CN104953909A - Medium voltage regulation method of power autotransformer and power autotransformer - Google Patents
Medium voltage regulation method of power autotransformer and power autotransformer Download PDFInfo
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Abstract
The present invention discloses a medium voltage regulation method of a power autotransformer and the power autotransformer. The method comprises the following steps that: a booster transformer which comprises a second iron core column, a booster winding and an exciting winding are in series connection with a main transformer, the booster winding and a common winding are connected in series such that the head end of the booster winding is connected to a medium voltage wire outlet brushing, each tap contact of a tap switch is respectively connected to each gear of tap contact of a voltage regulating winding, or each tap contact of a tap switch is respectively connected to each gear of tap contact of a low voltage winding, voltage is applied to the main transformer such that the head end and the tail end of the exciting winding are connected to the moving and static contacts of the tap switch respectively, through changing the gear of the tap switch, different voltage can be applied to the exciting winding, and the voltage of the booster winding is also changed so as to realize the medium voltage regulation of the power autotransformer. By using the voltage regulation mode of the invention, the voltage levels of a voltage regulation switch and a voltage regulation tap lead can be reduced greatly, and the production cost is reduced.
Description
Technical field
The invention belongs to transformer technology field, relate to a kind of middle pressure pressure regulation method and power auto-transformer of power auto-transformer.
Background technology
Medium voltage side electric pressure is equal to or higher than to the superhigh pressure autotransformer of 400kV level, because the electric pressure of its medium voltage side is too high, if adopt conventional voltage regulating mode, will the switch selectable that can supply pressure regulation be there is no; Meanwhile, because the electric pressure of medium voltage side is too high, the Design and manufacture difficulty of pressure regulation lead-in wire also can be very large.
Current superhigh pressure autotransformer often adopts the variable flux voltage regulation mode regulating (i.e. neutral point band tap-changing windings) at neutral point, its relative pressure regulation capacity is large, the level capacity also super large of tap changer, cause the bad choosing of tap changer, switch purchase cost also improves greatly; In addition, adopt above-mentioned this variable flux voltage regulation mode, the voltage fluctuation of low pressure winding can be caused.If the low pressure winding strap reactive power compensator of this kind of transformer or on-load, then also need to set up bucking coil, with the voltage of stabilizing low voltage winding, so just further increase manufacturing cost and manufacture difficulty.
Summary of the invention
Technical problem to be solved by this invention is for above shortcomings in prior art, a kind of middle pressure pressure regulation method and power auto-transformer of power auto-transformer are provided, adopt this voltage regulating mode of the present invention, can need according to design step voltage and the electric current of determining tap changer voluntarily, thus effectively reduce the cost of transformer.
The technical scheme that solution the technology of the present invention problem adopts is the middle pressure pressure regulation method of this power auto-transformer, this power auto-transformer comprises main transformer, described main transformer comprises the first core limb and is wound on series connection winding, common winding and the low pressure winding on the first core limb, wherein, described pressure regulation method comprises the steps:
Main transformer is connected in series booster transformer, and described booster transformer comprises the second core limb and the supercharging winding be wound on the second core limb and field winding, described supercharging winding is connected in series with common winding, and makes the head end of supercharging winding connect middle extrusion line sleeve pipe;
Tap-changing windings is wound on the first core limb of main transformer, and each point of contact head of shunting switch is lifted one's head with each shelves tap of tap-changing windings is respectively connected; Or, using low pressure winding simultaneously as tap-changing windings, each point of contact head of shunting switch is lifted one's head with each shelves tap of low pressure winding respectively and is connected;
Voltage is added to main transformer, and the head end of field winding and tail end are connected with the dynamic and static contact of shunting switch respectively, by changing the gear of shunting switch, add different voltage can to the field winding on the second core limb, the voltage also corresponding change thereupon of the supercharging winding on the second core limb, to realize pressing pressure regulation in this power auto-transformer.
Preferably, in main transformer, low pressure winding, tap-changing windings, common winding and series connection winding are wound on the first core limb according to order from inside to outside successively; Or,
Tap-changing windings, low pressure winding, common winding and series connection winding are wound on the first core limb according to order from inside to outside successively; Or,
Low pressure winding, common winding and series connection winding are wound on the first core limb successively according to order from inside to outside.
