Multi-loop gas insulation power pipe gallery, power transmission system and control method

Abstract

The invention belongs to the technical field of electromechanical engineering and power transmission and transformation, and particularly relates to a multi-loop gas insulation power pipe gallery, a power transmission system and a control method. The multi-loop gas insulation electric power pipe gallery comprises a controller and a pipe gallery main body. The pipe gallery main body comprises a pipe gallery outer wall, two bus bars installed in the pipe gallery outer wall, a plurality of connecting buses, a standby pipeline bus and a plurality of single-phase pipeline buses. The standby pipeline bus, the two bus bars and the gas insulation pipeline bus assemblies are fixedly installed in the outer wall of the pipe gallery through fixing structures. The standby pipeline bus is connected between the two bus bars; the single-phase pipeline bus comprises a first connecting section, a first main body section and a second connecting section which are sequentially arranged along the axial direction; the two ends of each first main body section are respectively connected with the two bus bars through a connecting bus bar, the two ends of each first main body section are respectively provided with an isolating switch, and each connecting bus bar is provided with an isolating switch; and the controller is used for controlling the on-off of each isolating switch.

Description

Technical Field

[0001] The present invention belongs to the field of electromechanical engineering and power transmission and transformation technology, and specifically relates to a multi-circuit gas-insulated power pipeline corridor, a power transmission system and a control method. Background Art

[0002] A multi-circuit gas-insulated power pipeline corridor is a power transmission facility that uses a fully welded metal shell. The internal conductor is supported on the shell by a bracket or a basin-type insulator with a gas isolation function. The interior is filled with 0.2Mpa~0.8Mpa (usually 0.5Mpa for 500kV) of SF6 insulating gas.

[0003] During the operation of existing multi-circuit gas-insulated power pipeline corridors, single-phase pipeline busbars often fail. In existing multi-circuit gas-insulated power pipeline corridors, when a single-phase pipeline busbar in any circuit fails, the circuit can usually only be powered off (all single-phase pipeline busbars in the circuit are powered off) before the failed single-phase pipeline busbar can be repaired. This has technical problems such as the inability to achieve non-stop maintenance, low power transmission reliability, and low operation and maintenance convenience. Summary of the Invention

[0004] In order to solve the defects of the above-mentioned prior art, the present invention provides a multi-circuit gas-insulated power pipeline corridor, a power transmission system and a control method to solve the technical problems of the existing multi-circuit gas-insulated power pipeline corridor, such as the inability to achieve non-stop maintenance, low power transmission reliability, and low operation and maintenance convenience when a single-phase pipeline bus fails.

[0005] In order to achieve the above object, the technical solution of the present invention is as follows: A multi-circuit gas-insulated power pipeline gallery, comprising: a controller and a pipeline gallery body, the pipeline gallery body comprising an outer wall of the pipeline gallery, two busbars installed in the outer wall of the pipeline gallery, a plurality of connecting busbars, a spare pipeline busbar, and a plurality of gas-insulated pipeline busbar assemblies; The spare pipeline busbar, the two busbars and each gas-insulated pipeline busbar assembly are fixedly installed in the outer wall of the pipeline gallery through a fixing structure; each group of gas-insulated pipeline busbar assemblies includes multiple single-phase pipeline busbars; The standby pipeline bus is connected between the two busbars; The single-phase pipeline busbar comprises a first connecting section, a first main section and a second connecting section arranged in sequence along its axial direction; The first end of each of the first main body segments is connected to one of the busbars via a connecting busbar, and the second end of each of the first main body segments is connected to another of the busbars via a connecting busbar; A first isolating switch is provided on the side of each first main body section close to the first end, a second isolating switch is provided on the side of each first main body section close to the second end, and a third isolating switch is provided on each connecting bus; the controller is used to control the on and off of each first isolating switch, each second isolating switch and each third isolating switch.

