CN107807312B - Ultrahigh frequency partial discharge detection method - Google Patents
Ultrahigh frequency partial discharge detection method Download PDFInfo
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- CN107807312B CN107807312B CN201710884105.1A CN201710884105A CN107807312B CN 107807312 B CN107807312 B CN 107807312B CN 201710884105 A CN201710884105 A CN 201710884105A CN 107807312 B CN107807312 B CN 107807312B
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- pouring hole
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1254—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of gas-insulated power appliances or vacuum gaps
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Abstract
The invention relates to a method for detecting ultrahigh frequency partial discharge. The existing method has a plurality of defects. The method of the invention is that a flat antenna is arranged between an insulator body of a basin-type insulator with a pouring hole shielding layer and the shielding layer, and the flat antenna is insulated from the shielding layer through an insulating layer; the orthographic projection of the pouring hole of the shielding layer is located in the range of the panel antenna, and the top surface of the pouring hole is sealed through the metal cover plate. The signal output connector is arranged on the metal cover plate and connected with the output end of the signal conditioning circuit through a radio frequency cable, and the input end of the signal conditioning circuit is connected with the panel antenna through a feeder line. The grounding protective cover of the signal output connector is screwed out in a rotating mode, an external interface is connected, the grounding protective cover is transmitted to a background ultrahigh frequency detection instrument through an external cable, and then ultrahigh frequency signals can be collected and analyzed. The method of the invention embeds the antenna into the insulating basin, and has the advantages of excellent shielding performance, good anti-interference performance, high detection efficiency and convenient maintenance.
Description
Technical Field
The invention belongs to the technical field of high-voltage detection, and particularly relates to an ultrahigh-frequency partial discharge detection method.
Background
The ultrahigh frequency partial discharge detection method is a key technical means for detecting the insulation state of a GIS (Gas Insulated Switchgear), and mainly collects ultrahigh frequency partial discharge signals through an external ultrahigh frequency sensor or an internal ultrahigh frequency sensor.
The GIS basin-type insulator is used for connecting an insulating support piece between two gas chambers of a GIS. There are currently three main types: the insulator comprises a basin-type insulator without a shielding layer, a totally-enclosed basin-type insulator with a shielding layer and a basin-type insulator with a pouring hole shielding layer. The external ultrahigh frequency sensor is mainly used for basin-type insulators without shielding layers and basin-type insulators with shielding layers of pouring holes; the built-in ultrahigh frequency sensor is mainly used for a totally-enclosed basin-type insulator with a shielding layer.
Built-in superfrequency sensor acquisition signal needs GIS equipment manufacturer to reserve fixed mounting mouth on the jar body, and this structure has a great deal of shortcoming: firstly, the GIS insulation safety distance is difficult to guarantee, and insulation defects such as suspension potential and the like are easily caused; secondly, the monitoring position cannot be changed at the later stage, and the detection efficiency is low; thirdly, the air tightness and the integrity of the tank body are directly influenced, and the workload of opening holes is increased.
An external ultrahigh frequency sensor acquires signals, although an installation opening is not required to be reserved, when the pouring hole is used for detection, the sensor is influenced by the size of the pouring hole, needs to be arranged outside the pouring hole of the basin-type insulator with the pouring hole shielding layer, and has the defects of large internal signal attenuation, easy external interference and the like; for the basin-type insulator without the shielding layer, although the detection signal is good, the defects that the GIS has large outward electromagnetic radiation, the detection signal is easily interfered by the outside and the like exist.
Disclosure of Invention
The invention aims to provide a method for detecting ultrahigh frequency partial discharge, aiming at the defects of the prior art.
The method of the invention is that a flat antenna is arranged between an insulator body of a basin-type insulator with a pouring hole shielding layer and the shielding layer, the flat antenna and the shielding layer are insulated by an insulating layer, and the flat antenna is an annular ultrahigh frequency sensor; the orthographic projection of the pouring hole of the shielding layer is positioned in the range of the panel antenna; the side wall of the pouring hole is a metal shielding layer, the bottom of the pouring hole is an insulating layer, and the top surface of the pouring hole is sealed by a metal cover plate.
The signal output connector is arranged on the metal cover plate and connected with the output end of the signal conditioning circuit through a radio frequency cable, and the input end of the signal conditioning circuit is connected with the panel antenna through a feeder line.
