CN103618251A - Technology for electrified overhaul of +-800kV ultrahigh voltage direct-current transmission line - Google Patents
Technology for electrified overhaul of +-800kV ultrahigh voltage direct-current transmission line Download PDFInfo
- Publication number
- CN103618251A CN103618251A CN201310617102.3A CN201310617102A CN103618251A CN 103618251 A CN103618251 A CN 103618251A CN 201310617102 A CN201310617102 A CN 201310617102A CN 103618251 A CN103618251 A CN 103618251A
- Authority
- CN
- China
- Prior art keywords
- insulator
- voltage direct
- transmission line
- current transmission
- string
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
Landscapes
- Electric Cable Installation (AREA)
- Insulators (AREA)
Abstract
The invention provides a technology for electrified overhaul of a +-800kV ultrahigh voltage direct-current transmission line. The operating method entering the equal potential comprises the following steps that an equal potential worker wears clothes according to the wearing standard, moves to the position of a cross arm of a tower along a strain tower, ties an insulated protecting rope and enters the connecting position of fittings at the cross-arm side, and ties the safety belt on handheld insulated sub-chains; after checking that all parts of the shield clothes are well connected, the equal potential worker carries a potential transfer stick to get ready to enter the insulated sub-chains; when entering the potential, the equal potential worker grabs one string of the insulated sub-chains with the two hands, the feet of the equal potential worker stamp on another string of the insulated sub-chains, and the equal potential worker moves to the position 0.5 m away from a grading ring at the conductive wire side and stops in a mode that the equal potential worker moves parallel and stretches over two insulated pieces; the potential transfer stick is stretched out quickly, the potential transfer stick is hooked to the nearest sub-conductive wire or the connecting fitting, and potential transfer is conducted. According to the electrified repairing and maintenance technology of the +-800kV ultrahigh voltage direct-current transmission line, researches of the characteristics of the +-800kV ultrahigh voltage direct-current transmission line are conducted, so that project research work and the application of the research result are achieved, and the electrified repairing and maintenance technology of the +-800kV ultrahigh voltage direct-current transmission line fills the gaps in the domestic and foreign ultrahigh-voltage direct-current electrified operations and electrified repairing and maintenance application technology.
Description
[technical field]
The present invention relates to extra-high voltage electric transmission and transformation field, relate in particular to a kind of ± 800kV extra high voltage direct current transmission line hotline maintenance technique.
[background technology]
Transmission line operation maintenance service work is the important means of grasping operation of power networks situation, discovery in time and treatment facility defect, is also the element task of guaranteeing line security stable operation.Because extra-high voltage grid is in service in core status at whole national grid, so the operating maintenance work of extra-high voltage grid is of great significance for safe, stable, the reliability service tool that guarantee extra-high voltage grid and even whole national grid.
± 800kV UHVDC Transmission Lines is a brand-new electric pressure, and large difference, especially wire division number have been compared in its working voltage, line construction, window gap etc. with other engineering, and insulator string assembly type has a very large change.Therefore, traditional operational method and check man's utensil can not meet the needs of UHVDC Transmission Lines maintenance.As carried out upkeep operation, live line working, be first must a set of science of research operational method, the research of UHVDC Transmission Lines maintenance, live line working method and operation Work tool will be our problem anxious to be resolved at present.
± 800kV UHVDC Transmission Lines upkeep operation, live line working are important contents of circuit operating maintenance work.The achievement in research of this problem is by the blank of filling up in China's extra high voltage direct current transmission line maintenance and live working tools development and live line working maintenance application technology.To starting UHVDC Transmission Lines maintenance, guarantee the safety of extra-high voltage direct-current live line working, improve line maintenance efficiency, guarantee that the general level of the health of equipment plays huge effect.Secondly, the application of live line working technology will reduce the power failure hourage of UHVDC Transmission Lines greatly, has improved the availability factor of circuit, has guaranteed economy, the reliability service of circuit.
[summary of the invention]
In view of this, for overcoming the deficiencies in the prior art, the hotline maintenance technique of the be applicable to ± 800kV extra high voltage direct current transmission line that is necessary to provide a kind of.
A kind of ± 800kV extra high voltage direct current transmission line hotline maintenance technique, described hotline maintenance technique comprises and enters equipotential operational method, describedly enter equipotential operational method and comprise the following steps: after equipotential workman dresses according to dressing standard, along strain tower, step on tower to cross-arm place, fasten insulation protection rope and enter cross arm side hardware fitting connection place, safety belt is tied up on hand steered insulator string; After checking that shielding clothing each several part connects well, carry electric potential transferring stick and prepare to enter insulator string; While entering current potential, both hands grip a string insulator string, and both feet are stepped on another insulator string string, and trick adopts maximum mode parallels across two insulators to stopping apart from side of wire was grading ring 0.5m place; Stretch out fast electric potential transferring stick, be hooked in nearest sub-conductor or connect on gold utensil and carry out potential transfer.
In at least one embodiment, described, enter in equipotential operational method therein, equipotential workman fastens seat belts after entering current potential, and need to determine whether to remove insulation protection rope according to operation.
In at least one embodiment, described dressing standard comprises wearing in a complete set of shielding clothing and shielding clothing wears fire-retardant underwear therein, and described shielding clothing comprises shielding cap, shielding clothing, screening glove, screening socks, shielding footwear and shielding face shield.
In at least one embodiment, if described hotline maintenance technique comprises maintenance and/or the replacing of glass insulator, equipotential workman also will wear goggles before entering equipotential therein.
Therein at least one embodiment, after hotline maintenance work completes, equipotential workman exits equipotential according to following steps: after checking that shielding clothing each several part connects well, the metal end of electric potential transferring stick is hooked in to sub-conductor or connects on gold utensil, hold tight insulated handle for one, enter insulator string and apart from side of wire was grading ring 0.5m place, stop (keeping arm straight configuration); Throw off rapidly electric potential transferring stick and sub-conductor or be connected the connection of gold utensil, and with it electric potential transferring stick withdrawal is firmly placed on, according to trick, across the mode of two insulators (" short by three across two "), exit equipotential at most and return to cross-arm; On inspection tower, without after legacy, carrying insulation and transmitting the lower tower of rope.
