CN103618249B - ± 500kV common-tower double-return DC power transmission line hotline maintenance techniques - Google Patents
± 500kV common-tower double-return DC power transmission line hotline maintenance techniques Download PDFInfo
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- CN103618249B CN103618249B CN201310616162.3A CN201310616162A CN103618249B CN 103618249 B CN103618249 B CN 103618249B CN 201310616162 A CN201310616162 A CN 201310616162A CN 103618249 B CN103618249 B CN 103618249B
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- 238000000034 method Methods 0.000 title claims abstract description 80
- 238000012423 maintenance Methods 0.000 title claims abstract description 69
- 230000005540 biological transmission Effects 0.000 title claims abstract description 56
- 238000009413 insulation Methods 0.000 claims abstract description 23
- 238000012546 transfer Methods 0.000 claims abstract description 11
- 238000012216 screening Methods 0.000 claims abstract description 10
- 239000012212 insulator Substances 0.000 claims description 114
- 241001063191 Elops affinis Species 0.000 claims description 25
- 235000002756 Erythrina berteroana Nutrition 0.000 claims description 25
- HKPHPIREJKHECO-UHFFFAOYSA-N butachlor Chemical compound CCCCOCN(C(=O)CCl)C1=C(CC)C=CC=C1CC HKPHPIREJKHECO-UHFFFAOYSA-N 0.000 claims description 25
- 229910052573 porcelain Inorganic materials 0.000 claims description 24
- 239000012211 strain insulator Substances 0.000 claims description 24
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- 238000009434 installation Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000009194 climbing Effects 0.000 claims description 3
- 239000003063 flame retardant Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000011160 research Methods 0.000 description 17
- 238000013461 design Methods 0.000 description 8
- 230000005611 electricity Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 241000208140 Acer Species 0.000 description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 241000219780 Pueraria Species 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
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- 230000003068 static effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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Abstract
The present invention provides one kind ± 500kV common-tower double-return DC power transmission line hotline maintenance techniques, wherein enters equipotential operational method and comprises the following steps：Isoelectric level workman and ground potential workman carrying insulation transmission rope are stepped on tower and are fastened seat belts to earth wire support, and will insulate coaster and insulation transmission rope are arranged on operation earth wire support；Surfaceman's transmission insulated flexible ladder, insulated flexible ladder hanging head are to ground potential workman position；Ground potential workman removes the damper of working side aerial earth wire, and rope ladder hanging head is reliably arranged on aerial earth wire；After isoelectric level workman checks that the connection of screening clothing each several part is good, insulation protection rope is fastened, climb up insulated flexible ladder station good and seat belt is lain on insulated flexible ladder；Surfaceman swings insulated flexible ladder using insulated flexible ladder tail rope, quickly stretches out one's hand and hold wire and carry out potential transfer when isoelectric level workman is at live wire about 0.5m.± 500kV common-tower double-return DC power transmission line hotline maintenance the techniques of the present invention, have filled up the blank of domestic and international extra-high voltage direct-current hotline maintenance technology.
Description
【Technical field】
The present invention relates to ehv power transmission field, more particularly to one kind ± 500kV common-tower double-return DC power transmission line bands
Electric maintenance craft.
【Background technology】
Transmission line of electricity operation maintenance service work is the weight for grasping grid operating conditions, timely discovery and processing equipment defect
Means are wanted, the element task of line security stable operation is also to ensure that.As supergrid is in the operation of whole national grid
Core status are in, therefore the operating maintenance work of supergrid is for the super extra-high voltage grid of guarantee or even whole national grid
Safe and stable, reliability service tool be of great significance.
It is world's direct current that Pueraria lobota Shanghai direct current comprehensive reformation is ± 500kV Ge Nan lines (woods maple line) common-tower double-return DC transmission engineering
The Innovation project of technology of transmission of electricity development, is current country's outside bar common-tower double-return DC transmission engineering.The engineering is using former Pueraria lobota
Southern list loop line (capacity is 1200MW) path transform the work of double back ± 500kV increase-volume DC lines (capacity is 2 × 3000MW) as
Journey, is that State Grid Corporation of China implements sturdy power grid construction, implements the another key project of country's transferring electricity from the west to the east energy development strategy,
For further expansion Three Gorges and Sichuan Hydropower send scale, the electrical network for strengthening Central China with East China is got in touch with, and building national is hard
Forceful electric power net has positive effect.
± 500kV multiple-circuit on same tower is one brand-new operational mode of DC line, its line construction, window slot etc.
There is very big difference compared with other engineerings, especially tower structure, strain insulator porcelain rod insulator string assembling form there occurs very big
Change.Therefore, traditional operational method can not meet the needs of ± 500kV common-tower double-returns DC line maintenance.To such as carry out
Maintenance, livewire work, are the operational methods that must study a set of science, including operating type and operation technique flow process first.
