Multi-directional outgoing line framework of high-altitude 330kV substation

Abstract

A multi-directional outgoing line framework of a high-altitude 330kV substation relates to the technical field of substation, which increases the outgoing line loop, facilitates flexible adjustment of outgoing line direction, further compresses space, reduces overall height under the condition of ensuring electrical distance, improves operation safety and stability, saves materials, and achieves better economy.

Description

Technical Field

[0001] This utility model relates to the field of substation technology, and more specifically, to a multi-directional outgoing line structure for a 330kV substation at high altitude. Background Technology

[0002] Existing 750kV and 330kV substations primarily utilize 330kV HGIS equipment, with a predominantly C-type layout. Current technology, due to the large number of outgoing lines in substations (single-layer, double-layer, side-outgoing, etc.), cannot meet the electrical distance requirements between outgoing lines in multi-layer layouts, often necessitating an increase in the overall height of the substation. However, in high-altitude, windy environments, the higher the substation, the greater its susceptibility to strong winds, resulting in decreased stability. Furthermore, this also increases material usage, leading to poor economic efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a multi-directional outgoing line structure for a 330kV substation at high altitude. Its structure is novel and easy to operate. While ensuring multiple outgoing lines, it determines the hanging points of each outgoing line, reduces the height of the structure, and improves the safety and economy of the substation.

[0004] The embodiments of this utility model are implemented as follows: A multi-directional outgoing line frame for a high-altitude 330kV substation, the multi-directional outgoing line frame includes multiple frames of columns spaced apart along a first direction, each frame of columns consisting of a first frame column and a second frame column spaced apart along a second direction, the first direction and the second direction being perpendicular; The multi-directional outgoing line structure also includes busbar hanging beams from low to high, lower-level outgoing line hanging beams, reverse-outgoing line hanging beams, upper-level outgoing line hanging beams, and side-outgoing line hanging beams; the lower-level outgoing line hanging beams and upper-level outgoing line hanging beams are arranged along the first direction and connect two adjacent first frame columns; the reverse-outgoing line hanging beams are arranged along the first direction and connect two adjacent second frame columns; the busbar hanging beams and side-outgoing line hanging beams are arranged along the second direction and connect the first and second frame columns in the same frame column pair; The multi-directional outgoing line structure also includes inlet and outlet bushings. The first hanging line passes through the first inlet and outlet bushing and the hanging point on the lower outgoing line hanging beam in sequence to form the first outgoing line circuit. The second hanging line passes through the second inlet and outlet bushing, the hanging point on the reverse hanging beam and the hanging point on the upper outgoing line hanging beam in sequence to form the second outgoing line circuit. The third hanging line branches off from the second hanging line, passes through the hanging point on the side outgoing line hanging beam, and forms the third outgoing line circuit.

[0005] Furthermore, in other preferred embodiments of this utility model, there are two inlet and outlet sleeves, namely a first inlet and outlet sleeve and a second inlet and outlet sleeve. The first inlet and outlet sleeve is located at the bottom of the first frame column, and the first hanging wire is led out from the first inlet and outlet sleeve; the second inlet and outlet sleeve is located at the bottom of the second frame column, and the second hanging wire is led out from the second inlet and outlet sleeve.

[0006] Furthermore, in other preferred embodiments of this utility model, the second hanging line includes an intermediate section located between the reverse hanging line beam and the upper outgoing hanging line beam, and the third hanging line includes a main line spanning two adjacent side outgoing hanging line beams and a branch line for connecting with the intermediate section.

[0007] Furthermore, in other preferred embodiments of this utility model, both the second and third hanging wires include three phase wires, and the corresponding phase wires of the third hanging wire and the second hanging wire are connected by a branch wire.

[0008] Furthermore, in other preferred embodiments of this utility model, the third hanging line is disposed close to the second frame column.

[0009] Furthermore, in other preferred embodiments of this utility model, the height of the busbar hanging beam is 19.5±0.5m; the height of the lower outgoing hanging beam is 23±0.5m; the height of the reverse outgoing hanging beam is 26.5±0.5m; the height of the upper outgoing hanging beam is 35.5±0.5m; and the height of the side outgoing hanging beam is 37±0.5m.

[0010] Furthermore, in other preferred embodiments of this utility model, a grounding wire hanging point is provided at the top of the first frame column, and the height of the grounding wire hanging point is 52±0.5m.

[0011] Furthermore, in other preferred embodiments of this utility model, a lightning rod is provided at the top of the second frame column, and the height of the lightning rod is 53±0.5m.

[0012] Furthermore, in other preferred embodiments of this utility model, multiple busbars are suspended below the busbar hanging beam, the busbars are arranged along a first direction, and the multiple busbars are spaced apart along a second direction; the height of the busbars is 15.5±0.5m.

