CN113258506A - Temporary connection power transmission method of overhead power transmission line - Google Patents
Temporary connection power transmission method of overhead power transmission line Download PDFInfo
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- CN113258506A CN113258506A CN202110639009.7A CN202110639009A CN113258506A CN 113258506 A CN113258506 A CN 113258506A CN 202110639009 A CN202110639009 A CN 202110639009A CN 113258506 A CN113258506 A CN 113258506A
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- power transmission
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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
- H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
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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
Abstract
The invention discloses a temporary connection power transmission method of an overhead power transmission line, which comprises the following steps: a first conductor for connecting to a first substation and a second conductor for connecting to a second substation; the temporary connection power transmission method comprises the following steps of: electrically disconnecting the first wire and the third wire, and electrically disconnecting the second wire and the fourth wire; and electrically connecting the first lead and the second lead through a short jumper so as to realize the electrical connection between the first substation and the second substation. The temporary connection power transmission method of the overhead power transmission line provided by the embodiment of the invention can meet the temporary power transmission requirement under special conditions.
Description
Technical Field
The invention relates to the technical field of power transmission lines, in particular to a temporary connection power transmission method of an overhead power transmission line.
Background
In the related art, a power grid comprises a first transformer substation, a second transformer substation and a third transformer substation, the first transformer substation and the third transformer substation and the second transformer substation and the third transformer substation are connected through an overhead transmission line, and when the third transformer substation cannot be used due to reasons such as faults, the power supply of the first transformer substation or the second transformer substation is affected.
For example, as shown in fig. 1, a first substation 100 and a second substation 200 are electrically connected by a third power transmission line 700, and power is supplied to a first region by the first substation 100 and power is supplied to a second region by the second substation 200. With the development of economy in China, the power demand is increasing day by day, and the grid structure of the power system is becoming more and more complex and perfect. The existing overhead transmission line is disconnected, and pi is connected to the newly-built third substation 300, so that the existing overhead transmission line is a relatively wide power grid network frame perfecting form at present. Specifically, as shown in fig. 2, a newly-built third substation 300 is pi-connected between a first substation 100 and a second substation 200, and at this time, the first substation 100 and the third substation 300 are connected through a first power transmission line 500, and the second substation 200 and the third substation 300 are connected through a second power transmission line 600.
If the construction progress of the third substation 300 lags behind the line construction progress; or after the whole project is built, the newly built third substation 300 is found to be incapable of being normally put into operation for various reasons. At this time, the third transmission line 700 connecting the first substation 100 and the second substation 200 is disconnected, but since the newly-built third substation 300 cannot be put into operation normally, the power supply of the first substation 100 or the second substation 200 is affected, and especially in some extreme cases, if the first substation 100 is the only power supply source of the second substation 200, the second substation 200 is powered off for a long time, which affects the power supply in the second area.
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 temporary connection power transmission method of an overhead power transmission line, so as to meet the temporary power transmission requirement under special conditions.
According to the temporary connection power transmission method of the overhead power transmission line provided by the embodiment of the invention, the overhead power transmission line comprises the following steps:
a first conductor for connecting to a first substation and a second conductor for connecting to a second substation;
the temporary connection power transmission method comprises the following steps of:
electrically disconnecting the first wire and the third wire, and electrically disconnecting the second wire and the fourth wire;
and electrically connecting the first lead and the second lead through a short jumper so as to realize the electrical connection between the first substation and the second substation.
The temporary connection power transmission method of the overhead power transmission line can meet the temporary power transmission requirement under special conditions.
In some embodiments, the third conductor is electrically connected to the first conductor by a first jumper, the fourth conductor is electrically connected to the second conductor by a second jumper, each of the first, second, third, and fourth conductors disposed on a termination tower;
removing the first jumper connected between the first conductor and the third conductor at the terminal tower to break the electrical connection between the first conductor and the third conductor, and removing the second jumper connected between the second conductor and the fourth conductor at the terminal tower to break the electrical connection between the second conductor and the fourth conductor.