Preferably, this power auto-transformer also comprises an iron core, and booster transformer and main transformer share this iron core, and described first core limb and the second core limb are two different core limbs on this iron core; Or main transformer also comprises main core, the first core limb is the core limb in described main core, and booster transformer also comprises pressure regulation iron core, and the second core limb is the core limb in pressure regulation iron core.
Preferably, described main transformer is single-phase transformer, and correspondingly, booster transformer is also single-phase transformer; Or described main transformer is three-phase transformer, correspondingly, booster transformer is also three-phase transformer.
The present invention also provides a kind of power auto-transformer, comprise main transformer, described main transformer comprises the first core limb and is wound on series connection winding, common winding and the low pressure winding on the first core limb, this power auto-transformer also comprises pressure regulation unit, the booster transformer that described pressure regulation unit comprises shunting switch and is connected in series with main transformer
Described booster transformer comprises the second core limb and the supercharging winding be wound on the second core limb and field winding, described supercharging winding is connected in series with common winding, and makes the head end of supercharging winding connect middle extrusion line sleeve pipe;
Each point of contact head of described shunting switch is lifted one's head with each shelves tap of low pressure winding respectively and is connected; The head end of described field winding is connected with the dynamic and static contact of shunting switch respectively with tail end.
Preferably, in main transformer, low pressure winding, common winding and series connection winding are wound on the first core limb successively according to order from inside to outside.
Or, this power auto-transformer, comprise main transformer, described main transformer comprises the first core limb and is wound on series connection winding, common winding and the low pressure winding on the first core limb, this power auto-transformer also comprises pressure regulation unit, the booster transformer that described pressure regulation unit comprises tap-changing windings, shunting switch and is connected in series with main transformer
Described booster transformer comprises the second core limb and the supercharging winding be wound on the second core limb and field winding, described supercharging winding is connected in series with common winding, and makes the head end of supercharging winding connect middle extrusion line sleeve pipe;
Tap-changing windings is wound on the first core limb of main transformer,
Each point of contact head of described shunting switch is lifted one's head with each shelves tap of tap-changing windings respectively and is connected; The head end of described field winding can be connected with the dynamic and static contact of shunting switch respectively with tail end.
Preferably, in main transformer, low pressure winding, tap-changing windings, common winding and series connection winding are wound on the first core limb according to order from inside to outside successively; Or,
Tap-changing windings, low pressure winding, common winding and series connection winding are wound on the first core limb successively according to order from inside to outside.
Preferably, this power auto-transformer also comprises an iron core, and described booster transformer and main transformer share this iron core, and described first core limb and the second core limb are two different core limbs on described iron core; Or main transformer also comprises main core, the first core limb is the core limb in described main core, and booster transformer also comprises pressure regulation iron core, and the second core limb is the core limb in pressure regulation iron core.
Preferably, described main transformer is single-phase transformer, and correspondingly, booster transformer is also single-phase transformer; Or described main transformer is three-phase transformer, correspondingly, booster transformer is also three-phase transformer.
Under this voltage regulating mode of the present invention, due to the main flux substantially constant unshakable in one's determination of main transformer, therefore the voltage of low pressure winding produces fluctuation because of pressure regulation hardly.By adopting this voltage regulating mode, greatly reduce tap changer (i.e. shunting switch) and the electric pressure of pressure regulation tap lead (lead-in wire that the pressure regulation being connected shunting switch is lifted one's head), therefore select existing tap changer just can realize compressing into row pressure regulation in superhigh pressure autotransformer.
Pressure regulation method of the present invention is applicable to power auto-transformer, is specially adapted to high pressure or superhigh tension power transformer use, is particularly useful for the ultrahigh voltage power autotransformer that medium voltage side voltage is more than or equal to 400kV.
Accompanying drawing explanation
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;
Fig. 3 is the core construction schematic diagram that power auto-transformer of the present invention is applied to a kind of form in single-phase transformer;
Fig. 4 is the core construction schematic diagram that power auto-transformer of the present invention is applied to the another kind of form in single-phase transformer.
In figure: 1-connects winding; 2-common winding; 3-low pressure winding; 4-field winding; 5-supercharging winding; 6-tap-changing windings; 7-is unshakable in one's determination; 8-first core limb; 9-second core limb; 10-main core; 11-pressure regulation is unshakable in one's determination.
Embodiment
Below in conjunction with the accompanying drawing in the present invention, carry out clear, complete description to the technical scheme in the present invention, obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all belongs to the scope of protection of the invention.
