CN109524218A - A kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber - Google Patents
A kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber Download PDFInfo
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- CN109524218A CN109524218A CN201910019852.8A CN201910019852A CN109524218A CN 109524218 A CN109524218 A CN 109524218A CN 201910019852 A CN201910019852 A CN 201910019852A CN 109524218 A CN109524218 A CN 109524218A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulators (AREA)
Abstract
The invention belongs to the electrical apparatus insulation structure design and optimization design fields of ultra-high/extra-high voltage AC and DC transmission facility, more particularly to a kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber, including gas insulated bushing, connect the isolation buffer gas chamber of gas insulated bushing and oil tank of transformer and the shading ring of cannula tip.The installation of isolation buffer gas chamber both ends is dielectrically separated from support.When inside pipe casing electric discharge, which causes casing side to be dielectrically separated from support, to be destroyed, isolation buffer gas chamber can play buffer function, prevent gas from entering inside transformer, transformer oil is stopped to enter failure inside pipe casing simultaneously, it reduces casing and the probability of burning and explosion occurs for transformer, promote the safety and reliability of casing and transformer.
Description
Technical field
The invention belongs to the electrical apparatus insulation structure design and optimization design field of ultra-high/extra-high voltage AC and DC transmission facility, tools
Body is related to a kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber.
Background technique
Casing failure is to cause the one of the major reasons of Causing Fire in Transformer, although fire occurs for transformer class casing
Probability is lower, but once often causes larger breaking-up to transformer because certain reason is on fire, or even causes neighbouring transformer and its
He damages electrical equipment, seriously endangers substation safety stable operation.In previous transformer fire accident case, casing is drawn
It is typical electric discharge source that insulator, which discharges, increases outgoing line device electric discharge in seat, under lever system electric discharge, casing, these positions are once
Insulation breakdown or flashover, the high energy arc for generation of discharging, which occurs, rises local oil temperature suddenly, forms oil vapour and crack out can
Combustion property gas (hydrogen, methane, ethane, ethylene, acetylene etc.), the pressure wave that bulk gas is formed will cause porcelain under oil impregnated paper bushing
Set explosion increases the rupture of seat sealing structure, and transformer oil is sprayed from casing flange or raising seat flange position, and encountering outside has
The fuel gas and oil vapour decomposed after oxygen environment can light and sustained combustion, causes fire development to expand, the intensity of a fire will be spread to
Other positions of transformer.As it can be seen that the synergy of insulation breakdown and mechanical defect may cause casing heavy explosion, generation it is huge
Big energy causes high risk fire, seriously affects the safety of electric system and by property.
Summary of the invention
The purpose of the present invention is to solve existing design there are the problem of, provide it is a kind of with buffer air chamber it is super/
The explosion-proof casing of extra-high voltage gas-insulated transformer class, the casing introduce isolation buffer gas chamber in the design, when inside pipe casing is put
When conductance causes the tapered insulator dielectric isolation support damage of casing side, then transformer side is dielectrically separated from support and can effectively stop
Transformer oil flows into gas chamber, while the gas in casing being stopped to enter inside transformer, and reduce arc ignition transformer oil can
Energy property is reduced because inside pipe casing electric discharge leads to the probability of casing and Explosion of Transformer, to improve ultra-high/extra-high voltage AC and DC set
The safety and reliability of pipe and transformer in operation.
In order to achieve the above objectives, the present invention adopts the following technical scheme that realization:
A kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber, including gas insulated bushing
And the power transformer enclosure being connected with transformer base part, the first end of power transformer enclosure are used to connect with transformer base part
It connects, the first end of power transformer enclosure, which is sealed and installed with, is dielectrically separated from support, is dielectrically separated between support and transformer base part
It is capable of forming transformer outlet grease chamber；The second end and gas insulated bushing of power transformer enclosure pass through flanged joint, transformer
It increases seat and gas insulated bushing and is sealed and installed with tapered insulator in junction, in power transformer enclosure inner cavity, be dielectrically separated from
Isolation buffer gas chamber is formed between support and tapered insulator；The casing major insulation of isolation buffer gas chamber and gas insulated bushing
Insulating gas is filled in gas chamber；
Be provided with center conductor in gas insulated bushing and power transformer enclosure, center conductor and tapered insulator and with
It is dielectrically separated between support and is tightly connected；Concentric cartridge type metallic shield electrode is housed inside gas insulated bushing；
The end of gas insulated bushing is equipped with shading ring.
