CN103606854A - Operating method for replacing tension insulator on super and ultra-high voltage direct current transmission line in electrified mode - Google Patents

Operating method for replacing tension insulator on super and ultra-high voltage direct current transmission line in electrified mode Download PDF

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Publication number
CN103606854A
CN103606854A CN201310616143.0A CN201310616143A CN103606854A CN 103606854 A CN103606854 A CN 103606854A CN 201310616143 A CN201310616143 A CN 201310616143A CN 103606854 A CN103606854 A CN 103606854A
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CN
China
Prior art keywords
insulator
clamp
card
super
strain
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
Application number
CN201310616143.0A
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Chinese (zh)
Inventor
刘越
汤正汉
刘继承
张珣
李明
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State Grid Corp of China SGCC
Maintenance Branch of State Grid Hubei Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Maintenance Branch of State Grid Hubei Electric Power Co Ltd
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Application filed by State Grid Corp of China SGCC, Maintenance Branch of State Grid Hubei Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201310616143.0A priority Critical patent/CN103606854A/en
Publication of CN103606854A publication Critical patent/CN103606854A/en
Pending legal-status Critical Current

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Abstract

The invention provides an operating method for replacing a tension insulator on a super and ultra-high voltage direct current transmission line in an electrified mode. The method comprises the following steps that a wing-shaped clamp is installed with a connecting plate as a pivot, a front clamp of an insulator closed clamp is installed with an insulator steel cap as a pivot, and the wing-shaped clamp is connected with the insulator closed clamp through a hydraulic lead screw to form a wire tensioning system; a tension resisting clamp is installed with a traction plate and a parallel hanging plate as pivots, a back clamp of the closed clamp is installed with the insulator steel cap as the pivot, and the tension resisting clamp and the insulator closed clamp are connected through a hydraulic lead screw assembly to form a wire tensioning system; the front clamp and the back clamp of the insulator closed clamp are respectively installed with the insulator steel cap as the pivot and are connected through the hydraulic lead screw to form a wire tensioning system; the wire tensioning systems are tensioned by operating the hydraulic lead screw, and a mechanical load on an insulator to be maintained is transferred. A single sheet of the tension insulator on the super and ultra-high voltage direct current transmission line can be replaced, and the operation convenience is guaranteed for regularly maintaining a tension insulator string.

