CN206194521U - Direct current electric stove is with directly falling 54 pulse wave rectifier transformer of formula - Google Patents
Direct current electric stove is with directly falling 54 pulse wave rectifier transformer of formula Download PDFInfo
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- CN206194521U CN206194521U CN201621292102.6U CN201621292102U CN206194521U CN 206194521 U CN206194521 U CN 206194521U CN 201621292102 U CN201621292102 U CN 201621292102U CN 206194521 U CN206194521 U CN 206194521U
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Abstract
The utility model discloses a direct current electric stove is with directly falling 54 pulse wave rectifier transformer of formula relates to transformer technical field. Including powerstat, rectifier transformer and oil tank, the powerstat is placed respectively in the oil tank with rectifier transformer, is the oil tank through oil oil bushing. High -pressure side 330kV power grid access can be realized to this device, and low pressure valve side several lies prostrate voltage output's the formula structure demand of falling of straightening to showing and reducing the harmonic content who pours into the electric wire netting into.
Description
Technical field
The utility model is related to transformer technology field, more particularly to a kind of direct current furnace pulse wave rectifier of linear descending 54
Transformer.
Background technology
Electric furnace in traditional industry uses ac electric arc furnace transformer-supplied mostly, has several meters to arrive between furnace transformer and electric furnace
Twenties meters of distance, because furnace transformer low-pressure side voltage is low, electric current it is big, therefore furnace transformer to electric furnace it is short on the net
There is very big impedance voltage drop and loss so that electric furnace electric power system harmonic wave is big, power factor is low, high energy consumption, the efficiency of system becomes
Low, ac electric arc furnace is subject to increasing restriction.
Using direct current supply, the power factor of electric furnace electric power system can be improved, short net impedance and energy consumption is reduced.For direct current
The rectifier transformer general high voltage side voltage of electric furnace be 10-35kV, up to 110kV, if from 330kV voltages by electricity, it is necessary to
Build 330kV/110kV (35kV) step-down substation so that capital construction and cost of investment are greatly increased, while also greatly increasing
Add later maintenance expense, and traditional direct current furnace rectifier transformer structure is the pulse wave of unit 6 or the pulse wave of unit 12, it is special
Harmonic wave is levied for 5/7 time and 11/13 subharmonic, the harmonic content for injecting power network is relatively large.
Utility model content
The technical problems to be solved in the utility model is directed to above-mentioned the deficiencies in the prior art, there is provided a kind of direct current furnace is used
The pulse wave rectifier transformer of linear descending 54, this device can realize that high-pressure side 330kV power networks are accessed, and a few hectovolt voltages in low pressure valve side are defeated
The linear descending topology requirement for going out, and significantly reduce the harmonic content of injection power network.
In order to solve the above technical problems, technical solution adopted in the utility model is：A kind of direct current furnace linear descending
54 pulse wave rectifier transformers, including adjustable transformer, rectifier transformer and fuel tank, the adjustable transformer and rectifier transformer point
It is not placed in fuel tank, fuel tank is connected by oil-tubing and casing.
Further, adjustable transformer includes compensative winding, coarse adjustment winding, high pressure winding and fine tuning winding.
Further, adjustable transformer uses neutral point voltage regulating mode.
Further, coarse adjustment winding parallel ZnO valve plate formula arrester.
Further, rectifier transformer is provided with three, is arranged in " П " shape.
Further, rectifier transformer includes low pressure winding, once basic winding and a Phase shift winding.
Further, low pressure winding is using double cake formula structures.
Further, once basic winding is differed successively with the resultant voltage phasor deviation angle of a Phase shift winding
20°。
Further, rectifier transformer low pressure valve side is using double reverse-stars type cophase counter parallel connection band paralleing reactor structure.
It is using the beneficial effect produced by above-mentioned technical proposal：The utility model can realize high-pressure side 330kV electricity
Net is directly inputted, the linear descending topology requirement of a few hectovolt voltage outputs of low-pressure side, and significantly reduce injection power network harmonic wave contain
Amount.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the utility model embodiment；
Fig. 2 is the device body arrangement figure of the utility model embodiment adjustable transformer；
Fig. 3 is the device body arrangement figure of the utility model embodiment rectifier transformer；
Fig. 4 is the utility model embodiment adjustable transformer pressure regulation elementary diagram；
Fig. 5 is the utility model embodiment rectifier transformer low pressure winding Local map.
