CN106569112A - GIS partial discharge location method - Google Patents
GIS partial discharge location method Download PDFInfo
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- CN106569112A CN106569112A CN201610985114.5A CN201610985114A CN106569112A CN 106569112 A CN106569112 A CN 106569112A CN 201610985114 A CN201610985114 A CN 201610985114A CN 106569112 A CN106569112 A CN 106569112A
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- partial discharge
- gis
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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
- G01R31/1263—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
- G01R31/1281—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 liquids or gases
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention relates to a GIS partial discharge location method which is characterized by comprising the following steps: (1) performing ultra-high-frequency partial discharge detection at different positions of a GIS; (2) detecting all acquired ultra-high-frequency detection signals; (3) extracting the waveform durations t of all the detection signals; (4) comparing the waveform durations t of the detection signals at different positions; and (5) determining that the position with minimum t is the position of a partial discharge source. Trials prove that the location method has the following beneficial effects: location can be performed by comparing the durations of different positions according to the durations of ultra-high-frequency partial discharge signals; and the method has the advantages of being simple and convenient, and easy to implement on site.
Description
Technical field
The present invention relates to a kind of GIS partial discharge localization method.
Background technology
GIS (Gas Insulated switchgear, gas-insulating and fully-enclosed combined electrical apparatus) is that the key in electrical network sets
It is standby, which has, and floor space is little, security reliability is high, it is easy to maintain the characteristics of, be currently the important electricity for being used in electrical network in a large number
Power equipment.Shelf depreciation is the premonitory phenomenon of insulation breakdown, before can realizing puncturing equipment by the detection to shelf depreciation
Early warning, this is significant for the safe operation of equipment.Superfrequency method is that a kind of local widely used in recent years is put
Electro-detection method, which is widely applied in the Site Detection of GIS.
For GIS partial discharge, how accurately to determine that source position is put in office is the key for carrying out Condition assessment of insulation
Step.It is many at present that time-of-arrival loaction is detected using super refreshing positioning mode or superfrequency.Side of the ultrasonic locating method using pointwise detection
Method, work on the spot amount are big, need substantial amounts of time and manpower.And superfrequency time difference rule is carried out using the time difference of two paths of signals
Positioning, cost intensive high to sampling request, and need artificial participation.Therefore current GIS partial discharge source localization method is equal
The characteristics of there is unsuitable field conduct.
The content of the invention
It is an object of the invention to provide a kind of simple and convenient, it is easy to the GIS partial discharge localization method of field conduct.
A kind of GIS partial discharge localization method, which is particular in that, comprises the steps：
1) superfrequency Partial Discharge Detection is carried out respectively to the diverse location of GIS；
2) all superfrequency detection signals to obtaining carry out detection process；
3) extract the waveform duration t of all rectified signals；
4) the waveform duration t values of various location detection signal are compared；
5) shelf depreciation source position is at t values minimum.
Test proves that, its advantage is：The localization method of the present invention can be according to ultrahigh frequency partial discharge signal
Persistent period, the persistent period for comparing diverse location are positioned, with simple and convenient, it is easy to the advantage of field conduct.
Description of the drawings
Application principle schematic diagram of the accompanying drawing 1 for the inventive method, including：Partial Discharge Sources 1, disc insulator 2,
GIS shells 3, the detection signal 4 of first position disc insulator, the detection signal 5 of second position disc insulator.
Specific embodiment
It is found by the applicant that when ultrahigh-frequency signal is propagated in GIS, it is with the increase of propagation distance, continuous in GIS cavitys
Catadioptric, can cause increase its signal duration, can be positioned according to the size of its persistent period using the feature, this
Invention proposes a kind of new GIS partial discharge localization method based on this.The method has work on the spot amount little, it is easy to which scene is real
The characteristics of applying.
Embodiment 1：
A kind of GIS partial discharge localization method, comprises the steps：
1) superfrequency Partial Discharge Detection is carried out respectively to the diverse location of GIS；
2) all superfrequency detection signals to obtaining carry out detection process；
3) extract the waveform duration t of all rectified signals；
4) the waveform duration t values of various location detection signal are compared；
5) office is at t values minimum put source shelf depreciation source position.
