CN110361637A - A kind of simulation experiment platform and method for studying cable terminal discharge Acoustic Emission Characteristic - Google Patents
A kind of simulation experiment platform and method for studying cable terminal discharge Acoustic Emission Characteristic Download PDFInfo
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- CN110361637A CN110361637A CN201910659040.XA CN201910659040A CN110361637A CN 110361637 A CN110361637 A CN 110361637A CN 201910659040 A CN201910659040 A CN 201910659040A CN 110361637 A CN110361637 A CN 110361637A
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- acoustic emission
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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
- G01R31/1209—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 acoustic measurements
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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
- G01R31/1272—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 cable, line or wire insulation, e.g. using partial discharge measurements
Abstract
The invention discloses a kind of simulation experiment platforms and method for studying cable terminal discharge Acoustic Emission Characteristic, corresponding simulation electrode is made in conjunction with the four kinds of typical defects occurred in cable termination operational process, including point discharge, creeping discharge, bubble-discharge and suspended discharge, build experimental system, test voltage is increased using the ladder boosting method of 1kV step-length, acoustic emission waveform of the every kind of defect electrode of oscillograph recording from 2kV to 12kV under voltage, capture card acquires electric discharge acoustic emission signal in real time and is uploaded to host computer simultaneously, electric discharge acoustic emission signal is handled, obtain corresponding acoustic emission parameters and discharge parameter, then it draws two dimension or three-dimensional parameter is associated with map.The present invention effectively simulates cable termination difference defect discharge condition, and can real-time measurement electric discharge acoustic emission signal, discharge parameter and electric discharge type identification, to probe into based on acoustic emission detection cable terminal shelf depreciation and identifying that the theoretical basis of electric discharge type provides experimental method.
Description
Technical field
The present invention relates to insulating materials state inspection field, specially a kind of research cable terminal discharge sound emission is special
The simulation experiment platform and method of property.
Background technique
Cable termination is the important component of cable run, the functions such as collection insulation, electric field stress control, shielding and waterproof
In one, internal structure is complicated, thus operation troubles is multiple.In cable termination manufacturing process, conductor burr due to various reasons
Problem can not thoroughly prevent, and there are will lead to point discharge when the terminal operating of burr；The dislocation of cable termination internal stress pipe and layer
Between air gap will lead to creeping discharge；Micro-bubble or tool marks in insulating layer make cable termination occur air gap in the process of running
Electric discharge；Conductive and semiconductive impurity is attached to major insulation surface and will lead to suspended discharge.
Traditional cable terminal discharge detection method has poor anti jamming capability, different electric discharge type discriminations are low to lack
Point, acoustic-emission carries out detection and type identification to electric discharge using the acoustic emission signal generated in discharge process, because it is with non-
Intrusion.The features such as strong antijamming capability, is widely studied, but does not have the analysis method of related maturation at present.
Summary of the invention
In view of the above-mentioned problems, the purpose of the present invention is to provide a kind of cable termination different type defect shelf depreciation sound hairs
The experiment porch and method for penetrating detection, can probe into the difference of different type electric discharge acoustic emission signal, and be based on acoustical signal difference
Realize electric discharge type identification:
A kind of simulation experiment platform for studying cable terminal discharge Acoustic Emission Characteristic, including pressure regulator, transformer, current limliting electricity
Hinder device, voltage-dividing capacitor and Sample devices；The input terminal of pressure regulator is connected to AC power source, and output end is connected to the low of transformer
Press input terminal；The high-voltage output end of transformer is connected to the side of voltage-dividing capacitor by current-limiting resistor；Voltage-dividing capacitor
The other side is connected to the voltage equalizing ball of electric discharge Sample devices by high-voltage line；The electric discharge Sample devices include being fixed on insulating support
On EP rubbers sample, EP rubbers sample upper surface is fixed with high electrode, and lower surface is fixed with ground electrode；Voltage equalizing ball is fixed
In high electrode top；Acoustic emission sensor is fixed on ground electrode；The acoustic emission sensor pass sequentially through amplifilter and
Collected acoustic emission signal is uploaded to computer by capture card.