Description

The operational method of super, UHVDC Transmission Lines changing tension insulator in live line
[technical field]
The present invention relates to extra-high voltage electric transmission and transformation field, relate in particular to a kind of operational method of super, UHVDC Transmission Lines changing tension insulator in live line.
[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.
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.
± 500kV common-tower double-return line tension insulator string is designed to horizontal glass insulator or porcelain rod insulator duplex string assembling mode.Wherein glass string minimum (Qing Wu district) 40, reaches 10.737 meters, and single string weight reaches 0.73T, and maximum (Chong Wu district) 57, reaches 14.222 meters, single about 0.97T that weighs that goes here and there; Porcelain rod insulator string forms by 7, reaches 14.772 meters, the heavily about 0.95T of single string.
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 adopts 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.
[summary of the invention]
In view of this, for overcoming the deficiencies in the prior art, be necessary to provide a kind of and be applicable to surpass, the operational method of UHVDC Transmission Lines changing tension insulator in live line.
An operational method for super, UHVDC Transmission Lines changing tension insulator in live line, comprises the following steps: from strain tower, enter equipotential; Utilize yoke plate to do fulcrum 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 insulator closed card composition stringing system; Utilize towing plate and parallel link plate to do fulcrum strain clamped is installed, utilize insulator steel cap to do after fulcrum is installed closed fixture and block, with hydraulic screw rod assembly, connect strain clamped and insulator closed card 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; Operation hydraulic screw rod tightens up stringing system, shifts by the mechanical load on maintenance insulator; Pull down the insulator of Awaiting Overhaul.
In at least one embodiment, described yoke plate is P-42S-120 type or LS-84600500S type therein.
In at least one embodiment, described towing plate is QY-42S type therein, and described parallel link plate is P-4215S or P-42S type.
In at least one embodiment, described wing clamp is towing plate wing clamp or side of wire was wing clamp therein.
In at least one embodiment, described strain clamped is triple strain card or cross-arm side strain clamped therein.
In at least one embodiment, after described composition wire inlet system step, also comprise the step of installing for means of transportation and insulator tripod assembly therein.
Operational method super, UHVDC Transmission Lines changing tension insulator in live line of the present invention adopts single operating type of only changing, can realize the list of strain insulator in super, extra high voltage direct current transmission line is only changed, guarantee the operation convenient degree of strain insulator string as routine maintenance.
[accompanying drawing explanation]
Fig. 1 is the operation chart of the operational method of changing tension insulator in live line in the preferred embodiments of the present invention ± 800kV extra high voltage direct current transmission line.
Fig. 2 is the structural representation of towing plate wing clamp employed in figure 1.
Fig. 3 A, 3B are respectively the structural representation of the front card of fluid pressure type closed fixture employed in figure 1 and rear card.
Fig. 4 A, 4B are respectively the partial sectional view of triple strain card employed in figure 1 and the partial sectional view of another angle.Structural representation.
Fig. 5 is the operation chart of the operational method of live-line replacing strain rod porcelain insulator in another preferred embodiment ± 500kV common-tower double-return DC line of the present invention.
Fig. 6 A, 6B are respectively the partial sectional view of cross-arm side strain clamped employed in figure 5 and the partial sectional view of another angle.
Fig. 7 A, 7B are respectively the structural representation of the front card of fluid pressure type closed fixture employed in figure 1 and rear card.
Fig. 8 is the structural representation of side of wire was wing clamp employed in figure 5.
[embodiment]
For understanding better the present invention, below with reference to accompanying drawing and instantiation, invention is described in detail.
According to super, the double strain of UHVDC Transmission Lines engineering,, the insulation form of the project organization of triple strain and employing, the invention provides the operating type that a kind of list only changes and change strain insulator, thereby reach the object of changing insulator string.
Incorporated by reference to consulting Fig. 1, it for changing the schematic diagram of strain insulator in ± 800kV extra high voltage direct current transmission line, and its concrete operating process is as follows:
(1) from strain tower, enter equipotential;
(2) utilize yoke plate (P-42S-120 type) to do fulcrum towing plate wing clamp (as shown in Figure 2) 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 Fig. 3 A);
(3) utilize insulator steel cap to do fulcrum front card and the rear card (as shown in Fig. 3 A, 3B) 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;
(4) 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 card (as shown in Fig. 4 A, 4B) is installed, and with hydraulic screw rod, connects closed fixture and triple strain card composition stringing system;
(5) operation hydraulic screw rod tightens up stringing system, shifts by the mechanical load on maintenance insulator;
(6) pull down the insulator of Awaiting Overhaul.
Incorporated by reference to consulting Fig. 5, it is ± 500kV common-tower double-return DC line in the schematic diagram of charged for replacement rod porcelain insulator, its concrete operating process is as follows:
(1) from strain tower, enter equipotential;
(2) utilize towing plate (QY-42S type) and parallel link plate (P-42S) to do fulcrum cross-arm side strain clamped (as shown in Fig. 6 A, 6B) is installed, utilize porcelain rod insulator steel cap to do after fulcrum is installed closed fixture and block (as shown in Fig. 7 B), with hydraulic screw rod assembly, connect strain clamped and closed fixture composition stringing system, then tripod assembly is installed for means of transportation and insulator;
(3) utilize front and back rod insulator steel cap to make front card and the rear card (as shown in Fig. 7 A, 7B) that fulcrum is installed respectively closed fixture, the front card and the rear card that with hydraulic screw rod assembly, connect closed fixture form stringing system, then tripod assembly are installed for means of transportation and insulator;
(4) utilizing insulator steel cap to do before fulcrum is installed closed fixture blocks, utilize yoke plate (LS-84600500S type) to make fulcrum conducting wire lateral wing type card (as shown in Figure 8), with hydraulic screw rod assembly, connect closed fixture and side of wire was wing clamp formation stringing system, then tripod assembly is installed for means of transportation and insulator;
(5) operation hydraulic screw rod tightens up stringing system, shifts by the mechanical load on maintenance porcelain rod insulator;
(6) pull down the insulator of Awaiting Overhaul.
By above-mentioned technique, can realize the monolithic (only single) of strain insulator string in super, extra high voltage direct current transmission line is changed, guaranteed the operation convenient degree of strain insulator string as routine maintenance.
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 (6)