In some embodiments, one end of the short jumper is connected to the first wire through a first clip, and the other end of the short jumper is connected to the second wire through a second clip, so that the first wire and the second wire are electrically connected through the short jumper.
In some embodiments, the three phases of the first conductor and the three phases of the second conductor are arranged in the same order in the vertical direction, and the three phases of the short jumper are arranged at intervals in the vertical direction.
In some embodiments, an arrangement order of three phases of the first wire in a vertical direction is different from an arrangement order of three phases of the second wire in the vertical direction, and the three phases of the short jumper are disposed at intervals in the first horizontal direction.
In some embodiments, a connection point of each phase of the short jumper and a corresponding phase of the first wire is taken as a first connection point, a connection point of each phase of the short jumper and a corresponding phase of the second wire is taken as a second connection point, three first connection points are arranged at intervals in a first horizontal direction, three second connection points are arranged at intervals in the first horizontal direction, and each of the three first connection points is arranged at intervals in the first horizontal direction from each of the three second connection points.
In some embodiments, a connection point of each phase of the short jumper and a corresponding phase of the first wire is used as a first connection point, a connection point of each phase of the short jumper and a corresponding phase of the second wire is used as a second connection point, and a distance between each of the first connection point and the second connection point and the strain clamp is greater than or equal to a first set distance.
In some embodiments, the first set distance is 1.8km to 2.2 km.
In some embodiments, the overhead transmission line further comprises:
a first optical cable for connecting a first substation and a second optical cable for connecting a second substation;
a third optical cable and a fourth optical cable for connecting a third substation, the third optical cable communicatively connected to the first optical cable, the fourth optical cable communicatively connected to the second optical cable, the temporary connection power delivery method further comprising the steps of:
disconnecting communications between the first fiber optic cable and the third fiber optic cable, disconnecting communications between the second fiber optic cable and the fourth fiber optic cable;
communicatively connecting the first fiber optic cable and the second fiber optic cable over a lead fiber optic cable to enable a communicative connection between the first substation and the second substation.
In some embodiments, the first fiber optic cable is communicatively coupled to a first cable head and the second fiber optic cable is communicatively coupled to a second cable head;
connecting said first cable head and said second cable head by means of said lead cable communication, so as to connect said first cable and said second cable by means of a lead cable communication.
Drawings
Fig. 1 is a schematic diagram of a microgrid structure in the related art.
Fig. 2 is a schematic diagram of the power grid structure of fig. 1 pi after the new power transformation is accessed.
Fig. 3 is a schematic diagram of the structure in the vicinity of the third substation in fig. 2.
Fig. 4 is a schematic diagram of a power grid structure of a temporary connection power transmission method of an overhead power transmission line according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of the structure before the first jumper is removed at the terminal tower.
Fig. 6 is a schematic diagram of the structure of the terminal tower with the first jumper removed.
Fig. 7 is a schematic view of the structure in the vicinity of the terminal tower in fig. 4.
Fig. 8 is an enlarged view at D in fig. 7.
Fig. 9 is a front view of fig. 8.
Fig. 10 is a schematic view of the structure in the vicinity of the terminal tower in fig. 4.
Fig. 11 is an enlarged view at E in fig. 10.
Reference numerals:
a first substation 100;
a second substation 200;
a third substation 300;
a third substation gantry 400;
a first transmission line 500;
a second transmission line 600;
a third transmission line 700;
a first corner tower 1; a second corner tower 2, a branch tower 3; a terminal tower 4; a straight line tower 5;
a first conductive line 6; a phase a first conductive line 601; a first wire 6011; a second wire 6012; a B-phase first conductive line 602; a C-phase first wire 603;
a second conductive line 7; a phase a second wire 701; a B-phase second conductive line 702; a C-phase second wire 703;
a short jumper 8;
a wire clamp 9;
a strain clamp 10;
a third conductive line 11;
a fourth conductive line 12;
a first jumper 13.