The external insulation of gas insulated bushing is Hollow Compound/porcelain insulator.
The insulating gas is preferably SF6Insulating gas or other environment-friendly type insulated gases, such as CO2、N2, PFC gas,
CF3I gas, C4F7N gas or C5F10O gas etc..
Being dielectrically separated from support is disc insulator, board-like insulator, tapered insulator or insulated gate, these are dielectrically separated from branch
Support is to be dielectrically separated from support with insulation, sealing and mechanical support characteristics.
Concentric cartridge type metallic shield cartridge type electrode includes at least one set of high-field electrode and grounding electrode, grounding electrode and ground connection
Flanged joint, the both ends of high-field electrode are connected with each other and are consolidated by several insulating bars with end corresponding on grounding electrode respectively
It is fixed.
Air pressure in isolation buffer gas chamber is equal to the air pressure in gas insulated bushing.
The transformer base part is transformer, converter power transformer or reactor.
Compared with prior art, the invention has the following beneficial effects:
The present invention has the explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class of buffer air chamber, compared to traditional change
Depressor class casing has the following advantages: first generation transformer class casing is usually oil impregnated paper bushing, such casing is although in many years
It shows and stablizes in operation, but still there are problems that moisture-sensitive, easily leakage；On the other hand, when inside pipe casing discharges, set
Pipe is easy to happen explosion and forms extensive fire, causes greatly to threaten to the safe and stable operation of electric system.The second generation
Casing is resin impregnated paper bushing, such casing dielectric loss and partial discharge performance can match in excellence or beauty with oil impregnated paper bushing, while small in size, weight
Gently, the advantages that hydrophobicity is good, durability against pollution is strong, easy to maintain；However, the investment of such bushing installation is big, manufacturing cost is higher, to life
Production condition, manufacturing process etc. are more demanding；In addition, with the continuous promotion of transmission capacity, the fever and heat dissipation of glue stain paper bushing
Resolving probiems difficulty is larger.The explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber of the invention passes through
It tapered insulator and is dielectrically separated from support entire casing has been divided into transformer outlet grease chamber, isolation buffer gas chamber and casing master
Insulate gas chamber, fills insulating gas in the casing major insulation gas chamber of isolation buffer gas chamber and gas insulated bushing；First,
The casing has the characteristics that light-weight；Secondly, the casing introduces isolation buffer gas chamber in the design, when inside pipe casing electric discharge is led
Cause casing side tapered insulator damage when, then transformer side be dielectrically separated from support can effectively stop transformer oil flow into every
From in buffer air chamber, while the gas in casing being stopped to enter inside transformer, reducing arc ignition transformer oil leads to casing
A possibility that burning and explode with transformer reduces because inside pipe casing electric discharge leads to the probability of casing and Explosion of Transformer, thus
It improves ultra-high/extra-high voltage AC and DC casing and transformer safety and reliability in operation, therefore of the invention there is casing
High reliablity, the feature that cost is relatively low, convenient for installation and maintenance explode there is no spontaneous combustion and radiate the problems such as difficult, have good
Development and application prospect.
Detailed description of the invention
Fig. 1 is the explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber of one embodiment of the invention
Structural profile illustration.
Fig. 2 is the ultra-high/extra-high voltage gas-insulated transformer class anti-explosion set with buffer air chamber of another embodiment of the present invention
The structural profile illustration of pipe.
Fig. 3 is the structural schematic diagram of embodiment illustrated in fig. 1 lower part of the present invention.
Fig. 4 is that the present invention is double with what is used in the explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class of buffer air chamber
Layer metallic shield cartridge type electrode structure schematic diagram.
