CN113090096B - Double-circuit power transmission line disconnection tower, disconnection system and method - Google Patents
Double-circuit power transmission line disconnection tower, disconnection system and method Download PDFInfo
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- CN113090096B CN113090096B CN202110296933.XA CN202110296933A CN113090096B CN 113090096 B CN113090096 B CN 113090096B CN 202110296933 A CN202110296933 A CN 202110296933A CN 113090096 B CN113090096 B CN 113090096B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/24—Cross arms
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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
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/05—Suspension arrangements or devices for electric cables or lines
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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
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/20—Spatial arrangements or dispositions of lines or cables on poles, posts or towers
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Abstract
The invention belongs to the technical field of transmission towers, and particularly relates to a double-circuit transmission line on-off tower which comprises a main frame, a ground wire cross arm, a plurality of wire cross arms and a connecting support, wherein the ground wire cross arm and the plurality of wire cross arms are respectively arranged on the main frame, the ground wire cross arm is arranged at the top of the main frame, the plurality of wire cross arms are arranged at intervals along the height direction of the main frame, a first ground wire hanging point and a second ground wire hanging point are arranged on the ground wire cross arm, a first wire hanging point and a second wire hanging point are arranged on the wire cross arm, the connecting support comprises a first connecting support and a second connecting support, the first connecting support is connected with the wire cross arm at the first wire hanging point on each wire cross arm, and the second connecting support is connected with the wire cross arm at the second wire hanging point on each wire cross arm. The double-circuit power transmission line breaking tower can support the long jumper wires connected with the leads on two sides of the non-same tower, and improves the power transmission safety.
Description
Technical Field
The invention relates to the technical field of transmission towers, in particular to a double-circuit transmission line on-off tower, a double-circuit transmission line on-off system and a double-circuit transmission line on-off method.
Background
With the rapid development of economy in various parts of China, the density of power transmission lines is continuously increased, the planning and layout of a power grid are more and more complex, the connection mode that a double-circuit power transmission line is only required to be disconnected on one side is more and more common, the investment and the operation of power transmission line engineering are directly influenced by the selection of a disconnection scheme, and the power transmission line is decisive for the reliability of the line, the safety of the operation and the economic rationality particularly under the condition that the construction needs to be carried out under the existing line and the length of the power failure time required when the disconnection scheme is implemented.
In the related art, a one-base special-shaped tower or a two-base double-loop strain tower needs to be newly built on line, so that power failure of the existing line is needed in the tower assembling stage and even in the foundation construction stage, the power failure time is long, the investment is high, the requirements on the length and the arrangement of the cross arm of the tower under the line are high, and the inventor of the application finds that in the related art, when the span of the jumper is large, the jumper cannot be supported, and potential safety hazards exist.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides a double-circuit power transmission line on-off tower which can support long jumper wires connected with leads on two sides of a non-identical tower, and improves the safety of power transmission.
The embodiment of the invention also provides a double-circuit power transmission line breaking system.
The embodiment of the invention also provides a double-circuit power transmission line breaking method.
The double-circuit power transmission line disconnection tower according to the embodiment of the invention comprises: a main frame; the ground wire cross arm and the lead cross arms are respectively arranged on the main frame, the ground wire cross arm is arranged at the top of the main frame, the lead cross arms are arranged at intervals along the height direction of the main frame, a first ground wire hanging point and a second ground wire hanging point are arranged on the ground wire cross arm, and a first lead hanging point and a second lead hanging point are arranged on the lead cross arm; the connecting support comprises a first connecting support and a second connecting support, the first connecting support is connected with each wire cross arm at a first wire hanging point on each wire cross arm, and the second connecting support is connected with each wire cross arm at a second wire hanging point on each wire cross arm.
According to the double-circuit power transmission line disconnection tower disclosed by the embodiment of the invention, the long jumper wires connected with the leads on two sides of a non-identical tower can be supported, so that the power transmission safety is improved.
In some embodiments, a plurality of the wire cross arms are spaced in a height direction of the main frame, and the plurality of the wire cross arms are arranged in parallel with each other.
In some embodiments, the wire cross arm and the first connecting bracket and the second connecting bracket connected with the wire cross arm are all arranged at an included angle of 60-150 degrees.
In some embodiments, a plurality of first connecting brackets connected to a plurality of the wire crossarms are parallel to each other, and a plurality of second connecting brackets connected to a plurality of the wire crossarms are parallel to each other.
