CN209561165U - A kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class using isobaric isolation gas chamber - Google Patents
A kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class using isobaric isolation gas chamber Download PDFInfo
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- CN209561165U CN209561165U CN201920037897.3U CN201920037897U CN209561165U CN 209561165 U CN209561165 U CN 209561165U CN 201920037897 U CN201920037897 U CN 201920037897U CN 209561165 U CN209561165 U CN 209561165U
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Abstract
The utility model relates to a kind of explosion-proof casings of ultra-high/extra-high voltage gas-insulated transformer class using isobaric isolation gas chamber, including gas insulated bushing (1-1) and the power transformer enclosure (1-2) being connected with transformer base part, the first end of power transformer enclosure (1-2) with transformer base part for connecting, the first end of power transformer enclosure (1-2), which is sealed and installed with, is dielectrically separated from support, is dielectrically separated between support and transformer base part and is capable of forming transformer outlet grease chamber (1-5)；The second end and gas insulated bushing (1-1) of power transformer enclosure (1-2) pass through flanged joint, power transformer enclosure (1-2) is sealed and installed with tapered insulator (1-8) in junction with gas insulated bushing (1-1), in the inner cavity power transformer enclosure (1-2), it is dielectrically separated between support and tapered insulator (1-8) and is formed with isolation buffer gas chamber (1-3)；Insulating gas is filled in the casing major insulation gas chamber (1-6) of isolation buffer gas chamber (1-3) and gas insulated bushing (1-1).The safety and reliability of ultra-high/extra-high voltage AC and DC casing and transformer in operation can be improved in the utility model.
Description
Technical field
The utility model belongs to the electrical apparatus insulation structure design and optimization design neck of ultra-high/extra-high voltage AC and DC transmission facility
A kind of domain, and in particular to explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class using isobaric isolation gas 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.
Utility model content
Purpose of the utility model is to solve existing design there are the problem of, provide a kind of using isobaric isolation gas
The explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class of room, the casing introduce isolation buffer gas chamber in the design, work as set
When pipe internal discharge causes the tapered insulator dielectric isolation support in casing side to damage, then the support that is dielectrically separated from of transformer side can
Effectively transformer oil is stopped to flow into gas chamber, while the gas in casing being stopped to enter inside transformer, reduces arc ignition transformation
A possibility that device is oily 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
The safety and reliability of AC and DC casing and transformer in operation.
In order to achieve the above objectives, the utility model adopts the following technical solution realizes:
A kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class using isobaric isolation gas chamber, including gas-insulated
The first end of casing and the power transformer enclosure being connected with transformer base part, power transformer enclosure is used for and transformer class portion
Part connection, the first end of power transformer enclosure, 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；The second end and gas insulated bushing of power transformer enclosure are become by flanged joint
Depressor increases seat and gas insulated bushing and is sealed and installed with tapered insulator in junction, in power transformer enclosure inner cavity, insulation
Isolation buffer gas chamber is formed between isolation support and tapered insulator；The casing master of isolation buffer gas chamber and gas insulated bushing
Insulating gas is filled in insulation 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 and 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 utility model has the following beneficial effects:
The explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class of gas chamber is isolated using equipressure for the utility model, compared to
Traditional transformer class casing has the following advantages: first generation transformer class casing is usually oil impregnated paper bushing, such casing although
It shows and stablizes in the operation of many years, but still there are problems that moisture-sensitive, easily leakage；On the other hand, when inside pipe casing occurs
When electric discharge, casing is easy to happen explosion and forms extensive fire, causes great prestige to the safe and stable operation of electric system
The side of body.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 body
The advantages that product is small, light-weight, hydrophobicity is good, durability against pollution is strong, easy to maintain；However, the investment of such bushing installation is big, manufacturing cost
It is higher, it is more demanding to working condition, manufacturing process etc.；In addition, with the continuous promotion of transmission capacity, the hair of glue stain paper bushing
Heat and heat dissipation problem solution difficulty are larger.The utility model is using the isobaric ultra-high/extra-high voltage gas-insulated transformer that gas chamber is isolated
The explosion-proof casing of class is by tapered insulator and is dielectrically separated from support entire casing has been divided into transformer outlet grease chamber, isolation buffer
Filling insulation in the casing major insulation gas chamber of gas chamber and casing major insulation gas chamber, isolation buffer gas chamber and gas insulated bushing
Gas；First, which has the characteristics that light-weight；Secondly, the casing introduces isolation buffer gas chamber in the design, when
When inside pipe casing electric discharge causes the tapered insulator of casing side to damage, then transformer side is dielectrically separated from support and can effectively stop
Transformer oil flows into isolation buffer gas chamber, while the gas in casing being stopped to enter inside transformer, reduces arc ignition and becomes
A possibility that depressor oil causes casing and transformer to burn and explode reduces because inside pipe casing electric discharge causes casing and transformer quick-fried
Fried probability, so that the safety and reliability of ultra-high/extra-high voltage AC and DC casing and transformer in operation is improved, therefore this
Utility model has the characteristics that casing high reliablity, cost is relatively low, convenient for installation and maintenance, explodes and radiates there is no spontaneous combustion and is tired
The problems such as difficult, has good development and application prospect.
