CN109270414A - Day blind ultraviolet-cameras discharge examination sensitivity test method - Google Patents
Day blind ultraviolet-cameras discharge examination sensitivity test method Download PDFInfo
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- CN109270414A CN109270414A CN201810813900.6A CN201810813900A CN109270414A CN 109270414 A CN109270414 A CN 109270414A CN 201810813900 A CN201810813900 A CN 201810813900A CN 109270414 A CN109270414 A CN 109270414A
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- cameras
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- blind ultraviolet
- day blind
- ultraviolet
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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
- G01R31/1218—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 using optical methods; using charged particle, e.g. electron, beams or X-rays
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The present invention provides a kind of day blind ultraviolet-cameras discharge examination sensitivity test method, it include: offer test macro, test includes AC power source, corona point, impedor, shelf depreciation oscillograph, day blind ultraviolet-cameras and computer system, during the test, it is tested as steps described below: step 1, tip position is being imaged at needle point discharge position 10m using day blind ultraviolet-cameras, the 80% of maxgain value is set by gain, it focuses to infinity, the partial discharge ultraviolet light facular point that term day blind ultraviolet-cameras is shown in the case where closing lamp environment；Step 2, the pulse signal that fixed charge amount is injected using impulse correction generator are obtained the pulse signal amplitude that detection impedance coupler arrives in shelf depreciation oscillograph, obtain Apparent discharge magnitude calibration curve；Step 3 is gradually reduced test voltage, until day blind ultraviolet-cameras tells needle point discharge signal, records Apparent discharge magnitude at this time, the as minimum discharge capacity sensitivity of day blind ultraviolet-cameras.
Description
Technical field
The present invention relates to day blind ultraviolet-cameras technical fields, in particular to a kind of blind ultraviolet-cameras discharge examination spirit of day
Sensitivity test method.
Background technique
With the continuous expansion of national grid scale, power system load is continuously increased, the pressure of high-tension electricity equipment
It is increasing.The high-tension apparatus run in power grid is under the action of long-term electricity, heat, machinery and environmental factor it is possible that lacking
It falls into or failure will seriously affect the safety of operation of power networks the phenomenon that causing insulation performance to gradually decrease, generate corona discharge.
Day, blind ultraviolet-cameras utilized full-time blind Detection Techniques, the side merged using ultraviolet light and visible light Channel Image
Formula effectively can detect and position faint corona signal early stage power equipments defect formation, and then reduce failure
Probability, ensure power system security steadily run.Discharge examination sensitivity is evaluation day blind ultraviolet-cameras performance superiority and inferiority
Key index is the important references of power equipments defect detection application, it is embodied can observe most in predetermined distance
Small discharge capacity reflects day blind ultraviolet-cameras to the detectivity of weak discharge amount.Currently, not surveyed to day blind ultraviolet-cameras still
Certain standard is established in examination, also existing effective detection means not relevant to the test of discharge examination sensitivity, it is therefore desirable to
Study effective reliable test method of day blind ultraviolet-cameras discharge examination sensitivity.
Summary of the invention
It is an object of that present invention to provide a kind of blind ultraviolet-cameras discharge examination sensitivity test methods of day, and it is blind ultraviolet to detect day
Camera provides reliable detection foundation to the detectivity of weak discharge amount for the Performance Evaluation of day blind ultraviolet-cameras.
To reach above-mentioned purpose, the present invention proposes a kind of day blind ultraviolet-cameras discharge examination sensitivity test method, comprising:
A test macro is provided, which includes AC power source, corona point, impedor, shelf depreciation oscillography
Device, day blind ultraviolet-cameras and computer system, wherein AC power source, corona point and impedor is in series puts
Electrical circuit simultaneously simulates corona discharge by corona point, and shelf depreciation oscillograph (PDO) is connect with impedor for examining
Shelf depreciation parameter is surveyed, day, blind ultraviolet-cameras detected partial discharge ultraviolet light facular point, meter at needle point electric discharge certain position
Calculation machine system is connect with shelf depreciation oscillograph and day blind ultraviolet-cameras respectively；
During the test, it is tested as steps described below:
Step 1 is being imaged tip position at needle point discharge position 10m using day blind ultraviolet-cameras, and gain is set
It is set to the 80% of maxgain value, is focused to infinity, the partial discharge that term day blind ultraviolet-cameras is shown in the case where closing lamp environment is ultraviolet
Line facular point；
Step 2, the pulse signal that fixed charge amount is injected using impulse correction generator, in shelf depreciation oscillograph PDO
The pulse signal amplitude that detection impedance coupler arrives is obtained, to obtain Apparent discharge magnitude calibration curve；
Step 3 is gradually reduced test voltage, until day blind ultraviolet-cameras tells needle point discharge signal, records at this time
The minimum discharge capacity sensitivity of the blind ultraviolet-cameras of Apparent discharge magnitude, as day.
