CN112217143A - Operation method for replacing composite insulator in high-altitude area in 500kV line in live mode - Google Patents
Operation method for replacing composite insulator in high-altitude area in 500kV line in live mode Download PDFInfo
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- CN112217143A CN112217143A CN202011266397.0A CN202011266397A CN112217143A CN 112217143 A CN112217143 A CN 112217143A CN 202011266397 A CN202011266397 A CN 202011266397A CN 112217143 A CN112217143 A CN 112217143A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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Abstract
The invention relates to the technical field of live-line work maintenance equipment, in particular to a method for live-line replacement of a composite insulator on a 500kV line in a high-altitude area, which comprises the following steps: step 1: calculating safety distance in a classified manner; step 2: carrying out feasibility analysis; and step 3: selecting an operation method and an operation step. In the operation method for replacing the composite insulator on the 500kV line in the high-altitude area in an electrified manner, the composite insulator on the 500kV line in the high-altitude area is replaced in an electrified manner, so that the operation method and the conditions for replacing the composite insulator on the 500kV line in the high-altitude area in an electrified manner are determined, the blank of replacing the composite insulator on the 500kV line in the high-altitude area of a power grid in the south is filled, the safety and the reliability of the hot-line operation on the 500kV line are further improved, and the method plays an active role in further promoting the hot-line operation on a power transmission line in the high-altitude area.
Description
Technical Field
The invention relates to the technical field of live-line work maintenance equipment, in particular to a method for replacing a composite insulator in a 500kV line live-line manner in a high-altitude area.
Background
In the aspect of live-line operation, domestic electric power supply enterprises or related units do not analyze and report the operation method for replacing the composite insulator in a 500kV line live-line mode in a high-altitude area, how to replace the composite insulator in the 500kV line live-line mode in the high-altitude area is carried out, the operation project still belongs to a blank in a south network system, and the research on the operation method and conditions for replacing the composite insulator in the 500kV line live-line mode in the high-altitude area can fill the blank of the work in the south network system and can also improve the customer satisfaction and the power supply reliability, so that the research on the project is necessary and important.
Disclosure of Invention
The invention aims to provide an operation method for replacing a composite insulator in a high-altitude area in a 500kV line in a live manner, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides an operation method for replacing a composite insulator in a high-altitude area in a 500kV line in a live way, which comprises the following steps:
step 1: calculating safety distances in a classified mode, namely aiming at the length of a hardware string, the length of an insulator string, the vertical distance between a three-phase lead and an upper cross arm, the vertical distance between the three-phase lead and a lower platform wire cross arm, the horizontal distance between the three-phase lead and a tower body is minimum, the altitude of an operation position is high, the safety distances are not corrected, the requirement of the minimum safety distance and the combined gap distance are used as radiuses, and the safety distances are verified by taking the operation position as the circle center;
step 2: the feasibility analysis is carried out, stress analysis and live working gap analysis are carried out according to parameter data provided by the work to determine the feasibility of the work, and a feasibility scheme of the work is determined according to field condition analysis;
and step 3: selecting an operation method and an operation step.
Preferably, the operation method selection comprises the steps of selecting modes of entering and exiting the electric field by equipotential personnel according to the tower structure and the safety distance, and analyzing the safety distance of the operation mode.
Preferably, the operation steps are as follows:
step 11: under the condition that a line conductor runs in a live-line mode, a ground potential operator is located at a cross arm position, and an insulating trolley group is used for sending equipotential personnel to an electric field quadripartion conductor through a hanging basket;
step 12: equipotential personnel install the four-bundle conductor wire lifting hook in the electric field;
step 13: a ground potential worker installs a screw rod and a cross arm side clamp on a tower;
step 14: in the process of tightening the screw rod by a ground potential person, the equipotential person checks the stress condition of the complete set of tools, continues tightening the screw rod after the stress is normal, transfers the load of the whole set of wires until the four strings of insulators are completely loosened, adopts the combination double tightening of a four-wire lifting hook, the screw rod, a pulling plate, a connecting head and the like in the vertical direction, hooks the wire side on the four wires, the four-wire lifting hook is connected with the screw rod, the pulling plate, the connecting head and the like along the connecting screw rod, the connecting head is connected with the construction hole on the cross arm side for stress, tightens the screw rod on the wire side, transfers the load of the whole set of wires, loosens;
step 15: and (4) the equipotential electrician checks the loosening condition of the insulator string, and after the insulator string is confirmed to be completely loosened, the insulator string is gradually loosened to realize the live replacement of the 500kV line composite insulator.
