CN106324454A - XLPE cable insulation detection device and anti-electromagnetic interference method thereof - Google Patents
XLPE cable insulation detection device and anti-electromagnetic interference method thereof Download PDFInfo
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- CN106324454A CN106324454A CN201610679809.0A CN201610679809A CN106324454A CN 106324454 A CN106324454 A CN 106324454A CN 201610679809 A CN201610679809 A CN 201610679809A CN 106324454 A CN106324454 A CN 106324454A
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- xlpe cable
- driving source
- faraday cup
- measurement module
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses an XLPE cable insulation detection device and an anti-electromagnetic interference method thereof. When suspension measurement is performed on an XLPE cable, an XLPE cable is placed in a Faraday cage and an electric field shielding is realized; a lead wounded with a low resistance shielding wire is used as a measurement lead, a magnetic field shielding is realized; and an along-surface leakage interference is realized during a measurement process through a low resistance shielding ring; when an exciting signal source is suspended, the electric field shielding during the measurement process is realized through placing the exciting source in the metal outer cage of the Faraday cage; the lead wound with the low resistance shielding wire is used as the measurement lead and the magnetic field shielding is realized during a measurement process; and the along-surface leakage interference is realized during the measurement process through the low resistance shielding ring. The XLPE cable insulation detection device and the anti-electromagnetic interference method solve a problem that the electric field interference, the magnetic field interference and the along-surface leakage affect the polarization-depolarization current during measurement processes of various connection modes of current XLPE cable polarization-depolarization current and improve the accuracy of the XLPE cable polarization-depolarization current measurement.
Description
Technical field
The invention belongs to crosslinked polyethylene (Cross Linked Polyethylene, XLPE) cable insulation condition diagnosing
Field, arranges more particularly, to a kind of electromagnetism interference measured for different modes XLPE cable polarization-depolarization current
Execute.
Background technology
Relative to traditional oils paper insulated cable, the internal oil-free of XLPE cable and auxiliary device are few, laid processes and operation dimension
Protect simple, there is excellent mechanical performance and electric property, be gradually widely used in urban distribution network system.Therefore, carry out
XLPE cable insulation condition diagnosis, it is ensured that XLPE cable safely and steadily runs for power supply reliability significant.
Owing to XLPE cable lays circumstance complication, During Process of Long-term Operation can be subject to electricity, heat, moisture, machinery, extraneous ring
Border, the impact of the factor such as chemical attack, the microstructure causing XLPE cable to insulate changes, service life reduction, finally threatens
The safe and reliable operation of cable.Accordingly, it would be desirable to XLPE cable insulation is carried out condition diagnosing from XLPE cable microstructure angle,
Assess its insulation status.
When XLPE cable insulation executes DC voltage outside, its insulant will produce dielectric polarization phenomenon, along with
The change of XLPE cable insulation microstructure, different types of dielectric polarization occupies leading so that flow through the pole of cable insulation
Galvanic current presents different characteristics.After executing DC voltage outside removing, when short circuit XLPE cable core and metal screen layer, cable is exhausted
Defect within edge, the electric charge that impurity etc. fetters in polarization process will the most externally discharge, the XLPE electricity of different degree of agings
Cable, its bound charge ability is different, and this makes depolarization current during short circuit present difference.Therefore, by measuring XLPE cable
Cable insulation situation can be estimated by polarization and the depolarization current of insulation.
Owing to XLPE cable insulation has high resistance, this makes flow through the current of polarization of XLPE cable insulation and go to pole
Galvanic current is usually 10-6A～10-12A, faint polarization and depolarization current make it during measuring, are highly prone to electricity
Field, magnetic field and the interference along face Leakage Current so that measurement result misalignment, cause erroneous judgement to XLPE cable insulation status.
Summary of the invention
For this problem of prior art, the invention discloses what a kind of XLPE cable polarization-depolarization current was measured
Electromagnetism interference method, thus solves under current different measuring loop, institute during the measurement of XLPE cable polarization-depolarization current
The electric jamming faced, magnetic interference and along face Leakage Current disturb, improve XLPE cable polarization-depolarization current measurement
Accuracy.
