CN106249098A - Testing device for current leakage and method of testing is saved on high-voltage arrester - Google Patents
Testing device for current leakage and method of testing is saved on high-voltage arrester Download PDFInfo
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- CN106249098A CN106249098A CN201610716573.3A CN201610716573A CN106249098A CN 106249098 A CN106249098 A CN 106249098A CN 201610716573 A CN201610716573 A CN 201610716573A CN 106249098 A CN106249098 A CN 106249098A
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- voltage
- umbrella
- microammeter
- high voltage
- arrester
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
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Abstract
nullTesting device for current leakage and method of testing is saved on the open a kind of high-voltage arrester of the present invention，Device includes dam umbrella and leakage current testing assembly，The described umbrella that dams is electrically connected with described leakage current testing assembly，The described umbrella that dams removably connects with high-voltage arrester，The described umbrella that dams is located at described high-voltage arrester between middle joint flange and the grading ring of described high-voltage arrester that upper joint is nearest，The described umbrella that dams is located on the insulation sleeve of described high-voltage arrester，When using joint testing device for current leakage on high-voltage arrester，The umbrella that dams is installed on high-voltage arrester on the insulation sleeve of joint，The electric current that the stray capacitance caused on the umbrella that dams is formed can be measured by grading ring，Its numerical value is equal to the interference electric current in spark gap，The numerical value of described electric current is deducted when subsequently measurement data being processed，Just can obtain the data of leakage current more accurately，The umbrella that simultaneously dams removably connects with high-voltage arrester，Easy to use，Decrease the workload measuring work.
Description
Technical field
The present invention relates to Leakage Current field tests, particularly relate on high-voltage arrester save testing device for current leakage and
Method of testing.
Background technology
High-voltage arrester is connected between cable and the earth, generally in parallel with by protection equipment.The core of high-voltage arrester
Parts are varistor, and varistor has non-linear volt-ampere curve characteristic, under normal working voltage, the resistance of varistor
Very big, by the most hundreds of microampere of the electric current of varistor, and when excessive voltage invades, varistor near short circuit, made
Voltage runs through earth lead and imports the earth, and with the spoke value of limit system voltage, varistor the most quickly recovers high resistant subsequently
State, thereby protects equipment the most breakdown.Stray capacitance is had over the ground so that along the voltage of high-voltage arrester due to high-voltage arrester
Skewness, easily at the local generation partial breakdown that voltage is high, causes damage to high-voltage arrester.Therefore a high pressure is increased
Arrester grading ring can make the voltage's distribiuting along high-voltage arrester uniform, will not puncture.
The insulating properties of high-voltage arrester is the key factor that working voltage judges high-voltage arrester quality.And high voltage lightning-protection
The insulating properties of device mainly by testing high voltage leakage current of an arrester numerical value determine, high-voltage arrester generally at upper joint equipped with all pressing
Ring, but grading ring and internode on high-voltage arrester are due to close together, can there is stray capacitance, economize on electricity in road on spark gap
Forming interference electric current, the interference electric current that during experiment, grading ring causes is measured together with upper joint Leakage Current, causes in-site measurement
Time on, current is bigger than normal, it is difficult to the insulating properties of accurate response high-voltage arrester, existing can avoid what grading ring disturbed mainly to arrange
Shi You: 1, dismantling grading ring during test, the method workload is big, needs special equipment and has certain danger；2, shielding, high
Pressure shield effectiveness is bad, and low pressure shielding cannot realize；3, artificially estimating, the environment residing for high-voltage arrester is different, estimation error
Greatly.
Summary of the invention
Based on this, the invention reside in and overcome the deficiencies in the prior art, it is provided that one easily operates and measures high pressure accurately and keeps away
Testing device for current leakage and method of testing is saved on thunder device.
Its technical scheme is as follows:
Testing device for current leakage is saved on a kind of high-voltage arrester, including umbrella and the leakage current testing assembly of damming, described
Dam umbrella and described Leakage Current test suite is electrically connected with, described in the umbrella that dams removably connect with high-voltage arrester, described section
Stream umbrella is located at described high-voltage arrester between middle joint flange and the grading ring of described high-voltage arrester that upper joint is nearest, described section
Stream umbrella is located on the insulation sleeve of described high-voltage arrester.
Below a kind of technical scheme is further described:
Wherein in an embodiment, described in the pack that dams include internal ring, outer shroud and rod member, described internal ring is equal with described outer shroud
Be placed on outside described high-voltage arrester, described internal ring internal diameter be less than described outer shroud, described in be located on described insulation sleeve, described in
Ring is connected by described rod member with described outer shroud, is also associated with metal wire between described internal ring and described outer shroud.