Preferably, the stress analysis comprises the following steps:
step 21: according to the vertical span of the tower, the load of a conducting wire borne by the tower is calculated, the arrangement of a hardware tool and 4 operators is 300kg, the stress of a single-string insulator is calculated by considering the form of the hardware tool as double-string V-shaped connection, the tension coefficient and the unbalance coefficient are considered in operation, and the tonnage of a tool is selected;
step 22: lifting the whole group of wires by using a wire lifting hook, wherein the wire lifting hook needs to bear the gravity of the whole group of wires, and the tonnage of a tool is selected by considering the tension coefficient and the unbalance coefficient in the operation;
step 23: by adopting the integral load transfer operation method, the selection of the rated load of the tool is correct.
Compared with the prior art, the invention has the beneficial effects that:
in the operation method for replacing the composite insulator on the 500kV line in the high-altitude area in an electrified manner, the composite insulator on the 500kV line in the high-altitude area is replaced in an electrified manner, so that the operation method and the conditions for replacing the composite insulator on the 500kV line in the high-altitude area in an electrified manner are determined, the blank of replacing the composite insulator on the 500kV line in the high-altitude area of a power grid in the south is filled, the safety and the reliability of the hot-line operation on the 500kV line are further improved, and the method plays an active role in further promoting the hot-line operation on a power transmission line in the high-altitude area.
Drawings
FIG. 1 is a schematic view of the installation of the tool of the present invention.
The various reference numbers in the figures mean:
1. pulling a plate; 2. a four-split conductor lifting hook; 3. and a screw rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Example 1
The invention provides an operation method for replacing a composite insulator in a 500kV line at a high altitude area in an electrified way, which comprises the following steps:
step 1: calculating safety distances in a classified mode, namely aiming at the length of a hardware string, the length of an insulator string, the vertical distance between a three-phase lead and an upper cross arm, the vertical distance between the three-phase lead and a lower platform wire cross arm, the horizontal distance between the three-phase lead and a tower body is minimum, the altitude of an operation position is high, the safety distances are not corrected, the requirement of the minimum safety distance and the combined gap distance are used as radiuses, and the safety distances are verified by taking the operation position as the circle center;
step 2: the feasibility analysis is carried out, stress analysis and live working gap analysis are carried out according to parameter data provided by the work to determine the feasibility of the work, and a feasibility scheme of the work is determined according to field condition analysis;
and step 3: selecting an operation method and an operation step.
Specifically, the operation method selection comprises the steps of selecting modes of entering and exiting the electric field of the equipotential personnel according to the tower structure and the safety distance, and analyzing the safety distance of the operation mode.
Example 2
The invention also provides an operation method for replacing the composite insulator in the high-altitude area with the 500kV line in an electrified way, which comprises the following steps:
step 1: and (4) calculating safety distance in a classified mode, wherein the horizontal distance between the three-phase lead and the tower body is the minimum according to the length of the hardware string, the length of the insulator string, the vertical distance between the three-phase lead and the upper cross arm, the vertical distance between the three-phase lead and the lower cross arm of the platform line and the horizontal distance between the three-phase lead and the tower body. The altitude of the operation position, the safety distance are not corrected, the requirement of the minimum safety distance and the combined gap distance are taken as the radius, and the safety distance is checked by taking the operation position as the center of a circle;
step 2: the feasibility analysis is carried out, stress analysis and live working gap analysis are carried out according to parameter data provided by the work to determine the feasibility of the work, and a feasibility scheme of the work is determined according to field condition analysis;
and step 3: selecting an operation method and an operation step.
