CN202057764U - Variable frequency resonance voltage withstand test device - Google Patents
Variable frequency resonance voltage withstand test device Download PDFInfo
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- CN202057764U CN202057764U CN2011201500919U CN201120150091U CN202057764U CN 202057764 U CN202057764 U CN 202057764U CN 2011201500919 U CN2011201500919 U CN 2011201500919U CN 201120150091 U CN201120150091 U CN 201120150091U CN 202057764 U CN202057764 U CN 202057764U
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- voltage withstand
- variable frequency
- test device
- frequency conversion
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- 238000004804 winding Methods 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 239000012212 insulator Substances 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a voltage withstand test device, specifically to a variable frequency resonance voltage withstand test device capable of adjusting frequencies within a certain range during induced voltage withstand and partial discharge tests of large transformers. The variable frequency resonance voltage withstand test device comprises a variable frequency power source and an intermediate transformer. Two ends of a high-voltage winding of the intermediate transformer are connected with reactors in parallel. During the induced voltage withstand and partial discharge tests of the large power transformers, no matter how different are voltage classes and capacities of the tested transformers, the variable frequency resonance voltage withstand test device is capable of adjusting the frequencies through adjustable compensating reactors and thus guarantees that variable frequency power source resonance device test frequencies are maintained in a range from 100Hz to 250Hz during working, thereby enabling the smooth progress of the operations of induced voltage withstand and partial discharge tests of various large power transformers and reducing input cost of experimental facilities.
Description
Technical field
The utility model relates to a kind of Withstand test device, relates in particular to a kind of frequency conversion resonance vibration pressure-proof test unit of frequency can regulate the withstand voltage and partial discharge test of high-power transformer induction within the specific limits the time.
Background technology
With improving supply frequency, reduce exciting current and reach and improve the purpose that applies voltage and be applicable to that the transformer of graded insulation carries out withstand voltage test.As tested transformer is taked suitable wiring, the master of transformer, minor insulation are examined simultaneously.Should improve test frequency for preventing that tested transformer core is saturated, unsuitable again frequency is too high.Fig. 1 is the key wiring diagram of present resonance pressure-resistant test unit, when the resonance pressure-resistant test unit of this structure is responded to withstand voltage and shelf depreciation to large-scale power transformer, because the difference of test product electric pressure, amount of capacity, many times variable-frequency power sources resonance device test frequency is difficult to guarantee the frequency of operation at 100～250Hz, can not satisfy the requirement of various high-power transformer test frequency.This just causes measuring the different variable-frequency power sources resonance device of transformer needs of different test product electric pressures, amount of capacity, increased greatly and responded to withstand voltage and equipment input cost local discharge test device to large-scale power transformer, this has become puzzlement those skilled in the art's technical barrier.
Summary of the invention
In order to address the above problem, the utility model provides a kind of frequency conversion resonance vibration pressure-proof test unit, purpose is to solve in the various high-power transformer tests to have the problem that the withstand voltage test resonance device can not satisfy the requirement of test frequency now, and the utility model makes the tested transformer resonance test frequency of different capabilities, different rated voltages all can meet job requirement.
For reaching above-mentioned purpose, the utility model is achieved through the following technical solutions.
The frequency conversion resonance vibration pressure-proof test unit comprises variable-frequency power sources, intermediate transformer, wherein is parallel with reactor at the two ends of the high pressure winding of described intermediate transformer.
Described reactor is the adjustable compensation reactor.
Described adjustable compensation reactor is the 1-2 group.
When described adjustable compensation reactor is 2 groups, for being connected in series.
Described adjustable compensation reactor is provided with three taps, three taps are connected with coil by lead respectively, coil is arranged in the insulating cylinder shell, is filled with insulating oil in the insulating cylinder shell, and the head end and the end of three taps and reactor winding are installed on the insulating cylinder outer shell outer wall.
Described three taps, first tap is located at 1/5 position of reactor winding length, and second tap is located at 2/5 position of reactor winding length, and 1/2 position of reactor winding length is established in the 3rd tap.
Described insulating cylinder shell is installed on the insulator foot.
The utlity model has following advantage and effect owing to adopt technique scheme to make:
When the utility model is responded to withstand voltage and shelf depreciation to large-scale power transformer, no matter tested transformer voltage grade, what kind of difference of amount of capacity, can both regulate size by the adjustable compensation reactor, make variable-frequency power sources resonance device test frequency guarantee frequency of operation at 100～250Hz.Thereby making various large-scale power transformer respond to withstand voltage and work shelf depreciation can carry out smoothly.Reduced the experimental facilities input cost.
