CN102592806A - Amorphous alloy dry-type transformer coil insulating structure and method of removing local discharge signal noise - Google Patents
Amorphous alloy dry-type transformer coil insulating structure and method of removing local discharge signal noise Download PDFInfo
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- CN102592806A CN102592806A CN2011104335443A CN201110433544A CN102592806A CN 102592806 A CN102592806 A CN 102592806A CN 2011104335443 A CN2011104335443 A CN 2011104335443A CN 201110433544 A CN201110433544 A CN 201110433544A CN 102592806 A CN102592806 A CN 102592806A
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- Prior art keywords
- coil
- discharge signal
- local discharge
- insulation
- noise
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- 229910000808 amorphous metal alloys Inorganic materials 0.000 title abstract description 9
- 238000004804 winding Methods 0.000 claims abstract description 15
- 238000000034 methods Methods 0.000 claims abstract description 14
- 238000009413 insulation Methods 0.000 claims description 30
- 238000004458 analytical methods Methods 0.000 claims description 10
- 239000005300 metallic glasses Substances 0.000 claims description 10
- 239000010410 layers Substances 0.000 claims description 7
- 230000000737 periodic Effects 0.000 claims description 7
- 230000001131 transforming Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 239000000835 fibers Substances 0.000 claims description 6
- 238000007598 dipping method Methods 0.000 claims description 4
- 229920000784 Nomex Polymers 0.000 claims description 3
- 239000004744 fabrics Substances 0.000 claims description 3
- 239000011229 interlayers Substances 0.000 claims description 3
- 239000000463 materials Substances 0.000 claims description 3
- 239000004763 nomex Substances 0.000 claims description 3
- 229920005587 polyester-imide Polymers 0.000 claims description 3
- 238000006243 chemical reactions Methods 0.000 claims description 2
- 239000003365 glass fibers Substances 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- 239000002966 varnish Substances 0.000 abstract description 6
- 238000009826 distribution Methods 0.000 abstract description 2
- 238000001035 drying Methods 0.000 abstract 1
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 238000005470 impregnation Methods 0.000 abstract 1
- 238000007405 data analysis Methods 0.000 description 3
- 230000003014 reinforcing Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering processes Methods 0.000 description 2
- 238000002592 echocardiography Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000003379 elimination reactions Methods 0.000 description 1
- 239000000686 essences Substances 0.000 description 1
- 230000002401 inhibitory effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reactions Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Abstract
Description
Technical field
The present invention relates to power transformer manufacturing and built-in electrical insulation monitoring technology, concretely, is a kind of coil insulation structure of amorphous alloy dry-type transformer and the method for removing noise in the local discharge signal.
Background technology
At present, in amorphous alloy transformer, coil is wound in round shape; Cause the volume of transformer big, cost is high, and the number of turn of the coil winding of each layer is all identical, both has been unfavorable for heat radiation; Be unfavorable for that again insulating varnish soaks into, simultaneously, end winding adopts traditional angle end insulation more; Profile looks not attractive in appearance, can not satisfy enough mechanical strengths.When monitoring transformer inside partial discharge,, when monitoring, tend to run into various interference, disturb and white noise like periodic narrow because the operational outfit site environment is complicated.The sensitivity and the reliability of the influence monitoring of these serious interference.Therefore, the elimination of interference and inhibition are the key issues of partial discharge monitoring.
Summary of the invention
The present invention be directed to the deficiency of prior art, provide a kind of novel H level partly to seal three pillar amorphous alloy dry-type transformer coil insulation systems, make volume of transformer little; Good looking appearance; Can satisfy enough mechanical strengths, the coil inside thermal diffusivity is good, and it is strong that insulating varnish soaks into ability; The core interior field intensity evenly distributes, and anti-short circuit capability is strong.Based on the method for Fourier analysis and small echo variation, remove noise in the monitoring local discharge signal, to calculate simply, eliminating is disturbed, and makes analysis result more accurate.
The present invention is achieved through subordinate's technical scheme: adopt a kind of H level partly to seal the coil insulation structure of three pillar amorphous alloy dry-type transformers, it comprises end winding, between coil segment; Coil windings; Coil is outside, it is characterized in that: described end winding adopts the rectangular end circle, separates with the dovetail cushion block between coil segment; Coil windings adopts the coiling of rectangle cylinder mode, and coil is outside to be handled through wrapping-vacuum pressure oven dry-dipping lacquer-curing process.In addition; During the monitoring local discharge signal,, give SONOAN through being installed in two sensor acquisition discharge signals on the insulation winding; Periodic narrow through analyzer is isolated in the noise is disturbed and white noise; As long as adding equal and opposite in direction, opposite polarity compensating signal are offset, the signal that deliver in the main frame this moment is exactly a local discharge signal, and the technical staff can be to judge the Insulation Problems place of transformer exactly.