In some embodiments, the first wire hanging point is provided at a first end of the wire cross-arm, and the second wire hanging point is provided at a second end of the wire cross-arm.
The double-circuit power transmission line disconnection system comprises the double-circuit power transmission line disconnection tower in any one of the embodiments.
According to the double-circuit power transmission line breaking system disclosed by the embodiment of the invention, the number and the occupied area of newly-built towers can be reduced, the power failure time is shortened, the construction difficulty and the construction cost are reduced, and the engineering investment is saved.
In some embodiments, the double-circuit power transmission line disconnection system further includes a first power transmission line and a second power transmission line, the disconnection tower and the second power transmission line are both located on a disconnection side of the first power transmission line, the disconnection tower is located between the first power transmission line and the second power transmission line, the first power transmission line has a disconnection side power transmission loop, the second power transmission line has a first power transmission loop and a second power transmission loop, the first power transmission loop is connected with a first wire hanging point on a wire cross arm, and the second power transmission loop is connected with a second wire hanging point on the wire cross arm.
In some embodiments, the open-side power transmission circuit, the first power transmission circuit and the second power transmission circuit are all three-phase power transmission lines.
In some embodiments, any two of the open-side power transmission circuit, the first power transmission circuit and the second power transmission circuit are mutually exclusive.
In some embodiments, the dual-circuit power transmission line breaking system further includes a plurality of first jumpers and a plurality of second jumpers, the first jumpers are disposed between the breaking-side power transmission circuit and the first power transmission circuit, and the plurality of first jumpers correspond to the wires in the first power transmission circuit in a one-to-one manner, the second jumpers are disposed between the breaking-side power transmission circuit and the second power transmission circuit, and the plurality of second jumpers correspond to the wires in the second power transmission circuit in a one-to-one manner.
According to the double-circuit power transmission line breaking method provided by the embodiment of the invention, the breaking method comprises the following steps:
newly building a cut-off tower on the cut-off side of the first power transmission line;
respectively connecting a first power transmission loop and a second power transmission loop in a second power transmission line with a cut-off tower;
disconnecting the first power transmission line, and removing a jumper wire on the disconnected side of the first power transmission line;
installing a plurality of first jumpers between the first power transmission loop and a cut-off side loop in the first power transmission line, and installing a plurality of second jumpers between the second power transmission loop and the cut-off side loop in the first power transmission line;
and closing the first transmission line and the second transmission line.
According to the double-circuit power transmission line breaking method provided by the embodiment of the invention, the number and the occupied area of newly built towers can be reduced, the construction difficulty and the construction cost are reduced, the power failure time is shortened, the engineering investment is saved, and long jumper wires connected with leads on two sides of a non-identical tower can be supported through the first connecting support and the second connecting support, so that the power transmission safety is improved.
Drawings
Fig. 1 is a schematic structural view of a double-circuit power transmission line disconnection tower according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a dual-circuit power transmission line disconnection system according to an embodiment of the present invention.
Reference numerals:
the main frame 1 is provided with a main frame,
a ground wire cross arm 2, a first ground wire hanging point 21, a second ground wire hanging point 22,
a wire cross arm 3, a first wire hanging point 31, a second wire hanging point 32,
the connecting bracket 4, the first connecting bracket 41, the second connecting bracket 42,
the insulator hardware string 5 is provided with a plurality of insulator hardware strings,
a first transmission line 6, a first open-side transmission circuit 61, a second open-side transmission circuit 62,
the second transmission line 7, the first transmission circuit 71, the second transmission circuit 72,
a first jumper wire 8 and a second jumper wire 9.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present invention and should not be construed as limiting the present invention.
A double-circuit power transmission line disconnecting tower according to an embodiment of the present invention is described below with reference to fig. 1.
The double-circuit power transmission line disconnection tower comprises a main frame 1, a ground wire cross arm 2, a plurality of wire cross arms 3 and a connecting support 4.
Ground wire cross arm 2 and a plurality of wire cross arm 3 are established respectively on body frame 1, and ground wire cross arm 2 establishes at the top of body frame 1, and a plurality of wire cross arms 3 are arranged along the direction of height interval of body frame 1, are equipped with first ground wire on the ground wire cross arm 2 and hang some 21 and second ground wire and hang some 22, are equipped with first wire on the wire cross arm 3 and hang some 31 and second wire 32.
