CN114243525A

CN114243525A - Opening and changing integrated machine

Info

Publication number: CN114243525A
Application number: CN202111537769.3A
Authority: CN
Inventors: 陈晓凌; 陈晓鸣; 刘明矿; 李松恩
Original assignee: Jiangsu Ankura Smart Transmission Engineering Technology Co ltd
Current assignee: Jiangsu Ankura Smart Transmission Engineering Technology Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-03-25
Anticipated expiration: 2041-12-15
Also published as: CN114243525B

Abstract

The application provides a switch all-in-one. This application is as a whole with main transformer and GIS equipment with hard tube mode sealing connection through gas insulation sleeve to through turning to the structure with GIS equipment along main transformer side parallel arrangement, not only compressed the insulating distance between the equipment, can make full use of main transformer long avris space moreover, compression GIS equipment area. This application can be under the reliable stable prerequisite of guaranteeing gas insulation, through the optimization to GIS equipment mode of arranging, with main transformer and GIS equipment compact installation on the rectangle place, improve area utilization, satisfied the transformer demand in the little place of large capacity. The utility model provides a design is full insulation connection form between main transformer and the GIS equipment, and interconnecting link does not expose in the air between the two, consequently, the all-in-one that opens of this application does not receive the influence of abominable natural climate environment and external animal completely, has high factor of safety, can satisfy the requirement to the customer to fail safe nature ability.

Description

Opening and changing integrated machine

Technical Field

The application relates to the technical field of power transformers, in particular to an opening and changing all-in-one machine.

Background

The transformer substation is divided into indoor, semi-indoor and outdoor transformer substations according to the building form and the arrangement mode of electrical equipment. The outdoor transformer substation needs to connect primary equipment such as a main transformer, a GIS and the like together according to a preset wiring scheme.

In a typical outdoor high-voltage substation, all outlet bushings of a main transformer are oil-air bushings, and an outlet of a GIS device is SF 6-air bushings.

The main transformer and the GIS equipment of the existing outdoor high-voltage substation are usually separately and independently arranged. The oil-air bushing on the high-pressure side of the main transformer and the SF 6-air bushing on the outgoing line of the main transformer of the GIS equipment need to be connected through a flexible overhead line.

The neutral point grounding device of the existing outdoor high-voltage transformer substation needs to be independently installed on a stand column support near a main transformer and is connected with an oil-air sleeve on the neutral point side of the main transformer through a flexible overhead line.

The low-voltage side of a main transformer in the existing outdoor high-voltage transformer substation usually adopts a pure magnetic sleeve. The pure magnetic sleeve is connected with a pipe bus or a bus bar, and the low-voltage pipe bus or the bus bar is exposed in the air.

In the traditional scheme, all the sleeves and the live connection contact parts are exposed in the air, and the connecting modes of the sleeves and the outgoing lines are open, so that a large floor area is required. In addition, the existing GIS equipment is usually arranged perpendicular to the length direction of the main transformer, so that a sufficient empty space area needs to be reserved on the side of the transformer to install and connect the GIS equipment.

Disclosure of Invention

This application provides an all-in-one of opening to prior art not enough, and this application is connected main transformer and GIS equipment as an organic whole through gas insulation sleeve, makes it arrange side by side, has compressed the required insulation distance of soft overhead line, and the cooperation can effectively compress the all-in-one of opening of a body coupling gained and change the installation site area to the optimization of main transformer structure. The high-capacity and high-reliability variable-voltage output device can provide high-capacity and high-reliability variable-voltage output in a smaller space place. The technical scheme is specifically adopted in the application.

First, in order to achieve the above object, a switchback all-in-one machine is provided, which includes: the main transformer comprises a main body structure and high-pressure oil-SF 6 sleeves, each high-pressure oil-SF 6 sleeve is connected with one phase of a high-pressure outlet wire of the main transformer, each phase of high-pressure oil-SF 6 sleeve is horizontally arranged at the top of one side of the main body structure along the length direction of the main body structure, and the height of each high-pressure oil-SF 6 sleeve is lower than that of the main body structure of the main transformer; one end of the gas insulation sleeve is fixedly connected with the high-pressure oil-SF 6 sleeve, and the other end of the gas insulation sleeve is fixedly connected with the GIS equipment; the GIS equipment comprises a plurality of groups of installation underframe and electrical elements arranged on the installation underframe, wherein the installation underframe is horizontally arranged on one side of a high-pressure oil-SF 6 sleeve in parallel with the length direction of the main transformer, the electrical elements are sequentially arranged in parallel along the length direction of the high-pressure oil-SF 6 sleeve between the installation underframe groups, and the electrical elements arranged on the installation underframe groups are sequentially connected with the high-pressure oil-SF 6 sleeve in series through a steering structure; the oil conservator is internally stored with insulating oil, is fixedly arranged at the top of the main transformer main body structure and is provided with a main air pipe arranged between the oil conservator and the main transformer installation gap and a pressure adjusting channel communicated with the inside of the oil conservator, and the pressure adjusting channel horizontally extends from the top of the oil conservator to the edge of the side wall of the main transformer and then bends downwards to extend to the lower part of the side wall of the main transformer; and the air cooler is arranged on the end face of the other side of the main transformer main body structure, and insulating oil of the coil is directly introduced into the air cooler through an oil guide pipe of the main transformer so as to reduce the temperature of the insulating oil in the main transformer.

Optionally, the switching all-in-one machine as described above, wherein each group of mounting chassis is provided with electrical components respectively matched with three phases of the main transformer side by side; the steering structure includes: the three-phase junction casing body is parallel to the main transformer and the mounting underframe and is arranged between the main transformer and the mounting underframe, three casing connection ports are arranged at the top of the three-phase junction casing body, each casing connection port is electrically connected with a high-pressure oil-SF 6 casing of the corresponding phase through a phase gas insulation casing, electric conductors respectively matched with the three casing connection ports are arranged in the three-phase junction casing body in parallel, the electric conductors are fixedly connected through insulation connecting pieces, and each electric conductor is electrically connected with a phase high-pressure oil-SF 6 casing; the first end of the steering sleeve is connected with one side of the three-phase converging sleeve body, three groups of mutually parallel 90-degree steering conductors are arranged in the steering sleeve at intervals, and each 90-degree steering conductor is electrically connected with one phase of electric conductor in the three-phase converging sleeve body; the three-phase separation sleeve body is parallel to the high-pressure oil-SF 6 sleeve, is connected to the second end of the steering sleeve or is arranged on one side of an electrical element on the installation underframe, three element connecting ports are arranged on the side part of the three-phase separation sleeve body, each element connecting port is electrically connected with one phase of electrical element on the installation underframe, inner conductors which are matched with the three-phase element connecting ports respectively are arranged in the three-phase separation sleeve body in parallel, the inner conductors are fixedly connected through insulating connecting pieces, and each inner conductor is electrically connected with one phase of steering conductor respectively; and the inter-group telescopic connecting sleeves are connected between the three-phase separating sleeve bodies arranged on the side parts of the two adjacent mounting underframe and are respectively connected with the inner conductors of each phase in the three-phase separating sleeve bodies in series.

Optionally, as mentioned in any above, the switching all-in-one machine, wherein, be provided with in the main transformer: three-phase coils which are sequentially arranged along the length direction of the main transformer main body structure; the three-phase high-voltage outgoing lines are respectively connected with the three-phase coils, the three-phase high-voltage outgoing lines are respectively upwards led out to the top of the same side of the main body structure of the main transformer, and then are respectively bent outwards horizontally at the top of the main transformer and connected to a phase high-pressure oil-SF 6 sleeve, and are led out horizontally outwards from the high-pressure oil-SF 6 sleeve.

Optionally, the opening and transformation all-in-one machine as described in any one of the above, wherein each phase of high-pressure oil-SF 6 bushing is horizontally connected to and matched with the gas insulation bushing of the phase, and the lower side of each phase of high-pressure oil-SF 6 bushing is provided with a support bar supported outside the main transformer box.

