CN107015129A - The detecting system and method for GIS partial discharge characteristic - Google Patents
The detecting system and method for GIS partial discharge characteristic Download PDFInfo
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- CN107015129A CN107015129A CN201710317934.1A CN201710317934A CN107015129A CN 107015129 A CN107015129 A CN 107015129A CN 201710317934 A CN201710317934 A CN 201710317934A CN 107015129 A CN107015129 A CN 107015129A
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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
Abstract
The present invention discloses a kind of detecting system and method for GIS partial discharge characteristic, is related to technical field of power systems, to solve the problem of existing GIS Characteristics of Partial Discharge detection method can not accurately detect GIS Characteristics of Partial Discharge.The detecting system of the GIS partial discharge characteristic includes：GIS insulation defects analogue means, alternating-current voltage source, direct voltage source and partial-discharge measuring device parallel with one another；Wherein, GIS insulation defects analogue means is used for gradually the different insulative defect of Simulated GlS, when direct voltage source and alternating-current voltage source are powered for GIS insulation defect analogue means simultaneously, generates different local discharge signals；Partial-discharge measuring device is handled local discharge signal, generates GIS each self-corresponding partial discharge pulse's waveform of different insulative defect.The detecting system for the GIS partial discharge characteristic that the present invention is provided is used to detect GIS partial discharge characteristic.
Description
Technical field
The present invention relates to detecting system and the side of technical field of power systems, more particularly to a kind of GIS partial discharge characteristic
Method.
Background technology
Cubicle Gas-Insulated Switchgear (Gas-insulated metal-enclosed switchgear, below
Abbreviation GIS) it is that the elements such as breaker, disconnecting switch, earthed switch, bus, transformer and arrester are loaded into sealed metal
In container, and it regard the insulating gas filled in the canister as insulation and the enclosed switchgear of arc-extinguishing medium.GIS because
It has the advantages that small small volume, floor space, strong environmental adaptability, high operational reliability, high safety and maintenance are simple,
It is widely used in power plant and transformer station.
GIS primarily serves the break-make control and protective effect of power system in power plant and transformer station, so if GIS
There is operation troubles, it will continuity, stability that influence power plant and transformer station power, cause economic loss.And GIS occurs
Operation troubles it is usually because manufacture GIS during, inside the insulated cavity that insulation gas filled canister is constituted
There can be the insulation defects such as high-pressure conductor spine, housing spine, free conducting particle, disc insulator attachment foreign matter.When there is height
When pressure puts on GIS, the presence of these insulation defects may result in the part that there are these insulation defect positions in GIS insulated cavities
Electric-field intensity increases, and shelf depreciation occurs, and then causes GIS operation troubles occur.Generally, there is local put in GIS
All can be with there are the signals such as pulse current, ultrasonic wave and electromagnetic wave, by being detected to one kind in these signals when electric
GIS Characteristics of Partial Discharge can be drawn.
The detection method of conventional GIS partial discharge characteristic has pulse current method and superfrequency detection method.But, use arteries and veins
When being detected when rushing the pulse current that current method produces to GIS shelf depreciation, during its measuring system progress signal collection without
Method discrimination and a variety of electromagnetic signals local discharge signal mixed in together, therefore in this way, if not by other
Detection instrument, then can not accurately detect GIS Characteristics of Partial Discharge.And the detection of superfrequency detection method is that GIS part is put
The electromagnetic wave produced when electric, although its antijamming capability is stronger, but its detecting system detection for high band electromagnetic wave (detection frequency
Section is 0.3GHz-3GHz), and the electromagnetic wave that GIS is produced includes low-frequency range and high band, therefore the low of GIS generations can not be covered
Frequency range electromagnetic wave, so that whole electromagnetic wave frequency range can not be covered, and then its detecting system can not complete effectively adopting to electromagnetic wave
Collection, therefore can not accurately detect by this method GIS Characteristics of Partial Discharge.
