CN107552361A - Gas-insulated transmission line tank body and the method for suppressing its interior particle movement - Google Patents
Gas-insulated transmission line tank body and the method for suppressing its interior particle movement Download PDFInfo
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- CN107552361A CN107552361A CN201710668028.6A CN201710668028A CN107552361A CN 107552361 A CN107552361 A CN 107552361A CN 201710668028 A CN201710668028 A CN 201710668028A CN 107552361 A CN107552361 A CN 107552361A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The invention provides gas-insulated transmission line tank body and suppress the method for its interior particle movement.The suppressing method comprises the following steps：Coating to be painted is sprayed into default area to be sprayed in pending gas-insulated transmission line inner tank wall；The coating to be painted sprayed in above-mentioned steps is subjected to curing process.In the present invention, the coating sprayed in gas-insulated transmission line inner tank wall is by hindering particulate in gas-insulated transmission line tank body directly to contact the powered approach of conduction with electrode, effectively reduce charge particles lotus amount, the electric-field intensity needed for lifting that opens of particulate is added simultaneously, so as to suppress motion of the electrically conductive particles in gas-insulated transmission line tank body；Meanwhile this method does not change the body construction of gas-insulated transmission line tank body, easy making process, securely and reliably.
Description
Technical field
The present invention relates to power system transmission line technical field, in particular to a kind of gas-insulated transmission line
Tank body and the method for suppressing its interior particle movement.
Background technology
Because gas-insulated transmission line (Gas-insulated transmission line, GIL) has transmission capacity
Greatly, the advantages that security reliability is high, service life is long, floor space is small, at present, overhead transmission line difficulty is big, expropriation of land is tired building
The particular surroundings occasion such as difficulty is widely used, while as the following extensive, development trend of high-tension transmission.But
It is that GIL is inevitably mixed into some electrically conductive particles, by electric field in GIL during production, transport, installation and operation
Under power effect, particulate can be moved so that local field strength is distorted in GIL, in some instances it may even be possible to cause GIL built-in electrical insulations to puncture
Accident.
At present, charged particle is caught using the method for the setting particulate trap in GIL mostly, installed near insulating part
Particulate trap, the electrically conductive particles moved in GIL are caught, somewhat change GIL Electric Field Distribution so that particulate is made in electric field
With in lower immigration trap.
China Patent Publication No.：CN 105149096A, disclose a kind of metal for Gas Insulated HVDC Transmission Line
Particulate trap, it is caught groove two parts and formed by driveing electrode and metal particle；Direct current GIL aluminium alloy conductors and direct current GIL
It is exhausted positioned at direct current GIL pillars on direct current GIL aluminium alloy conductors with pillar insulator inside direct current GIL aluminum alloy casings
Electrode is driven in installation near edge, catches groove in direct current GIL cavitys inner bottom part installation metal particle so that drive electrode incline
Metal particle facing to bottom catches groove, and metal particle catches groove and is divided into 3 layers, is from bottom to top concave metallic shield successively
Groove, epoxy resins insulation pad, strong sticky PUR coating；Metal particle catches groove and is used for catching and limiting particulate, in the bottom
Female metallic shield groove produces existing fringing field area, and intermediate layer epoxy resins insulation pad is overlying on whole concave metallic shield trench bottom,
Sticky PUR coating can realize control and capture to high-speed motion particulate by force for the superiors.
Metal particle catcher in above-mentioned technical proposal fails to suppress particulate in itself to open act, exists certain random
Property, it is impossible to realize the thorough removing of particulate.Simultaneously as this method changes GIL internal structures, brought to equipment fabrication design
Inconvenience, the introducing of particulate trap may cause internal field in GIL uneven, or even bring negative effect.
The content of the invention
In consideration of it, the present invention proposes a kind of gas-insulated transmission line tank body and suppresses the method for its interior particle movement,
Aim to solve the problem that in existing method in gas-insulated transmission line the problem of particle movement.
On one side, the present invention proposes a kind of method for suppressing particle movement in gas-insulated transmission line, the suppression
Method comprises the following steps：Coating to be painted is sprayed into default to be sprayed in pending gas-insulated transmission line inner tank wall
Region；The coating to be painted sprayed in above-mentioned steps is subjected to curing process.
Further, in above-mentioned suppression gas-insulated transmission line particle movement method, coating to be painted is sprayed into and treated
In processing gas insulated power circuit inner tank wall before default area to be sprayed, the suppressing method also comprises the following steps：
The pending gas-insulated transmission line inner tank wall is surface-treated and drying and processing.