[0006] By setting the busbar, the connecting busbar, the standby pipeline busbar, the first isolating switch, the second isolating switch and the third isolating switch, when a fault occurs in the first main section of any single-phase pipeline busbar, the controller can be used to control the first isolating switch and the second isolating switch on the first main section to be closed, and the two third isolating switches on the two connecting buses connected to the first main section to be opened, so as to cut off the power supply to the first main section, and make the first connecting section and the second connecting section of the single-phase pipeline busbar connected to the second main section through the two connecting buses, the two busbars of the multi-circuit gas insulated power pipeline corridor, and the connecting busbars. When the spare pipeline busbar between the two busbars is electrically connected, the faulty first main section of the single-phase pipeline busbar can be repaired without cutting off the power to the circuit to which the faulty single-phase pipeline busbar belongs (that is, the gas-insulated pipeline busbar assembly to which the single-phase pipeline busbar belongs). This enables non-stop maintenance of the first main section of any single-phase pipeline busbar, improves power transmission reliability and convenience of operation and maintenance, and solves the technical problems of existing multi-circuit gas-insulated power pipeline corridors that cannot be repaired without power outages, have low power transmission reliability, and have low convenience of operation and maintenance when a single-phase pipeline busbar fails.

[0007] Furthermore, the cross-section of the outer wall of the pipe gallery is annular; the outer wall of the pipe gallery includes a first diameter-expanding section, a second main section, and a second diameter-expanding section arranged in sequence along its axial direction; the inner diameters of the first diameter-expanding section and the second diameter-expanding section are both larger than the inner diameter of the second main section, so as to form an annular mounting groove at each end of the inner cavity of the outer wall of the pipe gallery; The fixing structure includes a first fixing component and a second fixing component; The busbar is annular, and one busbar is installed in each of the two annular mounting grooves. The busbar surrounds the outside of the standby pipeline busbar and each of the single-phase pipeline busbars. The busbar is fixedly installed in the corresponding annular mounting groove by a set of the first fixing components. The standby pipeline busbar and each of the single-phase pipeline busbars are fixedly connected to the inner wall of the second main body section through a second fixing assembly.

[0008] Furthermore, the spare pipeline busbar and each of the single-phase pipeline busbars are evenly arranged along the circumference of the outer wall of the pipeline gallery.

[0009] Furthermore, the second fixing assembly includes a plurality of annular support members spaced apart along the axial direction of the second main body segment; The outer circumferential surface of the annular support member is integrally formed on the inner wall of the second main body section; the spare pipeline busbar and each of the single-phase pipeline busbars are fixedly mounted on the annular support member.

[0010] By providing the annular support member and then using the annular support member to fix the standby pipeline busbar and each single-phase pipeline busbar, the standby pipeline busbar and each single-phase pipeline busbar can be arranged along the inner circumference of the outer wall of the corridor, so that the multi-circuit gas-insulated power corridor provided by the present invention can maximize space utilization and reduce the engineering workload and construction cost of the corridor project.

[0011] Furthermore, the annular support member is provided with a plurality of mounting holes, the number of the mounting holes being consistent with the total number of the standby pipeline busbars and the single-phase pipeline busbars, and being arranged in a one-to-one correspondence; Each of the mounting holes extends along the axial direction of the outer wall of the pipe gallery, and each of the mounting holes is evenly distributed along the circumference of the outer wall of the pipe gallery; the spare pipeline busbar and each of the single-phase pipeline busbars pass through the corresponding mounting holes on each of the annular support members in sequence along the axial direction of the outer wall of the pipe gallery to be fixedly mounted on each of the annular support members.

[0012] In another technical solution, each of the gas-insulated pipeline busbar assemblies is arranged bilaterally symmetrically inside the outer wall of the pipe gallery; The busbars extend along the circumference of the outer wall of the pipe gallery and surround the outer sides of each of the single-phase pipeline busbars.

[0013] Furthermore, the multi-circuit gas-insulated power pipeline corridor also includes two fourth disconnectors, one end of the standby pipeline bus is connected to one of the busbars through one of the fourth disconnectors; the other end of the standby pipeline bus is connected to another busbar through another fourth disconnector; the controller is also used to control the on and off of each of the fourth disconnectors.

[0014] Furthermore, each of the first connecting sections is provided with a fifth isolating switch, and each of the second connecting sections is provided with a sixth isolating switch; The controller is further configured to control the on and off of each of the fifth isolating switches and each of the sixth isolating switches.

[0015] According to the multi-circuit gas-insulated power pipeline corridor provided by the present invention, the present invention also provides a power transmission system, including a substation, a distribution network high-voltage terminal equipment, and the multi-circuit gas-insulated power pipeline corridor provided by the present invention; the pipeline corridor body of the multi-circuit gas-insulated power pipeline corridor is connected between the substation and the distribution network high-voltage terminal equipment.

