Novel PTJ tower for pi connection of far-end side of double-circuit line on same tower

Abstract

The utility model relates to a novel PTJ tower for Pi connection at the far-end side of a double-circuit line on the same tower, which comprises a tower body, an original line ground wire cross arm is arranged at the top of the tower body, and a B-circuit upper-phase lead cross arm, a B-circuit middle-phase lead cross arm and a B-circuit lower-phase lead cross arm are sequentially arranged below the original line ground wire cross arm. The B-loop upper-phase wire cross arm, the B-loop middle-phase wire cross arm and the B-loop lower-phase wire cross arm are respectively connected with a B-loop phase sequence wire B1, a B-loop phase sequence wire B2 and a B-loop phase sequence wire B3; an A-loop upper-phase wire cross arm, an A-loop middle-phase wire cross arm and an A-loop lower-phase wire cross arm are sequentially arranged below the B-loop lower-phase wire cross arm, and the A-loop upper-phase wire cross arm, the A-loop middle-phase wire cross arm and the A-loop lower-phase wire cross arm are connected with an A-loop phase sequence wire A1, an A-loop phase sequence wire A2 and an A-loop phase sequence wire A3 respectively. According to the PTJ tower, the three-phase wire cross arms for pi connection are additionally arranged, so that pi connection of lines can be completed by one base tower, and meanwhile, smooth connection of non-pi connection lines under the condition that line parameters do not change greatly is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of power transmission lines, in particular to a novel PTJ tower used for π connection at the far end side of a double-circuit line on the same tower. Background Art

[0002] With the rapid development of power transmission line construction in my country, the line density continues to increase, and the grid planning has become more complicated. In order to meet the power supply demand, a large number of line π connection projects are needed to support the transmission requirements and grid layout. π connection has many advantages over other wiring methods. Compared with other access methods, π connection is easy to implement, does not require the construction of a complete transmission line, has low construction cost, and can form a ring network power supply, which is conducive to the reliability and stability of power supply. However, the traditional double-circuit remote π connection on the same tower is to drill through the π-connected double-circuit line on the same tower, and then the new π-connected branch tower is connected to the original line. The connection position of this π connection scheme is easily affected by the terrain conditions of the original line, the pole tower and the tower shape, and it is difficult to implement. In addition, the construction of multiple towers not only has a large investment, a long construction period, and occupies a large area of ​​land resources and line corridors.

[0003] To this end, the present application proposes a new PTJ tower for π-connection at the far end of double-circuit lines on the same tower, which integrates the traditional multi-tower π-connection into one tower to solve the above problems. Utility Model Content

[0004] The utility model provides a novel PTJ tower for π-connection at the far end of a double-circuit line on the same tower.

[0005] The specific technical scheme of the utility model is: a new PTJ tower for π-connection at the far end side of double-circuit lines on the same tower, comprising a tower body, wherein an original line ground wire cross arm is arranged at the top of the tower body, and a B-circuit upper phase conductor cross arm, a B-circuit middle phase conductor cross arm and a B-circuit lower phase conductor cross arm are arranged in sequence below the original line ground wire cross arm, and the B-circuit upper phase conductor cross arm, the B-circuit middle phase conductor cross arm and the B-circuit lower phase conductor cross arm are connected to the B-circuit phase sequence conductor B1, the B-circuit phase sequence conductor B2 and the B-circuit phase sequence conductor B3 through hanging points respectively; an A-circuit upper phase conductor cross arm, an A-circuit middle phase conductor cross arm and an A-circuit lower phase conductor cross arm are arranged in sequence below the B-circuit lower phase conductor cross arm, and the A-circuit upper phase conductor cross arm, the A-circuit middle phase conductor cross arm and the A-circuit lower phase conductor cross arm are connected to the A-circuit phase sequence conductor A1, the A-circuit phase sequence conductor A2 and the A-circuit phase sequence conductor A3 respectively.

[0006] Further, preferably, the B-loop phase-sequence conductor B1, B2 and B3 and the A-loop phase-sequence conductor A1, A2 and A3 are all double-loop line conductors.

[0007] Furthermore, preferably, a newly constructed line ground crossarm is provided between the original line ground crossarm and the B-loop upper phase conductor crossarm, and the original line ground crossarm and the newly constructed line ground crossarm provide lightning protection for the B double-circuit line conductors and the A double-circuit line conductors respectively.

