CN110707537B

CN110707537B - A GIS equipment including a Z-shaped transition section

Info

Publication number: CN110707537B
Application number: CN201810747494.8A
Authority: CN
Inventors: 王亚鸽; 王振; 苏戈; 秦晓宇; 秦政敏; 刘分; 张路阳; 马志强; 闫飞越; 尹亚伟; 杨静; 张嘉路
Original assignee: Henan Pingzhi High Voltage Switchgear Co ltd; Pinggao Group Co Ltd; State Grid Corp of China SGCC
Current assignee: Henan Pingzhi High Voltage Switchgear Co ltd; Pinggao Group Co Ltd; State Grid Corp of China SGCC
Priority date: 2018-07-09
Filing date: 2018-07-09
Publication date: 2021-09-07
Anticipated expiration: 2038-07-09
Also published as: CN110707537A

Abstract

The invention provides a GIS device including a Z-shaped transition section, and relates to the technical field of high-voltage power transmission and transformation. GIS equipment including Z-type transfer section includes main busbar, sub-interval and Z-type transfer section, Z-type transfer section includes Z-shaped cylindrical shell and three-phase Z-shaped transfer conductor, Z-shaped cylindrical shell The two connecting sections of the body are respectively connected to the corresponding port positions of the main busbar. The Z-type transfer conductor includes a transition section conductor, a bent conductor and a conductor socket. The conductor socket is electrically and fixedly connected to the bent conductor and is insulated along the radial direction of the conductor socket. A supporting insulator is fixedly connected, with threaded holes at both ends. The Z-type transfer conductor is fixed in the Z-shaped cylindrical shell by bolts and the supporting insulator. Keep collinear, only the "Ω"-shaped transition bulge between the segment interval and the Z-type transition segment achieves the purpose of reducing the occupied space.

Description

GIS equipment containing Z type switching section

Technical Field

The invention relates to the technical field of high-voltage power transmission and transformation, in particular to GIS equipment comprising a Z-shaped switching section.

Background

With the development of global power system and the increasing requirement for the reliability of system operation, SF₆Gas Insulated metal-enclosed Switchgear (GIS) is increasingly used. To improve the reliability of the power supply of the power system, the substation usually adopts a double bus or 3/2 wiring mode. At present, a 110kV and 220kV GIS main bus generally adopts a three-phase common-box structure, and compared with a single-phase box-separated main bus, the common-box type main bus has the following advantages: 1. the number of main bus shells is reduced from 3 to 1, SF₆The gas consumption is reduced, the probability of possible leakage is lower, and therefore, the environmental protection is facilitated; 2. the number of the butt joint surfaces is reduced from 3 to 1 during field assembly, so that the installation operation is convenient. Taking a typical 220kV GIS transformer substation with double bus double-section wiring mode as an example, the transformer substation generally comprises basic interval types such as standard incoming line interval, standard outgoing line interval, section interval, bus connection interval and the like, wherein a main bus is taken as an important component of a GIS and combined with other functional units in a GIS product to realize the protection function of a high-voltage switch in a power system.

In a substation, the communication between different functional compartments is realized by a primary main loop through a main bus. As shown in the attached drawing 1, the existing transformer substation adopts a double-bus double-subsection wiring mode, main buses are transversely staggered at subsection intervals, the overall occupied space of the main buses is changed from two buses to three buses, the transverse size of the main buses is increased, the overall occupied space is large, and the required transverse size of a room is also increased. Correspondingly, the main bus supporting structure changes correspondingly according to the wiring form of the main bus, the arrangement of the supporting structure is changed into a transverse staggered form, the routing inspection channel is also arranged in a transverse staggered layer along with the wiring of the main bus, more technical requirements are provided for capital construction, a series of matched structures are changed, and finally the construction difficulty and cost are increased.

Disclosure of Invention

The invention aims to provide GIS equipment comprising a Z-shaped switching section, and aims to solve the problems that the existing main bus arrangement occupies a large space and is difficult to construct and high in cost.