Specifically, the operation method selection comprises the steps of selecting modes of entering and exiting the electric field of the equipotential personnel according to the tower structure and the safety distance, and analyzing the safety distance of the operation mode.
In this embodiment, the operation steps are as follows:
step 11: under the condition that a line lead is in live operation, a ground potential operator is located at a cross arm position, firstly, an insulating pulley group is used for sending equipotential personnel to an electric field quadripartion lead through a hanging basket, the operator climbs a tower to reach an operation position, a cross arm side electrician uses the insulating pulley group to send the equipotential personnel to the electric field through the hanging basket, a ground electrician assembles a tool and lifts the tool according to requirements, the cross arm side ground potentials 1 and 2 electricians and the equipotential 1 and 2 electricians are matched with each other to compare the assembled size, the tool size is marked at the same time, the ground electrician reassembles and lifts the tool according to the marking of the electricians on the tower, and the ground electrician lifts the assembled tool to reach the operation position;
step 12: equipotential personnel install the four-split conductor lifting hook 2 in the electric field, and the No. 1 and No. 2 electricians on the cross arm side cooperate with the equipotential 1 and No. 2 electricians to complete the installation of the four-split conductor lifting hook;
step 13: a ground potential worker installs a screw rod 3 and a cross arm side clamp on a tower, simultaneously an equipotential electrician and a ground electrician cooperate with the cross arm side electrician to complete installation of the cross arm side clamp, the cross arm side No. 1 and No. 2 electricians tighten the screw rod 3, after tightening, the stress condition and deformation of the clamp screw rod 3 are checked, and after confirming that no fault exists, the screw rod 3 is continuously tightened until all loads are transferred to the clamp;
step 14: in the process of tightening the screw rod 3 by a ground potential person, the equipotential person checks the stress condition of the complete set of tools, continues to tighten the screw rod 3 after the stress is normal, transfers the load of the whole set of wires until four strings of insulators are completely loosened, adopts the combination of a four-wire lifting hook, the screw rod 3, a pulling plate 1, a connecting head and the like to double tighten in the vertical direction, hooks the wire side on four wires, the four-wire lifting hook is connected with the screw rod 3, the pulling plate 1, the connecting head and the like along the connecting screw rod 1, the connecting head and a cross arm side construction hole to be stressed, tightens the screw rod 3 on the wire side, transfers the load of the whole set of wires, completely loosens the composite insulators, and performs replacement one by one, and after the composite insulators are completely loosened, the equipotential 1 and electrician No. 2;
step 15: and (4) the equipotential electrician checks the loosening condition of the insulator string, and after the insulator string is confirmed to be completely loosened, the insulator string is gradually loosened to realize the live replacement of the 500kV line composite insulator.
Example 3
The invention also provides an operation method for replacing the composite insulator in the high-altitude area with the 500kV line in an electrified way, which comprises the following steps:
step 1: and (4) calculating safety distance in a classified mode, wherein the horizontal distance between the three-phase lead and the tower body is the minimum according to the length of the hardware string, the length of the insulator string, the vertical distance between the three-phase lead and the upper cross arm, the vertical distance between the three-phase lead and the lower cross arm of the platform line and the horizontal distance between the three-phase lead and the tower body. The altitude of the operation position, the safety distance are not corrected, the requirement of the minimum safety distance and the combined gap distance are taken as the radius, and the safety distance is checked by taking the operation position as the center of a circle;
step 2: the feasibility analysis is carried out, stress analysis and live working gap analysis are carried out according to parameter data provided by the work to determine the feasibility of the work, and a feasibility scheme of the work is determined according to field condition analysis;
and step 3: selecting an operation method and an operation step.
