CN2697662Y - Local discharge detection sensor for ultraviolet frequency band - Google Patents
Local discharge detection sensor for ultraviolet frequency band Download PDFInfo
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- CN2697662Y CN2697662Y CN 200320109957 CN200320109957U CN2697662Y CN 2697662 Y CN2697662 Y CN 2697662Y CN 200320109957 CN200320109957 CN 200320109957 CN 200320109957 U CN200320109957 U CN 200320109957U CN 2697662 Y CN2697662 Y CN 2697662Y
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- local discharge
- detection sensor
- gis
- partial discharge
- detecting sensor
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Abstract
The utility model discloses a local discharge detection sensor for broad band for detecting the high-voltage equipment of the gas insulated substation(GIS). The local discharge detection sensor for broad band is positioned on the outer margin of the disk insulator, and realizes the outlay electrode method measure of the GIS local discharge. The body of the detection sensor is a broad band checking aerial, and the band range is 10MHz-3000MHz. One end of the aerial is provided with matched impedance of 50 ohms, and the other side of the aerial is provided with an SMA high frequency coaxial connector used for feeding. The aerial is arranged in a packaging case made up of epoxy plates, and a gap with the length of 400mm and width of 10mm is arranged on one surface of the packaging case. When used, the surface with gap is positioned towards the gap of the disk insulator and the metal shell. Using the local discharge detection sensor for broad band to do local discharge on-line inspection of the working GIS high-voltage equipment or of the release testing GIS high-voltage equipment, the discharging characteristic peak can not be missed, the reflection of the electromagnetic wave cannot generate, the self-excitation cannot happen, and the local discharge caused by various deficiency types can be reflected more generally and veritably. The local discharge detection sensor for broad band has the advantages of low cost, and convenient installation, and the advantages that the structure of the monitoring equipment is not changed, and the normal operation of the monitoring equipment is not influenced.
Description
One, affiliated technical field
The utility model belongs to technical field of electricity, relates to gas insulated transformer substation (GIS) high-tension apparatus local discharge on-line monitoring device, particularly a kind of ultrabroad band partial discharge detecting sensor based.
Two, background technology
The various defectives of gas insulated transformer substation (GIS) cause various forms of shelf depreciations, as the discharge of corona, impurity, the discharge of epoxy supporting insulator internal air gap etc.Partial discharge pulse's signal is to transmit with the form of TEM ripple in GIS, this electromagnetic wave signal can by be installed in GIS device interior or outside partial discharge monitoring sensor to, and then carry out the on-line monitoring of GIS insulation system shelf depreciation state.
At present common GIS local discharge superhigh frequency detects two kinds of methods: interior electrode method and external electrode method.
The electrode method is that coated electrode and cover plate are formed on the groove of the drying agent of GIS opening cover plate in a kind of, and electrode and cover plate are insulated by teflon sleeve, carries out impedance matching with the resistance of one 50 Ω, and the sensitivity with this method can reach 1pC theoretically; The electromagnetic wave signal that the method that electrode measurement is realized in another adopts built-in UHF antenna sensor to be coupled and to be produced by shelf depreciation, the sensor measurement frequency band of design is 300MHz～3000MHz, and purpose is to avoid the interference of low-frequency range as far as possible and seek the discharge characteristic of various defectives at high band.
The external electrode method is external and corresponding to the disk insulator outer rim partial discharge detecting sensor based is installed at GIS.Have the insulation slit because the disk insulator among the GIS is connected with the metal shell of GIS, when electromagnetic wave when metal cylinder is propagated, can this slit to locate to leak into GIS external, this electromagnetic wave signal that just can be coupled of the partial discharge detecting sensor based outside placing.
