Permanent and temporary combined connecting structure for short circuit of different loops of 750kV power transmission line

Abstract

The utility model relates to a permanent-temporary combined connecting structure for short circuit of different loops of a 750kV power transmission line. A substation A is connected to a substation B sequentially through a double-loop branch tower, a vertical drainage plate of a first single-loop vertical arrangement tower and a first common single-loop strain tower; the substation A is connected to a power plant C through a double-loop branch tower, a vertical drainage plate of a second single-loop vertical arrangement tower and a second common single-loop strain tower in sequence; a line is led out from an inclined drainage plate on the transformer substation side of the first single-loop vertical arrangement tower A and is connected to an inclined drainage plate on the transformer substation side of the second single-loop vertical arrangement tower A through a single-loop vertical jumper tower, a jumper wire of the double-loop branch tower is released, and a power plant C supplies power to a transformer substation B; and the jumper of the double-loop branch tower is recovered, and a wire passing through the single-loop vertical jumper tower between the first single-loop vertical arrangement tower and the second single-loop vertical arrangement tower is unfastened at the inclined drainage plate. The utility model has the characteristics of safe operation, convenient operation during the reverse connection of the permanent temporary scheme, short line power-off time and the like.

Description

Technical Field

[0001] The utility model relates to a permanent and temporary combined connection structure for short - circuiting different circuits of a 750kV transmission line. Background Art

[0002] For a 750kV line from Substation A to Substation B in a certain project construction, one section of the double - circuit divergence tower at Substation A uses double - circuit double - side overhead line construction. One circuit goes to Substation B and the other goes to Power Plant C; both the section from the double - circuit divergence tower 1 to Substation B and the section from the double - circuit divergence tower 1 to Power Plant C use single - circuit construction. According to the actual situation, the construction sequence of Substation A is later than that of Power Plant C. According to the regulations of the power system: the outgoing line of Power Plant C needs to be temporarily connected to Substation B, and after Substation A is completed, Power Plant C is then re - connected to Substation A. Therefore, how to simply, safely and conveniently achieve the jump - through connection of two lines while taking into account the phase - sequence requirements, and at the same time consider the combination of temporary short - circuiting and permanent solutions has become an urgent problem to be solved. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is: how to solve the problem of the combination of temporary short - circuiting and permanent solutions in the background art, and provide a permanent and temporary combined connection structure for short - circuiting different circuits of a 750kV transmission line.

[0004] The technical solution of the utility model is specifically as follows:

[0005] A permanent and temporary combined connection structure for short - circuiting different circuits of a 750kV transmission line, with Substation A on one side and Substation B and Power Plant C on the other side. A double - circuit divergence tower is arranged on the side of Substation A. A first single - circuit vertically - arranged tower and a second single - circuit vertically - arranged tower are set up on the side of the double - circuit divergence tower far from Substation A. A first ordinary single - circuit tension tower and a second ordinary single - circuit tension tower are respectively set up in the directions towards Substation B and Power Plant C; and a single - circuit vertical jumper tower is arranged between the first single - circuit vertically - arranged tower and the second single - circuit vertically - arranged tower.

[0006] Multi - terminal drainage - plate strain clamps are arranged in the strain strings on the side of Substation A of the first single - circuit vertically - arranged tower and the second single - circuit vertically - arranged tower. The multi - terminal drainage - plate strain clamps include vertical drainage plates and inclined drainage plates.

[0007] Substation A is connected to Substation B successively through a double-circuit branching tower, the vertical drainage plate of the first single-circuit vertical arrangement tower, and the first ordinary single-circuit tension tower; and Substation A is connected to Power Plant C successively through a double-circuit branching tower, the vertical drainage plate of the second single-circuit vertical arrangement tower, and the second ordinary single-circuit tension tower; the line is led out from the inclined drainage plate on the side of Substation A of the first single-circuit vertical arrangement tower, passes through a single-circuit vertical jumper tower, and is connected to the inclined drainage plate on the side of Substation A of the second single-circuit vertical arrangement tower. At the same time, the jumper of the double-circuit branching tower is disconnected to achieve temporary short-circuiting, and Power Plant C supplies power to Substation B; after the temporary power supply is completed, the jumper of the double-circuit branching tower is restored, and at the same time, the wire passing through the single-circuit vertical jumper tower between the first single-circuit vertical arrangement tower and the second single-circuit vertical arrangement tower is disconnected at the inclined drainage plate to achieve permanent system access.