Specifically, the operation method selection comprises the steps of selecting modes of entering and exiting the electric field of the equipotential personnel according to the tower structure and the safety distance, and analyzing the safety distance of the operation mode.
In this embodiment, the operation steps are as follows:
step 11: under the condition that a line lead is in live operation, a ground potential operator is located at a cross arm position, firstly, an insulating pulley group is used for sending equipotential personnel to an electric field quadripartion lead through a hanging basket, the operator climbs a tower to reach an operation position, a cross arm side electrician uses the insulating pulley group to send the equipotential personnel to the electric field through the hanging basket, a ground electrician assembles a tool and lifts the tool according to requirements, the cross arm side ground potentials 1 and 2 electricians and the equipotential 1 and 2 electricians are matched with each other to compare the assembled size, the tool size is marked at the same time, the ground electrician reassembles and lifts the tool according to the marking of the electricians on the tower, and the ground electrician lifts the assembled tool to reach the operation position;
step 12: equipotential personnel install the four-split conductor lifting hook 2 in the electric field, and the No. 1 and No. 2 electricians on the cross arm side cooperate with the equipotential 1 and No. 2 electricians to complete the installation of the four-split conductor lifting hook;
step 13: a ground potential worker installs a screw rod 3 and a cross arm side clamp on a tower, simultaneously an equipotential electrician and a ground electrician cooperate with the cross arm side electrician to complete installation of the cross arm side clamp, the cross arm side No. 1 and No. 2 electricians tighten the screw rod 3, after tightening, the stress condition and deformation of the clamp screw rod 3 are checked, and after confirming that no fault exists, the screw rod 3 is continuously tightened until all loads are transferred to the clamp;
step 14: in the process of tightening the screw rod 3 by a ground potential person, the equipotential person checks the stress condition of the complete set of tools, continues to tighten the screw rod 3 after the stress is normal, transfers the load of the whole set of wires until four strings of insulators are completely loosened, adopts the combination of a four-wire lifting hook, the screw rod 3, a pulling plate 1, a connecting head and the like to double tighten in the vertical direction, hooks the wire side on four wires, the four-wire lifting hook is connected with the screw rod 3, the pulling plate 1, the connecting head and the like along the connecting screw rod 1, the connecting head and a cross arm side construction hole to be stressed, tightens the screw rod 3 on the wire side, transfers the load of the whole set of wires, completely loosens the composite insulators, and performs replacement one by one, and after the composite insulators are completely loosened, the equipotential 1 and electrician No. 2;
step 15: the equipotential electrician checks the loosening condition of the insulator string, and after confirming that the insulator string is completely loosened, the insulator string is gradually loosened to realize the live replacement of the 500kV line composite insulator
Further, the stress analysis comprises the following steps:
step 21: according to the vertical span of the tower, the load of a conducting wire borne by the tower is calculated, the arrangement of a hardware tool and 4 operators is 300kg, the stress of a single-string insulator is calculated by considering the form of the hardware tool as double-string V-shaped connection, the tension coefficient and the unbalance coefficient are considered in operation, and the tonnage of a tool is selected;
step 22: lifting the whole group of wires by using a wire lifting hook, wherein the wire lifting hook needs to bear the gravity of the whole group of wires, and the tonnage of a tool is selected by considering the tension coefficient and the unbalance coefficient in the operation;
step 23: by adopting the integral load transfer operation method, the selection of the rated load of the tool is correct.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The operation method for replacing the composite insulator in the high-altitude area with the 500kV line in the live mode is characterized by comprising the following steps of: the operation method for replacing the composite insulator in the live state of the 500kV line in the high-altitude area comprises the following steps:
step 1: calculating safety distances in a classified mode, namely aiming at the length of a hardware string, the length of an insulator string, the vertical distance between a three-phase lead and an upper cross arm, the vertical distance between the three-phase lead and a lower platform wire cross arm, the horizontal distance between the three-phase lead and a tower body is minimum, the altitude of an operation position is high, the safety distances are not corrected, the requirement of the minimum safety distance and the combined gap distance are used as radiuses, and the safety distances are verified by taking the operation position as the circle center;
step 2: the feasibility analysis is carried out, stress analysis and live working gap analysis are carried out according to parameter data provided by the work to determine the feasibility of the work, and a feasibility scheme of the work is determined according to field condition analysis;
and step 3: selecting an operation method and an operation step.