Description of drawings
Fig. 1 is existing resonance pressure-resistant test unit circuit theory diagrams.
Fig. 2 is the utility model frequency conversion resonance vibration pressure-proof test unit circuit theory diagrams.
Fig. 3 is the circuit theory diagrams of adjustable compensation reactor among Fig. 2.
Fig. 4 is the structural representation of adjustable compensation reactor among Fig. 2.
Among the figure, 1, variable-frequency power sources, 2, intermediate transformer, 3, the adjustable compensation reactor, 4, coil, 5, the insulating cylinder shell, 6, the reactor winding head end, 7, the reactor winding end, 8, first tap, 9, second tap, the 10, the 3rd tap, 11, insulator foot.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further details, but protection domain of the present utility model is not limit by embodiment.
As shown in Figure 2, the utility model frequency conversion resonance vibration pressure-proof test unit comprises variable-frequency power sources 1, intermediate transformer 2, is parallel with reactor at the two ends of intermediate transformer 2 high pressure windings, and this reactor can adopt adjustable compensation reactor 3, best results.
As shown in Figure 3 and Figure 4, above-mentioned adjustable compensation reactor 3 is provided with three taps, three taps are connected with coil 4 by lead respectively, coil 4 is arranged in the insulating cylinder shell 5, be filled with insulating oil in the insulating cylinder shell 5, three taps and the head end 6 of reactor winding and the end 7 of reactor winding are installed on insulating cylinder shell 5 outer walls.First tap 8 is located at 1/5 position of reactor winding 4 length in three taps, and second tap 9 is located at 2/5 position of reactor winding 4 length, and 1/2 position of reactor winding 4 length is established in the 3rd tap 10.Insulating cylinder shell 5 is installed on the insulator foot 11.
When the adjustable compensation reactor is used fully, compensating inductance amount minimum; When with the 3rd tap 10 the compensating inductance coil hour, compensating inductance amount maximum.
Change loop parameter or middle voltage source frequency, the loop promptly is tunable to resonance, an amplitude will be arranged simultaneously much larger than source current, and waveform approaches sinusoidal wave electric current and is added on the test product.As shown in Figure 2, the adjustable compensation reactor can be with 1～2 when step down side was 10kV, step down side is contacted with 2 table adjustable compensation reactors during for 66kV, neutral earthing, the tested transformer inlet of the inductive current of adjustable compensation reactor and test product capacitance current is cancelled out each other during work, the tested transformer of low capacity such as 60000kVA-120000kVA can compensate with the reactor with tap not, and the tested transformer of high capacity such as 180000kVA-240000kVA can adopt the adjustable compensation reactor of tap to compensate.
In the face of different test products, the method for inverse is adopted in the combination of adjustable compensation reactor.Determine by trial voltage whether connection in series-parallel makes up the adjustable compensation reactor earlier, again by definite test product ranges of capacity such as adjustable compensation reactor inductance, system works frequency 100～250Hz.
The test product trial voltage must ensure and be less than or equal to the reactor rated voltage, if the separate unit reactor can not satisfy voltage request, can adopt two reactors to connect and satisfy trial voltage.(fmin fmax), satisfies 100 Hz≤fmin≤fmax≤250Hz to determine to allow the test frequency scope by test product.According to reactor inductance L(separate unit or two series connection), test product allow the test frequency scope (fmin, fmax), determine test product electric capacity allowed band value (Cmin, Cmax).If the excessive or too small tap mode that changes compensating inductance that then adopts of test product electric capacity compensates the change of inductance size.
The parameter of the utility model adjustable compensation reactor 3 is as follows: rated voltage, 70kV; Rated current, 6A; Inductance value, 6H (± 10%); Rated capacity, 420kVAR; Dielectric level, 84kV/1min; Insulator foot is 40kV/5min over the ground; Operating frequency range, 20～300Hz; Allow temperature rise, under rated capacity, coil temperature rise≤65K, oily temperature rise≤55K; Office discharges water under flat, the rated voltage≤10pC; Allow working time: output-current rating allows operation 180min continuously down; Physical dimension, weight, weight: 350 ㎏, physical dimension: Φ 650 * 700(mm).