The grounding protective cover of the signal output connector is screwed out in a rotating mode, an external interface is connected, the grounding protective cover is transmitted to a background ultrahigh frequency detection instrument through an external cable, and then ultrahigh frequency signals can be collected and analyzed.
The plate antenna and the shielding layer are cylindrical and are coated on the circumference of the edge of the basin-type insulator.
The panel antenna is an arc-surface panel antenna, the shielding layer is an arc-surface insulating board, the arc-surface panel antenna and the arc surface of the shielding layer which is the arc-surface insulating board are attached to each other, and the projection area of the arc-surface panel antenna is larger than that of the pouring hole.
According to the method, the annular ultrahigh frequency sensor is arranged in the insulating basin, and the detection effect of the built-in sensor can be achieved without changing the electrical safety distance and the insulating property of the GIS; the design has excellent shielding performance and good anti-interference performance, and is suitable for the field environment; the problem that holes need to be formed in the GIS sensor can be avoided, and the insulation defects that suspension discharge and the like are easily caused in the GIS sensor are avoided; the built-in annular ultrahigh frequency antenna is arranged, the frequency detection bandwidth is wide, the signal receiving surface is large, and the partial discharge signal in the GIS can be efficiently captured; the built-in signal processing module has the advantages of small effective signal attenuation, high detection efficiency, convenient module maintenance, safety, reliability and long-term use.
Drawings
FIG. 1 is a schematic front view of an embodiment of the present invention;
FIG. 2 is a schematic side view of the structure of FIG. 1;
FIG. 3 is a schematic front view of another embodiment of the present invention;
fig. 4 is a schematic side view of fig. 3.
Detailed Description
A ultrahigh frequency partial discharge detection method is characterized in that a flat antenna is arranged between an insulator body of a basin-type insulator with a pouring hole shielding layer and the shielding layer, the flat antenna and the shielding layer are insulated through an insulating layer, and the flat antenna is an annular ultrahigh frequency sensor; the orthographic projection of the pouring hole of the shielding layer is positioned in the range of the panel antenna; the side wall of the pouring hole is a metal shielding layer, the bottom of the pouring hole is an insulating layer, and the top surface of the pouring hole is sealed by a metal cover plate.
The signal output connector is arranged on the metal cover plate and connected with the output end of the signal conditioning circuit through a radio frequency cable, and the input end of the signal conditioning circuit is connected with the panel antenna through a feeder line.
The grounding protective cover of the signal output connector is screwed out in a rotating mode, an external interface is connected, the grounding protective cover is transmitted to a background ultrahigh frequency detection instrument through an external cable, and then ultrahigh frequency signals can be collected and analyzed.
Two embodiments are given below.
Example 1.
As shown in fig. 1 and 2, an antenna layer 2 made of a metal material is coated on an outer surface of a wall of a totally enclosed insulating basin body 1 made of an insulating material, an insulating layer 3 is coated on the antenna layer 2, a metal shielding layer 4 is coated on the insulating layer 3, and the antenna layer 2 and the metal shielding layer 4 are insulated by the insulating layer 3. The antenna layer 2 is a ring-shaped ultrahigh frequency sensor.
The annular metal shielding layer 4 is provided with a pouring hole 5, the pouring hole 5 penetrates through the metal shielding layer 4 along the radial direction, the side wall of the pouring hole 5 is step-shaped, the top of the pouring hole 5 is provided with a metal cover plate 6, and the metal cover plate 6 is arranged on the step 5-1 and is fixedly connected with the metal shielding layer 4 through screws. The side wall of the pouring hole 5 is a metal shielding layer, the bottom of the pouring hole is an insulating layer 3, the top of the pouring hole is a metal cover plate 6, a closed installation cavity is enclosed, and the signal conditioning circuit board is arranged in the installation cavity.
The metal cover plate 6 is provided with a signal output connector mounting hole 6-1. In operation, signal output connects and passes the fixed setting on metal covering 6 of mounting hole, and signal output connects and meets with antenna layer 2 through the feeder, can gather the inside superfrequency office of GIS and put the signal, transmits to backstage superfrequency detecting instrument through external cable, analyzes superfrequency signal.
Example 2.