The gas discharge waveform that burr causes is narrower, frequency is higher, can reach more than the 1000MHz, the inherent vice of disk insulator and surface filth discharge frequency are then so not high, experiment showed, that the local discharge characteristic peak that the most defect type in disk insulator surface is caused concentrates in the following frequency range of 300MHz mostly.Therefore carry out partial discharge monitoring and accurate real-time its surface insulation situation of reflection of disk insulator, to improving the operational reliability of GIS equipment, further avoid because the GIS fault causes heavy economic losses and substation safety operation to have great significance.
As Chinese invention patent, application number: 94113338, a kind of method for sensing and sensor of detected gas insulation in combined electric appliance shelf depreciation have been proposed, disk insulator outer rim at GIS is provided with the electromagnetic wave that the inner shelf depreciation of electromagnetic sensor reception GIS is produced, realize the external sensing measurement of GIS internal discharge, said electromagnetic sensor is a metallic shield box, and recording quantity is installed in box and can be received the electromagnetic antenna of superfrequency.This patent should be mentioned that a kind of method of external electrode method measurement GIS shelf depreciation, there is certain defective in it, make reflecting of the electromagnetic wave signal that leaks out easily as the metallic shield box structure that adopts, one side is opened wide the protection that is unfavorable for antenna fully, and the employing ultra-high frequency antenna has been omitted the discharge characteristic peak of GIS typical defect etc.
Three, summary of the invention
At defective or the deficiency that above-mentioned prior art exists, the pick-up unit of exploitation high-frequency wideband comes to reflect comparatively all sidedly that the intrinsic propesties of shelf depreciation is particularly necessary.The purpose of this utility model provides a kind of more novel GIS high-tension apparatus shelf depreciation broadband detecting sensor, adopts the external electrode method to realize the ultrabroad band Partial Discharge Detection.
The technical solution that realizes above-mentioned purpose is that detecting sensor is placed in the disk insulator outer rim, has realized that the external electrode method of GIS shelf depreciation is measured.The detecting sensor main body is that a broadband detects antenna, frequency band range 10MHz～3000MHz, and antenna one end has the matched impedance in 50 Europe, and a side is useful on the SMA high-frequency coaxial connector of feed.This antenna is placed in the enclosure of being made by epoxy plate, and the one side of enclosure has the long 400mm that is, wide is the slit of 10mm, and this face is towards the place, slit of disk insulator and metal shell during use.
Ultrabroad band partial discharge detecting sensor based of the present utility model, it has advantage such as measure bandwidth, frequency height, contain much information.
Four, description of drawings
Fig. 1 (a) is integral body assembling 1/4th cut-open views of partial discharge detecting sensor based of the present utility model, and Fig. 1 (b) is the partial enlarged drawing among Fig. 1 (a).
Fig. 2 is the vertical view of sensor of the present utility model.
Fig. 3 is the backplan of sensor of the present utility model.
Fig. 4 (a) is the microstrip antenna component drawings of sensor of the present utility model, and Fig. 4 (b) is a microstrip line.
Fig. 5 is the tangent a kind of installation method synoptic diagram of sensor box body bottom surface and disk insulator outer ring surface.
Fig. 6 be sensor box body bottom surface parallel with the high-pressure conductor bearing of trend and with the perpendicular installation method synoptic diagram of disk insulator face.
Five, embodiment
Embodiment below in conjunction with accompanying drawing and inventor finish is described in further detail the utility model.
All channel antenna 2 is core components of this sensor among Fig. 1, and it is connected and fixed by the upper cover plate 1 of two high-frequency coaxial connectors 5 with enclosure, and epoxy packages main casing 3 has been formed enclosure jointly with upper cover plate 1.One 50 Europe matched impedances 4 are installed on a coaxial connector, and another coaxial connector connects the high-frequency transmission cable and enters the detection loop.
In the bottom side of epoxy packages main casing the one wide 10mm of being is arranged among Fig. 2, length is the slit 6 of 400mm.
Side at polytetrafluoroethylene fibre plate 8 among Fig. 4 has a wide 5mm of being, length is the microstrip line 9 of 400mm, is used for receiving the electromagnetic wave signal of local discharge generation.