The research of the maintenance of ± 500kV common-tower double-returns DC line, livewire work method and operation Work tool will be that we urgently solve at present
Problem certainly.The achievement in research of the problem will fill up China's ± 500kV common-tower double-returns DC power transmission line maintenance and livewire work
Work tool is developed and the practical technical blank of livewire work.To starting the maintenance of ± 500kV common-tower double-returns DC line, improve
Line maintenance efficiency, it is ensured that the health level of equipment plays huge effect.
【Content of the invention】
In view of this, for overcoming the deficiencies in the prior art, it is necessary to provide and a kind of be applied to ± 500kV common-tower double-return direct currents
The hotline maintenance technique of transmission line of electricity.
One kind ± 500kV common-tower double-return DC power transmission line hotline maintenance techniques, the hotline maintenance technique include entering
Equipotential operational method, the equipotential operational method of the entrance are comprised the following steps：Isoelectric level workman and ground potential workman
After finishing according to dressing specification wearing, carry insulation transmission rope and step on tower and fasten seat belts to earth wire support, will insulation coaster and
Insulation transmission rope is on operation earth wire support appropriate location；Surfaceman transmits insulated flexible ladder, installs rope ladder tricing line
Insulated flexible ladder hanging head to ground potential workman position；Ground potential workman removes the damper of working side aerial earth wire, then will be soft
Terraced hanging head is reliably arranged on aerial earth wire, and installs rope ladder hanging head tricing line；Isoelectric level workman checks that screening clothing each several part connects
Connect good after, fasten insulation protection rope, it is good and lie in seat belt on insulated flexible ladder to climb up insulated flexible ladder station, if strain rod tower
Then insulated flexible ladder is moved to the parallel place of strain clamp along aerial earth wire using rope ladder hanging head tricing line by ground potential workman, if straight line
Then insulated flexible ladder is moved about 5m outside aerial earth wire using rope ladder hanging head tricing line to shaft tower by ground potential workman, and isoelectric level workman is along absolutely
Edge rope ladder is descending, to shoulder concordant with upper sub-conductor when stop；Surfaceman swings insulated flexible ladder using insulated flexible ladder tail rope, etc.
Quickly stretch out one's hand when current potential workman is at live wire about 0.5m and hold wire and carry out potential transfer.
In at least one of which embodiment, enter in equipotential operational method described, isoelectric level workman enters electricity
Fasten seat belts behind position, and be necessary to determine whether to release insulation protection rope according to operation, isoelectric level workman checks screening clothing
After each several part connection is good, climb up insulated flexible ladder station good and seat belt is lain on insulated flexible ladder.
In at least one of which embodiment, the dressing specification includes, a complete set of shielding clothing of isoelectric level workman dress with
And fire-retardant underwear in shielding clothing, is worn, the shielding clothing includes shielding cap, shielding clothing, screening glove, screening socks, shielding footwear
And mask is shielded, ground potential workman must wear a complete set of electrostatic protective clothing and conductive shoeses.
In at least one of which embodiment, after the completion of hotline maintenance work, isoelectric level is exited according to following steps：Deng
After current potential workman checks that the connection of screening clothing each several part is good, insulated flexible ladder station is climbed up good and seat belt is lain in insulated flexible ladder
On；Isoelectric level workman unclamps wire and withdraws rapidly arm, and surfaceman swings insulated flexible ladder using insulated flexible ladder tail rope, etc.
Current potential workman exits isoelectric level；Ground is maked somebody a mere figurehead using insulated flexible ladder tricing line at earth wire support in insulated flexible ladder edge by ground potential workman
Line is moved at cross-arm, and isoelectric level workman unties the seat belt lain on insulated flexible ladder, and cross-arm is climbed up in climbing upwards, fastens safety
Band；Ground potential workman coordinates the whole instruments of dismounting with surfaceman, and recovers the installation of ground wire shockproof hammer；Isoelectric level workman,
After current potential workman is checked on tower without legacy, the lower tower of insulation transmission rope is carried.
In at least one of which embodiment, the hotline maintenance technique includes changing double " V " insulator chains of straight line, turns firmly
The operational method of double " L " insulator chains, double " V " insulator chains of the replacing straight line, the hard operational method for turning double " L " insulator chains
Comprise the following steps：Using main material at construction hole or hanging point is reserved at insulator chain hanging point do fulcrum on the tower of instrument, mounting rod
Tower cross-arm special mould clamp, the side of wire fulcrum for making instrument using side of wire duplex plate install machete card；By carrying line apparatus, high-strength
Degree insulated tension pole is connected with special mould clamp on tower, constitutes the mechanical load transfer system of insulator chain；Carried on the back using the card of machete card
With duplex plate contact position as fulcrum, and machete card is divided into actuation arm and motion arm, operation carries line apparatus carries out small distance
Linear deflection is proposed, drives machete card motion arm to rotate, load on induced effect arm transfer insulator chain makes to be overhauled insulator chain machine
Tool load transfer realizes the maintenance and replacing of insulator chain to linear system system is carried.
In at least one of which embodiment, in double " V " insulator chains of the replacing straight line, hard turn of double " L " insulator chains
Operational method in, the line apparatus that carry include mechanical lead screw, hydraulic screw rod.