As shown in fig. 3 and 4, the annular metal shielding layer 4 is coated on the outer surface of the wall of the totally-enclosed insulating basin body 1 made of the insulating material, a pouring hole 5 is formed in the metal shielding layer 4, and the pouring hole 5 penetrates through the metal shielding layer 4 along the radial direction. An antenna groove is formed in the inner wall of the metal shielding layer 4 corresponding to the position of the pouring hole 5, and the inward opening of the pouring hole 5 is in the range of the bottom of the antenna groove. The cambered surface plate antenna 2 and the cambered surface insulating piece 3 that match with the antenna slot bottom shape are embedded into the antenna slot, wherein the cambered surface plate antenna 2 is pasted with the edge wall of the insulating basin body 1, the cambered surface insulating piece 3 is pasted with the cambered surface of the cambered surface plate antenna 2, and the cambered surface plate antenna 2 is insulated from the metal shielding layer 4 through the cambered surface insulating piece 3. The cambered surface flat antenna 2 is an ultrahigh frequency sensor.
The side wall of the pouring hole 5 is step-shaped, a metal cover plate 6 is arranged at the top of the pouring hole 5, and the metal cover plate 6 is arranged on the step 5-1 and fixedly connected with the metal shielding layer 4 through screws. The side wall of the pouring hole 5 is a metal shielding layer 4, the bottom of the pouring hole is an arc surface insulation sheet 3, the top of the pouring hole is a metal cover plate 6, a closed installation cavity is enclosed, and the signal conditioning circuit board is arranged in the installation cavity.
The metal cover plate 6 is provided with a signal output connector mounting hole 6-1. In operation, the signal output connects and passes the fixed setting on metal covering 6 of mounting hole, and the signal output connects and meets with cambered surface plate antenna 2 through the feeder, can gather the inside superfrequency office of GIS and put the signal, transmits to backstage superfrequency detecting instrument through external cable, analysis superfrequency signal.
Claims (1)
1. A ultrahigh frequency partial discharge detection method is characterized in that a flat antenna is arranged between an insulator body of a basin-type insulator with a pouring hole shielding layer and the shielding layer, the flat antenna and the shielding layer are insulated through an insulating layer, and the flat antenna is an ultrahigh frequency sensor; the orthographic projection of the pouring hole of the shielding layer is positioned in the range of the panel antenna; the side wall of the pouring hole is a metal shielding layer, the bottom of the pouring hole is an insulating layer, and the top surface of the pouring hole is sealed by a metal cover plate;
arranging a signal output connector on the metal cover plate, wherein the signal output connector is connected with the output end of the signal conditioning circuit through a radio frequency cable, and the input end of the signal conditioning circuit is connected with the flat antenna through a feeder line;
the grounding protective cover of the signal output connector is screwed out in a rotating mode, an external interface is connected, and the grounding protective cover is transmitted to a background ultrahigh frequency detection instrument through an external cable, so that ultrahigh frequency signals can be collected and analyzed;
the specific implementation method comprises the following steps:
coating a circular metal shielding layer (4) on the outer surface of the wall of a totally-enclosed insulating basin body (1) made of an insulating material, wherein a pouring hole (5) is formed in the metal shielding layer (4), and the pouring hole (5) penetrates through the metal shielding layer (4) along the radial direction; an antenna slot is formed in the inner wall of the metal shielding layer (4) corresponding to the position of the pouring hole (5), and the inward opening of the pouring hole (5) is in the range of the bottom of the antenna slot; the cambered surface flat antenna (2) and the cambered surface insulating sheet (3) which are matched with the bottom shape of the antenna slot are embedded into the antenna slot, wherein the cambered surface flat antenna (2) is attached to the wall of the insulating basin body (1), the cambered surface insulating sheet (3) is attached to the cambered surface of the cambered surface flat antenna (2), the cambered surface flat antenna (2) is insulated from the metal shielding layer (4) through the cambered surface insulating sheet (3), the cambered surface flat antenna (2) is attached to the cambered surface of the cambered surface insulating sheet (3), and the projection area of the cambered surface flat antenna is larger than the projection area of the pouring hole (5); the cambered surface flat antenna (2) is an ultrahigh frequency sensor;
