CN109557425A - A kind of GIS partial discharge detection method based on SHF frequency range - Google Patents
A kind of GIS partial discharge detection method based on SHF frequency range Download PDFInfo
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- CN109557425A CN109557425A CN201710869474.3A CN201710869474A CN109557425A CN 109557425 A CN109557425 A CN 109557425A CN 201710869474 A CN201710869474 A CN 201710869474A CN 109557425 A CN109557425 A CN 109557425A
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- partial discharge
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- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 13
- 230000003750 conditioning effect Effects 0.000 claims abstract description 10
- 238000001228 spectrum Methods 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims abstract description 3
- 239000012212 insulator Substances 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
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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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention belongs to high voltage electric equipment Partial Discharge Detecting Technology fields, specifically belong to a kind of GIS partial discharge detection method based on SHF frequency range.Comprising: which SHF sensor, receives electromagnetic wave signal when shelf depreciation occurring inside GIS device, and convert thereof into electric signal and export to signal conditioning unit.Signal conditioning unit, for consider remove the received electromagnetic interference signal of SHF sensor, and GIS partial discharge signal is amplified and detection processing.Data acquisition process unit generates the analog-to-digital conversion of the electromagnetic wave signal of shelf depreciation, the real-time display of local discharge signal, the display of discharge spectrum and storage etc. for realizing GIS device inside.SHF detection frequency range is wider, can detecte the Partial discharge signal radiated from small gaps.SHF sensitivity is higher, and effective detection of GIS weak discharge may be implemented, convenient and efficient.
Description
Technical field
The invention belongs to high voltage electric equipment Partial Discharge Detecting Technology fields, specifically belong to a kind of based on SHF frequency
The GIS partial discharge detection method of section.
Background technique
In the prior art, Partial Discharge Detecting Technology is that the discovery potential insulation defect of high voltage electric equipment is most sensitive, most
An effective technology.GIS have occupied area is small, is influenced small, high reliability by external environmental condition, in China city
It is largely used in utility grid.In particular with the acceleration of China's economic development and urbanization process, the demand of GIS device is sharply
Increase.In recent years, GIS partial discharge detection technique in power grid using increasingly extensive, taken on a certain scale.GIS innings
Portion's discharge examination mode mainly has pulse current method, superfrequency method, supercritical ultrasonics technology etc..And superfrequency method (English abbreviation UHF) is
Widely used detection means, however since GIS device does not install built-in antenna in manufacture and production process, with
The intensification of GIS device all-metal degree of closure so that the electromagnetic wave that shelf depreciation generates inside GIS is increasingly difficult to by narrow
Small gap is to external communication, so that superfrequency detection mode can not effectively detect GIS partial discharge signal.In this background
Under, the present invention proposes that a kind of hyperfrequency (English abbreviation SHF, bandwidth 500MHz-4000MHz) detection GIS device that is based on locally is put
The method of electricity.
Summary of the invention
In order to effectively assess the insulation status of GIS device, that realizes shelf depreciation inside GIS device has the object of the invention
Effect detection, the invention proposes a kind of GIS partial discharge detection methods based on SHF frequency range.
The technical scheme is that a kind of GIS partial discharge detection method based on SHF frequency range, it is characterised in that packet
Include: SHF sensor receives electromagnetic wave signal when shelf depreciation occurring inside GIS device, and it is defeated to convert thereof into electric signal
Out to signal conditioning unit.The working band of SHF sensor is between 500MHz-4000MHz.In the detection process, SHF is passed
Sensor is placed near GIS disc insulator.
Signal conditioning unit, for SHF sensor received signal is filtered, is amplified and detection processing.Signal tune
The cutoff frequency for managing unit is 500MHz-4000MHz, and the gain in this frequency range is 40dB.
Data acquisition process unit, the modulus for generating the electromagnetic wave signal of shelf depreciation for realizing GIS device inside turn
It changes, the real-time display of local discharge signal, the display of discharge spectrum and storage etc..
