CN109683073A - A kind of method of high voltage direct current pressure test electric discharge - Google Patents
A kind of method of high voltage direct current pressure test electric discharge Download PDFInfo
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- CN109683073A CN109683073A CN201910135651.4A CN201910135651A CN109683073A CN 109683073 A CN109683073 A CN 109683073A CN 201910135651 A CN201910135651 A CN 201910135651A CN 109683073 A CN109683073 A CN 109683073A
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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
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- Testing Relating To Insulation (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The present invention relates to a kind of methods of high voltage direct current pressure test electric discharge, one electric discharge device and a tested electrical equipment are provided, collect the parameter of the DC break down voltage test of tested electrical equipment first, and the discharge time t when test voltage for calculating tested electrical equipment is down to 1000V；Then electric discharge device is assembled, adjusts and carry out simulated operation, it is mobile to control sliding machine by operating stick, so that the guide rod that discharges is contacted with tested electrical equipment, and is discharged by discharge resistance；Finally, monitoring discharge current by discharge current detection module, and discharge current is set to reach preset value by adjusting discharge resistance value, when discharge current is 0, tested electrical equipment electric discharge terminates；The present invention can need quickly assembling adjustment according to scene, and safe operation is reliable, improves test efficiency.
Description
Technical field
The present invention relates to electrical engineering experimental technique field, especially a kind of method of high voltage direct current pressure test electric discharge.
Background technique
In electrical installation project, after direct current cables installation is complete, for the safe operation for guaranteeing system, it is necessary to before putting into operation
Commissioning test is carried out, wherein main project has the DC break down voltage of cable to test, it is that test test item insulation receiving is various excessively electric
The effective ways of pressure energy power, to guaranteeing that equipment safety operation is of great significance.
DC break down voltage test refers to: applying a direct current for being higher than the overvoltage numerical value being likely encountered in operation to test item
Pressure, and continue for some time, to check the dielectric level of equipment.The more preferable simulation test item of DC break down voltage test energy is in practical fortune
The case where voltage is born in row, can effectively find the local defect of some test items；Again since its wiring and operation are simpler
It is single, it is common pilot project.
Currently, mainly having for the mode discharged after electrical equipment DC break down voltage:
Method one: using special discharging rod, and low capacity, low-voltage discharge are applicable in, but discharges in high voltage, large capacity
It is influenced in test by different voltages grade and discharge capacity, and execute-in-place is difficult, discharge time is long, has certain safety hidden
Suffer from.
Method two: it first passes through after resitstance voltage divider is discharged to 70% test voltage and discharges through water resistance.
Analysis: by divider self discharge to 70% test voltage, water resistance resistance in electric discharge is unstable, heat capacity difference,
Resistance can not be adjusted with the variation of discharge voltage.Discharge time is long.
Method three: it first passes through resitstance voltage divider and is discharged to after 70% test voltage through moist wood or wet tree discharge.
Analysis: by divider self discharge to 70% test voltage, discharge time is long, and moist branch or wood are in electric discharge
Unstable, operational safety is poor.
Therefore, the method discharged after high voltage, large capacity subject electrical equipment DC break down voltage is furtherd investigate and is sought
The method for looking for solution has certain theory significance and realistic meaning.
According to practical engineering experience, the method discharged after being tested for the electrical equipment DC break down voltage of large capacity, high voltage,
Best bet is namely based on the impedance discharge technology of existing reliable performance, in conjunction with the various voltage class in scene and distinct device
Structure, develops a kind of simple and easy, and the electric discharge device of combined application can be needed according to scene, improve the safety of discharge test
Reliability greatly shortens discharge time, improves test efficiency.
Summary of the invention
In view of this, the purpose of the present invention is to propose to a kind of method of high voltage direct current pressure test electric discharge, it can be according to scene
It needs quickly to assemble adjustment, safe operation is reliable, improves test efficiency.