Optionally, the all-in-one converter as described above, wherein the neutral point of the main transformer is grounded through a gas-insulated neutral point grounding device, and a low-voltage bushing of the main transformer is a cable plug type bushing.

Optionally, the switching all-in-one machine as described in any one of the above, wherein the gas-insulated neutral point grounding device includes: a lightning arrester, a disconnector and/or a discharge gap.

Optionally, as mentioned in any above, the switch-on/switch-off all-in-one machine, wherein the isolating switch includes: the first metal shell is hermetically connected with a gas insulation tube shell at the top of the main transformer and is commonly grounded; the static contact is arranged in the gas insulation pipe shell at the top of the main transformer and is electrically connected with a neutral point of the transformer; the upper part of the moving contact is in sliding electrical connection with the first metal shell, the bottom end of the moving contact is in electrical contact with the static contact when the moving contact slides to the bottom position of the first metal shell, and the bottom end of the moving contact is separated from the static contact when the moving contact slides to the top position of the first metal shell; the switch induction coil is arranged on the periphery of the moving contact and located inside the first metal shell, and the moving contact penetrates through the switch induction coil to trigger the switch induction coil to induce the grounding current passing through the moving contact.

Optionally, the switching all-in-one machine as described in any one of the above, wherein the discharge gap includes: the second metal shell is hermetically connected with a gas insulation tube shell at the top of the main transformer and is commonly grounded; the upper part of the conducting rod is in sliding electric connection with the top of the second metal shell, and the bottom of the conducting rod is fixedly and electrically connected with a movable side ball head; the gap induction coil is arranged on the periphery of the conducting rod and positioned inside the second metal shell, and the conducting rod penetrates through the gap induction coil to trigger the gap induction coil to detect the current in the conducting rod; the static side ball head is fixedly arranged in the gas insulation pipe shell at the top of the main transformer and is electrically connected with a neutral point of the transformer; the movable side ball head is positioned in the second metal shell and above the static side ball head, and insulating gas is filled between the movable side ball head and the static side ball head; when the conducting rod slides to the top position of the second metal shell, the movable-side ball head and the fixed-side ball head are insulated; when the conducting rod slides to the bottom position of the second metal shell, an insulation gas gap is punctured between the moving side ball head and the static side ball head to discharge.

Optionally, as above, the opening and changing all-in-one machine, wherein, the oil conservator includes: the main oil conservator is of a flat polygonal prism structure, and a capsule is contained in the main oil conservator; the switch oil conservator is arranged on one side end face of the main oil conservator and is independent of the main oil conservator; the main air pipe is arranged in an installation gap between the main oil conservator and the main transformer, one end of the main air pipe is connected with the bottom of the main oil conservator, the other end of the main air pipe is connected with the main transformer, and the main air pipe has a gradient which is inclined upwards by a transformer main body box cover by not less than 2 degrees; the capsule lifting seat is arranged at the top end of the main oil storage cabinet, is fixedly connected with the top of the capsule, and forms a gas containing cavity between the top of the capsule and the top end of the capsule lifting seat in a sealing manner; the breathing channel is communicated with the interior of the capsule through the capsule lifting seat and extends to the lower part of the side wall of the main transformer from the capsule lifting seat to adjust the breathing state of the capsule; and the vacuumizing channel is communicated with the gas containing cavity, extends from the top of the capsule lifting seat to the lower part of the side wall of the main transformer and is used for adjusting the gas pressure in the gas containing cavity.

Optionally, the opening and closing all-in-one machine as described in any one of the above, wherein the capsule lifting seat includes: the lifting seat main body is connected with the top end of the main oil conservator and is provided with an opening at the top; the capsule lifting seat cover plate is connected with the lifting seat main body in a sealing mode and used for closing the opening; the top of the capsule connecting flange is hermetically connected with the capsule lifting seat cover plate, the bottom of the capsule connecting flange is hermetically connected with the top of the capsule, and a flange channel is arranged in the capsule connecting flange and communicated with the interior of the capsule; the bottom of the respirator pipe joint is connected with the capsule lifting seat cover plate into a whole, and the top of the respirator pipe joint is connected with a breathing channel; the main oil conservator air release plug is arranged on the capsule lifting seat cover plate and is communicated with the vacuumizing channel and the gas containing cavity; a first sealing ring is arranged between the capsule lifting seat cover plate and the capsule connecting flange; a second sealing ring is arranged between the capsule lifting seat cover plate and the lifting seat main body; the second sealing ring surrounds and is arranged outside the first sealing ring.

Advantageous effects

This application is as a whole with main transformer and GIS equipment with hard tube mode sealing connection through gas insulation sleeve, and through turning to the structure with GIS equipment along main transformer side parallel arrangement, the insulating distance between the equipment has not only been compressed, and can make full use of main transformer long side space, adjust GIS equipment by the arrangement mode of original perpendicular to main transformer to be on a parallel with main transformer, cooperate in a plurality of groups electrical component that main transformer length size arranged, can effectively compress the dimensional requirement to installation site length direction, reduce the required installation site area of GIS equipment. This application utilizes this kind of hard connection structure, under the reliable stable prerequisite of guaranteeing gas insulation, cooperates the inside high-pressure lead-out wire wiring mode of main transformer and the optimization of outside transformer part structure, the mode of arranging, with main transformer and GIS equipment compact installation on the rectangle place, installation distance between the compression equipment improves the utilization efficiency to the transformer substation place, has satisfied the transformer demand in the little place of large capacity. Because the design is the all insulation connection form between the main transformer of this application and the GIS equipment, interconnecting link does not expose in the air between the two, consequently, the all-in-one that opens of this application does not receive abominable natural climate environment and external animal's influence completely, has high factor of safety, can satisfy the customer to the requirement of fail safe nature ability to need not to consider the outside electrical insulation distance requirement when live-line operation, this application can also make things convenient for daily electrified to patrol and examine and maintain greatly.

Further, this application is through carrying out a series of optimizations to main transformer oil tank internal design and interior empty distance, the cooperation is to the optimization of oil conservator and cooler appearance and mounted position, large capacity main transformer's overall dimension has been reduced by a wide margin, in addition to the optimization to GIS equipment pipeline trend, will install the required length space adjustment of GIS for cooperating in main transformer length dimension's cell structure, so that the general overall dimension in both integrated back satisfies the requirement of the outer limit size in rectangle installation place, has satisfied the little place demand of large capacity. Particularly, in order to avoid the bulge structure generated by reserving the insulation distance of the tube shell on the high-voltage outgoing line side of the transformer, and the installation distance between the main transformer and the GIS equipment increased by the bulge structure and the high-voltage outgoing line side pipeline bending structure, the three-phase high-voltage outgoing line of the transformer is firstly vertically led upwards and then horizontally bent outwards in the transformer, and is directly connected to the corresponding high-voltage oil-SF 6 sleeve in a horizontal mode, so that the 90-degree steering to the high-voltage outgoing line side is directly completed in the main structure of the transformer, and the top height of the high-voltage oil-SF 6 sleeve cannot exceed the top height of the main transformer. The high-pressure oil-SF 6 casing structure horizontally arranged on one side of the top of the main transformer can cancel a Z-shaped steering pipeline arranged on the outer side of the transformer in the traditional outgoing line mode, so that the installation space required by the pipeline structure of the integrated switch machine is reduced. This application can be directly with the earlier vertical upwards extraction of three-phase high-voltage lead-out wire in the main transformer, the level stretches out again and separates and turn to three-phase circuit along transformer width direction with direct through gas insulated bushing, makes it directly match each looks electrical component on the installation chassis to short pipeline arrangement distance realizes the electricity between main transformer and the GIS equipment. According to the high-voltage lead-out wire winding device, the internal space distance between the high-voltage side of the internal coil and the width direction of the oil tank wall can be compressed, then the high-voltage lead-out wire is bent downwards and gathered by utilizing the space under the high-pressure oil-SF 6 sleeve structure on the long side of the main transformer, 90-degree line steering is realized through the three-phase converging sleeve body and the steering sleeve, and the three-phase high-voltage conductor is electrically connected with each phase of electrical element arranged on the GIS equipment installation underframe through the three-phase separating sleeve body arranged on the outer side of the end part of the installation underframe. Therefore, the height space and the width space required by wiring can be compressed, the distance of the long edge of the GIS equipment and the pipeline is limited to be consistent with the distance of the long edge of the main transformer, and therefore the installation space outside the long edge of the main transformer can be fully utilized, the high-voltage outgoing lines can be connected with the electric elements arranged on the installation underframe in series to output high-voltage signals.