The content of the invention
It is an object of the invention to provide a kind of detecting system and method for GIS partial discharge characteristic, for accurately detecting
GIS partial discharge characteristic.
To achieve these goals, the present invention provides a kind of detecting system of GIS partial discharge characteristic, using following technology
Scheme：
The detecting system of the GIS partial discharge characteristic includes：GIS insulation defects analogue means parallel with one another, alternating current
Potential source and direct voltage source, and the partial-discharge measuring device used cooperatively with the GIS insulation defects analogue means；Its
In,
The GIS insulation defects analogue means is used for gradually the different insulative defect of Simulated GlS, when the direct voltage source
When being powered with the alternating-current voltage source for the GIS insulation defects analogue means simultaneously, the GIS insulation defects analogue means root
According to its GIS gradually simulated different insulative defect, the different local discharge signal of corresponding generation；
The partial-discharge measuring device is handled the local discharge signal, generates GIS different insulative defect
Each self-corresponding partial discharge pulse's waveform.
Compared with prior art, the detecting system for the GIS partial discharge characteristic that the present invention is provided has the advantages that：
In the detecting system for the GIS partial discharge characteristic that the present invention is provided, not only lack including GIS insulation parallel with one another
Analogue means, alternating-current voltage source and direct voltage source are fallen into, in addition to the part used cooperatively with GIS insulation defect analogue means is put
Electrical measurement, this is allowed for during GIS partial discharge characteristic is detected, it becomes possible to utilize GIS insulation defects simulation
The different insulative defect of device gradually Simulated GlS, then by alternating-current voltage source and direct voltage source, in the GIS insulation defects
It is superimposed on analogue means after application DC voltage and alternating voltage, you can pass through partial-discharge measuring device and handle GIS insulation
The different insulative defect for the GIS that defects simulation device is gradually simulated, the different local discharge signal of corresponding generation, so that raw
Into GIS each self-corresponding partial discharge pulse's waveform of different insulative defect, technical staff just can be according to GIS different insulative
Each self-corresponding partial discharge pulse's waveform of defect carries out comprehensive analysis, obtains parts of the GIS when occurring different insulative defect
Flash-over characteristic, so can according to GIS occur different insulative defect when Characteristics of Partial Discharge, accurately detect whole GIS's
Characteristics of Partial Discharge.
The present invention also provides a kind of detection method of GIS partial discharge characteristic, adopts the following technical scheme that：
The detection method of the GIS partial discharge characteristic detected using the detecting system of above-mentioned GIS partial discharge characteristic,
The detection method of the GIS partial discharge characteristic includes：
Utilize the insulation defect of GIS insulation defect analogue means Simulated GlSs；
DC voltage and alternating voltage are applied to the GIS insulation defects analogue means, the office of GIS insulation defect is obtained
Portion's discharge signal；
According to the local discharge signal of the insulation defect of the GIS, GIS Characteristics of Partial Discharge is obtained.
Compared with prior art, the beneficial effect for the detection method of GIS partial discharge characteristic that the present invention is provided with it is above-mentioned
The beneficial effect of the detecting system of GIS partial discharge characteristic is identical, therefore here is omitted.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, this hair
Bright schematic description and description is used to explain the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of the structure of the detecting system of GIS partial discharge characteristic provided in an embodiment of the present invention；
Fig. 2 is the flow chart of the detection method of GIS partial discharge characteristic provided in an embodiment of the present invention.
Reference：
1-GIS insulation defect analogue means, 2-alternating-current voltage source,
3-direct voltage source, 4-partial-discharge measuring device,
5-alternating voltage electrical source protecting equipment, 51-alternating-current voltage source protective resistance,
52-alternating voltage source protection electric capacity, 6-DC voltage electrical source protecting equipment,
7-ac voltage measurement device, 8-DC voltage measuring device,
9-exchange superposition DC voltage measuring device.
Embodiment
For ease of understanding, with reference to Figure of description, technical scheme provided in an embodiment of the present invention is retouched in detail
State.