The present invention is realized using following scheme: a kind of method of high voltage direct current pressure test electric discharge provides an electric discharge dress
It sets and a tested electrical equipment, the electric discharge device includes discharge module, regulating device, slide trolley and described to place
The dragging track of slide trolley and the insulating bar to push the slide trolley to advance；In the detection control module
It is provided with discharge current detection module, the discharge current detection module is connect by conducting wire with the regulating device, to supervise
Survey discharge current；The slide trolley is loaded with the insulated telescopic rods that can vertically stretch；The discharge module is by several electric discharges
Resistance composes in series, and every group of discharge resistance passes through conducting wire and connect with the regulating device；The regulating device is also distant with outside
Motor is controlled to be connected；The insulated telescopic rods are equipped with the electric discharge guide rod that can rotate, the electric discharge guide rod pass through conducting wire with it is described
Regulating device connection；The tested electrical equipment includes high voltage direct current generator and is arranged on the high voltage direct current generator
High voltage direct current generator grading ring；Test lead is provided on the high voltage direct current generator grading ring；
The charging method of above-mentioned electric discharge device the following steps are included:
Step S1: the DC break down voltage value of tested electrical equipment is provided, the capacitance C of tested electrical equipment, is tested
The test voltage U of electrical equipmentfWith discharge capacity WC；
Step S2: according to the test voltage U of tested electrical equipmentfWith discharge capacity WCIt calculates from described tested electrical
The test voltage U of equipmentfIt is down to discharge time t when 1000V；Discharge time passes through formulaIt calculates；Wherein, UCIndicate that the voltage on tested electrical equipment, R indicate discharge resistance；
Step S3: assembling electric discharge device, adjustment and simulated operation；
Step S4: after the tested electrical equipment DC break down voltage, by operating described in the insulating bar promotion
Slide trolley advances, and contact the electric discharge guide rod with the high voltage direct current generator grading ring, and passes through impedance discharge
Start to discharge；
Step S5: monitoring discharge current by the discharge current detection module in discharge process, is filled by controlling to adjust
The size for setting adjustment impedance discharge, so that discharge current reaches preset value, discharge current
Step S6: it when the residual voltage on the tested electrical equipment is lower than 1000V, is then directly shorted by ground connection
Electric discharge；When discharge current is 0, the electric discharge of the tested electrical equipment terminates.
Further, the resistance value of every group of discharge resistance can adjust.
Further, every group of discharge resistance is by several electric discharges being bolted on a rosette
Resistor coupled in parallel composition.
Further, simulated operation described in step S3 specifically:
It is connected between the regulating device and the electric discharge guide rod with conducting wire；Adjust height and the institute of the insulated telescopic rods
State high voltage direct current generator grading ring height is consistent and the screw that is tightened, the angle for adjusting the electric discharge guide rod can be with institute
The contact of high voltage direct current generator grading ring is stated, guide rail and the slide trolley of sliding is towards by the high voltage direct current generator side
To arranging, so that being slided by the insulating bar promotion slide trolley towards tested electrical equipment, sliding distance
Not less than the length of the insulated telescopic rods；After simulated operation, controls the slide trolley and the high direct voltage occurs
The distance of device is not less than the position of the insulating telescopic pole length.
Further, the insulating bar is the structure for being able to carry out horizontal extension.
Further, the regulating device is to be able to carry out vertically flexible insulation spiral supporting post, the insulation spiral branch
Short circuit sliding block is provided on column；The external remote control motor drives insulation spiral supporting post to be promoted and is shorted sliding block, is shorted different put
Resistance.
Compared with prior art, the invention has the following beneficial effects:
The present invention can need quickly assembling adjustment according to scene, and safe operation is reliable, greatly shortening discharge time, improve
Test efficiency.
Detailed description of the invention
Fig. 1 is the flow chart of the embodiment of the present invention.
Fig. 2 is the structural schematic diagram of the embodiment of the present invention.
Wherein, 1 is discharge resistance, and 2 be rosette, and 3 be earth stud, and 4 be fixed metal chassis, and 5 be conducting wire, and 6 are
Regulating device, 7 be discharge current detection module, and 8 be detection control module, and 9 be conducting wire, and 10 stretch for electric discharge guide rod, 11 for insulation
Contracting bar, 12 be fixed screw, and 13 be slide trolley, and 14 is slide guide rail, and 15 be insulating bar, and 16 be high voltage direct current generator
Grading ring, 17 be high voltage direct current generator, and 18 be test lead.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and embodiments.