1. an operational method for super, UHVDC Transmission Lines changing tension insulator in live line, comprises the following steps:
From strain tower, enter equipotential;
Utilize yoke plate to do fulcrum 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 insulator closed card composition stringing system;
Utilize towing plate and parallel link plate to do fulcrum strain clamped is installed, utilize insulator steel cap to do after fulcrum is installed closed fixture and block, with hydraulic screw rod assembly, connect strain clamped and insulator closed card 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;
Operation hydraulic screw rod tightens up stringing system, shifts by the mechanical load on maintenance insulator;
Pull down the insulator of Awaiting Overhaul.
2. the operational method of super, UHVDC Transmission Lines changing tension insulator in live line according to claim 1, is characterized in that: described yoke plate is P-42S-120 type or LS-84600500S type.
3. the operational method of super, UHVDC Transmission Lines changing tension insulator in live line according to claim 1, is characterized in that: described towing plate is QY-42S type, and described parallel link plate is P-4215S or P-42S type.
4. the operational method of super, UHVDC Transmission Lines changing tension insulator in live line according to claim 1, is characterized in that: described wing clamp is towing plate wing clamp or side of wire was wing clamp.
5. the operational method of super, UHVDC Transmission Lines changing tension insulator in live line according to claim 1, is characterized in that: described strain clamped is triple strain card or cross-arm side strain clamped.
6. according to the operational method of super, the UHVDC Transmission Lines changing tension insulator in live line described in any one in claim 1 to 5, it is characterized in that: after described composition wire inlet system step, also comprise the step of installing for means of transportation and insulator tripod assembly.
CN201310616143.0A 2013-11-27 2013-11-27 Operating method for replacing tension insulator on super and ultra-high voltage direct current transmission line in electrified mode Pending CN103606854A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104077947A (en) * 2014-07-24 2014-10-01 国家电网公司 Simple operation ability training bench for line workers
CN104201602A (en) * 2014-07-25 2014-12-10 国网上海市电力公司 Charged replacement method for whole string of insulators of ultra-high-voltage transmission line, and hardware fitting thereof
CN104201606A (en) * 2014-07-25 2014-12-10 国网上海市电力公司 Separating clamp for 500KV strain insulator string
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
CN104300435A (en) * 2014-10-22 2015-01-21 国家电网公司 Wire tightener used for replacing double insulator strings
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
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
CN110011218A (en) * 2019-03-28 2019-07-12 国网浙江慈溪市供电有限公司 A kind of replacing options of 10kV distribution strain insulator string

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CN201484214U (en) * 2009-06-04 2010-05-26 华北电网有限公司廊坊供电公司 General-purpose wing type clamp apparatus capable of live-line replacing strain single insulator
CN201611749U (en) * 2010-02-10 2010-10-20 云南电网公司昆明供电局 Secondary protector for 35kV-110kV for charged changing tension-resisting insulator chain
CN102064490A (en) * 2009-11-18 2011-05-18 甘肃省电力公司兰州超高压输变电公司 Carbon fiber fixture for replacing insulator on 750-kV line and manufacturing method thereof
CN203150997U (en) * 2013-03-07 2013-08-21 江苏省电力公司检修分公司 Tool for live replacement of middle-phase vertical string insulator of power transmission line

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CN201484214U (en) * 2009-06-04 2010-05-26 华北电网有限公司廊坊供电公司 General-purpose wing type clamp apparatus capable of live-line replacing strain single insulator
CN102064490A (en) * 2009-11-18 2011-05-18 甘肃省电力公司兰州超高压输变电公司 Carbon fiber fixture for replacing insulator on 750-kV line and manufacturing method thereof
CN201611749U (en) * 2010-02-10 2010-10-20 云南电网公司昆明供电局 Secondary protector for 35kV-110kV for charged changing tension-resisting insulator chain
CN203150997U (en) * 2013-03-07 2013-08-21 江苏省电力公司检修分公司 Tool for live replacement of middle-phase vertical string insulator of power transmission line

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104077947A (en) * 2014-07-24 2014-10-01 国家电网公司 Simple operation ability training bench for line workers
CN104077947B (en) * 2014-07-24 2016-02-24 国家电网公司 The simple and easy practical traning platform of a kind of linemen's' manipulative ability
CN104201602A (en) * 2014-07-25 2014-12-10 国网上海市电力公司 Charged replacement method for whole string of insulators of ultra-high-voltage transmission line, and hardware fitting thereof
CN104201606A (en) * 2014-07-25 2014-12-10 国网上海市电力公司 Separating clamp for 500KV strain insulator string
CN104201602B (en) * 2014-07-25 2016-08-31 国网上海市电力公司 A kind of UHV transmission line bunch of insulator charged for replacement method and gold utensil thereof
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
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
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
CN104300435A (en) * 2014-10-22 2015-01-21 国家电网公司 Wire tightener used for replacing double insulator strings
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
CN110011218A (en) * 2019-03-28 2019-07-12 国网浙江慈溪市供电有限公司 A kind of replacing options of 10kV distribution strain insulator string
CN110011218B (en) * 2019-03-28 2020-10-27 国网浙江慈溪市供电有限公司 Method for replacing strain insulator string of 10kV distribution network

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Application publication date: 20140226

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