[0016] According to the power transmission system provided by the present invention, the present invention also provides a control method for the power transmission system, comprising: Using a controller of a multi-circuit gas-insulated power pipeline corridor of the power transmission system, control each first isolating switch and each second isolating switch of the multi-circuit gas-insulated power pipeline corridor to be turned on, and control each third isolating switch of the multi-circuit gas-insulated power pipeline corridor to be turned off, so that the power transmission system can transmit power normally; After a fault occurs in the first main section of any single-phase pipeline busbar of the multi-circuit gas-insulated power pipeline gallery, the controller is used to control the first disconnector and the second disconnector on the first main section to be closed, and to control the two third disconnectors on the two connecting buses connected to the first main section to be opened, so as to cut off the power to the first main section, and make the first connecting section and the second connecting section of the single-phase pipeline busbar electrically connected through the two connecting buses, the two busbars of the multi-circuit gas-insulated power pipeline gallery, and the spare pipeline busbar connected between the two busbars. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in the implementation. Obviously, the drawings described below are only some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 is a schematic cross-sectional structural diagram of the first diameter expansion section in Example 1; Figure 2 is a schematic cross-sectional structural diagram of the second main body segment in Example 1; Figure 3 This is a simplified diagram of the connection structure of the busbar, the connecting busbar, the single-phase pipeline busbar, and the spare pipeline busbar in Example 1; Figure 4 This is a single-line schematic diagram of the multi-circuit gas-insulated power pipeline corridor in Example 1; Figure 5 Schematic diagram of the cross-sectional structure of the multi-circuit gas-insulated power pipeline corridor in Example 2; Among them, 1 is the outer wall of the pipe gallery, 2 is the busbar, 3 is the connecting busbar, 4 is the spare pipeline busbar, 5 is the single-phase pipeline busbar, 6 is the first disconnector, 7 is the second disconnector, 8 is the third disconnector, 9 is the annular support member, 10 is the fourth disconnector, 11 is the fifth disconnector, and 12 is the sixth disconnector. 5.1—First connecting section, 5.2—First main section, 5.3—Second connecting section. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Example 1:

[0021] like Figures 1 to 5 As shown, this embodiment 1 provides a multi-circuit gas-insulated power pipeline corridor, comprising: a controller and a pipeline corridor body, the pipeline corridor body comprising a pipeline corridor outer wall 1, two busbars 2 installed in the pipeline corridor outer wall 1, multiple connecting busbars 3, a spare pipeline busbar 4, and multiple sets of gas-insulated pipeline busbar assemblies; The spare pipeline busbar 4, the two busbars 2 and each gas-insulated pipeline busbar assembly are fixedly installed in the outer wall 1 of the pipeline gallery through a fixed structure; each set of gas-insulated pipeline busbar assemblies includes multiple single-phase pipeline busbars 5; The spare pipeline busbar 4 is connected between the two busbars 2; The single-phase pipeline busbar 5 comprises a first connecting section 5.1, a first main section 5.2 and a second connecting section 5.3 arranged in sequence along its axial direction; The first end of each first main body segment 5.2 is connected to one of the busbars 2 via a connecting busbar 3, and the second end of each first main body segment 5.2 is connected to the other busbar 2 via a connecting busbar 3; A first isolating switch 6 is provided on the side of each first main section 5.2 close to the first end, a second isolating switch 7 is provided on the side of each first main section 5.2 close to the second end, and a third isolating switch 8 is provided on each connecting busbar 3; the controller is used to control the on and off of each first isolating switch 6, each second isolating switch 7 and each third isolating switch 8.

[0022] In order to simplify the drawings and facilitate those skilled in the art to understand the technical solutions described in the present invention, Figure 1 The number of single-phase pipeline busbars 5 has been reduced, and only two single-phase pipeline busbars 5 are drawn. Figures 1 to 5 The number of the single-phase pipeline busbars 5 shown in the figure does not impose any limitation on the protection scope of the present invention.