The invention provides a kind of electromagnetism interference method that XLPE cable polarization-depolarization current is measured, including following
Step:
To XLPE cable floating type measure loop, XLPE cable is inserted in faraday cup, and by described faraday cup with
The earth connects；
Driving source High voltage output is connected with XLPE cable core, by current measurement by having the cable of high insulation
Blocks current enters end and is connected with XLPE cable metal screen layer, is reliably connected with the earth by current measurement module electricity outflow end,
Driving source low-pressure side is connected with the earth；
Low-resistivity layer shielding circulating application is added on XLPE cable two ends along face, and draw wiring and the earth be connected；
Low-resistivity layer shielding line is wound on the connecting line of test loop, forms the low resistance conductive ring of Guan Bi.
Present invention also offers a kind of XLPE cable polarization-depolarization current measure electromagnetism interference method, including under
State step:
To exciting signal source floating measurement loop, being placed in faraday cup by exciting signal source, faraday cup connects with the earth
Connect；
Driving source High voltage output is connected with XLPE cable core through faraday cup by having the cable of high insulation
Connect, current measurement module electric current is entered after end is connected with XLPE cable metal screen layer and is connected, by current measurement mould with the earth
Block electricity outflow end is connected with driving source low-pressure side；
Low-resistivity layer shielding circulating application is added on XLPE cable two ends along face, and draw wiring, be connected with driving source low-pressure side；
Low-resistivity layer shielding line is wound on the connecting line of test loop, forms the low resistance conductive ring of Guan Bi.
Present invention also offers a kind of XLPE cable polarization-depolarization current measure electromagnetism interference method, including under
State step:
To current measurement module floating type measure loop, current measurement module is inserted in faraday cup, faraday cup with
The earth connects；
By driving source High voltage output by there is the cable of high insulation through faraday cup and current measurement module electric current
Enter end to be reliably connected, current measurement module electricity outflow end is connected with XLPE cable core, by XLPE cable metal screen layer
It is reliably connected with the earth, driving source low-pressure side is connected with the earth；
Low-resistivity layer shielding circulating application is added on XLPE cable two ends along face, and draw wiring, be connected with driving source high-pressure side；
Low-resistivity layer shielding line is wound on the connecting line of test loop, forms the low resistance conductive ring of Guan Bi.
Further, when using low-resistivity layer shielding line to be wound low resistance conductive ring, the low resistance conductive anchor ring of formation amasss
Close with the area of test loop as far as possible, reach to offset as far as possible the purpose of external magnetic field.
Further, when using low-resistivity layer shielding circulating application to be added on XLPE cable two ends along face, low-resistivity layer shielding ring used is
There is the flexible low-resistance belt of favorable elasticity, pass through compact winding, it is achieved with cable along the purpose of face rigid contact, it is to avoid along face
The Leakage Current impact on measurement result.
In the present invention, using the wire being wound with low resistance conductive ring, the low-resistance forming Guan Bi in whole measurement loop is led
Electricity ring, the reverse induction magnetic field cancellation external magnetic field produced by low resistance conductive ring is disturbed.Use low-resistivity layer shielding ring, will let out along face
Dew electric current bridges across current measurement module, it is to avoid the interference measured polarization-depolarization current along face Leakage Current.Make usage
Draw cage, and be there is high resistant insulation by between shielding test product, it is to avoid driving source high-pressure side produces Leakage Current over the ground through faraday cup,
The measurement of impact polarization-depolarization current.Output lead has high dielectric strength, it is ensured that it will not when passing through faraday cup
Cause severe leakage, the measurement of impact polarization-depolarization current over the ground.