Further, in above-mentioned suppression gas-insulated transmission line particle movement method, be sprayed into by coating to be painted
In pending gas-insulated transmission line inner tank wall before default area to be sprayed, the suppressing method also includes following step
Suddenly：Surface in the pending gas-insulated transmission line inner tank wall without spraying is carried out to cover protection processing.
Further, in above-mentioned suppression gas-insulated transmission line particle movement method, after the curing process,
The suppressing method also comprises the following steps：Secondary instrument is carried out to the gas-insulated transmission line inner tank wall after paint solidification
Face is handled.
Further, in above-mentioned suppression gas-insulated transmission line particle movement method, the default area to be sprayed
Domain is 120 ° of sector regions and is arranged at the inwall of the pending gas-insulated transmission line tank base.
Further, in above-mentioned suppression gas-insulated transmission line particle movement method, the coating to be painted includes：Wash
Synthetic fibre resin particle, filler and curing agent.
Further, in above-mentioned suppression gas-insulated transmission line particle movement method, the gas insulation electric power line
The coating coating thickness that road inner tank wall sprays the coating to be sprayed is 100 μm.
Further, in above-mentioned suppression gas-insulated transmission line particle movement method, the area to be sprayed and institute
State and be spaced pre-determined distance between the insulator in pending gas-insulated transmission line tank body.
Further, in above-mentioned suppression gas-insulated transmission line particle movement method, in coating spraying process, lead to
Spray gun is crossed to be sprayed by the way of airless spraying.
Further, in above-mentioned suppression gas-insulated transmission line particle movement method, the spray gun and the gas
The setting at an acute angle of insulated power circuit tank body.
Further, in above-mentioned suppression gas-insulated transmission line particle movement method, the spray pressure of the spray gun
For 10MPa, the coating flow of the spray gun is 1 liter/min, and the coating material temperature of the spray gun is 70 DEG C, and spray time is
150ms。
Further, in above-mentioned suppression gas-insulated transmission line particle movement method, during curing process, lead to
Overheat curing oven or/and uv oven carries out curing process, hardening time 20-30s.
The method of particle movement, coating to be sprayed is sprayed into suppression gas-insulated transmission line provided by the invention
In GIL inner tank walls, and by curing process by paint solidification to prevent the loss of coating and uneven.
Especially, the coating sprayed in the present invention in gas-insulated transmission line inner tank wall is by hindering in GIL tank bodies
Particulate directly contacts with electrode conducts powered approach, effectively reduces charge particles lotus amount, while add opening for particulate
Electric-field intensity needed for lifting, so as to suppress motion of the electrically conductive particles in GIL tank bodies；Meanwhile this method does not change GIL tank bodies
Body construction, easy making process, securely and reliably.
On the other hand, the present invention proposes a kind of gas-insulated transmission line tank body, and the tank body includes：Tank body body；If
The sprayed coating of the tank body inner body wall is placed in, it is suppressing particle movement in the tank body body.
Further, above-mentioned gas insulated power circuit tank body, the sprayed coating are coated on the tank body inner body wall bottom
On 120 ° of sector regions in portion.
Gas-insulated transmission line tank body provided by the invention, by coating sprayed coating in tank body body by hindering gas
Particulate directly contacts with electrode in body insulated power circuit tank body conducts powered approach, effectively reduces charge particles lotus
Amount, while the electric-field intensity needed for lifting that opens of particulate is added, so as to suppress electrically conductive particles in gas-insulated transmission line tank body
Interior motion.
Brief description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this area
Technical staff will be clear understanding.Accompanying drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And in whole accompanying drawing, identical part is denoted by the same reference numerals.In the accompanying drawings：
Fig. 1 is the flow signal of the method for particle movement in suppression gas-insulated transmission line provided in an embodiment of the present invention
Figure；
Fig. 2 is the another flow of the method for particle movement in suppression gas-insulated transmission line provided in an embodiment of the present invention
Schematic diagram；
Fig. 3 is the main structure diagram of gas-insulated transmission line tank body provided in an embodiment of the present invention；
Fig. 4 is the side structure schematic view of gas-insulated transmission line tank body provided in an embodiment of the present invention；
Fig. 5 provides the stream for the method for judging gas-insulated transmission line sprayed coating particle movement state for the embodiment of the present invention
Journey schematic diagram；
Fig. 6 provides the knot for the device for judging gas-insulated transmission line sprayed coating particle movement state for the embodiment of the present invention
Structure block diagram.
Embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although the disclosure is shown in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
Limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.It should be noted that in the case where not conflicting, embodiment in the present invention and
Feature in embodiment can be mutually combined.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Suppressing method embodiment：
Referring to Fig. 1, it is the method for particle movement in suppression gas-insulated transmission line provided in an embodiment of the present invention
Schematic flow sheet.This method may include steps of：
Tank body cleaning step S1, by pending gas-insulated transmission line inner tank wall be surface-treated and drying at
Reason.
Specifically, first, by way of washing or Chemical cleaning mode in pending GIL tank bodies inwall carry out
Cleaning treatment；Then, the inwall of pending GIL tank bodies is removed by electrostatic precipitation and the mechanical treatment mode such as ball blast
The processing such as dirt and oil removing；Finally, pending GIL tank bodies are positioned in dryer and carry out drying and processing, to ensure GIL tank bodies
The cleanliness factor of inwall, so as to ensure the quality of sprayed coating in GIL tank bodies, sprayed coating is improved to particulate in pending GIL tank bodies
The actual effect of inhibitory action.To those skilled in the art, quiet pad dedusting or mechanical treatment can be used wherein to appoint tank body cleaning
One mode, no matter dust removal operation or removal operation are that the spray painting of following tank surfaces is pre-processed, to improve spraying
Effect.
Spray coating covering step S2, treat the surface in processing gas insulated power circuit inner tank wall without spraying and hidden
Lid protection is handled.
Specifically, covering protection is carried out without the surface of spraying to the inwall of pending GIL tank bodies, avoided because to be painted
The excessive powder for applying region surface descends slowly and lightly and is attached on the surface not sprayed or the coating of spray gun descends slowly and lightly and is attached in spraying process
On the surface not sprayed, so as to avoid having dirt on the surface that GIL inner tank walls do not spray；It will be appreciated by those skilled in the art that
, to without spraying surface can carry out artificial overlay film, paster or masking tape, after spraying, can manually membrane removal, tear patch
Paper or masking tape.
Wherein, tank body cleaning step S1 and spray coating covering step S2 do not have sequencing, meanwhile, if can ensure to spray
Coating is sprayed into the surface without spraying by Shi Buhui, then need not carry out spray coating covering step S2.
Spraying process S3, coating to be painted is sprayed into default to be painted in pending gas-insulated transmission line inner tank wall
Apply region.
Specifically, first, pending gas-insulated transmission line inner tank wall chooses default area to be sprayed；So
Afterwards, pending gas-insulated transmission line tank body is positioned over calm dustless spraying space；Finally, high pressure is used by spray gun
Coating to be sprayed is sprayed on default area to be sprayed by the mode of airless spraying, in spraying process, for ease of the equal of coating
Even distribution, spray gun can be in 25 ° of settings with pending GIL tank bodies 1, and the spray pressure of spray gun, coating flow and spray time
It can be determined according to the area of actual conditions such as coating thickness and area to be sprayed；Charged particle is generally fallen under GIL tank bodies
Half portion, to influence the operation of GIL tank body inner insulators when preventing that the dope layer after spraying is subsequently powered and ensuring that charged particle is equal
Fall and be placed on default area to be sprayed, can choose the bottoms of pending GIL inner tank walls with it is exhausted in pending GIL tank bodies
20cm or so 120 ° of sector regions are spaced between edge as area to be sprayed；If pending GIL inner tank walls spraying
The sector region that the coating thickness of coating to be sprayed is 100 μm and area to be sprayed is 120 °, the spray pressure of spray gun, apply stream
Amount and spray time can be respectively 10MPa, 1LPM (liter/min) and 150ms.
Curing schedule S4, the coating to be painted sprayed in spraying process S3 is subjected to curing process.
Specifically, pending GIL tank bodies can be entered the coating to be painted sprayed in spraying process S3 by heat cure stove
Row curing process, it can also be combined by uv oven progress curing process or heat cure stove and uv oven and be consolidated
Change；First, the temperature adjusted in curing oven is increased to preset temperature, and the solidification energy of uv oven is adjusted into 1700-
2000mJ；Then, spraying process S3 is sprayed to the pending GIL tank bodies after coating to be sprayed to place in curing oven；Finally, open
Curing oven carries out curing process by curing oven to pending GIL tank bodies so that the sprayed coating solidification of GIL inner tank walls, to keep away
Exempt from the loss of coating or the cracking of sprayed coating, hardening time can be 20-30s.
What is provided in the present embodiment suppresses the method for particle movement in gas-insulated transmission line, and coating to be sprayed is sprayed
To GIL inner tank walls, and by curing process by paint solidification to prevent the loss of coating and uneven.