As shown in Figure 1, a kind of method for present embodiments providing high voltage direct current pressure test electric discharge, provides an electric discharge dress
It sets and a tested electrical equipment, the electric discharge device includes discharge module, regulating device 6, slide trolley 13 and to place
The slide trolley slides guide rail 14 and the insulating bar 15 to push the slide trolley to advance；The detection control
Discharge current detection module 7 is provided on molding block 8, the discharge current detection module 7 passes through conducting wire and the regulating device 6
Connection, to monitor discharge current；The slide trolley is loaded with the insulated telescopic rods 11 that can vertically stretch；The electric discharge mould
Block is composed in series by several discharge resistances, and every group of discharge resistance passes through conducting wire 5 and connect with the regulating device 6；The adjusting
Device 6 is also connected with external remote control motor；The insulated telescopic rods 11 are equipped with the electric discharge guide rod 10 that can be rotated, the electric discharge
Guide rod 10 is connect by conducting wire 9 with the regulating device 6；The tested electrical equipment includes high voltage direct current generator 17 and sets
Set the high voltage direct current generator grading ring 16 on the high voltage direct current generator 17；The high voltage direct current generator grading ring 16
On be provided with test lead 18；
The charging method of above-mentioned electric discharge device the following steps are included:
Step S1: the DC break down voltage value of tested electrical equipment is provided, the capacitance C of tested electrical equipment, is tested
The test voltage U of electrical equipmentfWith discharge capacity WC；
Step S2: according to the test voltage U of tested electrical equipmentfWith discharge capacity WCIt calculates from described tested electrical
The test voltage U of equipmentfIt is down to discharge time t≤30min when 1000V；The condition for carrying out calculating satisfaction is electric discharge device
Test voltage U of the voltage rating not less than subject electrical equipmentf；Discharge time passes through formulaIt calculates；Wherein, UCIndicate that the voltage on subject electrical equipment, R indicate discharge resistance；
Step S3: assembling electric discharge device, adjustment and simulated operation；
Step S4: after the tested electrical equipment DC break down voltage, institute is pushed by operating the insulating bar 15
The advance of slide trolley 13 is stated, contact the electric discharge guide rod 10 with the high voltage direct current generator grading ring 16, and is passed through
Impedance discharge starts to discharge；
Step S5: monitoring discharge current by the discharge current detection module in discharge process, is filled by controlling to adjust
The size for setting adjustment impedance discharge, so that discharge current reaches preset value, discharge current
Step S6: it when the residual voltage on the tested electrical equipment is lower than 1000V, is then directly shorted by ground connection
Electric discharge；When discharge current is 0, the electric discharge of the tested electrical equipment terminates.
In the present embodiment, the resistance value of every group of discharge resistance can adjust.
In the present embodiment, every group of discharge resistance is several on a rosette 2 by being bolted on
Discharge resistance 1 composes in parallel.
In the present embodiment, simulated operation described in step S3 specifically:
In the present embodiment, the regulating device is to be able to carry out vertically flexible insulation spiral supporting post, the insulation spiral shell
Short circuit sliding block is provided on circumflex branch column；The external remote control motor drives insulation spiral supporting post to be promoted and is shorted sliding block, is shorted different
Discharge resistance.
Several discharge resistances 1 are fixed using bolt and rosette 2, electric discharge mould is composed in series with several discharge resistances
Block；Each disk on discharge module is connect with the adjusting contact of regulating device 6 to using conducting wire 5, is shorted sliding block and is adjusted to zero-bit
And be grounded, it is connected between the regulating device 6 and the electric discharge guide rod 10 with conducting wire 9；Adjust the adjustable insulated telescopic rods 11
Height is consistent with the height of the high voltage direct current generator grading ring 16 and the screw 12 that is tightened, adjust the electric discharge guide rod
10 angle can with 16 reliable contacts of high voltage direct current generator grading ring, it is described to slide guide rail 14 and the slide trolley
13 arrange towards by 17 direction of high voltage direct current generator, so that pushing the slide trolley by the insulating bar 15
It is reliably slided towards tested electrical equipment, slidably distance is not less than the length of the adjustable insulated telescopic rods；Simulated operation knot
It is long not less than the adjustable insulated telescopic rods at a distance from the high voltage direct current generator 17 to control the slide trolley 13 by Shu Hou
The position of degree.
In the present embodiment, the insulating bar is the structure for being able to carry out horizontal extension.
Preferably, the electric discharge device that the present embodiment is met the requirements according to the DC break down voltage parameter selection for being tested electrical equipment
Combination carries out assembling simulation before the test of tested electrical equipment DC break down voltage, and electric discharge device accesses quilt after DC break down voltage test
Examination electrical equipment discharges, and discharge resistance is adjusted by detection discharge current and voltage in engineering of discharging, so that discharge current
The rated value for keeping discharge resistance to be born, until the residual voltage near 0 on discharge current and tested electrical equipment, electric discharge
Terminate.