[0023] By providing the busbar 2, the connecting busbar 3, the standby pipeline busbar 4, the first isolating switch 6, the second isolating switch 7 and the third isolating switch 8, when a fault occurs in the first main section 5.2 of any single-phase pipeline busbar 5, the controller can be used to control the first isolating switch 6 and the second isolating switch 7 on the first main section 5.2 to be closed, and the two third isolating switches 8 on the two connecting busbars 3 connected to the first main section 5.2 to be opened, so as to cut off the power supply to the first main section 5.2, and enable the first connecting section 5.1 and the second connecting section 5.3 of the single-phase pipeline busbar 5 to be connected to the power supply via the two connecting busbars 3 and the two busbars 2 of the multi-circuit gas-insulated power pipeline corridor. And the spare pipeline busbar 4 connected between the two busbars 2 is electrically connected, so that the faulty first main section 5.2 of the single-phase pipeline busbar 5 can be repaired without cutting off the power to the circuit to which the faulty single-phase pipeline busbar 5 belongs (that is, the gas-insulated pipeline busbar assembly to which the single-phase pipeline busbar 5 belongs). This can achieve non-stop maintenance of the first main section 5.2 of any single-phase pipeline busbar 5, thereby improving power transmission reliability and convenience of operation and maintenance, and solving the technical problems of existing multi-circuit gas-insulated power pipeline corridors, such as the inability to achieve non-stop maintenance, low power transmission reliability, and low operation and maintenance convenience when a single-phase pipeline busbar 5 fails.

[0024] The group of gas-insulated pipeline busbar assemblies described in the present invention also refers to one loop in a multi-loop gas-insulated power pipeline corridor, and generally includes three single-phase pipeline busbars 5 .

[0025] like Figure 1 and Figure 2 As shown, in this embodiment 1, the cross-section of the pipe gallery outer wall 1 is annular; the pipe gallery outer wall 1 includes a first diameter-expanding section, a second main section, and a second diameter-expanding section arranged in sequence along its axial direction; the inner diameters of the first diameter-expanding section and the second diameter-expanding section are both larger than the inner diameter of the second main section, so as to form an annular mounting groove at each end of the inner cavity of the pipe gallery outer wall 1; The fixing structure includes a first fixing component and a second fixing component; The busbar 2 is annular, with one busbar 2 installed in each of the two annular mounting grooves. The busbar 2 surrounds the outside of the standby pipeline busbar 4 and each single-phase pipeline busbar 5. The busbar 2 is fixedly installed in the corresponding annular mounting groove by a set of first fixing components (not shown in the figure); The spare pipeline busbar 4 and each single-phase pipeline busbar 5 are fixedly connected to the inner wall of the second main body section through a second fixing assembly.

[0026] In this embodiment 1, the cross-sectional structure of the second diameter-expanding section is consistent with the cross-sectional structure of the first diameter-expanding section, so the cross-sectional structure of the second diameter-expanding section can refer to Figure 1 shown.

[0027] Specifically, in this embodiment 1, Figure 1 and Figure 2 As shown, the spare pipeline busbar 4 and each single-phase pipeline busbar 5 are evenly arranged along the circumference of the outer wall 1 of the pipeline gallery.

[0028] Specifically, in this embodiment 1, Figure 1 and Figure 2 As shown, the second fixing assembly includes a plurality of annular support members 9 arranged at intervals along the axial direction of the second main body segment; The outer circumference of the annular support member 9 is integrally formed on the inner wall of the second main body section; the spare pipeline busbar 4 and each single-phase pipeline busbar 5 are fixedly mounted on the annular support member 9 .

[0029] By providing an annular support member 9 and then using the annular support member 9 to fix and install the spare pipeline busbar 4 and each single-phase pipeline busbar 5, the spare pipeline busbar 4 and each single-phase pipeline busbar 5 can be arranged along the inner circumference of the outer wall 1 of the corridor, so that the multi-circuit gas-insulated power corridor provided by the present invention can maximize space utilization and reduce the engineering workload and construction cost of the corridor project.

[0030] Specifically, in this embodiment 1, Figure 1 and Figure 2 As shown, the annular support member 9 is provided with a plurality of mounting holes, the number of which is consistent with the total number of the spare pipeline busbars 4 and the single-phase pipeline busbars 5, and are arranged in a one-to-one correspondence; Each mounting hole extends along the axial direction of the outer wall 1 of the pipe gallery, and each mounting hole is evenly distributed along the circumference of the outer wall 1 of the pipe gallery; the spare pipeline busbar 4 and each single-phase pipeline busbar 5 pass through the corresponding mounting holes on each annular support member 9 in sequence along the axial direction of the outer wall 1 of the pipe gallery to be fixedly installed on each annular support member 9.