As shown in fig. 1, a plurality of wire cross arms 3 are provided below the ground wire cross arm 2, the ground wire cross arm 2 extends in the left-right direction, the middle portion of the ground wire cross arm 2 is connected to the main frame 1, the wire cross arm 3 also extends in the left-right direction, and the wire cross arm 3 and the ground wire cross arm 2 are supported in parallel with each other. Specifically, the embodiment of the present invention includes three wire cross arms 3, and the three wire cross arms 3 are arranged at intervals in the up-down direction. It is to be understood that the number of wire cross arms 3 in the embodiment of the present application is not limited thereto.
It should be noted that the ground wire is bridged on the ground wire cross arm 2 by the first ground wire hanging point 21 and the second ground wire hanging point 22, a hardware string and the like are provided between the ground wire and the ground wire cross arm 2, the conductor is bridged on the conductor cross arm 3 by the first conductor hanging point 31 and the second conductor hanging point 32, and an insulator hardware string and the like are provided between the conductor and the conductor cross arm 3.
The connecting bracket 4 comprises a first connecting bracket 41 and a second connecting bracket 42, the first connecting bracket 41 being connected to each wire cross-arm 3 at a first wire hanging point 31 and the second connecting bracket 42 being connected to each wire cross-arm 3 at a second wire hanging point 32.
As shown in fig. 1, the first connecting bracket 41 is provided at a rear end of the wire cross arm, the first connecting bracket 41 extends in the front-rear direction, a front end of the first connecting bracket 41 is connected to the wire cross arm 3, the second connecting bracket 42 is provided at a rear end of the wire cross arm, the second connecting bracket 42 extends in the front-rear direction, and a front end of the second connecting bracket 42 is connected to the wire cross arm 3.
An insulator fitting string 5 and the like are provided between the jumper wire and the connecting bracket 4.
It should be noted that the first wire hanging point 31 is provided at the front end of the wire cross arm, the second wire hanging point 32 is provided at the front end of the wire cross arm, and the first wire hanging point 31 and the second wire hanging point 32 are oppositely arranged in the left-right direction.
Specifically, the main frame 1, the ground wire cross arm 2 and the wire cross arm 3 are all made of angle steel. The angle steel is convenient to obtain, low in material price, mature in processing technology and low in installation and transportation difficulty, so in the embodiment, the tower body is made of the angle steel, the production cost is convenient to control, and the processing difficulty is reduced. Certainly, as can be known by those skilled in the art, the main frame 1, the ground wire cross arm 2 and the wire cross arm 3 can also be made of steel pipes, so that the tower body has small wind pressure and high rigidity, the tower weight of the tower can be effectively controlled, the foundation acting force is reduced, and the tower is simple in structure, reasonable in stress and clear in force transmission.
According to the double-circuit power transmission line disconnection tower provided by the embodiment of the invention, the first connecting bracket and the second connecting bracket are arranged, so that long jumper wires connected with wires on two sides of a non-identical tower in a power transmission line can be supported, and the power transmission safety is improved.
In some embodiments, the plurality of wire cross arms 3 are spaced in the height direction of the main chassis 1 (up-down direction as shown in fig. 1), and the plurality of wire cross arms 3 are arranged in parallel with each other.
In some embodiments, the wire cross arm 3 and the first and second connecting brackets 41 and 42 connected thereto are all angled at 60 ° to 150 °.
It should be noted that the included angle between the wire cross arm 3 and the first connecting bracket 41 is 60 ° to 150 °, and the included angle between the wire cross arm 3 and the second connecting bracket 42 is 60 ° to 150 °. It will be appreciated that the angle between the wire cross arm 3 and the first connecting bracket 41 may be 60 °, 70 ° or 150 °, and the angle between the wire cross arm 3 and the second connecting bracket 42 may be 60 °, 70 ° or 150 °.
As shown in fig. 1, specifically, the angle between the wire cross arm 3 and the first connecting bracket 41 is 90 °, and the angle between the wire cross arm 3 and the second connecting bracket 42 is 90 °.
In some embodiments, the plurality of first connecting brackets 41 connected to the plurality of wire cross arms 3 are parallel to each other, and the plurality of second connecting brackets 42 connected to the plurality of wire cross arms 3 are parallel to each other.
The number of the first connecting brackets 41 is the same as the number of the wire cross arms 3, and the number of the second connecting brackets 42 is the same as the number of the first connecting brackets 41.