Therein at least one embodiment, described hotline maintenance technique comprises the operational method of changing two " V " insulator strings of straight line, firmly turning two " L " insulator strings, two " V " insulator strings of described replacing straight line, the operational method that firmly turns two " L " insulator strings comprise the following steps: from tangent tower enters current potential, utilize reserved construction hole, insulator string hanging point place or the main material in hanging point place to do fulcrum on the tower of instrument, cross arm of tower special mould clamp is installed, and the side of wire was fulcrum that utilizes side of wire was duplex plate to make instrument is installed machete card; By carrying line apparatus, high-strength insulating pull bar is connected with special mould clamp on tower, forms the mechanical load transfer system of insulator string; Utilize the card of machete card to carry on the back with duplex plate contact position as fulcrum, and machete card is divided into actuation arm and motion arm, the linear deflection of proposing that line apparatus carries out small distance is proposed in operation, drive machete card motion arm to rotate, induced effect arm shifts load on insulator string, make to be overhauled the load transfer of insulator string machinery to putting forward wire system, realize maintenance and the replacing of insulator string.
Therein at least one embodiment, at two " V " insulator strings of described replacing straight line, firmly turn in the operational method of two " L " insulator strings, described side of wire was duplex plate comprises L-6465S, L-8465S, Z-6450S and Z-84S duplex plate, described in carry line apparatus and comprise mechanical screw mandrel and hydraulic screw rod.
Therein at least one embodiment, described hotline maintenance technique comprises the operational method of changing straight line list " V ", two " V " insulator string, the operational method of described replacing straight line list " V ", two " V " insulator string comprises the following steps: with the cross-arm side fulcrum of locating reserved construction hole or main material directly over wire yoke plate and do instrument, cross-arm side instrument or fastening means are installed; By cross-arm side jig, connect high-strength insulating pull bar, hydraulic screw rod and six division line lifters, form the wire system of putting forward of two cover independent stressed; Operation hydraulic screw rod lifting lead wire shifts the mechanical load of insulator string, realizes maintenance and the replacing of insulator string.
Therein at least one embodiment, described hotline maintenance technique comprises the operational method of changing strain insulator, the operational method of described replacing strain insulator comprises the following steps: utilize P-42S-120 yoke plate to do fulcrum towing plate wing clamp is installed, before utilizing insulator steel cap to do the sub-closed fixture of fulcrum installing insulating, block, with hydraulic screw rod, connect wing clamp and closed fixture composition stringing system; Utilize insulator steel cap to do fulcrum front card and the rear card of the sub-closed fixture of installing insulating respectively, with front card and the rear card of hydraulic screw rod connecting insulator closed fixture, form stringing system; After utilizing insulator steel cap to do the sub-closed fixture of fulcrum installing insulating, block, utilize towing plate, with parallel link plate fulcrum, triple strain card is installed, with hydraulic screw rod, connect closed fixture and triple strain card composition stringing system; Operation hydraulic screw rod tightens up stringing system, shifts by the mechanical load on maintenance insulator, realizes replacing and the maintenance of insulator.
Of the present invention ± 800kV extra high voltage direct current transmission line hotline maintenance technique, it is domestic and international first extra-high voltage electrified operation application technical research project, the research of the feature by ± 800kV extra high voltage direct current transmission line has realized the completing and the application of achievement in research of project research work, has filled up the blank of domestic and international extra-high voltage direct-current live line working, hotline maintenance applied technical field.
[accompanying drawing explanation]
Fig. 1 is for adopting the schematic diagram that enters equipotential method in preferred embodiment ± 800kV extra high voltage direct current transmission line hotline maintenance technique of the present invention.
Fig. 2 is the schematic diagram of " just carrying line " method replacing insulator string.
Fig. 3 A, 3B are respectively front view and the vertical view of changing two " V " insulator strings of straight line, firmly turning the machete card adopting in two " L " insulator string operational methods.
Fig. 4 for adopting two " V " insulator strings of machete card replacement straight line in Fig. 3, firmly turn the operation chart of two " L " insulator strings.
Fig. 5 is the schematic diagram of the operational method of " two collimation method of carrying " replacing straight line list " V ", two " V " insulator string.
Fig. 6 is for changing the operation chart of the operational method of strain insulator.
Fig. 7 A, 7B are respectively the front card of fluid pressure type closed fixture that adopts in the method for changing strain insulator and the structural representation of rear card.
Fig. 8 A, 8B are respectively the partial sectional view of triple strain card and the partial sectional view of another angle adopting in the method for changing strain insulator.
Fig. 9 is for changing the structural representation of the towing plate wing clamp adopting in the method for strain insulator.
[embodiment]
For understanding better the present invention, below with reference to accompanying drawing and instantiation, invention is described in detail.
Before technical scheme of the present invention is described in detail, first the theoretical foundation of project research is simply stated:
(1) the UHVDC Transmission Lines tower structure providing according to designing units such as China Power Engineering consultancy Group Co., Ltd, insulator serial type, gold utensil type of attachment, lead wire and earth wire arrangement and permanent way machine load level and air gap form;
(2) according to China Electric Power Research Institute ± 800kV make progress DC power transmission line overvoltage level analytical calculation and ± 800kV live line working gap experiment research, the live line work insulatings such as the extra-high voltage direct-current live line working minimum safe distance of proposition, minimum combination gap, the effective insulated lengths of instrument and effectively insulator sheet number coordinate theoretical value;
(3) according to China Electric Power Research Institute ± 800kV extra-high voltage direct-current live line working personnel safety guard Study on Measures, the live line working personnel safety guard data of submission.
