CN112986769A - Cable built-in type partial discharge detection sensor - Google Patents
Cable built-in type partial discharge detection sensor Download PDFInfo
- Publication number
- CN112986769A CN112986769A CN202110352111.9A CN202110352111A CN112986769A CN 112986769 A CN112986769 A CN 112986769A CN 202110352111 A CN202110352111 A CN 202110352111A CN 112986769 A CN112986769 A CN 112986769A
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- CN
- China
- Prior art keywords
- cable
- electrode
- partial discharge
- rubber pad
- detection 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
- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 230000001012 protector Effects 0.000 claims abstract description 4
- 239000003292 glue Substances 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 abstract description 7
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- 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
- G01R31/1263—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 solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—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 solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
A kind of cable built-in partial discharge detection sensor, the pressure equalizing grounding ring is embedded with the whorl, pass the whorl connection with the end of the fixed hood, the fixed hood is fixed with one side of high-temperature rubber pad, another side of high-temperature rubber pad is fixed with the electrode, the core of the high-temperature signal line of connection of the electrode, SMA joint of the high-temperature signal line connects the voltage protector; when the electrode and the main insulated cable are wound, a capacitor is formed between the electrode and the main insulated cable, the sensor is tightly attached to the main insulated part of the cable by using the high-temperature rubber pad, the fixed cover and the grounding ring, the flexibility of the high-temperature rubber pad can squeeze air gaps between the electrode and the main insulated part, the stability of the capacitor formed between the sensor and the main insulated part of the cable is ensured, and the grounding ring is connected with the cable armor layer for grounding, so that the cable is safe and reliable, and has the characteristics of high sensitivity and wide frequency band.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a cable built-in type partial discharge detection sensor
Background
The cable built-in partial discharge detection sensor can effectively couple partial discharge signals of the cable connector and couple the partial discharge signals in a mode of forming capacitance with the cable body, and has the characteristics of wide frequency band, high sensitivity and strong interference resistance.
The existing cable partial discharge sensor technology is mainly in the form of a rogowski coil, a partial discharge signal is coupled in the form of a cable grounding wire coupling, a rogowski coil on a cable body and a label capacitor, the rogowski coil coupling is easily interfered by large-scale power equipment of a grounding wire by coupling a high-frequency partial discharge signal of the grounding wire, and partial discharge and the signal are difficult to distinguish; although the frequency band of the label capacitive sensor is wide, the label capacitive sensor and a cable body form a capacitive coupling partial discharge signal, and the influence of the main insulation, the aluminum sheath and the semi-conducting layer of the cable greatly influences the performance and reduces the sensitivity.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a cable built-in type partial discharge detection sensor, which solves the problems that the traditional partial discharge sensor has poor anti-interference capability, is easy to interfere in ground wire monitoring and cannot determine the source of partial discharge, and has the characteristics of high reliability, high sensitivity and wide frequency band.
A built-in partial discharge detection sensor of a cable comprises a voltage-sharing grounding ring 1, wherein threads are embedded in the voltage-sharing grounding ring 1 and are connected with the end part of a fixed cover 2 through threads, the fixed cover 2 is fixed to one surface of a high-temperature rubber pad 3, an electrode 4 is fixed to the other surface of the high-temperature rubber pad 3, the electrode 4 is connected with a wire core of a high-temperature signal wire 5, and an SMA joint of the high-temperature signal wire 5 is connected with a voltage protector 6.
The fixed cover 2 is fixed with one side of the high-temperature rubber pad 3 through glue, and the other side of the high-temperature rubber pad 3 is bonded with the electrode 4 through glue.
The fixed cover 2 is a semi-cylindrical structure and is formed into a cylinder by two parts.
The electrode 4 is a cuboid, is wound on the cable main insulating layer through the fixing cover 2, and has reserved gaps at two ends and does not form a cylinder.
The thickness of the electrode 4 is 0.5mm, the width is 50mm, the length is 100mm, and gaps of 2mm are reserved at two ends.
The fixed cover 2 is made of aluminum metal.
The electrode 4 is copper.
The invention has the advantages that:
(1) and a high-temperature rubber pad 3 is arranged between the fixed cover 2 and the electrode 4, the high-temperature rubber pad 3 has certain flexibility when the temperature changes, and the electrode 4 and the main insulating part can be tightly attached to each other in the installation process, so that bubbles are prevented from being generated.
(2) The invention has high sensitivity, is directly arranged at the position 50cm away from the cable joint, and when the cable joint generates partial discharge, because the sensor is arranged near the joint, the partial discharge signal avoids the attenuation in the transmission process, and the detection sensitivity can reach 2 pC.
(3) The frequency band is wide, the electrode 4 is a cuboid, the thickness is 0.5mm, the width is 50mm, the length is 100mm, the electrode is wound on the cable main insulating layer through the fixed cover 2, gaps of 2mm are reserved at two ends, a cylinder is not formed, the capacitor 100pf formed by winding is formed, and the frequency band of the sensor is-1 MHz-100 MHz (-10 dB).
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, the built-in partial discharge detection sensor of the cable comprises a voltage-sharing grounding ring 1, wherein threads are embedded in the voltage-sharing grounding ring 1 and are connected with the end part of a fixed cover 2 through threads, the fixed cover 2 is fixed on one surface of a high-temperature rubber pad 3, an electrode 4 is fixed on the other surface of the high-temperature rubber pad 3, the electrode 4 is connected with a wire core of a high-temperature signal wire 5, and an SMA joint of the high-temperature signal wire 5 is connected with a voltage protector 6.
The fixed cover 2 is fixed with one side of the high-temperature rubber pad 3 through glue, and the other side of the high-temperature rubber pad 3 is bonded with the electrode 4 through glue.