Specifically, in the present embodiment, the coating sprayed in gas-insulated transmission line inner tank wall is by hindering GIL tanks
Internal particulate directly contacts with electrode, and then hinders and conduct powered approach between the two, effectively reduces charge particles
Lotus amount, the electric-field intensity needed for lifting that opens of particulate is added, so as to suppress motion of the electrically conductive particles in GIL tank bodies；Meanwhile should
Method does not change the body construction of GIL tank bodies, easy making process, securely and reliably.
Referring to Fig. 2, it is the method for particle movement in suppression gas-insulated transmission line provided in an embodiment of the present invention
Another schematic flow sheet, this method also comprise the following steps after curing schedule S4：
After-treatment step S5, secondary instrument is carried out to the pending gas-insulated transmission line inner tank wall after paint solidification
Face is handled.
Specifically, the side of Chemical cleaning can be passed through in curing schedule S4 after paint solidification processing procedure
Formula for example carries out secondary cleaning processing by alcohol to pending GIL inner tank walls.
Obviously it is achieved that, can be by GIL tank bodies by the secondary surface treatment after paint solidification in the present embodiment
The dirt that inwall is formed in spraying process is cleared up, and prevents dirt from influenceing GIL operation.
In the various embodiments described above, coating to be painted can include：Polyester resin (Polyethylene
Terephthalate, PET) particle, filler and curing agent.
Specifically, PET solids can be by obtaining PET particles after being fully ground；PET particle diameters can be according to reality
Situation determines, for ease of the spraying of coating, PET particle diameters can be less than 10 μm；To improve the cementability of coating to be painted, fill out
Material can be epoxy resin.
It will be readily appreciated that the PET particles that coating to be painted contains in the present embodiment can improve the attachment of the coating
Power, curing agent can improve the curing efficiency of the coating, and then prevent the accumulation of coating to avoid the uneven distribution of coating.
What is provided in the present embodiment suppresses the method for particle movement in gas-insulated transmission line, and coating to be sprayed is sprayed
To GIL inner tank walls, and by curing process by paint solidification to prevent the loss of coating and uneven.
Specifically, in the present embodiment, the coating sprayed in gas-insulated transmission line inner tank wall is by hindering GIL tanks
Internal particulate directly contacts with electrode, and then hinders and conduct powered approach between the two, effectively reduces charge particles
Lotus amount, the electric-field intensity needed for lifting that opens of particulate is added, so as to suppress motion of the electrically conductive particles in GIL tank bodies；Meanwhile should
Method does not change the body construction of GIL tank bodies, easy making process, securely and reliably.
Tank body embodiment：
Referring to Fig. 3 and Fig. 4, the gas-insulated transmission line tank body includes：Tank body body 1 and sprayed coating 2；Wherein, spray
Layer 2 is arranged on the inwall of tank body body 1, and it is suppressing the motion of particulate in tank body body 1.
Specifically, it is therefore prevented that the accumulation of sprayed coating 2 and the uneven distribution of sprayed coating 2, sprayed coating 2 can be PET
The coating that solid can be mixed by obtaining PET particles, epoxy resin and curing agent after being fully ground is sprayed into tank body sheet
Formed on the inwall of body 1；Wherein, the thickness of sprayed coating 2 can be 100 μm；Sprayed coating 2 is coated on the inwall bottom of tank body body 1
On 120 ° of sector regions in portion, sprayed coating 2 can be by way of spray gun uses airless spraying by PET particles, asphalt mixtures modified by epoxy resin
The coating that fat and curing agent mix is sprayed into the coating formed on the default spraying area of the bottom of the inwall of tank body body 1
Layer；To influence the operation of GIL tank body inner insulators when preventing that the dope layer after spraying is subsequently powered and ensuring that charged particle falls
It is placed on default area to be sprayed, it is 120 ° of sector regions to preset spraying area.
The gas-insulated transmission line tank body provided in the present embodiment is logical by the sprayed coating 2 of the coating in tank body body 1
Cross and hinder particulate in gas-insulated transmission line tank body directly to contact the powered approach of conduction with electrode, effectively reduce particulate
Electrically charged amount, while the electric-field intensity needed for lifting that opens of particulate is added, so as to suppress electrically conductive particles in gas insulation electric power line
Motion in the tank body of road.
It should be noted that due to gas-insulated transmission line tank body and the principle phase of suppressing method in the present embodiment
Together, related part can be with cross-referenced.
The spraying of GIL inner tank wall coating have changed the distribution of GIL tank body electric fields, especially GIL inner tank walls sprayed coating
The distribution of the electric field of interface, therefore, the judgement when judgement that whether particulate moves in GIL tank bodies is different from not spraying are now right
It is explained in detail.