[0008] The multi-terminal drainage plate tension clamp includes a clamp body, the clamp body is a ring-shaped clamp, a steel anchor is connected inside the clamp body, the clamp body is connected with at least two drainage plates, and each drainage plate is connected with a jumper clamp, and the jumper clamp is fixed on the drainage plate through at least one bolt.

[0009] Two drainage plates are connected to the tail of the clamp body, namely a vertical drainage plate and an inclined drainage plate.

[0010] The beneficial effects of the present utility model are as follows: It has the following advantages: This connection method has the characteristics of simple structure, safe operation, convenient operation during the permanent-temporary scheme switching, short line power outage time, etc., and has good economic and social benefits. Description of the Drawings

[0011] Figure 1 It is a structural diagram of the prior art;

[0012] Figure 2 It is the overall structural diagram of the present utility model;

[0013] Figure 3 It is a relative relationship diagram of the single-circuit vertical jumper tower 6 with the first single-circuit vertical arrangement tower 2 and the second single-circuit vertical arrangement tower 4;

[0014] Figure 4 It is the front view of the multi-terminal drainage plate tension clamp;

[0015] Figure 5 It is the side view of the multi-terminal drainage plate tension clamp;

[0016] Figure 6 It is the front view of the multi-terminal drainage plate;

[0017] Figure 7 It is the jumper connection diagram between the first single-circuit vertical arrangement tower 2 and the second single-circuit vertical arrangement tower 4. Detailed Implementation Modes

[0018] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part rather than all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0019] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0020] As Figure 2 — Figure 3 shown, a permanent-temporary combined connection structure for short-circuiting different circuits of a 750 kV transmission line. Substation A is located on one side, and Substation B and Power Plant C are located on the other side. A double-circuit branching tower 1 is provided on the side of Substation A.

[0021] A first single-circuit vertically arranged tower 2 and a second single-circuit vertically arranged tower 4 are established on the side of the double-circuit branching tower 1 far from Substation A, and a first ordinary single-circuit tension tower 3 and a second ordinary single-circuit tension tower 5 are respectively established in the directions towards Substation B and Power Plant C; and a single-circuit vertical jumper tower 6 is provided between the first single-circuit vertically arranged tower 2 and the second single-circuit vertically arranged tower 4.

[0022] Multi-terminal drainage plate strain clamps 7 are provided in the strain strings on the side of Substation A of the first single-circuit vertically arranged tower 2 and the second single-circuit vertically arranged tower 4. The multi-terminal drainage plate strain clamps 7 include a vertical drainage plate 76 and an inclined drainage plate 77.

[0023] The multi-terminal drainage plate strain clamp 7 includes a clamp body 72. The clamp body 72 is an annular clamp. A steel anchor 71 is connected inside the clamp body 72. The clamp body 72 is connected with at least two drainage plates 73. Each drainage plate 73 is connected with a jumper clamp 74. The jumper clamp 74 is fixed on the drainage plate 73 by at least one bolt 75.

[0024] Further, two drainage plates 73 are connected to the tail of the clamp body 72, namely a vertical drainage plate 76 and an inclined drainage plate 77. In this way, the drainage plate 73 is arranged in a double-end type. Among them, the vertical drainage plate 76 is connected to the lines on the front and back sides of the tension tower, and the inclined drainage plate 77 is connected to the "T"-connected line or different short-circuited circuits. As Figure 2 shown, when performing a "T"-connection of the line, connect the "T"-connected line to the inclined drainage plate 77 of the strain clamp through the jumper clamp 74, that is, the "T"-connection of the line is realized; when short-circuiting different circuit lines, connect the conductor of another circuit line to the inclined drainage plate 77 of the strain clamp through the jumper clamp 74, and at the same time disconnect the jumpers on the front and back sides of the vertical drainage plate 76 of the tension tower, then the short-circuit between different lines can be realized.

[0025] Further, the included angle α between the axis of the inclined drainage plate 77 and the axis of the drainage plate 73 is 10° - 40°.

[0026] Further, the inclination angle β value between the axis of the inclined drainage plate 77 and the axis of the vertical drainage plate 76 can be set according to the actual engineering situation. Generally speaking, the range of the inclination angle β is 5° - 90°.