Wherein in an embodiment, described outer shroud is provided with the first fracture and the second fracture, and described outer shroud is described
One fracture disconnects with described second incision position, and described first fracture two ends are hinged, and described second fracture two ends can by fixture
Dismounting connects, and described internal ring is to be provided with the 3rd fracture disconnected with the 4th with described first fracture, described second fracture corresponding position
Mouthful.
Wherein in an embodiment, described outer be located on described grading ring and the described middle joint flange nearest away from upper joint it
Between, described bore diameter of outer ring is not less than the internal diameter of described grading ring.
Wherein in an embodiment, described internal ring, outer shroud and rod member are conductive material.
Wherein in an embodiment, described in dam the exhausted of arbitrary position and the described middle joint flange nearest away from upper joint on umbrella
Edge creep age distance is all higher than 80cm.
Wherein in an embodiment, described Leakage Current test suite includes that high voltage direct current generator, the first high pressure are micro-
Peace table, the second high voltage microammeter and the 3rd high voltage microammeter, described high voltage direct current generator and described first high voltage microammeter
Negative pole interface is electrically connected with, and the anode interface of described first high voltage microammeter electrically connects with the described middle joint flange nearest away from upper joint
Connecing, the negative pole interface of described 3rd high voltage microammeter is electrically connected with the lower joint flange of high-voltage arrester, and described 3rd high pressure is micro-
The anode interface ground connection of peace table, the negative pole interface of described second high voltage microammeter be connected to described in dam umbrella, described second high pressure
The anode interface ground connection of microampere meter, described grading ring ground connection.
Save Leakage Current method of testing on a kind of high-voltage arrester, the umbrella that dams be located on the insulation sleeve of high-voltage arrester,
The described umbrella that dams is located at described high-voltage arrester between middle joint flange and the grading ring of described high-voltage arrester that upper joint is nearest；
The negative pole interface of high voltage direct current generator and the first high voltage microammeter is electrically connected with, pitch on described high-voltage arrester
Nearest middle joint flange is electrically connected with the anode interface of described first high voltage microammeter, the negative pole interface of the second high voltage microammeter
Being electrically connected with the described umbrella that dams, the anode interface ground connection of described second high voltage microammeter, the negative pole of the 3rd high voltage microammeter connects
Mouthful with the electric connection of the lower joint flange of described high-voltage arrester, the anode interface ground connection of described 3rd high voltage microammeter, described all
Pressure ring ground connection；
Described high voltage direct current generator pressurizes, and obtains described first high voltage microammeter, described second high voltage microammeter respectively
And the current values of described 3rd high voltage microammeter；
The current values that described first high voltage microammeter records is individually subtracted described second high voltage microammeter and described the
The current values that three high voltage microammeters record, obtains the upper joint Leakage Current of described high-voltage arrester.
There is advantages that
Save testing device for current leakage on high-voltage arrester to be installed on spark gap by the umbrella that dams on the insulation sleeve of joint, measure
The electric current that the stray capacitance caused by grading ring on umbrella of damming is formed, this electric current is numerically equal to disturb electric current, subsequently
Deduct the numerical value of electric current when experimental data is processed, just can obtain the data of leakage current more accurately, dam umbrella with
Spark gap removably connects, easy to use, decreases the workload measuring work.
Save leakage current testing method on high-voltage arrester the past interference electric current in joint on spark gap to be changed by shielding
In order to measure, abandon a series of programs required for shielding interference electric current, enormously simplify test job, the umbrella that simultaneously dams is surveyed
The electric current of amount is equal to the interference electric current in joint on high-voltage arrester, and on the spark gap that relatively shielding mode records, current numerical value is more accurate
Really.
Accompanying drawing explanation
Fig. 1 is to save Leakage Current test device installation diagram on high-voltage arrester；
Fig. 2 is the umbrella structural representation that dams；
Fig. 3 is the umbrella side structure schematic diagram that dams；
Fig. 4 is the first fracture generalized section；
Fig. 5 is the second fracture partial cutaway schematic.
Description of reference numerals:
100, dam umbrella, and 110, internal ring, 120, outer shroud, 130, rod member, 140, metal wire, 150, fixture, 200, leakage
Testing current assembly, 210, high voltage direct current generator, the 220, first high voltage microammeter, the 230, second high voltage microammeter, 240,
Three high voltage microammeters, 300, grading ring, 400, high-voltage arrester.