The oil-SF 6 sleeve is adopted on the neutral point side of the main transformer, and the neutral point grounding is realized by a closed gas insulation neutral point grounding device. The gas insulation neutral point grounding device can be directly installed on the neutral point lifting seat and is integrated with a main transformer. The live connection parts such as the high-voltage and neutral point sleeves and the wiring terminals are completely sealed in the GIL pipeline, the low-voltage sleeve adopts a cable plug type sleeve to lead out a cable, all sleeves and outgoing line connections between the main transformer and the GIS equipment are all in a fully insulated connection mode, and all sleeves, the wiring terminals and the outgoing lines are insulated or reliably grounded through a GIL shell pipeline when the sleeves, the wiring terminals and the outgoing lines are in live operation. Can meet the requirements of customers with extremely high requirements on safety and reliability.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application.

Drawings

The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application and not limit the application. In the drawings:

FIG. 1 is a schematic diagram of the overall structure of the development and transformation integrated machine;

FIG. 2 is a block diagram of a lateral perspective of the convertible integrated unit of the present application;

FIG. 3 is a schematic diagram of the internal high voltage outgoing line of the main transformer in the present application in a side view;

FIG. 4 is a schematic view of the present invention from a top view of a convertible all-in-one machine;

FIG. 5 is a schematic diagram of a turning structure between a main transformer and GIS equipment in the present application;

FIG. 6 is a schematic illustration of the main conservator configuration of the present application;

FIG. 7 is a schematic cross-sectional view of the capsule elevation in the main conservator of FIG. 6;

FIG. 8 is a schematic view of the bladder structure suspension of the main conservator of FIG. 6;

FIG. 9 is a schematic view of the main conservator side switch conservator configuration shown in FIG. 6;

FIG. 10 is a side view of the hand hole cover in the main conservator of FIG. 6;

FIG. 11 is a cross-sectional view of a disconnect switch employed in the switchback kiosk of the present application;

FIG. 12 is a cross-sectional view of a discharge gap employed in the convertible all-in-one of the present application;

FIG. 13 is a side cross-sectional view of the fan cooler inlet tube arrangement of the convertible all-in-one of the present application;

FIG. 14 is a transverse cross-sectional view of the fan cooler inlet tube arrangement of the convertible all-in-one of the present application;

FIG. 15 is a graph comparing a natural oil circulation cooling pattern with a forced oil circulation cooling pattern in the present application;

fig. 16 is a schematic diagram of the overall structure of the GIS device used in the present application.

In the figure, 1 denotes a main conservator; 10 denotes a capsule; 12 denotes a hook; 2 denotes a capsule lifting seat; 20 denotes a capsule attachment flange; 21 denotes a respirator pipe joint; 22 denotes a capsule lifting seat cover plate; 23 denotes the main conservator bleeder cock; 201 denotes a first seal ring; 202 denotes a second seal ring; 31 denotes a hand hole; 32 denotes a manhole; 33 represents an electrical laminated wood; 4 denotes a gas relay; 41 denotes an oil tank end butterfly valve; 42 denotes a bellows; 43 denotes a case cover end butterfly valve; 44 denotes a tank lid connection elbow; 5 denotes the main conservator breather; 6 denotes a switch oil conservator breather; 7 denotes a switch conservator; 70 denotes an oil level gauge; 701 denotes a rain cover; 71 denotes a switch conservator bleeder cock; 72 denotes a respirator connection tube; 8 denotes a valve; 9 denotes a main transformer; 91 denotes a neutral point grounding device; 9111 denotes a first metal case; 9112 denotes a stationary contact; 9113 denotes a movable contact; 9114 denotes a switching induction coil; 9121 denotes a second metal housing; 9122 denotes a conductive rod; 9123 denotes a movable-side ball head; 9124 denotes a gap induction coil; 9125 denotes a dead-side ball head; 92 denotes a wind cooler; 921 represents an air cooler oil inlet pipe; 922 denotes a lower clip manifold; 923 represents a U-shaped oil guide pipe of the lower clamping piece; 93 denotes a high pressure oil-SF 6 casing; 94 denotes a gas-insulated bushing; 9511 denotes a three-phase confluence casing body; 9512 denotes a three-phase separation sleeve body; 9513 denotes inter-group telescopic joint pipes; 952 denotes a telescopic joint; 953 denotes a current transformer; 954 denotes a circuit breaker; 955 denotes a circuit breaker operating mechanism; 956 denotes a lightning arrester; 957 denotes a voltage transformer; 958 denotes a disconnector assembly; 9582 denotes a ground switch; 959 shows a mounting chassis.

Detailed Description

In order to make the purpose and technical solutions of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings of the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the application without any inventive step, are within the scope of protection of the application.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

The meaning of "and/or" as used herein is intended to include both the individual components or both.

The meaning of "inside and outside" in this application means that the direction from the shell of the main oil conservator to the inside of the capsule is inside, and vice versa, for the opening and changing integrated machine per se; and not as a specific limitation on the mechanism of the device of the present application.

The term "connected" as used herein may mean either a direct connection between components or an indirect connection between components via other components.

The meaning of "up and down" in this application means that the direction from the ground towards the top of the capsule lifting seat is up, whereas down, when the user is facing the transformer, and is not a specific limitation of the device mechanism of the present application.

Fig. 1 and fig. 2 show a switchback machine according to the present application, which includes:

the high-voltage outlet end of the main transformer 9 needs to be directly connected with the GIS equipment through a gas insulated GIL pipeline, and a high-voltage oil-SF 6 sleeve connected with the GIL pipeline generally needs to be led out from one side of an oil conservator of the main transformer together. The main transformer main structure is considered to be rectangular, the length dimension of the main transformer main structure is generally matched with the width dimension of an installation site, and therefore the main transformer 9 is preferably attached to the narrow side of the installation site and arranged on one side of the site, and the arrangement and installation of GIS equipment are achieved by utilizing the remaining complete rectangular space in the long edge direction of the installation site. In order to match with the arrangement mode, a high-voltage outgoing line can be arranged on the long side of the main transformer main body structure, so that the high-voltage outgoing line can be directly connected with GIS equipment arranged on the side of the main transformer outwards, the height of the high-voltage outgoing line end of the main transformer is reduced, and the arrangement distance of GIL pipelines is shortened;

the high-pressure oil-SF 6 sleeves 93 are respectively connected with one phase of a high-pressure outlet wire of the main transformer, each phase of high-pressure oil-SF 6 sleeve 93 is respectively horizontally arranged at the top of one side of the transformer box along the length direction of the main body structure of the transformer, and the height of each high-pressure oil-SF 6 sleeve 93 is lower than that of the main body structure of the main transformer 9; the neutral point of the main transformer 9 may also be grounded through a gas-insulated neutral point grounding device filled with SF 6; the low-voltage sleeve of the main transformer 9 can be realized by a cable plug type sleeve;

a gas insulation sleeve 94, which can selectively adopt a closed GIL hard pipeline shown in FIG. 5, one end of which is fixedly connected with a high-pressure oil-SF 6 sleeve 93, and the other end of which is fixedly connected with a GIS device, generally, in order to be matched with the outlet structure of the high-pressure oil-SF 6 sleeve 93 of the transformer of the present application, the gas insulation sleeve 94 can be arranged at the lower side of the outlet structure of the high-pressure oil-SF 6 sleeve 93, and is connected between the transformer and the GIS device by utilizing the lower space of the high-pressure oil-SF 6 sleeve 93;