[0008] Further, preferably, the A-loop upper phase conductor cross arm, the A-loop middle phase conductor cross arm and the A-loop lower phase conductor cross arm are arranged in a T-shape.

[0009] The beneficial effects of the utility model are as follows: the new PTJ tower adds a three-phase conductor cross arm for π connection in the existing double-circuit transmission line, so that the line π connection can be completed on one tower, reducing the number of towers, and ensuring that the non-π connection line can be smoothly connected without a significant change in line parameters. Compared with the traditional three-tower π connection, the π connection of the present application reduces the restrictions of the original line tower pole base tower shape on the π connection, can provide a better location selection for the π connection, and at the same time uses a separate cross arm for single-phase conductor connection, avoiding the situation where the tension is concentrated on one side of the cross arm, which is conducive to improving the safety of the pole tower, and the π connection line of the tower is a drilling and crossing method, which shortens the crossing distance of the line compared to the crossing method of the three-tower π connection, and can greatly reduce the line investment. In general, the PTJ tower has a simple structure, occupies a small area of ​​land resources and line corridors, has good safety and stability performance, and has a low engineering investment, and has a good value for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the structure of a new PTJ tower for π-connection at the far end of a double-circuit line on the same tower according to the utility model;

[0011] In the figure: 1-ground wire cross arm of original line, 2-ground wire cross arm of new line, 3-B return upper phase conductor cross arm, 4-B return middle phase conductor cross arm, 5-B return lower phase conductor cross arm, 6-A return upper phase conductor cross arm, 7-A return middle phase conductor cross arm, 8-A return lower phase conductor cross arm, 9-B return phase sequence conductor B1, 10-B return phase sequence conductor B2, 11-B return phase sequence conductor B3, 12-A return phase sequence conductor A1, 13-A return phase sequence conductor A2, 14-A return phase sequence conductor A3, 15-tower body. DETAILED DESCRIPTION

[0012] In order to make the technical problems and technical solutions solved by the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0013] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0014] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0015] like Figure 1 As shown, a new PTJ tower for π-connection at the far end of a double-circuit line on the same tower comprises a tower body 15. An original line ground wire cross arm 1 is arranged on the top of the tower body 15. A B-circuit upper phase conductor cross arm 3, a B-circuit middle phase conductor cross arm 4 and a B-circuit lower phase conductor cross arm 5 are arranged in sequence below the original line ground wire cross arm 1. The B-circuit upper phase conductor cross arm 3, the B-circuit middle phase conductor cross arm 4 and the B-circuit lower phase conductor cross arm 5 are connected to the B-circuit phase sequence conductor B1 9, the B-circuit phase sequence conductor B2 10 and the B-circuit phase sequence conductor B3 11 through hanging points respectively; an A-circuit upper phase conductor cross arm 6, an A-circuit middle phase conductor cross arm 7 and an A-circuit lower phase conductor cross arm 8 are arranged in sequence below the B-circuit lower phase conductor cross arm 5. The A-circuit upper phase conductor cross arm 6, the A-circuit middle phase conductor cross arm 7 and the A-circuit lower phase conductor cross arm 8 are connected to the A-circuit phase sequence conductor A1 12, the A-circuit phase sequence conductor A2 13 and the A-circuit phase sequence conductor A3 14 respectively.

[0016] As mentioned above, the B-loop phase-sequence conductor B1 9, the B-loop phase-sequence conductor B2 10 and the B-loop phase-sequence conductor B3 11 and the A-loop phase-sequence conductor A1 12, the A-loop phase-sequence conductor A2 13 and the A-loop phase-sequence conductor A3 14 are all double-loop line conductors;

[0017] The B-loop upper phase conductor cross arm 3, the B-loop middle phase conductor cross arm 4 and the B-loop lower phase conductor cross arm 5 are conventionally arranged;

[0018] The A-loop upper phase conductor cross arm 6, the A-loop middle phase conductor cross arm 7 and the A-loop lower phase conductor cross arm 8 are arranged in a T shape.

