Single-circuit 500kV line strain tower capable of realizing jump connection and change connection and giving consideration to phase sequence adjustment
By designing a single 500kV line resistance including the first iron tower and the second iron tower, the tower with horizontal and stringing can be used to realize the jump and phase adjustment between the line I and the line II. It is difficult to achieve the problem of efficient economic jump connection and phase -sequential adjustment, providing a flexible tower setting plan.
Patent Information
- Application Number
- CN202323525298.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2033-12-25
AI Technical Summary
When the 500kV single-return line is close to the distance or the local area is parallel, it is difficult for the existing technology to achieve cost-effective and efficient jump connections, while taking into account phase sequence adjustments.
Design a single -back 500kV line resistance that includes the first iron tower and the second iron tower. By setting up horizontal and tensile string on the inside of the tower, the jumping between line I and line II can be achieved. Phase sequence adjustment.
The economy and efficient jumping connection in the tense line corridor, at the same time take care of the phase -sequential adjustment, provide a flexible tower setting plan, which can temporarily jump and restore the original line when needed.
Smart Images
Figure CN222414289U_ABST
Abstract
Description
Technical Field
[0001] The utility model patent relates to a single-circuit 500kV line tension tower which can realize jump-through reconnection and take phase sequence adjustment into consideration. Background Art
[0002] In recent years, the main grid of power grids in various regions has been gradually built, improved and formed. In most areas, the main grid voltage level is 500kV line. With the further increase of power construction, the extension of the main grid and the outward pulling of the grid, the grid needs to be optimized according to the requirements of the power system. Among them, the jump connection of two 500kV single-circuit lines to form a new line has become the main means of grid optimization. Therefore, how to realize the jump connection of two lines in an economical, efficient and simple way while taking into account the phase sequence adjustment requirements has become an urgent problem to be solved.
[0003] When two 500kV single-circuit lines are far apart, a new jumper line can be built as usual to jumper the two lines. If there is a need for phase sequence adjustment, a conventional single-circuit phase-changing tower can be used according to the actual phase sequence requirements, which can generally achieve the phase sequence consistency adjustment connection requirements.
[0004] However, when two 500kV single-circuit lines are close to each other or are locally parallel or originate from one station, and at the same time are subject to the planning department's requirement that the path corridor is relatively tight, the existing technology does not have a single-circuit tension tower that can achieve phase sequence adjustment and simple and efficient tripping. Utility Model Content
[0005] The technical problem to be solved by the utility model is: in view of the situation that two 500kV single-circuit lines are close to each other or are parallel in some sections or are connected from one station, how to realize the jump connection of the two lines in an economical, efficient and simple manner while taking into account the phase sequence adjustment requirements. Therefore, a single-circuit 500kV line tension tower that can realize jump connection and take into account the phase sequence adjustment is provided.
[0006] In order to achieve the above object, the utility model is realized by the following technical solutions:
[0007] A single-circuit 500kV line tension tower that realizes jump-through reconnection and phase sequence adjustment, comprising a first iron tower and a second iron tower, wherein the front side of the first iron tower is connected to the line I, and the rear side of the first iron tower is anchored with the three-phase conductor of the original line; the front side of the second iron tower is connected to the line II, and the rear side of the second iron tower is anchored with the three-phase conductor of the original line;
[0008] A first upper cross arm, a first middle cross arm and a first lower cross arm are sequentially arranged on the inner side of the first iron tower from top to bottom, a first outer cross arm is arranged on the outer side of the first iron tower, and a first front cross arm and a first front tension string are arranged on the front side of the first iron tower; and the height of the first front tension string is located between the first upper cross arm and the first middle cross arm, and the height of the first front cross arm is located between the first middle cross arm and the first lower cross arm;
[0009] A second upper cross arm, a second middle cross arm and a second lower cross arm are sequentially arranged on the inner side of the second iron tower from top to bottom, a second outer cross arm is arranged on the outer side of the second iron tower, and a second front cross arm and a second front tension string are arranged on the front side of the second iron tower; and the height of the second front tension string is located between the second middle cross arm and the second lower cross arm, and the height of the second front cross arm is located between the second upper cross arm and the second middle cross arm;
[0010] The B-phase incoming line of line I is connected to the first outer crossarm through the first tension string, and then connected to the first lower crossarm through the first jumper string under the first front crossarm, and then jumped to the second lower crossarm of the second tower, and finally jumped to the second front tension string through the second jumper string under the second lower crossarm, and connected to the B-phase outgoing line of line II by the second front tension string;
[0011] The A-phase incoming line of line I is connected to the first front side tension string, connected to the first upper crossarm through the third jumper string, then jumped to the second upper crossarm of the second iron tower, and then jumped to the second outer crossarm through the fourth jumper string under the second front side crossarm, and finally connected to the A-phase outgoing line of line II through the tension string on the second outer crossarm;
[0012] The C-phase incoming line of line I is connected to the first middle-layer crossarm through the tension string, then jumps to the second middle-layer crossarm of the second tower, and finally connected to the C-phase outgoing line of line II by the tension string on the second middle-layer crossarm.