Pressure regulation method is pressed to pass through to introduce pressure regulation unit in the present invention, pressure regulation unit specifically can comprise supercharging (Boost) transformer, this booster transformer can be a single-phase transformer), also can be a three-phase transformer (Integral three-phase transformer), namely the winding of a band voltage regulation function is drawn by main transformer, and the field winding of described booster transformer is pressurizeed, and by the head end of the common winding of the tail end of the supercharging winding of this booster transformer serial connection main transformer, make the head end of supercharging winding connect middle extrusion line sleeve pipe simultaneously, namely the head end voltage of supercharging winding is exactly the middle piezoelectricity pressure of this power auto-transformer.By changing the mode of excitation voltage, reach the supercharging of the intermediate voltage terminal to main transformer, to realize the pressure regulation to intermediate voltage terminal.This booster transformer can share an iron core with main transformer, also can arrange iron core separately independent of main transformer, namely can set up separately an iron core, using the iron core as booster transformer in addition outward at main transformer.
The middle pressure pressure regulation method of power auto-transformer provided by the invention, described power auto-transformer comprises main transformer, described main transformer comprises the first core limb and is wound on series connection winding, common winding and the low pressure winding on the first core limb, wherein, described pressure regulation method comprises the steps:
Main transformer is connected in series booster transformer, and described booster transformer comprises the second core limb and the supercharging winding be wound on the second core limb and field winding, described supercharging winding is connected in series with common winding, and makes the head end of supercharging winding connect middle extrusion line sleeve pipe;
Tap-changing windings is wound on the first core limb of main transformer, and each point of contact head of shunting switch is lifted one's head with each shelves tap of tap-changing windings is respectively connected; Or using low pressure winding simultaneously as tap-changing windings, now low pressure winding includes many grades of taps and lifts one's head, and is lifted one's head respectively by each point of contact head of shunting switch be connected with each shelves tap of low pressure winding;
Voltage is added to main transformer, and the head end of field winding and tail end are connected with the dynamic and static contact of shunting switch respectively, by changing the gear of shunting switch, add different voltage can to the field winding on the second core limb, the voltage also corresponding change thereupon of the supercharging winding on the second core limb, namely can realize pressing pressure regulation in this power auto-transformer.
The present invention also provides a kind of power auto-transformer, comprise main transformer, described main transformer comprises the first core limb and is wound on series connection winding, common winding and the low pressure winding on the first core limb, wherein, this power auto-transformer also comprises pressure regulation unit, the booster transformer that described pressure regulation unit comprises shunting switch and is connected in series with main transformer
Described booster transformer comprises the second core limb and the supercharging winding be wound on the second core limb and field winding, and supercharging winding is connected in series with winding of connecting;
Each point of contact head of described shunting switch is lifted one's head with each shelves tap of low pressure winding respectively and is connected; The head end of described field winding can be connected with the dynamic and static contact of shunting switch respectively with tail end.
Or,
The present invention also provides a kind of power auto-transformer, comprise main transformer, described main transformer comprises the first core limb and is wound on series connection winding, common winding and the low pressure winding on the first core limb, this power auto-transformer also comprises pressure regulation unit, the booster transformer that described pressure regulation unit comprises tap-changing windings, shunting switch and is connected in series with main transformer
Described booster transformer comprises the second core limb and the supercharging winding be wound on the second core limb and field winding, described supercharging winding is connected in series with common winding, and makes the head end of supercharging winding connect middle extrusion line sleeve pipe;
Tap-changing windings is wound on the first core limb of main transformer,
Each point of contact head of described shunting switch is lifted one's head with each shelves tap of tap-changing windings respectively and is connected; The head end of described field winding can be connected with the dynamic and static contact of shunting switch respectively with tail end.
For making those skilled in the art understand technical scheme of the present invention better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Embodiment 1:
The power auto-transformer that middle pressure pressure regulation method in the present embodiment is applied is a kind of ultrahigh voltage power autotransformer, and wherein, the medium voltage side voltage of this power auto-transformer is 400kV, high side voltage is 750kV.
As shown in Figure 1, this power auto-transformer comprises main transformer, and described main transformer comprises the first core limb (not shown) and is wound on series connection winding 1, common winding 2 and the low pressure winding 3 on the first core limb.
