RU2594197C1 - Method of erecting high-voltage overhead transmission line and high-voltage overhead power transmission line, built using said method - Google Patents

Method of erecting high-voltage overhead transmission line and high-voltage overhead power transmission line, built using said method Download PDF

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RU2594197C1
RU2594197C1 RU2015124765/05A RU2015124765A RU2594197C1 RU 2594197 C1 RU2594197 C1 RU 2594197C1 RU 2015124765/05 A RU2015124765/05 A RU 2015124765/05A RU 2015124765 A RU2015124765 A RU 2015124765A RU 2594197 C1 RU2594197 C1 RU 2594197C1
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electric wire
high
tension
line
machine
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Вера Сергеевна Субботина
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Вера Сергеевна Субботина
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Abstract

FIELD: electrical engineering.
SUBSTANCE: group of inventions relates to electrical engineering, more specifically to high-voltage overhead lines and power transmission networks of type high VVL 110-220, ultrahigh voltage class VVL 220-330; 330-750 and ultra-high voltage class above 750 kV and methods of their erection, operation and transportation of electric power. High-voltage overhead line of a high-voltage power network includes mounted on foundations tower supports with traverses, insulators, terminal and trunnion-type clamps which do not damage cover and a set of high-temperature composite electric wires fixed therein, each of which comprises a core with at least one composite strand and multi-strand layer. High-voltage overhead line is mounted during erection or operational repair, reconstruction, restoration based on a method, providing process and operation undamageability of said electric wires by means of complex developed mounting-process equipment and application for laying electric wires of line of individual length equal to full anchor factory length of line or its mounting section, which prevents additional losses of transmitted electric power in electric wire joints, number of which is minimised.
EFFECT: process solutions, providing said technical result, include mounting with expansion of electric wire through tensioner and provision of technological tension of electric wire using a tensioner, use of expansion rollers with nondamaging bed, for example, equipped with rubber layer, and exact regulation of minimum radii of reels with factory winding of electric wire and reels of tensioner from condition of nondamaging high-efficient low-consumption material and reduced resistance per unit of transmitted electric power.
2 cl, 8 dwg

Description

The invention relates to electrical engineering, specifically to high-voltage overhead lines, power transmission networks, methods for their construction and operation.

A high-voltage overhead power transmission line is known, including foundations, high-rise supports with traverses, on which electrical insulators are placed with multicore current-carrying wires suspended by tension and supporting clamps, while current-carrying wires are made from a combination of aluminum and steel wires, from which the core and multicore external are formed having twisted (see. Handbook of electrical installations of high voltage. M .: Energoizdat, 1981, pp. 342-426).

There is a well-known high voltage power transmission line, including a large span between supports when crossing a wide natural obstacle, foundations with mounted anchor high-rise supports with traverses on which electrical insulators, tension and support clamps are suspended, in which live conductors are mounted (see Patent RU 2360345).

There is a method of erecting a high-voltage overhead power transmission line, including installation of foundations, erection of high-altitude anchor supports with traverses on them, suspension of insulators, tension and support clamps, mounting devices for pulling a leader cable and multicore current-carrying wires (see ibid., Patent RU 2360345) .

The disadvantages of the known high-voltage overhead power transmission lines and the methods of erecting a high voltage line are the increased material consumption of the current-carrying wires per unit voltage and the design capacity of the line, which is due to the relatively low efficiency of electric power transportation, as well as the increased labor intensity and low reliability, which does not ensure the integrity of the current-carrying wires during their broaching and securing the clamps of the supports during installation and subsequent operation.

The problem solved by the group of inventions, united by a single creative concept, is to develop a constructive system and technologies for the efficient transport of electricity with phase high-temperature composite electric wires by erecting and operating high-voltage overhead lines and power transmission networks providing maximum damage to the electric wires, including their protective shells and the integrity of the multicore structure at all stages of the preparation, laying of wires and the subsequent before Electricity during the operation of the power line.