In order to achieve the purpose, the technical scheme of the GIS equipment comprising the Z-shaped switching section is as follows:

the GIS equipment comprising the Z-shaped switching section comprises a main bus, wherein the main bus comprises a front bus and a rear bus which are coaxially arranged, the front bus and the rear bus are connected with the Z-shaped switching section through a sectional interval, and the sectional interval and the Z-shaped switching section form an omega-shaped transitional connection area between the front bus and the rear bus.

Has the advantages that: in the engineering practice of transformer substation construction, the front and rear buses are coaxial by arranging the sectional space between the two buses, and the Z-shaped switching section is arranged to ensure that the conductor is arranged in a Z shape, but not to ensure that the shell is in a Z shape, and the shell only needs to be covered outside the conductor in a sealing manner. Only be "omega" shape protruding transition between segmentation interval and Z type changeover portion, "omega" shape here also indicates the shape of conductor wherein, and the main bus is generally in collinear position, has reached the purpose that reduces occupation space, and corresponding supporting structure also can follow the axis direction straight line extension of main bus like the bearing structure of main bus, patrol and examine the passageway etc. and arrange moreover, compares in staggered floor and arranges, and the structure is simpler, has reduced the construction degree of difficulty and cost.

The GIS equipment can be a main bus, and comprises two parallel main buses, so that the reliability of power transmission is guaranteed, and the problem that power cannot be stably supplied due to the fact that related equipment on the main buses fails is solved.

In order to simplify the structure of the shell of the Z-shaped adapter section and facilitate the installation operation, the Z-shaped adapter section is further defined, the Z-shaped adapter section comprises a Z-shaped adapter conductor, and the shell for sealing the adapter conductor is a Z-shaped cylindrical shell matched with the Z-shaped adapter section.

When the transition section shell is a Z-shaped cylindrical shell, the conductor is assembled in the shell to form a Z-shaped transition section, and the installation mode is further limited, the Z-shaped cylindrical shell comprises a transition section shell and two parallel connecting section shells, the two parallel connecting section shells are connected with the corresponding section shells, the Z-shaped transition conductor comprises a transition section conductor arranged in the transition section shell, two parallel connecting section conductors arranged in the two connecting section shells and an elbow part for connecting the transition section conductor and the corresponding connecting section conductor, a port is formed in at least one end of the transition section shell, and a sealing end cover is detachably installed at the port to enable the transition section conductor to be installed in the transition section shell from the port. And opening the sealing end cover, installing the transition section conductors into the sealing end cover, directly placing the two connecting section conductors into the corresponding connecting section shell, and inserting the conductors into Z-shaped switching conductors to realize the assembly of the conductors.

To reduce the number of parts to facilitate installation, it is further defined that the elbow portion is disposed on one of the transition section conductor or the connection section conductor.

The elbow portions may be provided at both ends of the transition section conductor, and likewise, the elbow portions are provided on the connection section conductor.

In order to realize that Z type changeover portion is connected with the cartridge of preceding, back end generating line, improves the commonality of accessories, further prescribes a limit to Z type changeover portion, Z type changeover portion still includes supporting insulator, the connecting segment conductor include with supporting insulator fixed connection's conductor socket, still include the bending conductor of being connected with the conductor socket, the elbow part sets up on the bending conductor.

In order to enable the Z-shaped cylindrical shell to be communicated with the shell of the main bus in a sealing mode, achieve good sealing of arc extinguishing gas in the shell and ensure stable arc extinguishing effect, the connection mode is further limited, and the omega-shaped transition connection area is communicated with the interior of the front-section bus and the interior of the rear-section bus. The front section of bus and the rear section of bus are communicated to form an integrated sealed space.

In order to fix the conductors in the Z-shaped cylindrical shell and reserve a space for installing other structures, the arrangement positions of the conductors at the connecting section are further limited, and the Z-shaped switching conductors have three phases and are respectively arranged at any three end positions of a cross shape.