Determination methods embodiment：
Referring to Fig. 5, it is the side provided in an embodiment of the present invention for judging gas-insulated transmission line sprayed coating particle movement
The schematic flow sheet of method, the determination methods comprise the following steps：
Electron avalanche judgment step S100, judge whether electron avalanche starts to increase according to the electric-field intensity between sprayed coating and particulate
It is long.
Specifically, first, the electric-field intensity E in GIL tank bodies between sprayed coating and particulate is calculated by calculus；So
Afterwards, analysis is compared according to the electric-field intensity E of calculating, judges whether electron avalanche starts to increase, when electric-field intensity E increases to foot
It is enough big, meet that electron avalanche advances condition α-η>When 0, electron avalanche starts to increase, wherein, α SF6The electricity of Townsend first of gas
From coefficient；η is SF6The attachment coefficient of gas.
Discharge judgment step S200, when electron avalanche starts to increase, calculates electron avalanche head charge number, and sentence according to this value
It is disconnected whether shelf depreciation to occur between sprayed coating and particulate.
Specifically, when electron avalanche judgment step S100 judged results are that electron avalanche starts to increase, then electron avalanche head
Charge number Ne starts to increase, and first, calculates electron avalanche head charge number Ne；Then, judged according to electron avalanche head charge number Ne
Whether shelf depreciation occurs between sprayed coating and particulate, when electron avalanche head charge number Ne increase to the development of electron avalanche it is default
Value, meets gas ionization condition Ne>During K, shelf depreciation occurs between sprayed coating and particulate；Wherein, K SF6The gas of gas
Discharge constant, K=10.5.Between sprayed coating and particulate occur shelf depreciation while, particulate then start it is powered, sprayed coating with it is micro-
The electric-field intensity that the initial time of shelf depreciation occurs between grain is set as the starting field strength Ep of shelf depreciation；If sprayed coating with
When shelf depreciation does not occur between particulate, the quantity of electric charge of particulate is 0.
Motion determination step S300, when shelf depreciation occurs between sprayed coating and particulate, according to sprayed coating and particulate it
Between electric field force judge whether particulate moves.
Specifically, if electric discharge judgment step S200 judged results are：Shelf depreciation occurs between sprayed coating and particulate
That is charge particles, first, the electric field force F of particulate is calculated according to the Maxwell's stress M between sprayed coating and particulateC；Then, root
According to the electric field force F of calculatingCJudge whether particulate moves.If the electric field force F between the sprayed coating and particulate that calculateCMore than particulate
Gravity G be FC>G, then particulate open act motion take place.
The judgement provided in the present embodiment is provided with the side of the particle movement state in sprayed coating gas-insulated transmission line
Method, the growth of electron avalanche is judged by the result of calculation of the electric-field intensity between sprayed coating and particulate, pass through electron avalanche head electricity
Lotus number judges the shelf depreciation between sprayed coating and particulate, and the motion of particulate is judged by the electric field force between sprayed coating and particulate
State.
Specifically, by being provided with sprayed coating and particulate in the gas-insulated transmission line of sprayed coating in the present embodiment
The calculating and judgement of three related parameters, when only three parameters are satisfied by condition, are provided with the gas-insulated of sprayed coating
Particulate in transmission line of electricity just meets the condition of motion, and judgment mode is simple and convenient, can in time recognize and be provided with sprayed coating
The motion state of particulate in gas-insulated transmission line, to examine whether gas-insulated transmission line sprayed coating conforms to
Ask, so as to prevent the generation of GIL built-in electrical insulation breakdown accidents.
Specifically, in electron avalanche judgment step S100, the calculation formula of the electric-field intensity E between sprayed coating and particulate
Can be：
Wherein,Potential difference between sprayed coating and particulate, z are the distance between sprayed coating and particulate, and z=0 is particulate
Positioned at the bottom of sprayed coating, z=d is located at the top of sprayed coating, V for particulate0For the potential of sprayed coating top end, D1nFor sprayed coating
The dielectric displacement arrow normal component of gas side, E at surface-boundary1tFor tangential point of the dielectric displacement arrow of sprayed coating surface boundary gas side
Amount, D2nNormal component is sweared for the dielectric displacement of sprayed coating surface boundary film side；Specifically, if sprayed coating particulate and spraying
Shelf depreciation occurs between layer, sprayed coating is equivalent to coated electrode.
