A kind of method for improving transmission line of electricity the air gap coverage
Technical field
The invention belongs to power transmission line electrical fault prevention and control field, more particularly to a kind of transmission line of electricity the air gap of improving have
The method of effect distance.
Background technology
Transmission line of electricity is the element of electrical network, with circuit distance, coverage big the features such as, often face each
The impact of complicated geographical environment and climatic environment is planted, when adverse environment causes circuit operation failure, circuit will be directly affected
Safe and reliable operation, even can cause large area blackout when serious.Extraneous various unfavorable conditions are likely to result in power transmission line
Air gap distance on road between the alternate or wire of wire and ground thing reduces, when the electrical strength of this gap distance is not resistant to
During by system highest operating voltage, disruptive discharge will occur, prevent the power grid accident for causing because of line fault to be particularly large area
Power outage, is still the most important thing of circuit maintenance work.The electric discharge master that transmission line of electricity air gap distance is not enough and causes
There are 3 kinds of forms:Wire is in electric discharge, wire between the electric discharge of shaft tower component, wire to periphery object discharge.Transmission line of electricity sheath is to carry
One of high transmission line of electricity gap coverage means, have lightweight, no aggravation mild wind to transmission line of electricity parcel insulating sheath and shake
The dynamic and advantage such as conductor cord disconnection, strand broking, current applied research is still few.Coatings RTV is with its distinctive hydrophobicity, hydrophobic
Animal migration, excellent resistance to Flashover Characteristics and long-acting, weather-proof the advantages of become the first-selection of power system power transmission and transforming equipment antifouling work
Coating, its raising effect is significant to flashover voltage, the country there is no people using RTV (room temperature vulcanized silicone rubber) insulant as defeated
Electric wire lead insulation coating is wrapped up for improving transmission line of electricity the air gap coverage with reference to insulating sheath.
Content of the invention
In view of this, in order to overcome the deficiencies in the prior art, the invention provides a kind of improve transmission line of electricity the air gap
The method of coverage, improves the air gap coverage, effectively administers between power transmission line route, between wire and atural object, distance is not
Foot and then situation about puncturing.
In order to achieve the above object, technical scheme is as follows:
A kind of method for improving transmission line of electricity the air gap coverage, comprises the following steps:
1) coating of coatings, in the groove between steel core and aluminum stranded conductor surface stock, coats at least three times PTV insulation materials
Material, per the minor tick regular hour, finally coats to certain thickness and makes conductive line surfaces in certain shape;
2) solidify, the wire that coating is completed is hung 20 hours~30 hours at normal temperatures, makes leading for coating coatings
Line is fully cured;
3) insulating sheath is wrapped up, and the two ends of insulating sheath possess projection and groove respectively, are applied in raised and groove respectively
RTV insulant is covered, raised and groove is closed up, at the gap for closing up, irrigate RTV insulant.
Further, step 1) in, the interval time be more than 20 minutes~50 minutes.
Further, step 2) in, the external diameter of the wire after solidification should be not less than the external diameter of the wire before solidification
1/5.
Further, the sheath is buckle-type.
Further, raised mutually the pressing with the groove can be closed up in hollow cylindrical.
Further, step 3) in, the insulating sheath is silicone rubber.
Further, the thickness of the insulating sheath be not less than 2~5 millimeters.
Beneficial effects of the present invention are:Under same air clearance distance, the method can effectively improve gap insulation level, subtract
Little breakdown probability, ensures circuit safe and stable operation.
(1) under the premise of substantially conductor load is not increased, can effective lifting lead wire transmission line insulator characteristic, identical gap
Under distance, wire improves at least 15% to atural object the air gap coverage, and between wire, the air gap coverage improves lifting
More than 30%, improve the normal running clearance coverage of transmission line of electricity and ensure circuit safe and stable operation;
(2) clearance distance deficiency under extraneous various unfavorable conditions effectively can be administered, and wire is between the electric discharge of shaft tower component, wire
Electric discharge, wire to periphery object discharge situation, online between will not hit when air gap distance significantly reduces between line and atural object
Wear and even result in tripping operation stoppage in transit;
(3) coatings being coated to transmission line of electricity and wraps up insulating sheath can be applicable on built transmission line of electricity, between pair
Stand-off distance carries out improvement from wretched insufficiency circuit and remedies, and also can be applicable on newly-built circuit, ensures defeated when alleviating transmission of electricity corridor anxiety
The big problem of electric line safe distance difficulty.