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 drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 4 to 11, the overhead power transmission line of the temporary connection power transmission method of the overhead power transmission line according to the embodiment of the present invention includes a first conductor 6 for connecting a first substation 100 and a second conductor 7 for connecting a second substation 200. The overhead transmission line further comprises a third conductor 11 and a fourth conductor 12 for connecting a third substation 300, the third conductor 11 being electrically connected to the first conductor 6 and the fourth conductor 12 being electrically connected to the second conductor 7.
The temporary connection power transmission method comprises the following steps:
the electrical connection between the first wire 6 and the third wire 11 is broken, and the electrical connection between the second wire 7 and the fourth wire 12 is broken;
the first conductor 6 and the second conductor are electrically connected by a short jumper 8 in order to achieve an electrical connection between the first substation 100 and the second substation 200.
When the first substation 100, the second substation 200 and the third substation 300 are all stably operated, the first substation 100 and the third substation 300 are electrically connected, power can be supplied to the third substation 300 through the first substation 100, power can also be supplied to the first substation 100 through the third substation 300, power can be supplied to the third substation 300 through the second substation 200, and power can also be supplied to the second substation 200 through the third substation 300. And supplies power to the first region using the first substation 100, to the second region using the second substation 200, and to the third region using the third substation.
When the third substation 300 is not usable due to a fault or other reasons, the electrical connection between the first conductor 6 and the third conductor 11 may be broken, and the electrical connection between the second conductor 7 and the fourth conductor 12 may be broken. And the first and second wires 6 and 200 are electrically connected by the short jumper 8, thereby achieving the electrical connection between the first and second substations 100 and 200. Further, the first substation 100 and the second substation 200 are electrically connected, so that power can be supplied to the second substation 200 through the first substation 100, and power can also be supplied to the first substation 100 through the second substation 200. Thereby avoiding the influence on the power supply of the first or second region due to the unavailability of the third substation 300.
For example, as shown in fig. 1 and 2, a newly-built third substation 300 is pi-connected between a first substation 100 and a second substation 200, and if the construction schedule of the third substation 300 lags behind the construction of a line connected to the third substation 300, when a power transmission line 500 connecting the first substation 100 and the second substation 200 has been disconnected but the construction of the third substation 300 has not been completed, the electrical connection between the first substation 100 and the second substation 200 cannot be realized through the third substation 300. If the first substation 100 is the only power supply source for the second substation 200, the second substation 200 will affect the power supply in the second area. At this time, according to the temporary connection power transmission method of the embodiment of the present invention, the first substation 100 and the second substation 200 can be electrically connected to each other, so that power can be supplied to the second substation 200 through the first substation 100, and thus, the influence on the power supply in the second area due to the unavailability of the third substation 300 can be avoided.
Therefore, the temporary connection power transmission method of the overhead power transmission line according to the embodiment of the invention can meet the temporary power transmission requirement under special conditions, reduce power utilization inconvenience caused to users due to power failure and reduce economic loss of the users due to power failure.
In some embodiments, the third conductor 11 is electrically connected to the first conductor 6 by a first jumper 13. The fourth wire is electrically connected with the second wire 7 through a second jumper, and the first wire 6, the second wire 7, the third wire 11 and the fourth wire are all arranged on the terminal tower 4. That is, the portion of the third conductor 11 connected to (erected on) the terminal tower 4 is electrically connected to the portion of the first conductor 6 connected to (erected on) the terminal tower 4 by the first jumper 13, and the portion of the fourth conductor connected to (erected on) the terminal tower 4 is electrically connected to the portion of the second conductor 7 connected to (erected on) the terminal tower 4 by the second jumper.
A first jumper 13 connected between the first conductor 6 and the third conductor 11 is removed at the terminal tower 4 to break the electrical connection between the first conductor 6 and the third conductor 11. A second jumper connected between the second conductor 7 and the fourth conductor is removed at the termination tower 4 to break the electrical connection between the second conductor 7 and the fourth conductor.
Thereby, the electric connection between the first wire 6 and the third wire 11 and the electric connection between the second wire 7 and the fourth wire are conveniently disconnected, thereby facilitating the temporary power transmission of the overhead power transmission line.