In further embodiment, in abovementioned steps 1, term day blind ultraviolet-cameras is shown in the case where closing lamp environment partial discharge
Ultraviolet light facular point, computer system collect and record the number of photons of every frame image of day blind ultraviolet-cameras output, acquire altogether
100 frames, if the number of photons of X frame image is CBX, i.e. CBXIndicate the number of photons under discharge off condition (i.e. ambient noise), then
Photon number mean value under the conditions of discharge offIt determines in the following manner:
In step 3, by being gradually reduced test voltage and discharge capacity, it is clearly detected day blind ultraviolet-cameras ultraviolet
Signal, and acquire the number of photons of every frame image of discharge capacity lower day blind ultraviolet-cameras outputs different from being recorded in, every time acquisition altogether
100 frames, if the number of photons of X frame image is CLX, i.e. CLXIt indicates in the case where there is discharging condition (i.e. ambient noise+actual signal)
Number of photons then has the photon number mean value under discharging conditionIt determines in the following manner:
IfThe Apparent discharge magnitude that then PD meter measures at this time be day blind ultraviolet-cameras minimum discharge capacity it is sensitive
Degree.
This remarkable advantage of the invention is: effectively detecting discharge capacity by the test macro and test process built
Maximum conditions, i.e.,And in test method of the invention, the interference of ambient noise is eliminated, is effectively increased true
The accuracy of real signal.
It should be appreciated that as long as aforementioned concepts and all combinations additionally conceived described in greater detail below are at this
It can be viewed as a part of the subject matter of the disclosure in the case that the design of sample is not conflicting.In addition, required guarantor
All combinations of the theme of shield are considered as a part of the subject matter of the disclosure.
Can be more fully appreciated from the following description in conjunction with attached drawing present invention teach that the foregoing and other aspects, reality
Apply example and feature.The features and/or benefits of other additional aspects such as illustrative embodiments of the invention will be below
Description in it is obvious, or learnt in practice by the specific embodiment instructed according to the present invention.
Detailed description of the invention
Attached drawing is not intended to drawn to scale.In the accompanying drawings, identical or nearly identical group each of is shown in each figure
It can be indicated by the same numeral at part.For clarity, in each figure, not each component part is labeled.
Now, example will be passed through and the embodiments of various aspects of the invention is described in reference to the drawings, in which:
Fig. 1 is the schematic diagram of this valve illustrative day blind ultraviolet-cameras discharge examination sensitivity test system.
Each label meaning is as follows in figure:
T --- AC power source；S --- corona discharge needle point；Z --- impedance；PDO --- partial discharge oscillograph.
Specific embodiment
In order to better understand the technical content of the present invention, special to lift specific embodiment and institute's accompanying drawings is cooperated to be described as follows.
Various aspects with reference to the accompanying drawings to describe the present invention in the disclosure, shown in the drawings of the embodiment of many explanations.
It is not intended to cover all aspects of the invention for embodiment of the disclosure.It should be appreciated that a variety of designs and reality presented hereinbefore
Those of apply example, and describe in more detail below design and embodiment can in many ways in any one come it is real
It applies, this is because conception and embodiment disclosed in this invention are not limited to any embodiment.In addition, disclosed by the invention one
A little aspects can be used alone, or otherwise any appropriately combined use with disclosed by the invention.
As shown in connection with fig. 1, disclosure according to the present invention, a kind of day blind ultraviolet-cameras discharge examination sensitivity test system,
For the blind ultraviolet-cameras electric discharge sensitivity of test day.The test includes AC power source T, corona point S, impedor Z, office
Portion's electric discharge oscillograph PDO, day blind ultraviolet-cameras and computer system, wherein AC power source, corona point and impedance
Element discharge loop in series simultaneously simulates corona discharge, shelf depreciation oscillograph (PDO) and impedance by corona point
Element connection for detecting shelf depreciation parameter, day blind ultraviolet-cameras at needle point electric discharge certain position detection partial discharge it is ultraviolet
Line facular point, computer system are connect with shelf depreciation oscillograph and day blind ultraviolet-cameras respectively.