the side wall of the pouring hole (5) is step-shaped, a metal cover plate (6) is arranged at the top of the pouring hole (5), and the metal cover plate (6) is arranged on the step (5-1) and fixedly connected with the metal shielding layer (4) through screws; the side wall of the pouring hole (5) is a metal shielding layer (4), the bottom of the pouring hole is an arc surface insulation sheet (3), the top of the pouring hole is a metal cover plate (6), a closed installation cavity is enclosed, and the signal conditioning circuit board is arranged in the installation cavity;
a signal output connector mounting hole (6-1) is formed in the metal cover plate (6); the signal output connector penetrates through a signal output connector mounting hole (6-1) and is fixedly arranged on the metal cover plate (6), the signal output connector is connected with the cambered surface flat antenna (2) through a feeder line, an ultrahigh frequency partial discharge signal in the GIS is collected and transmitted to a background ultrahigh frequency detection instrument through an external cable, and the ultrahigh frequency signal is analyzed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710884105.1A CN107807312B (en) | 2017-09-26 | 2017-09-26 | Ultrahigh frequency partial discharge detection method |
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| CN201710884105.1A CN107807312B (en) | 2017-09-26 | 2017-09-26 | Ultrahigh frequency partial discharge detection method |
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| CN107807312A CN107807312A (en) | 2018-03-16 |
| CN107807312B true CN107807312B (en) | 2020-01-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109358273A (en) * | 2018-11-16 | 2019-02-19 | 国网宁夏电力有限公司电力科学研究院 | Superfrequency detection system based on crusing robot |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1673762A (en) * | 2005-04-26 | 2005-09-28 | 重庆大学 | Gasinsulation combined electric device local discharge analog experimental apparatus and experimental method |
| CN102096027A (en) * | 2010-11-15 | 2011-06-15 | 华北电力大学 | Pre-embedded sensor for local discharge detection of power cable accessory |
| CN202994964U (en) * | 2012-12-29 | 2013-06-12 | 内蒙古自治区电力科学研究院 | UHF partial discharge sensor capable of closely cooperating with GIS basin-type insulator |
| CN203825148U (en) * | 2014-04-24 | 2014-09-10 | 上海思源高压开关有限公司 | Grading ring partial discharge sensor of disc-type insulator |
| CN205404742U (en) * | 2016-03-09 | 2016-07-27 | 国家电网公司 | A simple and easy anti jamming unit for GIS partial discharge superfrequency is electrified to be detected |
| CN205427126U (en) * | 2016-04-05 | 2016-08-03 | 成都恒锐智科数字技术有限公司 | GIS partial discharge high altitude sampling device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04320977A (en) * | 1991-03-31 | 1992-11-11 | Fujikura Ltd | Partial discharge position orientation method |
| US5376879A (en) * | 1992-11-03 | 1994-12-27 | Qrp, Incorporated | Method and apparatus for evaluating electrostatic discharge conditions |
-
2017
- 2017-09-26 CN CN201710884105.1A patent/CN107807312B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1673762A (en) * | 2005-04-26 | 2005-09-28 | 重庆大学 | Gasinsulation combined electric device local discharge analog experimental apparatus and experimental method |
| CN102096027A (en) * | 2010-11-15 | 2011-06-15 | 华北电力大学 | Pre-embedded sensor for local discharge detection of power cable accessory |
| CN202994964U (en) * | 2012-12-29 | 2013-06-12 | 内蒙古自治区电力科学研究院 | UHF partial discharge sensor capable of closely cooperating with GIS basin-type insulator |
| CN203825148U (en) * | 2014-04-24 | 2014-09-10 | 上海思源高压开关有限公司 | Grading ring partial discharge sensor of disc-type insulator |
| CN205404742U (en) * | 2016-03-09 | 2016-07-27 | 国家电网公司 | A simple and easy anti jamming unit for GIS partial discharge superfrequency is electrified to be detected |
| CN205427126U (en) * | 2016-04-05 | 2016-08-03 | 成都恒锐智科数字技术有限公司 | GIS partial discharge high altitude sampling device |
Non-Patent Citations (2)
| Title |
|---|
| "Development of a loop-type partial discharge sensor embedded in insulation material of a 245 kV-class GIS";T.Hoshino等;《2012IEEE》;20131231;1-6 * |
| "Research of a loop-type sensor embedded in an insulator in 252kV GIS for partial discharge measurement";Xizi Zhang 等;《2017 8th International Conference on Mechanical and Intelligent Manufacturing Technologies (lCMIMT)》;20170504;164-173 * |
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