Present invention also offers a kind of XLPE cable polarization-depolarization current measurement apparatus, including: driving source, electric current are surveyed
Measure module, low-resistivity layer shielding line, faraday cup and be arranged on the XLPE cable within described faraday cup, metal screen layer and two
Individual low-resistivity layer shielding ring；The high-voltage output line of described driving source passes described faraday cup, and described high-voltage output line inner core and institute
The core stating XLPE cable connects；The lead-in wire picked out from described metal screen layer through described faraday cup and is connected to described electricity
The input of flow measurement module, the outfan of described current measurement module and the described equal ground connection of driving source low-pressure side；Described in two
Low-resistivity layer shielding ring is respectively arranged at the two ends of described XLPE cable, and the extraction wiring of described low-resistivity layer shielding ring is through faraday cup also
Ground connection；Described low-resistivity layer shielding line is wound in described driving source low-pressure side and described current measurement module wiring, and with described
The outer core of driving source high-voltage output line connects, and defines low resistance conductive ring.Wherein, the XLPE cable of suspension is placed in faraday cup
In, mask external electrical field and be coupled into the interference electric current of test loop by stray capacitance.
Further, after XLPE cable end is cleaned, insulation column is used to be supported in by XLPE cable described
In faraday cup.
Present invention also offers a kind of XLPE cable insulation detection device, including: driving source, current measurement module, low-resistance
Shielding line, faraday cup, XLPE cable, metal screen layer and two low-resistivity layer shielding rings；Described driving source is arranged at described farad
In cage, and the high-voltage output line of described driving source through the inner core of described high-voltage output line after described faraday cup with described
The core of XLPE cable connects；Described cable metallic screens layer is starved and is picked out wire ground；The input of described current measurement module
Ground connection, the outfan of described current measurement module is connected with described driving source low-pressure side after described faraday cup；Two low
Resistance shading ring is separately positioned on the two ends of described XLPE cable, and the extraction wiring of low-resistivity layer shielding ring through after faraday cup with swash
Encourage source low-pressure side to connect；Described low-resistivity layer shielding line is wound in described driving source low-voltage side outlet and described current measurement module wiring
On, and connect with the outer core of described driving source high-voltage output line, form low resistance conductive ring.Wherein, the driving source of suspension is placed in
In faraday cup, mask external electrical field and be coupled into the interference electric current of test loop by stray capacitance, avoid extraneous electricity simultaneously
The field interference to driving source, improves driving source output accuracy.
Present invention also offers a kind of XLPE cable insulation detection device, including: driving source, current measurement module, low-resistance
Shielding line, faraday cup, XLPE cable, metal screen layer and two low-resistivity layer shielding rings；Described current measurement module is arranged on institute
Stating in faraday cup, described driving source high-voltage output line is through the inner core of described high-voltage output line after faraday cup and described electric current
The input of measurement module connects, and the outfan of described current measurement module is through described faraday cup and described XLPE cable
Core is connected；Described cable metallic screens layer pick out wire ground, described driving source low-pressure side picks out wire ground；Two
Low-resistivity layer shielding ring is separately positioned on the two ends of described XLPE cable, the extraction wiring of low-resistivity layer shielding ring through described faraday cup with
Described current measurement module current input terminal connects；Described low-resistivity layer shielding line is wound in described driving source low-voltage side outlet and electric current
In measurement module wiring, and connect with the outer core of driving source high-voltage output line, form low resistance conductive ring.Wherein, the electricity that will suspend
Flow measurement module is placed in faraday cup, masks external electrical field and is coupled into the interference electric current of test loop by stray capacitance,
Avoid the external electrical field impact on devices such as the current supply circuit of current measurement module, AD conversion loops simultaneously, improve current measurement
The accuracy that module is measured.
Further, in different metering systems, by XLPE cable, driving source, current measurement module inserts farad
During cage, in faraday cup use insulation column each module is suspended, it is achieved the physics between each module and faraday cup every
From, it is ensured that good insulation.
Further, when using low-resistivity layer shielding line to be wound low resistance conductive ring, the low resistance conductive anchor ring of formation amasss
Close with the area of test loop as far as possible, reach to offset as far as possible the purpose of external magnetic field.
Further, when using low-resistivity layer shielding circulating application to be added on XLPE cable two ends along face, low-resistivity layer shielding ring used is
There is the flexible low-resistance belt of favorable elasticity, pass through compact winding, it is achieved with cable along the purpose of face rigid contact, it is to avoid along face
The Leakage Current impact on measurement result.