Wherein, common winding 2 forms the middle pressure winding of this power auto-transformer, and series connection winding 1 and common winding 2 are connected in series the high pressure winding of rear common this power auto-transformer of formation.Low pressure winding 3 can exchange with the position of common winding 2.Series connection winding 1 is middle part outlet.
As shown in Figure 1, the middle pressure pressure regulation method of the power auto-transformer that the present embodiment provides, specifically comprises the steps:
Main transformer is connected in series booster transformer, described booster transformer comprises the second core limb (not shown) and the supercharging winding 5 be wound on the second core limb and field winding 4, wherein, supercharging winding 5 is connected in series with common winding 2, even if the tail end of supercharging winding 5 is connected with the head end of common winding 2, the head end of supercharging winding 5 meets middle extrusion line sleeve A m, and namely the head end voltage of supercharging winding 5 is exactly the middle piezoelectricity pressure of this power auto-transformer;
Tap-changing windings is wound on the first core limb 8 of main transformer, and each point of contact head of shunting switch (such as adopt model be the shunting switch of MI-600Y-72.5/C-10193W) is lifted one's head with each shelves tap of tap-changing windings is respectively connected;
Voltage is added to main transformer, and the head end of field winding 4 and tail end are connected with the dynamic and static contact of shunting switch respectively, by changing the gear of shunting switch, different voltage is added to give the field winding 4 on the second core limb, according to electromagnetic induction principle, the voltage also corresponding change thereupon of the supercharging winding 5 on the second core limb, can realize compressing into row pressure regulation in this power auto-transformer.
Wherein, between low pressure winding 3 and tap-changing windings 6 without direct connection relational.
When adding voltage to described power auto-transformer, every grade of tap of tap-changing windings 6 just creates corresponding magnitude of voltage between lifting one's head, when the moving contact of shunting switch (tap changer) changes different tap positions, field winding 4 can obtain magnitudes of voltage different accordingly, under the effect that the voltage of field winding 4 changes, then the iron core of booster transformer 5 can produce corresponding magnetic flux, like this, under the effect of electromagnetic induction, supercharging winding 5, according to the no-load voltage ratio with field winding 4, also induces a corresponding magnitude of voltage.Because supercharging winding 5 is identical with the phase place of common winding 2, the voltage that supercharging winding 5 induces just defines with the voltage of common winding 2 and superposes, thus can reach the object of middle pressure pressure regulation.
Wherein, the middle pressure pressure regulation method in the present embodiment, had both been applicable to linearly adjust mode, was also applicable to positive and negative tune mode.When adopting linear tune mode, the concrete shunting switch adopted is linear tune switch, and such as employing model is the linear tune switch of MI-600Y-72.5/C-18180; When adopting positive and negative tune mode, the concrete shunting switch adopted is positive and negative tune switch, and such as employing model is the positive and negative tune switch of MI-600Y-72.5/C-10193W.
Power auto-transformer in the present embodiment both can be single-phase transformer, also can be Integral three-phase transformer.Specifically, this power auto-transformer adopts single-phase transformer, and namely main transformer and booster transformer are all single-phase transformers, and correspondingly, in the present embodiment, shunting switch also adopts single-phase shunting switch.
In the present embodiment, as shown in Figure 3,4, be core construction schematic diagram when power auto-transformer of the present invention is applied in two kinds of multi-form single-phase transformers.
In figure 3, described power auto-transformer also comprises an iron core 7, described booster transformer and main transformer share described unshakable in one's determination 7, and the first core limb 8 and the second core limb 9 are respectively two different core limbs on unshakable in one's determination 7, and namely booster transformer and main transformer are unshakable in one's determination altogether.Particularly, unshakable in one's determination 7 specifically four legged magnetic core is adopted.
Or as shown in Figure 4, main transformer also comprises main core 10, the first core limb 8 is the core limb in main core 10, and it is core limb in pressure regulation iron core 11 that booster transformer also comprises pressure regulation iron core 11, second core limb 9.Particularly, main core 10 and pressure regulation iron core 11 all adopt three pillar type unshakable in one's determination.
In the present embodiment, for main transformer, low pressure winding 3, tap-changing windings 6, common winding 2 and series connection winding 1 are wound on the first core limb 8 according to order from inside to outside successively; Or, also can be that tap-changing windings 6, low pressure winding 3, common winding 2 and series connection winding 1 are wound on the first core limb 8 successively according to order from inside to outside.
