CN108666116A - The middle pressure pressure regulation method of power auto-transformer - Google Patents
The middle pressure pressure regulation method of power auto-transformer Download PDFInfo
- Publication number
- CN108666116A CN108666116A CN201810655191.3A CN201810655191A CN108666116A CN 108666116 A CN108666116 A CN 108666116A CN 201810655191 A CN201810655191 A CN 201810655191A CN 108666116 A CN108666116 A CN 108666116A
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- China
- Prior art keywords
- winding
- transformer
- tap
- core
- core limb
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
- H02P13/06—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output by tap-changing; by rearranging interconnections of windings
Abstract
The invention discloses a kind of middle pressure pressure regulation method of power auto-transformer, this method includes：Booster transformer is concatenated on main transformer, booster transformer includes the second core limb and supercharging winding and field winding, and supercharging winding is concatenated with public winding, the head end of supercharging winding is made to connect middle extrusion thread casing；Each tap contact of tap switch lifts one's head with each shelves of tap-changing windings tap be connected respectively；Or each tap contact of tap switch taps to lift one's head and be connected with each shelves of low pressure winding respectively；Voltage is added to main transformer, and the head end of field winding and tail end is made to be connected respectively with the dynamic and static contact of tap switch, by the gear for changing tap switch, different voltage can be added to field winding, the voltage of supercharging winding changes correspondingly, to realize the middle pressure pressure regulation to power auto-transformer.Using voltage regulating mode of the present invention, the voltage class of tap changer and pressure regulation tap lead can be substantially reduced, and reduces production cost.
Description
Technical field
The invention belongs to transformer technology fields, are related to a kind of middle pressure pressure regulation method of power auto-transformer.
Background technology
For super-pressure auto-transformer of the medium voltage side voltage class equal to or higher than 400kV grades, due to wherein pressing
The voltage class of side is too high, if using conventional voltage regulating mode, the switch not for pressure regulation is optional；At the same time, because
Too high for the voltage class of medium voltage side, the design and manufacture difficulty of pressure regulation lead also can be very big.
Current super-pressure auto-transformer is frequently with the change magnetic flux for adjusting (i.e. neutral point is with tap-changing windings) in neutral point
Voltage regulating mode, opposite pressure regulation capacity is big, and the level capacity of tap changer also super large causes the bad choosing of tap changer, switch buying
Cost also greatly improves；In addition, using above-mentioned this variable flux voltage variation (VFVV) mode, the voltage fluctuation of low pressure winding can be caused.
If low pressure winding band reactive power compensator or the on-load of such transformer, also need to add bucking coil, with stabilization
The voltage of low pressure winding, thus further increases manufacturing cost and manufacture difficulty.
Invention content
The technical problem to be solved by the present invention is to aiming at the above shortcomings existing in the prior art, provide a kind of electric power from
The middle pressure pressure regulation method of coupling transformer, this voltage regulating mode using the present invention can voluntarily determine pressure regulation according to the design needs
The step voltage and electric current of switch, to effectively reduce the cost of transformer.
The middle pressure pressure regulation method that technical solution used by present invention problem is the power auto-transformer is solved, it should
Power auto-transformer includes main transformer, and the main transformer includes the first core limb and is wound on the first core limb
Series connection winding, public winding and low pressure winding, wherein the pressure regulation method includes the following steps：
Booster transformer is concatenated on main transformer, the booster transformer includes the second core limb and is wound on the second iron
Supercharging winding on stem and field winding make the supercharging winding be concatenated with public winding, and the head end of supercharging winding are made to connect
Middle extrusion thread casing；
Tap-changing windings are wound on the first core limb of main transformer, and each tap contact of tap switch is distinguished
Lift one's head with each shelves of tap-changing windings tap and is connected；Alternatively, low pressure winding is regard as tap-changing windings simultaneously, by each of tap switch
Tap contact lifts one's head with each shelves of low pressure winding tap be connected respectively；
To main transformer add voltage, and make field winding head end and tail end respectively with the dynamic and static contact of tap switch
It is connected, by changing the gear of tap switch, the field winding on the second core limb can be given to add different voltage, the second iron core
The voltage of supercharging winding on column is also corresponding therewith to be changed, to realize the middle pressure pressure regulation to the power auto-transformer.
Preferably, in main transformer, low pressure winding, tap-changing windings, public winding and series connection winding are according to from inside to outside
Sequence be wound on successively on the first core limb；Alternatively,
Tap-changing windings, low pressure winding, public winding and series connection winding are wound on first successively according to sequence from inside to outside
On core limb；Alternatively,
Low pressure winding, public winding and series connection winding are wound on according to sequence from inside to outside on the first core limb successively.