[0013] Furthermore, in other preferred embodiments of this utility model, it also includes two edge circuit breakers and one intermediate circuit breaker. The two edge circuit breakers are respectively located on the inner side of the first incoming and outgoing bushing and the second incoming and outgoing bushing, and the intermediate circuit breaker is set near the edge circuit breaker on one side.

[0014] The beneficial effects of this utility model embodiment are: This utility model embodiment provides a multi-directional outgoing line structure for a 330kV substation at high altitude. By rationally setting the hanging points and line routing, it not only increases the number of outgoing line circuits and facilitates flexible adjustment of the outgoing line direction, but also further compresses space. While ensuring electrical clearance, it reduces the overall height, thereby improving operational safety and stability, saving materials, and achieving better economic efficiency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A cross-sectional view of a multi-directional outgoing line structure of a high-altitude 330kV substation provided in an embodiment of this utility model, viewed from the first direction. Figure 2 This is a cross-sectional view of a multi-directional outgoing line structure of a high-altitude 330kV substation provided in an embodiment of the present invention, viewed from the second direction.

[0017] Icons: 100 - Multi-directional outgoing line frame; 110 - First frame column; 111 - Ground wire hanging point; 120 - Second frame column; 121 - Lightning rod; 130 - Busbar hanging beam; 131 - Busbar; 140 - Lower-level outgoing line hanging beam; 141 - First hanging line; 150 - Reverse hanging beam; 160 - Upper-level outgoing line hanging beam; 161 - Second hanging line; 1611 - Intermediate section; 170 - Side outgoing line hanging beam; 171 - Third hanging line; 1711 - Branch line; 180 - Incoming and outgoing line bushing; 181 - First incoming and outgoing line bushing; 182 - Second incoming and outgoing line bushing; 191 - Edge circuit breaker; 192 - Intermediate circuit breaker. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Example

[0023] This embodiment provides a multi-directional outgoing line structure 100 for a high-altitude 330kV substation, referring to... Figure 1 and Figure 2 As shown, the multi-directional outgoing frame 100 includes a plurality of frame column pairs spaced apart along a first direction. Each frame column pair consists of a first frame column 110 and a second frame column 120 spaced apart along a second direction. The first direction and the second direction are perpendicular.

[0024] like Figure 1 and Figure 2 As shown, the multi-directional outgoing line frame 100 also includes a busbar hanging beam 130, a lower-level outgoing line hanging beam 140, a reverse-outgoing line hanging beam, an upper-level outgoing line hanging beam 160, and a side-outgoing line hanging beam 170, arranged from low to high. The lower-level outgoing line hanging beam 140 and the upper-level outgoing line hanging beam 160 are arranged along a first direction and connect two adjacent first frame columns 110. The reverse-outgoing line hanging beam is arranged along the first direction and connects two adjacent second frame columns 120. The busbar hanging beam 130 and the side-outgoing line hanging beam 170 are arranged along a second direction and connect the first frame column 110 and the second frame column 120 in the same frame column pair.

[0025] The multi-directional cable outlet structure 100 also includes inlet and outlet sleeves 180. The first hanging wire 141 passes sequentially through the first inlet and outlet sleeve 181 and the hanging point on the lower outlet hanging beam 140 before being led out to form the first outlet circuit. The second hanging wire 161 passes sequentially through the second inlet and outlet sleeve 182, the hanging point on the reverse hanging beam 150, and the hanging point on the upper outlet hanging beam 160 before being led out to form the second outlet circuit. The third hanging wire 171 branches off from the second hanging wire 161, passes through the hanging point on the side outlet hanging beam 170, and is led out to form the third outlet circuit. This multi-directional cable outlet structure 100 can meet the double-layer cable outlet requirements of both upper and lower layers, and can also allow cable outlet from the end side, solving the problem of single-direction cable outlet and limited outlet circuits in the prior art.

[0026] Furthermore, such as Figure 1 and Figure 2As shown, there are two inlet / outlet bushings 180, namely a first inlet / outlet bushing 181 and a second inlet / outlet bushing 182. The first inlet / outlet bushing 181 is located at the bottom of the first frame column 110, and the first hanging wire 141 is led out from the first inlet / outlet bushing 181. The second inlet / outlet bushing 182 is located at the bottom of the second frame column 120, and the second hanging wire 161 is led out from the second inlet / outlet bushing 182. The first inlet / outlet bushing 181 can directly reach the lower-level outlet hanging beam 140 along the first frame column 110, and the second inlet / outlet bushing 182 can directly reach the reverse hanging beam 150 along the second frame column 120, resulting in a smoother outlet with no extra overhead wires.