The fixed cover 2 is made of aluminum metal with a semi-cylindrical structure, and two fixed covers form a cylinder.
Electrode 4 is cuboid red copper, and thickness 0.5mm, wide 50mm, long 100mm twines on cable main insulation layer through fixed cover 2, and the 2mm gap is reserved at both ends, does not form the cylinder.
The working principle of the invention is as follows:
when the electrode 4 and the main insulated cable are wound, a capacitor is formed between the electrode 4 and the main insulated cable, the high-temperature rubber pad 3, the fixed cover 2 and the grounding ring 1 are utilized to enable the sensor to be tightly attached to the main insulated part of the cable, the flexibility of the high-temperature rubber pad 3 can squeeze the air gap between the electrode 4 and the main insulated part, the stability of the capacitor formed between the sensor and the main insulated part of the cable is ensured, and the grounding ring 1 is connected with the cable armor layer for grounding, so that the safety and the reliability are realized. The cable is also of a capacitive characteristic, when partial discharge occurs inside the cable, the defects and the capacitor directly form a loop, and the discharge pulse can be measured through the SMA connector of the high-temperature signal wire 5.
Claims (7)
1. The utility model provides a built-in partial discharge of cable detects sensor, its characterized in that includes voltage-sharing ground ring (1), and the embedded screw thread that has of voltage-sharing ground ring (1) passes through threaded connection with fixed cover (2) tip, and fixed cover (2) are fixed with high temperature rubber pad (3) one side, and high temperature rubber pad (3) another side is fixed with electrode (4), and the sinle silk of high temperature signal line (5) is connected in electrode (4), and the SMA joint connection voltage protector (6) of high temperature signal line (5).
2. The cable built-in partial discharge detection sensor according to claim 1, wherein the fixing cover (2) is fixed to one surface of the high-temperature rubber pad (3) by glue, and the other surface of the high-temperature rubber pad (3) is bonded to the electrode (4) by glue.
3. The cable built-in partial discharge detection sensor according to claim 1, wherein the fixing cover (2) is a semi-cylindrical structure, and two of the fixing cover are combined into a cylinder.
4. The cable built-in partial discharge detection sensor according to claim 1, wherein the electrode (4) is a cuboid, is wound on the cable main insulation layer through the fixing cover (2), and has gaps reserved at two ends and does not form a cylinder.
5. The cable built-in partial discharge detection sensor according to claim 4, wherein the thickness of the electrode (4) is 0.5mm, the width is 50mm, the length is 100mm, and a gap of 2mm is reserved at both ends.
6. A cable built-in partial discharge detection sensor according to claim 1 or 3, wherein the fixing cap (2) is aluminum metal.
7. The cable built-in partial discharge detection sensor according to claim 1 or 4, wherein the electrode (4) is copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110352111.9A CN112986769A (en) | 2021-03-31 | 2021-03-31 | Cable built-in type partial discharge detection sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110352111.9A CN112986769A (en) | 2021-03-31 | 2021-03-31 | Cable built-in type partial discharge detection sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112986769A true CN112986769A (en) | 2021-06-18 |
Family
ID=76338791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110352111.9A Pending CN112986769A (en) | 2021-03-31 | 2021-03-31 | Cable built-in type partial discharge detection sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112986769A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117269699A (en) * | 2023-11-20 | 2023-12-22 | 西安博源电气有限公司 | Distributed partial discharge positioning detection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004017342A1 (en) * | 2002-08-16 | 2004-02-26 | Fujitsu Limited | Capacitor circuit and method for mounting capacitor circuit |
| CN101666849A (en) * | 2009-09-28 | 2010-03-10 | 西安交通大学 | Online monitoring device of partial discharge of high-voltage cable joint and online monitoring method thereof |
| CN202404199U (en) * | 2011-11-04 | 2012-08-29 | 山西省电力公司朔州供电分公司 | Metal closed complete switch equipment partial discharge detection device |
| CN107039182A (en) * | 2016-01-25 | 2017-08-11 | Tdk株式会社 | Electronic unit |
| CN107402343A (en) * | 2017-08-10 | 2017-11-28 | 重庆泰山电缆有限公司 | A kind of capacitive high voltage cable connector shelf depreciation built-in sensors structure |
| CN111103515A (en) * | 2019-12-10 | 2020-05-05 | 国网上海市电力公司 | Built-in cable partial discharge detection device and method |
-
2021
- 2021-03-31 CN CN202110352111.9A patent/CN112986769A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004017342A1 (en) * | 2002-08-16 | 2004-02-26 | Fujitsu Limited | Capacitor circuit and method for mounting capacitor circuit |
| CN101666849A (en) * | 2009-09-28 | 2010-03-10 | 西安交通大学 | Online monitoring device of partial discharge of high-voltage cable joint and online monitoring method thereof |
| CN202404199U (en) * | 2011-11-04 | 2012-08-29 | 山西省电力公司朔州供电分公司 | Metal closed complete switch equipment partial discharge detection device |
| CN107039182A (en) * | 2016-01-25 | 2017-08-11 | Tdk株式会社 | Electronic unit |
| CN107402343A (en) * | 2017-08-10 | 2017-11-28 | 重庆泰山电缆有限公司 | A kind of capacitive high voltage cable connector shelf depreciation built-in sensors structure |
| CN111103515A (en) * | 2019-12-10 | 2020-05-05 | 国网上海市电力公司 | Built-in cable partial discharge detection device and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117269699A (en) * | 2023-11-20 | 2023-12-22 | 西安博源电气有限公司 | Distributed partial discharge positioning detection device |
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