According to the double-circuit transmission line disconnection tower disclosed by the embodiment of the invention, the plurality of first connecting brackets 41 are parallel to each other, and the plurality of second connecting brackets 42 are parallel to each other, so that the intersection among a plurality of jumper wires can be avoided, and the transmission safety is improved.
In some embodiments, a first wire hanging point 31 is provided at a first end of wire cross arm 3 (left end of wire cross arm 3 as shown in fig. 1), and a second wire hanging point 32 is provided at a second end of wire cross arm 3 (right end of wire cross arm 3 as shown in fig. 1).
A double circuit power transmission line breaking tower according to some embodiments of the present invention is described below with reference to fig. 1.
The double-circuit power transmission line breaking tower comprises a main frame 1, a ground wire cross arm 2, a plurality of wire cross arms 3, a connecting support 4 and an insulator hardware string 5.
Ground wire cross arm 2 and three wire cross arm 3 are established respectively on body frame 1, and ground wire cross arm 2 is established at the top of body frame 1, and three wire cross arm 3 is equipped with first ground wire hanging point 21 and second ground wire hanging point 22 along upper and lower direction interval arrangement on the ground wire cross arm 2, is equipped with first wire hanging point 31 and second wire hanging point 32 on the wire cross arm 3.
The connecting bracket 4 comprises a first connecting bracket 41 and a second connecting bracket 42, the first connecting bracket 41 being connected to each wire cross-arm 3 at a first wire hanging point 31 and the second connecting bracket 42 being connected to each wire cross-arm 3 at a second wire hanging point 32.
The first connecting bracket 41 extends in the front-rear direction, the front end of the first connecting bracket 41 is connected to the wire cross arm 3, the second connecting bracket 42 extends in the front-rear direction, and the front end of the second connecting bracket 42 is connected to the wire cross arm 3.
The angle between the wire cross arm 3 and the first connecting bracket 41 is 90 °, and the angle between the wire cross arm 3 and the second connecting bracket 42 is 90 °.
The double-circuit power transmission line breaking system comprises the double-circuit power transmission line breaking tower in any one of the embodiments.
According to the double-circuit power transmission line on-off system provided by the embodiment of the invention, the double-circuit power transmission line on-off pole tower is arranged on the on-off side of the existing power transmission line, a newly-built one-foundation special-shaped tension tower or a newly-built two-foundation double-circuit tension tower is not required below the existing line, and a triangular connecting line structure is not required to be formed, so that the number and the floor area of the newly-built pole tower can be reduced, the power failure time is shortened, the construction difficulty and the construction cost are reduced, the engineering investment is saved, and the long jumper can be supported through the first connecting bracket and the second connecting bracket, so that the power transmission safety is improved.
In some embodiments, the dual-circuit power transmission line disconnection system further includes a first power transmission line 6 and a second power transmission line 7, the disconnection tower and the second power transmission line 7 are both located on a disconnection side of the first power transmission line 6, the disconnection tower is located between the first power transmission line 6 and the second power transmission line 7, the first power transmission line 6 has a disconnection side power transmission circuit, the second power transmission line 7 has a first power transmission circuit 71 and a second power transmission circuit 72, the first power transmission circuit 71 is connected with the first wire hanging point 31 on the wire cross arm 3, and the second power transmission circuit 72 is connected with the second wire hanging point 32 on the wire cross arm 3.
As shown in fig. 2, the open tower and the second transmission line 7 are both arranged on the front side of the first transmission line 6, the first transmission loop 71 and the second transmission loop 72 are respectively arranged on the left side and the right side of the open tower, the first transmission loop 71 is connected with the first wire hanging point 31, and the second transmission loop 72 is connected with the second wire hanging point 32.
In some embodiments, the open side power transmission circuit, the first power transmission circuit 71 and the second power transmission circuit 72 are all three-phase power transmission lines.
As shown in fig. 2, three phase wires in a three-phase power transmission line are respectively connected with three wire cross arms 3.
In some embodiments, any two of the open side power transmission circuit, the first power transmission circuit 71 and the second power transmission circuit 72 do not intersect with each other.
In some embodiments, the dual-circuit power transmission line breaking system further includes a plurality of first jumpers 8 and a plurality of second jumpers 9, the first jumpers 8 are disposed between the first breaking-side power transmission circuit 61 and the first power transmission circuit 71, and the plurality of first jumpers 8 are in one-to-one correspondence with the wires in the first power transmission circuit 71, the second jumpers 9 are disposed between the second breaking-side power transmission circuit 62 and the second power transmission circuit 72, and the plurality of second jumpers 9 are in one-to-one correspondence with the wires in the second power transmission circuit 72.
