CN106680679A - Cable insulating material surface charge measuring device and method - Google Patents
Cable insulating material surface charge measuring device and method Download PDFInfo
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- CN106680679A CN106680679A CN201710009140.9A CN201710009140A CN106680679A CN 106680679 A CN106680679 A CN 106680679A CN 201710009140 A CN201710009140 A CN 201710009140A CN 106680679 A CN106680679 A CN 106680679A
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- signal
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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
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/24—Arrangements for measuring quantities of charge
Abstract
The invention discloses a cable insulating material surface charge measuring device and method. The method includes that a pulse signal is applied on a to-be-measured cable sample to enable charge accumulation to occur on the surface of a to-be-measured cable insulating material, surface potential of the to-be-measured cable insulating material is measured, charge quantity on the surface of the to-be-measured cable sample insulating material is calculated through the surface potential, and aging degree or damaging condition of a to-be-measured cable is evaluated; during testing, an electromagnetic wave signal generated at the discharging moment of the to-be-measured cable sample is utilized to generate a starting instruction signal for triggering a testing platform to move; the to-be-measured cable sample is driven to move through movement of the testing platform, so that other objects are avoided contacting with the to-be-measured cable sample, charge exchange is avoided, and accuracy of measuring results is improved; the electromagnetic wave signal generated at the discharging moment of the to-be-measured cable sample is utilized to generate a stop instruction signal for triggering a testing signal generation unit to stop running, so that the process of measuring surface charge is enabled to be free of interference of the pulse signal, and accuracy of the measuring results is further improved.
Description
Technical field
The present invention relates to cable material detection technique field, more particularly to cable insulation material surface charge measuring device with
Method.
Background technology
At high voltage power transmission field, power transmission cable longtime running, by the severe ring such as electric, heat effect and humidity, water inlet
Border affects, therefore, unavoidably there is the failure such as aging, damaged in cable, so as to affect the normal operation of power circuit or equipment.
In order to reduce the running losses that cable fault is caused to power circuit or equipment, surface charge test need to be carried out to cable, be passed through
The electric charge on measurement cable insulation material surface, analyzes the state of insulation of the cable, so as to judge the whether normal of the cable.It is former
Reason is：When electric charge in failure cable changes, the electric field in cable will be caused to be distorted, so as to affect cable insulation
The electric charge of material surface.
The process that cable insulation material surface charge is tested is included, first, pulse signal is produced and is applied
On cable under test sample, cable under test sample is discharged under the excitation of pulse signal on the surface of its insulant, and
Charge accumulated is produced on insulant surface；Then, the electric charge of cable insulation material surface accumulation is measured, finally, root
The insulating properties of cable are analyzed according to measurement result.
In prior art, pulse signal is applied to sample of cable to be measured with the measurement cable insulation material surface accumulation quantity of electric charge
The step of, needs are carried out on different instruments, i.e., sample of cable to be measured is applied after pulse signal by pulse generating units,
Needs artificially remove cable under test sample from pulse generating units, are transferred to for the device of measurement surface electric charge,
Cable insulation material surface to be measured stored charge can be measured.During transfer cable under test sample, one will be produced
Fixed time delay, during this period, the electric charge of cable under test insulant surface accumulation will be decayed, therefore, prior art
The surface stored charge of middle measurement not transient surface stored charge, therefore, have impact on and charge measurements are accumulated to surface
Accuracy, so as to have impact on the accuracy to sample of cable insulating properties to be measured analysis.Simultaneously as locus conversion causes
Cable undergoes more electromagnetic interference, also have impact on the measurement result to surface stored charge, so as to have impact on to cable under test
The accurate analysis of sample insulating properties.
The content of the invention
The invention provides a kind of cable insulation material surface charge measuring device and method, to solve prior art in survey
The cable insulation material surface stored charge and non-momentary stored charge of amount, so as to affect surface accumulation charge measurements accurate
Property, and then affect the problem of insulating performance of cable analysis result accuracy.
A kind of cable insulation material surface charge measuring device, including test signal generating unit, electrostatic measurement unit, survey
Examination platform and driver element, the test signal generating unit includes pulse power source module and the pulse generator being sequentially connected；
The electrostatic measurement unit includes surface potential measurement device, and the surface potential measurement device is used to measure cable under test insulant
Surface potential；
The test platform is connected with driver element, and the test platform is used to place cable under test sample, the driving
Unit is used to drive the test platform to move, and cable under test sample is moved to from position corresponding with the pulse generator
Position corresponding with the surface potential measurement device；
Described device also includes electro wave receiver and the control module being sequentially connected, and the electro wave receiver is treated for reception
Survey the electromagnetic wave signal of sample of cable electric discharge moment generation；The control module includes that driver element enables submodule, the drive
Moving cell enables submodule and connects the driver element, and the driver element enables submodule to be used to start driver element.