During the test, it is tested as steps described below:
Step 1 is being imaged tip position at needle point discharge position 10m using day blind ultraviolet-cameras, and gain is set
It is set to the 80% of maxgain value, is focused to infinity, the partial discharge that term day blind ultraviolet-cameras is shown in the case where closing lamp environment is ultraviolet
Line facular point；
Step 2, the pulse signal that fixed charge amount is injected using impulse correction generator, in shelf depreciation oscillograph PDO
The pulse signal amplitude that detection impedance coupler arrives is obtained, to obtain Apparent discharge magnitude calibration curve；
Step 3 is gradually reduced test voltage, until day blind ultraviolet-cameras tells needle point discharge signal, records at this time
The minimum discharge capacity sensitivity of the blind ultraviolet-cameras of Apparent discharge magnitude, as day.
In further embodiment, in abovementioned steps 1, term day blind ultraviolet-cameras is shown in the case where closing lamp environment partial discharge
Ultraviolet light facular point, computer system collect and record the number of photons of every frame image of day blind ultraviolet-cameras output, acquire altogether
100 frames, if the number of photons of X frame image is CBX, i.e. CBXIndicate the number of photons under discharge off condition (i.e. ambient noise), then
Photon number mean value under the conditions of discharge offIt determines in the following manner:
In step 3, by being gradually reduced test voltage and discharge capacity, it is clearly detected day blind ultraviolet-cameras ultraviolet
Signal, and acquire the number of photons of every frame image of discharge capacity lower day blind ultraviolet-cameras outputs different from being recorded in, every time acquisition altogether
100 frames, if the number of photons of X frame image is CLX, i.e. CLXIt indicates in the case where there is discharging condition (i.e. ambient noise+actual signal)
Number of photons then has the photon number mean value under discharging conditionIt determines in the following manner:
IfThe Apparent discharge magnitude that then PD meter measures at this time be day blind ultraviolet-cameras minimum discharge capacity it is sensitive
Degree.
In test macro of the invention, the test suite being made of AC power source, corona point, impedor is office
Portion's electrion equipment, input voltage: 200V；Output voltage: 100kV；Voltage rating partial discharge amount≤5pC；Impedance voltage: <
8%；No-load current :≤4%；Wave distortion: < 3%.In optional example, the office of HKYDQW-10/100 model can be used
Portion's electrion equipment.
Shelf depreciation oscillograph PDO can choose the partial discharge oscillograph of HRJFD-3B model in some embodiments, can
The capacitance swing 6pF--250 μ F of test；Amplifier gain is adjusted: six grades of coarse adjustment, 20 ± 1dB of gain between shelves；Fine tuning range >
20dB；15 °~150 ° of time window window width adjustable extent；Pointer header: logarithmic scale 1-10-100 error < ± 5% is (with full quarter
Degree meter), linear graduation 0-1000 error < ± 5% (in terms of full scale).
This remarkable advantage of the invention is: effectively detecting discharge capacity by the test macro and test process built
Maximum conditions, i.e.,And in test method of the invention, the interference of ambient noise is eliminated, is effectively increased true
The accuracy of real signal.
Although the present invention has been disclosed as a preferred embodiment, however, it is not to limit the invention.Skill belonging to the present invention
Has usually intellectual in art field, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations.Cause
This, the scope of protection of the present invention is defined by those of the claims.