In at least one of which embodiment, the hotline maintenance technique includes the operation for changing strain insulator porcelain rod insulator
Method, the operational method of the replacing strain insulator porcelain rod insulator are comprised the following steps：After entering current potential, two isoelectric level workmans
Using erect-position in back-to-back fashion on adjacent porcelain rod insulator, fulcrum is done using towing plate and parallel link plate and cross-arm is installed
Side strain insulator personality card, does fulcrum using porcelain rod insulator steel cap and installs card after closed fixture, connect strain insulator with hydraulic screw rod component
Personality card and closed fixture composition stringing system, then installing tripod component is used for means of transportation and insulator；Using in front and back's rod
Formula insulator steel cap makees the front card and rear card that fulcrum is respectively mounted closed fixture, with hydraulic screw rod component connect closed fixture front card and
Card composition stringing system, then installs tripod component for means of transportation and insulator afterwards；Fulcrum is done using insulator steel cap
Block before closed fixture is installed, fulcrum conducting wire lateral wing type card is made using yoke plate, connect closed fixture and wire with hydraulic screw rod component
Lateral wing type card constitutes stringing system, and then installing tripod component is used for means of transportation and insulator；Operation hydraulic screw rod is tightened up
Stringing system, shifts by the mechanical load on maintenance porcelain rod insulator, realizes the replacing and maintenance of insulator.
± 500kV common-tower double-return DC power transmission line hotline maintenance the techniques of the present invention, are domestic and international first supertension
Common-tower double-return DC power transmission line livewire work application technical research project, passes through ± 500kV common-tower double-return DC power transmission lines
The characteristics of research, it is achieved that to project research work complete and achievement in research application, filled up domestic and international superelevation straightening
Stream livewire work, the blank of hotline maintenance applied technical field.
【Description of the drawings】
Fig. 1 be using presently preferred embodiments of the present invention ± 500kV common-tower double-return DC power transmission line hotline maintenance techniques in
Enter the schematic diagram of equipotential method.
Fig. 2 is the schematic diagram that " just carrying line " method changes insulator chain.
Adopt in Fig. 3 A, 3B respectively double " V " insulator chains of replacing straight line, hard turn of pair " L " insulator chain operational methods
The front view and top view of machete card.
Fig. 4 be using Fig. 3 in double " V " insulator chain of machete card replacement straight line, the hard operation for turning double " L " insulator chains shows
It is intended to.
Fig. 5 A, 5B be respectively change strain insulator porcelain rod insulator method employed in fluid pressure type closed fixture front card and after
The structural representation of card.
Fig. 6 A, 6B are respectively the partial cutaway of the cross-arm side wing clamp employed in the method for changing strain insulator porcelain rod insulator
View and the partial sectional view of another angle.
Fig. 7 is the structural representation for changing the side of wire wing clamp employed in the method for strain insulator porcelain rod insulator.
【Specific embodiment】
For more fully understanding the present invention, invention is described in detail below with reference to accompanying drawing and instantiation.
Before being described in detail to technical scheme, letter is carried out to the theoretical basiss of project research first
Single statement：
(1) the shaft tower knot of ± 500kV direct current multiple-circuit on same tower provided according to designing units such as Central Southern China Electric Power Design Institutes
Structure, insulator serial type, gold utensil type of attachment, lead wire and earth wire arrangement and permanent way machine load level and the air gap form；
(2) ± 500kV common-tower double-return DC power transmission line overvoltage levels are divided according to State Network Electric Power Research Institute
Analysis calculating and the research of ± 500kV common-tower double-return DC line livewire work gap experiments, the supertension common-tower double-return of proposition are straight
The bands such as Flow Line livewire work minimum safe distance, minimum combination gap, the effective insulated lengths of instrument and effective sub-pieces number
Electric operation Insulation Coordination theoretical value；
(3) according to Guo Wang companies new edition in 2009《Safety》And《± 500kV DC power transmission line livewire work technology is led
Then》The livewire work minimum safe distance of defined, minimum combination gap, the effective insulated lengths of instrument and effective sub-pieces number
Coordinate theoretical value Deng live line work insulating；
(4) according to State Network Electric Power Research Institute《± 500kV common-tower double-return DC line livewire work experimentatioies》(high
On 2 28th, 2010 second phase of Voltage Technique volume 36) calculated livewire work minimum safe distance, between minimum combination
The test values such as gap.
± 500kV Ge Nan (woods maple line) common-tower double-return DC power transmission line engineering (i.e. two times, three Shanghai DC transmission engineering) is made
For the super high voltage direct current electricity transmission engineering of First common-tower double-return, its power transmission lines overhauling, livewire work work at home and abroad still
Do not carry out, its operation technique and application tool development work urgent need to resolve.