In technological project of the present invention studies, ± 800kV extra-high voltage direct-current transmission engineering is being built or is just being entered to put into operation the phase, and direct-current ultra high voltage power transmission lines overhauling, live line working are operated in both at home and abroad not yet to be carried out.Although China Electric Power Research Institute has carried out a large amount of Test And Research Works in ± 800kV live line working basic technical theory, but carry out actual live line working, also need, on the basis of strict Theoretical Proof and engineering test, carry out live line working project practical research.In serious analysis ± the 800kV extra high voltage direct current transmission line design parameter that makes progress, otherness, the particularity of fully inquired into ± 800kV and electric pressure live line working before, determine ± 800kV UHVDC Transmission Lines live line work insulating coordinates parameter, has verified the concrete measure of live line working personnel protection.
First, entering equal potential working is live line working elemental operation mode, is again the basis that other live line working projects realize.First break through the difficulty that enters current potential, according to ± 800kV DC power transmission line project organization feature, the gap form of shaft tower window size and job requirements and air gap level, abandoned traditional cross-arm and hung rope ladder and vertically enter equipotential mode, research and design strain tower along two free level of operation of insulator string string, enter equipotential operational method.
Below will along two free level of operation of insulator string string, enter equipotential operational method to strain tower at length introduces.
Before entering equipotential, equipotential workman must wear a complete set of shielding clothing, comprises cap, clothing, gloves, socks and footwear, and wears shielding face shield.In addition, in shielding clothing, also should wear fire-retardant underwear.If insulator string is glass insulator, also need to wear goggles.
Equipotential workman enters equipotential after dressing according to above-mentioned dressing standard according to the following steps:
(1) along strain tower, step on tower to cross-arm place, fasten insulation protection rope and enter cross arm side hardware fitting connection place, safety belt is tied up on hand steered insulator string;
(2) after checking that shielding clothing each several part connects well, carry electric potential transferring stick and prepare to enter insulator string;
(3) while entering current potential, both hands grip a string insulator string, and both feet are stepped on another insulator string string, and trick adopts at most mode parallel across two insulators (" short by three across two ") to stopping apart from side of wire was grading ring 0.5m place most;
(4) stretch out fast electric potential transferring stick, be hooked in nearest sub-conductor or connect on gold utensil and carry out potential transfer;
(5) fasten seat belts after entering current potential, and need to determine whether to remove insulation protection rope according to operation.Operating personnel be protection rope and safety belt be to play a part two protection.Yet, because the limited length of protection rope, while entering after current potential in protection rope length range operation, can remove, such as restringing side gold utensil, grading ring etc.; But if be to farther local operation, such as restringing conductor spacer, repairing wire etc., protects the inadequate words of rope length just to need de-preservation rope, still needs to accomplish fluently protection rope during de-preservation rope backed off after random.
Enter after equipotential hotline maintenance work that can carry out ± 800kV DC power transmission line.For example, charged for replacement hammer for preventing conductor from vibration, live-line replacing strain side of wire was gold utensil, charged for replacement are adjusted lead spacer and replacing insulator under electrified etc.Hereinafter will the maintenance craft of part parts be wherein described in detail.
After hotline maintenance work completes, equipotential workman can exit equipotential as follows:
(1) after checking that shielding clothing each several part connects well, the metal end of electric potential transferring stick be hooked in to sub-conductor or connect on gold utensil, holding tight insulated handle for one, entering insulator string and apart from side of wire was grading ring 0.5m place, stop (keeping arm straight configuration);
(2) throw off rapidly electric potential transferring stick and sub-conductor or be connected the connection of gold utensil, and with it electric potential transferring stick is regained and is firmly placed on, according to trick, across the mode of two insulators (" short by three across two "), exiting equipotential at most and return to cross-arm;
(3) check on tower without after legacy, carrying insulation and transmitting the lower tower of rope.
According to the above-mentioned method that enters and exit current potential, the parts on can right ± 800kV DC power transmission line strain tower overhaul.Because the events in operation in ± 800kV DC power transmission line are many, the maintenance mode of part parts is identical with operational method before, therefore at this, does not repeat.To the emphasis method of operation of the hotline maintenance techniques such as changing tension insulator in live line be described in detail below.
First, the operational method that " the micro-collimation method of carrying of lever principle " changed to two " V " insulator strings of straight line, firmly turns two " L " insulator strings describes.
At ± 800kV extra-high voltage direct-current, make progress in engineering design, a large amount of assembling modes that adopt two " V " insulator strings and two " L " insulator strings of general part of path.When there is defect in insulator string parts, the general mechanical load that adopts " just carrying line " mode to shift insulator string, maintenance and replacing insulator string.Refer to Fig. 2, so-called " just carrying line " mode mainly refers to, with locating to reserve construction hole (or main material) directly over wire yoke plate, do fulcrum on the tower of instrument, cross arm of tower special mould clamp (or fastening means) is installed, by connection carry line apparatus (mechanical screw mandrel or hydraulic screw rod), high-strength insulating pull bar, six division line lifters are connected and are connected with wire, the mechanical load transfer system of composition insulator string.By operate machine screw mandrel or hydraulic screw rod, load transfer system is tightened up stressed, slowly wire is mentioned, make to be overhauled the load transfer of insulator string machinery to putting forward wire system, realize the maintenance of insulator string.Yet, the mechanical load of carrying lineman's utensil of the operating type of this " just carrying line " is large, may cause maintenance side insulator string horizontal direction force to diminish, thereby wire is offset round about, when and in maintenance during defective insulator string, insulator string also will adopt the wire lateral displacement measure that prevents while resetting, reset difficult with exemption from inspection insulator string.