Drawings

Fig. 1 is a schematic view of a local arrangement of GIS equipment in a conventional substation in the background art;

fig. 2 is a schematic view of a local arrangement of a GIS device according to an embodiment 1 of the present invention, which includes a Z-type transition segment;

FIG. 3 is a schematic front view of the Z-shaped transition section of FIG. 2;

FIG. 4 is a schematic view of FIG. 3 at E-E;

FIG. 5 is a schematic view of FIG. 3 at F-F;

FIG. 6 is a schematic cross-sectional view of the Z-shaped transition section of FIG. 2;

FIG. 7 is an enlarged view of a portion of FIG. 6A;

in the figure: 1. a front section bus; 2. a rear section bus; 3. segmenting intervals; 4. a Z-shaped switching section; 40. a Z-shaped cylindrical shell; 401. a transition section housing; 402. a connecting section housing; 403. sealing the end cap; 41. a Z-shaped via conductor; 411. a transition section conductor; 412. a bent conductor; 413. a conductor socket; 414. and supporting the insulator.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

In embodiment 1 of the GIS device including the Z-shaped switching section of the present invention, as shown in fig. 2 to 7, the GIS device includes two parallel main buses, on which an incoming line interval, an outgoing line interval, a segment interval 3, a bus tie interval, and the like are disposed. Through setting up the corresponding function that the interval realized the main bus, the bus-tie interval can switch on two way main bus connections, and when the main bus of wherein all the way broke down, when unable normal electrically conductive, can conduct through another way main bus, has improved the stability and the reliability of whole equipment. Main bus anterior segment generating line 1, back end generating line 2, segmentation interval 3 and Z type changeover portion 4 make anterior segment generating line 1, back end generating line 2 keep coaxial through setting up Z type changeover portion 4, are "omega" shape protruding transition only between segmentation interval 3 and Z type changeover portion 4, and main bus is generally in the collineation position. Wherein, Z type switching section 4 indicates Z type switching conductor 41 wherein to be the zigzag, realizes with anterior segment generating line 1 and back end generating line 2's intercommunication and transition staggered floor through the conductor of this shape, has reached the purpose that reduces occupation space, and corresponding supporting structure also can follow the axis direction straight line extension of main bus like the bearing structure of main bus, patrol and examine the passageway etc. and arrange moreover, compares in staggered floor and arranges, and the structure is simpler, has reduced the construction degree of difficulty and cost.

The Z-shaped switching section 4 comprises a Z-shaped cylindrical shell 40 and three-phase Z-shaped switching conductors 41 which are fixed in the Z-shaped cylindrical shell 40 in an insulated mode, the Z-shaped switching conductors 41 are respectively arranged at any three end positions of the crisscross shape, a supporting structure for installing a main bus is reserved at the reserved positions, and the danger of electric leakage caused by the fact that the safety distance of the three-phase conductors is too small is prevented. The Z-shaped cylindrical shell 40 comprises a transition shell 401 and two parallel connecting shell 402 vertically fixed on the transition shell 401, and the two connecting shell 402 are opposite in orientation and both form right angles with the transition shell 401. Sealing end covers 403 are connected to both ends of the Z-shaped cylindrical shell 40 through bolts, and the transition section conductor 411 can be installed at a corresponding position in the transition section shell 401 by removing the sealing end covers 403, so that the assembly connection of the segmented Z-shaped transit conductors 41 in the shell is realized.