As shown in figure 1, the embodiment of the present invention provides a kind of detecting system of GIS partial discharge characteristic, the system includes：Phase
Mutually GIS insulation defects analogue means 1, alternating-current voltage source 2 and direct voltage source 3 in parallel, and dress is simulated with GIS insulation defects
Put 1 partial-discharge measuring device 4 used cooperatively.Wherein, GIS insulation defects analogue means 1 is used for gradually the difference of Simulated GlS
Insulation defect, when direct voltage source 2 and alternating-current voltage source 3 while when being powered for GIS insulation defect analogue means, GIS insulation lacks
Analogue means is fallen into according to its GIS gradually simulated different insulative defect, the different local discharge signal of corresponding generation；It is local
The local discharge signal of 4 pairs of generations of discharge measuring device is handled, and generates GIS each self-corresponding part of different insulative defect
Discharge pulse waveform.
Exemplarily, can when detecting GIS partial discharge characteristic using the detecting system of above-mentioned GIS partial discharge characteristic
First with the different insulative defect of the gradually Simulated GlS of GIS insulation defects analogue means 1, then pass through alternating-current voltage source 2 and direct current
Voltage source 3, after applying DC voltage and alternating voltage on the GIS insulation defects analogue means 1, you can pass through shelf depreciation
The different insulative defect for the GIS that the processing GIS insulation defects of measurement apparatus 4 analogue means 1 is gradually simulated, correspondence generation different insulative
Local discharge signal under defect, GIS different insulative defect is generated further according to the local discharge signal under different insulative defect
Each self-corresponding partial discharge pulse's waveform, now, technical staff just can be each self-corresponding according to GIS different insulative defect
Partial discharge pulse's waveform carries out comprehensive analysis, obtains Characteristics of Partial Discharge of the GIS when occurring different insulative defect, Jin Erke
According to Characteristics of Partial Discharge of the GIS when occurring different insulative defect, whole GIS Characteristics of Partial Discharge is accurately detected.
In the detecting system for the GIS partial discharge characteristic that the present invention is provided, not only lack including GIS insulation parallel with one another
Fall into analogue means 1, alternating-current voltage source 2 and direct voltage source 3, in addition to the office used cooperatively with GIS insulation defects analogue means 1
Portion's discharge measuring device 4, this is allowed for during GIS partial discharge characteristic is detected, it becomes possible to utilize the GIS insulation defects
The different insulative defect of the gradually Simulated GlS of analogue means 1, it is exhausted in the GIS then by alternating-current voltage source 2 and direct voltage source 3
It is superimposed on edge defects simulation device 1 after application DC voltage and alternating voltage, you can handled by partial-discharge measuring device 4
The different insulative defect for the GIS that GIS insulation defects analogue means 1 is gradually simulated, the different shelf depreciation letter of corresponding generation
Number, so that each self-corresponding partial discharge pulse's waveform of the different insulative defect for generating GIS, technical staff just can be according to GIS
Each self-corresponding partial discharge pulse's waveform of different insulative defect carry out comprehensive analysis, obtain GIS and lack occurring different insulative
Fall into when Characteristics of Partial Discharge, and then can according to GIS occur different insulative defect when Characteristics of Partial Discharge, accurately detect
Whole GIS Characteristics of Partial Discharge.
It should be noted that each self-corresponding partial discharge pulse's waveform progress of different insulative defect to above-mentioned GIS is comprehensive
Analysis is closed, the common knowledge that Characteristics of Partial Discharge of the GIS when occurring different insulative defect is those skilled in the art is obtained, therefore
No longer it is described in detail herein.
Exemplarily, as shown in figure 1, in the alternating current circuit of connection alternating-current voltage source 2 and GIS insulation defects analogue means 1
L1On, it is settable to have alternating voltage electrical source protecting equipment 5, so as to limit when GIS insulation defects analogue means 1 discharges
Short circuit current flow, and prevent alternating-current voltage source 2 from being damaged by the influence of direct voltage source 3, extend the use longevity of alternating-current voltage source 2
Life.