Therefore, according to the design feature of ± 800kV extra high voltage direct current transmission line design, in this project, change two " V " insulator strings of straight line, firmly turn two " L " insulator string operations and adopt machete cards and utilize " the micro-line working system of carrying of lever principle " to shift the mechanical load of insulator string.The structure of machete card is as shown in Fig. 3 A, 3B.Incorporated by reference to consulting Fig. 4, the hook that one end of machete card matches for the core through screw rod with inverted triangle duplex plate, the other end is the opening for external screw mandrel.The waist of coupling hook and opening is provided with the platform contacting with the bottom side of inverted triangle duplex plate.The hook end of machete card has the bayonet socket that is sleeved on inverted triangle duplex plate both sides, and the root platform of bayonet socket contacts with inverted triangle duplex plate bottom side.The opening both sides of machete card are provided with the through hole that milled screw is installed, and this through hole is for external screw mandrel.The waist of machete card is also provided with groove.If need to safeguard in advance and overhaul by the gold utensil on a certain side on respect to triangle duplex plate, when first the bayonet socket of machete card being installed on to this side bottom of inverted triangle duplex plate, hook catches on the core through screw rod in inverted triangle duplex plate center, the root platform of bayonet socket holds up the pre-maintenance of inverted triangle duplex plate and one end of maintenance, the other end of inverted triangle duplex plate upper side is fulcrum like this, and openend is lever end.And then at the external screw mandrel of openend, by manual adjustment screw mandrel, openend applying to power, lever end is that opening part only need apply less strength and just the heavier load on one end of the pre-maintenance of triangle duplex plate and maintenance can be laid down like this.
Adopt machete card and utilize " the micro-line working system of carrying of lever principle " to change two " V " insulator strings of straight line, the concrete operations of operational method that firmly turn two " L " insulator strings are as follows:
(1) from tangent tower enters current potential, utilize reserved construction hole, insulator string hanging point place (or the main material in hanging point place) to do fulcrum on the tower of instrument, cross arm of tower jig is installed, and the side of wire was fulcrum that utilizes side of wire was duplex plate (L-6465S or L-8465S or Z-6450S or Z-84S) to make instrument is installed machete card;
(2) by carrying line apparatus (mechanical screw mandrel or hydraulic screw rod), high-strength insulating pull bar is connected with special mould clamp on tower, forms the mechanical load transfer system of insulator string;
(3) utilize the card of machete card to carry on the back with duplex plate contact position as fulcrum, and machete card is divided into actuation arm and motion arm, the linear deflection of proposing that line apparatus carries out small distance is proposed in operation, drive machete card motion arm to rotate, induced effect arm shifts load on insulator string, make to be overhauled the load transfer of insulator string machinery to putting forward wire system, realize the maintenance of insulator string.
In above-mentioned technique, two " V " insulator string, the live load that firmly turns two " L " insulator string machete cards are 50KN.Above-mentioned technique is owing to having utilized lever principle, the linear deflection of proposing that line apparatus carries out small distance is proposed in operation, can drive machete card motion arm to rotate, induced effect arm shifts load on insulator string, can change quickly and easily two " V " insulator strings, firmly turn two " L " insulator strings.
Next, the operational method of " two collimation method of carrying " being changed to straight line list " V ", two " V " insulator string is described.
± 800kV extra high voltage direct current transmission line is in reaching the standard grade, although general part of path plains region is on average used span larger, vertical span little mostly, so adopted in a large number the assembling form of single " V " insulator string.When need carry out insulator string maintenance, can adopt " two line mode of carrying " to shift the mechanical load of insulator string.Incorporated by reference to consulting Fig. 5, its concrete operations mode is as follows:
(1) with locating to reserve the cross-arm side fulcrum that instrument is made in construction hole (or main material) directly over wire yoke plate, cross-arm side specific purpose tool (or fastening means) is installed;
(2) by cross-arm side special mould clamp, connect high-strength insulating pull bar, hydraulic screw rod and six division line lifter and six-multiple conductors, form the wire system of putting forward of two cover independent stressed;
(3) operation hydraulic screw rod lifting lead wire shifts the mechanical load of insulator string, realizes the maintenance of insulator string.
To reaching the standard grade tangent tower when the maximum perpendicular span, the vertical mechanical load of two " V " insulator string can reach 12.26T, if adopt traditional collimation method of carrying to carry the mechanical load that line shifts insulator string, the line load of carrying of carrying the Line tool is 6.7T, and very difficult assurance meets the demands.Above-mentioned two collimation method of carrying is changed two " V " insulator strings; when bearing identical load; because of what there are two cover independent stressed, carry wire system protection; its Work tool adopting is relatively singly carried in wire system Work tool, and to bear load little; its Work tool size can be suitably less; so also just correspondingly increased the clearance distance of wire apart from cross-arm, the safety that is more conducive to live line working is carried out.In addition,, because of the size decreases of Work tool, aspect transportation, installation and raising overhaul efficiency, also there is sizable advantage.
Finally, will be described in detail changing the operational method of strain insulator.
Replacing strain insulator, insulator string are the conventional projects of power transmission lines overhauling and live line working, are also the routine works of transmission line operating maintenance.In general maintenance craft, change strain insulator, insulator string have traditional employing bottle-holding rack change strain insulator method and improve after the revolving method of putting change strain insulator method.Bottle-holding rack method is, at maintenance insulator string two ends, stringing system is installed, and thereunder place bottle-holding rack, tightening up stringing system makes insulator string avoid wire tension, then throw off linking of insulator string and wire, cross-arm, then by insulated sling, with bottle-holding rack, will overhaul insulator string and place ground, anti-work flow completes upkeep operation afterwards.Revolving the method for putting is, first with insulator string tensioning device, loosens insulator, then with the anti-insulator that leads of trailer system, side of wire was porcelain vase is thrown off, and along tower hitch point, revolves and puts porcelain vase string and put to ground to upright position again.Anti-work flow completes upkeep operation.
