CN106291271A - Judge the live detection method of combined electrical apparatus high-voltage and earth potential electric discharge - Google Patents
Judge the live detection method of combined electrical apparatus high-voltage and earth potential electric discharge Download PDFInfo
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- CN106291271A CN106291271A CN201610583816.0A CN201610583816A CN106291271A CN 106291271 A CN106291271 A CN 106291271A CN 201610583816 A CN201610583816 A CN 201610583816A CN 106291271 A CN106291271 A CN 106291271A
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- superfrequency
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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
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- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Testing Relating To Insulation (AREA)
Abstract
Invention relates to a kind of live detection method judging combined electrical apparatus high-voltage and earth potential electric discharge, its technical characterstic comprises the following steps: is individually positioned in by two superfrequency sensors directly over the combined electrical apparatus air chamber both sides disc insulator that electric discharge occurs, gathers the signal time difference Δ t1 of two superfrequency sensors；Keep a superfrequency sensing station constant, before being placed on by an other superfrequency sensor immediately below disc insulator, gather the signal time difference Δ t2 of two superfrequency sensors；The most identical with Δ t2 according to Δ t1, it is judged that combined electrical apparatus high-voltage discharges with earth potential.The present invention is reasonable in design, can accurately judge that the internal electric discharge occurred of combined electrical apparatus is positioned at high-voltage or earth potential, contribute to device interior defect is accurately positioned, qualitative, can further improve the accuracy of live detection partial discharge location, and provide feasibility instruction for overhaul of the equipments.
Description
Technical field
Invention belongs to electrical safety technical field, a kind of judges combined electrical apparatus high-voltage and earth potential electric discharge
Live detection method.
Background technology
At present, combined electrical apparatus is carried out live detection technology and has reached its maturity, state's Intranet utilize ultrasonic, superfrequency is charged
Detection means is found that more combined electric appliance equipment defect.Judge that the internal electric discharge occurred of combined electrical apparatus is positioned at high-voltage
Or earth potential, not yet has and proposes clear and definite method, it is judged that discharge source position will assist in accurately determining device interior defect
Position, qualitative, for overhaul of the equipments provide feasibility instruction.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that one is reasonable in design, positioning and qualitative is sentenced accurately
The live detection method that disconnected combined electrical apparatus high-voltage discharges with earth potential.
The present invention solves it and technical problem is that and take techniques below scheme to realize:
A kind of live detection method judging combined electrical apparatus high-voltage and earth potential electric discharge, comprises the following steps:
Step 1, two superfrequency sensors are individually positioned in the combined electrical apparatus air chamber both sides benzvalene forms insulation that electric discharge occurs
Directly over son, two superfrequency sensor signal output leads are accessed high-speed oscilloscope, gather the letter of two superfrequency sensors
Number time difference Δ t1；
Step 2, one superfrequency sensing station of holding are constant, basin before being placed on by an other superfrequency sensor
Immediately below formula insulator, two superfrequency sensor signal output leads are accessed high-speed oscilloscope, gather two superfrequency sensings
The signal time difference Δ t2 of device；
Two that if the signal time difference Δ t1 of two superfrequency sensors that step 3 step 1 gathers and step 2 gather
The signal time difference Δ t2 of superfrequency sensor is identical, then explanation internal discharge source is positioned at combined electrical apparatus high-voltage；During such as signal
Δ t1 is different from signal time difference Δ t2 for difference, then explanation internal discharge source is positioned at combined electrical apparatus earth potential.
Described high-speed oscilloscope is four-way high-speed oscilloscope, its analog bandwidth >=1GHz, sample rate >=4GHz.
Advantages of the present invention and good effect be:
Two superfrequency sensors are placed on the diverse location of combined electrical apparatus air chamber both sides disc insulator by the present invention, and
Gather the signal time difference of two superfrequency sensors, thus accurately judge that the internal electric discharge occurred of combined electrical apparatus is positioned at high-tension electricity
Position or earth potential, contribute to being accurately positioned device interior defect, qualitative, can further improve live detection partial discharge location
Accuracy, and for overhaul of the equipments provide feasibility instruction.
Accompanying drawing explanation
Fig. 1 is the present invention two superfrequency transducer arrangements schematic diagrams in step 1；
Fig. 2 is the present invention two superfrequency transducer arrangements schematic diagrams in step 2.
Detailed description of the invention
Below in conjunction with accompanying drawing, inventive embodiments is further described:
A kind of live detection method judging combined electrical apparatus high-voltage and earth potential electric discharge, needs to use live detection instrument
Device and two superfrequency sensors, described live detection instrument uses four-way high-speed oscilloscope, analog bandwidth >=1GHz, sampling
Rate >=4GHz, concrete grammar comprises the following steps:
Step 1, two superfrequency sensors are individually positioned in the combined electrical apparatus air chamber both sides benzvalene forms insulation that electric discharge occurs
Directly over son, two superfrequency sensor signal output leads access high-speed oscilloscope, gather the signal of two superfrequency sensors
The time difference, being recorded as Δ t1, superfrequency sensor arrangement method is as shown in Figure 1.