± 500kV Ge Nan lines (woods maple line) common-tower double-return DC power transmission line population structure is by shaft tower, insulator, leads ground
Line and connection gold utensil composition, increased a floor cross-arm than single time superhigh voltage DC circuit tower is used for undertaking another loop line road.It is located at
Liao Guowang Electric Power Section institute basis with regard to ± 500kV common-tower double-return DC line livewire work technical research achievement is deeply digested
On, serious analysis ± 500kV common-tower double-return DC line design parameters have fully been inquired into and common ± 500kV electric pressures
The diversity of livewire work, particularity, have studied common-tower double-return superhigh voltage DC line maintenance operation, livewire work operational approach
And operating procedure, it is determined that ± 500kV common-tower double-return DC line live line work insulating work-in parameters, emphasis is to entering isoelectric level
Method and change the technological process of insulator and conduct in-depth research, verify that livewire work personnel protection is specifically arranged
Apply.
First, it is livewire work elemental operation mode to enter equipotential live line work, is that other livewire work projects are realized again
Basis.The difficulty that enter current potential is broken through first, according to ± 500kV common-tower double-return DC Transmission Line Design construction featuress, shaft tower
The gap form and the air gap level of window size and job requirements, abandoned traditional cross-arm hang rope ladder vertically into etc.
The mode of current potential, research design driving rope ladder level swing in equipotential operational method.
Equipotential operational method will be swung in driving rope ladder level below to be introduced in detail.
On the tower of this method, operating personnel needs two, wherein one entitled isoelectric level electrician, ground potential on another entitled tower
Electrician.Before isoelectric level is entered, isoelectric level workman must wear a complete set of shielding clothing, including cap, clothing, glove, socks and footwear, and
Wear shielding mask.Additionally, should also wear fire-retardant underwear in shielding clothing..Ground potential workman must wear a complete set of electrostatic protective suit
Dress and conductive shoeses.
After isoelectric level workman and ground potential workman are finished according to above-mentioned dressing specification wearing, enter according to the following steps etc.
Current potential：
(1) isoelectric level workman, ground potential workman carry insulation transmission rope and step on tower to earth wire support, fasten seat belts, will
Insulation coaster and insulation transmission rope are installed in operation earth wire support appropriate location.
(2) surfaceman's transmission insulated flexible ladder, insulated flexible ladder hanging head (installing rope ladder tricing line) are to ground potential workman position
Put.
(3) damper of ground potential workman dismounting working side aerial earth wire (if ground wire is insulated static wire, is needed before work
In not working side by insulated static wire reliable ground), then by rope ladder hanging head reliably on aerial earth wire, and install soft
Terraced hanging head tricing line.
(4), after isoelectric level workman checks that the connection of screening clothing each several part is good, insulation protection rope is fastened, insulated flexible ladder station is climbed up
Well and seat belt is lain on insulated flexible ladder.If strain rod tower, ground potential workman will be insulated soft using rope ladder hanging head tricing line
Ladder moves to the parallel place of strain clamp along aerial earth wire.If straight line pole, ground potential workman will absolutely using rope ladder hanging head tricing line
Edge rope ladder moves about 5m outside aerial earth wire, and isoelectric level workman is descending along insulated flexible ladder, to shoulder concordant with upper sub-conductor when stop.
(5) surfaceman swings insulated flexible ladder using insulated flexible ladder tail rope, and isoelectric level workman is at live wire about 0.5m
When quickly stretch out one's hand and hold wire and carry out potential transfer.
(6) isoelectric level workman fastens seat belts after entering current potential, and needs whether to release insulation protection rope according to operation.
After entering isoelectric level, you can carry out the hotline maintenance work of ± 500kV common-tower double-return DC power transmission lines.For example,
Charged for replacement hammer for preventing conductor from vibration, live-line replacing strain side of wire gold utensil, charged for replacement adjustment lead spacer and charged for replacement
Insulator etc..Hereinafter the maintenance craft of which part part will be described in detail.
After the completion of hotline maintenance work, isoelectric level workman can exit isoelectric level as follows：
(1), after isoelectric level workman checks that the connection of screening clothing each several part is good, climb up insulated flexible ladder station and get well and will be safe
Band lies in (one holds insulated flexible ladder, and proficiency arm stretching holds wire) on insulated flexible ladder.
(2) after agreeing to subject to work director, isoelectric level workman unclamps wire and withdraws rapidly arm, surfaceman's profit
Insulated flexible ladder is swung with insulated flexible ladder tail rope, isoelectric level workman exits isoelectric level.
(3) insulated flexible ladder is moved to horizontal stroke along aerial earth wire using insulated flexible ladder tricing line at earth wire support by ground potential workman
At load.Isoelectric level workman unties the seat belt lain on insulated flexible ladder, and cross-arm is climbed up in climbing upwards, is fastened seat belts.
(4) ground potential workman coordinates the whole instruments of dismounting with ground electrician, and recovers the installation of ground wire shockproof hammer (if any then
Earth lead is finally removed).
(5), after isoelectric level workman, ground potential workman are checked on tower without legacy, the lower tower of insulation transmission rope is carried.