At ± 800kV extra high voltage direct current transmission line, make progress in DC line, strain insulator string is designed to level three string assembling modes, and general string reaches 18m, and single string weight reaches 1.5T.Although the maintenance mode that whole string is changed, adopt traditional changing strain insulator string method to carry out the tissue of construction equipment and on-the-spot practical operation all can realize technically, but as conventional maintenance, particularly take the mode of live line working overhaul or have sizable difficulty.Therefore, this project, according to the project organization of extra-high voltage direct-current engineering triple strain and the insulation form of employing (dish-type porcelain bottle insulators) of making progress, is selected the operating type of monolithic replacing.Incorporated by reference to consulting Fig. 6, its concrete operating process is as follows:
(1) utilize yoke plate (P-42S-120 type) to do fulcrum towing plate wing clamp (as shown in Figure 9) is installed, utilize insulator steel cap to do hydraulic screw rod connection wing clamp and closed fixture composition stringing system for the front card of the sub-closed fixture of fulcrum installing insulating (as shown in Figure 7A);
(2) utilize insulator steel cap to do fulcrum front card and the rear card (as shown in Fig. 7 A, 7B) of the sub-closed fixture of installing insulating respectively, with front card and the rear card of hydraulic screw rod connecting insulator closed fixture, form stringing system;
(3) block after utilizing insulator steel cap to do the sub-closed fixture of fulcrum installing insulating, utilization is done towing plate (QY-42S type), with parallel link plate (P-4215S) fulcrum, triple strain personality card (as shown in Figure 8) is installed, and with hydraulic screw rod, connects closed fixture and triple strain card composition stringing system;
(4) operation hydraulic screw rod tightens up stringing system, shifts by the mechanical load on maintenance insulator, realizes replacing and the maintenance of insulator.
By above-mentioned technique, can realize the monolithic of strain insulator is changed, guaranteed that strain insulator is convenient as the operation of routine maintenance.
In sum, of the present invention ± 800kV extra high voltage direct current transmission line hotline maintenance technique, it is domestic and international first extra-high voltage electrified operation application technical research project, completing and the application of achievement in research of project research work, has filled up the blank of domestic and international extra-high voltage direct-current live line working, hotline maintenance applied technical field.Contained ± 800kV of concrete operational method extra high voltage direct current transmission line maintenance in of the present invention ± 800kV extra high voltage direct current transmission line hotline maintenance technique, the conventional service work content of live line working, multi-joint insulator string load operational method is shifted in the micro-lifting of lever principle wherein and large-tonnage assembled hydraulic screw mandrel is applied to live line working, in the charged equal potential working method of be particularly applied to ± 800kV extra-high voltage direct-current, it is the important breakthrough of live line working applied technical field.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (9)
1. ± 800kV extra high voltage direct current transmission line hotline maintenance technique, described hotline maintenance technique comprises and enters equipotential operational method, described in enter equipotential operational method and comprise the following steps:
Equipotential workman steps on tower to cross-arm place along strain tower after dressing according to dressing standard, fastens insulation protection rope and enters cross arm side hardware fitting connection place, and safety belt is tied up on hand steered insulator string;
After checking that shielding clothing each several part connects well, carry electric potential transferring stick and prepare to enter insulator string;
While entering current potential, both hands grip a string insulator string, and both feet are stepped on another insulator string string, and trick adopts maximum mode parallels across two insulators to stopping apart from side of wire was grading ring 0.5m place;
Stretch out fast electric potential transferring stick, be hooked in nearest sub-conductor or connect on gold utensil and carry out potential transfer.
2. according to claim 1 ± 800kV extra high voltage direct current transmission line hotline maintenance technique; it is characterized in that: described, enter in equipotential operational method; equipotential workman fastens seat belts after entering current potential, and need to determine whether to remove insulation protection rope according to operation.
3. according to claim 1 ± 800kV extra high voltage direct current transmission line hotline maintenance technique, it is characterized in that: described dressing standard comprises wearing in a complete set of shielding clothing and shielding clothing wears fire-retardant underwear, and described shielding clothing comprises shielding cap, shielding clothing, screening glove, screening socks, shielding footwear and shielding face shield.
4. according to claim 3 ± 800kV extra high voltage direct current transmission line hotline maintenance technique, it is characterized in that: if described hotline maintenance technique comprises maintenance and/or the replacing of glass insulator, equipotential workman also will wear goggles before entering equipotential.
5. according to claim 1 ± 800kV extra high voltage direct current transmission line hotline maintenance technique, is characterized in that equipotential workman exits equipotential according to following steps after hotline maintenance work completes:
After checking that shielding clothing each several part connects well, the metal end of electric potential transferring stick be hooked in to sub-conductor or connect on gold utensil, holding tight insulated handle for one, entering insulator string and apart from side of wire was grading ring 0.5m place, stop (keeping arm straight configuration);
Throw off rapidly electric potential transferring stick and sub-conductor or is connected the connection of gold utensil, and with it electric potential transferring stick withdrawal is firmly placed on, trick is exited equipotential according to maximum modes across two insulators and returned to cross-arm;
On inspection tower, without after legacy, carrying insulation and transmitting the lower tower of rope.
According to described in any one in claim 1 to 5 ± 800kV extra high voltage direct current transmission line hotline maintenance technique, it is characterized in that, described hotline maintenance technique comprises the operational method of changing two " V " insulator strings of straight line, firmly turning two " L " insulator strings, and two " V " insulator strings of described replacing straight line, the operational method that firmly turns two " L " insulator strings comprise the following steps:
From tangent tower enters current potential, utilize reserved construction hole, insulator string hanging point place or the main material in hanging point place to do fulcrum on the tower of instrument, cross arm of tower special mould clamp is installed, the side of wire was fulcrum that utilizes side of wire was duplex plate to make instrument is installed machete card;
By carrying line apparatus, high-strength insulating pull bar is connected with special mould clamp on tower, forms the mechanical load transfer system of insulator string;
Utilize the card of machete card to carry on the back with duplex plate contact position as fulcrum, and machete card is divided into actuation arm and motion arm, the linear deflection of proposing that line apparatus carries out small distance is proposed in operation, drive machete card motion arm to rotate, induced effect arm shifts load on insulator string, make to be overhauled the load transfer of insulator string machinery to putting forward wire system, realize maintenance and the replacing of insulator string.