Further, the simulation experiment platform of the research cable terminal discharge Acoustic Emission Characteristic according to claim,
It is characterized in that, the high electrode is point electrode, along face electrode, Air-gap electrode or suspension electrode, the EP rubbers sample
It is corresponding to interview sample, air gap sample or suspension sample for tip sample, edge.
Further, it is 5 μm that the point electrode, which is radius of curvature, the stainless steel electrode that 30 ° of point angle, the air gap
Electrode epoxy resin sealing, the air gap of the 1mm containing diameter inside the air gap sample are placed on the suspension sample conductive micro-
Grain.
Further, the voltage equalizing ball is fixed by copper nut and high electrode, and the acoustic emission sensor passes through fixation
Magnetic support is fixed with ground electrode.
It further, further include the voltage display and storage oscillograph for being connected to voltage-dividing capacitor output end, storage
Oscillograph is also connected to the output end of amplifilter.
Further, the acoustic emission sensor turns bnc interface copper core by SAM interface and amplifilter connects
It connects.
Further, the pressure regulator, transformer, voltage-dividing capacitor connect and single with the ground line of electric discharge Sample devices
Point ground connection.
A kind of analogue experiment method for studying cable terminal discharge Acoustic Emission Characteristic, comprising the following steps:
S1, the test platform is built, the point discharge Sample devices to point electrode and tip sample is installed；
S2, test voltage is increased with the ladder boosting method of 1kV step-length, records the discharging sound hair under 2kV-12kV test voltage
Penetrate signal；
S3, it successively replaces along face, air gap, suspended discharge Sample devices, and repeats S2 respectively；
S4, all types of electric discharge acoustic emission signals of analysis, compare acoustic emission waveform difference, calculate each sound emission signal characteristic ginseng
Number；
S5, FEATURE PARAMETERS OF ACOUSTIC EMISSION association map is drawn, map is utilized to distinguish electric discharge type.
The beneficial effects of the present invention are: the present invention has the characteristics that low local noise, when being tested, easily replace
Discharging model, measuring instrument are separated with autoclave appts, are had a safety feature, full-automatic storage electric discharge acoustic emission signal；It measures
Acoustie emission event group is plotted on parameter association map in the form of scatter plot, and different type electric discharge is distributed in different zones, can
Electric discharge type is quickly and accurately differentiated using the characteristic.
Detailed description of the invention
Fig. 1 is the experiment porch figure of cable termination different type defect shelf depreciation acoustic emission detection.
Fig. 2 is electric discharge Sample devices structural schematic diagram.
Tetra- kinds of high electrode structural schematic diagrams of Fig. 3.
Tetra- kinds of style structural schematic diagrams of Fig. 4.
Fig. 5 is that four seed types electric discharge sound emission characteristic parameter 3D is associated with map.
In figure: 1- AC power source；2- pressure regulator；3- transformer；4- current-limiting resistor；5- voltage-dividing capacitor；6- voltage is aobvious
Show device；7- electric discharge Sample devices；8- acoustic emission sensor；9- amplifilter；10 storage oscilloscopes；11- capture card；12- meter
Calculation machine；13- voltage equalizing ball；14- copper nut；15- high electrode；16；EP rubbers sample；17- ground electrode；18- insulating support；19-
Fixed magnetic support.
Specific embodiment
The present invention is described in further details in the following with reference to the drawings and specific embodiments.As shown in Figure 1, of the invention grinds
Study carefully the simulation experiment platform of cable terminal discharge Acoustic Emission Characteristic, including pressure regulator 2, transformer 3, current-limiting resistor 4, partial pressure electricity
Container 5 and Sample devices 7；The input terminal of pressure regulator 2 is connected to AC power source 1, and output end is connected to the low pressure input of transformer 3
End；The high-voltage output end of transformer 3 is connected to the side of voltage-dividing capacitor 5 by current-limiting resistor 4；Voltage-dividing capacitor 5 it is another
Side is connected to the voltage equalizing ball 13 of electric discharge Sample devices 7 by high-voltage line.