the GIS device is arranged to comprise the following components shown in FIG. 16: GIL line 94, circuit breaker 954 (CB), disconnecting ground switch assembly DES, quick ground switch (FES), voltage transformer 957 (PT), current transformer 953 (CT), surge arrester 956 (LA), etc., which are organically combined by a plurality of sets of mounting chassis 959 and gas-insulated bushings connecting the various electrical components. The GIS equipment described above can be horizontally arranged on the side of the high pressure oil-SF 6 casing 93 parallel to the length direction of the main transformer 9 by means of several sets of mounting undercarriages 959. The electrical components on each group of mounting underframe 959 are connected in series by GIL hard tubes and arranged in parallel along the length direction of the high-pressure oil-SF 6 casing 93. And the electrical elements arranged in each group of mounting underframe 959 are sequentially connected in series with the high-pressure oil-SF 6 sleeve 93 through the steering structure. The electrical components arranged on each set of mounting chassis 959 do not have fixed arrangement requirements and can be arranged in any manner as long as GIS device functions can be achieved. Under some implementations, in order to compress the space, the application can arrange the circuit breaker horizontally to move towards and the installation place phase-match with the GIS pipeline on the installation chassis 959. For example, GIS equipment can set up the trend of its pipeline and main transformer and the outer limit size phase-match in installation place, with main transformer integrated design, prefabricated formula production of mill and modularization installation, overall appearance arranges compacter reasonable. When the inner central conductor of the GIS equipment is directly connected with a high-pressure oil-SF 6 sleeve of a main transformer, a displacement adjusting device can be designed at the joint of the inner central conductor so as to facilitate installation and prevent displacement damage in the transportation process, and a shielding ring is arranged at the joint of the conductors so as to reduce the electric field intensity on the surface of the conductors at the joint. Displacement adjusting devices are arranged at the external pipeline connection positions in the corresponding directions of the two ends of the three-phase separation sleeve body 9512 so as to facilitate installation and prevent damage caused by displacement in the transportation process. It can be specifically realized by the structure shown in fig. 16: firstly, a high-voltage oil-SF 6 sleeve 93 at the rear end of the transformer main body is connected with a horizontally arranged gas insulation sleeve 94, and a space below the outer side of the oil tank box of the gas insulation sleeve 94 is utilized to convert a transformer high-voltage signal into a horizontal direction through a gas-insulated three-phase converging sleeve body 94 and lead the signal out to the front side of the oil tank to a GIS circuit. The top 90-degree turning position of the three-phase converging casing 9511 can be connected with a horizontally arranged sealed corrugated pipe shell to be used as a displacement adjusting device to realize the adjustment of horizontal displacement, the tail end of the horizontally arranged displacement adjusting device is connected with an isolating switch assembly 958, and the tail end of the isolating switch assembly 958 is further connected with another sealed corrugated pipe shell in a vertical mode to be used as a vertical displacement adjusting device, so that a high-voltage signal output by the transformer main body is transmitted to a horizontal circuit breaker operating mechanism 955 to control the on-off of the high-voltage signal. The circuit breaker actuator 955 is horizontally fixed at the bottom of the installation chassis 959, the space above the circuit breaker actuator can be further utilized for installing a vertically arranged current transformer 953, and a grounding switch 9582 or a disconnecting switch assembly 958 horizontally connected to the top end of the current transformer 953, the tail end of the grounding switch is horizontally led out backwards and connected with another horizontally arranged three-phase converging sleeve body 9511, and the three-phase converging sleeve body 9511 is connected with a three-phase separating sleeve body 9512 at the side part of the next installation chassis, so that reliable electric connection of electric elements on different chassis is realized. On the next chassis, a breaker 954, a disconnector assembly 958, a telescopic joint 952, etc. may be correspondingly disposed, and finally, an overcurrent protection may be achieved through the disconnector assembly 958, the voltage transformer 957, the lightning arrester 956, etc. vertically disposed at the bottom of the gas insulated bushing 94 at the end of the chassis. From this, the direction of the pipeline of the whole GIS equipment can be matched with the outer limit size of main transformer and installation site, and the installation and transportation are convenient.

Generally, in order to further ensure that the main transformer and the GIS equipment are reliably connected and cannot be damaged due to displacement deviation in the transportation process, a displacement adjusting device realized by a telescopic corrugated pipe shell can be generally placed between the connection part of the main transformer and the GIS equipment so as to provide longitudinal or transverse deviation and steering space.

The oil conservator is arranged on the main transformer in a transverse mode by arranging the outer shell with a flat octagonal cross section shape so as to further reduce the height of the main structure of the transformer, insulating oil is stored inside the flat octagonal prism outer shell, the top of the insulating oil is sealed by the capsule, the oil conservator can be arranged on the top of the main structure of the main transformer 9 through a fixed mounting frame, a main air guide pipe can be arranged between the oil conservator and the main transformer 9 mounting gap, and a pressure adjusting channel communicated with the inside of the oil conservator can be matched with the main transformer outer box and horizontally extends to the edge of the side wall of the main transformer 9 and then bends downwards to the lower part of the side wall of the main transformer 9;

and a wind cooler 92 disposed on the other side end surface of the main structure of the main transformer 9 for reducing the temperature of the insulating oil in the main transformer 9, the upper connection pipe of which is horizontally led out to reduce the height space. The air cooler 92 of the present application eliminates the manifold commonly used for external connection of the cooler to reduce the width space, the external manifold is replaced by a lower clip manifold pipe 922 at the lower clip inside the oil tank in the manner shown in fig. 13 and 14, and the lower clip manifold pipe is connected to the air cooler oil inlet pipe 921 from the bottom of the oil tank, and does not occupy the whole space. Compared with the conventional cooling mode of suspending the plate radiator on the tank wall as shown on the left side of fig. 15, the conventional cooling mode needs to occupy a larger width space or needs to be led out in a split manner to occupy a larger length space, and cannot meet the requirement of the high-voltage power transformation vehicle on the limitation of the transportation size. This application cancels the radiator with figure 15 right side mode and leads oil pipe 923 through the inside lower folder department U type of oil tank and will descend the folder to gather the insulating oil direct introduction air cooler 92 in the oil pipe after cooling down, and the outside usable space of oil tank is more spacious in this application, is favorable to the installation of outside subassembly.

From this, the all-in-one that opens and becomes that realizes through the above-mentioned mode, its main transformer is adjustable suitable copper iron proportion and ware body size when calculating the electromagnetism scheme, space size and GIS hard tube connection structure in the strict control oil tank when cooperation structural arrangement, GIS optimizes the pipeline trend, can guarantee that the total overall dimension control after main transformer and the GIS erection joint that this scheme provided is in rectangle installation site within range, the inside space compact who can less equipment room clearance make full use of whole installation site arranges, installation substation equipment, realize the large capacity with less installation space, high reliability transformation output.

Referring specifically to fig. 2 and 3, in order to reduce the total width of the oil tank and shorten the internal space distance between the high-pressure side of the coil and the wall of the oil tank, the present application may include: three-phase coil, and the three-phase high voltage lead-out wire that matches with three-phase coil. The three-phase coils can be sequentially arranged along the length direction of the main structure of the main transformer 9; and the three-phase high-voltage lead-out wires are respectively connected with the three-phase coils, are vertically led out upwards and then horizontally bent outwards to be connected to each phase of high-pressure oil-SF 6 sleeve 93, and are horizontally led out from the high-pressure oil-SF 6 sleeve 93, so that each high-pressure oil-SF 6 sleeve 93 and the fixed connecting end of the main transformer are horizontally and outwards connected. Therefore, the main transformer can shorten the internal space distance between the high-pressure side of the coil inside the main transformer and the width direction of the oil tank wall, the high-pressure outlet head is led out vertically and upwards firstly, and then led out to the side wall of the oil tank after being bent horizontally and then led out to the wiring mode of the wiring terminal of the high-pressure oil-SF 6 sleeve directly, the internal electrical distance can be ensured, and the stable operation of the transformer can be further ensured by matching with the arrangement position of the high-pressure oil-SF 6 sleeve.