7. according to claim 6 ± 800kV extra high voltage direct current transmission line hotline maintenance technique, it is characterized in that: at two " V " insulator strings of described replacing straight line, firmly turn in the operational method of two " L " insulator strings, described side of wire was duplex plate comprises L-6465S, L-8465S, Z-6450S and Z-84S duplex plate, described in carry line apparatus and comprise mechanical screw mandrel and hydraulic screw rod.
According to described in any one in claim 1 to 5 ± 800kV extra high voltage direct current transmission line hotline maintenance technique, it is characterized in that, described hotline maintenance technique comprises the operational method of changing straight line list " V ", two " V " insulator string, and the operational method of described replacing straight line list " V ", two " V " insulator string comprises the following steps:
With the cross-arm side fulcrum of locating reserved construction hole or main material directly over wire yoke plate and do instrument, cross-arm side instrument or fastening means are installed;
By cross-arm side jig, connect high-strength insulating pull bar, hydraulic screw rod and six division line lifter and six-multiple conductors, form the wire system of putting forward of two cover independent stressed;
Operation hydraulic screw rod lifting lead wire shifts the mechanical load of insulator string, realizes maintenance and the replacing of insulator string.
According to described in any one in claim 1 to 5 ± 800kV extra high voltage direct current transmission line hotline maintenance technique, it is characterized in that, described hotline maintenance technique comprises the operational method of changing strain insulator, and the operational method of described replacing strain insulator comprises the following steps:
Utilize P-42S-120 yoke plate to do fulcrum towing plate wing clamp is installed, utilize insulator steel cap to make the front card of the sub-closed fixture of fulcrum installing insulating, with hydraulic screw rod, connect wing clamp and closed fixture composition stringing system;
Utilize insulator steel cap to do fulcrum front card and the rear card of the sub-closed fixture of installing insulating respectively, with front card and the rear card of hydraulic screw rod connecting insulator closed fixture, form stringing system;
After utilizing insulator steel cap to do the sub-closed fixture of fulcrum installing insulating, block, utilize towing plate, with parallel link plate fulcrum, triple strain card is installed, with hydraulic screw rod, connect closed fixture and triple strain card composition stringing system;
Operation hydraulic screw rod tightens up stringing system, shifts by the mechanical load on maintenance insulator, realizes replacing and the maintenance of insulator.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310617102.3A CN103618251A (en) | 2013-11-27 | 2013-11-27 | Technology for electrified overhaul of +-800kV ultrahigh voltage direct-current transmission line |
| PCT/CN2014/090447 WO2015078279A1 (en) | 2013-11-27 | 2014-11-06 | Live overhaul process for ±800 kv ultra-high voltage dc power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310617102.3A CN103618251A (en) | 2013-11-27 | 2013-11-27 | Technology for electrified overhaul of +-800kV ultrahigh voltage direct-current transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103618251A true CN103618251A (en) | 2014-03-05 |
Family
ID=50168954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310617102.3A Pending CN103618251A (en) | 2013-11-27 | 2013-11-27 | Technology for electrified overhaul of +-800kV ultrahigh voltage direct-current transmission line |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103618251A (en) |
| WO (1) | WO2015078279A1 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104218493A (en) * | 2014-08-13 | 2014-12-17 | 国家电网公司 | Process for electrified replacing of tension-resistant hard tube bus jumper insulator for +/-800kV extra-high-voltage direct-current line |
| 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 |
| CN104638566A (en) * | 2015-01-30 | 2015-05-20 | 国家电网公司 | Method for vertically entering strong electric field along insulator string and tool used by method |
| WO2015078279A1 (en) * | 2013-11-27 | 2015-06-04 | 国家电网公司 | Live overhaul process for ±800 kv ultra-high voltage dc power transmission line |
| CN105337215A (en) * | 2015-11-26 | 2016-02-17 | 国网河南省电力公司检修公司 | Tool and method for replacing earth electrode circuit corner tension-resistant hardware fitting |
| WO2016023141A1 (en) * | 2014-08-13 | 2016-02-18 | 国家电网公司 | Process for live replacement of tension hard-tube bus-bar jumper insulator of +/- 800kv ultra-high-voltage dc transmission line |
| CN105576550A (en) * | 2014-10-11 | 2016-05-11 | 国家电网公司 | Method for live-line replacement of high voltage power transmission line monolithic strain insulator |
| CN107681538A (en) * | 2017-09-12 | 2018-02-09 | 金华送变电工程有限公司 | Anti- operating personnel turns over the aid fallen on a kind of transmission of electricity strain rod tower insulator chain |
| CN108050009A (en) * | 2017-12-05 | 2018-05-18 | 华北电力大学 | A kind of high potential energy supplying system and its construction method based on insulating liquid driving |
| CN108448488A (en) * | 2018-05-25 | 2018-08-24 | 国网河南省电力公司检修公司 | 840kN grades of tension resistant four cross-arm side insulator replacement tools and method |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108206482B (en) * | 2018-01-23 | 2024-01-05 | 国网福建省电力有限公司 | Live replacement operation method for LF type yoke plate insulator without operation hole |