Preferably, which further includes an iron core, and booster transformer shares the iron core with main transformer,
First core limb and the second core limb are two different core limbs on the iron core；Alternatively, main transformer further includes main iron
The heart, the first core limb are the core limb in the main core, and booster transformer further includes pressure regulation iron core, and the second core limb is pressure regulation
Core limb in iron core.
Preferably, the main transformer is single-phase transformer, and correspondingly, booster transformer is also single-phase transformer；Alternatively,
The main transformer is three-phase transformer, and correspondingly, booster transformer is also three-phase transformer.
Under this voltage regulating mode of the present invention, due to the iron core main flux substantially constant of main transformer, low pressure winding
Voltage fluctuation is hardly generated because of pressure regulation.By using this voltage regulating mode, greatly reduces tap changer and (divide
Connect switch) and pressure regulation tap lead (lead lifted one's head of pressure regulation of connection tap switch) voltage class, therefore select existing
Tap changer is achieved that carries out pressure regulation to the middle pressure of super-pressure auto-transformer.
Pressure regulation method of the present invention is suitable for power auto-transformer, makes especially suitable for high pressure or superhigh tension power transformer
With, be particularly suitable for medium voltage side voltage be more than or equal to 400kV ultrahigh voltage power auto-transformer.
Description of the drawings
Fig. 1 is the elementary diagram of power auto-transformer in the embodiment of the present invention 1；
Fig. 2 is the elementary diagram of power auto-transformer in the embodiment of the present invention 2；
In figure：1- series connection windings；2- public windings；3- low pressure windings；4- field windings；5- is pressurized winding；6- pressure regulation around
Group.
Specific implementation mode
Below in conjunction with the attached drawing in the present invention, clear, complete description is carried out to the technical solution in the present invention, is shown
So, described embodiment is a part of the embodiment of the present invention, instead of all the embodiments.Based on the implementation in the present invention
Example, the every other embodiment that those of ordinary skill in the art are obtained without making creative work all belong to
In the scope of protection of the invention.
To make those skilled in the art more fully understand technical scheme of the present invention, in the following with reference to the drawings and specific embodiments
Present invention is further described in detail.
Embodiment：
The power auto-transformer that middle pressure pressure regulation method in the present embodiment is applied is a kind of ultrahigh voltage power self coupling change
Depressor, wherein the medium voltage side voltage of the power auto-transformer is 400kV, high side voltage 750kV.
As shown in Figure 1, the power auto-transformer includes main transformer, the main transformer includes the first core limb (figure
In be not shown) and be wound on series connection winding 1, public winding 2 and low pressure winding 3 on the first core limb.
Wherein, public winding 2 constitutes the middle pressure winding of the power auto-transformer, and series connection winding 1 is connected with public winding 2
The high-voltage winding of the power auto-transformer is collectively formed after connection.Low pressure winding 3 and the position of public winding 2 can be interchanged.
Series connection winding 1 is middle part outlet.
As shown in Figure 1, the middle pressure pressure regulation method of power auto-transformer provided in this embodiment, specifically includes following step
Suddenly：
Concatenate booster transformer on main transformer, the booster transformer include the second core limb (not shown) and
The supercharging winding 5 and field winding 4 being wound on the second core limb, wherein so that supercharging winding 5 is concatenated with public winding 2, even if
Supercharging winding 5 tail end be connected with the head end of public winding 2, be pressurized winding 5 head end meet middle extrusion line sleeve A m, that is, be pressurized around
The head end voltage of group 5 is exactly the middle piezoelectricity pressure of the power auto-transformer；
Tap-changing windings are wound on the first core limb 8 of main transformer, and by tap switch (such as use model
The tap switch of MI-600Y-72.5/C-10193W) each tap contact lift one's head phase with each shelves of tap-changing windings tap respectively
Even；
To main transformer add voltage, and make field winding 4 head end and tail end respectively with the dynamic and static contact of tap switch
It is connected, by changing the gear of tap switch, to add different voltage to the field winding 4 on the second core limb, according to electricity
Magnetic induction principle, the voltage of the supercharging winding 5 on the second core limb is also corresponding therewith to be changed, you can is realized and is become to the electric power self coupling
The middle pressure of depressor carries out pressure regulation.
Wherein, without direct connection relational between low pressure winding 3 and tap-changing windings 6.