It will be readily appreciated that point of the electric-field intensity in GIL tank bodies is have changed after GIL inner tank walls painting brush applied coating
Cloth so that the boundary condition at GIL tank body undercoating is changed, and is passed through the analysis to sprayed coating boundary condition in the present embodiment and is calculated
The calculating of sprayed coating particulate surrounding electric field intensity, calculate accurate quick.
Specifically, in the judgment step S200 that discharges, electron avalanche head charge number Ne can pass through Calculate and obtain, when meeting α=η between sprayed coating and particulate, wherein, α SF6Gas
The ionization coefficient of Townsend first, η SF6The attachment coefficient of gas, electron avalanche head charge number Ne calculation formula are：
Wherein, e is elementary charge, e=-1.62 × 10-19C, i are calculation times, riThe head of electron avalanche is calculated for ith
Radius, DiThe diffusion coefficient of the electronics calculated for ith, TiTime, V are formed for the electron avalanche that ith calculateseiFor ith meter
The electron drift velocity of calculation, EiIth calculate electric-field intensity, p be gas pressure, xiFor TiCharged particle is with applying in time
The position on electron avalanche head, Ne during interlayer shelf depreciationiThe head charge number of the electron avalanche calculated for ith, Nei,i+1For i-th
The electron avalanche head charge number increment coefficient of secondary calculating；ESCiSpace charge field caused by the electronics calculated for ith, Ei＇ i-th
It is secondary to calculate the electric-field intensity calculated according to space charge, ε0For permittivity of vacuum, εrFor the dielectric constant of sprayed coating.
It will be readily appreciated that when meeting certain condition by the outermost layer border of particulate in the present embodiment, according to upper
State calculus and calculate electron avalanche head charge number so that the calculating of electron avalanche head charge number is accurate, so as to accurate judgement particulate
Whether shelf depreciation occurs between sprayed coating.
Specifically, in motion determination step S300, the electric field force F between sprayed coating and particulate is calculatedCCalculating it is public
Formula is：
FC=∫ΓMdS,
Wherein, surface Maxwell's stresses of the M between sprayed coating and particulate.
What is provided in the present embodiment judges the method for gas-insulated transmission line sprayed coating particle movement state, passes through spraying
The result of calculation of electric-field intensity between layer and particulate judges the growth of electron avalanche, judges to spray by electron avalanche head charge number
Shelf depreciation between layer and particulate, the motion state of particulate is judged by the electric field force between sprayed coating and particulate.
Specifically, by being provided with sprayed coating and particulate in the gas-insulated transmission line of sprayed coating in the present embodiment
The calculating and judgement of three related parameters, when only three parameters are satisfied by condition, are provided with the gas-insulated of sprayed coating
Particulate in transmission line of electricity just meets the condition of motion, and judgment mode is simple and convenient, can in time recognize and be provided with sprayed coating
The motion state of particulate in gas-insulated transmission line, to examine whether gas-insulated transmission line sprayed coating conforms to
Ask, so as to prevent the generation of GIL built-in electrical insulation breakdown accidents.
Judgment means embodiment：
Referring to Fig. 6, it is provided for the embodiment of the present invention judges gas-insulated transmission line sprayed coating particle movement state
The structured flowchart of device, the judgment means include：Electron avalanche judge module 100, electric discharge judge module 200 and motion determination module
300；Wherein, electron avalanche judge module 100 is used to judge whether electron avalanche is opened according to the electric-field intensity between sprayed coating and particulate
Begin to increase；Electric discharge judge module 200 is used to, when electron avalanche starts to increase, calculate electron avalanche head charge number, and according to this value
Judge whether shelf depreciation occurs between sprayed coating and particulate；Motion determination module 300 is used for when particulate and sprays interlayer
During shelf depreciation, judge whether particulate moves according to the electric field force between sprayed coating and particulate.Wherein, electron avalanche judges mould
The specific implementation process of block 100, electric discharge judge module 200 and motion determination module 300 is referring to above method embodiment, sheet
Embodiment will not be repeated here.
Specifically, electron avalanche judge module 100 is specifically used for the electric-field strength being calculated as follows between sprayed coating and particulate
Spend E：
Wherein,Current potential between sprayed coating and particulate, z are the distance between sprayed coating and particulate, and z=0 is particulate
Positioned at the bottom of sprayed coating, z=d is located at the top of sprayed coating, V for particulate0For the potential of sprayed coating top end, D1nFor sprayed coating
The dielectric displacement arrow normal component of gas side, E at surface-boundary1tFor tangential point of the dielectric displacement arrow of sprayed coating surface boundary gas side
Amount, D2nNormal component is sweared for the dielectric displacement of sprayed coating surface boundary film side.