The Z-shaped transition conductor 41 includes a transition conductor 411 and a bent conductor 412, both ends of the transition conductor 411 are connected with the bent portion of the bent conductor 412 in an inserting manner, so that the actual assembly process is facilitated, and the Z-shaped transition conductor 41 also presents a Z-shaped structure in the Z-shaped cylindrical shell 40, so that a sufficient safety distance is ensured between the Z-shaped transition conductor 41 and the Z-shaped cylindrical shell 40. The outer end of each bent conductor 412 is fixed with a conductor socket 413 through a bolt, and the conductor sockets 413 are standard parts with the same shape and size, so that the mass production and the assembly are facilitated. The Z-shaped adapter conductor 41 is connected to the Z-shaped cylindrical housing 40 in an insulated manner by providing a support insulator 414 on the conductor socket 413. The supporting insulator 414 is in a column shape, threaded holes are formed in two ends of the supporting insulator, the Z-shaped switching conductor 41 is fixed in the Z-shaped cylindrical shell 40 through bolts and the supporting insulator 414, a supporting part is arranged on the Z-shaped cylindrical shell 40, the Z-shaped cylindrical shell 40 is in sealing connection with the supporting insulator 414 through the supporting part, the supporting part comprises a concave supporting plate with a downward concave plane in the middle and an end cover which is arranged at the upper end of the concave supporting plate in a sealing mode, and the concave supporting plate is fixed on the Z-shaped cylindrical shell 40 through bolts in a sealing mode.

When the arc extinguishing device is used, the two connecting section shells 402 of the Z-shaped cylindrical shell 40 are respectively connected with the shells of the front section bus 1 and the back section bus 2 in a sealing manner, the Z-shaped switching conductor 41 is in plug connection with corresponding conductors in the front section bus 1 and the back section bus 2, the Z-shaped cylindrical shell 40 is sealed with the shells of the buses and enables the omega-shaped transition connecting area, the front section bus 1 and the back section bus 2 to be communicated to form an integrated sealed space, arc extinguishing gas in the shells is well sealed, and a stable arc extinguishing effect is ensured.

The above specific embodiment 1 is a preferred embodiment of the GIS device including the Z-shaped switching segment according to the present invention, and in other embodiments, the corresponding structure may be adjusted, simplified or further optimized as needed, and specifically, there may be several following adjustment variations:

in embodiment 2 of the GIS device including the Z-type transition section according to the present invention, the GIS device including the Z-type transition section includes a main bus, the main bus includes a front bus and a rear bus that are coaxially disposed, the front bus and the rear bus are connected to the Z-type transition section through a segment gap, and the segment gap and the Z-type transition section form an "Ω" shaped transition connection region between the front bus and the rear bus. The housing of the Z-shaped transition segment in this embodiment may also take other forms besides the form in embodiment 1, where the Z-shaped transition segment is that the conductor is arranged in a zigzag shape, and does not mean that the housing is in a zigzag shape, and the housing only needs to be sealed and covered outside the conductor, for example: the shell of the Z-shaped switching section can be in an oblate shape, and interfaces for connecting the front section bus and the rear section bus are respectively arranged at the opposite corners of the oblate shape, so that the front section bus and the rear section bus are in coaxial positions.

As a further optimization of the specific embodiment 2, the specific embodiment 3 of the GIS device including the Z-type switching segment of the present invention includes two main buses in parallel, and in other embodiments, may be one or three main buses, etc., in order to ensure the reliability of power transmission.

In another embodiment, the housing of the Z-shaped transition section may be oblate, and the opposite corners of the oblate are respectively provided with an interface for connecting the front section bus bar and the rear section bus bar, so that the front section bus bar and the rear section bus bar are in coaxial positions.

As a further optimization of embodiment 4, when the transition section housing is a Z-shaped cylindrical housing, in order to assemble the conductors in the housing, a Z-shaped transition section is formed, the Z-shaped cylindrical housing includes a transition section housing and two parallel connection section housings, and is connected to the corresponding section housing through the two parallel connection section housings, the Z-shaped transition conductor includes a transition section conductor disposed in the transition section housing, two parallel connection section conductors disposed in the two connection section housings, and an elbow portion connecting the transition section conductor and the corresponding connection section conductor, at least one end of the transition section housing is provided with a port, and a sealing end cap is detachably mounted at the port for the transition section conductor to be mounted therein from the port. The sealing end cover is opened, the transition section conductors are installed in the sealing end cover, the two connecting section conductors are directly placed in the corresponding connecting section shell, and each section of conductor is inserted into the Z-shaped switching conductor, so that the assembly of the conductors is realized. Or the Z-shaped adapter conductor is a prefabricated Z-shaped structure, and the two half Z-shaped cylindrical shells are spliced to enable the Z-shaped adapter conductor to be installed in the Z-shaped adapter conductor.

