Double-loop terminal tower suitable for high-voltage reactor and provided with down lead

Abstract

The utility model provides a high-resistance double-loop terminal tower with a down lead, which comprises a tower body, a ground wire cross arm, an upper-phase wire cross arm and a lower-phase wire cross arm, and is characterized in that two first wire tension string hanging points and two second wire tension string hanging points are respectively arranged on the front side and the rear side of the upper-phase wire cross arm; the front side and the rear side of the lower-phase wire cross arm are respectively provided with two third wire tension string hanging points. According to the utility model, the tower body, the ground wire cross arm, the upper-phase wire cross arm, the lower-phase wire cross arm and the wire tension string hanging points are optimally arranged, so that the electrical safety distance between a wire and a down lead is met. Compared with the conventional line engineering, one-base single-loop transposition tower can be reduced, so that the steel and land occupation of the iron tower is reduced, and the engineering investment is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of power transmission and transformation engineering, in particular to a double-circuit terminal tower suitable for high-voltage down conductors. Background Art

[0002] For AC transmission line projects with double circuits on the same tower, it is often necessary to install a high-voltage reactor between the terminal tower and the substation frame. The high-voltage reactor and the phase conductors of the line usually need to be connected with down conductors. Since the phase conductors of the conventional double-circuit terminal tower on the same tower are arranged vertically, if there is a down conductor, it will collide with the line conductor. Therefore, the general solution is to split the double-circuit terminal tower on the same tower into two single-circuit terminal towers. Utility Model Content

[0003] The utility model aims to provide a double-circuit terminal tower suitable for high-voltage down conductors. The utility model can avoid splitting the double-circuit terminal tower into two single-circuit terminal towers, thereby achieving the purpose of saving engineering investment.

[0004] To achieve the above-mentioned purpose, the utility model provides a double-circuit terminal tower suitable for high-resistance down-lead lines, comprising a tower body, a ground wire crossarm, an upper phase conductor crossarm, and a lower phase conductor crossarm, characterized in that two first conductor tension string hanging points and two second conductor tension string hanging points are respectively arranged on the front and rear sides of the upper phase conductor crossarm, and two third conductor tension string hanging points are respectively arranged on the front and rear sides of the lower phase conductor crossarm.

[0005] Furthermore, ground wire tension string hanging points are arranged on both ends of the ground wire cross arm.

[0006] Furthermore, the first conductor tension string hanging point, the second conductor tension string hanging point and the third conductor tension string hanging point suspend the conductors through a tension insulator string.

[0007] Furthermore, the length of the ground wire cross arm is not less than the length of the upper phase conductor cross arm.

[0008] The utility model has a bilaterally symmetrical structure, and through the optimized arrangement of the tower body, the ground wire cross arm, the upper phase conductor cross arm, the lower phase conductor cross arm and the conductor tension string hanging point, the electrical safety distance between the conductor and the down conductor is met. Compared with the previous line engineering, one single-circuit transposition tower can be reduced, thereby reducing the tower steel and land occupation, saving engineering investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model.

[0010] Figure 2 It is a side view of an application case of the utility model.

[0011] In the figure: 1. Tower body; 2. Ground wire cross arm; 3. Upper phase conductor cross arm; 4. Lower phase conductor cross arm; 5. First conductor tension string hanging point; 6. Second conductor tension string hanging point; 7. Third conductor tension string hanging point; 8. Down conductor; 9. High voltage reactor;

[0012] A, A-phase conductor; B, B-phase conductor; C, C-phase conductor. DETAILED DESCRIPTION

[0013] The preferred embodiments of the present invention are described below. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. The upper, lower, front, rear, left, and right positions in the specific embodiments are for the convenience of description.