As shown in fig. 2, three first jumper wires 8 and three second jumper wires 9 are provided, the three first jumper wires 8 are respectively connected to three wires in the first power transmission loop 71, and the three second jumper wires 9 are respectively connected to three wires in the second power transmission loop 72. Three first jumper wires 8 are correspondingly connected with three wires in the first open-side power transmission circuit 61, respectively, and three second jumper wires 9 are correspondingly connected with three wires in the second open-side power transmission circuit 62, respectively. The three first jumper wires 8 are correspondingly connected with the three first connecting supports respectively, and the three second jumper wires 9 are correspondingly connected with the three second connecting supports respectively.
According to the double-circuit power transmission line breaking system, the first jumper wire 8 and the second jumper wire 9 are supported through the first connecting support 41 and the second connecting support 42, the first jumper wire 8 and the second jumper wire 9 are prevented from swinging greatly to discharge to a pole tower, and the stability and the safety of a power transmission line are improved.
In some embodiments, the double circuit transmission line breaking system further comprises a string of insulator fittings 5 connected to each of the connection brackets 4. In the present embodiment, the number of the insulator hardware strings 5 is the same as the number of the connecting brackets 4.
As shown in fig. 1, specifically, the number of the insulator string 5 is plural, the plurality of first connecting brackets 41 and the plurality of second connecting brackets 42 are each provided with the insulator string 5, the insulator string 5 is provided at the rear end of the first connecting bracket 41, and the insulator string 5 is provided at the rear end of the second connecting bracket 42. The insulator hardware string 5 is hung on the first connecting bracket and the second connecting bracket in the up-down direction.
The double-circuit power transmission line breaking method provided by the embodiment of the invention comprises the following steps of:
and newly building a switching tower at the switching side of the first power transmission line 6. It should be noted that the first power transmission line 6 is an existing power transmission line.
As shown in fig. 2, specifically, the open side of the first power transmission line 6 is the front side of the first power transmission line 6, that is, the open tower is located at the front side of the first power transmission line 6, and the open tower is the double-circuit power transmission line open tower described in any of the above embodiments.
The first transmission circuit 71 and the second transmission circuit 72 in the second transmission line 7 are connected to the open tower respectively. It should be noted that the second transmission line 7 is a newly-built transmission circuit, and when the first transmission circuit 71 and the second transmission circuit 72 are connected to the wire cross arm 3 in the open tower, the first transmission line 6 is in a charged state, and a jumper in the open-side transmission circuit of the first transmission line 6 still exists.
And disconnecting the first power transmission line 6, and removing a jumper wire on the disconnected side of the first power transmission line 6.
Specifically, in this step, when the jumper on the open side of the first transmission line 6 is removed, the open-side loop of the first transmission line 6 is divided into a first open-side transmission loop 61 and a second open-side transmission loop 62, wherein the left side of the first open-side transmission loop 61 is connected to one substation, and the right side of the second open-side transmission loop 62 is connected to another substation.
It should be noted that, in this step, the first power transmission line 6 is disconnected, that is, the first power transmission line 6 is in a power failure state, and a jumper between the first open-side power transmission circuit 61 and the second open-side power transmission circuit 62 of the first power transmission line 6 is removed.
A plurality of first jumpers 8 are installed between the first power transmission circuit 71 and the first open-side power transmission circuit 61 in the first power transmission line, and a plurality of second jumpers 9 are installed between the second power transmission circuit 72 and the second open-side power transmission circuit 62 in the first power transmission line.
Specifically, as shown in fig. 2, the first power transmission circuit 71 and the first open-side power transmission circuit 61 are connected by a first jumper 8, and the second power transmission circuit 72 and the second open-side power transmission circuit 62 are connected by a second jumper 9.
It should be noted that, in this step, both the first power transmission line 6 and the second power transmission line 7 are in the power-off state.
The first transmission line 6 and the second transmission line 7 are closed.
In this step, the first power transmission line 6 and the second power transmission line 7 are both in a live state, and at this time, the first open-side power transmission circuit 61 transmits power to the first power transmission circuit 71 through the first jumper 8, the second open-side power transmission circuit 62 transmits power to the second power transmission circuit 72 through the second jumper 9, and the power transmission circuits on the non-open side of the first power transmission line 6 are normally connected.