Preferably, the control module also includes pulse termination submodule, the pulse termination submodule and the pulse
Power module is connected, and the pulse termination submodule is used to control the pulse power source module stopping generation pulse signal.
Preferably, described device includes the first insulating support and the second insulating support, and first insulating support is used for solid
The fixed pulse generator, second insulating support is used to fix the surface potential measurement device.
Preferably, the electrostatic measurement unit also includes data disaply moudle, and the data disaply moudle is used to show institute
State the surface potential on the cable under test insulant surface of surface potential measurement device collection.
A kind of cable insulation material surface charge measurement method, including,
The pulse signal of predetermined waveform is produced using test signal generating unit；
The pulse signal is applied to the cable under test sample being placed on test platform, cable under test sample is produced
Electric discharge and surface charge accumulation；
The electromagnetic wave signal that collection cable under test sample electric discharge moment produces, and the electromagnetic wave signal of collection is delivered to into control
Molding block；
Driver element in control module enables submodule according to the electromagnetic wave signal for receiving, and produces enabled instruction letter
Number, and the start command signal is delivered to into driver element；
Driver element receives start command signal, drives test platform to be moved；
The surface potential of measurement cable under test insulant surface charge.
Preferably, methods described also includes,
Pulse termination submodule in control module produces stop instruction signal according to the electromagnetic wave signal for receiving,
And the stop instruction signal is delivered to into test signal generating unit；
Test signal generating unit stops producing pulse signal according to the stop instruction signal for receiving.
Preferably, methods described also includes, shows the surface potential of cable under test insulant surface charge.
The invention discloses a kind of cable insulation material surface charge measuring device and method, by the way that pulse signal is applied
On cable under test sample, make cable under test insulant surface charge accumulation occur, measure the table of cable under test insulant
Face current potential, by measured surface potential the quantity of electric charge on cable under test sample insulant surface is calculated, and then is analyzed to be measured
The insulating properties of sample of cable, assess the degree of aging or deterioration extent of cable under test.In testing, using cable under test sample
The electromagnetic wave signal that electric discharge moment produces, produces the start command signal of triggering test platform motion, is moved by test platform
Drive the movement of cable under test sample, it is to avoid the contact with cable under test sample of other objects, prevent cable under test specimen surface
There is charge-exchange in electric charge, with other objects so as to improve the accuracy of measurement result.Meanwhile, discharged using cable under test sample
The electromagnetic wave signal that moment produces, produces triggering test signal generating unit stop instruction signal out of service, makes surface electricity
Position measuring device is not disturbed during the surface charge of measurement cable under test insulant by pulse feature signal, therefore, carry
The high accuracy of surface potential measurement device measurement result.
Description of the drawings
In order to be illustrated more clearly that technical scheme, letter will be made to the accompanying drawing to be used needed for embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is a kind of structural representation of cable insulation material surface charge measuring device provided in an embodiment of the present invention；
Fig. 2 is a kind of flow chart of cable insulation material surface charge measurement method provided in an embodiment of the present invention；
Label in Fig. 1-2 is expressed as：11- pulse power source modules, 12- pulse generators, 21- surface potential measurements
Device, 22- data disaply moudles, 3- test platforms, 4- driver elements, 5- electro wave receivers, 6- control modules, 61- driver elements
Enable submodule, 62- pulse termination submodules, the insulating supports of 71- first, the insulating supports of 72- second.
Specific embodiment
In order that those skilled in the art more fully understand the technical scheme in the present invention, below in conjunction with of the invention real
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described enforcement
Example is only a part of embodiment of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, should all belong to protection of the present invention
Scope.
Fig. 1 is a kind of structural representation of cable insulation material surface charge measuring device provided in an embodiment of the present invention,
As shown in figure 1, cable insulation material surface charge measuring device includes test signal generating unit, electrostatic measurement unit, test
Platform 3 and driver element 4, wherein, test platform 3 is used to place cable under test sample.
Test signal generating unit includes the pulse power source module 11 being sequentially connected and pulse generator 12.Pulse power mould
Block 11 can produce the pulse signal of multiple waveforms, such as square-wave pulse signal, and for cable under test sample swashing for different qualities is provided
Encourage.Pulse power source module 11 produces the pulse signal needed for test, and is sent out pulse signal transmission to pulse by high-voltage conducting wires
Raw device 12, pulse generator 12 is applied to pulse signal on cable under test sample.The species of pulse generator has various, for example
Needle electrode, it belongs to protection scope of the present invention.