[0014] See attached Figure 1 The utility model has a bilaterally symmetrical structure, including a tower body 1, a ground wire cross arm 2, an upper phase conductor cross arm 3, a lower phase conductor cross arm 4 and a plurality of conductor tension string hanging points, the upper phase conductor cross arm 3 is provided with a first conductor tension string hanging point 5 and a second conductor tension string hanging point 6 for hanging a tension insulator string on the front and rear sides, the lower phase conductor cross arm 4 is provided with a third conductor tension string hanging point 7 for hanging a tension insulator string on the front and rear sides, the first conductor tension string hanging point, the second conductor tension string hanging point and the third conductor tension string hanging point suspend the conductors through the tension insulator string.

[0015] Ground wire tension string hanging points are arranged on both ends of the ground wire cross arm.

[0016] The length of the ground wire cross arm is not less than the length of the upper phase conductor cross arm.

[0017] See attached Figure 2 , with Figure 2 Taking the connection of the A-phase conductor, B-phase conductor and C-phase conductor to the right-side loop of the substation as an example, first connect the A-phase conductor to the first conductor tension string hanging point 5 of the upper phase conductor crossarm 3, and then connect it to the A-phase of the substation frame, and connect the conductor to the high-voltage reactor 9 through the down conductor 8 in the middle.

[0018] The B-phase conductor is connected to the third conductor tension string hanging point 7 of the lower phase conductor cross arm 4, and then connected to the B-phase of the substation frame. The conductor is connected to the high-voltage reactor 9 through the down conductor 8 in the middle.

[0019] The C-phase conductor is connected to the second conductor tension string hanging point 6 of the upper phase conductor cross arm 3, and then connected to the C-phase of the substation frame. The conductor is connected to the high-voltage reactor 9 through the down conductor 8 in the middle.

[0020] The method of laying the left side loop of the line where the A-phase conductor, the B-phase conductor and the C-phase conductor are connected to the substation is the same as that of the right side loop of the line. First, the A-phase conductor is connected to the second conductor tension string hanging point 6 of the upper phase conductor crossarm 3, and then connected to the A phase of the substation frame. The conductor is connected to the high-voltage reactor 9 through the down conductor 8 in the middle.

[0021] The B-phase conductor is connected to the third conductor tension string hanging point 7 of the lower phase conductor cross arm 4, and then connected to the B-phase of the substation frame. The conductor is connected to the high-voltage reactor 9 through the down conductor 8 in the middle.

[0022] The C-phase conductor is connected to the first conductor tension string hanging point 5 of the upper phase conductor cross arm 3, and then connected to the C-phase of the substation frame. The conductor is connected to the high-voltage reactor 9 through the down conductor 8 in the middle.

[0023] To sum up, the horizontal distances between the first conductor tension string hanging point 5, the second conductor tension string hanging point 6 and the third conductor tension string hanging point 7 can be adjusted according to the rotation angle of the terminal tower to meet the electrical safety distance between the down conductor 8 and the conductor when it is led down. Since the utility model changes the double-circuit terminal tower conductors on the same tower from a vertical arrangement to an inverted triangle arrangement, a certain horizontal distance is left between the conductors of each phase, thereby avoiding the situation where the down conductor 8 hits the conductor.

Claims

1. A double-circuit terminal tower suitable for high-voltage down conductors, comprising a tower body, a ground wire cross arm, an upper phase conductor cross arm, and a lower phase conductor cross arm, characterized in that: Two first conductor tension string hanging points and two second conductor tension string hanging points are respectively arranged on the front and rear sides of the upper phase conductor cross arm, and two third conductor tension string hanging points are respectively arranged on the front and rear sides of the lower phase conductor cross arm. The first conductor tension string hanging points, the second conductor tension string hanging points and the third conductor tension string hanging points suspend the conductors through a tension insulator string.

2. A double-circuit terminal tower suitable for high-voltage down conductor according to claim 1, characterized in that: Ground wire tension string hanging points are arranged on both ends of the ground wire cross arm.

3. A double-circuit terminal tower suitable for high-voltage down conductor according to claim 1, characterized in that: The length of the ground wire cross arm is not less than the length of the upper phase conductor cross arm.

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