In figure：1st, adjustable transformer；2nd, rectifier transformer；3rd, fuel tank；4th, compensative winding；5th, coarse adjustment winding；6th, high voltage winding
Group；7th, fine tuning winding；8th, on-load tap changer；9th, ZnO valve plate formula arrester；10th, low pressure winding；11st, once substantially about
Group；12nd, a Phase shift winding；13rd, oil-tubing and casing；14th, iron core；15th, cooling oil duct.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
As shown in figure 1, being an a kind of implementation of pulse wave rectifier transformer of direct current furnace linear descending 54 of the utility model
Example, the adjustable transformer 1 is individually positioned in fuel tank 3 with rectifier transformer 2, and three oil-tubing and casings are passed through between two fuel tanks 3
13 couple together the secondary side lead of adjustable transformer and the primary side lead of rectifier transformer, reduce transformer powered
The aerial Naked dew in part, improves transformer station high-voltage side bus reliability.
As shown in Fig. 2 adjustable transformer includes compensative winding 4, coarse adjustment winding 5, high pressure winding 6 and fine tuning winding 7, it is described
Compensative winding 4, coarse adjustment winding 5, high pressure winding 6, fine tuning winding 7 are sleeved on iron core 14 successively from inside to outside, and coarse adjustment winding 5 is
Multilayer layered structure, interlayer have radiating and insulating oil duct, fine tuning winding 7 be two-way parallel spiral formula structure, upper and lower two parts it
Between leave the extraction that enough clearance for insulation ensures 330kV high pressure winding head end leads.
Adjustable transformer 1 uses neutral point voltage regulating mode, and coarse adjustment winding 5 and fine tuning winding 7 are tapped by on-load voltage regulation to be opened
Close 8 to connect, constitute neutral point voltage regulating mode, three single-phase load ratio bridging switches are needed relative to traditional secondary side line end pressure regulation
Composition, which only needs to an on-load tap changer 8, you can completes the purpose of pressure regulation on a large scale, greatlys save out
Cost is closed, fuel tank volume is reduced；The regulation on a large scale of secondary voltage is capable of achieving by the conversion of on-load tap changer 8,
Minimum 15% voltage can be adjusted to by the voltage of highest 100%, meet voltage transformation requirement when electric furnace runs.
As shown in figure 4, the ZnO valve plate formula arrester 9 in parallel of coarse adjustment winding 6, can effectively restriction effect on tap-changing windings
Overvoltage is no more than certain level, improves insulating reliability.
As shown in figure 1, rectifier transformer 2 is provided with three, arranged in " П " shape, primary side lead is worn between three device bodies
Cross, the first side winding with three device bodies is connected respectively.
As shown in figure 3, rectifier transformer 2 includes low pressure winding 10, once basic winding 11 and a Phase shift winding 12.One
Secondary Phase shift winding 12, once basic winding 11 and low pressure winding 10 are sleeved on iron core 14 successively from inside to outside, low pressure winding 10
Device body outermost is placed on, facilitates the extraction of Winding tap, one time Phase shift winding 12 is arranged on the primary side of rectifier transformer 2.
As shown in figure 5, double cake formula structures of the low pressure winding 10 using optimization, on the one hand, the first of double pie winding two ends
Individual pair of cake uses the wire of increasing section, second of two ends and the 3rd double cakes to use the wire for reducing section, on the other hand,
Using the structure for increasing than internal winding 30-60mm, reduce the current value and electric current in the double cakes in double pie winding ends first
Density, makes whole winding temperature be evenly distributed, it is to avoid the generation of hot-spot.In addition, in each one of the first and last end interlayer of double cakes
Cooling oil duct 15 is provided with 1/3 from inside to outside, the heat of line cake is fully distributed, effectively prevent winding overhang part
Overheat.
Once basic winding 11 differs 20 ° successively with the resultant voltage phasor deviation angle of a Phase shift winding 12.
The low pressure valve side of rectifier transformer 2, can unit output using double reverse-stars type cophase counter parallel connection band paralleing reactor structure
18 pulse waves, compared with the conventional pulse wave of unit 6 or the pulse wave rectifier transformer of unit 12, reduce harmonic wave, lift electric furnace electric power system
Efficiency；Low pressure valve side directly can be connected in the face outlet of oil tank wall three with rectifier cabinet, reduce copper bar length, reduce short net resistance
Anti- and loss.
The course of work：From 330kV power networks directly by electricity, first passing through adjustable transformer 1 will for the utility model device high-pressure side
High-tension electricity is reduced to low tension, then exports DC pulse moving voltage by rectifier transformer 2, and three of the utility model setting are whole
Exportable 54 pulse wave of convertor transformer 2, effectively eliminates less than 53/55 time harmonic wave, reduces injection mains by harmonics.