[0031] Specifically, in this embodiment 1, Figures 1 to 4 As shown, the multi-circuit gas-insulated power pipeline corridor also includes two fourth disconnectors 10. One end of the standby pipeline bus 4 is connected to one of the busbars 2 through one of the fourth disconnectors 10; the other end of the standby pipeline bus 4 is connected to another busbar 2 through another fourth disconnector 10; the controller is also used to control the on and off of each fourth disconnector 10.

[0032] Specifically, in this embodiment 1, Figures 1 to 4 As shown, each first connecting section 5.1 is provided with a fifth isolating switch 11, and each second connecting section 5.3 is provided with a sixth isolating switch 12; The controller is further used to control the on and off of each fifth isolating switch 11 and each sixth isolating switch 12 .

[0033] Example 2:

[0034] According to the multi-circuit gas-insulated power pipeline corridor provided in Example 1, Example 2 also provides a multi-circuit gas-insulated power pipeline corridor. The structures of the two are similar. The difference between Example 2 and Example 1 lies in the difference in the layout of each gas-insulated pipeline busbar assembly.

[0035] In this embodiment 2, Figure 5 As shown, each gas-insulated pipeline busbar assembly is arranged symmetrically on the left and right inside the outer wall 1 of the pipe gallery; The busbar 2 extends along the circumference of the outer wall 1 of the pipe gallery and surrounds the outer side of each single-phase pipeline busbar 5.

[0036] By arranging the gas-insulated pipeline busbar assemblies symmetrically in the outer wall 1 of the pipeline gallery, the busbar 2 extends along the circumference of the outer wall 1 of the pipeline gallery and surrounds the outside of each single-phase pipeline busbar 5. The multi-circuit gas-insulated power pipeline gallery provided by the present invention can adapt to the layout form in which each single-phase pipeline busbar 5 is arranged along the circumference of the outer wall 1 of the pipeline gallery, and can also adapt to the conventional layout form in which each single-phase pipeline busbar 5 is arranged symmetrically in the left and right, thereby improving the adaptability of the gas-insulated power pipeline gallery.

[0037] Example 3:

[0038] Based on the multi-circuit gas-insulated power pipeline corridor provided in Example 1 and Example 2, Example 3 provides a power transmission system, including a substation, a distribution network high-voltage terminal device, and the multi-circuit gas-insulated power pipeline corridor provided in Example 1 or Example 2; the pipeline corridor body of the multi-circuit gas-insulated power pipeline corridor is connected between the substation and the distribution network high-voltage terminal device.

[0039] Example 4:

[0040] Based on the power transmission system provided in Example 3, Example 4 provides a control method for the power transmission system, including: The controller of the multi-circuit gas-insulated power pipeline corridor of the power transmission system is used to control the first disconnectors 6 and the second disconnectors 7 of the multi-circuit gas-insulated power pipeline corridor to be turned on, and the third disconnectors 8 of the multi-circuit gas-insulated power pipeline corridor to be turned off, so that the power transmission system can transmit power normally; After a fault occurs in the first main section 5.2 of any single-phase pipeline busbar 5 of a multi-circuit gas-insulated power pipeline corridor, the controller is used to control the first isolating switch 6 and the second isolating switch 7 on the first main section 5.2 to be closed, and the two third isolating switches 8 on the two connecting busbars 3 connected to the first main section 5.2 to be opened, so as to cut off the power to the first main section 5.2 and make the first connecting section 5.1 and the second connecting section 5.3 of the single-phase pipeline busbar 5 electrically connected through the two connecting busbars 3, the two busbars 2 of the multi-circuit gas-insulated power pipeline corridor, and the spare pipeline busbar 4 connected between the two busbars 2.

[0041] Among them, if the multi-circuit gas-insulated power pipeline corridor is also provided with a fourth isolating switch 10, a fifth isolating switch 11 and a sixth isolating switch 12, then when the power transmission system is transmitting power normally, the controller also controls each fourth isolating switch 10 to be closed, and controls each fifth isolating switch 11 and each sixth isolating switch 12 to be opened.

[0042] After a fault occurs in the first main section 5.2 of any single-phase pipeline bus 5 of the multi-circuit gas-insulated power pipeline corridor, the controller is also used to control all fourth disconnectors 10 to open.

[0043] Preferably, a locking interlocking device is provided, which is used to lock the first disconnector 6 and the second disconnector 7 on the first main section 5.2 closed when the two third disconnectors 8 on the two connecting busbars 3 connected to any first main section 5.2 are opened, and the first disconnectors 6 and the second disconnectors 7 on the other first main sections 5.2 are locked open, and the third disconnectors 8 on the connecting busbars 3 connected to the other first main sections 5.2 are locked closed.