, to carry out live Partial Discharge Detection first to GIS, detection method is using extra-high for the specific implementation method of the present invention
Frequency method, carries out external detection at the disc insulator of GIS by extra-high video sensor, obtains the superfrequency detection of diverse location
Signal.Then detection process is carried out to ultrahigh-frequency signal, detection is processed as normal signal processing method.Rectified signal is counted
Calculate, extract its waveform duration t, the computational methods of t are to light from waveform zero, calculate when its waveform drops to 50% peak value
Time is used as waveform duration t.The relatively t of diverse location, is the position (theory that Partial Discharge Sources are located at t minimums
Upper test position is more intensive better, but considers actual field workload, will carry out test position according to the yardstick of actual GIS
Several selections.One universal suggestion is 1 meter of measurement, one point).It is capable of achieving using relatively simple method by above step
Realize the positioning of Partial Discharge Sources.
Application principle schematic diagrams of the Fig. 1 for the inventive method, including：Shelf depreciation 1, disc insulator 2, outside GIS
Shell 3, the detection signal 4 of first position disc insulator, the detection signal 5 of second position disc insulator.Onsite application
When the detection of ultrahigh-frequency signal is carried out at different disc insulators, detection process is carried out to ultrahigh-frequency signal, waveform is extracted
Envelope, calculates its waveform duration t.As the catadioptric of GIS cavitys is acted on, when detection signal puts source away from office, its
Waveform duration t can increase, and such as the detection signal 5 of second position disc insulator is than first position disc insulator
The waveform duration of detection signal 4 is big.The relatively t of diverse location, can be identified as the chamber that shelf depreciation occurs at t minimums
At body.
Above the present invention is described in detail, principle and embodiment party of the specific case used herein to the present invention
Formula is set forth, and the explanation of above example is only intended to help and understands the method for the present invention and its core concept；Meanwhile, it is right
In those skilled in the art, according to the thought of the present invention, will change in specific embodiments and applications, it is comprehensive
Upper described, this specification content should not be construed as limiting the invention.
Claims (1)
1. a kind of GIS partial discharge localization method, it is characterised in that comprise the steps：
1) superfrequency Partial Discharge Detection is carried out respectively to the diverse location of GIS；
2) all superfrequency detection signals to obtaining carry out detection process；
3) extract the waveform duration t of all rectified signals；
4) the waveform duration t values of various location detection signal are compared；
5) shelf depreciation source position is at t values minimum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610985114.5A CN106569112A (en) | 2016-10-31 | 2016-10-31 | GIS partial discharge location method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610985114.5A CN106569112A (en) | 2016-10-31 | 2016-10-31 | GIS partial discharge location method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106569112A true CN106569112A (en) | 2017-04-19 |
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| CN201610985114.5A Pending CN106569112A (en) | 2016-10-31 | 2016-10-31 | GIS partial discharge location method |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108993A (en) * | 2019-05-31 | 2019-08-09 | 国网青海省电力公司检修公司 | A kind of multiband three-dimensional joint test method for power equipment shelf depreciation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911437A (en) * | 2016-04-11 | 2016-08-31 | 国网天津市电力公司 | Method for accurately positioning GIS partial discharge |
-
2016
- 2016-10-31 CN CN201610985114.5A patent/CN106569112A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911437A (en) * | 2016-04-11 | 2016-08-31 | 国网天津市电力公司 | Method for accurately positioning GIS partial discharge |
Non-Patent Citations (1)
| Title |
|---|
| 郑书生: "《变压器绕组中局部放电特高频定位方法研究》", 《中国博士学位论文全文数据库.工程科技Ⅱ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108993A (en) * | 2019-05-31 | 2019-08-09 | 国网青海省电力公司检修公司 | A kind of multiband three-dimensional joint test method for power equipment shelf depreciation |
| CN110108993B (en) * | 2019-05-31 | 2021-05-07 | 国网青海省电力公司检修公司 | Multi-frequency-band three-dimensional combined test method for partial discharge of power equipment |
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Application publication date: 20170419 |