Further, as shown in figure 1, alternating voltage electrical source protecting equipment 5 may include to be arranged in series in alternating current circuit L1On
Alternating-current voltage source protective resistance 51 and alternating voltage source protection electric capacity 52, wherein, alternating-current voltage source protective resistance 51 is used to limit
Short circuit current flow when GIS insulation defects analogue means 1 discharges, protects alternating-current voltage source 2, alternating voltage source protection electric capacity 52
For preventing alternating-current voltage source 2 from being damaged by the influence of direct voltage source 3, alternating-current voltage source 2 is further protected.
Similarly, as shown in figure 1, in the DC line L of connection direct voltage source 3 and GIS insulation defects analogue means 12
On, it is settable to have DC voltage electrical source protecting equipment 6, so as to prevent direct voltage source 3 by the influence of alternating-current voltage source 2
Damage, extend the service life of direct voltage source 3.
Further, as shown in figure 1, DC voltage electrical source protecting equipment 6 may include direct voltage source protective resistance, so as to
To play partial pressure effect, damaged with protecting direct voltage source 3 not influenceed by alternating-current voltage source 2.
Alternatively, as shown in figure 1, the detecting system of above-mentioned GIS partial discharge characteristic may also include：With alternating-current voltage source 2
The in parallel ac voltage measurement device 7 in two ends, the DC voltage measuring device 8 in parallel with the two ends of direct voltage source 3, with
In detection process, the voltage of alternating-current voltage source 2 and direct voltage source 3 is measured in real time.Exemplarily, the two ends of alternating-current voltage source are simultaneously
The ac voltage measurement dress of connection can be capacitive divider, and the two ends of direct voltage source DC voltage measuring device in parallel can be with
For resitstance voltage divider.
In addition, as shown in figure 1, the detecting system of above-mentioned GIS partial discharge characteristic may also include：With GIS insulation defect moulds
Intend the two ends of device 1 exchange superposition DC voltage measuring device 9 in parallel.Exemplarily, exchange superposition DC voltage measurement
Device can be the RC divider for being connected in parallel on GIS insulation defect analogue means two ends.
You need to add is that, as shown in figure 1, above-mentioned alternating-current voltage source 2, direct voltage source 3 and GIS insulation defects simulation dress
The circuit ground of 1 composition is put, it is special to whole GIS partial discharge during the generation shelf depreciation of GIS insulation defects analogue means 1 to prevent
The detecting system of property causes damage.
In addition, as shown in Fig. 2 the embodiment of the present invention provides a kind of detection method of GIS partial discharge characteristic, using above-mentioned
The detecting system of GIS partial discharge characteristic is detected that the detection method of the GIS partial discharge characteristic includes：
Step S1, the insulation defect using GIS insulation defect analogue means Simulated GlSs.
Exemplarily, using the different insulative defect of GIS insulation defects analogue means gradually Simulated GlS.
Step S2, DC voltage and alternating voltage are applied to GIS insulation defects analogue means, obtain GIS insulation defect
Local discharge signal.
Step S3, the local discharge signal according to GIS insulation defect, obtain GIS Characteristics of Partial Discharge.
The beneficial effect and above-mentioned GIS partial discharge that can be reached using the detection method of above-mentioned GIS partial discharge characteristic
The beneficial effect of the detection of characteristic is identical, therefore is no longer repeated herein.
