F, during test, the concussion frequency of oscillatory circuit is between 10000Hz to 100000Hz.Therefore oscillograph can adopt portable fault oscillograph, and its voltage sample frequency is between 5000Hz to 1000000Hz.
During actual test, turn on the electricity according to Fig. 1, first close K1, disconnects K2 and charge to standard capacitance, when reometer A pointer is zero, then charge complete; Now disconnect K1, close K2; Utilize oscillograph to carry out voltage waveform sampling to oscillatory process, general 3s to 5s is just passable.Be completed rear attention fully to discharge to standard capacitance.Voltage waveform as shown in Figure 2 can be obtained from oscillograph:
T in figure
1for the oscillation period of oscillatory process, obtain winding by on-the-spot and each coil kind equipment (L corresponding in Fig. 1) and set up free-running circuit, the voltage waveform of its oscillatory process is sampled, apparatus for establishing database, analysis is compared to all previous waveform that records, just can judge that the general level of the health (mainly to initial stage turn-to-turn short circuit, winding deformation etc.) of its winding carries out analyzing, judging.For the three-phase air reactor that " one " font or " product " shape are installed, because its alternate symmetry can also compare analysis alternate, to judge the general level of the health of tested winding.
Advantage of the present utility model:
1, invest little, on-the-spot set up circuit simple possible;
2, test process to the insulation of tested equipment and the general level of the health without harm;
3, sensitivity is high, is sampled to waveform by oscillograph, can amplify the incipient failure of winding;
Strong interference immunity, its free oscillation waveform does not disturb by external electromagnetic field substantially.
Should be appreciated that above is illustrative and not restrictive by preferred embodiment to the detailed description that technical scheme of the present invention is carried out.Those of ordinary skill in the art can modify to the technical scheme described in each embodiment on the basis of reading instructions of the present invention, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (4)
1. the winding defect diagonsis instrument of electrical network primary winding kind equipment; it is characterized in that; this diagnostic equipment comprises: direct supply; described direct supply forms series loop with the charge protection resistance be connected successively, reometer and tested winding, and the two ends of described tested winding respectively and be connected to capacitor and oscillograph.
2. the winding defect diagonsis instrument of electrical network primary winding kind equipment according to claim 1, is characterized in that, described charge protection resistance is 100
to 500
.
3. the winding defect diagonsis instrument of electrical network primary winding kind equipment according to claim 1, is characterized in that, described capacitor air reactor inductance value is between 1H to 5H.
4. the winding defect diagonsis instrument of electrical network primary winding kind equipment according to claim 1, is characterized in that, described oscillograph is portable fault oscillograph.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420710905.3U CN204214989U (en) | 2014-11-24 | 2014-11-24 | The winding defect diagonsis instrument of electrical network primary winding kind equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420710905.3U CN204214989U (en) | 2014-11-24 | 2014-11-24 | The winding defect diagonsis instrument of electrical network primary winding kind equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204214989U true CN204214989U (en) | 2015-03-18 |
Family
ID=52983651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420710905.3U Active CN204214989U (en) | 2014-11-24 | 2014-11-24 | The winding defect diagonsis instrument of electrical network primary winding kind equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204214989U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107102245A (en) * | 2017-06-09 | 2017-08-29 | 云南电网有限责任公司电力科学研究院 | Deformation of transformer winding and condenser bushing failure detector and method |
-
2014
- 2014-11-24 CN CN201420710905.3U patent/CN204214989U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107102245A (en) * | 2017-06-09 | 2017-08-29 | 云南电网有限责任公司电力科学研究院 | Deformation of transformer winding and condenser bushing failure detector and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |