CN109085480A - It is a kind of for detecting the system and method for GIS internal discharge information - Google Patents
It is a kind of for detecting the system and method for GIS internal discharge information Download PDFInfo
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- 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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- 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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Abstract
The system and method that the invention discloses a kind of for detecting GIS internal discharge information belongs to power transmission and transforming equipment technical field.Present system include: day blind single-photon detector, extra-high video sensor, High Frequency Current Sensor, capture card and processing equipment, processing equipment is used to whether collect voltage signal, ultrahigh-frequency signal or pulse current by comparing acquisition channel whether discharge inside GIS to determine, detects GIS internal discharge information according to acquisition channel voltage signal collected, ultrahigh-frequency signal or pulse current when determining GIS internal discharge.The present invention improves the reliability of GIS internal discharge measurement sensitivity, interference free performance and the accuracy of diagnosis, diagnostic result, it can be realized single photon detection and the diagnosis of GIS internal discharge, detecting band be day blind ultraviolet band, can be realized electric discharge type identification, electric discharge measurement, etc. functions.
Description
Technical field
The present invention relates to power transmission and transforming equipment technical fields, and more particularly, to one kind for detecting GIS internal discharge
The system and method for information.
Background technique
With the extensive use of gas insulated combined electrical equipment (GIS), the operational reliability of GIS device also gradually causes state
The common concern of border society and power department.From the point of view of nearly 40 years operating experience, insulation fault is to influence GIS reliability always
One of an important factor for.Shelf depreciation is to lead to GIS device insulation degradation until the main forms that arcing fault occurs.
Typical discharges defect is broadly divided into (basin in the discharge defect and solid insulation in SF6 gas by the position that electric discharge occurs inside GIS
Formula insulator, supporting insulator) discharge defect two major classes discharge defect, wherein the discharge defect in SF6 gas can be divided into again
Current potential electric discharge, low-pressure side are floated in the point discharge of point discharge, low-pressure side (GIS shell) on high-pressure conductor (bus), high-pressure side
The electric discharge of floating current potential, the suspended discharge of poor contact type etc.；It is dirty, golden that discharge defect on insulator can be divided into insulator surface
Metal particles and interior insulator crackle or air gap；Consider that the discharge defect on insulator is easy to lure from the position that electric discharge occurs
Edge flashing failure is sent out, harmfulness is greater than the harmfulness of the electric discharge in SF6 gas.
Inside GIS device, the duration of partial discharge pulse is very short, and the rise time of wave head is only 1ns or so, this
Kind of duration extremely short steep-sided pulse, the shelf depreciation electromagnetic wave signal comprising up to upper GHz, shelf depreciation can be in GIS device
The electromagnetic wave of flowing is generated on shell, has high-frequency discharge pulse current to flow through on ground line, and high frequency voltage is presented simultaneously in shell over the ground
Electromagnetic wave is generated to surrounding space.Shelf depreciation can also make channel gas pressure abruptly increase, and ultrasound is generated in GIS device gas
Wave, reflection and transmission can be occurred by passing to metal shell, and occur various sound waves on metal shell, such as longitudinal wave, shear wave and surface wave
Deng.Shelf depreciation in GIS device also generates light and decomposes SF6 gas.These with shelf depreciation occur physics and change
Effect change is to realize the foundation of GIS device on-line checking.Currently used for mainly superfrequency on site is widely applied
Method, supercritical ultrasonics technology, the analysis of SF6 gas decomposition product.
The detection sensitivity of supercritical ultrasonics technology is lower, not sensitive enough but right for some insulating inner discharge defect type detections
It is preferable in free metal particle fault detection effect.Meanwhile this method judges relative difficulty to discharge fault type, can not achieve
The calibration of Apparent discharge magnitude.The sensitivity of superfrequency (UHF) method is higher, but is difficult to characterize shelf depreciation with ultrahigh-frequency signal amplitude
Severity, it is difficult to realize the calibration etc. of Apparent discharge magnitude.For gas decomposition product analytic approach, due to shelf depreciation insulation defect
Type and electric discharge development process in not yet establish specific incidence relation between SF6 gas decomposition components, not yet formation picture
Chromatographic Analysis of Transformer oil mature like that directive/guide and judgment criteria, it is still necessary to from laboratory simulation defect failure and field failure
The accumulation of case carries out a large amount of research work, and this method is caused accurate judgement fault type and can not to be applied to practical online
In monitoring.
In SF6In gas, the spectrum of corona discharge radiation is concentrated mainly near ultraviolet region, wherein in 250nm to 400nm
Near ultraviolet region there are continuous spectral peaks, provide important evidence for the spectral region of Photoelectric Detection.Currently, being put to power equipment
The optical means means of electro-detection are numerous, are broadly divided into optical imaging techniques do, optical pulse method, and pass through infrared thermoviewer, ultraviolet
The equipment such as imager are realized.The such methods optical measurement high dependent on cost, display equipment, and there are at high cost, behaviour
Make complexity, sensitivity deficiency, early discharge danger is difficult to forecast, is unable to the disadvantages of quantificational expression degree of discharge, therefore urgently
It is proposed the electrical combined diagnostic system of shelf depreciation at low cost, high sensitivity and effective detection GIS.
Summary of the invention
To realize, measurement of partial discharge and electric discharge type diagnose the present invention in GIS, improve measurement of partial discharge sensitivity, resist
The accuracy of jamming performance and diagnosis, diagnostic result reliability, propose and a kind of be for detect GIS internal discharge information
System, comprising:
Day blind single-photon detector, for detecting whether GIS internal discharge generates ultraviolet signal, when GIS internal discharge
When generating ultraviolet signal, day, blind single-photon detector received the non-solar-blind band that GIS internal discharge generates as 260nm~280nm
Ultraviolet signal, the non-solar-blind band be 260nm~280nm ultraviolet signal be converted into via day blind single-photon detector
Voltage signal is simultaneously transmitted to capture card；
Extra-high video sensor, for detecting whether GIS internal discharge generates ultrahigh-frequency signal, when GIS internal discharge generates
When ultrahigh-frequency signal, extra-high video sensor receives ultrahigh-frequency signal and is transmitted to capture card；
High Frequency Current Sensor, for detecting whether GIS internal discharge generates pulse current, when GIS internal discharge generates
When pulse current, High Frequency Current Sensor receives the pulse current that GIS internal discharge generates and is transmitted to capture card；
Capture card has multiple acquisition channels, and each acquisition channel is provided with triggering level, when the electricity of any channel reception
After pressing the amplitude of signal, ultrahigh-frequency signal or pulse current to be greater than the triggering amplitude of triggering level, acquisition channel is connected in capture card
Carry out multichannel synchronousing collection voltage signal, ultrahigh-frequency signal and pulse current；And
Processing equipment, for whether collecting voltage signal, ultrahigh-frequency signal or pulse current by comparing acquisition channel
Whether discharge inside GIS to determine, when determining GIS internal discharge according to acquisition channel voltage signal collected, superfrequency
Signal or pulse current detect GIS internal discharge information.
Optionally, discharge information includes: electric discharge type, discharge capacity and corona area.
Optionally, capture card carries out more acquisition channel synchronous acquisitions after can be set to special modality triggering.
Optionally, special modality includes: voltage signal trigger port, ultrahigh-frequency signal trigger port and pulsed current signal
Trigger port.
Optionally, processing equipment passes through the voltage signal of drafting acquisition channel acquisition, ultrahigh-frequency signal or pulse current
Time-domain pulse train map, phase map are compared with standard electric discharge map, identify GIS electric discharge type.
Optionally, number of photons calculates electric discharge corona area during processing equipment is by statistics electric discharge, in conjunction with current impulse
Signal calculates discharge capacity.
The present invention also proposes a kind of method for detecting GIS internal discharge information, comprising:
Day, whether blind single-photon detector detection GIS electric discharge generated ultraviolet signal, generated ultraviolet signal when GIS discharges
When, day, blind single-photon detector received the ultraviolet signal that the non-solar-blind band that GIS electric discharge generates is 260nm~280nm, the day
Blind wave band is converted into voltage signal and is transmitted to and adopts for the ultraviolet signal of 260nm~280nm via day blind single-photon detector
Truck；
Whether extra-high video sensor detection GIS electric discharge generates ultrahigh-frequency signal, when GIS, which discharges, generates ultrahigh-frequency signal,
Extra-high video sensor receives ultrahigh-frequency signal and is transmitted to capture card；
Whether High Frequency Current Sensor detection GIS electric discharge generates pulse current, high when GIS, which discharges, generates pulse current
Frequency current sensor receives the pulse current that GIS electric discharge generates and is transmitted to capture card；
The amplitude of the voltage signal of any channel reception of capture card, ultrahigh-frequency signal or pulse current is greater than triggering level
Triggering amplitude after, capture card be connected acquisition channel carry out multichannel synchronousing collection voltage signal, ultrahigh-frequency signal and pulse electricity
Stream；
Processing equipment is determined by comparing whether acquisition channel collects voltage signal, ultrahigh-frequency signal or pulse current
Whether GIS discharges, when determining GIS electric discharge according to acquisition channel voltage signal collected, ultrahigh-frequency signal or pulse current
Detect GIS discharge information.
Optionally, discharge information includes: electric discharge type, discharge capacity and corona area.
Optionally, determine whether GIS discharges according to collection result, specifically: day blind single-photon detector, superfrequency sensing
Device and High Frequency Current Sensor biography have signal, certainly exist electric discharge；Day blind single-photon detector and extra-high video sensor have letter
Number, there is electric discharge in High Frequency Current Sensor no signal, fainter and optical path of discharging is not blocked；Day blind single-photon detector and
High Frequency Current Sensor no signal, extra-high video sensor have signal, there is electric discharge, and fainter and optical path of discharging is blocked；Day is blind
There is no electric discharges for single-photon detector, High Frequency Current Sensor and the equal no signal of extra-high video sensor.
Optionally, the identification of electric discharge type include: according to electric discharge basis of characterization, carry out voltage signal, ultrahigh-frequency signal and
After the PRPD atlas analysis of pulse current determine electric discharge type, electric discharge basis of characterization by first pass through in advance normal electrode carry out electric discharge and
System calibrating obtains.
Optionally, it detects discharge capacity and corona area includes:
Ultraviolet signal photon first penetrates the photomultiplier tube that entrance window enters day blind single-photon detector, is connect by photocathode
Receipts are converted into electronics, form simultaneously output light electric current Ic, processing equipment calculates photoelectric current I according to the following formulac, photoelectric current IcAs
Discharge capacity:
Ic=nQEq
Wherein, n is the received photon numbers of unit time inner cathode, and QE is the quantum efficiency of photomultiplier tube, and q is electronics
Charge；
Singl e photon detection ultraviolet signal light pulse, light pulse number are number of photons, number of photons N and relatively corona area S's
Relationship are as follows:
N=k ∫ ∫ η (λ) ds+n+M
Wherein, k is corona area relative coefficient, and η (λ) is photon radiation efficiency, when ozone is less in corona, η (λ)=
1, and reduce with the increase of ozone concentration, n is dark-current pulse sum in test, and M is the ultraviolet light that corona outer layer generates
Signal photon amount.
The present invention can be realized single photon detection and the diagnosis of GIS internal discharge, and detecting band is day blind ultraviolet band, energy
Enough realize electric discharge type identification, electric discharge measurement, etc. functions.
The present invention is highly integrated by day blind single-photon detector, extra-high video sensor, High Frequency Current Sensor, three kinds of sensings
Device can be connected directly with capture card, and the synchronous acquisition of electro-optical signal is realized by capture card.It is put automatically by processing equipment
The judgement of electric existence, can carry out optical path between discharge source and sensor, the judgement that electrical barrier blocks, and single sensing be used only
Device is compared, and the reliability and sensitivity of detection are improved.Processing equipment is calculated automatically from the PRPD spectrogram of electro-optical signal pulse
With time-domain pulse train spectrogram, is compared, obtained most close by the standard discharge mode spectrogram demarcated in advance with system
Electric discharge type, realize the identification of electric discharge type, be used only superfrequency detection method compared with, improve identification accuracy and spirit
Sensitivity.Processing equipment carries out step-by-step counting to light pulse sequence, calculates corona area when electric discharge, recombination current arteries and veins automatically
It rushes sequence and obtains photo-current pulse train, calculate discharge capacity automatically, discharge capacity is improved compared with Current Pulse Method is used only and is calculated
Sensitivity.
Detailed description of the invention
Fig. 1 is that the present invention is a kind of for detecting the system construction drawing of GIS internal discharge information；
Fig. 2 is that the present invention is a kind of for detecting the method flow diagram of GIS internal discharge information.
Specific embodiment
Exemplary embodiments of the present invention are introduced referring now to the drawings, however, the present invention can use many different shapes
Formula is implemented, and is not limited to the embodiment described herein, and to provide these embodiments be at large and fully disclose
The present invention, and the scope of the present invention is sufficiently conveyed to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements use identical attached
Icon note.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has person of ordinary skill in the field
It is common to understand meaning.Further it will be understood that with the term that usually used dictionary limits, should be understood as and its
The context of related fields has consistent meaning, and is not construed as Utopian or too formal meaning.
The invention proposes a kind of systems for detecting GIS internal discharge information, as shown in Figure 1, comprising:
Day blind single-photon detector, for detecting whether GIS internal discharge generates ultraviolet signal, when GIS internal discharge
When generating ultraviolet signal, day, blind single-photon detector received the non-solar-blind band that GIS internal discharge generates as 260nm~280nm
Ultraviolet signal, the non-solar-blind band be 260nm~280nm ultraviolet signal be converted into via day blind single-photon detector
Voltage signal is simultaneously transmitted to capture card；
Extra-high video sensor, for detecting whether GIS internal discharge generates ultrahigh-frequency signal, when GIS internal discharge generates
When ultrahigh-frequency signal, extra-high video sensor receives ultrahigh-frequency signal and is transmitted to capture card；
High Frequency Current Sensor, for detecting whether GIS internal discharge generates pulse current, when GIS internal discharge generates
When pulse current, High Frequency Current Sensor receives the pulse current that GIS internal discharge generates and is transmitted to capture card；
Capture card has multiple acquisition channels, and each acquisition channel is provided with triggering level, when the electricity of any channel reception
After pressing the amplitude of signal, ultrahigh-frequency signal or pulse current to be greater than the triggering amplitude of triggering level, acquisition channel is connected in capture card
Multichannel synchronousing collection voltage signal, ultrahigh-frequency signal and pulse current are carried out, capture card can be set to special modality triggering
After carry out more acquisition channel synchronous acquisitions, special modality includes: voltage signal trigger port, ultrahigh-frequency signal trigger port and arteries and veins
Rush current signal trigger port；
Processing equipment, for whether collecting voltage signal, ultrahigh-frequency signal or pulse current by comparing acquisition channel
Whether discharge inside GIS to determine, when determining GIS internal discharge according to acquisition channel voltage signal collected, superfrequency
Signal or pulse current detect GIS internal discharge information, and discharge information includes: electric discharge type, discharge capacity and corona area.Processing
Equipment is by drawing the voltage signal, ultrahigh-frequency signal or the time-domain pulse train map of pulse current, phase that acquisition channel acquires
Bitmap spectrum is compared with standard electric discharge map, identifies GIS electric discharge type.Photon during processing equipment is discharged by statistics
Number calculates electric discharge corona area, calculates discharge capacity in conjunction with current pulse signal.
The present invention also proposes a kind of method for detecting GIS internal discharge information, as shown in Figure 2, comprising:
Day, whether blind single-photon detector detection GIS electric discharge generated ultraviolet signal, generated ultraviolet signal when GIS discharges
When, day, blind single-photon detector received the ultraviolet signal that the non-solar-blind band that GIS electric discharge generates is 260nm~280nm, the day
Blind wave band is converted into voltage signal and is transmitted to and adopts for the ultraviolet signal of 260nm~280nm via day blind single-photon detector
Truck；
Whether extra-high video sensor detection GIS electric discharge generates ultrahigh-frequency signal, when GIS, which discharges, generates ultrahigh-frequency signal,
Extra-high video sensor receives ultrahigh-frequency signal and is transmitted to capture card；
Whether High Frequency Current Sensor detection GIS electric discharge generates pulse current, high when GIS, which discharges, generates pulse current
Frequency current sensor receives the pulse current that GIS electric discharge generates and is transmitted to capture card；
The amplitude of the voltage signal of any channel reception of capture card, ultrahigh-frequency signal or pulse current is greater than triggering level
Triggering amplitude after, capture card be connected acquisition channel carry out multichannel synchronousing collection voltage signal, ultrahigh-frequency signal and pulse electricity
Stream；
Processing equipment is determined by comparing whether acquisition channel collects voltage signal, ultrahigh-frequency signal or pulse current
Whether GIS discharges, when determining GIS electric discharge according to acquisition channel voltage signal collected, ultrahigh-frequency signal or pulse current
GIS discharge information is detected, discharge information includes: electric discharge type, discharge capacity and corona area.
Determine whether GIS discharges according to collection result, specifically: day blind single-photon detector, extra-high video sensor and height
Frequency current sensor biography has signal, certainly exists electric discharge；Day blind single-photon detector and extra-high video sensor have signal, high frequency
There is electric discharge in current sensor no signal, fainter and optical path of discharging is not blocked；Day blind single-photon detector and high-frequency current
Sensor no signal, extra-high video sensor have signal, there is electric discharge, and fainter and optical path of discharging is blocked；Day blind single-photon detecting
Surveying device, High Frequency Current Sensor and the equal no signal of extra-high video sensor, there is no electric discharges.