According to the double-circuit power transmission line disconnection method provided by the embodiment of the invention, only one base of double-circuit power transmission line disconnection tower is required to be newly built at the disconnection side of the existing power transmission line, a tension tower is not required to be newly built under the line of the existing power transmission line, and the existing power transmission line and the newly built power transmission line are not required to form a triangular connection line structure, so that the number and the floor area of the newly built towers can be reduced, the power-off time is shortened, the construction difficulty and the construction cost are reduced, the engineering investment is saved, long jumper wires connected with wires at two sides of a non-identical tower can be supported through the first connecting support and the second connecting support, the first jumper wire 8 and the second jumper wire 9 are prevented from greatly swinging to discharge to the towers, and the stability and the safety of the power transmission line are improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (7)
1. A dual circuit power transmission line disconnect system, comprising:
the double-circuit power transmission line on-off tower comprises a main frame, a ground wire cross arm, a plurality of wire cross arms and connecting supports, wherein the ground wire cross arm and the plurality of wire cross arms are respectively arranged on the main frame, the ground wire cross arm is arranged at the top of the main frame, the plurality of wire cross arms are arranged at intervals along the height direction of the main frame, a first ground wire hanging point and a second ground wire hanging point are arranged on the ground wire cross arm, a first wire hanging point and a second wire hanging point are arranged on the wire cross arm, each connecting support comprises a first connecting support and a second connecting support, the first connecting support is connected with the wire cross arm at the first wire hanging point on each wire cross arm, and the second connecting support is connected with the wire cross arm at the second wire hanging point on each wire cross arm;
the power transmission system comprises a first power transmission line and a second power transmission line, wherein the cut-off pole tower and the second power transmission line are positioned on the cut-off side of the first power transmission line, the cut-off pole tower is positioned between the first power transmission line and the second power transmission line, the first power transmission line is provided with a cut-off side power transmission loop, the second power transmission line is provided with a first power transmission loop and a second power transmission loop, the first power transmission loop is connected with a first wire hanging point on a wire cross arm, the second power transmission loop is connected with a second wire hanging point on the wire cross arm, and any two paths of the cut-off side power transmission loop, the first power transmission loop and the second power transmission loop are not intersected with each other;
many first jumps and many second jumps, first jump is established between cut-off side transmission of electricity circuit and the first transmission of electricity circuit, and many first jump with wire one-to-one in the first transmission of electricity circuit, the second jump is established between cut-off side transmission of electricity circuit and the second transmission of electricity circuit, and many the second jump with wire one-to-one in the second transmission of electricity circuit.
2. The double return power transmission line breaking system according to claim 1, wherein the plurality of wire cross arms are spaced apart in a height direction of the main frame, and the plurality of wire cross arms are arranged in parallel with each other.
3. A double-circuit power transmission line breaking system according to claim 1 or 2, wherein the angle between the wire cross-arm and the first and second connecting brackets connected thereto is 60 ° to 150 °.
4. A double circuit power transmission line disconnection system according to claim 1 or 2, wherein a plurality of first connecting brackets connected to a plurality of the wire cross-arms are parallel to each other, and a plurality of second connecting brackets connected to a plurality of the wire cross-arms are parallel to each other.
5. A double-circuit power transmission line breaking system according to claim 1, wherein the first wire hanging point is provided at a first end of the wire cross-arm and the second wire hanging point is provided at a second end of the wire cross-arm.
6. A double circuit power transmission line disconnection system according to claim 1, wherein the disconnection side power transmission circuit, the first power transmission circuit and the second power transmission circuit are all three-phase power transmission lines.
7. A double-circuit power transmission line breaking method, characterized in that, by using the double-circuit power transmission line breaking system of any one of the above claims 1 to 6, the breaking method comprises the steps of:
newly building a cut-off tower on the cut-off side of the first power transmission line;
respectively connecting a first power transmission loop and a second power transmission loop in a second power transmission line with a cut-off tower;
disconnecting the first power transmission line, and removing a jumper wire on the disconnected side of the first power transmission line;
installing a plurality of first jumper wires between the first power transmission loop and a cut-off side loop in the first power transmission line, and installing a plurality of second jumper wires between the second power transmission loop and the cut-off side loop in the first power transmission line;
and closing the first power transmission line and the second power transmission line.
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