In order to make the technical solution of the present application easier to understand, the following further describes the technical solution of the present application by taking the example that the first conductor 6 and the second conductor 7 are disposed on the same iron tower, and the first conductor 6, the second conductor 7, the third conductor 11 and the fourth conductor 12 are connected at the terminal tower.
As shown in fig. 3 and 4, the first conductor 6 extends in the direction of arrow F through the plurality of tangent towers 5, the branch tower 3, and the first turret 1 to be electrically connected to the first substation 100, and the second conductor 7 extends in the direction of arrow G through the plurality of tangent towers 5, the branch tower 3, and the second turret 2 to be electrically connected to the second substation 200. The first wire 6 and the third wire 11 are electrically connected by a first jumper 11, and the second wire 7 and the fourth wire 12 are electrically connected by a second jumper. The third and fourth wires 11, 12 are electrically connected to the third substation 300 via a third substation gantry 400 of the third substation 300.
When the third substation 300 is not usable due to a fault or other reasons, the first jumper 13 between the first conductor 6 and the third conductor 11 is removed, and the second jumper between the second conductor 7 and the fourth conductor 12 is removed. Thereafter, as shown in fig. 7 to 11, the first and second wires 6 and 200 are electrically connected by the short jumper 8, thereby achieving the electrical connection between the first and second substations 100 and 200. Thereby achieving an electrical connection between the first substation 100 and the second substation 200.
In other embodiments, the first conductor and the second conductor may be disposed on different pylons.
In some embodiments, one end of the short jumper 8 is connected to the first wire 6 by a first clip, and the other end of the short jumper 8 is connected to the second wire 7 by a second clip, so that the first wire 6 and the second wire 7 are electrically connected by the short jumper 8.
As shown in fig. 7 to 11, the first conductive line 6 includes an a-phase first conductive line 601, a B-phase first conductive line 602, and a C-phase first conductive line 603, and the second conductive line 7 includes an a-phase second conductive line 701, a B-phase second conductive line 702, and a C-phase second conductive line 703. Each of the a-phase first conductive line 601, the B-phase first conductive line 602, and the C-phase first conductive line 603 is a double split conductive line, and each of the a-phase second conductive line 701, the B-phase second conductive line 702, and the C-phase second conductive line 703 is a double split conductive line. For example, the a-phase first wire 601 includes a first wire 6011 and a second wire 6012, the short jumper 8 is electrically connected to the a-phase first wire 601 (the first wire 6011 and the second wire 6012) through a four-change two clamp (a first clamp), and the other end of the short jumper 8 is electrically connected to the a-phase second wire 701 through a four-change two clamp (a second clamp).
From this, conveniently realize being connected between short circuit jumper wire 8 and the first wire 6 through first fastener, conveniently realize being connected between short circuit wire 8 and the second wire 7 through the second fastener to conveniently realize the electricity between first wire 6 and the second wire 7 through short circuit jumper wire 8 and be connected, and then conveniently realize overhead transmission line's interim power transmission.
In some embodiments, the three phases of the first conductor 6 and the three phases of the second conductor 7 are arranged in the same order in the vertical direction, and the three phases of the short jumper 8 are provided at intervals in the vertical direction.
For example, as shown in fig. 7, the first conductive line 6 includes an a-phase first conductive line 601, a B-phase first conductive line 602, and a C-phase first conductive line 603, the a-phase first conductive line 601 is located above the B-phase first conductive line 602 in the vertical direction, the B-phase first conductive line 602 is located above the C-phase first conductive line 603 in the vertical direction, the a-phase second conductive line 701 is located above the B-phase second conductive line 702 in the vertical direction, the B-phase second conductive line 702 is located above the C-phase second conductive line 703 in the vertical direction, that is, the a-phase, the B-phase, and the C-phase of the first conductive line 6 are sequentially arranged from top to bottom, and the a-phase, the B-phase, and the C-phase of the second conductive line 7 are sequentially arranged from top to bottom. Thereby, the arrangement order of the three phases of the first wire 6 and the three phases of the second wire 7 in the vertical direction is the same.