Detailed description of the invention
Fig. 1 is the ultra-high/extra-high voltage gas-insulated transformer class using isobaric isolation gas chamber of an embodiment of the present invention
The structural profile illustration of explosion-proof casing.
Fig. 2 is the ultra-high/extra-high voltage gas-insulated transformer using isobaric isolation gas chamber of another embodiment of the utility model
The structural profile illustration of the explosion-proof casing of class.
Fig. 3 is the structural schematic diagram of the utility model embodiment illustrated in fig. 1 lower part.
Fig. 4 is in the explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class of the utility model using isobaric isolation gas chamber
The double-level-metal of use shields 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/porcelain insulator, 3-1- high-field electrode, 3-2- grounding electrode, 3-3-
Insulating bar, 1-12- disc insulator.
Specific embodiment
The utility model is made further instructions below in conjunction with attached drawing.
As shown in Figure 1 to Figure 3, the utility model is using the isobaric ultra-high/extra-high voltage gas-insulated transformer class that gas chamber is isolated
Explosion-proof casing, including the gas insulated bushing 1-1 and power transformer enclosure 1-2 being connected with transformer base part, transformer liter
Dais 1-2 is curve shape, and the first end (port on the left of lower end i.e. shown in figure) of power transformer enclosure 1-2 is used for and transformation
The connection of device base part, 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 transformation
Transformer outlet grease chamber 1-5 is capable of forming between device base part；The second end of power transformer enclosure 1-2 is (i.e. as shown in the figure upward
One end) with gas insulated bushing 1-1 by flanged joint, power transformer enclosure 1-2 and gas insulated bushing 1-1 they
Junction 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 insulator
Isolation buffer gas chamber 1-3 is formed between 1-8；The casing major insulation gas chamber 1- of isolation buffer gas chamber 1-3 and gas insulated bushing 1-1
Insulating gas is filled in 6；It is provided with center conductor 1-9 in gas insulated bushing 1-1 and power transformer enclosure 1-2, center is led
Body 1-9 and tapered insulator 1-8 and be dielectrically separated from support between be tightly connected；It is equipped with inside gas insulated bushing 1-1
Concentric cartridge type metallic shield electrode 1-10；The end of gas insulated bushing 1-1 is equipped with shading ring 1-4.
As the utility model preferred embodiment, the external insulation of gas insulated bushing 1-1 is Hollow Compound/porcelain insulating
Sub- 1-11；The preferred SF of insulating gas6Insulating gas, or use other environment-friendly type insulated gases, such as CO2、N2, PFC gas, CF3I
Gas, C4F7N gas and C5F10O gas etc..Be dielectrically separated from support be disc insulator, board-like insulator, tapered insulator or
Insulated gate.Air pressure in isolation buffer gas chamber 1-3 is equal to the air pressure in gas insulated bushing 1-1.Transformer base part is transformation
Device, converter power transformer or reactor.Ultra-high/extra-high voltage gas-insulated transformation described in the utility model using isobaric isolation gas chamber
The explosion-proof casing of device class is preferred but is not exclusively for AC transformer into and out of thread casing, converter power transformer network side sleeve.The utility model
The isolation buffer gas chamber and both ends be dielectrically separated from support can according to casing voltage class, service condition carry out structure,
The adjustment of arrangement mode and quantity, it is applied widely.
Referring to Fig. 4, the concentric cartridge type metallic shield cartridge type electrode 1-10 that the utility model uses includes at least one set of high pressure
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 are electric with ground connection respectively
Corresponding end is connected with each other and is fixed by several insulating bar 3-3 on the 3-2 of pole.