Particularly, the present embodiment specific embodiment includes the following steps:
(1) it collects the parameter of tested electrical equipment DC break down voltage test: being tested DC break down voltage value, the subject of electrical equipment
The capacitance C of equipment determines the test voltage U of tested electrical equipmentfAnd discharge capacity；
(2) according to the test voltage U for being tested electrical equipmentfWith discharge capacity WCCalculate meet condition discharge resistance R and
The class of insulation requirement of device, passes through formulaEstimate that discharge time t≤30min adjusts electric discharge if being unsatisfactory for
Resistance R；Scene can be adjusted with flexible assembling according to actual needs, optimize electric discharge device.
(3) electric discharge device assembly is carried out according to the result of calculating before tested electrical equipment DC break down voltage, according to Fig. 2 into
Row connection, adjusts and simulated operation, manipulation slide trolley 13 enable electric discharge guide rod 10 that can be abutted against with tested electrical equipment
Touching after simulation is qualified, exits slide trolley 13 and tested electrical equipment and pressurized equipment keeps safe distance；
(4) after tested electrical equipment DC break down voltage, the movement of slide trolley 13 is controlled by operation insulating bar 15, is made
The guide rod 10 that must discharge is contacted with tested electrical equipment, and starts to discharge by discharge resistance 1；
(5) according to monitoring discharge current in discharge process, the adjustment of adjustable resistance module is connect by external remote control motor control
The size of discharge resistance, so that discharge current reaches required value；
(6) when the residual voltage on tested electrical equipment is lower than 100V, electric discharge, electric discharge directly can be shorted by ground connection
When electric current is 0, the electric discharge of tested device terminates；
Electric discharge device can adjust 10 height of electric discharge guide rod and dielectric level by adjustable insulating guide rod 11, be allowed to adapt to tested
Try the electric discharge requirement of electrical equipment.Adjustable discharge resistance and discharge current detection device are set, and adjustable resistance is during discharge
Discharge current, which is allowed to, according to the electronic adjustment discharge resistance value of the progress of current value measured by discharge current detection device reaches maximum
Value shortens discharge time.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, is all covered by the present invention.
Claims (5)
1. a kind of method of high voltage direct current pressure test electric discharge, it is characterised in that: provide an electric discharge device and a tested electricity
Gas equipment, the electric discharge device include discharge module, regulating device, slide trolley and to place sliding for the slide trolley
Track and the insulating bar to push the slide trolley to advance；Discharge current is provided in the detection control module
Detection module, the discharge current detection module is connect by conducting wire with the regulating device, to monitor discharge current；It is described
Slide trolley is loaded with the insulated telescopic rods that can vertically stretch；The discharge module is composed in series by several groups discharge resistance,
Every group of discharge resistance passes through conducting wire and connect with the regulating device；The regulating device is also connected with external remote control motor；Institute
It states insulated telescopic rods and is equipped with the electric discharge guide rod that can be rotated, the electric discharge guide rod is connect by conducting wire with the regulating device；
The tested electrical equipment includes high voltage direct current generator and the high direct voltage being arranged on high voltage direct current generator hair
Raw device grading ring；Test lead is provided on the high voltage direct current generator grading ring；
The charging method of above-mentioned electric discharge device the following steps are included:
Step S1: the DC break down voltage value of tested electrical equipment is provided, the capacitance C of tested electrical equipment, is tested electrically
The test voltage U of equipmentfWith discharge capacity WC；
Step S2: according to the test voltage U of tested electrical equipmentfWith discharge capacity WCIt calculates from the tested electrical equipment
Test voltage UfIt is down to discharge time t when 1000V；Discharge time passes through formula
It calculates；Wherein, UCIndicate that the voltage on tested electrical equipment, R indicate resistance；
Step S3: assembling electric discharge device, adjustment and simulated operation；
Step S4: it after the tested electrical equipment DC break down voltage, is slided described in the insulating bar promotion by operating
Trolley advances, and contact the electric discharge guide rod with the high voltage direct current generator grading ring, and is started by discharge resistance
Electric discharge；
Step S5: discharge current is monitored by the discharge current detection module in discharge process, passes through controling adjustment device tune
The size of whole discharge resistance, so that discharge current reaches preset value, discharge current
Step S6: it when the residual voltage on the tested electrical equipment is lower than 1000V, is then directly put by being grounded to be shorted
Electricity；When discharge current is 0, the electric discharge of the tested electrical equipment terminates.
