CN105629129A - Improved drying changing iron core insulation resistance technology and partial discharge on-line monitoring system - Google Patents
Improved drying changing iron core insulation resistance technology and partial discharge on-line monitoring system Download PDFInfo
- Publication number
- CN105629129A CN105629129A CN201410586354.9A CN201410586354A CN105629129A CN 105629129 A CN105629129 A CN 105629129A CN 201410586354 A CN201410586354 A CN 201410586354A CN 105629129 A CN105629129 A CN 105629129A
- Authority
- CN
- China
- Prior art keywords
- iron core
- partial discharge
- transformer
- sensor
- sonic sensor
- 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.)
- Pending
Links
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The present invention discloses the new technology of improving dry-type transformer iron core insulation resistance. The technology comprises a structure for improving an epoxy plate and a sheet of insulation materials disposed between an iron core and the ground. According to the invention, the partial discharge generated by iron core magnetic leakage or defective insulation is reduced, the vibration of the iron core is decreased and the noise of the transformer is reduced, and the reliable insulation operation of the transformer is ensured. The invention further discloses a new dry-type transformer on-line monitoring testing system. The system mainly comprises a waveguide tube, a sound wave sensor, a preamplifier, a filter and an oscilloscope. The sound wave sensor and the filter are able to eliminate the interferences caused by noise of the grounding end and the vibration of the iron core and cannot generate false alarm phenomenon; and the waveguide tube is able to transmit sound wave and eliminate the influence of a high-voltage coil on a sensor. The system is able to measure the distance between partial discharge source and the central position of the waveguide tube so as to position the position of the discharge source.
Description
Technical field
The invention discloses a kind of novel dry transformer partial discharge monitoring pilot system, belong to epoxy resin dry type transformer partial discharge monitoring technical field.
Background technology
Oil-filled transformer technology maturation, cost are low, but there is the shortcomings such as liquid leakage and contaminated environment due to it, are not easily applied in the occasion that safe operation requirement is higher, the environment of image height filth, high temperature and humidity. Dry type transformer structure is simple, safeguard and maintenance to facilitate many compared with oil-filled transformer. Simultaneously dry-type transformer all adopts anti-flammability insulant, has combustion fire-retardant, resistance to, the advantage such as nuisanceless and non-maintaining, and be widely used in skyscraper and commercial center, oil, chemical industry etc. has the department of requirements at the higher level to fire prevention and safety.
The biochemical reaction of gas componant when oil-filled transformer is frequently utilized that electric discharge or some materials of being dissolved in insulating oil is to monitor the partial discharge phenomenon of transformator, as utilizing HFCT sensor and TEV sensor etc. But dry-type transformer insulate frequently with epoxy resin, it is unable to as oil-filled transformer and is utilizing chemical analysis to monitor partial discharge phenomenon. The method that the monitoring of the shelf depreciation problem of dry-type transformer is generally adopted is application radio frequency sensor and Fibre Optical Sensor. But radio frequency sensor is highly susceptible to the interference of noise and corona discharge; Fibre Optical Sensor is difficult to identify the heat spot that the high-tension coil of high temperature causes due to shelf depreciation; It addition, both the above monitoring system considers price also costly from economic performance.
Summary of the invention
For the defect of traditional partial discharge of dry-type transformer on-line monitoring system mentioned above, the invention provides a kind of novel dry transformer partial discharge monitoring pilot system.
The novel dry transformer partial discharge monitoring pilot system that the present invention proposes: install waveguide (6) on the top of high-tension coil (2), then install sonic sensor on waveguide (6)And sonic sensor (4)(5), sonic sensorAnd sonic sensor (4)(5) preamplifier and wave filter it are respectively provided withAnd preamplifier and wave filter (7)(8). Described waveguide (6) replaces with safety glass; Described sonic sensorAnd sonic sensor (4)(5) model is VS30-V.
The present invention has the advantages that:
Utilize sonic sensor can not only measure the distance of Partial Discharge Sources and waveguide center and the particular location of Partial Discharge Sources can also be positioned. It is absent from causing owing to crossing susceptiveness the phenomenon of wrong report as electric measurement simultaneously. It addition, audible signal process for the later stage Computer signal process simple, economical. Also apply sonic wave guide pipe within the system, started a new sonic propagation approach, and eliminated the interference that sensor is caused by high-tension coil electric discharge. The method can be completely eliminated earth terminal noise and the interference of vibrations generation unshakable in one's determination. This pilot system is the measurement of following shelf depreciation and location provides a kind of simple solution safe and reliable, practicable, economic.
Accompanying drawing explanation
Fig. 1 is the principle schematic of measurement of partial discharge pilot system. Wherein,
Wherein,
1 low-voltage coil.