Exemplarily, GIS local discharge signal may include the first local discharge signal, the second local discharge signal,
Three local discharge signals and the 4th local discharge signal, wherein, the first local discharge signal is in GIS insulation defect analogue means
The upper DC voltage for applying certain amplitude, after the time span of change, applies the certain voltage amplitude of certain time length
Alternating voltage in the case of, acquisition exchange superposition DC voltage under GIS local discharge signal, the second local discharge signal
It is the positive polarity DC voltage for applying voltage magnitude change on GIS insulation defect analogue means, by regular hour length
Afterwards, in the case of the alternating voltage of certain voltage amplitude for applying certain time length, under the exchange superposition DC voltage of acquisition
GIS local discharge signal, the 3rd local discharge signal is to apply voltage magnitude change on GIS insulation defect analogue means
Negative polarity d. c voltage, after regular hour length, applies the alternating voltage of the certain voltage amplitude of certain time length
In the case of, GIS local discharge signal under the exchange superposition DC voltage of acquisition, the 4th local discharge signal is exhausted in GIS
The DC voltage of certain amplitude on edge defects simulation device, after regular hour length, applies the electricity of certain time length
In the case of the alternating voltage of pressure amplitude value changes, GIS local discharge signal under the exchange superposition DC voltage of acquisition.
Now, above-mentioned steps S2 and step S3 specifically may include following steps：
It is U to apply voltage magnitude to GIS insulation defects analogue means1DC voltage, passing through TiAfter time span, apply
Plus the voltage magnitude of t time spans is U2Alternating voltage, disconnect be applied to GIS insulation defect analogue means DC voltage and
Alternating voltage, obtains GIS i-th of first local discharge signals, wherein, U1It is constant, T with tiFor variable, i=1,2 ...,
N, n are the integer more than or equal to 2, are U to the voltage magnitude that GIS insulation defects analogue means applies1DC voltage for just
Polarity DC voltage or negative polarity d. c voltage.
According to n the first local discharge signals, GIS the first local Discharge pulse waveform is obtained.
According to the first local Discharge pulse waveform, GIS the first Characteristics of Partial Discharge is obtained, the first part of the GIS is put
Electrical characteristics are affecting laws of the pre-add time to GIS partial discharge characteristic under exchange superposition DC voltage of DC voltage.
It is U to apply voltage magnitude to GIS insulation defects analogue means1jPositive polarity DC voltage, pass through T time length
Afterwards, the voltage magnitude for applying t time spans is U2Alternating voltage, disconnect and be applied to the direct current of GIS insulation defect analogue means
Voltage and alternating voltage, obtain GIS j-th of second local discharge signals, wherein T and U2It is constant, U1jFor variable, j=
1,2 ..., m, m are the integer more than or equal to 2.
According to m the second local discharge signals, GIS the second local Discharge pulse waveform is obtained.
According to the second local Discharge pulse waveform, GIS the second Characteristics of Partial Discharge is obtained.
It is U to apply voltage magnitude to the GIS insulation defects analogue means1jNegative polarity d. c voltage, passing through T time
After length, the voltage magnitude for applying t time spans is U2Alternating voltage, disconnection be applied to GIS insulation defect analogue means
DC voltage and alternating voltage, obtain GIS j-th of the 3rd local discharge signals.
According to m the 3rd local discharge signals, GIS the 3rd partial discharge pulse's waveform is obtained.
According to the 3rd partial discharge pulse's waveform, GIS the 3rd Characteristics of Partial Discharge is obtained.
Exemplarily, it can be obtained with reference to above-mentioned GIS the second Characteristics of Partial Discharge and GIS the 3rd Characteristics of Partial Discharge
DC voltage amplitude is superimposed the affecting laws of GIS partial discharge characteristic under DC voltage with polarity to exchanging.
It is U to apply voltage magnitude to GIS insulation defects analogue means1DC voltage, after T time length, apply
Plus the voltage magnitude of t time spans is U2kAlternating voltage, disconnect be applied to GIS insulation defect analogue means DC voltage and
Alternating voltage, obtains GIS k-th of the 4th local discharge signals, wherein, U2kFor variable, k=1,2 ..., p, p is to be more than or wait
In 2 integer.
According to p the 4th local discharge signals, GIS the 4th partial discharge pulse's waveform is obtained.
According to the 4th partial discharge pulse's waveform, GIS the 4th Characteristics of Partial Discharge is obtained, the 4th part of the GIS is put
Electrical characteristics are affecting laws of the alternating voltage amplitude to GIS partial discharge characteristic under exchange superposition DC voltage.