[0013] A first ground wire support is arranged on the top of the first iron tower, a second ground wire support is arranged on the top of the second iron tower, and a ground wire is connected between the first ground wire support and the second ground wire support.
[0014] Compared with the prior art, the utility model has the following beneficial effects: the rear side of the new tower can be used to anchor the original line, and when the original line is not temporarily dismantled in areas with tight line corridors, the rear section of the original line can be anchored and retained, or a temporary jump can be performed in this period, and the jump can be removed as needed in the long term, and the new tower can be erected with jumpers on the front and rear sides to restore the function of the original line. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is the principle diagram of the utility model. DETAILED DESCRIPTION
[0016] 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 of the embodiments of the present utility model, rather than all the embodiments. 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.
[0017] 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. It 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.
[0018] The specific situation targeted by the present utility model is as follows: When the distance between two adjacent 500 kV single-circuit lines to be jumped through is relatively close (generally 200 - 300 m) or the local sections are parallel, the phase sequence adjustment jump-through strain tower in the present utility model can be used.
[0019] Currently, the common phase conductor arrangements of single-circuit 500 kV lines include the "wine glass" horizontal arrangement for straight towers, the "dry character type" equilateral triangle arrangement for strain towers, the "inverted triangle" arrangement for compact lines, and the "equilateral triangle arrangement" for cathead towers, etc.
[0020] Up jump-through schematic Figure 1 In the figure, Line I and Line II are two adjacent parallel lines. The original line of Line I is a three-phase horizontal arrangement of a straight "wine glass tower" and a three-phase equilateral triangle arrangement of a strain tower in the "dry character type". Line II is a three-phase conductor "inverted triangle" arrangement of a compact line. The present utility model needs to jump through these two lines and at the same time needs to take into account the consistent connection of phase sequence adjustment.
[0021] As Figure 1 shown, a single-circuit 500 kV line strain tower that can achieve jump-through connection and can take into account phase sequence adjustment includes a first iron tower 1 and a second iron tower 2. The front side of the first iron tower 1 is connected to Line I, and the three-phase conductors of the original line are anchored at the rear side of the first iron tower 1; the front side of the second iron tower 2 is connected to Line II, and the three-phase conductors of the original line are anchored at the rear side of the second iron tower 2.
[0022] A first upper crossarm 11, a first middle crossarm 12 and a first lower crossarm 13 are arranged in sequence from top to bottom on the inner side of the first iron tower 1, a first outer crossarm 17 is arranged on the outer side of the first iron tower 1, and a first front crossarm 16 and a first front tension string 15 are arranged on the front side of the first iron tower 1; and the height of the first front tension string 15 is located between the first upper crossarm 11 and the first middle crossarm 12, and the height of the first front crossarm 16 is located between the first middle crossarm 12 and the first lower crossarm 13.
[0023] A second upper crossarm 21, a second middle crossarm 22 and a second lower crossarm 23 are arranged in sequence from top to bottom on the inner side of the second iron tower 2, a second outer crossarm 27 is arranged on the outer side of the second iron tower 2, and a second front crossarm 26 and a second front tension string 25 are arranged on the front side of the second iron tower 2; and the height of the second front tension string 25 is located between the second middle crossarm 22 and the second lower crossarm 23, and the height of the second front crossarm 26 is located between the second upper crossarm 21 and the second middle crossarm 22.
[0024] The B-phase incoming line of line I is connected to the first outer crossarm 17 through the first tension string 31, then connected to the first lower crossarm 13 through the first jumper string 32 under the first front crossarm 16, and then jumped to the second lower crossarm 23 of the second tower 2, and finally jumped to the second front tension string 25 through the second jumper string 33 under the second lower crossarm 23, and the second front tension string 25 is connected to the B-phase outgoing line of line II.
[0025] The A-phase incoming line of line I is connected to the first front side tension string 15, connected to the first upper crossarm 11 through the third jumper string 34, and then jumps to the second upper crossarm 21 of the second tower, and then jumps to the second outer crossarm 27 through the fourth jumper string 35 under the second front side crossarm 26, and finally connected to the A-phase outgoing line of line II by the tension string on the second outer crossarm 27.
[0026] The C-phase incoming line of line I is connected to the first middle-layer crossarm 12 through the tension string, then jumps to the second middle-layer crossarm 22 of the second tower 2, and finally connected to the C-phase outgoing line of line II by the tension string on the second middle-layer crossarm 22.