| CN108462106A (en) * | 2018-03-29 | 2018-08-28 | 国家电网公司 | Extra-high voltage alternating current-direct current transmission line of electricity Combined line presss from both sides electrification replacing tool and method |
| CN108512122A (en) * | 2018-06-13 | 2018-09-07 | 云南电网有限责任公司德宏供电局 | A kind of tangent tower conducting wire supporter |
| CN109217170A (en) * | 2018-08-01 | 2019-01-15 | 国网浙江省电力有限公司金华供电公司 | The replacement tool of ground electrode circuit insulator and fitting |
| CN109386158B (en) * | 2018-11-28 | 2024-02-06 | 中国电力工程顾问集团西北电力设计院有限公司 | Large-corner single-loop gate-type drilling tower for crossing |
| CN109545051A (en) * | 2018-12-12 | 2019-03-29 | 国网浙江余姚市供电有限公司 | A kind of electrical employee livewire work training device and method |
| CN109742679B (en) * | 2018-12-21 | 2024-03-29 | 国网浙江省电力有限公司杭州供电公司 | Hardware string handrail device for ultra-high voltage transmission line |
| CN109638715B (en) * | 2018-12-26 | 2024-05-10 | 国网福建省电力有限公司宁德供电公司 | Movable insulating hard ladder for live working of power transmission line and working method thereof |
| CN109742708B (en) * | 2019-03-10 | 2024-07-23 | 国网福建省电力有限公司福州供电公司 | Wind-proof galloping device for power transmission line |
| CN110147954A (en) * | 2019-05-17 | 2019-08-20 | 国网天津市电力公司 | A kind of determination method of the composite insulator the piece number for shaft tower insulation |
| CN110492384A (en) * | 2019-08-21 | 2019-11-22 | 国网宁夏电力有限公司电力科学研究院 | A kind of disengaging extra-high voltage strain rod tower insulator chain supplementary insulation bar |
| CN110601074B (en) * | 2019-10-12 | 2024-06-18 | 国网新疆电力有限公司伊犁供电公司 | Portable wire lifter |
| CN111079743A (en) * | 2019-12-04 | 2020-04-28 | 国网新疆电力有限公司乌鲁木齐供电公司 | Data acquisition method based on automatic insulator identification of unmanned aerial vehicle aerial photography data |
| CN110970851B (en) * | 2019-12-06 | 2024-04-12 | 中国电力工程顾问集团西南电力设计院有限公司 | Windproof bias-used 'shaped' hanging string |
| CN111668747B (en) * | 2020-05-08 | 2022-09-20 | 中国电力科学研究院有限公司 | Device and method for entering and exiting alternating-current extra-high voltage composite cross arm live working area |
| CN111627620B (en) * | 2020-06-29 | 2024-05-24 | 中国电力工程顾问集团西南电力设计院有限公司 | Upper-carrying type suspension V-shaped insulator string |
| CN114389058B (en) * | 2021-12-13 | 2024-07-23 | 新昌县新明实业有限公司 | Distribution overhead line earth connection articulates robot |
| CN114614399B (en) * | 2022-03-04 | 2023-10-20 | 国网浙江省电力有限公司金华供电公司 | Operating method for on-load migration tension rod |
| CN115021142A (en) * | 2022-05-06 | 2022-09-06 | 国网山东省电力公司青岛供电公司 | Tool for replacing 10kV distribution line pole top cap in live mode and replacing method |
| CN117712915B (en) * | 2023-12-05 | 2024-06-11 | 江苏恒康电力科技有限公司 | Maintenance device and maintenance method for drilling span type angle steel tower insulator |
| CN118100667B (en) * | 2024-04-18 | 2024-06-25 | 江苏江东电力器材有限公司 | High-pressure valve hall valve tower hardware fitting |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001112153A (en) * | 1997-10-24 | 2001-04-20 | Sediver Soc Europ Isolateurs En Verre & Composite | Lightning arrester assembly for aerial line equipped with device for informing user of function trouble of the lightning arrester |
| CN101227068A (en) * | 2007-12-27 | 2008-07-23 | 国网武汉高压研究院 | Equipotential access method of alternating current ultra / super high-tension line live-line work and electric potential transferring stick |
| CN102136695A (en) * | 2010-12-28 | 2011-07-27 | 河北省电力公司超高压输变电分公司 | Overhauling tool used for +/-660kV direct-current transmission line |
| CN102403672A (en) * | 2011-08-30 | 2012-04-04 | 国网电力科学研究院 | Super/ultrahigh voltage alternating and direct-current mixed compression line live-line work equipotential transfer safety method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004171946A (en) * | 2002-11-20 | 2004-06-17 | Chubu Electric Power Co Inc | Replacing method of whole or part of insulation device, and supporting device used for the method |
| CN201629517U (en) * | 2009-12-15 | 2010-11-10 | 湖北省电力公司超高压输变电公司 | Large knife card of direct-current extra-high voltage line insulator string |
| CN202014054U (en) * | 2010-12-28 | 2011-10-19 | 河北省电力公司超高压输变电分公司 | Overhaul tool for dead end insulator on +/- 660kV DC power transmission line |
| CN202014055U (en) * | 2010-12-28 | 2011-10-19 | 河北省电力公司超高压输变电分公司 | Overhauling device of V-shaped double-string insulator for +-660KV direct current transmission line |
| CN103618251A (en) * | 2013-11-27 | 2014-03-05 | 国家电网公司 | Technology for electrified overhaul of +-800kV ultrahigh voltage direct-current transmission line |
-
2013
- 2013-11-27 CN CN201310617102.3A patent/CN103618251A/en active Pending
-
2014
- 2014-11-06 WO PCT/CN2014/090447 patent/WO2015078279A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001112153A (en) * | 1997-10-24 | 2001-04-20 | Sediver Soc Europ Isolateurs En Verre & Composite | Lightning arrester assembly for aerial line equipped with device for informing user of function trouble of the lightning arrester |
| CN101227068A (en) * | 2007-12-27 | 2008-07-23 | 国网武汉高压研究院 | Equipotential access method of alternating current ultra / super high-tension line live-line work and electric potential transferring stick |
| CN102136695A (en) * | 2010-12-28 | 2011-07-27 | 河北省电力公司超高压输变电分公司 | Overhauling tool used for +/-660kV direct-current transmission line |
| CN102403672A (en) * | 2011-08-30 | 2012-04-04 | 国网电力科学研究院 | Super/ultrahigh voltage alternating and direct-current mixed compression line live-line work equipotential transfer safety method |