The identification of electric discharge type includes: to carry out voltage signal, ultrahigh-frequency signal and pulse current according to electric discharge basis of characterization
PRPD atlas analysis after determine electric discharge type, electric discharge basis of characterization by first pass through in advance normal electrode carry out electric discharge and system calibrating
It obtains.It is as shown in table 1 to diagnose basis of characterization:
Table 1
Detection discharge capacity and corona area include:
Ultraviolet signal photon first penetrates the photomultiplier tube that entrance window enters day blind single-photon detector, is connect by photocathode
Receipts are converted into electronics, form simultaneously output light electric current Ic, processing equipment calculates photoelectric current I according to the following formulac, photoelectric current IcAs
Discharge capacity:
Ic=nQEq
Wherein, n is the received photon numbers of unit time inner cathode, and QE is the quantum efficiency of photomultiplier tube, and q is electronics
Charge；
Singl e photon detection ultraviolet signal light pulse, light pulse number are number of photons, number of photons N and relatively corona area S's
Relationship are as follows:
N=k ∫ ∫ η (λ) ds+n+M
Wherein, k is corona area relative coefficient, and η (λ) is photon radiation efficiency, when ozone is less in corona, η (λ)=
1, and reduce with the increase of ozone concentration, n is dark-current pulse sum in test, and M is the ultraviolet light that corona outer layer generates
Signal photon amount.
The present invention can be realized single photon detection and the diagnosis of GIS internal discharge, and detecting band is day blind ultraviolet band, energy
Enough realize electric discharge type identification, electric discharge measurement, etc. functions.
The present invention is highly integrated by day blind single-photon detector, extra-high video sensor, High Frequency Current Sensor, three kinds of sensings
Device can be connected directly with capture card, and the synchronous acquisition of electro-optical signal is realized by capture card.It is put automatically by processing equipment
The judgement of electric existence, can carry out optical path between discharge source and sensor, the judgement that electrical barrier blocks, and single sensing be used only
Device is compared, and the reliability and sensitivity of detection are improved.Processing equipment is calculated automatically from the PRPD spectrogram of electro-optical signal pulse
With time-domain pulse train spectrogram, is compared, obtained most close by the standard discharge mode spectrogram demarcated in advance with system
Electric discharge type, realize the identification of electric discharge type, be used only superfrequency detection method compared with, improve identification accuracy and spirit
Sensitivity.Processing equipment carries out step-by-step counting to light pulse sequence, calculates corona area when electric discharge, recombination current arteries and veins automatically
It rushes sequence and obtains photo-current pulse train, calculate discharge capacity automatically, discharge capacity is improved compared with Current Pulse Method is used only and is calculated
Sensitivity.
Claims (11)
1. a kind of system for detecting GIS internal discharge information, the system comprises:
Day blind single-photon detector, for detecting whether GIS internal discharge generates ultraviolet signal, when GIS internal discharge generates
When ultraviolet signal, day, blind single-photon detector received the purple that the non-solar-blind band that GIS internal discharge generates is 260nm~280nm
Outer optical signal, the non-solar-blind band are that the ultraviolet signal of 260nm~280nm is converted into voltage via day blind single-photon detector
Signal is simultaneously transmitted to capture card；
Extra-high video sensor, for detecting whether GIS internal discharge generates ultrahigh-frequency signal, when the generation of GIS internal discharge is extra-high
When frequency signal, extra-high video sensor receives ultrahigh-frequency signal and is transmitted to capture card；
High Frequency Current Sensor, for detecting whether GIS internal discharge generates pulse current, when GIS internal discharge generates pulse
When electric current, High Frequency Current Sensor receives the pulse current that GIS internal discharge generates and is transmitted to capture card；
Capture card has multiple acquisition channels, and each acquisition channel is provided with triggering level, when the voltage of any channel reception is believed
Number, after the amplitude of ultrahigh-frequency signal or pulse current is greater than the triggering amplitude of triggering level, capture card is connected acquisition channel and carries out
Multichannel synchronousing collection voltage signal, ultrahigh-frequency signal and pulse current；And
Processing equipment, for coming really by comparing whether acquisition channel collects voltage signal, ultrahigh-frequency signal or pulse current
Determine whether to discharge inside GIS, when determining GIS internal discharge according to acquisition channel voltage signal collected, ultrahigh-frequency signal
Or pulse current detects GIS internal discharge information.
