CN109254234A - A kind of trees-wire electrical discharge simulation experiment method - Google Patents
A kind of trees-wire electrical discharge simulation experiment method Download PDFInfo
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- CN109254234A CN109254234A CN201811396520.3A CN201811396520A CN109254234A CN 109254234 A CN109254234 A CN 109254234A CN 201811396520 A CN201811396520 A CN 201811396520A CN 109254234 A CN109254234 A CN 109254234A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004088 simulation Methods 0.000 title claims abstract description 16
- 238000012360 testing method Methods 0.000 claims abstract description 47
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 9
- 230000008859 change Effects 0.000 claims abstract description 6
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 238000010998 test method Methods 0.000 claims description 6
- 238000005259 measurement Methods 0.000 abstract description 7
- 230000009467 reduction Effects 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 8
- 238000012806 monitoring device Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 241001310793 Podium Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000803 paradoxical effect Effects 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a kind of trees-wire electrical discharge simulation experiment methods: analog conducting wire being suspended on arm of crane, is grounded after the matching connection impedance of analog conducting wire both ends；High Frequency Current Sensor is installed in analog conducting wire one end, and High Frequency Current Sensor is exported and is connected on acquisition terminal by coaxial cable；Test tree is arranged on insulating stand, at the top of test tree between analog conducting wire at a distance from be 0.1-0.4m；High pressure is applied to test tree bottom end by conducting wire by high-voltage test electric power, high-voltage test electric power voltage is output to acquisition terminal by divider；It gradually rises high-voltage test electric power and applies voltage U, or reduce distance d, until test tree discharges to analog conducting wire, the acquired terminal acquisition of discharge current, acquisition terminal monitors and records discharging time voltage；Change and apply voltage U, clearance distance d, trees in practical transmission line of electricity-wire electrical discharge process can be simulated.The design of the invention is scientific and reasonable, and test is accurate, and accurate measurements and the reduction of discharge current is better achieved.
Description
Technical field
The present invention relates to a kind of discharge test method more particularly to a kind of trees-wire electrical discharge simulation experiment methods.
Background technique
The tripping of transmission line of electricity caused by trees is referred to as " trees failure ", abbreviation screen of trees.Screen of trees be easy to cause line outage,
It endangers very big.Operating experience shows that screen of trees can undergo the pre-arcing process of long period before formation, and electric discharge can produce on conducting wire
Raw high frequency transient pulse, and propagated along point of discharge to route two sides.Grasp trees-wire electrical discharge rule, for accurate measurements this
Kind paradoxical discharge phenomenon realizes electric discharge early warning, avoids the generation of trees failure, improves transmission line of electricity power supply reliability with important
Meaning.
The acquisition of flash-over characteristic rule depends on laboratory simulation test, the relevant report of the simulation test of screen of trees pre-arcing at present
Road is more rare, in the document that can be found, only to tree in " transmission line of electricity trees Fault Mechanism Analysis and experimental study " text
Barrier pre-arcing simulation test has carried out associated description, which applies high pressure on analog conducting wire, and trees are placed in ground, to simulation
Apply different voltages on conducting wire, and change distance between trees and conducting wire, simulates practical transmission line of electricity screen of trees pre-arcing and tree
The forming process of barrier.There are significant defects for this test method, first is that applying high pressure on analog conducting wire, can not implement to conducting wire
Impedance matching, discharge current occur complicated catadioptric at analog conducting wire both ends, it is special can not to extract discharging time primary current waveform
Sign；Second is that applying high voltage power supply on analog conducting wire, discharge current acquisition terminal need to be placed on analog conducting wire, be highly prone to height
Piezoelectricity magnetic disturbance, in addition, acquisition terminal uses battery power supply mode, is limited to power consumption, equipment so that measurement result is inaccurate
Performance is difficult to meet the monitoring of this high-frequency discharge of pre-arcing.
Summary of the invention
The technical problem to be solved by the present invention is to overcome defect described above, provide a kind of trees-wire electrical discharge simulation
Test method, design is scientific and reasonable, can eliminate catadioptric interference, and test result is accurate, is consistent with actual conditions, can be preferably real
The accurate measurements of existing discharge current and reduction.
In order to solve the problems, such as techniques described above, trees of the present invention-wire electrical discharge simulation experiment method, by including
Analog conducting wire, test tree, High Frequency Current Sensor, acquisition terminal, divider and high-voltage test electric power device complete jointly, institute
State test method the following steps are included:
1) analog conducting wire is suspended on the boom of crane using insulating cord, after the both ends matching connection impedance of the analog conducting wire
Ground connection；
2) High Frequency Current Sensor is installed on the line of described analog conducting wire one end, High Frequency Current Sensor output is passed through coaxial
In cable connection to acquisition terminal；
3) test tree be arranged on height-adjustable insulating supporting platform, make the test tree top and the analog conducting wire it
Between distance d be 0.1-0.4m；High pressure is applied to the bottom end of the test tree by high-voltage test electric power by conducting wire, meanwhile,
The high-voltage test electric power voltage is output on the acquisition terminal after passing through a divider；
4) it gradually rises the high-voltage test electric power and applies voltage U, or reduce the top of the test tree and described simulate is led
The distance between line d, until test tree discharges to the analog conducting wire, discharge current passes through High Frequency Current Sensor acquired end
End acquisition, meanwhile, the acquisition terminal monitors and records discharging time voltage；Change and applies voltage U, clearance distance d, Ji Kemo
Draw up trees in practical transmission line of electricity-wire electrical discharge process.