2. The operation method for replacing the composite insulator in the high-altitude area with the 500kV line in the electrified manner according to claim 1, characterized in that: the operation method selection comprises the steps of selecting modes of entering and exiting the electric field of equipotential personnel according to the tower structure and the safety distance, and analyzing the safety distance of the operation mode.
3. The operation method for replacing the composite insulator in the high-altitude area with the 500kV line in the electrified manner according to claim 1, characterized in that: the operation steps are as follows:
step 11: under the condition that a line conductor runs in a live-line mode, a ground potential operator is located at a cross arm position, and an insulating trolley group is used for sending equipotential personnel to an electric field quadripartion conductor through a hanging basket;
step 12: equipotential personnel install the four-bundle conductor wire lifting hook in the electric field;
step 13: a ground potential worker installs a screw rod and a cross arm side clamp on a tower;
step 14: in the process of tightening the screw rod by a ground potential person, the equipotential person checks the stress condition of the complete set of tools, continues tightening the screw rod after the stress is normal, transfers the load of the whole set of wires until the four strings of insulators are completely loosened, adopts the combination double tightening of a four-wire lifting hook, the screw rod, a pulling plate, a connecting head and the like in the vertical direction, hooks the wire side on the four wires, the four-wire lifting hook is connected with the screw rod, the pulling plate, the connecting head and the like along the connecting screw rod, the connecting head is connected with the construction hole on the cross arm side for stress, tightens the screw rod on the wire side, transfers the load of the whole set of wires, loosens;
step 15: and (4) the equipotential electrician checks the loosening condition of the insulator string, and after the insulator string is confirmed to be completely loosened, the insulator string is gradually loosened to realize the live replacement of the 500kV line composite insulator.
4. The operation method for replacing the composite insulator in the high-altitude area with the 500kV line in the electrified manner according to claim 1, characterized in that: the stress analysis comprises the following steps:
step 21: according to the vertical span of the tower, the load of a conducting wire borne by the tower is calculated, the arrangement of a hardware tool and 4 operators is 300kg, the stress of a single-string insulator is calculated by considering the form of the hardware tool as double-string V-shaped connection, the tension coefficient and the unbalance coefficient are considered in operation, and the tonnage of a tool is selected;
step 22: lifting the whole group of wires by using a wire lifting hook, wherein the wire lifting hook needs to bear the gravity of the whole group of wires, and the tonnage of a tool is selected by considering the tension coefficient and the unbalance coefficient in the operation;
step 23: by adopting the integral load transfer operation method, the selection of the rated load of the tool is correct.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011266397.0A CN112217143A (en) | 2020-11-13 | 2020-11-13 | Operation method for replacing composite insulator in high-altitude area in 500kV line in live mode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011266397.0A CN112217143A (en) | 2020-11-13 | 2020-11-13 | Operation method for replacing composite insulator in high-altitude area in 500kV line in live mode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112803314A (en) * | 2021-02-07 | 2021-05-14 | 国网江苏省电力有限公司无锡供电分公司 | Live-line defect eliminating method and device for post insulator of cable terminal |
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2020
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| CN101252263A (en) * | 2008-04-02 | 2008-08-27 | 云南电网公司大理供电局 | Method for electrified replacing 500 kV line L string insulator |
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| CN112803314A (en) * | 2021-02-07 | 2021-05-14 | 国网江苏省电力有限公司无锡供电分公司 | Live-line defect eliminating method and device for post insulator of cable terminal |
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