The task in terms of the method of construction of high-voltage overhead transmission lines of ultra-high voltage VVL 110 ÷ 220 kV is solved by the fact that according to the invention the specified line is erected on high-rise supports with the placement of a current-carrying part, comprising at least one phase high-temperature electrical wire containing a core, not less than than with one composite residential and multi-core external wire, and the work on the construction of the line is carried out on the construction site with a length equal to the length of the specified line or parts of it, for this purpose, they prepare the route of the construction line, install the foundations, high-rise supports, equip the front and the final support, respectively, the head and final construction and installation sites, on each of which at least one anchor is carried out in the alignment of the constructed transmission line; on the main construction site, a mobile platform is fixedly removably fixed on the anchor with a rolling unit mounted on it with fixation in technological sequence, having a brake and an axis, on which a drum with a phase electric wire of an individual length of at least the full anchor construction length of the specified VVL is horizontally mounted, or its installation site; in addition, a brake machine with a brake drum is mounted on said platform, the drum being equipped with an electric wire of at least a full anchor length of said construction section; the axis of the said unit is mounted on the platform normally to the vertical plane of the span of the erected line, and the drum is hung on the axis of the expansion unit with the possibility of upper rolling and with the vanishing point of the electric wire from the drum above the hinge axis; and also install a brake machine with the possibility of perceiving the load from the tension of the electric wire, on another of the mentioned sites similarly mount a tension machine with the possibility of hanging a drum with a leader cable on it; both braking and tensioning machines are located on these sites with the possibility of supplying the electric wire to the first and leaving the last support at an angle to the horizon α≤30 °, similarly, the leader cable is taken with the total or total length of at least the aforementioned individual length of the electric wire; high-rise supports are mounted with traverses designed in compliance with the conditions for minimizing the interaction of operational electromagnetic fields of electrical wires, at least to an acceptable level; install electrical insulators on the traverses and hang tension and / or supporting clamps for electrical wires to them, observing the condition of their greatest mutual distance in the traverse field of the support; set the end and intermediate rolling rollers, which for this purpose are made with a profiled bed equipped with an additional outer contact layer of elastically deformable material, the outer surface part of which is made with reduced abrasion and hardness lower than the hardness of the outer layer of the wires of the external coil of the electric wire by an amount sufficient to ensure installation -technological and operational damage from contact with the specified bed, and the rest of the deep part of the thickness of which made with a lower density and increased elasticity, including growing to the profiled bed, and, in addition, the inner surface of the specified additional outer contact layer is endowed with increased adhesion to the main material of the bed of the technological rolling roller of the tension and supporting clamps of the electric wire, as well as the shear strength of the adhesive the contact of the layers is not lower than the shear resistance of the material of the additional layer in the zone of abutment to the surface of the profiled bed, the working profile of which about adopted depth, width and / or reduced radius not less than one and a half times greater than the overall radius of the cross section of the laid electric wire; they are passed through the expansion rollers in the direction to the leader-leader site of the cable, connect it at one end to the electric wire being laid at the outlet of the brake machine, and fasten the other end to the tension machine and lay the electric wire along the expansion rollers with a technological tension of not more than 0 , 65 on the tensile strength of the electric wire and the minimum bending radius on the rollers, the radius of which take at least 40 overall diameters of the electric wire; after which, under technological tension, the mounted electric wire is reassigned and fixed in the operational tension and / or supporting clamps, while at the time of construction of an overhead power transmission line, the minimum bending radius of the electric wire on the rolling rollers on high-rise supports is at least one turn in plan at an angle α in the range 50≤α≤60 ° provide, using rollers with a diameter along the bottom of the bed of the rolling roller, at least 60 overall radii of the electric wire, and as an elastically deformable layer Ms. rollers are made, for example, rubberized with variable porosity, increasing with the depth of the layer, and the external contact surface is hardened with epoxy resin with a hardener, and if there are one or more angular supports in the line with a rotation angle of more than 60 °, rollers are used in the same version with a minimum diameter at least 1000 mm or use tandems of two or more rollers with a non-damaging electrical bed with the possibility of mounting the tandem to a support, preferably through one point, and for laying an electric wire and, as a leader cable, they use a twisted rope with parallelly laid supporting strands in a protective sheath or in a tubular cross-stitch shirt having a length corresponding to the construction length of the electric cable plus at least six heights to the point of suspension of the indicated electric cable, and a multicore cable is used as the leader cable a braided metal cable of a cross twist, while the installation of the leader cable is carried out only on disconnected air lines, and the leader cable in areas near the brake and / or tension the tires are equipped with a roller earthing switch, the drum with the leader cable is placed on the tensioning machine and the specified cable is fed to the installation site in reverse mode, pulling it with a tensioning, for example, hydraulic mechanism, and under minimum tension it is fed to the rolling rollers, connecting after laying with the end of the electric wire at the brake machine, and the pulling of the electric wire starts at a minimum speed of 5 m / min, and after passing the first support of the power line, they increase the pulling speed to 100 m / min, while at the beginning of the process the brake machine is put into operation, which starts releasing the wire, increasing the sag, then turn on the tensioning machine and pulling, while installation work on laying the electric wire is performed using a tensioning machine, which is equipped with a winch with a smoothly varying speed of pulling, reverse device, device changes in traction, a limiter of a given maximum tension and a capstan, while the capstan has a diameter less than the diameter of the drum of the brake machine and is intended for us only the leader cable and the brake machine are equipped with a smooth control of the braking force, which ensures the regulation of the tension and the sag of the electric wire, and, in addition, the specified machine is equipped with a double brake drum with a diameter exceeding the minimum allowed by the condition of non-destructive bending of the electric wire containing composite conductors ; at the same time, the operation of the brake and tensioning machines is automatically coordinated with the provision of the required tension in the entire permissible range of speeds for pulling the electric wire.