Detailed description of the invention
Embodiments of the invention are described in detail by connection with figures below.
The present embodiment is using 500kV spark gap as test object, but saves testing device for current leakage also on high-voltage arrester
It is equally applicable to other high-voltage arresters.
As it is shown in figure 1, save testing device for current leakage on 500kV spark gap 400 to include dam umbrella 100 and leakage current survey
Examination assembly 200, the umbrella 100 that dams is electrically connected with leakage current testing assembly 200, and the umbrella 100 that dams can with 500kV spark gap 400
Dismounting connects, and equal away from the nearest middle joint flange of upper joint and 500kV spark gap 400 of 500kV spark gap 400 be located at by the umbrella 100 that dams
Between pressure ring 300, the umbrella 100 that dams is located on the insulation sleeve of 500kV spark gap 400.Grading ring 300 can average 500kV spark gap
400 surrounding voltages, protection 500kV spark gap 400 is the most breakdown, but simultaneously saves it on grading ring 300 and 500kV spark gap 400
Between can form stray capacitance, stray capacitance formed in 500kV spark gap 400 interference electric current, impact in joint leakage current test
Result, mislead for the judgement of 500kV spark gap 400 state, and the umbrella 100 that dams be by forming capacitive junctions with grading ring 300
Structure, can measure the current values formed equally on the umbrella 100 that dams by stray capacitance, and this electric current is numerically near with interference electric current
Seemingly, so the interference of the interference electric current caused by grading ring 300 can be rejected in follow-up Measurement and Data Processing.
As in figure 2 it is shown, dam, umbrella 100 includes internal ring 110, outer shroud 120 and rod member 130, and internal ring 110 all overlaps with outer shroud 120
Outside 500kV spark gap 400, internal ring 110 internal diameter is less than described outer shroud 130, and internal ring 110 is located on insulation sleeve, and internal ring 110 is with outer
Ring 120 is connected by rod member, is also associated with metal wire 140 between internal ring 110 and outer shroud 120, and metal wire 140 act as water conservancy diversion,
The voltage everywhere that makes to dam on umbrella 100 is consistent.
As it is shown on figure 3, outer shroud 120 is provided with the first fracture and the second fracture, outer shroud 120 is at the first fracture and the second fracture
Place disconnects, and as shown in Figure 4, the first fracture two ends are hinged, as it is shown in figure 5, the second fracture two ends are detachably connected by fixture 150
Connecing, internal ring 110 is being provided with the 3rd fracture and the 4th fracture with the first fracture, the second fracture corresponding position.The test preparatory stage,
The fixture 150 of the second fracture is pulled down, opens the umbrella 100 that dams, two parts of internal ring 110 are connected to 500kV respectively and take shelter from the thunder
In the groove of device 400 insulation sleeve, then close up two parts of the umbrella 100 that dams, utilize fixture 150 to fix the two ends of the second fracture.
As it is shown in figure 1, outer shroud 120 is located at grading ring 300 and between the middle joint flange that upper joint is nearest, outer shroud 120 internal diameter
Not less than the internal diameter of grading ring 300, with the measured current values caused by stray capacitance on this umbrella 100 that ensures to dam with
On 500kV spark gap 400, the internal interference current values caused by stray capacitance of joint is close.
Owing to damming, umbrella 100 produces electric current, so internal ring 110, outer shroud 120 are equal with rod member 130 by sensing stray capacitance
For conductive material.
When carrying out leakage current testing, high voltage direct current generator 210 stresses on the middle joint method nearest away from upper joint by wire
Lan Shang, therefore for prevent from damming umbrella 100 and between the middle joint flange that upper joint is nearest due to too high pressure reduction generation electrion,
The creepage distance of insulation at arbitrary position and the middle joint flange nearest away from upper joint on umbrella 100 of damming is all higher than 80cm.
Owing to this experiment uses negative polarity d. c electricity, therefore as it is shown in figure 1, high voltage direct current generator 210 and first
The negative pole interface of high voltage microammeter 220 is connected by wire, the anode interface of the first high voltage microammeter 220 by wire be located at away from
Nearest middle joint flange, the negative pole interface of the 3rd high voltage microammeter 240 and 500kV spark gap is saved on 500kV spark gap 400
The lower joint Flange joint of 400, the anode interface of the 3rd high voltage microammeter 240 pass through wired earth, the second high voltage microammeter 230
Negative pole interface is connected to the umbrella 100 that dams, and the anode interface of the second high voltage microammeter 230 passes through wired earth, described grading ring 300
Pass through wired earth.