[0027] The second hanging line 161 includes an intermediate section 1611 located between the reverse hanging line beam 150 and the upper outgoing hanging line beam 160. The third hanging line 171 includes a main line spanning two adjacent side outgoing hanging line beams 170 and a branch line 1711 for connecting to the intermediate section 1611. Current is transmitted from the second hanging line 161 to the third hanging line 171 through the branch line 1711, and then output.

[0028] Furthermore, both the second hanging line 161 and the third hanging line 171 include three phase wires, and the corresponding phase wires of the third hanging line 171 and the second hanging line 161 are connected through branch lines 1711. It should be noted that sufficient electrical distance must be maintained between the multiple branch lines 1711, typically not less than 3.75m.

[0029] The third hanging line 171 is set close to the second frame column 120, and multiple third hanging lines 171 are set close to one side of the second frame column 120 to leave sufficient distance from the second hanging line 161 below.

[0030] Furthermore, such as Figure 1 and Figure 2 As shown, the height of the busbar hanging beam 130 is 19.5±0.5m; while satisfying the B1 value (4100mm) between the A-phase lead of busbar 131 and the incoming / outgoing bushing 180, the height of the busbar hanging beam 130 is reduced as much as possible. Meanwhile, the lower outgoing hanging beam 140 is staggered with the busbar hanging beam 130, and the height of the lower outgoing hanging beam 140 is 23±0.5m.

[0031] Provided that the B1 value between the reverse outgoing jumper and the busbar 131 is met, the height of the reverse outgoing wire hanging beam 150 is set to 26.5±0.5m.

[0032] Considering the safety distance C value requirement for personnel on the lower-level outgoing line hanging beam (140 meters) and the requirements for the sag of the 330 kV jumper (including the equipotential ring), the minimum height of the upper-level outgoing line hanging frame of the 330 kV structure is: 23 + 5.95 + 5.5 = 34.55 m. Considering the construction error and necessary margin, the height of the upper-level outgoing line hanging frame of the 330 kV structure is 35.5 ± 0.5 m.

[0033] Considering the phase distance A2 between the side-outgoing line crossover and the reverse-outgoing line crossover, and considering the sag of the side-outgoing line, which is usually the smallest among the three phase lines, the height of the connection between the C-phase side-outgoing line crossover and the reverse-outgoing line crossover is approximately 30.05 meters. Considering the maximum sag of the side-outgoing line crossover is 3 meters and the phase distance A2 value of 3.75 meters for the 330kV distribution equipment, the hanging height of the side-outgoing line is: 30.05 + 3 + 3.75 = 36.8 meters. After considering a certain margin, the height of the side-outgoing line hanging beam 170 is 37 ± 0.5 meters.

[0034] Furthermore, such as Figure 1 and Figure 2 As shown, a grounding wire hanging point 111 is provided at the top of the first frame column 110, and the height of the grounding wire hanging point 111 is 52±0.5m. According to the grounding wire column height calculation method: h d =h-h0≥D / (4p), with a conductor height of 23m, the ground wire hanging height is 23+8m, and 31m is sufficient; with a conductor height of 35.5m, the ground wire hanging height is 35.5+9.5m, and 45m is sufficient; with a conductor height of 37m, the ground wire hanging height is 37+15m, and 52m is sufficient. Therefore, considering installation errors, the height of the ground wire hanging point 111 in this embodiment is 52±0.5m.

[0035] Furthermore, a lightning rod 121 is installed on the top of the second frame column 120. The height of the lightning rod 121 is slightly higher than the height of the outgoing ground wire suspension point 111, and the height of the lightning rod 121 is 53±0.5m.

[0036] Multiple busbars 131 are suspended below the busbar hanging beam 130. The busbars 131 are arranged along a first direction, and the multiple busbars 131 are spaced apart along a second direction. The height of the busbars 131 is 15.5±0.5m. While meeting the relevant requirements for high-altitude air gap correction, the hanging height of the busbars 131 is minimized, resulting in less wind deflection of the power distribution busbars 131 and safer operation.

[0037] Furthermore, such as Figure 1 and Figure 2As shown, the multi-directional outgoing line structure 100 also includes two edge circuit breakers 191 and one intermediate circuit breaker 192. The two edge circuit breakers 191 are located on the inner side of the first incoming / outgoing line bushing 181 and the second incoming / outgoing line bushing 182, respectively. The intermediate circuit breaker 192 is positioned closer to one of the edge circuit breakers 191. In the conventional configuration, the intermediate circuit breaker 192 is centrally located, requiring both busbars 131 to be de-energized during maintenance. However, by positioning the intermediate circuit breaker 192 closer to one of the edge circuit breakers 191, the operation of the busbar 131 on the other side can be ensured.