As shown in Fig. 2, the electric discharge Sample devices 7 include the EP rubbers sample 16 being fixed on insulating support 18, second
Third rubber sample, 16 upper surface is fixed with high electrode 15, and lower surface is fixed with ground electrode 17；Voltage equalizing ball 13 is fixed on high electrode 15
Top；Acoustic emission sensor 8 is fixed on ground electrode 17；The voltage equalizing ball 13 is fixed by copper nut 14 and high electrode 15, institute
It is fixed by fixed magnetic support and ground electrode 17 to state acoustic emission sensor 8.
The acoustic emission sensor 8 passes sequentially through amplifilter 9 and capture card 11 will be in collected acoustic emission signal
Reach computer 12.And acoustic emission sensor 8 turns bnc interface copper core by SAM interface and connect with amplifilter 9.Also wrap
The voltage display 6 and storage oscillograph 10 for being connected to 5 output end of voltage-dividing capacitor are included, storage oscillograph 10 is also connected to amplification
The output end of filter 9.
As shown in figure 3, it is point electrode 15a, along face electrode 15b, Air-gap electrode 15c or outstanding that high electrode 15 is detachable and interchangeable
Floating electrode 15d.As shown in figure 4, the EP rubbers sample 16 is corresponding detachable and interchangeable for tip sample 16a, edge interview sample
16b, air gap sample 16c or suspension sample 16d.It can satisfy the detection of different type defect shelf depreciation sound emission.This implementation
In example, ground electrode uses the copper electrode of diameter 90mm, thickness 8mm.Point electrode uses radius of curvature for 5 μm, 30 ° of point angle
Stainless steel electrode；Diameter 30mm, the disc electrode of thickness 8mm are used along face, suspension electrode；It is put in suspension electrode and rubber test product
Enter electrically conductive particles；Air-gap electrode uses epoxy resin sealing, the air gap of the 1mm containing diameter in rubber test product.
Based on above-mentioned experiment porch, the analogue experiment method of present invention research cable terminal discharge Acoustic Emission Characteristic, including
Following steps:
S1, the test platform is built, the point discharge Sample devices to point electrode and tip sample is installed；
S2, test voltage is increased with the ladder boosting method of 1kV step-length, records the discharging sound hair under 2kV-12kV test voltage
Penetrate signal；
S3, it successively replaces along face, air gap, suspended discharge Sample devices, and repeats S2 respectively；
S4, all types of electric discharge acoustic emission signals of analysis, compare acoustic emission waveform difference, calculate each sound emission signal characteristic ginseng
Number, including rise time, duration, amplitude and energy；
S5, FEATURE PARAMETERS OF ACOUSTIC EMISSION association map is drawn, map is utilized to distinguish electric discharge type.
Fig. 5 is that four seed types electric discharge sound emission characteristic parameter 3D is associated with map, and FEATURE PARAMETERS OF ACOUSTIC EMISSION includes rising
Time, duration, amplitude and energy etc., the parameter association map are depicted as two by two or three characteristics of Acoustic Emission parameters
Dimension or three-dimensional association map.Each scatterplot indicates an acoustie emission event, different type under same voltage in parameter association map
For the acoustie emission event group of electric discharge with the distribution of scatterplot cluster in map, the sound emission scatterplot cluster of four kinds of electric discharge types is distributed in not same district
Domain can distinguish different electric discharge types.
Claims (8)
1. it is a kind of study cable terminal discharge Acoustic Emission Characteristic simulation experiment platform, which is characterized in that including pressure regulator (2),
Transformer (3), current-limiting resistor (4), voltage-dividing capacitor (5) and Sample devices (7)；The input terminal of pressure regulator (2) is connected to friendship
Galvanic electricity source (1), output end are connected to the low pressure, input end of transformer (3)；The high-voltage output end of transformer (3) passes through current-limiting resistance
Device (4) is connected to the side of voltage-dividing capacitor (5)；The other side of voltage-dividing capacitor (5) is connected to electric discharge sample by high-voltage line
The voltage equalizing ball (13) of device (7)；Electric discharge Sample devices (7) includes the EP rubbers sample being fixed on insulating support (18)
(16), EP rubbers sample (16) upper surface is fixed with high electrode (15), and lower surface is fixed with ground electrode (17)；Voltage equalizing ball (13)
It is fixed on high electrode (15) top；Acoustic emission sensor (8) is fixed on ground electrode (17)；The acoustic emission sensor (8) according to
It is secondary that collected acoustic emission signal is uploaded to by computer (12) by amplifilter (9) and capture card (11).