The step saving leakage current testing method on 500kV spark gap 400 is:
First, by damming, umbrella 100 is located on the insulation sleeve of 500kV spark gap 400, and the umbrella 100 that dams is located at institute 500kV and is taken shelter from the thunder
Device 400 is between middle joint flange and the grading ring 300 of 500kV spark gap 400 that upper joint is nearest；
Secondly, the negative of Leakage Current test suite 200, high voltage direct current generator 210 and the first high voltage microammeter 220 is connected
Pole interface is electrically connected with, and the anode interface of the first high voltage microammeter 220 is electrically connected with the middle joint flange nearest away from upper joint, and second
The negative pole interface of high voltage microammeter 230 is connected to the umbrella 100 that dams, the anode interface ground connection of the second high voltage microammeter 230, three-hypers
The negative pole interface of pressure microampere meter 240 and the lower joint Flange joint of 500kV spark gap 400, the positive pole of the 3rd high voltage microammeter 240 connects
Mouth ground connection, grading ring 300 ground connection；
Then, pressurizeed by high voltage direct current generator 210, obtain first high voltage microammeter the 220, second high pressure microampere respectively
Table 230 and the current values of the 3rd high voltage microammeter 240；
Finally, the current values that the first high voltage microammeter 220 records is individually subtracted the second high pressure microampere 230 table and the 3rd
The current values that high voltage microammeter 240 records, obtains the upper joint Leakage Current of 500kV spark gap 400.
Measured by described first high voltage microammeter 220 is total current I in circuit1, described 3rd high voltage microammeter 240 institute
That record is the Leakage Current I passed through in the spark gap in addition to upper joint3, measured by the second high voltage microammeter 230 is described section
The electric current I formed by stray capacitance on stream umbrella 1002, its numerical value is formed by stray capacitance in joint equal on 500kV spark gap 400
Interference electric current, described first high voltage microammeter 220 record numerical value and deduct described second high voltage microammeter 230 with the described 3rd
Numerical value measured by high voltage microammeter 240, i.e. I=I1-I2-I3, the leakage current of joint on available 500kV spark gap 400.
As a example by leakage current testing under 0.75 times of DC reference voltage, right first with high voltage direct current generator 210
Circuit persistent pressure, when the reading of the first high voltage microammeter 220 reaches 1mA, record voltage U now1mA, blood pressure lowering subsequently is also
Calculate 0.75U1mAValue, be forced into 0.75U again with high voltage direct current generator 2101mA, record the most each high voltage microammeter
Reading, and utilize above-mentioned computing formula I=I1-I2-I3Draw on 500kV spark gap 400 leakage current of joint, by with standard
Comparing understands the insulation situation of 500kV spark gap 400.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, not to above-mentioned reality
The all possible combination of each technical characteristic executed in example is all described, but, as long as the combination of these technical characteristics is not deposited
In contradiction, all it is considered to be the scope that this specification is recorded.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but also
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that, come for those of ordinary skill in the art
Saying, without departing from the inventive concept of the premise, it is also possible to make some deformation and improvement, these broadly fall into the protection of the present invention
Scope.Therefore, the protection domain of this practicality invention should be as the criterion with claims.
Claims (8)
1. save testing device for current leakage on a high-voltage arrester, it is characterised in that include dam umbrella and leakage current testing
Assembly, described in dam umbrella and described Leakage Current test suite be electrically connected with, described in the umbrella that dams detachably connect with high-voltage arrester
Connect, described in dam umbrella be located at the described high-voltage arrester grading ring away from the nearest middle joint flange of upper joint and described high-voltage arrester it
Between, described in the umbrella that dams be located on the insulation sleeve of described high-voltage arrester.
Save testing device for current leakage on high-voltage arrester the most according to claim 1, it is characterised in that described in dam umbrella
Including internal ring, outer shroud and rod member, described internal ring and described outer shroud are all placed on outside described high-voltage arrester, and described internal ring internal diameter is less than
Described outer shroud, described in be located on described insulation sleeve, described internal ring is connected by described rod member with described outer shroud, described internal ring
And it is also associated with metal wire between described outer shroud.
Testing device for current leakage is saved, it is characterised in that on described outer shroud on high-voltage arrester the most according to claim 2
Being provided with the first fracture and the second fracture, described outer shroud disconnects with described second incision position at described first fracture, and described first breaks
Mouthful two ends are hinged, and described second fracture two ends are removably connected by fixture, described internal ring with described first fracture, described
Second fracture corresponding position is provided with the 3rd fracture and the 4th fracture.