In the present application, compared to the vertical wire-out mode shown in the left side of fig. 3, the high-pressure oil-SF 6 bushing 93 can avoid the bulge structure marked by the virtual coil formed at the bottom of the high-pressure oil-SF 6 bushing 93 for ensuring the insulation distance inside the device in the vertical wire-out mode. Under the scheme that the high-pressure oil-SF 6 sleeves 93 are led out horizontally and outwards from the top of the connecting platform, the high-pressure outlet wire of the main transformer can be directly bent in the main structural box body of the transformer, so that the pipeline butt joint is realized in the direction directly matched with the GIL pipeline, and the steering matching structure between equipment is simplified. The lower side of the high-pressure oil-SF 6 casing 93 which horizontally extends out can be provided with a support strip which is connected with the outer side of the main transformer box body, and an auxiliary support is provided by a support strip structure which is obliquely arranged, so that the stability of the connection part between the devices is ensured.

Therefore, the switch all-in-one machine can directly connect the high-voltage outgoing line of the main transformer with the GIS equipment through the GIL pipeline and integrate the high-voltage outgoing line with the GIS equipment, so that the main transformer and the GIS equipment are organically combined into a whole. Through the optimized layout of the main transformer internal circuit and the external box structure, the three-phase oil-SF 6 sleeve led out from the high-pressure side, the oil-SF 6 sleeve led out from the neutral point side, the cable plug-in type sleeve led out from the low-pressure side, the special short octagonal or long circular oil conservator matched with the main transformer box, the cooler arranged on the side face and other parts, the GIS equipment, the main transformer and the GIL pipeline connecting the two can be arranged in a size matched with an installation site, so that the transportation cost is reduced, and the requirement on the installation site is met.

Under other implementation modes, the switching all-in-one machine can also utilize a plurality of groups of installation bottom frames to horizontally arrange various electrical elements required by GIS equipment on each group of installation bottom frames according to the installation size requirement, and then the transformer main body and each group of electrical elements are connected in a mode of a figure 2 or a figure 4 through a GIL pipeline with a steering structure, so that the complete switching all-in-one machine is formed. Wherein, each group of mounting underframe is provided with electric elements which are respectively matched with three phases of the main transformer 9 in parallel; the steering structure connected between the main transformer and each set of GIS equipment comprises:

the three-phase confluence bushing body 9511, which is parallel to the main transformer 9 and the mounting base 959, is installed between them by using a space under the bushing 93 of high pressure oil-SF 6. The top of the three-phase confluence bushing body 9511 is provided with three bushing connection ports, each bushing connection port is electrically connected with a high-pressure oil-SF 6 bushing 93 of a corresponding phase through a phase gas insulation bushing 94, conductors respectively matched with the three bushing connection ports are arranged in parallel in the three-phase confluence bushing body 9511 in a mode shown in figure 5, the conductors are fixedly connected through insulation connecting pieces, and each conductor is electrically connected with a phase high-pressure oil-SF 6 bushing 93;

the structure of the steering sleeve is shown on the right side of fig. 5, the first end of the sleeve is connected with one side of a three-phase confluence sleeve body 9511 and is in butt joint with each phase of electric conductors of the three-phase confluence sleeve body 9511, three groups of 90-degree steering conductors which are parallel to each other are arranged inside the steering sleeve at intervals, and each 90-degree steering conductor is electrically connected with one phase of electric conductors in the three-phase confluence sleeve body 9511 respectively;

a three-phase separation sleeve 9512 parallel to the high-voltage oil-SF 6 sleeve 93 and connected to the second end of the steering sleeve or arranged on one side of an electrical element on the mounting base frame 959, wherein three element connection ports are arranged on the side of the three-phase separation sleeve 9512, each element connection port is electrically connected to one phase of electrical element on the mounting base frame 959, inner conductors respectively matched with the three-phase element connection ports are arranged in parallel inside the three-phase separation sleeve 9512, the inner conductors are fixedly connected by insulating connectors, and each inner conductor is electrically connected to one phase of steering conductor;

and the inter-group telescopic connecting sleeves 9513 are connected between three-phase separating sleeve bodies 9512 arranged at the side parts of two adjacent mounting underframe 959 and are respectively connected with the inner conductors of each phase in the three-phase separating sleeve bodies 9512 in series.

Therefore, a high-voltage signal output by the high-pressure oil-SF 6 bushing 93 is transmitted to one side of the mounting base frame 959 along the length direction of the transformer body through the three-phase converging bushing body 9511, then is turned to the connecting direction of the electrical elements on the mounting base frame 959 through the turning bushing, and is respectively butted with the electrical elements of each phase through the three-phase separating bushing body 9512, so that the regulation and control of the high-voltage output signal are realized. The second set of mounting chassis 959 also provides electrical connections to the electrical components within the upper set of mounting chassis 959 through the three-phase split sleeve 9512 so that high voltage signals are transmitted and controlled in a zig-zag fashion between the electrical components provided by each set of mounting chassis 959.

Compared with the conventional GIS equipment, the GIS equipment is optimized in the following aspects:

1. an SF 6-air sleeve which is led out at intervals from a main transformer of the original GIS equipment and is connected with a high-voltage outgoing line of the main transformer is eliminated.

2. The flexible overhead line for connecting the main transformer and the GIS equipment is replaced by a closed GIL hard pipeline, the section of GIL pipeline is controlled to be connected with the main transformer of the GIS equipment at intervals, a pipeline outer shell 942 in fig. 4 is arranged, the sizes of an inner central conductor 941 and a disc insulator at a pipeline joint are matched with the size of the GIS, a displacement adjusting device can be designed at the joint of the inner central conductor 941 to facilitate field installation, and a shielding ring can be optionally designed at the conductor joint to reduce the electric field intensity at the joint. Therefore, after the connection is completed, the GIL pipeline can be integrated with the GIS equipment.

3. The connecting interface of a main transformer and GIS equipment is designed integrally, displacement adjusting and compensating devices are designed on a central conductor and an external pipeline connecting structure in the GIL, corrugated pipes are arranged on external pipelines at the direct connecting position of a GIS equipment external pipeline shell and a main transformer high-pressure oil-SF 6 sleeve in the height direction and the horizontal direction respectively to serve as displacement adjusting devices, the connecting position can be adjusted on the site conveniently, and the main transformer and the GIS equipment can be installed and connected more safely and reliably.

4. When the main transformer and the GIS equipment are integrally designed and arranged, the GIS equipment and the main transformer are more coordinately matched due to the integral design and the trend of GIS equipment pipelines, the overall appearance arrangement is more compact and reasonable, and the inspection and maintenance are more convenient.

Therefore, the obtained GIS equipment can be matched with a main transformer with the following improved outgoing line mode to realize the compression of the integral assembly space of the split-type transformer all-in-one machine:

1. the low-voltage side wire outlet connection mode is changed from the connection of a conventional pure magnetic sleeve and a cable into the mode of leading out the cable through a cable plug type sleeve.

2. The outlet connection mode of the high-voltage side is changed from the conventional overhead line leading-out to be sealed in the GIL pipeline.

3. The connection mode of the outgoing line at the neutral point side is changed from the conventional overhead line leading-out into the closed neutral point grounding device in the pipeline of the neutral point grounding device, the original open-type connected neutral point grounding device is changed into the closed neutral point grounding device shown in fig. 11 and/or 12, the closed neutral point grounding device is directly installed on a neutral point lifting seat of a main transformer horizontally led out from the upper part of the box wall at the switch side, the oil-SF 6 sleeve horizontally installed is used as a neutral point sleeve, the closed neutral point grounding device is directly installed on the neutral point lifting seat, the central conductor inside the closed neutral point grounding device is directly connected with the neutral point oil-SF 6 sleeve, and the closed neutral point grounding device and the main transformer are integrated into a whole so as to efficiently save the length space.