The problem in part of the high-voltage overhead line VVL power transmission network is solved by the fact that the high-voltage overhead power transmission line of high class voltage VVL (110 ÷ 220) kV erected as described above.

The technical result achieved by the group of inventions consists in the development of a high-voltage overhead power transmission line of a high class of voltage of VVL (110 ÷ 220) kV with improved efficiency due to the use of high-temperature composite electric wires and the required set of technological operations, installation of VVL, as well as design solutions of technological equipment for use in the construction of a high-voltage overhead line with the highest integrity of high-temperature composite elec pipelines from both installation and operational impacts, which is achieved by the invention of a set of mounting machines, assemblies mounted on a mobile transformable technological platform, methods of operation, parameters of electrical wires and equipment parts with which they interact during installation and operation as part of an air power lines.

Preservation of high-performance characteristics of the mounted electrical wires is also achieved by their seamless execution within the assembly area of the high-voltage overhead power transmission line, by pulling them in compliance with the allowable tension and bending angles for the brakes of the brake machine and the rolling rollers.

The safety of the sheaths and the entire construction of the wire also increases the introduction of an elastic flexible layer in the elements of equipment and suspension with which the wire is in contact at all stages of installation and operation as part of a high-voltage overhead power transmission line.

The invention is illustrated by drawings, where:

in FIG. 1 shows the HVL of a high-voltage power transmission network with technological equipment for its construction;

in FIG. 2 - suspension of current-carrying wires on the cross-arms of the VVL supports of the high-voltage power transmission network:

in FIG. 3 - drum with an electric wire in the phase of installation on the rolling unit, front view;

in FIG. 4 - linkage of a drum to a rolling unit with an upper rolling of a high-temperature composite electric wire;

in FIG. 5 - mounting connection of an electric wire with a leader cable;

in FIG. 6 - a rolling roller with a bed made with a non-damaging composite electrical wire layer, an axial section;

in FIG. 7 - tension clamp assembled, mounted on an electrical wire;

in FIG. 8 is a diagram illustrating a transfer of an electric wire from an assembly expansion roller to a support clip.

In the method of construction, a high-voltage overhead power line 1 (HVL) power transmission is erected on high-rise supports 2 with the placement of a current-carrying part, comprising at least one phase high-temperature electrical wire 3, containing a core with at least one composite core and a multi-core external wire (not shown conventionally not shown ) Work on the construction of line 1 is carried out on the construction site with a length equal to the length of the specified line or part thereof. To do this, prepare the route of the constructed VVL, install the foundations, equip the front 4 and the final construction and installation sites 5, respectively, in front of the first and last support 2, on the first platform 4, sequentially install in the alignment of the constructed VVL with rigid fixation on the anchor with the possibility of loading tension of the wire 3 mobile platform mounted on it with rigid fixation in the technological sequence of the rolling unit 8 type rolling goat, having a brake and an axis 7 for drum weights with an individual electric wire length, as well as with a brake machine 9. This platform is equipped with two types of transformable supports - mobile for transportation to the place of installation of electric wires and stationary, additionally fixing the platform for the period of installation work on laying electric wires. Similarly, a mobile transformable platform with a mounted tensioning machine 10, equipped with a drum 11 with a leader cable 12, at least an individual length of the laid high-temperature electric wire 3 is delivered to the installation site of the VVL and fixed at the final site.