[0027] In this jumper, for the first tower 1, the B-phase incoming line, the A-phase incoming line and the C-phase incoming line form a triangle, with the A-phase incoming line at the top; and for the second tower 2, the C-phase outgoing line, the B-phase outgoing line and the A-phase outgoing line form an inverted triangle, with the B-phase outgoing line at the bottom.
[0028] In addition, a first ground wire support 14 is disposed on the top of the first iron tower 1 , and a second ground wire support 24 is disposed on the top of the second iron tower 2 . A ground wire 36 is connected between the first ground wire support 14 and the second ground wire support 24 .
[0029] The principle adopted by this utility model is:
[0030] The three-phase arrangement of the original line was changed. A new type of tower was used to transform the horizontal arrangement of line I into an upper, middle and lower vertical arrangement of the cross-arm outlet lines. The "inverted triangle" arrangement of line II was also transformed into an upper, middle and lower vertical arrangement of the cross-arm outlet lines. Then, interconnections were made between the newly built cross-arm outlets.
[0031] New tower type and jump pass Figure 1 The noted phase sequence is only for adjustment purposes. When adjusting the actual phase sequence, the position of the jumper crossarm added to the new tower can be changed according to the needs for design.
[0032] The rear side of the new tower can be used to anchor the original line. In areas with tight line corridors, when the original line is not temporarily dismantled, the rear section of the original line can be anchored and retained, or a temporary jump can be made in this period. The jump can be removed as needed in the long term, and jumpers can be installed on the front and rear sides of the new tower to restore the function of the original line.
[0033] In addition to being used as a phase sequence adjustment jump-through tension tower, the new tower can also be used as a reconnection or T-connection tower as required.
[0034] The above is only a preferred embodiment of the present invention. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be regarded as the protection scope of the present invention.
Claims
1. A single-circuit 500 kV line tension tower that can realize jump-through reconnection and phase sequence adjustment, comprising a first iron tower (1) and a second iron tower (2), wherein the front side of the first iron tower (1) is connected to a line I, and the rear side of the first iron tower (1) is anchored with a three-phase conductor of the original line; the front side of the second iron tower (2) is connected to a line II, and the rear side of the second iron tower (2) is anchored with a three-phase conductor of the original line; A first upper cross arm (11), a first middle cross arm (12) and a first lower cross arm (13) are sequentially arranged on the inner side of the first iron tower (1) from top to bottom, a first outer cross arm (17) is arranged on the outer side of the first iron tower (1), and a first front cross arm (16) and a first front tension string (15) are arranged on the front side of the first iron tower (1); the height of the first front tension string (15) is located between the first upper cross arm (11) and the first middle cross arm (12), and the height of the first front cross arm (16) is located between the first middle cross arm (12) and the first lower cross arm (13); A second upper cross arm (21), a second middle cross arm (22) and a second lower cross arm (23) are sequentially arranged on the inner side of the second iron tower (2) from top to bottom, a second outer cross arm (27) is arranged on the outer side of the second iron tower (2), and a second front cross arm (26) and a second front tension string (25) are arranged on the front side of the second iron tower (2); the height of the second front tension string (25) is located between the second middle cross arm (22) and the second lower cross arm (23), and the height of the second front cross arm (26) is located between the second upper cross arm (21) and the second middle cross arm (22); The B-phase incoming line of line I is connected to the first outer crossarm (17) through the first tension string (31), then connected to the first lower crossarm (13) through the first jumper string (32) below the first front crossarm (16), then jumped to the second lower crossarm (23) of the second iron tower (2), and finally jumped to the second front tension string (25) through the second jumper string (33) below the second lower crossarm (23), and connected to the B-phase outgoing line of line II through the second front tension string (25); The A-phase incoming line of line I is connected to the first front side tension string (15), connected to the first upper cross arm (11) through the third jumper string (34), then jumped to the second upper cross arm (21) of the second iron tower, and then jumped to the second outer cross arm (27) through the fourth jumper string (35) below the second front side cross arm (26), and finally connected to the A-phase outgoing line of line II through the tension string on the second outer cross arm (27); The C-phase incoming line of line I is connected to the first middle-layer crossarm (12) through the tension string, then jumps to the second middle-layer crossarm (22) of the second iron tower (2), and finally connected to the C-phase outgoing line of line II by the tension string on the second middle-layer crossarm (22).
2. The single-circuit 500kV line tension tower for realizing jump-through reconnection and taking phase sequence adjustment into consideration according to claim 1 is characterized in that: A first ground wire support (14) is arranged on the top of the first iron tower (1), a second ground wire support (24) is arranged on the top of the second iron tower (2), and a ground wire (36) is connected between the first ground wire support (14) and the second ground wire support (24).