In figure, 1-1- gas insulated bushing, 1-2- power transformer enclosure, 1-3- isolation buffer gas chamber, 1-4- shading ring, 1-
5- transformer outlet grease chamber, 1-6- casing major insulation gas chamber, 1-7- insulated gate, the tapered insulator of 1-8-, 1-9- center conductor, 1-
The concentric cartridge type metallic shield electrode of 10-, 1-11- Hollow Compound/insulator, 3-1- high-field electrode, 3-2- grounding electrode, 3-3- are exhausted
Edge stick, 1-12- disc insulator.
Specific embodiment
The present invention is made further instructions below in conjunction with attached drawing.
As shown in Figure 1 to Figure 3, the ultra-high/extra-high voltage gas-insulated transformer class anti-explosion set with buffer air chamber of the invention
Pipe, including gas insulated bushing 1-1 and the power transformer enclosure 1-2 being connected with transformer base part, power transformer enclosure 1-2
First end (port on the left of lower end i.e. shown in figure) for curve shape, power transformer enclosure 1-2 is used for and transformer base part
Connection, the first end of power transformer enclosure 1-2, which is sealed and installed with, is dielectrically separated from support, is dielectrically separated from support and transformer base part
Between be capable of forming transformer outlet grease chamber 1-5；The second end (i.e. as shown in the figure upward one end) of power transformer enclosure 1-2 with
Gas insulated bushing 1-1 by flanged joint, power transformer enclosure 1-2 and gas insulated bushing 1-1 they junction it is close
Envelope is equipped with tapered insulator 1-8, in the inner cavity power transformer enclosure 1-2, is dielectrically separated from shape between support and tapered insulator 1-8
At isolation buffer gas chamber 1-3；It is filled in the casing major insulation gas chamber 1-6 of isolation buffer gas chamber 1-3 and gas insulated bushing 1-1
Insulating gas；Center conductor 1-9, center conductor 1-9 and cone are provided in gas insulated bushing 1-1 and power transformer enclosure 1-2
Type insulator 1-8 and be dielectrically separated from support between be tightly connected；Equipped with concentric cartridge type gold inside gas insulated bushing 1-1
Belong to bucking electrode 1-10；The end of gas insulated bushing 1-1 is equipped with shading ring 1-4.
As the preferred embodiment of the invention, the external insulation of gas insulated bushing 1-1 is Hollow Compound/porcelain insulator 1-
11；The preferred SF of insulating gas6Insulating gas or other environment-friendly type insulated gases, such as CO2、N2, PFC gas, CF3I gas, C4F7N
Gas or C5F10O gas etc..Being dielectrically separated from support is disc insulator, board-like insulator, tapered insulator or insulated gate.Isolation
Air pressure in buffer air chamber 1-3 is equal to the air pressure in gas insulated bushing 1-1.Transformer base part is transformer, change of current transformation
Device or reactor.Ultra-high/extra-high voltage gas-insulated transformer class explosion-proof casing of the present invention with buffer air chamber preferably but
AC transformer is not exclusively for into and out of thread casing, converter power transformer network side sleeve.Isolation buffer gas chamber of the present invention and two
The support that is dielectrically separated from end can be suitable according to the adjustment of casing voltage class, service condition progress structure, arrangement mode and quantity
With in extensive range.
Referring to Fig. 4, the concentric cartridge type metallic shield cartridge type electrode 1-10 that the present invention uses includes at least one set of high-field electrode
3-1 and grounding electrode 3-2, grounding electrode 3-2 and ground connection flanged joint, the both ends of high-field electrode 3-1 respectively with grounding electrode 3-2
Upper corresponding end is connected with each other and is fixed by several insulating bar 3-3.