The utility model direct current furnace pulse wave rectifier transformer of linear descending 54 is by traditional 330kV/110kV（35kV）Drop
Pressure transformer and 110kV（35kV）Furnace transformer is combined, and reduces middle step-down link, is reduced transformer substation construction and is thrown
Money, improves efficiency, also greatly reduces land seizure and transformer maintenance cost.The utility model is around direct current
Stove arranges three rectifier transformers, and DC side output reaches 3*18=54 pulse waves, can effectively eliminate less than 53/55 time harmonic wave, will note
Enter the Harmonic of power network in an extremely low number range, improve the efficiency of electric furnace electric power system.
Transformer device structure of the present utility model reduces short net impedance and damage compared with traditional ac electric arc furnace transformer
Consumption, raising power factor, thus the efficiency of whole system is improve, reduce voltage flicker and arc noise.With common list
The pulse wave of machine 6 and 12 pulse wave rectifier transformers are compared, and the utility model DC voltage ripple is smaller, in hgher efficiency, injection power network
Harmonic wave greatly reduces, and the power network quality of power supply is improved.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the utility model, it is all at this
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (9)
1. a kind of direct current furnace pulse wave rectifier transformer of linear descending 54, it is characterised in that including adjustable transformer（1）, rectification
Transformer（2）And fuel tank（3）, the adjustable transformer（1）With rectifier transformer（2）It is individually positioned in fuel tank（3）It is interior, fuel tank
（3）By oil-tubing and casing（13）Connection.
2. the direct current furnace according to claim 1 pulse wave rectifier transformer of linear descending 54, it is characterised in that the pressure regulation
Transformer（1）Including compensative winding（4）, coarse adjustment winding（5）, high pressure winding（6）With fine tuning winding（7）, and from inside to outside successively
It is sleeved on iron core（14）On.
3. the direct current furnace according to claim 2 pulse wave rectifier transformer of linear descending 54, it is characterised in that the pressure regulation
Transformer（1）Using neutral point voltage regulating mode.
4. the direct current furnace according to claim 2 pulse wave rectifier transformer of linear descending 54, it is characterised in that the coarse adjustment
Winding（5）ZnO valve plate formula arrester in parallel（9）.
5. the direct current furnace according to claim 1 pulse wave rectifier transformer of linear descending 54, it is characterised in that the rectification
Transformer（2）Three are provided with, are arranged in " П " shape.
6. the direct current furnace according to claim 1 pulse wave rectifier transformer of linear descending 54, it is characterised in that the rectification
Transformer（2）Including a Phase shift winding（12）, once basic winding（11）And low pressure winding（10）, and cover successively from inside to outside
Mounted in iron core（14）On.
7. the direct current furnace according to claim 6 pulse wave rectifier transformer of linear descending 54, it is characterised in that the low pressure
Winding（10）Using double cake formula structures.
8. the direct current furnace according to claim 6 pulse wave rectifier transformer of linear descending 54, it is characterised in that it is described once
Basic winding（11）Resultant voltage phasor deviation angle with a Phase shift winding differs 20 ° successively.
9. the direct current furnace according to claim 1 pulse wave rectifier transformer of linear descending 54, it is characterised in that the rectification
Transformer（2）Low pressure valve side is using double reverse-stars type cophase counter parallel connection band paralleing reactor structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621292102.6U CN206194521U (en) | 2016-11-29 | 2016-11-29 | Direct current electric stove is with directly falling 54 pulse wave rectifier transformer of formula |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621292102.6U CN206194521U (en) | 2016-11-29 | 2016-11-29 | Direct current electric stove is with directly falling 54 pulse wave rectifier transformer of formula |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206194521U true CN206194521U (en) | 2017-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621292102.6U Active CN206194521U (en) | 2016-11-29 | 2016-11-29 | Direct current electric stove is with directly falling 54 pulse wave rectifier transformer of formula |
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| CN (1) | CN206194521U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710850A (en) * | 2016-11-29 | 2017-05-24 | 保定天威集团特变电气有限公司 | Direct step-down 54-pulse rectifier transformer for direct current furnace |
-
2016
- 2016-11-29 CN CN201621292102.6U patent/CN206194521U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710850A (en) * | 2016-11-29 | 2017-05-24 | 保定天威集团特变电气有限公司 | Direct step-down 54-pulse rectifier transformer for direct current furnace |
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