The electric wire 3 is adopted with an individual length of not less than the full anchor construction length of the above-mentioned construction site. The brake machine 9 is made and mounted on a mobile platform with the ability to absorb the load from the tension of the electric wire 3. The axis 7 of the rolling unit 8 and the axis of the brake machine 9 are located on the mobile platform fixed in the mounting position and normal to the vertical plane of the span of the constructed power transmission line 1. It is mounted on axis 7 drum 6 with the possibility of upper rolling and with the vanishing point of the electric wire 3 from the drum 6 above the hinge axis.

On site 5, a tensioning machine 10 with a drum 11 mounted on it with a leader cable 12 is similarly mounted on a mobile transformable platform. Both machines, brake 9 and tensioning 10, are located on the indicated mobile platforms on platforms 4 and 5 with the possibility of supplying electric wire to the first and the exit from the last support, at an angle to the horizon α≤30 °, using electric wires 3 individual for a given construction and installation section of length — not less than the full anchor construction length of the specified section. Similarly, the leader cable 12 is received with the total or cumulative length of at least the mentioned individual length of the electric wire 3. The high-rise supports 2 are mounted with traverses 13 designed with the condition of minimizing the interaction of operational electromagnetic fields of the electric wires 3, at least to an acceptable level. Electrical tracers 13 are mounted on traverses 13 and suspended to them are tension 14 and / or supporting clamps 15 for electrical wires 3, observing the condition of their greatest mutual distance in the traverse field of the support. Set the end 16 and intermediate 17 rolling rollers, which for this purpose are made with a profiled bed 18, at least the outer contact layer 19 of which is made of elastically deformable material with a hardness lower than the hardness of the outer layer of the wires of the external coil of the electric wire 3 by an amount sufficient to ensure installation -technological damage to the electric wire 3 in contact with the specified bed 18. The external working profile of the bed 18 is adopted by the depth, width and / or reduced radius, not less than one and a half times p roaring the overall radius of the cross section of the laid type of electric wire 3. On the expansion rollers 16, 17 in the direction of the head 4 of the construction and installation site, the leader cable 12 is pulled, connected at one end to the laid electric wire 3 at the outlet of the latter from the brake machine 9, and the other end fixed on the tensioning machine 10 and carry out the laying of the electric wire on the rolling rollers 16, 17 with a technological tension of not more than 0.7 of the tensile strength of the electric wire 3 and a minimum bending radius on the roller x 16, 17. The diameter of the rollers 16, 17 along the bottom of the bed 18 take at least 40 overall diameters of the electric wire 3. Then, under technological tension, each electric wire 3 is reassembled and fixed in the operational tension 14 and supporting clamps 15. The minimum bending radius of the electric wire is 3 per rolling rollers 16, 17 when erecting an overhead power transmission line 1 on high-rise supports 2 with at least one turn in plan at an angle β in the range of 5 ° <β <60 °, provide, using rollers with a diameter along the bottom of the bed 18 of the rolling Olika 16, 17, 60 is not less than the overall diameter of the electric wire 3. This elastically deformable layer of the bed of rollers 16, 17 operate, for example, rubber or polyurethane. And in the presence of one or more angular supports of line 1 with a rotation angle of more than 60 ° in the plan, rolling rollers are used in a similar design with a minimum diameter of at least 1000 mm or tandems of two or more rollers with a non-damaging electrical wire 3 bed 18 are used, with the tandem attached to support 2 through one point. To lay the electric wire 3, a low-twist rope with parallel-laid supporting strands in a protective sheath or in a cross-section tubular shirt, having a length corresponding to the construction length of the electric wire plus at least six heights to the point of suspension of the specified electric wire, is used as a leader cable 12. As a leader cable 12, a multi-strand braided metal cable of the cross lay is used, while installation of the leader cable is carried out only on the disconnected overhead line 1, and the leader cable 12 in areas near the brake 9 and / or tension 10 of the machine is equipped with a grounding conductor. The drum 11 with the leader cable 12 is placed on the tensioning machine 10 and serves the specified leader cable to the installation site in reverse mode, pulling it with a tensioning, for example hydraulic, mechanism, and under minimum tension is fed to the rolling rollers 16, 17, connecting after laying with the end of the electric wire 3 of the brake machine 9. The end of the electric wire 3 is connected to the leader cable 12 through the swivel 20, the mounting loop 21 and the mounting stocking 22 in the form of a cross braid 23 made of soft wire and a strip of protective tape that prevents damage l at the end portion of the electric wire 3. The pulling of the electric wire 3 begins with a minimum speed of 5 m / min, and after passing the first support 2 of the power transmission line 1, they increase the pulling speed to 100 m / min, and at the beginning of the process, the brake machine 9 is activated, which begins to release the electric wire 3, increasing the sag, then turn on the tension machine 10 and produce a broach. Installation work on the laying of electric wire 3 is performed using a tension machine 10, which is equipped with a winch with a variable pull speed, a reverse device, a device for smooth change of traction, a limiter of a given maximum tension and a capstan, while the capstan has a diameter less than the diameter of the drum of the brake machine 9 and is designed for winding only the leader cable 12. The brake machine 9 can be equipped with a device for smooth regulation of the braking force, which provides tension control Ia and sag electric wire 3. Said machine 9 equipped with dual brake drum with a diameter greater than the minimum allowable condition for nondestructive bending the electric wire 3 having composite core. The operation of the brake 9 and the tension 10 of the machines is automatically coordinated with ensuring the required tension in the entire allowable range of speeds for pulling the electric wire 3. Relocation of the electric wire 3 from the rollers 16, 17 to the operational tension 14 and / or supporting 15 clamps is carried out by means of a mounting beam 24 with a winch 25. After installation in operational clamps 14, 15, the electric wire 3 is equipped with a vibration damper. An overhead power transmission line 1 can be erected with a voltage of high and ultrahigh VVL 110-220; 220-330; 330-750 kV. In addition, an overhead power line can be built with an ultra-high voltage class above 750 kV. At the same time, when erecting overhead power transmission lines with a voltage of 0.4 to 750 kV and higher, multicore high-temperature composite electrical wires 3 can use electric wires of the type manufactured by LUMPI - BERNDORF.