Claims (7)
1. frequency conversion resonance vibration pressure-proof test unit, it comprises variable-frequency power sources, intermediate transformer, it is characterized in that being parallel with reactor at the two ends of the high pressure winding of described intermediate transformer.
2. frequency conversion resonance vibration pressure-proof test unit according to claim 1 is characterized in that described reactor is the adjustable compensation reactor.
3. frequency conversion resonance vibration pressure-proof test unit according to claim 2 is characterized in that described adjustable compensation reactor is the 1-2 group.
4. frequency conversion resonance vibration pressure-proof test unit according to claim 3 is when is characterized in that described adjustable compensation reactor is 2 groups, for being connected in series.
5. according to claim 2,3 or 4 described frequency conversion resonance vibration pressure-proof test units, it is characterized in that described adjustable compensation reactor is provided with three taps, three taps are connected with coil by lead respectively, coil is arranged in the insulating cylinder shell, be filled with insulating oil in the insulating cylinder shell, the head end and the end of three taps and reactor winding are installed on the insulating cylinder outer shell outer wall.
6. frequency conversion resonance vibration pressure-proof test unit according to claim 5, it is characterized in that described three taps, first tap is located at 1/5 position of reactor winding length, second tap is located at 2/5 position of reactor winding length, and 1/2 position of reactor winding length is established in the 3rd tap.
7. frequency conversion resonance vibration pressure-proof test unit according to claim 5 is characterized in that described insulating cylinder shell is installed on the insulator foot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201500919U CN202057764U (en) | 2011-05-12 | 2011-05-12 | Variable frequency resonance voltage withstand test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201500919U CN202057764U (en) | 2011-05-12 | 2011-05-12 | Variable frequency resonance voltage withstand test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202057764U true CN202057764U (en) | 2011-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201500919U Expired - Lifetime CN202057764U (en) | 2011-05-12 | 2011-05-12 | Variable frequency resonance voltage withstand test device |
Country Status (1)
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|---|---|
| CN (1) | CN202057764U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288880A (en) * | 2011-05-12 | 2011-12-21 | 辽宁省电力有限公司沈阳供电公司 | Frequency-changing resonant withstand voltage testing device |
| CN102944776A (en) * | 2012-10-30 | 2013-02-27 | 苏州华电电气股份有限公司 | Moving test system for characteristics of transformer based on single-phase high-voltage variable-frequency power source parallel operation |
| CN106556787A (en) * | 2016-11-21 | 2017-04-05 | 云南电网有限责任公司电力科学研究院 | Power supply capacity compensation method in experiment is put in a kind of single-phase office of transformator |
| CN106771892A (en) * | 2016-11-21 | 2017-05-31 | 云南电网有限责任公司电力科学研究院 | Power supply capacity compensation method in a kind of Three-Phase Transformer partial discharge experiment |
| CN107478874A (en) * | 2017-09-15 | 2017-12-15 | 广西电友科技发展有限公司 | Instrument is sent in exchange examination |
-
2011
- 2011-05-12 CN CN2011201500919U patent/CN202057764U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288880A (en) * | 2011-05-12 | 2011-12-21 | 辽宁省电力有限公司沈阳供电公司 | Frequency-changing resonant withstand voltage testing device |
| CN102944776A (en) * | 2012-10-30 | 2013-02-27 | 苏州华电电气股份有限公司 | Moving test system for characteristics of transformer based on single-phase high-voltage variable-frequency power source parallel operation |
| CN106556787A (en) * | 2016-11-21 | 2017-04-05 | 云南电网有限责任公司电力科学研究院 | Power supply capacity compensation method in experiment is put in a kind of single-phase office of transformator |
| CN106771892A (en) * | 2016-11-21 | 2017-05-31 | 云南电网有限责任公司电力科学研究院 | Power supply capacity compensation method in a kind of Three-Phase Transformer partial discharge experiment |
| CN107478874A (en) * | 2017-09-15 | 2017-12-15 | 广西电友科技发展有限公司 | Instrument is sent in exchange examination |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121224 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121224 Address after: 110811 eight Heping Street, 94 Heping Street, Liaoning, Shenyang Patentee after: Liaoning Shenyang Electric Power Supply Co., Ltd. Patentee after: State Grid Corporation of China Address before: 110811 eight Heping Street, 94 Heping Street, Liaoning, Shenyang Patentee before: Liaoning Shenyang Electric Power Supply Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111130 |