Further, the step 1) of the method for the invention, the wave resistance of the resistance value of the matching impedance and the analog conducting wire
Resist equal.
The present invention will test instrument (referred to High Frequency Current Sensor and acquisition terminal) and be mounted on low-pressure side, avoid height
The possibility that instrument is damaged in pressure side, is conducive to the safe operation of monitoring device；Low-pressure side installation can save battery link, to dress
Directly power supply is set (to supply by the low-pressure side acquisition system that 220V alternating current forms High Frequency Current Sensor and acquisition terminal
Electricity) stability that system is run can be improved.
Test tree is placed on an insulated platform by the present invention, applies high pressure, treetop certain distance model in trees bottom
Interior placement analog conducting wire is enclosed, simulation both ends pass through matching impedance.Ground connection, eliminates catadioptric of the discharge current on analog conducting wire
Process really simulates the discharge process between practical transmission line of electricity trees and conducting wire, in addition, installing on analog conducting wire high
Performance high frequency current tester device, it can be achieved that discharge current accurate measurements and reduction.
Beneficial effects of the present invention:
1) analog conducting wire both ends are grounded by matching impedance, are eliminated catadioptric interference, are consistent with actual conditions；
2) analog conducting wire current potential is low potential, and monitoring device is installed on analog conducting wire, alternating current can be used and be powered, therefore can
Using high sampling rate, wide band high-performance monitoring device, accurate measurements and the reduction of discharge current are realized.
Detailed description of the invention
Fig. 1 is trees of the present invention-wire electrical discharge pilot system schematic diagram.
In figure, 1- analog conducting wire；2- matching impedance；3- High Frequency Current Sensor；4- acquisition terminal；5- divider；6- work
Frequency experiment power supply；7- test tree；8- insulating supporting platform.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and examples.
Trees of the present invention-wire electrical discharge simulation experiment method, by including analog conducting wire, test tree, high-frequency current
Sensor, acquisition terminal, divider and high-voltage test electric power device complete jointly, the test method the following steps are included:
1) analog conducting wire 1 is suspended on the boom of crane using insulating cord, the both ends matching connection impedance of the analog conducting wire 1
It is grounded after 2；
2) High Frequency Current Sensor 3 is installed on the line of described 1 one end of analog conducting wire, High Frequency Current Sensor output is passed through same
Shaft cable is connected on acquisition terminal 4；
3) test tree 7 is arranged on height-adjustable insulating supporting platform 8, leads the top of the test tree 7 with the simulation
The distance between line 1 d is 0.1-0.4m；High pressure is applied to the bottom of the test tree 7 by high-voltage test electric power 6 by conducting wire
End, meanwhile, 6 voltage of high-voltage test electric power is output on the acquisition terminal 4 after passing through a divider 5；
4) it gradually rises the high-voltage test electric power 6 and applies voltage U, or top and the simulation of the reduction test tree 7
The distance between conducting wire 1 d, until test tree 7 discharges to the analog conducting wire 1, discharge current is passed through by High Frequency Current Sensor 3
Acquisition terminal 4 acquires, meanwhile, the acquisition terminal 4 monitors and records discharging time voltage；Change and applies voltage U, clearance distance
D can simulate trees in practical transmission line of electricity-wire electrical discharge process.
Further, the step 1) of the method for the invention, the wave resistance of the resistance value of the matching impedance and the analog conducting wire
Resist equal.
Embodiment: experimental rig method of the present invention is as follows:
1) shown arrangement test, analog conducting wire 1 can be hung by crane, analog conducting wire hanged using insulating cord referring to Fig.1
It hangs on the boom of crane, both ends are grounded by matching impedance 2, and matching impedance resistance value should be equal with analog conducting wire wave impedance.
Impedance matching of the present invention, i.e. matching are worth equal noninductive resistance with analog conducting wire wave impedance, prevent electric discharge electricity
The point catadioptric in impedance discontinuity is flowed, measurement is caused relatively large deviation occur.
2) a High Frequency Current Sensor 3(is installed on the line of 1 one end of analog conducting wire and is such as used for partial discharge monitoring HFCT biography
Sensor), High Frequency Current Sensor is exported, acquisition terminal 4(such as oscillograph are connected to by coaxial cable) on.
3) test tree 7 is common tree, is acquisition time not long and not air-dried tree, tree is placed in a height can
On the insulating supporting platform 8 of tune, distance d between the i.e. controllable trees top of podium level and analog conducting wire is adjusted, this is apart from root
It is changed according to the difference of the applied voltage class of industrial frequency experiment power supply, influence factor is more (such as ambient humidity), general to simulate
10kV --- the route of 110kV voltage class, this distance take 0.1m --- 0.4m.High-voltage test electric power 6 will by conducting wire
High pressure is applied to trees bottom end, and at the same time, high-potting source voltage is output on acquisition terminal 4 after passing through a divider 5.