[0044] The multi-circuit gas-insulated power pipeline corridor, power transmission system, and control method provided by the present invention have at least the following technical effects or advantages: 1. By setting the busbar 2, the connecting busbar 3, the standby pipeline busbar 4, the first isolating switch 6, the second isolating switch 7 and the third isolating switch 8, when a fault occurs in the first main section 5.2 of any single-phase pipeline busbar 5, the controller controls the first isolating switch 6 and the second isolating switch 7 on the first main section 5.2 to be closed, and controls the two third isolating switches 8 on the two connecting busbars 3 connected to the first main section 5.2 to be opened, so as to realize power off of the first main section 5.2, and make the first connecting section 5.1 and the second connecting section 5.3 of the single-phase pipeline busbar 5 connected to the second main section 5.3 through the two connecting busbars 3 and the two busbars 2 of the multi-circuit gas-insulated power pipeline corridor. , and the spare pipeline busbar 4 connected between the two busbars 2 is electrically connected, so that the faulty first main section 5.2 of the single-phase pipeline busbar 5 can be repaired without cutting off the power to the circuit to which the faulty single-phase pipeline busbar 5 belongs (that is, the gas-insulated pipeline busbar assembly to which the single-phase pipeline busbar 5 belongs). This can achieve non-stop maintenance of the first main section 5.2 of any single-phase pipeline busbar 5, thereby improving power transmission reliability and convenience of operation and maintenance, and solving the technical problems of existing multi-circuit gas-insulated power pipeline corridors that cannot achieve non-stop maintenance, low power transmission reliability, and low operation and maintenance convenience when a single-phase pipeline busbar 5 fails.

[0045] 2. By providing an annular support member 9 and then using the annular support member 9 to fix and install the spare pipeline busbar 4 and each single-phase pipeline busbar 5, the spare pipeline busbar 4 and each single-phase pipeline busbar 5 can be arranged along the inner circumference of the outer wall 1 of the corridor, so that the multi-circuit gas-insulated power corridor provided by the present invention can maximize space utilization and reduce the engineering workload and construction cost of the corridor project.

[0046] 3. By arranging the gas-insulated pipeline busbar assemblies symmetrically in the outer wall 1 of the pipeline gallery, the busbar 2 extends along the circumference of the outer wall 1 of the pipeline gallery and surrounds the outside of each single-phase pipeline busbar 5. The multi-circuit gas-insulated power pipeline gallery provided by the present invention can adapt to the layout form in which each single-phase pipeline busbar 5 is arranged along the circumference of the outer wall 1 of the pipeline gallery, and can also adapt to the conventional layout form in which each single-phase pipeline busbar 5 is arranged symmetrically on the left and right, thereby improving the adaptability of the gas-insulated power pipeline gallery.

[0047] The above are only specific application examples of the present invention and do not constitute any limitation to the protection scope of the present invention. Any technical solutions formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the present invention.

Claims

1. A multi-circuit gas-insulated power pipeline corridor, characterized in that: include: The controller and the pipe gallery body, the pipe gallery body includes the outer wall of the pipe gallery, two busbars installed in the outer wall of the pipe gallery, multiple connecting busbars, a spare pipeline busbar, and multiple groups of gas-insulated pipeline busbar assemblies; The spare pipeline busbar, the two busbars and each gas-insulated pipeline busbar assembly are fixedly installed in the outer wall of the pipeline gallery through a fixing structure; each group of gas-insulated pipeline busbar assemblies includes multiple single-phase pipeline busbars; The standby pipeline bus is connected between the two busbars; The single-phase pipeline busbar comprises a first connecting section, a first main section and a second connecting section arranged in sequence along its axial direction; The first end of each of the first main body segments is connected to one of the busbars via a connecting busbar, and the second end of each of the first main body segments is connected to another of the busbars via a connecting busbar; A first isolating switch is provided on the side of each first main body section close to the first end, a second isolating switch is provided on the side of each first main body section close to the second end, and a third isolating switch is provided on each connecting bus; the controller is used to control the on and off of each first isolating switch, each second isolating switch and each third isolating switch.