Further, if electron avalanche judge module 100 is specifically used for meeting between the sprayed coating and the particulate：α-η>
0, then judge that electron avalanche starts to increase；
Wherein, α SF6The ionization coefficient of Townsend first of gas, η SF6The attachment coefficient of gas.
Further, electron avalanche head charge number Ne：
Wherein, α SF6The ionization coefficient of Townsend first of gas, η SF6The attachment coefficient of gas.
Further, when the electron avalanche judge module meets α=η specifically for the outermost layer border of sprayed coating particulate,
Electron avalanche head charge number Ne is calculated as follows：
Wherein, e is elementary charge, e=-1.62 × 10-19C, i are calculation times, riThe head of electron avalanche is calculated for ith
Radius, DiThe diffusion coefficient of the electronics calculated for ith, TiTime, V are formed for the electron avalanche that ith calculateseiFor ith meter
The electron drift velocity of calculation, EiIth calculate electric-field intensity, p be gas pressure, xiFor TiCharged particle is with applying in time
The position on electron avalanche head, Ne during interlayer shelf depreciationiThe head charge number of the electron avalanche calculated for ith, Nei,i+1For i-th
The electron avalanche head charge number increment coefficient of secondary calculating；ESCiSpace charge field caused by the electronics calculated for ith, Ei＇ i-th
It is secondary to calculate the electric-field intensity calculated according to space charge, ε0For permittivity of vacuum, εrFor the dielectric constant of sprayed coating.
Further, if electric discharge judge module 200 meets gas ionization bar specifically for electron avalanche head charge number Ne
Part：Ne>K, then judge shelf depreciation occurs between particulate and sprayed coating；
Wherein, K SF6The gas discharge constant of gas, K=10.5.
Further, discharge the electric field force F that judge module 300 is specifically used for being calculated as follows between sprayed coating and particulateC：
FC=∫ΓMdS,
Wherein, surface Maxwell's stresses of the M between sprayed coating and particulate.
Further, if motion determination module 300 is specifically used for the electric field force F between sprayed coating and particulateCMeet FC>
G, then judge that particulate opens act motion；Wherein, G is the gravity of particulate.
Because determination methods embodiment has the effect above, so the judgment means embodiment also has corresponding technology effect
Fruit.
Acquisition GIL sprayed coating particulates, which can be calculated, according to the determination methods provided in the present embodiment opens act field strength and bare electrode
Lower particulate opens act field strength, by the contrast of both and coated electrode region difference pressure specifically such as table 1, it can be seen that GIL
After tank body uses coating, opening needed for electrically conductive particles is lifted field strength and is significantly increased in GIL, is advantageous to suppression particulate and occurs in GIL
Motion, electrically conductive particles can be suppressed in GIL tank bodies by again demonstrating the coating sprayed in gas-insulated transmission line inner tank wall
Interior motion.
Particulate opens act field intensity set in the GIL of table 1
It should be understood by those skilled in the art that, embodiments herein can be provided as method, system or computer program
Product.Therefore, the application can use the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Apply the form of example.Moreover, the application can use the computer for wherein including computer usable program code in one or more
The computer program production that usable storage medium is implemented on (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The application is with reference to the flow according to the method for the embodiment of the present application, equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram
Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processors of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, so as in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (14)
- A kind of 1. method for suppressing particle movement in gas-insulated transmission line, it is characterised in that comprise the following steps：Coating to be painted is sprayed into default area to be sprayed in pending gas-insulated transmission line inner tank wall；The coating to be painted sprayed in above-mentioned steps is subjected to curing process.
- 2. the method according to claim 1 for suppressing particle movement in gas-insulated transmission line, it is characterised in that will treat Spray paint is sprayed into pending gas-insulated transmission line inner tank wall before default area to be sprayed, in addition to following step Suddenly：The pending gas-insulated transmission line inner tank wall is surface-treated and drying and processing.
- 3. the method according to claim 1 for suppressing particle movement in gas-insulated transmission line, it is characterised in that inciting somebody to action Coating to be painted is sprayed into pending gas-insulated transmission line inner tank wall before default area to be sprayed, in addition to as follows Step：Surface in the pending gas-insulated transmission line inner tank wall without spraying is carried out to cover protection processing.
- 4. the method according to claim 1 for suppressing particle movement in gas-insulated transmission line, it is characterised in that in institute After stating curing process, also comprise the following steps：Secondary surface treatment is carried out to the gas-insulated transmission line inner tank wall after paint solidification.
- 5. the method according to claim 1 for suppressing particle movement in gas-insulated transmission line, it is characterised in that described Default area to be sprayed is 120 ° of sector regions and is arranged at the bottom of the pending gas-insulated transmission line inner tank wall Portion.