In general, by above technical scheme disclosed in this invention, it is possible to obtain following beneficial effect:
(1) to XLPE cable floating measurement mode, by XLPE cable is placed in faraday cup, former by electrostatic equilibrium
Reason, moves at the outer layer charge of faraday cup, balances each other with external electrical field, and faraday cup is internally formed an equipotential not having electric field
Body, reaches to isolate the effect of external electrical field, it is to avoid external electrical field produces sensing by stray capacitance on XLPE cable test product
Electric current, affects measurement result；
(2) to driving source floating measurement mode, by driving source is placed in faraday cup so that driving source internal electron
Device and external electrical field are isolated, it is to avoid external electrical field, by the distribution capacity interference to driving source internal electronic device, improves
The output accuracy of driving source；
(3) to current measurement module floating measurement mode, by current measurement module is placed in faraday cup so that electricity
Flow measurement module is in inside faraday cup the equipotential volume kind not having electric field, it is to avoid external electrical field by distribution capacity to electric current
Current supply circuit in measurement module, the impact of the electronic chips such as AD conversion chip, improve the certainty of measurement of current measurement module；
(4) in faraday cup, each module, when being placed in faraday cup, uses the politef conduct with high insulation
Insulation column is supported, it is ensured that have good insulation in faraday cup between each module and faraday cup, it is to avoid excitation
High-pressure side, source produces Leakage Current over the ground by faraday cup, affects measurement result；
(5) the low resistance conductive ring formed by low-resistivity layer shielding line is when measuring loop-external and there is alternating magnetic field, low at this
Producing corresponding faradic current on resistance conducting ring, this faradic current forms the magnetic field contrary with external magnetic-field direction, hands over outside
Varying magnetic field offsets, and reduces the external magnetic field impact on measurement result；
(6) by low-resistivity layer shielding ring, during making measurement, it is not passed through current measurement module along face Leakage Current, it is to avoid let out
The dew electric current impact on measurement result.
Accompanying drawing explanation
Fig. 1 is the structural representation of the XLPE cable floating measurement mode that the embodiment of the present invention provides.
Fig. 2 is the structural representation of the driving source floating measurement mode that the embodiment of the present invention provides.
Fig. 3 is the structural representation of the current measurement module floating measurement mode that the embodiment of the present invention provides.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and
It is not used in the restriction present invention.If additionally, technical characteristic involved in each embodiment of invention described below
The conflict of not constituting each other just can be mutually combined.
The electromagnetism interference method of a kind of XLPE cable insulation detection device disclosed by the invention, is divided into three parts:
XLPE cable floating measurement mode, driving source floating measurement mode and current measurement module floating measurement mode.
The XLPE cable floating measurement mode that the present invention proposes, first uses insulation column to be supported in farad XLPE cable
In cage, subsequently by faraday cup strong ground；Then driving source High voltage output is passed faraday cup and electricity by cable
Cable core connects, and current measurement module electric current is entered end and is connected with XLPE cable metal screen layer, by current measurement module electricity
Outflow end is reliably connected with the earth, driving source low-pressure side is reliably connected with the earth.Then low-resistivity layer shielding circulating application is added on XLPE
Cable two ends along face, and draw wiring, be reliably connected with the earth.Finally low-resistivity layer shielding line is wound in the company of test loop
In wiring, form the low resistance conductive ring of Guan Bi.
The driving source floating measurement mode that the present invention proposes, first uses insulation column to be supported in faraday cup driving source
In, subsequently by faraday cup strong ground；Then driving source High voltage output is passed faraday cup and cable by cable
Core connects, and is connected with current measurement module by XLPE cable metal screen layer, and is reliably connected in the earth；By current measurement mould
Block electricity outflow end is reliably connected with driving source low-pressure side.Then low-resistivity layer shielding circulating application is added on XLPE cable two ends along face,
And draw wiring, it is connected with driving source low-pressure side.Finally being wound on the connecting line of test loop by low-resistivity layer shielding line, formation is closed
The low resistance conductive ring closed.