Pulse signal acts on cable under test sample, makes cable under test insulant surface charge accumulation occur.This enforcement
In example, electrostatic measurement unit includes a surface potential measurement device 21, the measurement cable under test insulant of surface potential measurement device 21
Surface potential, the quantity of electric charge on cable under test insulant surface is calculated by measured surface potential, and then analyze to be measured
The insulating properties of cable, assess the degree of aging or deterioration extent of cable under test.
For the ease of checking measurement result, in the present embodiment, electrostatic measurement unit also includes data disaply moudle 22, data
Display module 22 is used for the surface potential on the cable under test insulant surface of the collection of display surface electric potential measuring instrument 21.
Test platform 3 is connected with driver element 4, and driver element 4 is used to drive test platform 3 to move, so that electricity to be measured
Cable sample moves to the position corresponding with surface potential measurement device from the position corresponding with pulse generator.It is artificial with adopting
The mode of transfer cable under test sample is compared, and in the present embodiment, the movement for driving cable under test sample is moved by test platform,
The contact of other objects and cable under test sample is avoided, is prevented cable under test specimen surface electric charge from electric charge occurring with other objects and is handed over
Change, so as to improve the accuracy of measurement result.
Driver element 4 drive test platform 3 move, so as to drive cable under test sample from the corresponding position of pulse generator 12
The place of putting moves to and the corresponding position of surface potential measurement device 21.The way of realization of this process has various, and it belongs to the present invention
Protection domain.For example, driver element includes a motor, and an expansion link is stretched out in motor, and the free end of expansion link is flat with test
Platform is fixedly connected, and motor drives expansion link to move along a straight line along the axis direction of expansion link, so as to drive test platform horizontal movement.
In the present embodiment, driver element 4 includes a motor, and a rotary shaft, free end and the survey of rotary shaft are stretched out in motor
Examination platform 3 is fixedly connected, and motor drives rotary shaft rotary motion, so as to drive test platform 3 to rotate, wherein, test platform 3
Rotary shaft is perpendicular to the place plane of test platform 3.
During actual test, pulse generator 12 is placed in the top of the one end of test platform 3, surface potential measurement device 21
The top of the other end of test platform 3 is placed in, cable under test sample is placed near pulse generator 12 on test platform 3, work as test
After platform 3 rotates 180 °, by the lower section for driving cable under test sample to be threaded to surface potential measurement device 21.
Certainly, if test platform is a circular platform, can according to actual needs adjust pulse generator and survey with surface potential
The relative position of measuring device, by the angle for controlling test platform rotation, real cable under test sample is on pulse generator and surface
Position movement between electric potential measuring instrument.
In order to fix the relative position of cable under test sample and pulse generator 12, and fixed cable under test sample and table
The correspondence position of face electric potential measuring instrument 21, in the present embodiment, cable insulation material surface charge measuring device is additionally provided with a fixation
Component, fixation kit includes the first insulating support 71 and the second insulating support 72.First insulating support is used for pulse generator
One end of test platform is fixed on, the second insulating support is used to that surface potential measurement device to be fixed on the other end of test platform.
During actual test, apply after pulse signal to cable under test sample, cable under test sample will be believed pulse
Number response, its insulant surface discharges, and a large amount of electric charges is accumulated on its insulant surface.Cable under test insulant
The electric charge of surface accumulation is decayed with the time, therefore, in order to ensure the accuracy of measurement result, should detect that cable under test is exhausted
The electric charge that edge material is instantaneously accumulated in electric discharge transient surface.
In the present embodiment, cable insulation material surface charge measuring device includes the electro wave receiver 5 being sequentially connected and control
Molding block 6, electro wave receiver 5 is used to receive the electromagnetic wave signal of cable under test sample electric discharge moment generation.Control module 6 includes
Driver element enables submodule 61, and driver element enables submodule 61 and is connected with driver element 4, and driver element enables submodule
61 are used to start driver element 4.
During actual test, the electromagnetic wave signal for receiving is sent to driver element and enables submodule by electro wave receiver
Block；Driver element enables submodule according to the electromagnetic wave letter production start command signal for receiving, and sends this signal to drive
Moving cell；Driver element is received after start command signal, drive test platform rotation, so as to drive cable under test sample from
Go at the corresponding position of pulse generator at position corresponding with surface potential measurement device, now, surface potential measurement device is
The surface potential of cable insulation material to be measured can be measured.Compared with artificial transfer cable under test sample in prior art,
The cable insulation material surface charge measuring device that the present embodiment is provided can sensitively sense the electric discharge of cable under test sample, and
The quick corresponding position that cable under test sample is transferred to surface potential measurement device, it is instantaneous to measure cable under test specimen surface
The electric charge of accumulation.