In the explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber of the invention, transformer is increased
It is dielectrically separated from support using 2 inside seat 1-2, forms isolation buffer gas chamber 1-3, transformer outlet grease chamber 1-5, casing major insulation
Gas chamber 1-6.Support is dielectrically separated between transformer outlet grease chamber 1-5 and isolation buffer gas chamber 1-3, oil-gas isolation is played and makees
With；Tapered insulator 1-8 is located between casing major insulation gas chamber 1-6 and isolation buffer gas chamber 1-3, plays gas-gas buffer action.Phase
For the prior art, the present invention has the advantages that introducing isolation buffer gas in the coupling part of gas insulated bushing and transformer
Room, when inside pipe casing generates electric discharge, and casing side is caused to be dielectrically separated from support destruction, transformer side insulation isolation support can hinder
Gear gas enters inside transformer, while transformer oil can be stopped to enter failure inside pipe casing, effectively reduces casing transformation
A possibility that device oil firing, to reduce the probability of bushing explosion, that improves ultra-high/extra-high voltage gas-insulated transformer class casing can
By property.
Claims (7)
1. a kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber, which is characterized in that including gas
Insulating sleeve (1-1) and the power transformer enclosure (1-2) being connected with transformer base part, the of power transformer enclosure (1-2)
One end with transformer base part for connecting, and the first end of power transformer enclosure (1-2), which is sealed and installed with, is dielectrically separated from support, absolutely
Transformer outlet grease chamber (1-5) is capable of forming between edge isolation support and transformer base part；The of power transformer enclosure (1-2)
Two ends and gas insulated bushing (1-1) are by flanged joint, and power transformer enclosure (1-2) and gas insulated bushing (1-1) are even
The place of connecing is sealed and installed with tapered insulator (1-8), in the inner cavity power transformer enclosure (1-2), is dielectrically separated from support and tapered insulation
Isolation buffer gas chamber (1-3) is formed between sub (1-8)；The casing of isolation buffer gas chamber (1-3) and gas insulated bushing (1-1)
Insulating gas is filled in major insulation gas chamber (1-6)；
Be provided with center conductor (1-9) in gas insulated bushing (1-1) and power transformer enclosure (1-2), center conductor (1-9) with
Tapered insulator (1-8) and be dielectrically separated from support between be tightly connected；Equipped with concentric inside gas insulated bushing (1-1)
Cartridge type metallic shield electrode (1-10)；
The end of gas insulated bushing (1-1) is equipped with shading ring (1-4).
2. a kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber according to claim 1,
It is characterized in that, the external insulation of gas insulated bushing (1-1) is Hollow Compound/porcelain insulator (1-11).
3. a kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber according to claim 1,
It is characterized in that, the insulating gas uses SF6Insulating gas, CO2、N2, PFC gas, CF3I gas, C4F7N gas or C5F10O
Gas.
4. a kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber according to claim 1,
It is characterized in that, being dielectrically separated from support is disc insulator, board-like insulator, tapered insulator or insulated gate.
5. a kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber according to claim 1,
It is characterized in that, cartridge type metallic shield cartridge type electrode (1-10) includes at least one set of high-field electrode (3-1) and grounding electrode with one heart
(3-2), grounding electrode (3-2) and ground connection flanged joint, the both ends of high-field electrode (3-1) respectively with grounding electrode (3-2) on pair
The end answered is connected with each other and is fixed by several insulating bars (3-3).
6. a kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber according to claim 1,
It is characterized in that, the air pressure in isolation buffer gas chamber (1-3) is equal to the air pressure in gas insulated bushing (1-1).
7. a kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber according to claim 1,
It is characterized in that, the transformer base part is transformer, converter power transformer or reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910019852.8A CN109524218A (en) | 2019-01-09 | 2019-01-09 | A kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910019852.8A CN109524218A (en) | 2019-01-09 | 2019-01-09 | A kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber |
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| CN109524218A true CN109524218A (en) | 2019-03-26 |
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| CN201910019852.8A Pending CN109524218A (en) | 2019-01-09 | 2019-01-09 | A kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111029088A (en) * | 2019-12-24 | 2020-04-17 | 保定天威保变电气股份有限公司 | Anti-explosion structure between transformer lifting seat and sleeve and installation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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