2. the simulation experiment platform of research cable terminal discharge Acoustic Emission Characteristic according to claim 1, which is characterized in that
The high electrode (15) is point electrode (15a), along face electrode (15b), Air-gap electrode (15c) or suspension electrode (15d), described
EP rubbers sample (16) is corresponding for tip sample (16a), edge interview sample (16b), air gap sample (16c) or suspension sample
(16d)。
3. the simulation experiment platform of research cable terminal discharge Acoustic Emission Characteristic according to claim 2, which is characterized in that
It is 5 μm that the point electrode (15a), which is radius of curvature, the stainless steel electrode that 30 ° of point angle, and the Air-gap electrode (15c) uses ring
Oxygen resin sealing, the air gap of the internal 1mm containing diameter of the air gap sample (16c) are placed with conduction on the suspension sample (16d)
Particle.
4. the simulation experiment platform of research cable terminal discharge Acoustic Emission Characteristic according to claim 1, which is characterized in that
The voltage equalizing ball (13) is fixed by copper nut (14) and high electrode (15), and the acoustic emission sensor (8) passes through fixed magnetic support
It is fixed with ground electrode (17).
5. the simulation experiment platform of research cable terminal discharge Acoustic Emission Characteristic according to claim 1, which is characterized in that
It further include the voltage display (6) and storage oscillograph (10) for being connected to voltage-dividing capacitor (5) output end, storage oscillograph (10)
It is also connected to the output end of amplifilter (9).
6. the simulation experiment platform of research cable terminal discharge Acoustic Emission Characteristic according to claim 1, which is characterized in that
The acoustic emission sensor (8) turns bnc interface copper core by SAM interface and connect with amplifilter (9).
7. the simulation experiment platform of research cable terminal discharge Acoustic Emission Characteristic according to claim 1, which is characterized in that
The pressure regulator (2), transformer (3), voltage-dividing capacitor (5) is connected with the ground line of electric discharge Sample devices (7) and single-point grounding.
8. a kind of analogue experiment method for studying cable terminal discharge Acoustic Emission Characteristic, which comprises the following steps:
S1, the test platform is built, the point discharge Sample devices to point electrode and tip sample is installed；
S2, test voltage is increased with the ladder boosting method of 1kV step-length, records the electric discharge sound emission letter under 2kV-12kV test voltage
Number；
S3, it successively replaces along face, air gap, suspended discharge Sample devices, and repeats S2 respectively；
S4, all types of electric discharge acoustic emission signals of analysis, compare acoustic emission waveform difference, calculate each FEATURE PARAMETERS OF ACOUSTIC EMISSION,
Including rise time, duration, amplitude and energy；
S5, FEATURE PARAMETERS OF ACOUSTIC EMISSION association map is drawn, map is utilized to distinguish electric discharge type.
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Cited By (2)
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| CN113156288A (en) * | 2021-05-12 | 2021-07-23 | 西南交通大学 | Vehicle-mounted cable terminal partial discharge detection device and method thereof |
| CN113533921A (en) * | 2021-09-15 | 2021-10-22 | 北京普源瑞新仿真科技有限公司 | Partial discharge detection method and partial discharge detection device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113156288A (en) * | 2021-05-12 | 2021-07-23 | 西南交通大学 | Vehicle-mounted cable terminal partial discharge detection device and method thereof |
| CN113156288B (en) * | 2021-05-12 | 2024-04-16 | 西南交通大学 | Vehicle-mounted cable terminal partial discharge detection device and method thereof |
| CN113533921A (en) * | 2021-09-15 | 2021-10-22 | 北京普源瑞新仿真科技有限公司 | Partial discharge detection method and partial discharge detection device |
| CN113533921B (en) * | 2021-09-15 | 2021-12-17 | 北京普源瑞新仿真科技有限公司 | Partial discharge detection method and partial discharge detection device |
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