- 6. the method according to claim 1 for suppressing particle movement in gas-insulated transmission line, it is characterised in that described Coating to be painted includes：Polyester resin particle, filler and curing agent.
- 7. the method according to claim 1 for suppressing particle movement in gas-insulated transmission line, it is characterised in that described The coating that coating to be painted is sprayed into default area to be sprayed in pending gas-insulated transmission line inner tank wall sprays thickness Spend for 100 μm.
- 8. the method according to claim 1 for suppressing particle movement in gas-insulated transmission line, it is characterised in that described Pre-determined distance is spaced between insulator in area to be sprayed and the pending gas-insulated transmission line tank body.
- 9. the method according to claim 1 for suppressing particle movement in gas-insulated transmission line, it is characterised in that described Coating to be painted is sprayed into default area to be sprayed in pending gas-insulated transmission line inner tank wall, specifically included：It is logical Cross spray gun coating to be painted is sprayed into by the way of airless spraying in pending gas-insulated transmission line inner tank wall preset Area to be sprayed.
- 10. the method according to claim 9 for suppressing particle movement in gas-insulated transmission line, it is characterised in that institute State spray gun and the gas-insulated transmission line tank body setting at an acute angle.
- 11. the method according to claim 9 for suppressing particle movement in gas-insulated transmission line, it is characterised in that institute The spray pressure for stating spray gun is 10MPa, and the coating flow of the spray gun is 1 liter/min, and the coating material temperature of the spray gun is 70 DEG C, spray time 150ms.
- 12. the method according to claim 1 for suppressing particle movement in gas-insulated transmission line, it is characterised in that institute Curing process is stated to specifically include by heat cure stove or/and uv oven progress curing process, hardening time 20-30s.
- A kind of 13. gas-insulated transmission line tank body, it is characterised in that including：Tank body body；The sprayed coating of the tank body inner body wall is arranged at, it is suppressing the motion of particulate in the tank body body.
- 14. gas-insulated transmission line tank body according to claim 12, it is characterised in that the sprayed coating is coated on institute State on 120 ° of sector regions of tank body inner body wall bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710668028.6A CN107552361A (en) | 2017-08-07 | 2017-08-07 | Gas-insulated transmission line tank body and the method for suppressing its interior particle movement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710668028.6A CN107552361A (en) | 2017-08-07 | 2017-08-07 | Gas-insulated transmission line tank body and the method for suppressing its interior particle movement |
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| CN107552361A true CN107552361A (en) | 2018-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710668028.6A Pending CN107552361A (en) | 2017-08-07 | 2017-08-07 | Gas-insulated transmission line tank body and the method for suppressing its interior particle movement |
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| CN109530173A (en) * | 2018-11-28 | 2019-03-29 | 张家港康得新光电材料有限公司 | A kind of alignment liquid spraying method and spray equipment |
| CN110923708A (en) * | 2019-12-05 | 2020-03-27 | 华北电力大学 | Method for inhibiting metal particle movement in GIL |
| CN112670041A (en) * | 2020-11-20 | 2021-04-16 | 华北电力大学 | Ceramic post insulator assembly for gas insulated high voltage electrical equipment |
| CN114656859A (en) * | 2022-03-25 | 2022-06-24 | 国网江苏省电力有限公司电力科学研究院 | Method for inhibiting GIS free metal particles based on semi-conductive coating layer |
| CN116598861A (en) * | 2023-07-13 | 2023-08-15 | 西安交通大学 | Structure, insulating material and method for inhibiting metal particles |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109530173A (en) * | 2018-11-28 | 2019-03-29 | 张家港康得新光电材料有限公司 | A kind of alignment liquid spraying method and spray equipment |
| CN110923708A (en) * | 2019-12-05 | 2020-03-27 | 华北电力大学 | Method for inhibiting metal particle movement in GIL |
| CN112670041A (en) * | 2020-11-20 | 2021-04-16 | 华北电力大学 | Ceramic post insulator assembly for gas insulated high voltage electrical equipment |
| CN114656859A (en) * | 2022-03-25 | 2022-06-24 | 国网江苏省电力有限公司电力科学研究院 | Method for inhibiting GIS free metal particles based on semi-conductive coating layer |
| CN116598861A (en) * | 2023-07-13 | 2023-08-15 | 西安交通大学 | Structure, insulating material and method for inhibiting metal particles |
| CN116598861B (en) * | 2023-07-13 | 2023-10-20 | 西安交通大学 | Structure, insulating material and method for inhibiting metal particles |
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