In the explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class using isobaric isolation gas chamber of the utility model, become
Depressor increases and is dielectrically separated from support using 2 inside seat 1-2, forms isolation buffer gas chamber 1-3, transformer outlet grease chamber 1-5, set
Pipe major insulation gas chamber 1-6.Support is dielectrically separated between transformer outlet grease chamber 1-5 and isolation buffer gas chamber 1-3, plays oil-
Gas buffer action；Tapered insulator 1-8 is located between casing major insulation gas chamber 1-6 and isolation buffer gas chamber 1-3, rise gas-gas every
From effect.Compared with the existing technology, utility model has the advantages that the interconnecting piece in gas insulated bushing and transformer separates
Enter isolation buffer gas chamber, when inside pipe casing generate electric discharge cause casing side be dielectrically separated from support destroy when, transformer side insulation every
Gas can be stopped to enter inside transformer from support, while transformer oil can be stopped to enter failure inside pipe casing, effectively subtracted
A possibility that small casing transformer oil burning, improves ultra-high/extra-high voltage gas-insulated transformation to reduce the probability of bushing explosion
The reliability of device class casing.
Claims (6)
1. a kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class using isobaric isolation gas chamber, which is characterized in that 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 for being connect with transformer base part, the first end of power transformer enclosure (1-2), which is sealed and installed with, is dielectrically separated from branch
Support, is dielectrically separated between support and transformer base part and is capable of forming transformer outlet grease chamber (1-5)；Power transformer enclosure (1-
2) second end and gas insulated bushing (1-1) passes through flanged joint, power transformer enclosure (1-2) and gas insulated bushing (1-
1) it is sealed and installed with tapered insulator (1-8) in junction, in the inner cavity power transformer enclosure (1-2), is dielectrically separated from support and cone
Isolation buffer gas chamber (1-3) is formed between type insulator (1-8)；Isolation buffer gas chamber (1-3) and gas insulated bushing (1-1)
Casing major insulation gas chamber (1-6) in fill insulating gas；
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)；
Air pressure in isolation buffer gas chamber (1-3) is equal to the air pressure in gas insulated bushing (1-1).
2. a kind of ultra-high/extra-high voltage gas-insulated transformer class using isobaric isolation gas chamber according to claim 1 is explosion-proof
Casing, which is characterized in that the external insulation of gas insulated bushing (1-1) is hollow combined insulator or hollow porcelain insulator.
3. a kind of ultra-high/extra-high voltage gas-insulated transformer class using isobaric isolation gas chamber according to claim 1 is explosion-proof
Casing, which is characterized in that the insulating gas is SF6Insulating gas, CO2、N2, PFC gas, CF3I gas, C4F7N gas or
C5F10O gas.
4. a kind of ultra-high/extra-high voltage gas-insulated transformer class using isobaric isolation gas chamber according to claim 1 is explosion-proof
Casing, which is characterized in that being dielectrically separated from support is disc insulator, board-like insulator, tapered insulator or insulated gate.
5. a kind of ultra-high/extra-high voltage gas-insulated transformer class using isobaric isolation gas chamber according to claim 1 is explosion-proof
Casing, which is characterized in that concentric cartridge type metallic shield cartridge type electrode (1-10) includes at least one set of high-field electrode (3-1) and ground connection
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 bars (3-3).
6. a kind of ultra-high/extra-high voltage gas-insulated transformer class using isobaric isolation gas chamber according to claim 1 is explosion-proof
Casing, which 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 |
|---|---|---|---|
| CN201920037897.3U CN209561165U (en) | 2019-01-09 | 2019-01-09 | A kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class using isobaric isolation gas chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920037897.3U CN209561165U (en) | 2019-01-09 | 2019-01-09 | A kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class using isobaric isolation gas chamber |
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| CN209561165U true CN209561165U (en) | 2019-10-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109524218A (en) * | 2019-01-09 | 2019-03-26 | 西安交通大学 | A kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber |
| CN112113143A (en) * | 2020-07-31 | 2020-12-22 | 西安交通大学 | Primary pulse source and normal-pressure gas external insulation system and method |
-
2019
- 2019-01-09 CN CN201920037897.3U patent/CN209561165U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109524218A (en) * | 2019-01-09 | 2019-03-26 | 西安交通大学 | A kind of explosion-proof casing of ultra-high/extra-high voltage gas-insulated transformer class with buffer air chamber |
| CN112113143A (en) * | 2020-07-31 | 2020-12-22 | 西安交通大学 | Primary pulse source and normal-pressure gas external insulation system and method |
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