Accordingly, the short jumper 8 includes an a-phase short wire 801, a B-phase short wire 802, and a C-phase short wire 803, the a-phase short wire 801 is located above the B-phase short wire 802 in the vertical direction, and the B-phase short wire 802 is located above the C-phase short wire 803 in the vertical direction. The phase a short circuit wire 801, the phase B short circuit wire 802 and the phase C short circuit wire 803 are sequentially spaced from top to bottom, that is, three phases of the short circuit jumper 8 are vertically spaced.
Therefore, the requirements on the discharge distance between the wires in different phases can be met between the A-phase short-circuit wire 801 and the B-phase short-circuit wire 802 and between the B-phase short-circuit wire 802 and the C-phase short-circuit wire 803, and the safety of temporary power transmission is improved.
In some embodiments, an arrangement order of three phases of the first wire 6 in the vertical direction and an arrangement order of three phases of the second wire 7 in the vertical direction are different, and three phases of the short jumper wires 8 are disposed at intervals in the first horizontal direction.
For example, as shown in fig. 10, the first conductive line 6 includes an a-phase first conductive line 601, a B-phase first conductive line 602, and a C-phase first conductive line 603, and the second conductive line 7 includes an a-phase second conductive line 701, a B-phase second conductive line 702, and a C-phase second conductive line 703. The phase a first wire 601 is located above the phase B first wire 602 in the vertical direction, the phase B first wire 602 is located above the phase C first wire 603 in the vertical direction, the phase B second wire 702 is located above the phase C second wire 703 in the vertical direction, the phase C second wire 703 is located above the phase a second wire 701 in the vertical direction, that is, the phase a, the phase B, and the phase C of the first wire 6 are sequentially arranged from top to bottom, and the phase B, the phase C, and the phase a of the second wire 7 are sequentially arranged from top to bottom. Thereby, the three phases of the first wire 6 and the three phases of the second wire 7 are arranged in different orders in the vertical direction.
Accordingly, the short jumper 8 includes an a-phase short wire 801, a B-phase short wire 802, and a C-phase short wire 803, the a-phase short wire 801 is located above the B-phase short wire 802 in the vertical direction, and the B-phase short wire 802 is located above the C-phase short wire 803 in the vertical direction. Phase a short circuit conductor 801 is arranged adjacent to terminal tower 4 in the first horizontal direction, phase C short circuit conductor 803 is arranged adjacent to straight line tower 5 in the first horizontal direction, phase B short circuit conductor 802 is located between phase a short circuit conductor 801 and phase C short circuit conductor 803 in the first horizontal direction, phase B short circuit conductor 802 and phase a short circuit conductor 801 are arranged at intervals in the first horizontal direction, phase B short circuit conductor 802 and phase C short circuit conductor 803 are arranged at intervals in the first horizontal direction, and phase a short circuit conductor 801, phase B short circuit conductor 802 and phase C short circuit conductor 803 are arranged at intervals in the first horizontal direction. Wherein the first horizontal direction substantially coincides with the arrangement direction of the linear towers 5 and the terminal towers 4.
Therefore, the requirements on the discharge distance between the wires in different phases can be met between the A-phase short-circuit wire 801 and the B-phase short-circuit wire 802 and between the B-phase short-circuit wire 802 and the C-phase short-circuit wire 803, and the safety of temporary power transmission is improved.
In some embodiments, the connection point of each phase of the short jumper 8 with the corresponding phase of the first wire 6 is taken as the first connection point, and the connection point of each phase of the short jumper 8 with the corresponding phase of the second wire 7 is taken as the second connection point.
The three first connection points are arranged at intervals in the first horizontal direction, the three second connection points are arranged at intervals in the first horizontal direction, and each of the three first connection points is arranged at intervals in the first horizontal direction with each of the three second connection points.