2 high-tension coils.
3 dry-type transformers.
4 sonic sensors��
5 sonic sensors��
6 waveguides.
7 preamplifiers and wave filter��
8 preamplifiers and wave filter��
9 oscillographs.
Fig. 2 is the principle schematic of shelf depreciation location test system.
Wherein,
1-discharge source.
2 is unshakable in one's determination.
3 coils.
4 sonic sensors��
5 sonic sensors��
6 waveguides.
Detailed description of the invention
The present invention will be further described below:
In conjunction with accompanying drawing 1, the experiment with measuring system of partial discharge of dry-type transformer is described further: high and low pressure coil (1) and (2) are respectively adopted triangle and connect, installing a waveguide (6) on the top of high-tension coil (2), two models installed above at waveguide (6) are the sonic sensor of VS30-VAnd sonic sensor (4)(5), respectively through preamplifier and wave filterAnd preamplifier and wave filter (7)(8) oscillograph (9) it is connected to above. Acoustic signals passes through waveguide (6) by sonic sensorAnd sonic sensor (4)(5) it is received and converted to the signal of telecommunication, then shows on oscillograph (9) after amplified filtering. By observing sonic sensorAnd sonic sensor (4)(5) receive the time difference of acoustic signals, calculate the distance (specific formula for calculation will illustrate in fig 2) of shelf depreciation generation coil and waveguide (6) center further according to sound wave spread speed in waveguide (6).
In conjunction with accompanying drawing 2, the location test system of partial discharge of dry-type transformer is described further: the distance assuming discharge source (1) and waveguide (6) center isX, sonic sensorAnd sonic sensor (4)(5) distance isL, then sonic sensor(4) with the distance of discharge source (1) be (L/2+X), sonic sensor(5) with the distance of discharge source (1) be (L/2-X), sound wave is respectively by sonic sensorAnd sonic sensor (4)(5) range difference propagated after receiving is 2X, from oscillograph, observe sonic sensorAnd sonic sensor (4)(5) time difference) receiving sound wave isT, so discharge source (1)) and waveguide (6) center between distanceX=(3413*T/2) m, wherein 3413m/s is sound wave spread speed in waveguide (6), and then determines the position of the coil that shelf depreciation occurs.
Claims (5)
1. a novel dry transformer partial discharge monitoring pilot system, it is characterised in that: adopt sonic sensor(4), sonic sensorAnd waveguide (6) (5).
2. a kind of novel dry transformer partial discharge monitoring pilot system according to claim 1, it is characterised in that: sonic sensorAnd sonic sensor (4)(5) model is VS30-V.
3. a kind of novel dry transformer partial discharge monitoring pilot system according to claim 2, it is characterised in that: by sonic sensorAnd sonic sensor (4)(5) it is installed on waveguide (6), respectively through preamplifier and wave filterAnd preamplifier and wave filter (7)(8) oscillograph (9) it is connected to above.
4. a kind of novel dry transformer partial discharge monitoring pilot system according to claim 3, it is characterized in that: waveguide (6) replaces with safety glass, waveguide (6) is arranged on the top of high-tension coil (2).
5. a kind of novel dry transformer partial discharge monitoring pilot system according to claim 4, it is characterised in that: high-tension coil (2) adopts triangle to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410586354.9A CN105629129A (en) | 2014-10-28 | 2014-10-28 | Improved drying changing iron core insulation resistance technology and partial discharge on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410586354.9A CN105629129A (en) | 2014-10-28 | 2014-10-28 | Improved drying changing iron core insulation resistance technology and partial discharge on-line monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105629129A true CN105629129A (en) | 2016-06-01 |
Family
ID=56044250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410586354.9A Pending CN105629129A (en) | 2014-10-28 | 2014-10-28 | Improved drying changing iron core insulation resistance technology and partial discharge on-line monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105629129A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111157855A (en) * | 2019-12-31 | 2020-05-15 | 山东信通电子股份有限公司 | Method for judging transmission line fault and server |
| CN111983390A (en) * | 2019-04-10 | 2020-11-24 | 国网江苏省电力有限公司南通供电分公司 | GIS fault accurate positioning system based on vibration signal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201137370A (en) * | 2010-04-16 | 2011-11-01 | Jiann-Fuh Chen | Method and device for inspecting positions of internal partial discharge and external corona of cast-resin dry-type transformer |
| CN202177683U (en) * | 2011-08-01 | 2012-03-28 | 保定天威集团有限公司 | Partial discharge test device for dry-type transformer |