Specifically, the gas-insulated neutral grounding device, in which the transformer neutral is connected, may include: a lightning arrester, a disconnector or a discharge gap, or a combination of the above.

As shown in fig. 11, the isolating switch 911 may be further specifically configured to include:

a first metal case 9111, which realizes a discharge path closely and commonly grounded with a gas insulation tube at the top of the main transformer through flange structures at the top and the bottom and a metal cylinder or a conductive socket electrically connected between the two flange structures;

the fixed contact 9112 is arranged in a gas insulation tube shell at the top of the main transformer and is electrically connected with a neutral point of the transformer through a common end conductor inner core;

the upper part of the moving contact 9113 is in sliding electrical connection with the first metal shell 9111 through a moving contact base made of a conductive material, the bottom end of the moving contact 9111 is in electrical contact with the fixed contact when the moving contact 9111 slides to the bottom of the first metal shell 9111, and the bottom end of the moving contact 9111 is separated from the fixed contact when the moving contact 9111 slides to the top of the first metal shell 9111, so that a grounding current path is formed in the moving contact;

switch induction coil 9114, it sets up in the periphery of moving contact 9113 and is located the inside of first metal casing 9111, the moving contact is passed in switch induction coil 9114 center department, the inboard fixed knot of switch induction coil 9114 constructs the accessible insulated connecting piece and blocks the current path of turning back downwards by flange or moving contact seat and forms the insulating air chamber that surrounds the moving, the static contact at switch induction coil 9114 inboard, utilize insulating air chamber to shorten insulation distance, and form the backward flow route through first metal casing 9111 periphery with the one-way guide of grounding current in the moving contact 9113 to the coil outside. Therefore, the induction coil can only induce the one-way grounding current passing through the internal moving contact 9113, and can accurately detect the grounding current.

In close proximity thereto, as shown with reference to fig. 12, the discharge gap 912 of the present application may also be configured to include:

a second metal shell 9121 formed by upper and lower flanges, sleeves or socket bars, which is hermetically connected with the gas insulation pipe shell at the top of the main transformer and is commonly grounded, and at least part of the inner area of the second metal shell is filled with SF6 to provide gas insulation for the central point of the transformer;

the upper part of the conducting rod 9122 is in sliding electrical connection with the top of the second metal shell through a mounting seat, is positioned in a gas insulation tube shell filled with SF6 gas, and the bottom of the conducting rod 9122 is fixedly and electrically connected with a movable side ball head 9123;

gap induction coil 9124, its setting is in conducting rod 9122's periphery and is located the inside of second metal casing, and it passes through flange, sleeve, inserts the ground connection backward flow electric path drainage ground connection backward flow that is located the coil periphery that row and mount pad constitute, avoids backward flow signal anti-phase to pass through the inside influence coil degree of accuracy of coil. The grounding current which is discharged through breakdown of the ball head and passes through the conducting rod 9122 in a single direction can be detected through the electromagnetic induction of the coil;

therefore, in the discharge gap 912, the static side bulb 9125 which is matched with the dynamic side bulb to realize gap discharge can be only fixedly arranged in a gas insulation tube shell at the top of the main transformer and is electrically connected with a neutral point of the transformer, namely, the gap distance between the two bulbs can be changed through the movement of the dynamic side bulb, an SF6 gas medium is punctured when the gap distance between the two bulbs reaches the puncture distance in an SF6 gas environment, and discharge is carried out between the two bulbs and the two bulbs passes through grounding current;

the moving-side ball head 9123 needs to be arranged in the second metal shell and is kept above the static-side ball head 9125, and insulating gas can be filled between the moving-side ball head 9123 and the static-side ball head 9125 through the sealing of the second metal shell or through the sealing of an insulating and shielding structure in the shell;

when the conducting rod 9122 slides to the top position of the second metal shell, the movable-side ball head 9123 and the static-side ball head 9125 are insulated;

when the conducting rod slides to the bottom of the second metal shell, an insulating gas gap is punctured between the movable-side ball head 9123 and the static-side ball head 9125 for discharging.

Referring to fig. 6 to 10, the oil conservator can be further arranged in the following manner so as to save the materials required by the switch oil conservator, ensure the regular internal structure of the main oil conservator and facilitate the sealing of the capsule. In order to facilitate the maintenance of the oil conservator by an operator, the breathing channel of the main oil conservator, the vacuumizing channel and the switch cabinet breathing channel of the switch oil conservator can be further extended to the lower part of the side wall of the main transformer along the outer side of the main transformer body, and all the respirators and valve structures at the tail end of the channel are ensured to be positioned at the height position close to the maintainer. From this, this application can separate independent design with transformer oil conservator and switch oil conservator, makes things convenient for the maintainer to operate and compress the shared volume of oil conservator, with transformer integration to accord with the installation space requirement:

the main oil conservator 1 is provided with a flat polygonal prism structure, an inflatable capsule 10 is hung on the top of the main oil conservator through a hook structure shown in fig. 8, for the convenience of installation, a hand hole can be further formed on the top of the main oil conservator near the hook, sealing is realized through a hand hole cover plate with an electric laminated wood 33 shown in fig. 10, and air pocket is avoided through the electric laminated wood on the back of the cover plate;

the switch oil conservator 7 is arranged on one side end face of the main oil conservator 1 and is independent of the main oil conservator 1;

the main air pipe is arranged in an installation gap between the main oil conservator 1 and the main transformer 9, one end of the main air pipe is connected with the bottom of the main oil conservator 1, the other end of the main air pipe is connected with the main transformer 9, the main air pipe has a gradient which is inclined upwards by a transformer main body box cover 9 by not less than 2 degrees, so that gas escaping upwards from the oil tank is easy to accumulate into the gas relay through the main air pipe;

the capsule lifting seat 2 is arranged at the top end of the main oil conservator 1, is fixedly connected with the top of the capsule 10, and forms a gas containing cavity between the top of the capsule and the top end of the capsule lifting seat 2 in a sealing way;

a breathing passage which is communicated with the inside of the capsule 10 through the capsule lifting seat 2 and extends from the capsule lifting seat 2 to the lower part of the side wall of the main transformer 9 to adjust the breathing state of the capsule 10;

and the vacuumizing channel is communicated with the gas containing cavity, extends from the top of the capsule lifting seat 2 to the lower part of the side wall of the main transformer 9 and is used for adjusting the gas pressure in the gas containing cavity.

The capsule elevation seat 2 at the middle position of the top of the conservator structure can be further arranged in the way of fig. 7 to comprise:

a lifting seat main body which is connected with the top end of the main oil conservator 1 and is provided with an opening at the top;

a capsule elevation seat cover plate 22, hermetically connected with the elevation seat body, closing the opening;

the capsule connecting flange 20 is connected with the capsule lifting seat cover plate 22 in a sealing mode at the top, is arranged at the bottom and is connected with the top of the capsule 10 in a sealing mode, and is internally provided with a flange channel communicated with the inside of the capsule 10.

Therefore, the bottom of the respirator pipe joint 21 can be connected with the capsule lifting seat cover plate 22 into a whole, and the top of the respirator pipe joint is connected with a breathing channel; the main oil conservator air release plug 23 can be arranged on the capsule lifting seat cover plate 22 and is communicated with the vacuumizing channel and the gas containing cavity; and between capsule lifting seat apron 22 and capsule flange 20, set up first sealing washer 201 and second sealing washer 202 between capsule lifting seat apron 22 and the lifting seat main part respectively, through set up the leakproofness when the capsule breathes in the double-deck seal structure that first sealing washer 201 outside formed with second sealing washer 202 encirclement, make capsule lifting seat department be difficult for gathering the inside gas that gets into of oil storage cabinet because seal not tight.