Non-Patent Citations (3)
| Title |
|---|
| ***: "《特高压直流输电技术研究成果专辑》", 31 October 2011, article "特高压直流输电工程运行技术" * |
| 耿波: "陕西地区大范围开展750kV带电作业管理研究", 《电网与清洁能源》, no. 12, 31 December 2012 (2012-12-31) * |
| 胡毅，刘凯等: "《超/特高压交直流输电线路带电作业》", 31 December 2011, article "直流输电线路带电作业" * |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015078279A1 (en) * | 2013-11-27 | 2015-06-04 | 国家电网公司 | Live overhaul process for ±800 kv ultra-high voltage dc power transmission line |
| WO2016023141A1 (en) * | 2014-08-13 | 2016-02-18 | 国家电网公司 | Process for live replacement of tension hard-tube bus-bar jumper insulator of +/- 800kv ultra-high-voltage dc transmission line |
| CN104218493B (en) * | 2014-08-13 | 2017-03-01 | 国家电网公司 | ± 800kV UHVDC Transmission Lines live-line replacing strain hard tube mother's wire jumper insulator technique |
| CN104218493A (en) * | 2014-08-13 | 2014-12-17 | 国家电网公司 | Process for electrified replacing of tension-resistant hard tube bus jumper insulator for +/-800kV extra-high-voltage direct-current line |
| CN105576550A (en) * | 2014-10-11 | 2016-05-11 | 国家电网公司 | Method for live-line replacement of high voltage power transmission line monolithic strain insulator |
| CN105576550B (en) * | 2014-10-11 | 2018-08-14 | 国家电网公司 | A kind of charged for replacement UHV transmission line single chip tension insulator method |
| CN104638566A (en) * | 2015-01-30 | 2015-05-20 | 国家电网公司 | Method for vertically entering strong electric field along insulator string and tool used by method |
| CN104638566B (en) * | 2015-01-30 | 2016-06-29 | 国家电网公司 | Vertical type enters method and the used tool of highfield along insulator chain |
| 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 |
| CN105337215A (en) * | 2015-11-26 | 2016-02-17 | 国网河南省电力公司检修公司 | Tool and method for replacing earth electrode circuit corner tension-resistant hardware fitting |
| CN105337215B (en) * | 2015-11-26 | 2018-11-02 | 国网河南省电力公司检修公司 | A kind of tool and method for replacing ground electrode circuit corner strain hardware fitting |
| CN107681538A (en) * | 2017-09-12 | 2018-02-09 | 金华送变电工程有限公司 | Anti- operating personnel turns over the aid fallen on a kind of transmission of electricity strain rod tower insulator chain |
| CN108050009A (en) * | 2017-12-05 | 2018-05-18 | 华北电力大学 | A kind of high potential energy supplying system and its construction method based on insulating liquid driving |
| CN108050009B (en) * | 2017-12-05 | 2019-10-01 | 华北电力大学 | A kind of high potential energy supplying system and its construction method based on insulating liquid driving |
| CN108448488A (en) * | 2018-05-25 | 2018-08-24 | 国网河南省电力公司检修公司 | 840kN grades of tension resistant four cross-arm side insulator replacement tools and method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015078279A1 (en) | 2015-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103618251A (en) | Technology for electrified overhaul of +-800kV ultrahigh voltage direct-current transmission line | |
| CN103618249A (en) | technology for electrified overhaul of +-500kV double-circuit direct-current power transmission lines on same tower | |
| CN101640391B (en) | Live-wire operation method for replacing insulator for 35kV distribution circuit | |
| WO2012088987A1 (en) | Maintenance tool for insulator of direct current transmission line | |
| CN102185265B (en) | Construction method for replacing cross arm of 35kV line linear rod | |
| CN102136693B (en) | Method and device for realizing long-distance equal electric potential access of winch hanging basket guide rail | |
| CN103618252A (en) | Operation method for replacing tension insulator for 35kV overhead line in electrified mode | |
| CN104299489B (en) | Super-pressure and extra-high voltage hybrid multifunctional transmission line of electricity training set | |
| CN207067191U (en) | Rotatable Labor-saving isolator detecting support bar | |
| CN104505763B (en) | UHVDC Transmission Lines charged for replacement duplex V string composite insulator operational methods | |
| CN205786901U (en) | Insulator detecting robot | |
| CN104752996A (en) | Method for live replacement of tension duplex whole-string insulators of 330kV power transmission line | |
| CN103441445A (en) | 760kN disc-shaped insulator clamp | |
| CN201466574U (en) | Device for isoelectrically replacing insulator and accessory of iron tower of transmission line | |
| CN104242153B (en) | Change UHVDC Transmission Lines anchor support monolithic 550kN glass insulator construction technologies | |
| CN203367880U (en) | 760kN disk-shaped insulator holder | |
| CN205882560U (en) | Special circulation cord rack device of distribution live working earth potential | |
| CN103618250A (en) | Operating method for electrified replacement of double-V double-L insulator chains of extra-high voltage circuit | |
| CN101567529B (en) | Lifting ladder hook for insulated pulling materials | |
| CN208401405U (en) | 220kV conductors on quad bundled V-type replacing insulator string tool | |
| CN201332246Y (en) | Large-tonnage conducting wire lifter | |
| CN102290738B (en) | Construction method for replacing 35kV line tension pole cross arm | |
| CN110011218B (en) | Method for replacing strain insulator string of 10kV distribution network | |
| CN105762702A (en) | Method for replacing L-shaped insulator string of +/-800kV direct current transmission line | |
| CN209217575U (en) | A kind of wire jumper studies for a second time courses one has flunked job platform |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140305 |
|
| RJ01 | Rejection of invention patent application after publication |