Step 2, one superfrequency sensing station of holding are constant, basin before being placed on by an other superfrequency sensor
Immediately below formula insulator, two superfrequency sensor signal output leads are accessed high-speed oscilloscope, gather two superfrequency sensings
The signal time difference of device, being recorded as Δ t2, superfrequency sensor arrangement method is as shown in Figure 2.
Two that if the signal time difference Δ t1 of two superfrequency sensors that step 3 step 1 gathers and step 2 gather
The signal time difference Δ t2 of superfrequency sensor is identical, then explanation internal discharge source is positioned at combined electrical apparatus high-voltage, during such as signal
Δ t1 is different from signal time difference Δ t2 for difference, then explanation internal discharge source is positioned at combined electrical apparatus earth potential.
By above step, i.e. can effectively judge that combined electrical apparatus high-voltage discharges with earth potential, contribute to equipment
Being accurately positioned of internal flaw, qualitative, provide feasibility instruction for overhaul of the equipments.
The Cleaning Principle of the present invention is: owing to combined electrical apparatus air chamber is cylinder, if electric discharge occurs at high-voltage also
It is exactly near high-pressure conductor, then in any case the position of mobile two superfrequency sensors, as long as keeping being placed on both sides basin
At formula insulator, then the propagation distance of electromagnetic wave signal will not change, if generating occurs at earth potential i.e. equipment shell
Internal surface, then after mobile superfrequency sensor, the propagation distance of electromagnetic wave signal will change, and utilizes the method the most permissible
Effectively judge that combined electrical apparatus high-voltage discharges with earth potential.
It is emphasized that the embodiment described in invention is illustrative rather than determinate, therefore invention includes also
It is not limited to the embodiment described in detailed description of the invention, every is drawn according to the technical scheme of invention by those skilled in the art
Other embodiments, also belong to the scope of invention protection.
Claims (2)
1. the live detection method judging combined electrical apparatus high-voltage and earth potential electric discharge, it is characterised in that include following step
Rapid:
Step 1, two superfrequency sensors are being individually positioned in occur electric discharge combined electrical apparatus air chamber both sides disc insulator just
Two superfrequency sensor signal output leads are accessed high-speed oscilloscope by top, when gathering the signal of two superfrequency sensors
Difference Δ t1；
Step 2, one superfrequency sensing station of holding are constant, and before being placed on by an other superfrequency sensor, benzvalene form is exhausted
Immediately below edge, two superfrequency sensor signal output leads are accessed high-speed oscilloscope, gather two superfrequency sensors
Signal time difference Δ t2；
If gather two of the signal time difference Δ t1 of two superfrequency sensors that step 3 step 1 gathers and step 2 are extra-high
The signal time difference Δ t2 of video sensor is identical, then explanation internal discharge source is positioned at combined electrical apparatus high-voltage；Such as signal time difference Δ
T1 is different from signal time difference Δ t2, then explanation internal discharge source is positioned at combined electrical apparatus earth potential.
The live detection method that judgement combined electrical apparatus high-voltage the most according to claim 1 discharges with earth potential, it is special
Levy and be: described high-speed oscilloscope is four-way high-speed oscilloscope, its analog bandwidth >=1GHz, sample rate >=4GHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610583816.0A CN106291271B (en) | 2016-07-19 | 2016-07-19 | Judge the live detection method of combined electrical apparatus high-voltage potential and ground potential electric discharge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610583816.0A CN106291271B (en) | 2016-07-19 | 2016-07-19 | Judge the live detection method of combined electrical apparatus high-voltage potential and ground potential electric discharge |
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| CN106291271A true CN106291271A (en) | 2017-01-04 |
| CN106291271B CN106291271B (en) | 2018-12-07 |
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| CN201610583816.0A Active CN106291271B (en) | 2016-07-19 | 2016-07-19 | Judge the live detection method of combined electrical apparatus high-voltage potential and ground potential electric discharge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109917237A (en) * | 2017-12-12 | 2019-06-21 | 上海莫克电子技术有限公司 | Hand-hold GIS partial discharge location instrument and partial discharge location system |
| CN113740673A (en) * | 2021-07-15 | 2021-12-03 | 贵州电网有限责任公司 | Fault insulator online detection device and detection method based on magnetic array |
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| CN101655536A (en) * | 2008-08-19 | 2010-02-24 | 华东电力试验研究院有限公司 | Method for detecting partial discharge of gas insulated switchgear |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109917237A (en) * | 2017-12-12 | 2019-06-21 | 上海莫克电子技术有限公司 | Hand-hold GIS partial discharge location instrument and partial discharge location system |
| CN113740673A (en) * | 2021-07-15 | 2021-12-03 | 贵州电网有限责任公司 | Fault insulator online detection device and detection method based on magnetic array |
| CN113740673B (en) * | 2021-07-15 | 2024-05-03 | 贵州电网有限责任公司 | Fault insulator online detection device and detection method based on magnetic array |
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| CN106291271B (en) | 2018-12-07 |
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