A high-voltage overhead power transmission line of a high-voltage class VVL (110 ÷ 220) kV was erected as described above.

An example implementation of the invention

They build an overhead power line 1 with a voltage of 110 kV and a length of 40 km. The line is divided into construction sections of 5-6 km in length. Foundations are made and high-rise supports 2 are mounted with traverses 13 designed for laying multicore high-temperature electric wires of the TAL / HACIN 120/34 type. Prepare the head 4 and end 5 mounting sites, respectively, before the first and last height support 2 of the construction site. A rolling unit 6 and a brake machine 9 are mounted and fixed on the head platform 4 with axles oriented normally to the vertical plane of the alignment of the towers 2. On the final platform 5, a tensioning machine 10 is likewise located, which, like the brake 9, is mounted on the head platform 4 on the distance from the nearest high-rise support 2, providing an angle of inclination α of the mounted electric wire 3 is not more than α≤30 °. Mount on the traverses 13 end supports 2 tension 14, and on the traverses 13 of the intermediate supports 2 supporting clamps 15 and suspend mounting rolling rollers 16, 17 with a bed 18 adapted for rolling, a non-damaging protective sheath and the design of high-temperature electric wire 3.

A drum 6 with a multi-core composite high-temperature electric wire 3 with an individual length of not less than the full anchor construction length of the construction and mounting section is hung on the rolling unit 8, placing it on the hinge axis 7 for the upper rolling of the specified electric wire 3. A drum 11 with a leader cable is hung on the tensioning machine 10 12, preferably also with upper rolling. The leader cable 12 is pulled along the expansion rollers 16, 17 to the first high-rise support 2 and the brake machine 9, connected to the end of the multi-core composite high-temperature electric wire 3 being mounted, it is pulled along the said expansion rollers 16, 17 under technological tension and transferred to tension 14 and supporting 15 clamps with a suspension to garlands of insulators.

The high-voltage power line developed in the invention and the method of its construction provide the possibility of a sequential transition from lines and electric networks with wires of an obsolete design with low efficiency of energy transportation and increased resistive losses to the construction of overhead power lines with more efficient high-temperature composite multicore electric wires with reduced material consumption and improved efficiency and other operational characteristics that ensure It is developed by the invention with a set of installation equipment and technological methods that maximize the installation and operational integrity of electrical wires and maintain their high electrical conductivity for a long time.

Claims (2)