When adding voltage to the power auto-transformer, every grade of tap-changing windings 6 tap just produces between lifting one's head
Corresponding voltage value, when the moving contact of tap switch (tap changer) changes different tap positions, field winding 4 can obtain
Corresponding different voltage value, under the action of the voltage of field winding 4 changes, then the iron core of booster transformer 5 will produce phase
The magnetic flux answered, in this way, under the action of electromagnetic induction, supercharging winding 5 also induces corresponding according to the no-load voltage ratio with field winding 4
A voltage value.Since supercharging winding 5 is identical with the phase of public winding 2, the voltage that induces of supercharging winding 5 and it is public around
The voltage of group 2 is formed superposition, so as to achieve the purpose that middle pressure pressure regulation.
Wherein, the middle pressure pressure regulation method in the present embodiment, is not only suitable for linear tune mode, is also applied for positive anti-tune mode.
When using linear tune mode, the tap switch specifically used is linear tune switch, for example uses model MI-600Y-72.5/
The linear tune switch of C-18180；When using positive anti-tune mode, the tap switch specifically used is positive and negative tune switch, for example is adopted
With the positive and negative tune switch of model MI-600Y-72.5/C-10193W.
Power auto-transformer in the present embodiment is either single-phase transformer, can also be Integral three-phase transformation
Device.Specifically, which uses single-phase transformer, i.e. main transformer and booster transformer is single-phase transformation
Device, correspondingly, in the present embodiment, tap switch also uses single-phase tap switch.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, in the essence for not departing from the present invention
In the case of refreshing and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (4)
1. a kind of middle pressure pressure regulation method of power auto-transformer, which includes main transformer, the main transformer
Depressor includes the first core limb and the series connection winding, public winding and the low pressure winding that are wound on the first core limb, feature
It is, the pressure regulation method includes the following steps：
Booster transformer is concatenated on main transformer, the booster transformer includes the second core limb and is wound on the second core limb
On supercharging winding and field winding, so that the supercharging winding is concatenated with public winding, and the head end of supercharging winding is made to connect middle pressure
Outlet casing tube；
Tap-changing windings are wound on the first core limb of main transformer, and by each tap contact of tap switch respectively with tune
Each shelves tap of pressure winding is lifted one's head connected；Alternatively, low pressure winding is regard as tap-changing windings simultaneously, by each tap of tap switch
Contact lifts one's head with each shelves of low pressure winding tap be connected respectively；
Voltage is added to main transformer, and the head end of field winding and tail end is made to be connected respectively with the dynamic and static contact of tap switch,
It, can be to the field winding on the second core limb plus different voltage, on the second core limb by changing the gear of tap switch
Supercharging winding voltage it is also corresponding therewith change, to realize the middle pressure pressure regulation to the power auto-transformer.
2. the method as described in claim 1, which is characterized in that in main transformer, low pressure winding, tap-changing windings, it is public around
Group and series connection winding are wound on according to sequence from inside to outside on the first core limb successively；Alternatively,
Tap-changing windings, low pressure winding, public winding and series connection winding are wound on the first iron core successively according to sequence from inside to outside
On column；Alternatively,
Low pressure winding, public winding and series connection winding are wound on according to sequence from inside to outside on the first core limb successively.
3. the method as described in claim 1, which is characterized in that the power auto-transformer further includes an iron core, and supercharging becomes
Depressor shares the iron core with main transformer, and first core limb and the second core limb are two different iron cores on the iron core
Column；Alternatively, main transformer further includes main core, the first core limb is the core limb in the main core, and booster transformer also wraps
Pressure regulation iron core is included, the second core limb is the core limb in pressure regulation iron core.
4. such as claims 1 to 3 any one of them method, which is characterized in that the main transformer is single-phase transformer, accordingly
Ground, booster transformer are also single-phase transformer；Alternatively, the main transformer is three-phase transformer, and correspondingly, booster transformer
For three-phase transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810655191.3A CN108666116A (en) | 2018-06-23 | 2018-06-23 | The middle pressure pressure regulation method of power auto-transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810655191.3A CN108666116A (en) | 2018-06-23 | 2018-06-23 | The middle pressure pressure regulation method of power auto-transformer |
Publications (1)
| Publication Number | Publication Date |
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| CN108666116A true CN108666116A (en) | 2018-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810655191.3A Withdrawn CN108666116A (en) | 2018-06-23 | 2018-06-23 | The middle pressure pressure regulation method of power auto-transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113325209A (en) * | 2020-12-02 | 2021-08-31 | 吴江变压器有限公司 | Design method of temporary sleeve outgoing line for transformer test |
-
2018
- 2018-06-23 CN CN201810655191.3A patent/CN108666116A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113325209A (en) * | 2020-12-02 | 2021-08-31 | 吴江变压器有限公司 | Design method of temporary sleeve outgoing line for transformer test |
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Application publication date: 20181016 |