Description of the drawings
Fig. 1 is a kind of transmission line of electricity coating PTV insulant of method for improving transmission line of electricity the air gap coverage
Structural representation;
Fig. 2 is a kind of knot of the transmission line of electricity parcel insulating sheath of method for improving transmission line of electricity the air gap coverage
Structure schematic diagram;
1st, steel core;2nd, aluminum stranded conductor;3rd, PTV insulant;4th, buckle;5th, insulating sheath.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with the accompanying drawings and embodiment, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, not
For limiting the present invention.
A kind of method for improving transmission line of electricity the air gap coverage is to administering transmission line wire to shaft tower structure
During part electric discharge, should use in electric transmission line isolator high-pressure side side of wire;When puncturing between improvement line, should use in transmission line of electricity shelves
Away from each maximum arc sag;During for administering wire to periphery object discharge, should use in wire easily near periphery object
Place.
Embodiment 1
As shown in figure 1, a kind of method for improving transmission line of electricity the air gap coverage, comprises the following steps:
1) coating of coatings, in the groove between steel core 1 and 2 surface stock of aluminum stranded conductor, at least three times PTV insulation of coating
Material 3, per the minor tick time of 30 minutes, finally coats to certain thickness and makes conductive line surfaces in certain shape;This is certain
Shape can be approximately cylindric.
2) solidify, the wire that coating is completed is hung 20 hours~30 hours at normal temperatures, makes leading for coating coatings
Line is fully cured;The external diameter of the wire after solidification should be not less than the external diameter 1/5 of the wire before solidification.
3) insulating sheath is wrapped up, the two ends of insulating sheath 5 possess projection and groove respectively.Applied in raised and groove respectively
RTV insulant is covered, raised and groove is closed up, as shown in Fig. 2 buckle 4 is formed, the buckle 4 for closing up still suffers from certain gap,
RTV insulant need to be irrigated at the gap for closing up, at 4 bonding of buckle and gap, supplementary irrigation RTV insulant 3 ensures insulating sheath
5 close up rear seamless no electric weak spot, and wherein, sheath is buckle-type.
Projection is mutually pressed with groove can close up in hollow cylindrical.Insulating sheath is silicone rubber.Additionally, insulating sheath
Thickness be not less than 3 millimeters.
It is proved to administer effect through test by a kind of measure of the raising transmission line of electricity the air gap coverage for constituting above
Fruit is good, and under identical clearance distance, line improves at least 15% to atural object the air gap coverage, between line the air gap effectively away from
More than 30% is lifted from improving, enforcement is simple, add effect with stable, reliable no bad pair.
Embodiment 2
A kind of method for improving transmission line of electricity the air gap coverage, comprises the following steps:
1) coating of coatings, in the groove between steel core 1 and 2 surface stock of aluminum stranded conductor, coats n times PTV insulant
3, per the minor tick time of 50 minutes, finally coat to certain thickness and conductive line surfaces are made in certain shape;This certain shape
Can be approximately cylindric.
2) solidify, the wire that coating is completed is hung 20 hours~30 hours at normal temperatures, makes leading for coating coatings
Line is fully cured;The external diameter of the wire after solidification should be not less than the external diameter 1/5 of the wire before solidification.
3) insulating sheath is wrapped up, the two ends of insulating sheath 5 possess projection and groove respectively.Applied in raised and groove respectively
RTV insulant is covered, raised and groove is closed up, buckle 4 is formed, the buckle 4 for closing up still suffers from certain gap, need to close up
Irrigate at gap supplementary irrigation RTV insulant 3 at RTV insulant, 4 bonding of buckle and gap ensure insulating sheath 5 close up after no
Gap no electric weak spot.Wherein, sheath is buckle-type.
Projection is mutually pressed with groove can close up in hollow cylindrical.Insulating sheath is silicone rubber, additionally, insulating sheath
Thickness be not less than 4 millimeters.
It is proved to administer effect through test by a kind of measure of the raising transmission line of electricity the air gap coverage for constituting above
Fruit is good, and under identical clearance distance, line improves at least 15% to atural object the air gap coverage, between line the air gap effectively away from
More than 30% is lifted from improving, enforcement is simple, add effect with stable, reliable no bad pair.
Embodiment described above only have expressed embodiments of the present invention, and its description is more concrete and detailed, but can not
Therefore the restriction being interpreted as 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, some deformation can also be made and is improved, these belong to the protection model of the present invention
Enclose.Therefore, the protection domain of patent of the present invention should be defined by claims.