2. system according to claim 1, the discharge information includes: electric discharge type, discharge capacity and corona area.
3. system according to claim 1, the capture card carries out more acquisitions after can be set to special modality triggering
Channel Synchronous acquisition.
4. system according to claim 1, the special modality includes: voltage signal trigger port, ultrahigh-frequency signal
Trigger port and pulsed current signal trigger port.
5. system according to claim 1, the processing equipment is by drawing the voltage signal, spy that acquisition channel acquires
The time-domain pulse train map of high-frequency signal or pulse current, phase map are compared with standard electric discharge map, identify GIS
Electric discharge type.
6. system according to claim 1, number of photons calculates electric discharge during the processing equipment is discharged by statistics
Corona area calculates discharge capacity in conjunction with current pulse signal.
7. a kind of method for detecting GIS internal discharge information, which comprises
Day, whether blind single-photon detector detection GIS electric discharge generated ultraviolet signal, when GIS, which discharges, generates ultraviolet signal,
Day, blind single-photon detector received the ultraviolet signal that the non-solar-blind band that GIS electric discharge generates is 260nm~280nm, and the day is blind
Wave band is that the ultraviolet signal of 260nm~280nm is converted into voltage signal via day blind single-photon detector and is transmitted to acquisition
Card；
Whether extra-high video sensor detection GIS electric discharge generates ultrahigh-frequency signal, extra-high when GIS, which discharges, generates ultrahigh-frequency signal
Video sensor receives ultrahigh-frequency signal and is transmitted to capture card；
Whether High Frequency Current Sensor detection GIS electric discharge generates pulse current, when GIS, which discharges, generates pulse current, high-frequency electrical
Flow sensor receives the pulse current that GIS electric discharge generates and is transmitted to capture card；
The amplitude of the voltage signal of any channel reception of capture card, ultrahigh-frequency signal or pulse current is greater than the touching of triggering level
After sending out amplitude, capture card is connected acquisition channel and carries out multichannel synchronousing collection voltage signal, ultrahigh-frequency signal and pulse current；
Processing equipment determines GIS by comparing whether acquisition channel collects voltage signal, ultrahigh-frequency signal or pulse current
Whether discharge, is detected when determining GIS electric discharge according to acquisition channel voltage signal collected, ultrahigh-frequency signal or pulse current
GIS discharge information.
8. according to the method described in claim 7, the discharge information includes: electric discharge type, discharge capacity and corona area.
9. according to the method described in claim 7, described determine whether GIS discharges according to collection result, specifically: day blind list
Photon detector, extra-high video sensor and High Frequency Current Sensor biography have signal, certainly exist electric discharge；Day blind single photon detection
Device and extra-high video sensor have signal, and High Frequency Current Sensor no signal has electric discharge, and fainter and optical path of discharging is not hidden
Gear；Day blind single-photon detector and High Frequency Current Sensor no signal, extra-high video sensor have signal, there is electric discharge, discharge compared with
Faint and optical path is blocked；Day blind single-photon detector, High Frequency Current Sensor and the equal no signal of extra-high video sensor are not present
Electric discharge.
10. according to the method described in claim 7, the identification of the electric discharge type includes: to be carried out according to electric discharge basis of characterization
Electric discharge type is determined after the PRPD atlas analysis of voltage signal, ultrahigh-frequency signal and pulse current, the basis of characterization that discharges is by preparatory
Electric discharge is carried out by normal electrode and system calibrating obtains.
11. according to the method described in claim 7, the detection discharge capacity and corona area includes:
Ultraviolet signal photon first penetrates the photomultiplier tube that entrance window enters day blind single-photon detector, is received and turns by photocathode
Electronics is turned to, simultaneously output light electric current I is formedc, processing equipment calculates photoelectric current I according to the following formulac, photoelectric current IcAs discharge
Amount:
Ic=nQEq
Wherein, n is the received photon numbers of unit time inner cathode, and QE is the quantum efficiency of photomultiplier tube, and q is electronics electricity
Lotus；
Singl e photon detection ultraviolet signal light pulse, light pulse number are number of photons, the relationship of number of photons N and opposite corona area S
Are as follows:
N=k ∫ ∫ η (λ) ds+n+M
Wherein, k is corona area relative coefficient, and η (λ) is photon radiation efficiency, when ozone is less in corona, η (λ)=1, and
Reduce with the increase of ozone concentration, n is dark-current pulse sum in test, and M is the ultraviolet signal that corona outer layer generates
Photon amount.
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