According to above-mentioned entrance and the method for exiting current potential, you can the portion on right ± 500kV common-tower double-return DC power transmission lines
Part is overhauled.Due to the events in operation in ± 500kV common-tower double-return DC power transmission lines many, the maintenance mode of section components with
Operational method before is identical, therefore will not be described here.Below by the weight to the hotline maintenance technique such as replacing insulator under electrified
Point operational approach is described in detail.
First, double " V " insulator chains of straight line, the hard work for turning double " L " insulator chains are changed to " lever principle is micro- to carry collimation method "
Industry method is illustrated.
± 500kV Ge Nan lines (woods maple line) multiple-circuit on same tower engineering design, the whole tangent towers of circuit are using double " V " insulation
Substring and hard capstan head adopt the assembling mode of double " L " insulator chains.When there is defect in insulator chain parts, general employing
" just carrying line " mode shifts the mechanical load of insulator chain, maintenance and replacing insulator chain.Fig. 2 is referred to, so-called " is just carried
Line " mode is primarily referred to as, and does fulcrum on the tower of instrument with reserved construction hole (or main material) in place directly over wire yoke plate, installs shaft tower
Cross-arm special mould clamp (or fastening means), by connection carry line apparatus (mechanical lead screw or hydraulic screw rod), high-strength insulating pull bar,
Quadripartion line lifter is connected and is connected with wire, constitutes the mechanical load transfer system of insulator chain.By operation machinery screw mandrel or
Hydraulic screw rod makes load transfer system tighten up stress, slowly lifts wire, makes to be overhauled insulator chain mechanical load and is transferred to
Linear system system is carried, the maintenance of insulator chain is realized.However, the mechanical load for carrying line Work tool of the operating type of this " just carrying line "
Greatly, be likely to result in maintenance side insulator chain horizontal direction force to diminish so that wire is offset round about, when and in inspection
When repairing defective insulator chain, to also be insulated with exemption from inspection using wire lateral displacement measure is prevented when insulator chain resets
Substring resets difficult.
Therefore, according to the construction featuress of ± 500kV common-tower double-return DC Transmission Line Designs, straight line is changed in this project
Double " V " insulator chains, hard turn of double " L " insulator chain operations using machete card and utilize " lever principle is micro- to put forward line working system " to shift
The mechanical load of insulator chain.The structure of machete card is as shown in Fig. 3 A, 3B.Please refer to Fig. 4, one end of machete card be with
The hook that the core through screw rod of inverted triangle duplex plate matches, the other end are the opening for external screw mandrel.Coupling hook and opening
Waist be provided with the platform contacted with the bottom side of inverted triangle duplex plate.The hook end of machete card is provided with and is sleeved on down
The bayonet socket of triangle duplex plate both sides, the root platform of bayonet socket are contacted with inverted triangle duplex plate bottom side.The opening two of machete card
Side is provided with the through hole for installing milled screw, and the through hole is used for external screw mandrel.The waist of machete card is additionally provided with groove.Exist if desired
Pre- maintenance and maintenance are carried out relative to the gold utensil on certain one side on triangle duplex plate, then first the bayonet socket of machete card is installed on
While the inverted triangle duplex plate side bottom, hook catches on the core through screw rod in inverted triangle duplex plate center, the root of bayonet socket
Portion's platform holds up one end of the pre- maintenance and maintenance of inverted triangle duplex plate, and the other end of such inverted triangle duplex plate upper side is
Fulcrum, opening are lever end.Then opening is applied by manual adjustment screw mandrel in the external screw mandrel of opening again
Power, such lever end be need to only apply less strength at opening just can be by the pre- maintenance of triangle duplex plate and one end of maintenance
On heavier load lay down.
Using machete card and " lever principle is micro- to put forward line working system " is utilized to change double " V " insulator chain of straight line, hard turn double " L "
The concrete operations of the operational method of insulator chain are as follows：
(1) fulcrum on the tower of instrument, mounting rod are done using reserved construction hole (or main material at hanging point) at insulator chain hanging point
Tower cross-arm fixture, the side of wire fulcrum for making instrument using side of wire duplex plate install machete card；
(2) it is connected with cross-arm fixture on tower by carrying line apparatus (mechanical lead screw or hydraulic pressure silk), high-strength insulating pull bar, group
Mechanical load transfer system into insulator chain；
(3) card by the use of machete card is carried on the back with duplex plate contact position as fulcrum, and machete card is divided into actuation arm and operation
Arm, operation carry line apparatus and carry out the linear deflection that proposes of small distance, drive machete card motion arm to rotate, and induced effect arm shifts insulator
Load on string, makes to be overhauled insulator chain mechanical load and is transferred to and carry linear system system, realizes the maintenance of insulator chain.
In above-mentioned technique, double " V " insulator chains, the hard workload for turning double " L " insulator chain machete cards are 50KN.On
Technique is stated due to make use of lever principle, what operation carried that line apparatus carry out small distance proposes linear deflection, you can drive the operation of machete card
Arm is rotated, load on induced effect arm transfer insulator chain, can quickly and easily change double " V " insulator chains, hard turn double " L "
Insulator chain.
Finally, the operational method for changing strain insulator will be described in detail.