According to the first Characteristics of Partial Discharge, the second Characteristics of Partial Discharge, the 3rd Characteristics of Partial Discharge and the 4th shelf depreciation
Characteristic, analysis contrast obtains GIS Characteristics of Partial Discharge.
It should be noted that being put for obtaining above-mentioned first Characteristics of Partial Discharge, the second Characteristics of Partial Discharge, the 3rd part
The sequencing of electrical characteristics and the 4th Characteristics of Partial Discharge, the embodiment of the present invention is without limiting, and those skilled in the art can root
Selected according to actual conditions.
In order to which those skilled in the art are better understood from and the detecting system for implementing above-mentioned GIS partial discharge characteristic and side
Method, below the embodiment of the present invention by the detecting system for providing above-mentioned GIS partial discharge characteristic and the applicating example of method：
As shown in figure 1, the detecting system of GIS partial discharge characteristic includes GIS insulation defect analogue means parallel with one another
1st, alternating-current voltage source 2 and direct voltage source 3, used cooperatively with GIS insulation defects analogue means 1 partial-discharge measuring device 4,
Alternating voltage electrical source protecting equipment 5, DC voltage electrical source protecting equipment 6, ac voltage measurement device 7, the and of DC voltage measuring device 8
Exchange superposition DC voltage measuring device 9.
Wherein, GIS insulation defects analogue means 1 is the GIS that voltage class is 500kV；The voltage of alternating-current voltage source 2 it is defeated
Go out scope for 0kV~500kV, the output area of the voltage of direct voltage source 3 is 0kV~600kV；Alternating voltage electrical source protecting equipment
The resistance of alternating-current voltage source protective resistance 51 in 5 is that the alternating-current voltage source in 5k Ω, alternating voltage electrical source protecting equipment 5 is protected
Shield electric capacity 52 is capacitance, and the capacitance of capacitance is 30nF；The DC voltage source protection of DC voltage electrical source protecting equipment 6
The resistance of resistance 61 is 10k Ω.
Use comprising the following steps that the detecting system of above-mentioned GIS partial discharge characteristic is detected：
First, using any insulation defect of GIS insulation defect analogue means Simulated GlSs, for example, high-pressure conductor spine,
Housing spine, floating potential, free conducting particle, disc insulator attachment foreign matter etc..
Secondly, to GIS pre-add DC voltages, by Ti(make TiRespectively equal to 1min, 10min, 30min, 60min) after,
Apply alternating voltage, by certain time, simultaneously switch off the DC voltage and alternating voltage being applied on GIS, obtain four friendships
GIS the first local discharge signal, the first game of GIS under DC voltage is superimposed according to this 4 exchanges under stream superposition DC voltage
Portion's discharge signal, obtains GIS the first local Discharge pulse waveform, and according to GIS the first local Discharge pulse waveform, obtain
Affecting laws of the DC voltage pre-add time to GIS partial discharge characteristic under exchange superposition DC voltage.
Then, it is U to apply voltage magnitude to GIS insulation defects analogue means1j(make U1jRespectively equal to 100kV, 200kV,
300kV, 400kV) positive polarity DC voltage, by certain time, apply alternating voltage, obtain 4 exchange superposition direct currents
The GIS of pressure the second local discharge signal, according to 4 the second local discharge signals, obtains GIS the second partial discharge pulse
Waveform, according to the second local Discharge pulse waveform, you can obtain GIS the second Characteristics of Partial Discharge；To GIS insulation defect moulds
It is U to intend device and apply voltage magnitude1j(make U1jRespectively equal to 100kV, 200kV, 300kV, 400kV) negative polarity d. c voltage,
By certain time, apply alternating voltage, obtain the 3rd local discharge signal of the GIS under 4 exchange superposition DC voltages, root
According to 4 the 3rd local discharge signals, GIS the 3rd partial discharge pulse's waveform is obtained, according to the 3rd partial discharge pulse's ripple
Shape, you can obtain GIS the 3rd Characteristics of Partial Discharge；It is local according to the 3rd of above-mentioned GIS the second Characteristics of Partial Discharge and GIS the
Flash-over characteristic can obtain DC voltage amplitude and the influence for exchanging GIS partial discharge characteristic under superposition DC voltage is advised with polarity
Rule.