[0019] During wiring, the B-loop three-phase conductor and the original line ground wire are connected via the B-loop three-phase crossarm on the PTJ tower and the original line ground wire crossarm to complete the line transition connection, while the A-loop three-phase conductor is the far-end π-connected line, and it is π-connected to the new line ground wire via the A-loop three-phase crossarm on the PTJ tower and the new line ground wire crossarm to complete the π-connection.

[0020] The new PTJ tower adds a three-phase conductor cross arm for π connection to the existing double-circuit transmission line, so that the line π connection can be completed on one tower, reducing the number of towers, and ensuring that the non-π connection line is smoothly connected without major changes in line parameters. Compared with the traditional multi-tower π connection, the π connection of the present application reduces the restrictions of the original line tower pole base tower shape on the π connection, can provide a better location selection for the π connection, and at the same time uses a separate cross arm to connect the single-phase conductor, avoiding the situation where the tension is concentrated on one side of the cross arm, which is conducive to improving the safety of the tower, and the π connection line of the tower is a drilling and crossing method, which shortens the crossing distance of the line compared to the crossing method of the multi-tower π connection, and can greatly reduce the line investment. In general, the PTJ tower has a simple structure, occupies a small area of ​​land resources and line corridors, has good safety and stability performance, and has low engineering investment, and has good promotion and application value.

[0021] Preferably, a newly constructed line ground wire cross arm 2 is provided between the original line ground wire cross arm 1 and the B loop upper phase conductor cross arm 3, and the newly constructed line ground wire cross arm 2 and the original line ground wire cross arm 1 provide lightning protection for the A double loop line conductor and the B double loop line conductor respectively. In this way, independent lightning protection can be provided for the π-connected line and the non-π-connected line, improving the safety and stability of the loop. At the same time, the arrangement of the double ground wire cross arm can meet the original line communication optical cable to maintain the original structure and routing plan.

[0022] The present invention is described in detail above through specific and preferred embodiments, but those skilled in the art should understand that the present invention is not limited to the embodiments described above, and any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel PTJ tower for π-connection at the far end of a double-circuit line on the same tower, comprising a tower body (15), wherein a ground wire cross arm (1) of an original line is provided at the top of the tower body (15), and a B-circuit upper phase conductor cross arm (3), a B-circuit middle phase conductor cross arm (4) and a B-circuit lower phase conductor cross arm (5) are provided in sequence below the ground wire cross arm (1), characterized in that: The B-loop upper phase conductor cross arm (3), the B-loop middle phase conductor cross arm (4) and the B-loop lower phase conductor cross arm (5) are connected to the B-loop phase sequence conductor B1 (9), the B-loop phase sequence conductor B2 (10) and the B-loop phase sequence conductor B3 (11) through hanging points respectively; the A-loop upper phase conductor cross arm (6), the A-loop middle phase conductor cross arm (7) and the A-loop lower phase conductor cross arm (8) are arranged in sequence below the B-loop lower phase conductor cross arm (5); the A-loop upper phase conductor cross arm (6), the A-loop middle phase conductor cross arm (7) and the A-loop lower phase conductor cross arm (8) are connected to the A-loop phase sequence conductor A1 (12), the A-loop phase sequence conductor A2 (13) and the A-loop phase sequence conductor A3 (14) respectively.

2. According to claim 1, a new type of PTJ tower for remote side π connection of double-circuit lines on the same tower, characterized in that: The B-loop phase-sequence conductor B1 (9), B-loop phase-sequence conductor B2 (10) and B-loop phase-sequence conductor B3 (11) and the A-loop phase-sequence conductor A1 (12), A-loop phase-sequence conductor A2 (13) and A-loop phase-sequence conductor A3 (14) are all double-loop line conductors.

3. According to claim 2, a new type of PTJ tower for remote side π connection of double-circuit lines on the same tower, characterized in that: A newly constructed line ground wire cross arm (2) is also provided between the original line ground wire cross arm (1) and the B-circuit upper phase conductor cross arm (3), and the original line ground wire cross arm (1) and the newly constructed line ground wire cross arm (2) respectively provide lightning protection for the B double-circuit line conductor and the A double-circuit line conductor.

4. According to claim 1, a new PTJ tower for remote side π connection of double-circuit lines on the same tower is characterized by: The A-loop upper phase conductor cross arm (6), the A-loop middle phase conductor cross arm (7) and the A-loop lower phase conductor cross arm (8) are arranged in a T-shape.

Images