Testing device for current leakage is saved, it is characterised in that described outer shroud sets on high-voltage arrester the most according to claim 2
Between described grading ring and the described middle joint flange nearest away from upper joint, described bore diameter of outer ring is interior not less than described grading ring
Footpath.
Testing device for current leakage is saved on high-voltage arrester the most according to claim 2, it is characterised in that described internal ring,
Outer shroud and rod member are conductive material.
Save testing device for current leakage on high-voltage arrester the most according to claim 2, it is characterised in that described in dam umbrella
Upper arbitrary position is all higher than 80cm with the creepage distance of insulation of the described middle joint flange nearest away from upper joint.
7. according to saving testing device for current leakage on the high-voltage arrester described in any one of claim 1-6, it is characterised in that institute
State Leakage Current test suite and include high voltage direct current generator, the first high voltage microammeter, the second high voltage microammeter and the 3rd high pressure
Microampere meter, described high voltage direct current generator is electrically connected with the negative pole interface of described first high voltage microammeter, described first high pressure
The anode interface of microampere meter is electrically connected with the described middle joint flange nearest away from upper joint, and the negative pole of described 3rd high voltage microammeter connects
Mouth is electrically connected with the lower joint flange of high-voltage arrester, the anode interface ground connection of described 3rd high voltage microammeter, and described second is high
The negative pole interface of pressure microampere meter dams umbrella described in being connected to, the anode interface ground connection of described second high voltage microammeter, described all presses
Ring ground connection.
8. on a high-voltage arrester, save Leakage Current method of testing, it is characterised in that
The umbrella that dams is located on the insulation sleeve of high-voltage arrester, described in dam that to be located at described high-voltage arrester nearest away from upper joint for umbrella
Between middle joint flange and the grading ring of described high-voltage arrester；
The negative pole interface of high voltage direct current generator and the first high voltage microammeter is electrically connected with, and on described high-voltage arrester, pitch is nearest
The anode interface of middle joint flange and described first high voltage microammeter be electrically connected with, the negative pole interface of the second high voltage microammeter and institute
State dam umbrella be electrically connected with, the anode interface ground connection of described second high voltage microammeter, the negative pole interface of the 3rd high voltage microammeter with
The lower joint flange of described high-voltage arrester is electrically connected with, the anode interface ground connection of described 3rd high voltage microammeter, described grading ring
Ground connection；
Described high voltage direct current generator pressurizes, and obtains described first high voltage microammeter, described second high voltage microammeter and institute respectively
State the current values of the 3rd high voltage microammeter；
The current values that described first high voltage microammeter records is individually subtracted described second high voltage microammeter and described three-hypers
The current values that pressure microampere meter records, obtains the upper joint Leakage Current of described high-voltage arrester.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610716573.3A CN106249098B (en) | 2016-08-24 | 2016-08-24 | Device and method for testing upper section leakage current of high-voltage lightning arrester |
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| CN201610716573.3A CN106249098B (en) | 2016-08-24 | 2016-08-24 | Device and method for testing upper section leakage current of high-voltage lightning arrester |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107167698A (en) * | 2017-07-20 | 2017-09-15 | 云南电网有限责任公司电力科学研究院 | A kind of leakage current of an arrester live testing device and method |
| CN107329032A (en) * | 2017-07-20 | 2017-11-07 | 北京送变电公司 | Arrester direct current leakage test device |
| CN109870598A (en) * | 2019-03-28 | 2019-06-11 | 国家电网有限公司 | A kind of arrester Leakage Current test connection system and test method |
| CN111257604A (en) * | 2020-04-09 | 2020-06-09 | 国家电网有限公司 | Upper section test wiring device for 500kV and above voltage level lightning arrester |
| CN112066516A (en) * | 2020-08-03 | 2020-12-11 | 珠海格力电器股份有限公司 | Air conditioner, fault self-diagnosis method, external unit positioning fault method and remote controller |
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| CN111257604A (en) * | 2020-04-09 | 2020-06-09 | 国家电网有限公司 | Upper section test wiring device for 500kV and above voltage level lightning arrester |
| CN112066516A (en) * | 2020-08-03 | 2020-12-11 | 珠海格力电器股份有限公司 | Air conditioner, fault self-diagnosis method, external unit positioning fault method and remote controller |
| CN112066516B (en) * | 2020-08-03 | 2021-08-20 | 珠海格力电器股份有限公司 | Air conditioner, fault self-diagnosis method, external unit positioning fault method and remote controller |
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