2. a kind of method of high voltage direct current pressure test electric discharge according to claim 1, it is characterised in that: described every group puts
Resistance is composed in parallel by several discharge resistances being bolted on a rosette.
3. a kind of method of high voltage direct current pressure test electric discharge according to claim 1, it is characterised in that: described in step S3
Simulated operation specifically:
It is connected between the regulating device and the electric discharge guide rod with conducting wire；Adjust the height of the insulated telescopic rods and described straight
Flow high pressure generator grading ring height is consistent and the screw that is tightened, adjust the electric discharge guide rod angle can with it is described straight
The contact of high pressure generator grading ring is flowed, guide rail and the slide trolley of sliding is towards by high voltage direct current generator direction cloth
It sets, so that pushing the slide trolley to slide towards tested electrical equipment by the insulating bar, sliding distance is not small
In the length of the insulated telescopic rods；After simulated operation, the slide trolley and the high voltage direct current generator are controlled
Distance is not less than the position of the insulating telescopic pole length.
4. a kind of method of high voltage direct current pressure test electric discharge according to claim 1, it is characterised in that: the insulation behaviour
It is the structure for being able to carry out horizontal extension as bar.
5. a kind of method of high voltage direct current pressure test electric discharge according to claim 1, it is characterised in that: the adjusting dress
It is set to and is able to carry out vertically flexible insulation spiral supporting post, be provided with short circuit sliding block on the insulation spiral supporting post；The outside
Remote-control motor drives insulation spiral supporting post to be promoted and is shorted sliding block, is shorted different discharge resistances.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910135651.4A CN109683073B (en) | 2019-02-21 | 2019-02-21 | High-voltage direct-current voltage withstand test discharging method |
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|---|---|---|---|
| CN201910135651.4A CN109683073B (en) | 2019-02-21 | 2019-02-21 | High-voltage direct-current voltage withstand test discharging method |
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| CN109683073A true CN109683073A (en) | 2019-04-26 |
| CN109683073B CN109683073B (en) | 2021-01-29 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110687405A (en) * | 2019-09-02 | 2020-01-14 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Discharging device and discharging method for direct-current withstand voltage test of seabed oil-filled cable |
| CN111308307A (en) * | 2020-03-13 | 2020-06-19 | 深圳供电局有限公司 | Instantaneous overcurrent capability detection system and method |
| CN112345893A (en) * | 2020-09-25 | 2021-02-09 | 国网浙江省电力有限公司舟山供电公司 | Large-capacity direct-current voltage withstand test platform with automatic discharge safety grounding device |
| CN113253068A (en) * | 2021-05-13 | 2021-08-13 | 江苏方天电力技术有限公司 | Discharging method after direct-current voltage withstand test of large-length high-voltage cable |
| CN113777446A (en) * | 2021-07-26 | 2021-12-10 | 国网浙江省电力有限公司营销服务中心 | Extra-high voltage withstand voltage tester with direct current charge-discharge state detection function and test method |
| CN114002567A (en) * | 2021-11-09 | 2022-02-01 | 广州思泰信息技术有限公司 | Rapid one-key test system and method for insulation performance |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110687405A (en) * | 2019-09-02 | 2020-01-14 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Discharging device and discharging method for direct-current withstand voltage test of seabed oil-filled cable |
| WO2021042601A1 (en) * | 2019-09-02 | 2021-03-11 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Discharge apparatus and discharge method for direct-current voltage withstand test of oil-filled submarine cable |
| CN111308307A (en) * | 2020-03-13 | 2020-06-19 | 深圳供电局有限公司 | Instantaneous overcurrent capability detection system and method |
| CN112345893A (en) * | 2020-09-25 | 2021-02-09 | 国网浙江省电力有限公司舟山供电公司 | Large-capacity direct-current voltage withstand test platform with automatic discharge safety grounding device |
| CN113253068A (en) * | 2021-05-13 | 2021-08-13 | 江苏方天电力技术有限公司 | Discharging method after direct-current voltage withstand test of large-length high-voltage cable |
| CN113777446A (en) * | 2021-07-26 | 2021-12-10 | 国网浙江省电力有限公司营销服务中心 | Extra-high voltage withstand voltage tester with direct current charge-discharge state detection function and test method |
| CN114002567A (en) * | 2021-11-09 | 2022-02-01 | 广州思泰信息技术有限公司 | Rapid one-key test system and method for insulation performance |
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| CN109683073B (en) | 2021-01-29 |
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