The invention proposes a kind of detection methods of GIS equipment partial discharge based on SHF frequency range.The detection frequency band of SHF
Between 500MHz-4000MHz, have the advantages that ultra high bandwidth, high sensitivity, and this contactless measurement method pair
All safer for secondary device and testing staff, system structure is simple.Its working principle is that: occur inside GIS device
When shelf depreciation, pulse current is generated, rising edge is very precipitous, and the time is only several nanoseconds, the electromagnetic wave that it is ejected
GHz is up to counted, via equipment cavity coaxial configuration to blazing about, is radiated at the small gaps such as disc insulator to space.
The electromagnetic wave signal given off is disposed in the reception of the SHF sensor at disc insulator.
The beneficial effects of the present invention are: 1) SHF detection frequency range is wider, the office radiated from small gaps can detecte
Discharge signal.2) SHF sensitivity is higher, and effective detection of GIS weak discharge may be implemented, convenient and efficient.3) for secondary device
With it is all safer for testing staff, system structure is simple.
The present invention is described in further details below with reference to the accompanying drawings.
Detailed description of the invention
Fig. 1 is implementation schematic block diagram of the invention.
Specific embodiment
Referring to Fig. 1, SHF sensor 1, signal conditioning unit 2, data acquisition process unit 3.
Referring to Fig. 1, shown in be a kind of GIS partial discharge detection method based on SHF frequency range implementation schematic diagram, packet
It includes: SHF sensor 1, signal conditioning unit 2, data acquisition process unit 3, in which:
SHF sensor 1 receives electromagnetic wave signal when shelf depreciation occurring inside GIS device, and it is defeated to convert thereof into electric signal
Out to signal conditioning unit.
Signal conditioning unit 2 removes the received electromagnetic interference signal of SHF sensor for considering, and to GIS partial discharge signal
It amplifies and is handled with detection.
Data acquisition process unit 3, the modulus for generating the electromagnetic wave signal of shelf depreciation for realizing GIS device inside turn
It changes, the real-time display of local discharge signal, the display of discharge spectrum and storage etc..
Claims (1)
1. a kind of GIS partial discharge detection method based on SHF frequency range, characterized by comprising:
SHF sensor (1) receives electromagnetic wave signal when shelf depreciation occurring inside GIS device, and converts thereof into electric signal
SHF sensor is placed near GIS disc insulator by output to signal conditioning unit；
Signal conditioning unit (2), for SHF sensor (1) received signal is filtered, amplify and detection processing；
Data acquisition process unit (3), the modulus for generating the electromagnetic wave signal of shelf depreciation for realizing GIS device inside turn
It changes, the real-time display of local discharge signal, the display of discharge spectrum and storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710869474.3A CN109557425A (en) | 2017-09-23 | 2017-09-23 | A kind of GIS partial discharge detection method based on SHF frequency range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710869474.3A CN109557425A (en) | 2017-09-23 | 2017-09-23 | A kind of GIS partial discharge detection method based on SHF frequency range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109557425A true CN109557425A (en) | 2019-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710869474.3A Pending CN109557425A (en) | 2017-09-23 | 2017-09-23 | A kind of GIS partial discharge detection method based on SHF frequency range |
Country Status (1)
| Country | Link |
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| CN (1) | CN109557425A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113419151A (en) * | 2021-07-15 | 2021-09-21 | 贵州电网有限责任公司 | Portable fault insulator online detection device and detection method |
-
2017
- 2017-09-23 CN CN201710869474.3A patent/CN109557425A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113419151A (en) * | 2021-07-15 | 2021-09-21 | 贵州电网有限责任公司 | Portable fault insulator online detection device and detection method |
| CN113419151B (en) * | 2021-07-15 | 2022-07-01 | 贵州电网有限责任公司 | Portable fault insulator online detection device and detection method |
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Application publication date: 20190402 |