4) it gradually rises and applies voltage U, or reduce clearance distance d, until trees, to wire electrical discharge, discharge current passes through
The acquisition of the acquired terminal 4 of High Frequency Current Sensor 3, at the same time, acquisition terminal 4 monitors and records discharging time voltage；Change
Apply voltage U, trees-wire electrical discharge process in the practical transmission line of electricity of clearance distance d, i.e. analog.
Claims (2)
1. a kind of trees-wire electrical discharge simulation experiment method, which is characterized in that the method is by including analog conducting wire, test
Tree, High Frequency Current Sensor, acquisition terminal, divider and high-voltage test electric power device complete jointly, the test method packet
Include following steps:
1) analog conducting wire (1) is suspended on the boom of crane using insulating cord, the both ends matching connection of the analog conducting wire (1)
Impedance (2) is grounded afterwards；
2) High Frequency Current Sensor (3) are installed on the line of described analog conducting wire (1) one end, High Frequency Current Sensor are exported logical
Coaxial cable is crossed to be connected on acquisition terminal (4)；
3) test tree (7) be arranged on height-adjustable insulating supporting platform (8), make the top of the test tree (7) with it is described
The distance between analog conducting wire (1) d is 0.1-0.4m；High pressure is applied to the examination by conducting wire by high-voltage test electric power (6)
The bottom end of tree (7) is tested, meanwhile, high-voltage test electric power (6) voltage is output to the acquisition terminal after passing through a divider (5)
(4) on；
4) high-voltage test electric power (6) are gradually risen and apply voltage U, or reduce the top of the test tree (7) with it is described
The distance between analog conducting wire (1) d, until test tree (7) discharge to the analog conducting wire (1), discharge current passes through high-frequency electrical
Flow sensor (3) acquired terminal (4) acquisition, meanwhile, the acquisition terminal (4) monitors and records discharging time voltage；Change
Apply voltage U, clearance distance d, trees in practical transmission line of electricity-wire electrical discharge process can be simulated.
2. trees-wire electrical discharge simulation experiment method according to claim 1, which is characterized in that the step 1), described
Resistance value with impedance is equal with the wave impedance of the analog conducting wire.
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| CN201811396520.3A CN109254234A (en) | 2018-11-22 | 2018-11-22 | A kind of trees-wire electrical discharge simulation experiment method |
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| CN201811396520.3A CN109254234A (en) | 2018-11-22 | 2018-11-22 | A kind of trees-wire electrical discharge simulation experiment method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108995A (en) * | 2019-06-11 | 2019-08-09 | 云南电网有限责任公司电力科学研究院 | Varied clearance arc discharge experimental provision |
| CN110927528A (en) * | 2019-12-12 | 2020-03-27 | 广西电网有限责任公司电力科学研究院 | Transmission line fault simulation test device |
| CN111426916A (en) * | 2020-05-14 | 2020-07-17 | 昆明理工大学 | Grounding electrode line fault simulation method and system |
| CN112904159A (en) * | 2021-01-20 | 2021-06-04 | 中国商用飞机有限责任公司 | Deposition static ground test method and system |
| CN114355112A (en) * | 2022-03-22 | 2022-04-15 | 智联新能电力科技有限公司 | Transient fault and defect discharge fault simulation test platform and data analysis method |
| CN114675132A (en) * | 2022-03-31 | 2022-06-28 | 云南电网有限责任公司电力科学研究院 | Tree line fault identification method, simulation device, system, computer device and medium |
| CN115113092A (en) * | 2022-03-31 | 2022-09-27 | 云南电网有限责任公司电力科学研究院 | Tree line early fault feature extraction method, live-action simulation equipment, system, computer equipment and medium |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108995A (en) * | 2019-06-11 | 2019-08-09 | 云南电网有限责任公司电力科学研究院 | Varied clearance arc discharge experimental provision |
| CN110927528A (en) * | 2019-12-12 | 2020-03-27 | 广西电网有限责任公司电力科学研究院 | Transmission line fault simulation test device |
| CN111426916A (en) * | 2020-05-14 | 2020-07-17 | 昆明理工大学 | Grounding electrode line fault simulation method and system |
| CN111426916B (en) * | 2020-05-14 | 2021-06-25 | 昆明理工大学 | Grounding electrode line fault simulation method and system |
| CN112904159A (en) * | 2021-01-20 | 2021-06-04 | 中国商用飞机有限责任公司 | Deposition static ground test method and system |
| CN114355112A (en) * | 2022-03-22 | 2022-04-15 | 智联新能电力科技有限公司 | Transient fault and defect discharge fault simulation test platform and data analysis method |
| CN114675132A (en) * | 2022-03-31 | 2022-06-28 | 云南电网有限责任公司电力科学研究院 | Tree line fault identification method, simulation device, system, computer device and medium |
| CN115113092A (en) * | 2022-03-31 | 2022-09-27 | 云南电网有限责任公司电力科学研究院 | Tree line early fault feature extraction method, live-action simulation equipment, system, computer equipment and medium |
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