The switch oil conservator that the above-mentioned main oil conservator outside independently set up specifically accessible again the structure shown in fig. 9, connect the switch cabinet breathing channel who is independent of main oil conservator 1, and switch oil conservator bleeder cock 71 to the switch oil conservator that sets up alone through the drum structure reduces the oil tank material quantity, reduces the volume space that the switch oil conservator occupied, moves the position of switch oil conservator according to the position that has the switch skull, conveniently has the maintenance of load switch. In fig. 6, the connection mode that the switch oil conservator is directly welded on the end cover plate can also enhance the structural strength of the end cover plate of the main oil conservator.

Correspondingly, the breathing passage of the switch cabinet in the present application may be specifically configured to include the following components as shown in fig. 9:

a breather connecting pipe 72 which extends upwards from the bottom of the switch oil conservator 7 to the top end of the interior of the switch oil conservator 7;

the switch oil conservator breather 8 is connected with the tail end of the breather connecting pipe 72 and is arranged at the outer side of the lower part of the main transformer 9 together with the breather and the valve of the main transformer so as to be convenient for the maintenance of operators;

the switch oil conservator air release plug 71 can be directly arranged at the top end of the switch oil conservator 7 and positioned above the breather connecting pipe 72, so that air can be conveniently exhausted;

and the switch cabinet breathing channel is connected and conducted with the breathing channel and the vacuumizing channel connected with the main oil storage cabinet through the horizontally arranged pressure balance valve, so that the synchronous vacuumizing is realized, and the load switch connected with the switch oil storage cabinet 7 and the transformer main body are kept in a pressure balance state in the vacuumizing process.

In addition, inside this application division becomes all-in-one, the sleeve pipe between main transformer and the GIS equipment and be qualified for the next round of competitions all adopt the insulating mode of GIL hard tube to realize, and accessible GIL shell pipeline reliably grounds, can not receive natural environment's influence completely, patrols and examines and maintain for making daily electrified and provide the safety guarantee, and convenient.

The trend of the GIS equipment pipeline that this application adopted can set up to the appearance phase-match with the main transformer, the design of wholeness and the trend of planning the appearance of main transformer and GIS pipeline, make both more coordinate the matching, it is compacter reasonable to make the overall appearance of transformer substation arrange, the geographic space who occupies has reduced, the land area has been practiced thrift, and corresponding reduction civil engineering work volume, the actual construction cost can reduce, not only can solve the scarce difficult problem of land resource when some transformer substation construct now, also accord with the development trend of the resource-saving society of current construction sustainable development.

The main transformer and GIS equipment integrated design, the connection interface of main transformer and GIS equipment of wholeness design, inside center conductor and external piping connection have all designed displacement compensation device, and the prefabricated formula production of mill makes the connection of main transformer and GIS equipment simpler, and the installation can be simplified to on-the-spot modularization installation to make the whole appearance of opening and change all-in-one arrange compacter, reasonable, reliable.

In summary, the present application provides two primary devices: the main transformer and the GIS are integrated, the appearance of the main transformer and the trend of a GIS equipment pipeline are integrally designed and planned, the high voltage of the main transformer is directly connected with the GIS equipment through a closed gas insulated bushing (GIL pipeline) hard pipeline, the GIS equipment and the main transformer can be more coordinately matched through the optimization measures, the overall appearance arrangement is more compact and reasonable, the requirement of external electrical insulation distance during live-line operation is not required to be considered, and the daily installation, inspection and maintenance are more convenient. Therefore, the general integration degree of the opening and transformation all-in-one machine is higher, the power grid can be flexibly and reliably accessed, and the main transformer and the GIS equipment can be compactly installed in an arrangement site in a mode shown in figure 4. When the high voltage of the main transformer is directly and hermetically connected with the GIS equipment, only one oil-SF 6 sleeve needs to be led out from the high voltage rising seat of the main transformer in each phase, and the sleeve does not need to be led out from the connecting outlet of the main transformer interval and the main transformer of the GIS equipment. In the traditional connection mode of the flexible overhead line, an oil-air sleeve needs to be installed on each phase of the high-voltage lifting seat of the main transformer, and an SF 6-air sleeve needs to be installed on each phase of the connection outlet of the main transformer interval of the GIS equipment and the main transformer. Compared with the traditional soft overhead line connection mode, the direct closed connection mode of the main transformer and the GIS equipment enables the number of three-phase sleeves to be changed from 6 to 3 when each main transformer and the main transformer of the GIS equipment are connected at intervals, can save the total number of sleeves and cost, and particularly has better economic benefit when the number of the main transformers of the transformer substation is more compared with the traditional technology, and the novel technology has the following advantages:

the main transformer and GIS equipment integrated design, factory prefabricated production, on-site modularization installation, overall appearance arranges compacter reasonable. In this application, all set up when all sleeve pipes and binding post, the lead-out wire live working between main transformer and GIS equipment and all set up external insulation or reliably ground through GIL shell pipeline, the connection form of full insulation can not receive natural climate environment's influence completely, very big increase the factor of safety when transformer substation moves, can satisfy the demand to the customer that the fail safe nature requires high, need not to consider the outside electrical insulation distance requirement when live working, daily electrified patrol and examine and maintain safer convenient and fast.

This application is through carrying out a series of optimizations to main transformer oil tank internal design and interior dead length, and to the optimization of oil conservator and cooler appearance and mounted position, the overall dimension of large capacity main transformer has been reduced by a wide margin, including the optimization to GIS equipment pipeline trend, can further compress the length space of GIS equipment, when arranging main transformer and GIS equipment integration design, but the design of wholeness and the appearance of planning main transformer and the trend of GIS equipment pipeline, make GIS equipment and main transformer both more coordinate the matching through above-mentioned some optimization measures, the overall appearance is arranged compactlyr rationally, make both general overall dimension satisfy the project requirement that realizes the intensive installation of open limit all-in-one machine with the shorter rectangle place in long limit after the integration, reduce the occupation of land space of high-pressure outdoor transformer substation by a wide margin.

The above are merely embodiments of the present application, and the description is specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the protection scope of the present application.

Claims

1. An opening and changing all-in-one machine is characterized by comprising:

the main transformer (9) comprises a main body structure and high-pressure oil-SF 6 sleeves (93), each high-pressure oil-SF 6 sleeve (93) is connected with one phase of a high-pressure outlet wire of the main transformer, each phase of high-pressure oil-SF 6 sleeve (93) is horizontally arranged at the top of one side of the main body structure along the length direction of the main body structure, and the height of each high-pressure oil-SF 6 sleeve (93) is lower than that of the main body structure of the main transformer (9);

one end of the gas insulation sleeve (94) is fixedly connected with the high-pressure oil-SF 6 sleeve (93), and the other end of the gas insulation sleeve is fixedly connected with the GIS equipment;

the GIS equipment comprises a plurality of groups of installation underframe (959) which are horizontally arranged on one side of a high-pressure oil-SF 6 sleeve (93) in parallel to the length direction of the main transformer (9) and electrical elements arranged on the (959), wherein the installation underframe (959) groups are sequentially arranged in parallel along the length direction of the high-pressure oil-SF 6 sleeve (93), and the electrical elements arranged on the installation underframe (959) groups are sequentially connected with the high-pressure oil-SF 6 sleeve (93) in series through a steering structure;

the oil conservator is internally stored with insulating oil, is fixedly arranged at the top of the main structure of the main transformer (9), is provided with a main air guide pipe arranged between the oil conservator and the installation gap of the main transformer (9), and a pressure adjusting channel communicated with the inside of the oil conservator, and extends horizontally from the top of the oil conservator to the edge of the side wall of the main transformer (9) and then bends downwards to the lower part of the side wall of the main transformer (9);

and the air cooler (92) is arranged on the other side end face of the main structure of the main transformer (9), and insulating oil of the coil is directly introduced into the air cooler (92) through an oil guide pipe of the main transformer so as to reduce the temperature of the insulating oil in the main transformer (9).