As a further optimization of embodiment 5, embodiment 6 of the GIS device including the Z-shaped transition piece of the present invention, the elbow portion is disposed on one of the transition piece conductor or the connection piece conductor in order to reduce the number of parts for easy installation, and in other embodiments, the elbow portion may be a separate component connected to the transition piece conductor and the connection piece conductor by the elbow component to form the Z-shaped transition conductor.

As a further optimization of embodiment 6, embodiment 7 of the GIS device including the Z-shaped transition segment of the present invention provides that the elbow portion is disposed on the conductor of the connection segment, and in other embodiments, the elbow portion may be disposed at both ends of the conductor of the transition segment.

As a further optimization of embodiment 7, in order to implement the plug-in connection of the Z-shaped transition section with the front-section bus bar and the rear-section bus bar and improve the universality of the spare part, embodiment 8 of the GIS device including the Z-shaped transition section further includes a support insulator, the conductor of the connection section includes a conductor socket fixedly connected with the support insulator, and also includes a bent conductor connected with the conductor socket, the bent part is disposed on the bent conductor, and in other implementations, the conductor socket and the bent conductor are in an integral structure.

As a further optimization of embodiment 2 or 3, in embodiment 9 of the GIS device including the Z-shaped transition section, in order to make the Z-shaped cylindrical shell and the shell of the main bus hermetically communicate with each other, achieve good sealing of the arc-extinguishing gas in the shell, and ensure a stable arc-extinguishing effect, the Ω -shaped transition connection region is communicated with the interior of the front-stage bus and the rear-stage bus, so that the front-stage bus and the rear-stage bus are communicated to form an integrated sealed space.

As a further optimization of embodiment 2 or 3, embodiment 10 of the GIS device including the Z-shaped transition segment according to the present invention is configured such that a space for installing another structure is reserved while fixing the conductors in the Z-shaped cylindrical housing, the Z-shaped transition conductors have three phases and are respectively arranged at any three end positions of the cross shape, and in other embodiments, the three-phase conductors may be arranged at three vertex positions of the regular triangle.

Claims

1. a GIS equipment comprising Z-type transfer section, this GIS equipment comprises parallel first and second main busbars, and two main busbars all extend along the front and rear directions and are parallel up and down, it is characterized in that the first main busbar includes The coaxially arranged first front section busbar and the first rear section busbar, the second main busbar includes the coaxially arranged second front section busbar and the second rear section busbar, and the first front section and the rear section busbar pass through the first section The interval is connected with the first Z-type transition section, and the first segment interval and the first Z-type transition section form a first "Ω"-shaped transition connection area between the first front and rear busbars, and the second front, The latter two busbars are connected by a second segmented interval and a second Z-shaped transition section, and the second segmented interval and the second Z-shaped transitional section form a second "second" between the second front and rear busbars Ω"-shaped transition connection area; the first Z-shaped transfer section includes a first Z-shaped transfer conductor, a first Z-shaped cylindrical shell, and the first Z-shaped cylindrical shell is used for sealingly fitting the first Z-shaped transfer conductor, the second Z-shaped transfer section includes a second Z-shaped transfer conductor, a second Z-shaped cylindrical shell, and the second Z-shaped cylindrical shell is used for sealing the adapted second Z-shaped shell. type transfer conductor;

The first Z-shaped cylindrical shell includes a first transition section shell, a first front connecting section shell, and a first rear connecting section shell. The first transition section shell extends up and down, and the first front connecting section shell, The first rear connecting section shells all extend front and rear, the first front connecting section shell is connected to the upper end of the first transition section shell, the first rear connecting section shell is connected to the lower end of the first transition section shell, and the first The Z-shaped transition conductor includes a first transition section conductor arranged in the first transition section housing, a first front connection section conductor arranged in the first front connection section housing, and a first rear connection section housing arranged in the first rear connection section housing. The first rear connecting section conductor, the first front elbow section connecting the first front connecting section conductor and the first transition section conductor, the first rear elbow section connecting the first rear connecting section conductor and the first transition section conductor, At least one end of the first transition section housing is provided with a port, and a sealing end cover is detachably installed at the port, so that the first transition section conductor can be inserted into the port from the port;