[0027] As Figure 7 shown, Substation A is connected to Substation B through the double-circuit branching tower 1, the vertical drainage plate 76 of the first single-circuit vertical arrangement tower 2, and the first ordinary single-circuit tension tower 3 in sequence; and Substation A is connected to Power Plant C through the double-circuit branching tower 1, the vertical drainage plate 76 of the second single-circuit vertical arrangement tower 4, and the second ordinary single-circuit tension tower 5 in sequence. The line is led out from the inclined drainage plate 77 on the side of Substation A of the first single-circuit vertical arrangement tower 2, passes through the single-circuit vertical jumper tower 6, and is connected to the inclined drainage plate 77 on the side of Substation A of the second single-circuit vertical arrangement tower 4. At the same time, disconnect the jumper of the double-circuit branching tower 1, then the temporary short-circuit is realized, and Power Plant C supplies power to Substation B. After the temporary power transmission plan is completed, only need to restore the jumper of the double-circuit branching tower 1, and at the same time disconnect the conductor passing through the single-circuit vertical jumper tower 6 between the first single-circuit vertical arrangement tower 2 and the second single-circuit vertical arrangement tower 4 at the inclined drainage plate 77, then the permanent system access plan can be realized.

[0028] This connection method has the characteristics of simple structure, safe operation, convenient operation during the permanent-temporary plan inversion, short line power outage time, etc., and has good economic and social benefits.

[0029] The above are only the preferred embodiments of the present invention. It should be noted that for those skilled in the art, without departing from the overall concept of the present invention, several changes and improvements can still be made, and these should also be regarded as the protection scope of the present invention.

Claims

1. A permanent-temporary combined connection structure for short-circuiting different circuits of a 750 kV transmission line. Substation A is located on one side, and Substation B and Power Plant C are located on the other side. A double-circuit branching tower (1) is provided on the side of Substation A, characterized in that: On the side of the double-circuit branching tower (1) away from Substation A, there is a first single-circuit vertically arranged tower (2) and a second single-circuit vertically arranged tower (4). A first ordinary single-circuit tension tower (3) and a second ordinary single-circuit tension tower (5) are respectively set up in the directions towards Substation B and Power Plant C. And a single-circuit vertical jumper tower (6) is arranged between the first single-circuit vertically arranged tower (2) and the second single-circuit vertically arranged tower (4). Multi-terminal drainage plate strain clamps (7) are arranged in the strain strings on the side of Substation A of the first single-circuit vertically arranged tower (2) and the second single-circuit vertically arranged tower (4). The multi-terminal drainage plate strain clamps (7) include a vertical drainage plate (76) and an inclined drainage plate (77). Substation A is connected to Substation B through the double-circuit branching tower (1), the vertical drainage plate (76) of the first single-circuit vertically arranged tower (2), and the first ordinary single-circuit tension tower (3) in sequence. And Substation A is connected to Power Plant C through the double-circuit branching tower (1), the vertical drainage plate (76) of the second single-circuit vertically arranged tower (4), and the second ordinary single-circuit tension tower (5) in sequence. The line is led out from the inclined drainage plate (77) on the side of Substation A of the first single-circuit vertically arranged tower (2), passes through the single-circuit vertical jumper tower (6), and is connected to the inclined drainage plate (77) on the side of Substation A of the second single-circuit vertically arranged tower (4). At the same time, the jumper of the double-circuit branching tower (1) is disconnected to achieve temporary short-circuiting, and Power Plant C supplies power to Substation B. After the temporary power supply ends, the jumper of the double-circuit branching tower (1) is restored. At the same time, the wire passing through the single-circuit vertical jumper tower (6) between the first single-circuit vertically arranged tower (2) and the second single-circuit vertically arranged tower (4) is disconnected at the inclined drainage plate (77) to achieve permanent system access.

2. The permanent-temporary combined connection structure for short-circuiting different circuits of a 750 kV transmission line according to claim 1, wherein: The multi-terminal drainage plate strain clamp (7) includes a clamp body (72). The clamp body (72) is a ring-shaped clamp. A steel anchor (71) is connected inside the clamp body (72). The clamp body (72) is connected with at least two drainage plates (73). Each drainage plate (73) is connected with a jumper clamp (74). The jumper clamp (74) is fixed on the drainage plate (73) through at least one bolt (75).

3. A permanent-temporary combined connection structure for short-circuiting different circuits of a 750 kV transmission line according to claim 1, characterized in that: Two drainage plates (73), namely a vertical drainage plate (76) and an inclined drainage plate (77), are connected to the tail of the clamp body (72).

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