For example, as shown in fig. 10, the first horizontal direction is substantially the same as the arrangement direction of the tangent tower 5 and the terminal tower 4, and the three first connection point ratios are a connection point of the a-phase short jumper 8 and the a-phase first wire 6 (a-phase first connection point), a connection point of the B-phase short jumper 8 and the B-phase first wire 6 (B-phase first connection point), and a connection point of the C-phase short jumper 8 and the C-phase first wire 6 (C-phase first connection point). The three second connection point ratios are a connection point of the a-phase short circuit jumper 8 and the a-phase second wire 7 (a-phase second connection point), a connection point of the B-phase short circuit jumper 8 and the B-phase second wire 7 (B-phase second connection point), and a connection point of the C-phase short circuit jumper 8 and the C-phase second wire 7 (C-phase second connection point). The first phase connecting point A, the first phase connecting point B, the first phase connecting point C, the second phase connecting point A, the second phase connecting point B and the second phase connecting point C are arranged at intervals in the first horizontal direction.
Therefore, the requirements of the discharge distance between the wires in different phases can be better met between the A-phase short-circuit wire 801 and the B-phase short-circuit wire 802 and between the B-phase short-circuit wire 802 and the C-phase short-circuit wire 803, and the safety of temporary power transmission is improved.
Preferably, the distance between two adjacent connection points (two adjacent first connection points, two adjacent second connection points, or one adjacent first connection point and one adjacent second connection point) in the first horizontal direction is 5 km.
In some embodiments, a distance between each of the first and second connection points and the strain clamp is greater than or equal to a first set distance.
As shown in fig. 9, the distance between the first connection point and the strain clamp is L1, and L1 is greater than the first set distance. Therefore, the requirement of the discharge distance between the first connecting point and the strain clamp can be met, and the safety of temporary power transmission is improved.
As shown in fig. 11, the distance between the second connection point of the phase a and the strain clamp is L1, the distance between the second connection point of the phase B and the strain clamp is L2, and the distance between the second connection point of the phase C and the strain clamp is L3, wherein L3 is greater than L2, L2 is greater than L1, and L1 is greater than the first predetermined distance. Therefore, the requirement of the discharge distance between the second connection point and the strain clamp can be met, and the safety of temporary power transmission is improved.
Preferably, the first set distance is 1.8km to 2.2 km.
In some embodiments, the overhead transmission line further comprises a first optical cable for connecting the first substation 100 and a second optical cable for connecting the second substation 200. The overhead transmission line further comprises a third optical cable and a fourth optical cable for connecting a third transformer substation, wherein the third optical cable is in communication connection with the first optical cable, and the fourth optical cable is in communication connection with the second optical cable.
The temporary connection power transmission method further includes the steps of:
disconnecting the communication connection between the first optical cable and the third optical cable, and disconnecting the communication connection between the second optical cable and the fourth optical cable;
the first and second fiber optic cables are communicatively connected via the lead cable to enable a communicative connection between the first substation 100 and the second substation 200.
Therefore, for the overhead transmission line with the optical cable communication requirement, the communication channel connection between the first substation 100 and the second substation 200 can be realized, and the optical cable communication channel of the first substation 100 and the second substation 200 is formed.
In some embodiments, the first fiber optic cable is communicatively coupled to a first cable head and the second fiber optic cable is communicatively coupled to a second cable head. The first cable head and the second cable head are connected by lead cable communication, so that the first cable and the second cable are connected by lead cable communication.
For example, two cable head boxes on a third substation gantry 400 of the third substation 300 are connected together with a guide cable at the gantry, thereby facilitating a communication channel connection between the first substation 100 and the second substation 200.
The temporary connection power transmission method of the overhead power transmission line provided by the embodiment of the invention has the following advantages:
(1) the construction cost is low: the construction amount of newly built iron towers and other lines is not increased;
(2) is convenient and flexible: only the jumper wire of the original line terminal tower needs to be removed, and the temporary short-circuit wire connected by the wire clamp is installed, so that the disassembly and the assembly are convenient;
(3) the application range is wide: the method is applicable regardless of the phase sequence arrangement condition of the lines on the left side and the right side of the lines.