The current measurement module floating measurement mode that the present invention proposes, first uses insulation column to prop up current measurement module
Support in faraday cup, subsequently by faraday cup strong ground；Then driving source High voltage output is passed farad by cable
Cage enters end with current measurement module electric current and connects, and is connected with XLPE cable core by current measurement module electricity outflow end, will
XLPE cable metal screen layer and driving source low-pressure side are reliably connected with the earth.Then low-resistivity layer shielding circulating application is added on XLPE cable
Two ends along face, and draw wiring, be reliably connected with the earth.Finally low-resistivity layer shielding line is wound in the connecting line of test loop
On, form the low resistance conductive ring of Guan Bi.
The driving source high-pressure side output cable that the present invention proposes, for having the double core cabinet conductor of high insulation, inner core is will
The wire of High voltage output, outer core is for forming a part for low-resistivity layer shielding ring.High insulation ensures that cable is through faraday cup
Time, core keeps good insulation with faraday cup, it is to avoid through the Leakage Current over the ground that faraday cup produces.
The low-resistivity layer shielding ring that the present invention proposes, under the different modes of connection, by cable end anti-leak conductor loops by edge
Face Leakage Current bridges across current measurement module, it is to avoid along the impact on measurement result of the face Leakage Current.
The low resistance conductive ring that the use low-resistivity layer shielding line that the present invention proposes is entwined, defines and face, whole measurement loop
Long-pending close closed-loop path, during measuring, produces the interference of reverse induction magnetic field cancellation external magnetic field.
In order to the further description embodiment of the present invention provide electric for in-site measurement XLPE cable polarization-depolarization
The method of stream, in conjunction with accompanying drawing and instantiation, details are as follows:
As it is shown in figure 1, after using superfine fibre paper that XLPE cable end is cleaned, use insulation column by XLPE
Cable support is in faraday cup；Then by driving source high-voltage output line through faraday cup, output lead inner core and cable core
Connect；From cable metallic screens layer picking out lead-in wire through faraday cup be connected to current measurement module enter end, current measurement module is defeated
Go out end and the common reliable ground of driving source low-pressure side；By firm for low-resistivity layer shielding ring be connected to cable two ends after, draw wiring through method
Cage is drawn to be connected to the earth；Low-resistivity layer shielding line is used to be wound in driving source low-voltage side outlet and current measurement module wiring, and with
The outer core of driving source high-voltage output line connects, and forms low resistance conductive ring, completes to measure the wiring in loop.
As in figure 2 it is shown, after using superfine fibre paper that XLPE cable end is cleaned, use insulation column to encourage
Source is supported in faraday cup；Then by driving source high-voltage output line through faraday cup, output lead inner core and cable core phase
Connect；Lead-in wire reliable ground is picked out from cable metallic screens layer；Current measurement module input is reliably connected with the earth, outfan
It is connected through faraday cup with driving source low-pressure side；Low-resistivity layer shielding ring is firm be connected to cable two ends after, draw wiring through method
Cage is drawn to be connected with driving source low-pressure side；Use low-resistivity layer shielding line to be wound in driving source low-voltage side outlet and current measurement module connects
On line, and connect with the outer core of driving source high-voltage output line, form low resistance conductive ring, complete to measure the wiring in loop.
As it is shown on figure 3, after using superfine fibre paper that XLPE cable end is cleaned, use insulation column by electric current
Measurement module is supported in faraday cup；Then by driving source high-voltage output line through faraday cup, output lead inner core and electric current
Measurement module input connects；Current measurement module outfan is connected through faraday cup with cable core；From cable gold
Belonging to screen layer to pick out lead-in wire and be greatly reliably connected, driving source low-pressure side picks out lead-in wire and the earth is reliably connected；Low-resistivity layer shielding ring
Firm be connected to cable two ends after, draw wiring and be connected with current measurement module current input terminal through faraday cup；Use low-resistance
Shielding line is wound in driving source low-voltage side outlet and current measurement module wiring, and with the outer core phase of driving source high-voltage output line
Connect, form low resistance conductive ring, complete to measure the wiring in loop.
As it will be easily appreciated by one skilled in the art that and the foregoing is only presently preferred embodiments of the present invention, not in order to
Limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, all should comprise
Within protection scope of the present invention.