[0038] In summary, this utility model embodiment provides a multi-directional outgoing line structure 100 for a high-altitude 330kV substation. Through the rational arrangement of hanging points and line routing, it not only increases the number of outgoing line circuits and facilitates flexible adjustment of the outgoing line direction, but also further compresses space. While ensuring electrical distance, it reduces the overall height, thereby improving operational safety and stability, saving materials, and achieving better economic efficiency.

[0039] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-directional outgoing line structure for a high-altitude 330kV substation, characterized in that, The multi-directional outgoing frame includes multiple frames of columns spaced apart along a first direction. Each frame of columns consists of a first frame column and a second frame column spaced apart along a second direction. The first direction and the second direction are perpendicular. The multi-directional outgoing cable structure further includes, from low to high, busbar hanging beams, lower-level outgoing cable hanging beams, reverse-outgoing cable hanging beams, upper-level outgoing cable hanging beams, and side-outgoing cable hanging beams; the lower-level outgoing cable hanging beams and the upper-level outgoing cable hanging beams are arranged along the first direction and connect two adjacent first-frame columns; the reverse-outgoing cable hanging beams are arranged along the first direction and connect two adjacent second-frame columns; the busbar hanging beams and the side-outgoing cable hanging beams are arranged along the second direction and connect the first-frame column and the second-frame column in the same pair of frame columns; The multi-directional outgoing cable structure is also equipped with inlet and outlet cable sleeves. There are two inlet and outlet cable sleeves, namely the first inlet and outlet cable sleeve and the second inlet and outlet cable sleeve. The first hanging cable passes through the first inlet and outlet cable sleeve and the hanging point on the lower outgoing cable hanging beam in sequence to form the first outgoing cable loop. The second hanging cable passes through the second inlet and outlet cable sleeve, the hanging point on the reverse outgoing cable hanging beam and the hanging point on the upper outgoing cable hanging beam in sequence to form the second outgoing cable loop. The third hanging cable branches off from the second hanging cable, passes through the hanging point on the side outgoing cable hanging beam, and forms the third outgoing cable loop.

2. The multi-directional outgoing line structure of the high-altitude 330kV substation according to claim 1, characterized in that, The first inlet / outlet sleeve is installed at the bottom of the first frame column, and the first hanging line is led out from the first inlet / outlet sleeve; the second inlet / outlet sleeve is installed at the bottom of the second frame column, and the second hanging line is led out from the second inlet / outlet sleeve.

3. The multi-directional outgoing line structure of the high-altitude 330kV substation according to claim 2, characterized in that, The second hanging line includes a middle section located between the reverse outgoing hanging line beam and the upper outgoing hanging line beam, and the third hanging line includes a main line spanning two adjacent side outgoing hanging line beams and a branch line for connecting to the middle section.

4. The multi-directional outgoing line structure of the high-altitude 330kV substation according to claim 3, characterized in that, Both the second and third hanging wires include three phase wires, and the corresponding phase wires of the third hanging wire and the second hanging wire are connected through the branch wire.

5. The multi-directional outgoing line structure of the high-altitude 330kV substation according to claim 4, characterized in that, The third hanging line is positioned close to the second frame column.

6. The multi-directional outgoing line structure of the high-altitude 330kV substation according to claim 5, characterized in that, The height of the busbar hanging beam is 19.5±0.5m; the height of the lower outgoing hanging beam is 23±0.5m; the height of the reverse outgoing hanging beam is 26.5±0.5m; the height of the upper outgoing hanging beam is 35.5±0.5m; and the height of the side outgoing hanging beam is 37±0.5m.

7. The multi-directional outgoing line structure of the high-altitude 330kV substation according to claim 6, characterized in that, The top of the first frame column is provided with a grounding wire hanging point, and the height of the grounding wire hanging point is 52±0.5m.

8. The multi-directional outgoing line structure of the high-altitude 330kV substation according to claim 7, characterized in that, A lightning rod is installed at the top of the second frame column, and the height of the lightning rod is 53±0.5m.

9. The multi-directional outgoing line structure of the high-altitude 330kV substation according to claim 8, characterized in that, Multiple busbars are suspended below the busbar hanging beam. The busbars are arranged along the first direction, and the multiple busbars are spaced apart along the second direction. The height of the busbars is 15.5±0.5m.

10. The multi-directional outgoing line structure of a high-altitude 330kV substation according to claim 9, characterized in that, It also includes two edge circuit breakers and one intermediate circuit breaker. The two edge circuit breakers are located on the inner side of the first incoming and outgoing bushing and the second incoming and outgoing bushing, respectively, and the intermediate circuit breaker is located close to one of the edge circuit breakers.

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