Claims (4)
1. a kind of day blind ultraviolet-cameras discharge examination sensitivity test method characterized by comprising
A test macro is provided, which includes AC power source, corona point, impedor, shelf depreciation oscillograph, day
Blind ultraviolet-cameras and computer system, wherein AC power source, corona point and impedor is in series discharges back
Corona discharge is simultaneously simulated by corona point in road, and shelf depreciation oscillograph (PDO) is connect for detection office with impedor
Portion's discharge parameter, day, blind ultraviolet-cameras detected partial discharge ultraviolet light facular point, computer at needle point electric discharge certain position
System is connect with shelf depreciation oscillograph and day blind ultraviolet-cameras respectively；
During the test, it is tested as steps described below:
Step 1 is being imaged tip position at needle point discharge position 10m using day blind ultraviolet-cameras, sets gain to
The 80% of maxgain value is focused to infinity, the partial discharge ultraviolet that term day blind ultraviolet-cameras is shown in the case where closing lamp environment
Spot bright spot；
Step 2, the pulse signal that fixed charge amount is injected using impulse correction generator, are obtained in shelf depreciation oscillograph PDO
The pulse signal amplitude that detection impedance coupler arrives, to obtain Apparent discharge magnitude calibration curve；
Step 3 is gradually reduced test voltage, until day blind ultraviolet-cameras tells needle point discharge signal, the view recorded at this time exists
The minimum discharge capacity sensitivity of the blind ultraviolet-cameras of discharge capacity, as day.
2. day blind ultraviolet-cameras discharge examination sensitivity test method according to claim 1, which is characterized in that aforementioned
In step 1, the partial discharge ultraviolet light facular point that term day blind ultraviolet-cameras is shown in the case where closing lamp environment, computer system is acquired simultaneously
The number of photons for recording every frame image of day blind ultraviolet-cameras output, acquires 100 frames, if the number of photons of X frame image is C altogetherBX, i.e.,
CBXIndicate number of photons under the conditions of discharge off, then the photon number mean value under the conditions of discharge offIt determines in the following manner:
In step 3, by being gradually reduced test voltage and discharge capacity, day blind ultraviolet-cameras is made to be clearly detected ultraviolet letter
Number, and the number of photons of every frame image of discharge capacity lower day blind ultraviolet-cameras outputs different from being recorded in is acquired, acquire 100 altogether every time
Frame, if the number of photons of X frame image is CLX, i.e. CLXIt indicates the number of photons in the case where there is discharging condition, then has the light under discharging condition
Subnumber average valueIt determines in the following manner:
IfThe Apparent discharge magnitude that then PD meter measures at this time is the minimum discharge capacity sensitivity of day blind ultraviolet-cameras.
3. day blind ultraviolet-cameras discharge examination sensitivity test method according to claim 1, which is characterized in that by exchanging
The test suite that power supply, corona point, impedor are constituted is partial high pressure discharge equipment, the partial high pressure discharge equipment
Meet: input voltage: 200V；Output voltage: 100kV；Voltage rating partial discharge amount≤5pC；Impedance voltage: < 8%；No-load current:
≤ 4%；Wave distortion: < 3%.
4. day blind ultraviolet-cameras discharge examination sensitivity test method according to claim 1, which is characterized in that the office
Portion's electric discharge oscillograph meets: testable capacitance swing 6pF--250 μ F；Amplifier gain is adjusted: six grades of coarse adjustment, being increased between shelves
20 ± 1dB of benefit；Fine tuning range > 20dB；15 °~150 ° of time window window width adjustable extent；Pointer header: logarithmic scale 1-10-
100 errors < ± 5%, linear graduation 0-1000 error < ± 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810813900.6A CN109270414A (en) | 2018-07-23 | 2018-07-23 | Day blind ultraviolet-cameras discharge examination sensitivity test method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810813900.6A CN109270414A (en) | 2018-07-23 | 2018-07-23 | Day blind ultraviolet-cameras discharge examination sensitivity test method |
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| CN109270414A true CN109270414A (en) | 2019-01-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111856383A (en) * | 2020-07-28 | 2020-10-30 | 红相股份有限公司 | Indirect measurement method for sensitivity of high-frequency pulse sensor |
| CN113376430A (en) * | 2021-05-31 | 2021-09-10 | 国网河南省电力公司平顶山供电公司 | Transformer substation pipe bus state distinguishing device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111856383A (en) * | 2020-07-28 | 2020-10-30 | 红相股份有限公司 | Indirect measurement method for sensitivity of high-frequency pulse sensor |
| CN111856383B (en) * | 2020-07-28 | 2022-08-23 | 红相股份有限公司 | Indirect measurement method for sensitivity of high-frequency pulse sensor |
| CN113376430A (en) * | 2021-05-31 | 2021-09-10 | 国网河南省电力公司平顶山供电公司 | Transformer substation pipe bus state distinguishing device |
| CN113376430B (en) * | 2021-05-31 | 2022-05-17 | 国网河南省电力公司平顶山供电公司 | Transformer substation pipe bus state distinguishing device |
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