Then, the DC voltage of certain voltage amplitude is applied to GIS insulation defect analogue means, is passing through certain time
Afterwards, the voltage magnitude for applying certain time is U2k(make U2kEqual to 100kV, 200kV, 300kV, 400kV) alternating voltage, obtain
The 4th local discharge signal of the GIS under 4 exchange superposition DC voltages is obtained, the GIS under DC voltages are superimposed according to 4 exchanges
The 4th local discharge signal, obtain GIS the 4th partial discharge pulse's waveform, according to the 4th partial discharge pulse's waveform, obtain
Obtain affecting laws of the alternating voltage amplitude to GIS partial discharge characteristic under exchange superposition DC voltage.
Finally, it is special to GIS partial discharge under exchange superposition DC voltage according to the DC voltage pre-add time of above-mentioned acquisition
Property affecting laws, DC voltage amplitude and polarity to exchanging the affecting laws of GIS partial discharge characteristic under superposition DC voltage,
And alternating voltage amplitude is to the affecting laws of GIS partial discharge characteristic under exchange superposition DC voltage, you can analysis contrast is obtained
Obtain GIS Characteristics of Partial Discharge.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all be contained
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of detecting system of GIS partial discharge characteristic, it is characterised in that including：GIS insulation defects simulation parallel with one another
Device, alternating-current voltage source and direct voltage source, and the shelf depreciation used cooperatively with the GIS insulation defects analogue means are surveyed
Measure device；Wherein,
The GIS insulation defects analogue means is used for gradually the different insulative defect of Simulated GlS, when the direct voltage source and institute
Alternating-current voltage source is stated while when being powered for the GIS insulation defects analogue means, the GIS insulation defects analogue means is according to it
The GIS gradually simulated different insulative defect, the different local discharge signal of corresponding generation；
The partial-discharge measuring device is handled the local discharge signal, generates GIS different insulative defect each
Corresponding partial discharge pulse's waveform.
2. the detecting system of GIS partial discharge characteristic according to claim 1, it is characterised in that connecting the exchange
Voltage source is with the alternating current circuit of the GIS insulation defects analogue means, being provided with alternating voltage electrical source protecting equipment.
3. the detecting system of GIS partial discharge characteristic according to claim 2, it is characterised in that the alternating-current voltage source
Protection device includes the alternating-current voltage source protective resistance and alternating voltage source protection electric capacity being arranged in series on the alternating current circuit.
4. the detecting system of GIS partial discharge characteristic according to claim 1, it is characterised in that connecting the direct current
Voltage source is with the DC line of the GIS insulation defects analogue means, being provided with DC voltage electrical source protecting equipment.
5. the detecting system of GIS partial discharge characteristic according to claim 4, it is characterised in that the direct voltage source
Protection device includes direct voltage source protective resistance.
6. the detecting system of GIS partial discharge characteristic according to claim 1, it is characterised in that the GIS partial discharge
The detecting system of characteristic also includes：The ac voltage measurement device in parallel with the two ends of the alternating-current voltage source, with the direct current
The two ends of voltage source DC voltage measuring device in parallel.
7. the detecting system of the GIS partial discharge characteristic according to claim 1 or 6, it is characterised in that the GIS is local
The detecting system of flash-over characteristic also includes：Direct current is superimposed with parallel the exchanging in the two ends of the GIS insulation defects analogue means
Pressure measuring device.
8. the detecting system of GIS partial discharge characteristic according to claim 1, it is characterised in that the alternating-current voltage source,
The circuit ground that the direct voltage source and the GIS insulation defects analogue means are constituted.