1. The method of construction of a high-voltage overhead transmission line of ultra-high voltage BBL 110 ÷ 220 kV, characterized in that the said line is erected on high-rise supports with the placement of a current-carrying part, comprising at least one phase high-temperature electrical wire containing at least one composite core residential, and multi-core external cord, and work on the construction of the line is carried out on the construction site with a length equal to the length of the specified line or part thereof, for this at a line erected line, assembling of the bases, tall towers, equipped before the first and after the last support respectively the head and the end construction and mounting pads, each of which operate in an alignment erected transmission line at least one anchor; on the main construction site, a mobile platform is rigidly removably fixed on the anchor with a rolling unit mounted on it with fixation in technological sequence, having a brake and an axis, on which a drum with a phase electric wire of individual length not less than the full anchor construction length of the specified VVL is horizontally mounted its installation site; in addition, a brake machine with a brake drum is mounted on said platform; moreover, the drum is equipped with an electric wire with a length of not less than the full anchor construction length of the above-mentioned construction site; the axis of the said unit is mounted on the platform normally to the vertical plane of the span of the erected line, and the drum is hung on the axis of the expansion unit with the possibility of upper rolling and with the vanishing point of the electric wire from the drum above the hinge axis; and also install a brake machine with the possibility of perceiving the load from the tension of the electric wire, on another of the mentioned sites similarly mount a tension machine with the possibility of hanging a drum with a leader cable on it; both braking and tensioning machines are located on these sites with the possibility of supplying the electric wire to the first and leaving the last support at an angle to the horizon α≤30 °, similarly, the leader cable is taken with the total or total length of at least the aforementioned individual length of the electric wire; high-rise supports are mounted with traverses designed in compliance with the conditions for minimizing the interaction of operational electromagnetic fields of electrical wires, at least to an acceptable level; install electrical insulators on the traverses and hang tension and / or supporting clamps for electrical wires to them, observing the condition of their greatest mutual distance in the traverse field of the support; set the end and intermediate rolling rollers, which for this purpose are made with a profiled bed equipped with an additional outer contact layer of elastically deformable material, the outer surface part of which is made with reduced abrasion and hardness lower than the hardness of the outer layer of the wires of the external coil of the electric wire by an amount sufficient to ensure installation -technological and operational damage from contact with the specified bed, and the rest of the deep part of the thickness of which made with a lower density and increased elasticity, including growing to the profiled bed, and, in addition, the inner surface of the specified additional outer contact layer is endowed with increased adhesion to the main material of the bed of the technological rolling roller of the tension and supporting clamps of the electric wire, as well as the shear strength of the adhesive the contact of the layers is not lower than the shear resistance of the material of the additional layer in the zone of abutment to the surface of the profiled bed, the working profile of which about adopted depth, width and / or reduced radius, not less than one and a half times greater than the overall radius of the cross section of the laid electric wire; they are passed through the expansion rollers in the direction to the leader-leader site of the cable, connect it at one end to the electric wire being laid at the outlet of the brake machine, and fasten the other end to the tension machine and lay the electric wire along the expansion rollers with a technological tension of not more than 0 , 65 on the tensile strength of the electric wire and the minimum bending radius on the rollers, the radius of which take at least 40 overall diameters of the electric wire; after which, under technological tension, the mounted electric wire is reassigned and fixed in the operational tension and / or supporting clamps, while at the time of construction of an overhead power transmission line, the minimum bending radius of the electric wire on the rolling rollers on high-rise supports is at least one turn in