Embodiment 2:
The power auto-transformer that middle pressure pressure regulation method in the present embodiment is applied is a kind of ultrahigh voltage power autotransformer, and the medium voltage side voltage of this power auto-transformer is 400kV, high side voltage is 500kV.
Middle pressure pressure regulation method in the present embodiment and the difference of embodiment 1 are: as shown in Figure 2, in the present embodiment, do not configure tap-changing windings separately in this power auto-transformer, but double as tap-changing windings by the low pressure winding in main transformer.
Therefore, in the present embodiment, low pressure winding includes many grades of taps and lifts one's head, and each point of contact head of shunting switch is lifted one's head with each shelves tap of low pressure winding (being also tap-changing windings) simultaneously respectively and be connected.
Other steps of middle pressure pressure regulation method in the present embodiment are all in the same manner as in Example 1, repeat no more here.
Embodiment 3:
The present embodiment provides a kind of power auto-transformer, and the medium voltage side voltage of this power auto-transformer is 400kV, high side voltage is 500kV.
Wherein, common winding 2 forms the middle pressure winding of this power auto-transformer, and series connection winding 1 adds the high pressure winding that common winding 2 forms this power auto-transformer jointly.
As shown in Figure 2, this power auto-transformer comprises main transformer, described main transformer comprises the first core limb 8 and is wound on series connection winding 1, common winding 2 and the low pressure winding 3 on the first core limb, this power auto-transformer also comprises pressure regulation unit, the booster transformer that described pressure regulation unit comprises shunting switch and is connected in series with main transformer.
Wherein, described booster transformer comprises the second core limb 9 and the supercharging winding 5 be wound on the second core limb 9 and field winding 4, and wherein the tail end of supercharging winding 5 is connected with the head end of common winding 2, and the head end of supercharging winding 5 meets middle extrusion line sleeve A m.
In the present embodiment, because low pressure winding 3 also uses as tap-changing windings simultaneously, therefore low pressure winding comprises many grades of taps and lifts one's head, each point of contact head of shunting switch is lifted one's head with each shelves tap of low pressure winding 3 respectively and is connected, and the head end of described field winding 4 can be connected with the dynamic and static contact of shunting switch respectively with tail end.
In the present embodiment, for main transformer, low pressure winding 3, common winding 3 and series connection winding 1 are wound on the first core limb 8 successively according to order from inside to outside.In booster transformer, field winding 4 is wound on the second core limb 9, and supercharging winding 5 is wound on the outside of field winding 4; Or, also can be that supercharging winding 5 is wound on the second core limb 9, and field winding 4 is wound on the outside of supercharging winding 5.
Wherein, booster transformer and main transformer can share an iron core, also can use different iron cores separately.
As shown in Figure 3, when booster transformer and main transformer share one unshakable in one's determination time, this power auto-transformer also comprises the 7, first core limb 8 unshakable in one's determination and the second core limb 9 shares two different core limbs on iron core 7 for this.
Or, as shown in Figure 4, when booster transformer and main transformer have respectively different unshakable in one's determination time, then main transformer also comprises main core 10, first core limb is the core limb in main core 10, and it is core limb in pressure regulation iron core 11 that booster transformer also comprises pressure regulation iron core 11, second core limb 9.
In the present embodiment, this power auto-transformer both can be single-phase transformer, also can be Integral three-phase transformer.That is, described main transformer is single-phase transformer, and correspondingly, booster transformer is also single-phase transformer; Or described main transformer is three-phase transformer, correspondingly, booster transformer is also three-phase transformer.
Voltage is added to main transformer, and the head end of field winding 4 and tail end are connected with the dynamic and static contact of shunting switch respectively, by changing the gear of shunting switch, thus add different voltage to the field winding on the second core limb 9, the voltage of the supercharging winding on the second core limb also changes thereupon, to realize compressing into row pressure regulation in this power auto-transformer.
When adding voltage to this power auto-transformer, every grade of tap of low pressure winding 3 just creates corresponding magnitude of voltage between lifting one's head, when the moving contact of shunting switch (tap changer) changes different tap positions, field winding 4 can obtain corresponding different magnitude of voltage, under the effect that the voltage of field winding 4 changes, then the iron core of booster transformer can produce corresponding magnetic flux, like this, under the effect of electromagnetic induction, supercharging winding 5, according to the no-load voltage ratio with field winding 4, also induces a corresponding magnitude of voltage.Because both phase places are identical, the voltage that supercharging winding 5 induces just defines with the voltage of common winding 2 and superposes, thus can reach the object of middle pressure pressure regulation.