9. a kind of detection method of GIS partial discharge characteristic, it is characterised in that using as described in any one of claim 1~8
The detecting system of GIS partial discharge characteristic is detected that the detection method of the GIS partial discharge characteristic includes：
Utilize the insulation defect of GIS insulation defect analogue means Simulated GlSs；
DC voltage and alternating voltage are applied to the GIS insulation defects analogue means, the part for obtaining GIS insulation defect is put
Electric signal；
According to the local discharge signal of the insulation defect of the GIS, GIS Characteristics of Partial Discharge is obtained.
10. the detection method of GIS partial discharge characteristic according to claim 9, it is characterised in that the part of the GIS
Discharge signal includes the first local discharge signal, the second local discharge signal, the 3rd local discharge signal and the 4th shelf depreciation
Signal；
DC voltage and alternating voltage are applied to the GIS insulation defects analogue means, the part for obtaining GIS insulation defect is put
Electric signal, includes according to the local discharge signal of the insulation defect of the GIS, the step of the Characteristics of Partial Discharge for obtaining GIS：
It is U to apply voltage magnitude to the GIS insulation defects analogue means1DC voltage, passing through TiAfter time span, apply
Plus the voltage magnitude of t time spans is U2Alternating voltage, disconnect and be applied to the direct current of the GIS insulation defects analogue means
Pressure and alternating voltage, obtain i-th of first local discharge signals of the GIS, wherein, U1It is constant, T with tiFor variable, i
=1,2 ..., n, n are the integer more than or equal to 2, are U to the voltage magnitude that the GIS insulation defects analogue means applies1's
DC voltage is positive polarity DC voltage or negative polarity d. c voltage；
According to n first local discharge signals, the first local Discharge pulse waveform of the GIS is obtained；
According to the described first local Discharge pulse waveform, the first Characteristics of Partial Discharge of the GIS is obtained；
It is U to apply voltage magnitude to the GIS insulation defects analogue means1jPositive polarity DC voltage, pass through T time length
Afterwards, the voltage magnitude for applying t time spans is U2Alternating voltage, disconnection be applied to the GIS insulation defects analogue means
DC voltage and alternating voltage, obtain j-th of second local discharge signals of the GIS, wherein T and U2It is constant, U1jFor
Variable, j=1,2 ..., m, m is the integer more than or equal to 2；
According to m second local discharge signals, the second local Discharge pulse waveform of the GIS is obtained；
According to the described second local Discharge pulse waveform, the second Characteristics of Partial Discharge of the GIS is obtained；
It is U to apply voltage magnitude to the GIS insulation defects analogue means1jNegative polarity d. c voltage, pass through T time length
Afterwards, the voltage magnitude for applying t time spans is U2Alternating voltage, disconnection be applied to the GIS insulation defects analogue means
DC voltage and alternating voltage, obtain j-th of the 3rd local discharge signals of the GIS；
According to m the 3rd local discharge signals, the 3rd partial discharge pulse's waveform of the GIS is obtained；
According to the 3rd partial discharge pulse's waveform, the 3rd Characteristics of Partial Discharge of the GIS is obtained；
It is U to apply voltage magnitude to the GIS insulation defects analogue means1DC voltage, after T time length, apply
The voltage magnitude of t time spans is U2kAlternating voltage, disconnect and be applied to the DC voltage of the GIS insulation defects analogue means
And alternating voltage, k-th of the 4th local discharge signals of the GIS are obtained, wherein, U2kFor variable, k=1,2 ...,p, p is big
In or equal to 2 integer；
According to p the 4th local discharge signals, the 4th partial discharge pulse's waveform of the GIS is obtained；
According to the 4th partial discharge pulse's waveform, the 4th Characteristics of Partial Discharge of the GIS is obtained；
According to first Characteristics of Partial Discharge, second Characteristics of Partial Discharge, the 3rd Characteristics of Partial Discharge and described
4th Characteristics of Partial Discharge, analysis contrast obtains the Characteristics of Partial Discharge of the GIS.
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