Fig. 5 and Fig. 6 are two kinds of installation methods of rig-site utilization.Fig. 5 is that sensor box body bottom surface and disk insulator outer ring surface are tangent.Fig. 6 is that sensor box body bottom surface is parallel with the high-pressure conductor bearing of trend and perpendicular with the disk insulator face.Both all will make the bottom surface that has the slit towards disk insulator.
Ultrabroad band partial discharge detecting sensor based of the present utility model, carry out the online detection of GIS high-tension apparatus broadband shelf depreciation in operating or the delivery test, do not omit the discharge characteristic peak, the reflection that does not generate electromagnetic waves, do not produce self-excitation, can be more comprehensively and reflect the shelf depreciation that the various defect types of GIS cause truly.This device cost of manufacture is low, easy for installation, does not change the structure of monitoring equipment, does not influence the normal operation of monitoring equipment.
This Partial Discharge Detection is with sensor successful Application on the GIS of Yuquan transformer station of Gansu Province Tianshui Power Supply Bureau apparatus local discharge on-line monitoring system.
Claims (5)
1. ultrabroad band partial discharge detecting sensor based, it is characterized in that, it comprises, one enclosure that is constituted by main casing [3] and upper cover plate [1], being packaged with frequency band range in the enclosure is the broadband detection antenna [2] of 10MHz～3000MHz, and antenna ends is useful on the SMA high-frequency coaxial connector [5] of feed; An end wherein is connected with 50 ohm matched impedance [4], and the bottom side of main casing [3] has slit [6].
2. ultrabroad band partial discharge detecting sensor based as claimed in claim 1, it is characterized in that, described broadband detects antenna [2] and is connected and fixed by the upper cover plate [1] of two high-frequency coaxial connectors [5] with enclosure, one 50 Europe matched impedances [4] are installed on a coaxial connector, and another coaxial connector connects the high-frequency transmission cable and enters the detection loop.
3. ultrabroad band partial discharge detecting sensor based as claimed in claim 1 is characterized in that, described broadband detects antenna [2] and makes for the polytetrafluoroethylene fibre plate, and a side has one widely to be 5mm, grows to be the microstrip line of 400mm.
4. ultrabroad band partial discharge detecting sensor based as claimed in claim 1 is characterized in that, the wide of the slit of described encapsulation main casing [6] is 10mm, and long is 400mm.
5. ultrabroad band partial discharge detecting sensor based as claimed in claim 1 is characterized in that, described slit [6] in use this slit towards disk insulator and metal shell place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320109957 CN2697662Y (en) | 2003-12-18 | 2003-12-18 | Local discharge detection sensor for ultraviolet frequency band |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320109957 CN2697662Y (en) | 2003-12-18 | 2003-12-18 | Local discharge detection sensor for ultraviolet frequency band |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2697662Y true CN2697662Y (en) | 2005-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320109957 Expired - Lifetime CN2697662Y (en) | 2003-12-18 | 2003-12-18 | Local discharge detection sensor for ultraviolet frequency band |
Country Status (1)
| Country | Link |
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| CN (1) | CN2697662Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527221B (en) * | 2009-03-27 | 2011-06-22 | 西安交通大学 | External GIS local discharge ultrahigh frequency monitoring sensor |
| CN102175950A (en) * | 2011-02-22 | 2011-09-07 | 云南电力试验研究院(集团)有限公司 | Mobile field partial discharge source visual detection method for GIS (gas insulated switchgear) |