plan at an angle α in the range 50 <α≤60 ° provide, using rollers with a diameter along the bottom of the bed of the rolling roller, not less than 60 overall radii of the electric wire, and as an elastically deformable layer of beds and the rollers are rubberized with variable porosity, increasing with the depth of the layer, and the external contact surface is hardened with epoxy resin with a hardener, and if there are one or more angular supports in the line with a rotation angle of more than 60 °, rollers in the same design with a minimum diameter of at least 1000 mm or use tandems of two or more rollers with a non-damaging electrical bed with the possibility of mounting the tandem to the support, preferably through one point, and for laying the overhead line electrical cable as The leader cable uses a twisted rope with parallel-laid supporting strands in a protective sheath or in a tubular cross-stitch jacket having a length corresponding to the construction length of the electric wire plus at least six heights to the point of suspension of the indicated electric wire, and a multi-strand braided metal is used as the leader cable a cross-lay cable, while the installation of the leader cable is carried out only on disconnected overhead lines, and the leader cable in areas near the brake and / or tension machine they are mounted with a roller earthing switch, a drum with a leader cable is placed on a tensioning machine and the specified cable is fed to the installation site in reverse mode, pulling it with a hydraulic tensioning mechanism, and being threaded on to the rolling rollers under minimum tension, connecting after laying with the end of the electric wire at the brake machine, and the pulling of the electric wire begins at a minimum speed of 5 m / min, and after passing the first support of the power line, they increase the pulling speed to 100 m / min, and at the beginning of the process they turn on the brakes a new machine that starts to release the wire, increasing the sag, then turn on the tensioning machine and pulling, while installation work on laying the electric wire is performed using a tensioning machine, which is equipped with a winch with a smoothly varying speed of pulling, a reverse device, a device for changing traction , the limiter of the specified maximum tension and capstan, while the capstan has a diameter less than the diameter of the drum of the brake machine and is intended for winding only the leader tro and a brake machine equipped with a device modulating braking effort than provide a tension regulation and sag electric wire, and in addition, said machine is equipped with a dual brake drum with a diameter greater than the minimum allowable condition for nondestructive bending the electric wire comprising composite wires; at the same time, the operation of the brake and tensioning machines is automatically coordinated with the provision of the required tension in the entire permissible range of speeds for pulling the electric wire.
2. High-voltage overhead power transmission line of a high class of voltage VVL (110 ÷ 220) kV, characterized in that it was built by the method according to p. 1.
RU2015124765/05A 2015-06-24 2015-06-24 Method of erecting high-voltage overhead transmission line and high-voltage overhead power transmission line, built using said method RU2594197C1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4679672A (en) * 1985-01-30 1987-07-14 Bicc Public Limited Company Overhead electric traction system for railways
RU2360345C1 (en) * 2008-02-07 2009-06-27 ООО "Оптиктелеком Строй" Method of routing self-bearing optical cable on high-voltage electric power transmission towers at passages through obstacles
RU2461938C1 (en) * 2011-09-30 2012-09-20 Валерий Николаевич Карнаушенко Overhead power transmission line and method of reconstruction of overhead power transmission line
RU2461935C1 (en) * 2011-09-01 2012-09-20 Валерий Николаевич Карнаушенко High-voltage overhead power transmission line and method of erection of high-voltage overhead power transmission line

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4679672A (en) * 1985-01-30 1987-07-14 Bicc Public Limited Company Overhead electric traction system for railways
RU2360345C1 (en) * 2008-02-07 2009-06-27 ООО "Оптиктелеком Строй" Method of routing self-bearing optical cable on high-voltage electric power transmission towers at passages through obstacles
RU2461935C1 (en) * 2011-09-01 2012-09-20 Валерий Николаевич Карнаушенко High-voltage overhead power transmission line and method of erection of high-voltage overhead power transmission line
RU2461938C1 (en) * 2011-09-30 2012-09-20 Валерий Николаевич Карнаушенко Overhead power transmission line and method of reconstruction of overhead power transmission line

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