Claims (9)
1. an XLPE cable insulation detection device and electromagnetism interference method thereof, it is characterised in that comprise the steps:
XLPE cable floating type is measured loop, XLPE cable is inserted in faraday cup, and by described faraday cup and the earth
Connect；
Driving source High voltage output is connected with XLPE cable core, by current measurement module by having the cable of high insulation
Electric current enters end and is connected with XLPE cable metal screen layer, is reliably connected with the earth by current measurement module electricity outflow end, will swash
Encourage source low-pressure side to be connected with the earth；
Low-resistivity layer shielding circulating application is added on XLPE cable two ends along face, and draw wiring and the earth be connected；
Low-resistivity layer shielding line is wound on the connecting line of test loop, forms the low resistance conductive ring of Guan Bi.
2. an XLPE cable insulation detection device and electromagnetism interference method thereof, it is characterised in that comprise the steps:
To exciting signal source floating measurement loop, being placed in faraday cup by exciting signal source, faraday cup is connected with the earth；
Driving source High voltage output is connected with XLPE cable core through faraday cup by having the cable of high insulation, will
Current measurement module electric current enter after end is connected with XLPE cable metal screen layer be greatly connected, by current measurement module electric current
Go out end to be connected with driving source low-pressure side；
Low-resistivity layer shielding circulating application is added on XLPE cable two ends along face, and draw wiring, be connected with driving source low-pressure side；
Low-resistivity layer shielding line is wound on the connecting line of test loop, forms the low resistance conductive ring of Guan Bi.
3. an XLPE cable insulation detection device and electromagnetism interference method thereof, it is characterised in that comprise the steps:
Current measurement module floating type is measured loop, current measurement module is inserted in faraday cup, faraday cup and the earth
Connect；
Driving source High voltage output is entered end through faraday cup with current measurement module electric current by having the cable of high insulation
It is reliably connected, current measurement module electricity outflow end is connected with XLPE cable core, by XLPE cable metal screen layer with big
Be reliably connected, by driving source low-pressure side with the earth be connected；
Low-resistivity layer shielding circulating application is added on XLPE cable two ends along face, and draw wiring, be connected with driving source high-pressure side；
Low-resistivity layer shielding line is wound on the connecting line of test loop, forms the low resistance conductive ring of Guan Bi.
4. the electromagnetism interference method as described in any one of claim 1-3, it is characterised in that be wound around using low-resistivity layer shielding line
When forming low resistance conductive ring, the low resistance conductive anchor ring of formation is long-pending close with the area of test loop as far as possible, reaches to support as far as possible
Disappear the purpose of external magnetic field.
5. the electromagnetism interference method as described in any one of claim 1-3, it is characterised in that add using low-resistivity layer shielding circulating application
When XLPE cable two ends are along face, low-resistivity layer shielding ring used is the flexible low-resistance belt with favorable elasticity, by compact winding, real
Now with cable along the purpose of face rigid contact, it is to avoid along the impact on measurement result of the face Leakage Current.
6. an XLPE cable insulation detection device, it is characterised in that including: driving source, current measurement module, low-resistivity layer shielding
Line, faraday cup and be arranged on the XLPE cable within described faraday cup, metal screen layer and two low-resistivity layer shielding rings；
The high-voltage output line of described driving source passes described faraday cup, and described high-voltage output line inner core and described XLPE cable
Core connect；
The lead-in wire picked out from described metal screen layer is through described faraday cup the input that is connected to described current measurement module
End, the outfan of described current measurement module and the described equal ground connection of driving source low-pressure side；
Two described low-resistivity layer shielding rings are respectively arranged at the two ends of described XLPE cable, and the extraction wiring of described low-resistivity layer shielding ring is worn
Cross faraday cup ground connection；
Described low-resistivity layer shielding line is wound in described driving source low-pressure side and described current measurement module wiring, and swashs with described
The outer core encouraging source high-voltage output line connects, and defines low resistance conductive ring.
7. XLPE cable insulation detection device as claimed in claim 6, it is characterised in that XLPE cable end is cleaned
After, use insulation column to be supported in described faraday cup by XLPE cable.