When surface potential measurement device measures the surface potential of cable under test insulant, if pulse generator occurs simultaneously
Pulse signal, will affect the data precision of surface potential measurement device measurement.Therefore, in the present embodiment example, control module 6 includes
Pulse termination submodule 62, pulse termination submodule 62 is connected with pulse power source module 11, and pulse termination submodule 62 is used to control
Pulse power source module processed 11 stops producing pulse signal.
The electromagnetic wave signal for receiving is sent to driver element and enables submodule by electro wave receiver, meanwhile, also by electromagnetism
Ripple signal is sent to pulse termination submodule.Pulse termination submodule produces a command for stopping according to the electromagnetic wave signal for receiving
Signal, and command for stopping signal is sent to pulse power source module；Pulse power source module receives command for stopping signal, stops producing
Pulse signal.Now, the process of the surface charge of the measurement cable under test insulant of surface potential measurement device will not receive pulse
The interference of property signal, this improves surface potential measurement device measurement data accuracy.
Fig. 2 is a kind of flow chart of cable insulation material surface charge measurement method provided in an embodiment of the present invention, the party
Method comprises the steps：
Step 101, using test signal generating unit the pulse signal of predetermined waveform is produced.
In the present embodiment, the pulse signal of predetermined waveform is produced using test signal generating unit, test signal occurs single
Unit includes pulse power source module and the pulse generator being sequentially connected.Pulse power source module can produce the pulse letter of multiple waveforms
Number, such as square-wave pulse signal, for the excitation that cable under test sample provides different qualities.
Step 102, pulse signal is applied to the cable under test sample being placed on test platform, makes cable under test sample
Electric discharge is produced with surface charge accumulation.
By the pulse signal transmission for producing to pulse generator, pulse generator applies pulse signal to pulse power source module
On cable under test sample.In the present embodiment, pulse generator is a needle electrode, and needle electrode to cable under test sample applies pulse
Signal.
Step 103, gathers the electromagnetic wave signal of cable under test sample electric discharge moment generation, and the electromagnetic wave signal that will be gathered
It is delivered to control module.
In the present embodiment, the electromagnetic wave signal of cable under test sample electric discharge moment generation is gathered using electro wave receiver, and
The electromagnetic wave signal of collection is delivered to into control module.
Step 104, the driver element in control module enables submodule and is referred to according to the electromagnetic wave signal generation startup for receiving
Signal is made, and start command signal is delivered to into driver element.
Step 105, driver element receives start command signal, drives test platform to be moved.
In the present embodiment, driver element receives start command signal, and driver element is opened, and drives test platform motion, from
And drive the cable under test sample on test platform that position movement occurs, even if cable under test sample is from corresponding with pulse generator
Position move to position corresponding with surface potential measurement device.
If surface potential measurement device measures the surface potential of cable under test insulant, there is arteries and veins in pulse generator simultaneously
Signal is rushed, the accuracy of the data of surface potential measurement device measurement collection will be affected.Therefore, in order that cable under test insulant
Surface charge do not affected by pulse feature signal, cable insulation material surface charge measurement method also includes,
Step 110, the electromagnetic wave signal that the pulse termination submodule in control module is received produces stop instruction signal,
And stop instruction signal is delivered to into test signal generating unit；
Step 111, the stop instruction signal that test signal generating unit is received stops producing pulse signal.
Step 106, surface potential measurement device is measured to the current potential on cable insulation material surface to be measured.
For the ease of checking measurement result, the method also includes,
Step 120, shows the surface potential of cable under test insulant surface charge.
In the present embodiment, the surface potential of measurement is reached data disaply moudle, data display mould by surface potential measurement device
Block shows to surface potential.Finally, cable under test sample insulant surface is calculated by measured surface potential
The quantity of electric charge, and then the insulating properties of cable under test are analyzed, assess the degree of aging or deterioration extent of cable under test.
It should be noted that herein, the relational terms of such as " first " and " second " or the like are used merely to one
Individual entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operate it
Between there is any this actual relation or order.And, term " including ", "comprising" or its any other variant are intended to
Cover including for nonexcludability, so that a series of process, method, article or equipment including key elements not only includes those
Key element, but also including other key elements being not expressly set out, or also include for this process, method, article or set
Standby intrinsic key element.In the absence of more restrictions, the key element for being limited by sentence "including a ...", it is not excluded that
Also there is other identical element in the process including the key element, method, article or equipment.