In summary, the temporary connection power transmission method for the overhead power transmission line according to the embodiment of the invention has the advantages of convenience in disassembly and assembly, convenience and flexibility, wide application range, low engineering cost and capability of meeting the temporary power transmission requirement under special conditions.
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 expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; 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 a middle chord medium, or they may be connected internally or in any other manner known to those skilled in the art, unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first or second feature or indirectly contacting the first or second feature through a middle chord medium. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate 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 is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, 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 (10)
1. A temporary connection power transmission method of an overhead power transmission line is characterized in that the overhead power transmission line comprises the following steps:
a first conductor for connecting to a first substation and a second conductor for connecting to a second substation;
the temporary connection power transmission method comprises the following steps of:
electrically disconnecting the first wire and the third wire, and electrically disconnecting the second wire and the fourth wire;
and electrically connecting the first lead and the second lead through a short jumper so as to realize the electrical connection between the first substation and the second substation.
2. The temporary connection power transmission method according to claim 1, wherein the third wire is electrically connected to the first wire by a first jumper, the fourth wire is electrically connected to the second wire by a second jumper, and each of the first wire, the second wire, the third wire, and the fourth wire is provided on a terminal tower;
removing the first jumper connected between the first conductor and the third conductor at the terminal tower to break the electrical connection between the first conductor and the third conductor, and removing the second jumper connected between the second conductor and the fourth conductor at the terminal tower to break the electrical connection between the second conductor and the fourth conductor.
3. The temporary connection power transmission method according to claim 1, wherein one end of the short jumper is connected to the first wire by a first clip, and the other end of the short jumper is connected to the second wire by a second clip, so that the first wire and the second wire are electrically connected by the short jumper.
4. The temporary connection power transmission method according to any one of claims 1 to 3, wherein three phases of the first wire and three phases of the second wire are arranged in the same order in a vertical direction, and three phases of the short jumper are provided at intervals in the vertical direction.
5. The temporary connection power transmission method according to any one of claims 1 to 3, wherein an arrangement order of three phases of the first wire in a vertical direction is different from an arrangement order of three phases of the second wire in the vertical direction, and the three phases of the short jumper are provided at intervals in a first horizontal direction.
6. The temporary connection power transmission method according to claim 5, wherein a connection point of each phase of the short jumper and a corresponding phase of the first wire is a first connection point, a connection point of each phase of the short jumper and a corresponding phase of the second wire is a second connection point, three first connection points are provided at intervals in a first horizontal direction, three second connection points are provided at intervals in the first horizontal direction, and each of the three first connection points is provided at intervals in the first horizontal direction from each of the three second connection points.
7. The temporary connection power transmission method according to any one of claims 1 to 3, wherein a connection point of each phase of the short jumper and a corresponding phase of the first wire is used as a first connection point, a connection point of each phase of the short jumper and a corresponding phase of the second wire is used as a second connection point, and a distance between each of the first connection point and the second connection point and a strain clamp is equal to or greater than a first set distance.
8. The temporary connection power transmission method according to claim 7, wherein the first set distance is 1.8km to 2.2 km.
9. The temporary connection power transmission method according to any one of claims 1 to 3, wherein the overhead power transmission line further includes:
a first optical cable for connecting a first substation and a second optical cable for connecting a second substation;
a third optical cable and a fourth optical cable for connecting a third substation, the third optical cable communicatively connected to the first optical cable, the fourth optical cable communicatively connected to the second optical cable, the temporary connection power delivery method further comprising the steps of:
disconnecting communications between the first fiber optic cable and the third fiber optic cable, disconnecting communications between the second fiber optic cable and the fourth fiber optic cable;
communicatively connecting the first fiber optic cable and the second fiber optic cable over a lead fiber optic cable to enable a communicative connection between the first substation and the second substation.
10. The temporary connection power delivery method of claim 9, wherein the first optical cable is communicatively connected to a first cable head and the second optical cable is communicatively connected to a second cable head;
connecting said first cable head and said second cable head by means of said lead cable communication, so as to connect said first cable and said second cable by means of a lead cable communication.
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| CN113258506B (en) | 2022-10-28 |
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