Described end winding adopts the end coil structures-rectangular end circle of similar SGB10 product, and the end places the stepped end insulation.
Described dovetail cushion block evenly distributes along circumference eight equal portions, and its height and the coil width of cloth are to consistent size.
Described coil windings adopts four-part form to distribute, and every section each interlayer coil turn is arranged according to pyramid, and layer asks that it is the two film Du Ponts of H level paper lenticular wires that NOMEX paper, electromagnetic wire are used in insulation.
Described coil encapsulating adopts four sections integral body to seal, and seals with a polyester-imide plate earlier, wraps up two-layer with H grade high-strength, exotic material half lap again.
Removal local discharge signal noise method of the present invention comprises data acquisition, data processing and data analysis, and described method comprises step:
Data acquisition step through light communication, optic fiber converter converts the detected partial discharge acoustic signals of built-in sensors into the signal of telecommunication and host computer carries out exchanges data, is stored in the process in the host computer ACCESS database;
Data in the top database are done Fourier analysis with data processing step operational analysis appearance and wavelet transformation obtains periodic narrow interference and white noise, through compensator compensates equal and opposite in direction, opposite polarity signal, just obtains the local discharge signal of wanting again;
The physical attribute of data analysis step local discharge signal is presented on the main frame, and the technical staff can find the in-problem position of insulation through analysis software.
The invention has the beneficial effects as follows: end winding has adopted square coil, makes good looking appearance, can satisfy enough mechanical strengths again; Separate with the dovetail cushion block between coil segment, both guaranteed intersegmental distance, guaranteed intersegmental enough spaces of leaving again; Help heat radiation and impregnating varnish to soak into fully, coil windings is with the circular configuration coiling, and this just makes field strength distribution even; The coil external coil through oven dry-dipping lacquer-curing process, has possessed anti-short circuit capability preferably again after wrapping.Adopt Fourier analysis and wavelet transformation to carry out denoising, process is calculated simply, method is ripe, and denoising effect is better, makes analysis result more accurate sooner.
Description of drawings
Fig. 1 longitudinal sectional view of the present invention;
Fig. 2 vertical view of the present invention;
Fig. 3 partial discharge denoising flow chart
Wherein: the insulation of (1) square coil (2) insulation bucket (3) winding (4) dovetail cushion block (5) external reinforcing.
Embodiment
Introduce as follows the present invention is concrete below in conjunction with accompanying drawing:
A kind of transformer coil insulation system as shown in Figure 1 comprises rectangular end circle, insulating cylinder, coil windings, external reinforcing insulation, and wherein the rectangular end circle adopts the end coil structures of similar SGB10 product, and good looking appearance can satisfy enough mechanical strengths again.
Coil windings adopts four cylindrical section formula structure coilings, every section each interlayer coil turn down payment word turriform rule coiling, from inside to outside coil turn by close to rare;
Separate insulation with NOMEX paper between every layer of the coil, electromagnetic wire adopts the two film Du Ponts of H level paper lenticular wire;
External reinforcing insulation is to seal four sections integral body, i.e. polyester-imide plate of bag earlier externally is two-layer with H grade high-strength, the wrapping of exotic material half lap again, again through vacuum pressure oven dry-dipping lacquer-curing process processing, has solved the problem of anti-short circuit capability difference basically.
The dovetail cushion block of plug-in mounting between each section coil as shown in Figure 2 being spaced from each other between coil segment, helps heat radiation and impregnating varnish to soak into fully;
The described dovetail cushion block height and the coil width of cloth are evenly placed 8 dovetail cushion blocks to consistent size between every section.
Also do and further describe removing local discharge signal noise method, described method may further comprise the steps:
Data acquisition step through light communication, optic fiber converter converts the detected partial discharge acoustic signals of built-in sensors into the signal of telecommunication and host computer carries out exchanges data, is stored in the process in the host computer ACCESS database;
Top data are done Fourier analysis with data processing step operational analysis appearance and wavelet transformation obtains periodic narrow interference and white noise, and signal compensator compensation equal and opposite in direction, opposite polarity signal just obtain the local discharge signal of wanting again;
The physical attribute of data analysis step local discharge signal is presented on the main frame, and the technical staff can find the problem of insulation existence through analysis software.