Change the conventional project that strain insulator, insulator chain are power transmission lines overhauling and livewire work, and power transmission line
The routine work of road operating maintenance.Changing strain insulator, insulator chain in general maintenance craft has traditional employing bottle supporting
Method replacing strain insulator method is put in rotation after frame is changed strain insulator method and improved.Bottle-holding rack method is, in maintenance insulator chain
Stringing system is installed at two ends, and places bottle-holding rack thereunder, and tightening up stringing system makes insulator chain from wire tension, then
Disengage insulator chain and wire, cross-arm to link, then insulator chain placement ground will be overhauled with bottle-holding rack by insulated sling,
Anti- work flow completes upkeep operation afterwards.The rotation method of putting is first to loosen insulator with insulator chain tensioning device, then with leading
Draw the anti-insulator that leads of system to disengage side of wire porcelain vase, porcelain vase string is put along the rotation of tower hitch point and put to ground again to upright position.
Anti- work flow completes upkeep operation.
± 500kV Ge Nan lines (woods maple line) multiple-circuit on same tower strain insulator string is designed as horizontal glass insulator or porcelain
Rod insulator duplex string assembling mode.Wherein glass string minimum (Qing Wu areas) 40, up to 10.737 meters, single string weight reaches
0.73T, maximum (Chong Wu areas) 57, up to 14.222 meters, single about 0.97T that weighs that goes here and there；Porcelain rod insulator string is constituted by 7,
14.772 meters are up to, single string weighs about 0.95T.Although the maintenance mode that whole string is changed, using traditional changing strain insulator string
The practical operation of tissue and scene that method carries out construction equipment is technically possible to, but as conventional maintenance,
The mode of livewire work is particularly taken to be overhauled or have sizable difficulty.Therefore, the same towers of this project basis ± 500kV
The design structure of double back DC line engineering double strain and the insulating forms of employing, from the operating type emphasis of single Zhi Genghuan
Research design is replaced porcelain rod insulator by short circuit null value, so as to reach the purpose of replacing.Its specific operating process
As follows：
(1) after entering current potential, two isoelectric level workmans using " back-to-back " mode erect-positions on adjacent rod insulator,
Fulcrum is done using towing plate (QY-42S types) and parallel link plate (P-42S) cross-arm side strain clamped (as shown in Figure 6) is installed, utilized
It is (as shown in Figure 5), special with hydraulic screw rod component connection strain insulator that porcelain rod insulator steel cap makees card after fulcrum installs closed fixture
Card and closed fixture constitute stringing system, and then installing tripod component is used for means of transportation and insulator；
(2) fulcrum is done using rod insulator steel cap in front and back be respectively mounted the front card and rear card of closed fixture (such as institute in Fig. 5
Show), the front card and rear card composition stringing system for connecting closed fixture with hydraulic screw rod component, then installing tripod component is used for passing
Send instrument and insulator；
(3) fulcrum is done using insulator steel cap and card before closed fixture is installed, do fulcrum using yoke plate (LS-84600500S types)
Conducting wire side special airfoil card (as shown in Figure 7), connects closed fixture and side of wire special airfoil card with hydraulic screw rod component
Stringing system is constituted, then installing tripod component is used for means of transportation and insulator；
(4) operation hydraulic screw rod tightens up stringing system, shifts by the mechanical load on maintenance porcelain rod insulator, realizes absolutely
The replacing and maintenance of edge.
The monolithic Renewal process of common insulator：Fulcrum is done using cross-arm side yoke plate, cross-arm side strain insulator personality card, profit are installed
Fulcrum is done with insulator steel cap, is blocked before insulator closed card is installed, connect strain insulator personality card and closed fixture composition with hydraulic screw rod
Stringing system；Fulcrum is done using insulator steel cap, the front card and rear card of insulator closed card is respectively mounted, is connected with hydraulic screw rod
The front card of insulator closed card and rear card composition stringing system；Fulcrum is done using insulator steel cap, after insulator closed card is installed
Card, does fulcrum using side of wire yoke plate, and conducting wire side conversion wing clamp connects closed fixture and side of wire conversion with hydraulic screw rod
Wing clamp constitutes stringing system, and operation hydraulic screw rod tightens up stringing system, shifts by the mechanical load on maintenance insulator, realizes
The replacing and maintenance of insulator.By above-mentioned technique, can achieve the monolithic to strain insulator string and change, it is ensured that strain insulator insulate
Substring is used as the convenient degree of the conventional operation that overhauls.
