CN112750603A - Voltage regulating method of high-voltage side of autotransformer, transformer body structure and autotransformer - Google Patents
Voltage regulating method of high-voltage side of autotransformer, transformer body structure and autotransformer Download PDFInfo
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- CN112750603A CN112750603A CN201911055033.5A CN201911055033A CN112750603A CN 112750603 A CN112750603 A CN 112750603A CN 201911055033 A CN201911055033 A CN 201911055033A CN 112750603 A CN112750603 A CN 112750603A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
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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
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Abstract
The invention discloses a voltage regulating method for the high-voltage side of an autotransformer, which comprises the following steps: respectively winding the low-voltage winding, the tapping winding and the common winding on the same constant-flux iron core column; respectively winding an excitation winding and a series winding on the same variable flux core limb; the series winding is connected with the common winding in series, and the excitation winding is connected with the tapping winding in series and then connected with the low-voltage winding in parallel; and adjusting the number of access turns of the tapping windings so as to change the voltage of the exciting windings on the variable-flux core limb, and correspondingly changing the voltage of the series windings on the same variable-flux core limb so as to realize the voltage regulation of the high-voltage side of the autotransformer. A body structure of the autotransformer and the autotransformer are also provided. According to the method, the tap switch with the low voltage level is used for regulating the voltage of the high-voltage side winding, so that the manufacturing difficulty of the tap switch can be reduced, and the cost of the transformer can be reduced.
Description
Technical Field
The invention belongs to the technical field of transformers, and particularly relates to a voltage regulating method of a high-voltage side of an autotransformer, a transformer body structure and the autotransformer.
Background
Autotransformers are widely used in power systems due to their cost and energy consumption leaders. An autotransformer typically self-couples the windings on the high and medium voltage sides. The corresponding high side coil portion is generally referred to as the series winding and the corresponding medium side coil portion is referred to as the common winding. In order to meet the requirement of voltage change of a high-voltage side power grid, a series winding or a common winding is generally required to be connected with a tap winding in series, and voltage adjustment is realized by adjusting the number of turns of the tap winding in series.
The voltage regulation technology of the current auto-coupling power transformer usually adopts the following solution:
(1) the variable flux voltage regulation mode of voltage regulation (namely, the tail end of a common winding is provided with a tapping winding) is carried out at a neutral point, the relative voltage regulation capacity is large, the stage capacity of a voltage regulation switch is also overlarge, the type selection of the voltage regulation switch is difficult, and the switch purchase cost is high; in addition, the variable flux voltage regulation mode can cause large voltage fluctuation of the low-voltage winding. If the low-voltage winding of the transformer is provided with a reactive power compensation device or is provided with a load, a compensation coil needs to be additionally arranged to stabilize the voltage of the low-voltage winding, so that the manufacturing cost and the manufacturing difficulty are further increased.
(2) And the tail end of the series coil is used for regulating voltage, a tapping coil is connected to the tail part of the series coil, and the voltage of the high-voltage side is regulated by regulating the number of turns of the tapping coil. The disadvantages of this voltage regulation method are: the tapping coil and the tapping switch are under extremely high voltage, the insulation structure is extremely complex, the tapping switch needs to be specially customized, and the overall safety margin is low.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and provides a voltage regulating method of the high-voltage side of an autotransformer, a transformer body structure and the autotransformer.
In order to achieve the above object, in a first aspect, an embodiment of the present invention provides a voltage regulating method for a high-voltage side of an autotransformer, where the method includes the following steps:
respectively winding the low-voltage winding, the tapping winding and the common winding on the same constant-flux iron core column; respectively winding an excitation winding and a series winding on the same variable flux core limb; the series winding is connected with the common winding in series, and the excitation winding is connected with the tapping winding in series and then connected with the low-voltage winding in parallel; and adjusting the number of access turns of the tapping windings so as to change the voltage of the exciting windings on the variable-flux core limb, and correspondingly changing the voltage of the series windings on the same variable-flux core limb so as to realize the voltage regulation of the high-voltage side of the autotransformer.
Preferably, the excitation winding and the series winding are sequentially wound on the variable magnetic flux core limb from inside to outside.
Preferably, the number of the constant-flux core legs is completely the same, the winding sequence of the low-voltage winding, the tapping winding and the common winding on each constant-flux core leg is the same, and the number of the variable-flux core legs is one.
Preferably, the connection mode of each low-voltage winding on each constant-flux core limb is as follows: connecting all the low-voltage windings in series in sequence; or, the low-voltage windings are connected in parallel in sequence, and the number of turns of the low-voltage windings is the same; the connection mode of each tapping winding on each constant magnetic flux core limb is as follows: connecting the tapping windings in series in sequence; or, the tapping windings are connected in parallel in sequence, and the number of turns of each tapping winding is the same; the connection mode of each common winding on each constant magnetic flux core limb is as follows: connecting all the common windings in series in sequence; or all the common windings are connected in parallel in sequence, and the number of turns of all the common windings is the same.