| CN102565642A (en) * | 2011-12-22 | 2012-07-11 | 西安交通大学 | Ultrahigh frequency sensor for on-line monitoring of local discharging in GIS (Global Information System) |
| CN102803974A (en) * | 2009-06-19 | 2012-11-28 | 爱瑞万T&D股份有限公司 | A device for monitoring a gas-insulated high-voltage substation by measuring partial discharges and the gas-insulated high-voltage substation using the device |
| WO2014107990A1 (en) * | 2013-01-11 | 2014-07-17 | 国家电网公司 | Testing device and testing method for electromagnetic wave propagation characteristic in gas insulated switchgear |
| US8786450B2 (en) | 2009-05-14 | 2014-07-22 | Siemens Aktiengesellschaft | Method for identifying dirt and/or dew on components of a voltage intermediate circuit converter |
| CN104459495A (en) * | 2014-12-17 | 2015-03-25 | 广西电网公司电力科学研究院 | Installation method and structure for external sensor used for detecting sleeve partial discharge |
| CN105606976A (en) * | 2016-03-09 | 2016-05-25 | 国家电网公司 | Anti-interference method for GIS partial discharge ultrahigh-frequency on-line monitoring |
| CN105548841B (en) * | 2016-01-05 | 2018-07-17 | 国家电网公司 | A kind of built-in uhf sensor for GIS partial discharge detection spreads structure |
| CN108680797A (en) * | 2018-04-25 | 2018-10-19 | 歌尔股份有限公司 | A kind of antenna test method and antenna measurement equipment |
-
2003
- 2003-12-18 CN CN 200320109957 patent/CN2697662Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527221B (en) * | 2009-03-27 | 2011-06-22 | 西安交通大学 | External GIS local discharge ultrahigh frequency monitoring sensor |
| US8786450B2 (en) | 2009-05-14 | 2014-07-22 | Siemens Aktiengesellschaft | Method for identifying dirt and/or dew on components of a voltage intermediate circuit converter |
| CN102422515B (en) * | 2009-05-14 | 2015-10-14 | 西门子公司 | Dirt on identification voltage intermediate circuit current transformer assembly and/or the method for condensation |
| CN102803974B (en) * | 2009-06-19 | 2014-12-24 | 阿尔斯通技术有限公司 | A device for monitoring a gas-insulated high-voltage substation by measuring partial discharges and the gas-insulated high-voltage substation using the device |
| CN102803974A (en) * | 2009-06-19 | 2012-11-28 | 爱瑞万T&D股份有限公司 | A device for monitoring a gas-insulated high-voltage substation by measuring partial discharges and the gas-insulated high-voltage substation using the device |
| CN102175950A (en) * | 2011-02-22 | 2011-09-07 | 云南电力试验研究院(集团)有限公司 | Mobile field partial discharge source visual detection method for GIS (gas insulated switchgear) |
| CN102565642A (en) * | 2011-12-22 | 2012-07-11 | 西安交通大学 | Ultrahigh frequency sensor for on-line monitoring of local discharging in GIS (Global Information System) |
| WO2014107990A1 (en) * | 2013-01-11 | 2014-07-17 | 国家电网公司 | Testing device and testing method for electromagnetic wave propagation characteristic in gas insulated switchgear |
| CN104459495A (en) * | 2014-12-17 | 2015-03-25 | 广西电网公司电力科学研究院 | Installation method and structure for external sensor used for detecting sleeve partial discharge |
| CN104459495B (en) * | 2014-12-17 | 2018-01-16 | 广西电网公司电力科学研究院 | A kind of installation method and structure of the external sensor for detecting sleeve pipe shelf depreciation |
| CN105548841B (en) * | 2016-01-05 | 2018-07-17 | 国家电网公司 | A kind of built-in uhf sensor for GIS partial discharge detection spreads structure |
| CN105606976A (en) * | 2016-03-09 | 2016-05-25 | 国家电网公司 | Anti-interference method for GIS partial discharge ultrahigh-frequency on-line monitoring |
| CN105606976B (en) * | 2016-03-09 | 2018-09-18 | 国家电网公司 | A kind of anti-interference method for GIS partial discharge superfrequency on-line monitoring |
| CN108680797A (en) * | 2018-04-25 | 2018-10-19 | 歌尔股份有限公司 | A kind of antenna test method and antenna measurement equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20131218 Granted publication date: 20050504 |