Described built-in sensors is connected with transformer insulated winding through signal input channel.
Described built-in sensors is connected with optic fiber converter through the RS232 serial communication protocol, and optic fiber converter is connected with host computer through the optical fiber communication bus.
Described Fourier analysis is handled, and is that the interference signals waveform that is mixed with that collects is carried out FFT, finds a series of centre frequency ω of narrow band interference i, choose suitable fourier coefficient, disturb thereby obtain periodic narrow.
Described wavelet transform process is that the interference signal that collects is carried out wavelet package transforms, selects a minimum basic function as wavelet transformation of entropy, thereby obtains best classification performance, provides best signal transformation.
Described analytic process, be the data conversion storage after handling in the INSQL real-time data base, adopt INSQL database analysis software that data are handled, analyzed, the problem place of final decision partial discharge, and then take the modification measure.
The technical staff in present technique field should be realized that; Above embodiment is used for explaining patent of the present invention; And be not to serve as qualification of the present invention; So long as in the essence of an invention spirit, to the variation of the above embodiment, distortion all drops in the scope of claims of the present invention.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104335443A CN102592806A (en) | 2011-12-22 | 2011-12-22 | Amorphous alloy dry-type transformer coil insulating structure and method of removing local discharge signal noise |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104335443A CN102592806A (en) | 2011-12-22 | 2011-12-22 | Amorphous alloy dry-type transformer coil insulating structure and method of removing local discharge signal noise |
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| CN102592806A true CN102592806A (en) | 2012-07-18 |
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| CN2011104335443A CN102592806A (en) | 2011-12-22 | 2011-12-22 | Amorphous alloy dry-type transformer coil insulating structure and method of removing local discharge signal noise |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102945741A (en) * | 2012-11-19 | 2013-02-27 | 江苏宏安变压器有限公司 | Three-phase three-pole H-class open type SGB10 amorphous alloy transformer |
| CN107329067A (en) * | 2017-06-16 | 2017-11-07 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of circuit for eliminating 12 pulsation interference |
Citations (5)
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| JPS60165707A (en) * | 1984-02-08 | 1985-08-28 | Toshiba Corp | Transformer for ac-dc conversion |
| CN1787134A (en) * | 2005-12-13 | 2006-06-14 | 中电电气集团有限公司 | Tech. for impregnating varnish of half packed 10KV grade high voltage coil |
| CN201117408Y (en) * | 2007-07-27 | 2008-09-17 | 中电电气集团有限公司 | High low-voltage winding rectangular coil |
| CN101847505A (en) * | 2010-05-28 | 2010-09-29 | 常州联力变压器有限公司 | Dry type transformer and manufacturing method thereof |
| CN101949744A (en) * | 2010-09-06 | 2011-01-19 | 国网电力科学研究院武汉南瑞有限责任公司 | Fiber grating-based transformer internal temperature detection system |
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2011
- 2011-12-22 CN CN2011104335443A patent/CN102592806A/en not_active Application Discontinuation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60165707A (en) * | 1984-02-08 | 1985-08-28 | Toshiba Corp | Transformer for ac-dc conversion |
| CN1787134A (en) * | 2005-12-13 | 2006-06-14 | 中电电气集团有限公司 | Tech. for impregnating varnish of half packed 10KV grade high voltage coil |
| CN201117408Y (en) * | 2007-07-27 | 2008-09-17 | 中电电气集团有限公司 | High low-voltage winding rectangular coil |
| CN101847505A (en) * | 2010-05-28 | 2010-09-29 | 常州联力变压器有限公司 | Dry type transformer and manufacturing method thereof |
| CN101949744A (en) * | 2010-09-06 | 2011-01-19 | 国网电力科学研究院武汉南瑞有限责任公司 | Fiber grating-based transformer internal temperature detection system |
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| 杨洋: "基于小波分析的变压器局部放电数字化抗干扰方法研究", 《基于小波分析的变压器局部放电数字化抗干扰方法研究》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102945741A (en) * | 2012-11-19 | 2013-02-27 | 江苏宏安变压器有限公司 | Three-phase three-pole H-class open type SGB10 amorphous alloy transformer |
| CN102945741B (en) * | 2012-11-19 | 2016-08-10 | 江苏宏安变压器有限公司 | A kind of three-phase three-column H level open type SGB10 type amorphous alloy transformer |
| CN107329067A (en) * | 2017-06-16 | 2017-11-07 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of circuit for eliminating 12 pulsation interference |
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Application publication date: 20120718 |