8. an XLPE cable insulation detection device, it is characterised in that including: driving source, current measurement module, low-resistivity layer shielding
Line, faraday cup, XLPE cable, metal screen layer and two low-resistivity layer shielding rings；
After described driving source is arranged in described faraday cup, and the high-voltage output line of described driving source passes described faraday cup
The inner core of described high-voltage output line is connected with the core of described XLPE cable；
Described cable metallic screens layer is starved and is picked out wire ground；
The input end grounding of described current measurement module, the outfan of described current measurement module through after described faraday cup with
Described driving source low-pressure side is connected；
Two low-resistivity layer shielding rings are separately positioned on the two ends of described XLPE cable, and the extraction wiring of low-resistivity layer shielding ring is through farad
It is connected with driving source low-pressure side after cage；
Described low-resistivity layer shielding line is wound in described driving source low-voltage side outlet and described current measurement module wiring, and with described
The outer core of driving source high-voltage output line connects, and forms low resistance conductive ring.
9. an XLPE cable insulation detection device, it is characterised in that including: driving source, current measurement module, low-resistivity layer shielding
Line, faraday cup, XLPE cable, metal screen layer and two low-resistivity layer shielding rings；
Described current measurement module is arranged in described faraday cup, and described driving source high-voltage output line passes institute after faraday cup
The input of the inner core and described current measurement module of stating high-voltage output line connects, and the outfan of described current measurement module passes
Described faraday cup is connected with the core of described XLPE cable；
Described cable metallic screens layer pick out wire ground, described driving source low-pressure side picks out wire ground；
Two low-resistivity layer shielding rings are separately positioned on the two ends of described XLPE cable, and the extraction wiring of low-resistivity layer shielding ring passes described method
Cage is drawn to be connected with described current measurement module current input terminal；
Described low-resistivity layer shielding line is wound in described driving source low-voltage side outlet and current measurement module wiring, and high with driving source
The outer core of pressure output lead connects, and forms low resistance conductive ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610679809.0A CN106324454B (en) | 2016-08-17 | 2016-08-17 | A kind of XLPE cable insulation detection device and its electromagnetism interference method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610679809.0A CN106324454B (en) | 2016-08-17 | 2016-08-17 | A kind of XLPE cable insulation detection device and its electromagnetism interference method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106324454A true CN106324454A (en) | 2017-01-11 |
| CN106324454B CN106324454B (en) | 2019-05-03 |
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| CN107192918A (en) * | 2017-05-29 | 2017-09-22 | 西南交通大学 | Vehicle-mounted cable termination leakage current testing System and method at a temperature of particular surroundings |
| CN108318786A (en) * | 2017-01-18 | 2018-07-24 | 中国电力科学研究院 | A kind of discrimination method and device of power distribution network cable run insulation ag(e)ing risk |
| CN110231511A (en) * | 2019-07-05 | 2019-09-13 | 上海交通大学 | Isothermal relaxation current detection means based on separating and measuring loop method |
| CN111736043A (en) * | 2020-06-19 | 2020-10-02 | 西安交通大学 | XLPE cable degassing state evaluation method based on low-frequency dielectric spectrum |
| CN113075507A (en) * | 2021-03-29 | 2021-07-06 | 云南电网有限责任公司曲靖麒麟供电局 | High-voltage measuring device |
| CN113917195A (en) * | 2021-09-13 | 2022-01-11 | 华中科技大学 | Cable insulation diagnostic device anchor clamps of anti-electromagnetic interference |
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| CN111736043A (en) * | 2020-06-19 | 2020-10-02 | 西安交通大学 | XLPE cable degassing state evaluation method based on low-frequency dielectric spectrum |
| CN113075507A (en) * | 2021-03-29 | 2021-07-06 | 云南电网有限责任公司曲靖麒麟供电局 | High-voltage measuring device |
| CN113917195A (en) * | 2021-09-13 | 2022-01-11 | 华中科技大学 | Cable insulation diagnostic device anchor clamps of anti-electromagnetic interference |
| CN113917195B (en) * | 2021-09-13 | 2022-11-11 | 华中科技大学 | Cable insulation diagnostic device anchor clamps of anti-electromagnetic interference |
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