In sum, ± 500kV common-tower double-return DC power transmission line hotline maintenance techniques of the invention, are domestic and international first
Individual ± 500kV common-tower double-returns livewire work application technical research project, project research work complete and achievement in research application,
Domestic and international ± 500kV common-tower double-return DC power transmission line livewire work, the blank of hotline maintenance applied technical field are filled up.This
Specific operational method in the ± 500kV common-tower double-return DC power transmission line hotline maintenance techniques of invention covers ± 500kV
The maintenance of common-tower double-return DC power transmission line, livewire work routine service work content, porcelain strut insulator replacing tool therein,
The operational method that single short circuit method of large-tonnage assembled hydraulic screw mandrel is changed is applied to livewire work, be especially applied to ±
In 500kV multiple-circuit on same tower operational methods, it is the important breakthrough of livewire work applied technical field
Embodiment described above only expresses the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformations and improvement can also be made, these belong to the guarantor of the present invention
Shield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (7)
1. one kind ± 500kV common-tower double-returns DC power transmission line hotline maintenance method, it is characterised in that：The hotline maintenance method
Including entering equipotential operational method, the equipotential operational method of the entrance is comprised the following steps：
After isoelectric level workman and ground potential workman are finished according to dressing specification wearing, carry insulation transmission rope and tower is stepped on to earth wire support
Place fastens seat belts, and will insulate coaster and insulation transmission rope are arranged on earth wire support appropriate location；
Surfaceman's transmission insulated flexible ladder, insulated flexible ladder hanging head are to ground potential workman position；
Ground potential workman removes the damper of working side aerial earth wire, and then insulated flexible ladder hanging head is reliably arranged on aerial earth wire
On, and install insulated flexible ladder tricing line；
After isoelectric level workman checks that the connection of shielding clothing each several part is good, insulation protection rope is fastened, insulated flexible ladder station is climbed up well simultaneously
Seat belt is lain on insulated flexible ladder, if then ground potential workman utilizes insulated flexible ladder tricing line by insulated flexible ladder edge to strain rod tower
Aerial earth wire moves to the parallel place of strain clamp, if straight line pole then ground potential workman will be insulated using insulated flexible ladder tricing line soft
Ladder move 5m outside aerial earth wire, isoelectric level workman is descending along insulated flexible ladder, to shoulder concordant with upper sub-conductor when stop；
Surfaceman swings insulated flexible ladder using insulated flexible ladder tail rope, quickly stretches out one's hand when isoelectric level workman is at live wire 0.5m
Holding wire carries out potential transfer.
2. ± 500kV common-tower double-returns DC power transmission line hotline maintenance method according to claim 1, it is characterised in that：
Enter in equipotential operational method described, isoelectric level workman fastens seat belts after entering isoelectric level, and according to operation needs
Determine whether to release insulation protection rope.
3. ± 500kV common-tower double-returns DC power transmission line hotline maintenance method according to claim 1, it is characterised in that：
The dressing specification includes that isoelectric level workman wears in a complete set of shielding clothing and shielding clothing and wears fire-retardant underwear, the shielding
Clothing include that shielding cap, shielding clothing, screening glove, screening socks, shielding footwear and shielding mask, ground potential workman must be worn
A complete set of electrostatic protective clothing and conductive shoeses.
4. ± 500kV common-tower double-returns DC power transmission line hotline maintenance method according to claim 1, it is characterised in that
After the completion of hotline maintenance work, isoelectric level is exited according to following steps：
After isoelectric level workman checks that the connection of shielding clothing each several part is good, insulated flexible ladder station is climbed up good and seat belt is lain in insulation
On rope ladder；
Isoelectric level workman unclamps wire and withdraws rapidly arm, and surfaceman swings insulated flexible ladder using insulated flexible ladder tail rope,
Isoelectric level workman exits isoelectric level；
Insulated flexible ladder is moved at cross-arm along aerial earth wire at earth wire support by ground potential workman using insulated flexible ladder tricing line, etc.
Current potential workman unties the seat belt lain on insulated flexible ladder, and cross-arm is climbed up in climbing upwards, is fastened seat belts；
Ground potential workman coordinates the whole instruments of dismounting with surfaceman, and recovers the installation of the damper of aerial earth wire；
After isoelectric level workman, ground potential workman are checked on tower without legacy, the lower tower of insulation transmission rope is carried.
5. ± 500kV common-tower double-returns DC power transmission line hotline maintenance method according to any one of claim 1 to 4,
Characterized in that, the hotline maintenance method includes changing double " V " insulator chains of straight line or the hard operation for turning double " L " insulator chains
Method, double " V " insulator chains of the replacing straight line or the hard operational method for turning double " L " insulator chains are comprised the following steps：
Fulcrum on tower is done using reserved construction hole at insulator chain hanging point or using main material at insulator chain hanging point, shaft tower is installed horizontal
Load special mould clamp, does side of wire fulcrum using side of wire duplex plate and installs machete card；
Machete card is connected with cross arm of tower special mould clamp by carrying line apparatus, high-strength insulating pull bar, constitutes carrying for insulator chain
Linear system is united；
Card by the use of machete card is carried on the back with side of wire duplex plate contact position as fulcrum, and machete card is divided into actuation arm and operation
Arm, operation carry line apparatus and carry out the linear deflection that proposes of small distance, drive machete card motion arm to rotate, and induced effect arm shifts insulator
Load on string, makes to be overhauled insulator chain mechanical load and is transferred to and carry linear system system, realizes the maintenance and replacing of insulator chain.