The second Z-shaped cylindrical shell includes a second transition section shell, a second front connecting section shell, and a second rear connecting section shell. The second transition section shell extends up and down, and the second front connecting section shell, The second rear connecting section shells all extend front and rear, the second front connecting section shell is connected to the upper end of the second transition section shell, the second rear connecting section shell is connected to the lower end of the second transition section shell, the second The Z-type transition conductor includes a second transition section conductor disposed in the second transition section housing, a second front connecting section conductor disposed in the second front connecting section shell, and a second rear connecting section shell disposed in the second connecting section shell. the second rear connecting section conductor, the second front elbow section connecting the second front connecting section conductor and the second transition section conductor, the second rear elbow section connecting the second rear connecting section conductor and the second transition section conductor, At least one end of the second transition section housing is provided with a port, and a sealing end cover is detachably installed at the port, so that the second transition section conductor can be inserted into the port from the port;

The axis on which the first front and rear busbars are located is the first axis, the axis on which the second front and rear busbars are located is the second axis, and the first axis is above the second axis;

The first front connecting segment housing is on the upper side of the first shaft, the second front connecting segment housing is below the first front connecting segment housing and above the second shaft; the first rear connecting segment housing is flush with the first axis, the second rear connecting section shell is flush with the second axis; the first front connecting section shell is longer than the second front connecting section shell, and the first transition section shell is in the second transition section the rear of the segment housing.

2. The GIS equipment comprising the Z-shaped transition section according to claim 1, wherein the first front elbow part is arranged on one of the first transition section conductor or the first front connecting section conductor; The first back bend portion is provided on one of the first transition conductor or the first back connection conductor; the second front bend is provided on the second transition conductor or the second front connection conductor. on one of them; the second rear bend portion is arranged on one of the second transition section conductors or the second rear connecting section conductors.

3 . The GIS equipment comprising the Z-shaped transition section according to claim 2 , wherein the first front elbow part is arranged on the conductor of the first front connecting section, and the first rear elbow part is arranged on the first front connecting section conductor. 4 . On the first rear connecting section conductor; the second front elbow part is arranged on the second front connecting section conductor, and the second rear elbow part is arranged on the second rear connecting section conductor.

4. The GIS equipment comprising a Z-type transition section according to claim 3, wherein the first Z-type transition section further comprises a support insulator, and the first front connecting section conductor comprises a support insulator fixed The connected conductor socket also includes a first forward bend conductor connected to the conductor socket, the first forward bend portion is arranged on the first forward bend conductor, and the first rear connecting segment conductor includes a conductor that is fixedly connected to the support insulator. The conductor socket further includes a first back-bend conductor connected with the conductor socket, and the first back-bend part is arranged on the first back-bend conductor; the second Z-shaped transition section further includes a support insulator, the first The conductors of the two front connecting sections include a conductor socket fixedly connected with the supporting insulator, and also include a second forward bend conductor connected with the conductor socket, the second front bend part is arranged on the second forward bend conductor, the second rear bend The connecting section conductor includes a conductor socket fixedly connected with the support insulator, and also includes a second back bend conductor connected with the conductor socket, and the second back bend portion is arranged on the second back bend conductor.

5. The GIS equipment comprising the Z-shaped transition section according to claim 1, wherein the first "Ω"-shaped transition connection area is communicated with the inside of the first front and rear bus bars; The two "Ω"-shaped transition connection areas are communicated with the interior of the first front and rear busbars.

6. The GIS equipment comprising the Z-type switching section according to claim 1, wherein the first Z-type switching conductor has three phases, which are respectively arranged at any three end positions of the crisscross shape; the second Z-type switching conductor has three phases; The transfer conductor has three phases, which are arranged at any three end positions of the crisscross shape.