| CN102543422A (en) * | 2012-01-05 | 2012-07-04 | 江苏宏安变压器有限公司 | Technology for improving insulation resistance of dry transformer iron core and online monitoring system for partial discharge |
| CN102809719A (en) * | 2012-08-07 | 2012-12-05 | 中国海洋石油总公司 | Dry-type transformer partial discharge on-line monitoring device and positioning method thereof |
| CN202695130U (en) * | 2012-01-05 | 2013-01-23 | 江苏宏安变压器有限公司 | Novel partial discharge online monitoring test system of dry-type transformer |
-
2014
- 2014-10-28 CN CN201410586354.9A patent/CN105629129A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201137370A (en) * | 2010-04-16 | 2011-11-01 | Jiann-Fuh Chen | Method and device for inspecting positions of internal partial discharge and external corona of cast-resin dry-type transformer |
| CN202177683U (en) * | 2011-08-01 | 2012-03-28 | 保定天威集团有限公司 | Partial discharge test device for dry-type transformer |
| CN102543422A (en) * | 2012-01-05 | 2012-07-04 | 江苏宏安变压器有限公司 | Technology for improving insulation resistance of dry transformer iron core and online monitoring system for partial discharge |
| CN202695130U (en) * | 2012-01-05 | 2013-01-23 | 江苏宏安变压器有限公司 | Novel partial discharge online monitoring test system of dry-type transformer |
| CN102809719A (en) * | 2012-08-07 | 2012-12-05 | 中国海洋石油总公司 | Dry-type transformer partial discharge on-line monitoring device and positioning method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983390A (en) * | 2019-04-10 | 2020-11-24 | 国网江苏省电力有限公司南通供电分公司 | GIS fault accurate positioning system based on vibration signal |
| CN111983390B (en) * | 2019-04-10 | 2021-09-14 | 国网江苏省电力有限公司南通供电分公司 | GIS fault accurate positioning system based on vibration signal |
| CN111157855A (en) * | 2019-12-31 | 2020-05-15 | 山东信通电子股份有限公司 | Method for judging transmission line fault and server |
| CN111157855B (en) * | 2019-12-31 | 2021-07-20 | 山东信通电子股份有限公司 | Method for judging transmission line fault and server |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102709037B (en) | A kind of transformator possessing built-in sensors | |
| CN103672415B (en) | Based on the gas pipe leakage detection of non-intervention type sensor and navigation system and method | |
| CN202074237U (en) | Pipeline leakage monitoring and negative pressure protecting device | |
| CN104597425B (en) | One kind being suitable for GIS electronic mutual inductor and charges evaluating platform | |
| CN108508085A (en) | A kind of torsion mode magneto strictive sensor, pipe detection system and method | |
| CN102798806A (en) | Partial discharge detecting method of transformers | |
| CN102543422A (en) | Technology for improving insulation resistance of dry transformer iron core and online monitoring system for partial discharge | |
| CA2821256C (en) | Broadband eddy current probe | |
| CN111505468B (en) | Optical fiber distributed partial discharge detection system | |
| CN105629129A (en) | Improved drying changing iron core insulation resistance technology and partial discharge on-line monitoring system | |
| CN202695130U (en) | Novel partial discharge online monitoring test system of dry-type transformer | |
| JP2009080057A (en) | Partial discharge source discrimination device of oil-immersed transformer | |
| KR101103677B1 (en) | Oil filled transformer functioned as detecting device a partial dischargein in using and method for detecting a partial dischargein | |
| CN103672416A (en) | Non-intrusive piezoelectric gas pipeline leakage infrasonic wave detection device | |
| Fu et al. | A simulation of gas pipeline leakage monitoring based on distributed acoustic sensing | |
| CN107576379A (en) | A kind of oil-filled transformer body noise-monitoring equipment and method | |
| TWI440871B (en) | Method and device for inspecting positions of internal partial discharge and external corona of cast-resin dry-type transformer | |
| JPS5857056B2 (en) | Corona detection method | |
| Kozako et al. | New Partial Discharge location method in power transformer based on acoustic wave propagation characteristics using numerical simulation | |
| Su et al. | Partial discharge detection using acoustic emission method for a waveguide functional high-voltage cast-resin dry-type transformer | |
| KR101171857B1 (en) | detecting internal cracks of transformer | |
| CN103644461B (en) | A kind of non-intervention type capacitor type gas pipe leakage infrasonic wave detection apparatus | |
| Najafi et al. | The influence of corona near to the bushing of a transformer on partial discharge measurement with an acoustic emission sensor | |
| CN202794114U (en) | Waveguide device used under high temperature and high pressure water environment | |
| CN202421431U (en) | Hot-line test window for partial discharge of transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160601 |