Invention described above embodiment does not constitute limiting the scope of the present invention.
Claims (7)
1. a kind of cable insulation material surface charge measuring device, it is characterised in that survey including test signal generating unit, electrostatic
Amount unit, test platform (3) and driver element (4), the test signal generating unit includes the pulse power mould being sequentially connected
Block (11) and pulse generator (12)；The electrostatic measurement unit includes surface potential measurement device (21), and the surface potential is surveyed
Measuring device (21) is for measuring the surface potential of cable under test insulant；
The test platform (3) is connected with driver element (4), and the test platform (3) is described for placing cable under test sample
Driver element (4) makes cable under test sample from right with the pulse generator (12) for driving the test platform (3) to move
The position answered moves to position corresponding with the surface potential measurement device (21)；
Described device also includes electro wave receiver (5) and the control module (6) being sequentially connected, and the electro wave receiver (5) is used for
Receive the electromagnetic wave signal of cable under test sample electric discharge moment generation；The control module (6) enables submodule including driver element
Block (61), the driver element enables submodule (61) and connects the driver element (4), and the driver element enables submodule
(61) for starting driver element (4).
2. device as claimed in claim 1, it is characterised in that the control module (6) also includes pulse termination submodule
(62), the pulse termination submodule (62) is connected with the pulse power source module (11), the pulse termination submodule
(62) stop producing pulse signal for controlling the pulse power source module (11).
3. device as claimed in claim 1, it is characterised in that described device includes the first insulating support (71) with the second insulation
Support (72), first insulating support (71) is for fixing the pulse generator (12), second insulating support (72)
For fixing the surface potential measurement device (21).
4. device as claimed in claim 1, it is characterised in that the electrostatic measurement unit also includes data disaply moudle
(22), the data disaply moudle (22) is for showing the cable under test insulant of the surface potential measurement device (21) collection
The surface potential on surface.
5. a kind of cable insulation material surface charge measurement method, it is characterised in that include,
The pulse signal of predetermined waveform is produced using test signal generating unit；
The pulse signal is applied to the cable under test sample being placed on test platform, makes cable under test sample produce electric discharge
And surface charge accumulation；
The electromagnetic wave signal that collection cable under test sample electric discharge moment produces, and the electromagnetic wave signal of collection is delivered to into control mould
Block；
Driver element in control module enables submodule according to the electromagnetic wave signal for receiving, and produces start command signal,
And the start command signal is delivered to into driver element；
Driver element receives start command signal, drives test platform to be moved；
The surface potential of measurement cable under test insulant surface charge.
6. method as claimed in claim 5, it is characterised in that methods described also includes,
The electromagnetic wave signal that pulse termination submodule in control module is received, produces stop instruction signal, and will be described
Stop instruction signal is delivered to test signal generating unit；
The stop instruction signal that test signal generating unit is received, stops producing pulse signal.
7. method as claimed in claim 5, it is characterised in that methods described also includes, shows cable under test insulant table
The surface potential of surface charge.
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| CN201710009140.9A CN106680679A (en) | 2017-01-06 | 2017-01-06 | Cable insulating material surface charge measuring device and method |
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| CN201710009140.9A CN106680679A (en) | 2017-01-06 | 2017-01-06 | Cable insulating material surface charge measuring device and method |
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| CN108152354A (en) * | 2018-02-05 | 2018-06-12 | 四川大学 | A kind of dielectric material surface charge self-operated measuring unit based on two axis slide units |
| CN108761296A (en) * | 2018-08-27 | 2018-11-06 | 云南电网有限责任公司电力科学研究院 | External insulation VFTO burst loss rate experimental rigs and method in hypobaric |
| WO2019051659A1 (en) * | 2017-09-12 | 2019-03-21 | 青岛科技大学 | Semiconductor charge emission test method and apparatus |
| CN110187243A (en) * | 2019-04-23 | 2019-08-30 | 江苏维尔兰电缆有限公司 | A kind of detection device for insulation performance in charge bearing detecting cable production process |
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| CN110187243A (en) * | 2019-04-23 | 2019-08-30 | 江苏维尔兰电缆有限公司 | A kind of detection device for insulation performance in charge bearing detecting cable production process |
| CN110187243B (en) * | 2019-04-23 | 2021-05-28 | 江苏新华能电缆有限公司 | Detection device for insulation performance in load-bearing detection cable production process |
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