Embodiment 4:
The present embodiment provides a kind of ultrahigh voltage power autotransformer, and the medium voltage side voltage of this power auto-transformer is 400kV, high side voltage is 750kV.
The difference of the power auto-transformer in the power auto-transformer in the present embodiment and embodiment 3 is: as shown in Figure 1, in the present embodiment, described pressure regulation unit is except the booster transformer comprising shunting switch and be connected in series with main transformer, also comprise tap-changing windings 6, tap-changing windings 6 is wound on the first core limb 8 of main transformer.
Namely, in the present embodiment, include independent tap-changing windings 6, therefore low pressure winding 3 does not use as tap-changing windings.
Wherein, in main transformer, low pressure winding 3, tap-changing windings 6, common winding 2 and series connection winding 1 are wound on the first core limb 8 according to order from inside to outside successively; Or, also can be that tap-changing windings 6, low pressure winding 3, common winding 2 and series connection winding 1 are wound on the first core limb 8 successively according to order from inside to outside.
Described booster transformer comprises the second core limb 9 and the supercharging winding 5 be wound on the second core limb 9 and field winding 4, and wherein the tail end of supercharging winding 5 is connected with the head end of common winding 2, and the head end of supercharging winding 5 meets middle extrusion line sleeve A m.
In booster transformer, field winding 4 is wound on the second core limb 9, and supercharging winding 5 is wound on the outside of field winding 4; Or, also can be that supercharging winding 5 is wound on the second core limb 9, and field winding 4 is wound on the outside of supercharging winding 5.
In the present embodiment, each point of contact head of shunting switch is lifted one's head with each shelves tap of tap-changing windings 6 respectively and is connected; The head end of field winding 4 can be connected with the dynamic and static contact of shunting switch respectively with tail end.
Voltage is added to main transformer, and the head end of field winding 4 and tail end are connected with the dynamic and static contact of shunting switch respectively, by changing the gear of shunting switch, thus add different voltage to the field winding on the second core limb 9, the voltage of the supercharging winding on the second core limb also changes thereupon, to realize compressing into row pressure regulation in this power auto-transformer.
When adding voltage to this power auto-transformer, every grade of tap of tap-changing windings 6 just creates corresponding magnitude of voltage between lifting one's head, when the moving contact of shunting switch (tap changer) changes different tap positions, field winding 4 can obtain corresponding different magnitude of voltage, under the effect that the voltage of field winding 4 changes, then the iron core of booster transformer can produce corresponding magnetic flux, like this, under the effect of electromagnetic induction, supercharging winding 5, according to the no-load voltage ratio with field winding 4, also induces a corresponding magnitude of voltage.Because supercharging winding is identical with the phase place of common winding, the voltage that supercharging winding 5 induces just defines with the voltage of common winding 2 and superposes, thus can reach the object of middle pressure pressure regulation.
Other structures of power auto-transformer in the present embodiment are all in the same manner as in Example 3, repeat no more here.
Be understandable that, the illustrative embodiments that above execution mode is only used to principle of the present invention is described and adopts, but the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (10)
1. the middle pressure pressure regulation method of a power auto-transformer, this power auto-transformer comprises main transformer, described main transformer comprises the first core limb and is wound on series connection winding, common winding and the low pressure winding on the first core limb, it is characterized in that, described pressure regulation method comprises the steps:
Main transformer is connected in series booster transformer, and described booster transformer comprises the second core limb and the supercharging winding be wound on the second core limb and field winding, described supercharging winding is connected in series with common winding, and makes the head end of supercharging winding connect middle extrusion line sleeve pipe;
Tap-changing windings is wound on the first core limb of main transformer, and each point of contact head of shunting switch is lifted one's head with each shelves tap of tap-changing windings is respectively connected; Or, using low pressure winding simultaneously as tap-changing windings, each point of contact head of shunting switch is lifted one's head with each shelves tap of low pressure winding respectively and is connected;
Voltage is added to main transformer, and the head end of field winding and tail end are connected with the dynamic and static contact of shunting switch respectively, by changing the gear of shunting switch, add different voltage can to the field winding on the second core limb, the voltage also corresponding change thereupon of the supercharging winding on the second core limb, to realize pressing pressure regulation in this power auto-transformer.