6. ± 500kV common-tower double-returns DC power transmission line hotline maintenance method according to claim 5, it is characterised in that：
Change in double " V " insulator chains of straight line or the hard operational method for turning double " L " insulator chains described, the line apparatus that carry include machine
Tool screw mandrel or hydraulic screw rod.
7. ± 500kV common-tower double-returns DC power transmission line hotline maintenance method according to any one of claim 1 to 4,
Characterized in that, the hotline maintenance method includes the operational method for changing strain insulator porcelain rod insulator, the replacing strain insulator porcelain
The operational method of rod insulator is comprised the following steps：
After entering isoelectric level, two isoelectric level workmans adopt erect-position in back-to-back fashion on adjacent porcelain rod insulator, sharp
Fulcrum is done with towing plate and parallel link plate cross-arm side strain insulator personality card is installed, fulcrum installation is done using porcelain rod insulator steel cap and closed
Block after formula card, connect card after cross-arm side strain insulator personality card and closed fixture with hydraulic screw rod component and constitute stringing system, then install
Tripod component is used for means of transportation and porcelain rod insulator；
Stringing system tightened up by operation hydraulic screw rod component, shifts by the mechanical load on maintenance porcelain rod insulator, realizes porcelain rod
The replacing and maintenance of formula insulator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310616162.3A CN103618249B (en) | 2013-11-27 | 2013-11-27 | ± 500kV common-tower double-return DC power transmission line hotline maintenance techniques |
| PCT/CN2014/083325 WO2015078195A1 (en) | 2013-11-27 | 2014-07-30 | Live overhaul process for ± 500 kv double-loop dc power transmission line on same tower |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310616162.3A CN103618249B (en) | 2013-11-27 | 2013-11-27 | ± 500kV common-tower double-return DC power transmission line hotline maintenance techniques |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103618249B (en) * | 2013-11-27 | 2017-03-15 | 国家电网公司 | ± 500kV common-tower double-return DC power transmission line hotline maintenance techniques |
| CN104201616A (en) * | 2014-09-26 | 2014-12-10 | 陕西省地方电力(集团)有限公司南郑县供电分公司 | Low-voltage power distribution overhead line strain power pole fitting connecting structure and connecting method |
| CN104638565A (en) * | 2015-01-30 | 2015-05-20 | 国家电网公司 | Method for performing equipotential live line work by putting +/-800kV tangent tower electric transmission line into electric field |
| CN104600629A (en) * | 2015-02-12 | 2015-05-06 | 中国南方电网有限责任公司超高压输电公司百色局 | Compact-circuit six-bundled conductor linkage plate fixture and application thereof |
| CN104979776A (en) * | 2015-07-10 | 2015-10-14 | 中国电力科学研究院 | Method for entering equipotential level for tension support of UHV transmission line |
| CN105591314A (en) * | 2015-09-09 | 2016-05-18 | 国家电网公司 | UHV DC transmission line strain tower electrified processing hardware fitting fall-off field operation process |
| CN108649481A (en) * | 2018-04-25 | 2018-10-12 | 中国电力科学研究院有限公司 | Transmission line of alternation current livewire work personnel's equipotential safe transfer method |
| CN109830913A (en) * | 2019-02-11 | 2019-05-31 | 国家电网有限公司 | The combination tool and method of vertical rotary method replacement direct current grounding pole line tension string |
| CN110165600B (en) * | 2019-06-03 | 2020-09-04 | 国家电网有限公司 | Device and method for entering and exiting electric field of double-loop same-tower power transmission line |
| CN114877781A (en) * | 2022-06-07 | 2022-08-09 | 广东骏亚电子科技股份有限公司 | Manufacturing method of stepped groove |
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| CN101728787A (en) * | 2008-10-29 | 2010-06-09 | 国网电力科学研究院 | Equipotential access method of 500kV same-tower four-circuit transmission line tangent tower live-wire work |
| CN102842867A (en) * | 2012-08-31 | 2012-12-26 | 辽宁省电力有限公司鞍山供电公司 | Method for electrically disconnecting or connecting disconnector with drainage wire between buses |
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| JP2013188060A (en) * | 2012-03-09 | 2013-09-19 | Chugoku Electric Power Co Inc:The | Repair method for transmission line |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103618249B (en) * | 2013-11-27 | 2017-03-15 | 国家电网公司 | ± 500kV common-tower double-return DC power transmission line hotline maintenance techniques |
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- 2013-11-27 CN CN201310616162.3A patent/CN103618249B/en active Active
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| CN101728787A (en) * | 2008-10-29 | 2010-06-09 | 国网电力科学研究院 | Equipotential access method of 500kV same-tower four-circuit transmission line tangent tower live-wire work |
| JP2013188060A (en) * | 2012-03-09 | 2013-09-19 | Chugoku Electric Power Co Inc:The | Repair method for transmission line |
| CN102842867A (en) * | 2012-08-31 | 2012-12-26 | 辽宁省电力有限公司鞍山供电公司 | Method for electrically disconnecting or connecting disconnector with drainage wire between buses |
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| WO2015078195A1 (en) | 2015-06-04 |
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