2. A switchyard machine according to claim 1, characterized in that each group of mounting undercarriages is provided side by side with electrical components adapted to the three phases of the main transformer (9);

the steering structure includes:

the three-phase converging sleeve body (9511) is parallel to the main transformer (9) and the mounting underframe (959) and is arranged between the main transformer and the mounting underframe, the top of the three-phase converging sleeve body (9511) is provided with three sleeve connection ports, each sleeve connection port is electrically connected with a high-pressure oil-SF 6 sleeve (93) of the corresponding phase through a phase gas insulation sleeve (94), the inside of the three-phase converging sleeve body (9511) is provided with electric conductors which are matched with the three sleeve connection ports respectively in parallel, the electric conductors are fixedly connected through insulation connecting pieces, and the electric conductors are electrically connected with a phase high-pressure oil-SF 6 sleeve (93) respectively;

the first end of the steering sleeve is connected with one side of the three-phase confluence sleeve body (9511), three groups of 90-degree steering conductors which are parallel to each other are arranged inside the steering sleeve at intervals, and each 90-degree steering conductor is electrically connected with one phase of electric conductor in the three-phase confluence sleeve body (9511) respectively;

a three-phase separation sleeve body (9512) which is parallel to the high-pressure oil-SF 6 sleeve (93) and connected to the second end of the steering sleeve or arranged on one side of an electric element on an installation underframe (959), wherein three element connection ports are arranged on the side part of the three-phase separation sleeve body (9512), each element connection port is electrically connected with one phase of electric element on the installation underframe (959), inner conductors which are respectively matched with the three-phase element connection ports are arranged in parallel inside the three-phase separation sleeve body (9512), the inner conductors are fixedly connected by an insulating connector, and each inner conductor is electrically connected with one phase of steering conductor;

and the inter-group telescopic connecting sleeves (9513) are connected between three-phase separating sleeve bodies (9512) arranged at the side parts of two adjacent mounting underframe (959) and are respectively connected with the inner conductors of each phase in the three-phase separating sleeve bodies (9512) in series.

3. A switchyard integrating machine according to claim 1, wherein inside said main transformer (9) there are provided:

three-phase coils, which are arranged in sequence along the length direction of the main structure of the main transformer (9);

the three-phase high-voltage outgoing lines are respectively connected with the three-phase coils, the three-phase high-voltage outgoing lines are respectively upwards led out to the top of the same side of the main body structure of the main transformer, then the three-phase high-voltage outgoing lines are respectively bent outwards horizontally at the top of the main transformer and are connected to a phase high-pressure oil-SF 6 sleeve (93), and the three-phase high-voltage outgoing lines are led out horizontally outwards from the high-pressure oil-SF 6 sleeve (93).

4. The integrated switchgear according to claim 2, wherein the high pressure oil-SF 6 bushings (93) of each phase are horizontally connected to the gas insulation bushings (94) matching the phase, and the lower side of the high pressure oil-SF 6 bushings (93) of each phase are provided with support bars supported outside the main transformer (9) tank.

5. The all-in-one machine of claim 2, wherein the neutral point of the main transformer (9) is grounded through a gas-insulated neutral point grounding device, and a low-voltage bushing of the main transformer (9) adopts a cable plug type bushing.

6. The switchyard machine according to claim 4, wherein said gas insulated neutral grounding means comprises, connected in parallel between the main transformer neutral and ground level:

a lightning arrester, a disconnector and/or a discharge gap.

7. The switchplexer as claimed in claim 5, wherein the disconnector (911) comprises:

a first metal housing (9111) hermetically connected to a gas-insulated vessel at the top of the main transformer and commonly grounded;

the static contact (9112) is arranged in the gas insulation tube shell at the top of the main transformer and is electrically connected with a neutral point of the transformer;

the upper part of the movable contact (9113) is in sliding electrical connection with the first metal shell (9111), the bottom end of the movable contact (9111) is in electrical contact with the fixed contact when the movable contact slides to the bottom position of the first metal shell (9111), and the bottom end of the movable contact (9111) is separated from the fixed contact when the movable contact slides to the top position of the first metal shell (9111);

the switch induction coil (9114) is arranged on the periphery of the moving contact (9113) and is positioned in the first metal shell (9111), and the moving contact penetrates through the switch induction coil (9114) to trigger the grounding current which is passed by the switch induction coil (9114) to induce the moving contact (9113).

8. The switchplexer as claimed in claim 5, wherein said discharge gap (912) comprises:

a second metal housing (9121) hermetically connected to the gas-insulated vessel at the top of the main transformer and commonly grounded;

the upper part of the conducting rod (9122) is in sliding electrical connection with the top of the second metal shell, and the bottom of the conducting rod is fixedly and electrically connected with a moving-side ball head (9123);

the gap induction coil (9124) is arranged on the periphery of the conducting rod (9122) and located inside the second metal shell, and the conducting rod (9122) penetrates through the gap induction coil (9124) to trigger the gap induction coil (9124) to detect current in the conducting rod (9122);

the static side ball head (9125) is fixedly arranged in a gas insulation pipe shell at the top of the main transformer and is electrically connected with a neutral point of the transformer;

the movable-side ball head (9123) is positioned in the second metal shell and above the static-side ball head (9125), and insulating gas is filled between the movable-side ball head (9123) and the static-side ball head (9125);

when the conducting rod (9122) slides to the top position of the second metal shell, the movable-side ball head (9123) and the static-side ball head (9125) are insulated;

when the conducting rod slides to the bottom of the second metal shell, an insulating gas gap is punctured between the moving-side ball head (9123) and the static-side ball head (9125) for discharging.

9. The switchback integrator of claim 1, wherein the conservator comprises:

the main oil conservator (1) is of a flat polygonal prism structure, and a capsule (10) is contained in the main oil conservator;

the switch oil conservator (7) is arranged on one side end face of the main oil conservator (1) and is independent of the main oil conservator (1);

the main air pipe is arranged in a mounting gap between the main oil conservator (1) and the main transformer (9), one end of the main air pipe is connected with the bottom of the main oil conservator (1), the other end of the main air pipe is connected with the main transformer (9), and the main air pipe has a gradient which is inclined upwards by the main transformer tank cover (9) by not less than 2 degrees;

the capsule lifting seat (2) is arranged at the top end of the main oil storage cabinet (1), is fixedly connected with the top of the capsule (10), and forms a gas containing cavity between the top of the capsule and the top end of the capsule lifting seat (2) in a sealing manner;

the breathing channel is communicated with the interior of the capsule (10) through the capsule lifting seat (2), extends to the lower part of the side wall of the main transformer (9) from the capsule lifting seat (2) and regulates the breathing state of the capsule (10);

and the vacuumizing channel is communicated with the gas containing cavity, extends from the top of the capsule lifting seat (2) to the lower part of the side wall of the main transformer (9), and is used for adjusting the gas pressure in the gas containing cavity.

10. The switchplexer as claimed in claim 8, wherein said capsule lifting seat (2) comprises:

the lifting seat main body is connected with the top end of the main oil conservator (1), and the top of the lifting seat main body is provided with an opening;

a capsule elevation seat cover plate (22) hermetically connected with the elevation seat body, closing the opening;

the top of the capsule connecting flange (20) is hermetically connected with the capsule lifting seat cover plate (22), the bottom of the capsule connecting flange is hermetically connected with the top of the capsule (10), and a flange channel is arranged in the capsule connecting flange and communicated with the inside of the capsule (10);

the bottom of the respirator pipe joint (21) is connected with the capsule lifting seat cover plate (22) into a whole, and the top of the respirator pipe joint is connected with a breathing channel;

the main oil conservator air release plug (23) is arranged on the capsule lifting seat cover plate (22) and is communicated with the vacuumizing channel and the gas containing cavity;

wherein a first sealing ring (201) is arranged between the capsule lifting seat cover plate (22) and the capsule connecting flange (20);

a second sealing ring (202) is arranged between the capsule lifting seat cover plate (22) and the lifting seat main body;

the second seal ring (202) is disposed around the outside of the first seal ring (201).