2. the method for claim 1, is characterized in that, in main transformer, low pressure winding, tap-changing windings, common winding and series connection winding are wound on the first core limb according to order from inside to outside successively; Or,
Tap-changing windings, low pressure winding, common winding and series connection winding are wound on the first core limb according to order from inside to outside successively; Or,
Low pressure winding, common winding and series connection winding are wound on the first core limb successively according to order from inside to outside.
3. the method for claim 1, is characterized in that, this power auto-transformer also comprises an iron core, and booster transformer and main transformer share this iron core, and described first core limb and the second core limb are two different core limbs on this iron core; Or main transformer also comprises main core, the first core limb is the core limb in described main core, and booster transformer also comprises pressure regulation iron core, and the second core limb is the core limb in pressure regulation iron core.
4. the method as described in any one of claims 1 to 3, is characterized in that, described main transformer is single-phase transformer, and correspondingly, booster transformer is also single-phase transformer; Or described main transformer is three-phase transformer, correspondingly, booster transformer is also three-phase transformer.
5. a power auto-transformer, comprise main transformer, described main transformer comprises the first core limb and is wound on series connection winding, common winding and the low pressure winding on the first core limb, it is characterized in that, this power auto-transformer also comprises pressure regulation unit, the booster transformer that described pressure regulation unit comprises shunting switch and is connected in series with main transformer
Described booster transformer comprises the second core limb and the supercharging winding be wound on the second core limb and field winding, described supercharging winding is connected in series with common winding, and makes the head end of supercharging winding connect middle extrusion line sleeve pipe;
Each point of contact head of described shunting switch is lifted one's head with each shelves tap of low pressure winding respectively and is connected; The head end of described field winding is connected with the dynamic and static contact of shunting switch respectively with tail end.
6. power auto-transformer as claimed in claim 5, is characterized in that,
In main transformer, low pressure winding, common winding and series connection winding are wound on the first core limb successively according to order from inside to outside.
7. a power auto-transformer, comprise main transformer, described main transformer comprises the first core limb and is wound on series connection winding, common winding and the low pressure winding on the first core limb, it is characterized in that, this power auto-transformer also comprises pressure regulation unit, the booster transformer that described pressure regulation unit comprises tap-changing windings, shunting switch and is connected in series with main transformer
Described booster transformer comprises the second core limb and the supercharging winding be wound on the second core limb and field winding, described supercharging winding is connected in series with common winding, and makes the head end of supercharging winding connect middle extrusion line sleeve pipe;
Tap-changing windings is wound on the first core limb of main transformer,
Each point of contact head of described shunting switch is lifted one's head with each shelves tap of tap-changing windings respectively and is connected; The head end of described field winding can be connected with the dynamic and static contact of shunting switch respectively with tail end.
8. power auto-transformer as claimed in claim 7, is characterized in that,
In main transformer, low pressure winding, tap-changing windings, common winding and series connection winding are wound on the first core limb according to order from inside to outside successively; Or,
Tap-changing windings, low pressure winding, common winding and series connection winding are wound on the first core limb successively according to order from inside to outside.
9. the power auto-transformer as described in any one of claim 5 ~ 8, it is characterized in that, this power auto-transformer also comprises an iron core, and described booster transformer and main transformer share this iron core, and described first core limb and the second core limb are two different core limbs on described iron core; Or main transformer also comprises main core, the first core limb is the core limb in described main core, and booster transformer also comprises pressure regulation iron core, and the second core limb is the core limb in pressure regulation iron core.
10. the power auto-transformer as described in any one of claim 5 ~ 8, is characterized in that, described main transformer is single-phase transformer, and correspondingly, booster transformer is also single-phase transformer; Or described main transformer is three-phase transformer, correspondingly, booster transformer is also three-phase transformer.
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| CN106841875A (en) * | 2017-03-01 | 2017-06-13 | 国家电网公司 | Three-Phase Distribution Transformers temperature rise test system and method based on alternating low frequency heating |
| CN107689287A (en) * | 2017-08-17 | 2018-02-13 | 周瑞军 | A kind of adjustable auto-transformer of the flexible damping of carbon brush body and its adjusting method |
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| CN107689287B (en) * | 2017-08-17 | 2018-11-16 | 长乐圆明工业设计有限公司 | A kind of flexible adjustable auto-transformer of damping of carbon brush body |
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