2. The multi-circuit gas-insulated power pipeline corridor according to claim 1, characterized in that: The cross-section of the outer wall of the pipe gallery is annular; the outer wall of the pipe gallery includes a first diameter-expanding section, a second main section, and a second diameter-expanding section arranged in sequence along its axial direction; the inner diameters of the first diameter-expanding section and the second diameter-expanding section are both larger than the inner diameter of the second main section, so as to form an annular mounting groove at each end of the inner cavity of the outer wall of the pipe gallery; The fixing structure includes a first fixing component and a second fixing component; The busbar is annular, and one busbar is installed in each of the two annular mounting grooves. The busbar surrounds the outside of the standby pipeline busbar and each of the single-phase pipeline busbars. The busbar is fixedly installed in the corresponding annular mounting groove by a set of the first fixing components. The standby pipeline busbar and each of the single-phase pipeline busbars are fixedly connected to the inner wall of the second main body section through a second fixing assembly.

3. The multi-circuit gas-insulated power pipeline corridor according to claim 2, characterized in that: The spare pipeline busbar and each single-phase pipeline busbar are evenly arranged along the circumference of the outer wall of the pipeline gallery.

4. The multi-circuit gas-insulated power pipeline corridor according to claim 3, characterized in that: The second fixing assembly includes a plurality of annular support members arranged at intervals along the axial direction of the second main body segment; The outer circumferential surface of the annular support member is integrally formed on the inner wall of the second main body section; the spare pipeline busbar and each of the single-phase pipeline busbars are fixedly mounted on the annular support member.

5. The multi-circuit gas-insulated power pipeline corridor according to claim 4, characterized in that: The annular support member is provided with a plurality of mounting holes, the number of which is consistent with the total number of the spare pipeline busbars and the single-phase pipeline busbars, and is arranged in a one-to-one correspondence; Each of the mounting holes extends along the axial direction of the outer wall of the pipe gallery, and each of the mounting holes is evenly distributed along the circumference of the outer wall of the pipe gallery; the spare pipeline busbar and each of the single-phase pipeline busbars pass through the corresponding mounting holes on each of the annular support members in sequence along the axial direction of the outer wall of the pipe gallery to be fixedly mounted on each of the annular support members.

6. The multi-circuit gas-insulated power pipeline corridor according to claim 1, characterized in that: Each of the gas-insulated pipeline busbar assemblies is arranged bilaterally symmetrically within the outer wall of the pipe gallery; The busbars extend along the circumference of the outer wall of the pipe gallery and surround the outer sides of each of the single-phase pipeline busbars.

7. The multi-circuit gas-insulated power pipeline corridor according to claim 1, characterized in that: It also includes two fourth isolating switches, one end of the standby pipeline bus is connected to one of the busbars through one of the fourth isolating switches; the other end of the standby pipeline bus is connected to the other busbar through another fourth isolating switch; the controller is also used to control the on and off of each of the fourth isolating switches.

8. The multi-circuit gas-insulated power pipeline corridor according to claim 1, characterized in that: Each of the first connecting sections is provided with a fifth isolating switch, and each of the second connecting sections is provided with a sixth isolating switch; The controller is further configured to control the on and off of each of the fifth isolating switches and each of the sixth isolating switches.

9. A power transmission system, characterized in that: It comprises a substation, a distribution network high-voltage terminal device, and a multi-circuit gas-insulated power pipeline corridor according to any one of claims 1 to 8; the pipeline corridor body of the multi-circuit gas-insulated power pipeline corridor is connected between the substation and the distribution network high-voltage terminal device.

10. A control method for a power transmission system according to claim 9, characterized in that: include: Using a controller of a multi-circuit gas-insulated power pipeline corridor of the power transmission system, control each first isolating switch and each second isolating switch of the multi-circuit gas-insulated power pipeline corridor to be turned on, and control each third isolating switch of the multi-circuit gas-insulated power pipeline corridor to be turned off, so that the power transmission system can transmit power normally; After a fault occurs in the first main section of any single-phase pipeline busbar of the multi-circuit gas-insulated power pipeline gallery, the controller is used to control the first disconnector and the second disconnector on the first main section to be closed, and to control the two third disconnectors on the two connecting buses connected to the first main section to be opened, so as to cut off the power to the first main section, and make the first connecting section and the second connecting section of the single-phase pipeline busbar electrically connected through the two connecting buses, the two busbars of the multi-circuit gas-insulated power pipeline gallery, and the spare pipeline busbar connected between the two busbars.

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