In a second aspect, an embodiment of the present invention provides an autotransformer body structure, including an iron core and a winding unit, where the iron core includes a variable flux core limb and a constant flux core limb, the winding unit includes a series winding, a common winding, a low voltage winding, a tap winding, and an excitation winding, the excitation winding and the series winding are respectively wound on the same variable flux core limb, and the low voltage winding, the tap winding, and the common winding are respectively wound on the same constant flux core limb, where the series winding is connected in series with the common winding, the excitation winding is connected in series with the tap winding, and a series structure formed by the excitation winding and the tap winding is connected in parallel with the low voltage winding.
Preferably, the excitation winding and the series winding are sequentially wound on the variable magnetic flux core limb from inside to outside.
Preferably, the number of the constant-flux core legs is completely the same, the winding sequence of the low-voltage winding, the tapping winding and the common winding on each constant-flux core leg is the same, the number of the variable-flux core legs is one, the low-voltage windings are sequentially connected in series on each constant-flux core leg, or the low-voltage windings are sequentially connected in parallel, and the number of turns of each low-voltage winding is the same; or all the tapping windings are sequentially connected in series, or all the tapping windings are sequentially connected in parallel, and the number of turns of all the tapping windings is the same; or all the common windings are sequentially connected in series, or all the common windings are sequentially connected in parallel, and the number of turns of all the common windings is the same.
Preferably, the series winding adopts a parallel structure of a middle incoming line and an upper outgoing line and a lower outgoing line; the common winding adopts a parallel structure of a middle incoming line and an upper outgoing line and a lower outgoing line.
Preferably, the iron core is a four-column iron core, which includes two main columns, two side columns, an upper iron yoke and a lower iron yoke, the two main columns are respectively a constant flux iron core column and a variable flux iron core column, and the two side columns are respectively disposed at the outer sides of the two main columns, or the iron core is a five-column iron core, which includes three main columns, two side columns, an upper iron yoke and a lower iron yoke, the three main columns are respectively a variable flux iron core column and two constant flux iron core columns, and the two side columns are respectively disposed at the outer sides of the three main columns.
In a third aspect, an embodiment of the present invention provides an autotransformer, including the body structure of the autotransformer described in the second aspect.
In the voltage regulating method for the high-voltage side of the autotransformer, the excitation winding is connected with the tapping winding in series and then connected with the low-voltage winding in parallel, and the voltage of the excitation winding on the variable-flux core limb is changed by adjusting the number of turns of the tapping winding due to the constant voltage of the low-voltage winding, so that the voltage of the series winding on the same variable-flux core limb is correspondingly changed, and the voltage regulation for the high-voltage side of the autotransformer is realized. Because the series structure formed by the excitation winding and the tapping winding is connected with the low-voltage winding in parallel, the voltage born by the tapping winding is close to the voltage grade of the low-voltage winding, so that the voltage can be regulated by using the tapping switch with the low voltage grade, the manufacturing difficulty of the tapping switch is reduced, the operation safety of the switch is improved, and the cost of the transformer is reduced. In addition, according to the transformer body structure and the autotransformer provided by the embodiment of the invention, the constant flux core limb and the variable flux core limb are integrated on the same core, so that the internal geometric dimension of a transformer oil tank is reduced, the use amount of transformer oil and steel parts is saved, and the cost of the transformer is further reduced.
Drawings
FIG. 1: the invention discloses a wiring schematic diagram of a voltage regulating method of a high-voltage side of an autotransformer in embodiment 1;
FIG. 2: a schematic diagram of a body structure of an autotransformer of embodiment 2 of the present invention;
FIG. 3: the body structure of the autotransformer of embodiment 2 of the present invention (using a single-phase four-limb core);
FIG. 4: the invention provides a body structure of an autotransformer (adopting a single-phase five-limb iron core) in embodiment 2.
In the figure: 1-a series winding; 2-excitation winding; 3-tapping winding; 4-a low voltage winding; 5-a common winding; 6-side column; 7-a permanent magnetic flux core limb; 8-variable flux core column.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention is further described in detail below with reference to the accompanying drawings and examples.
Example 1:
the embodiment provides a voltage regulating method of a high-voltage side of an autotransformer, which is applied to the autotransformer, and is a wiring schematic diagram of the autotransformer as shown in fig. 1, where the voltage regulating method includes the following steps:
step 101, respectively winding the low-voltage winding 4, the tapping winding 3 and the common winding 5 on the same constant-flux core limb.
The sequence of winding the low-voltage winding 4, the tapping winding 3 and the common winding 5 on the same constant-flux core limb can be determined according to the requirements of users.
And 102, respectively winding the excitation winding 2 and the series winding 1 on the same variable flux core limb.
And 103, connecting the series winding 1 and the common winding 5 in series, and connecting the excitation winding 2 and the tapping winding 3 in series and then connecting the low-voltage winding 4 in parallel.
Wherein, the series winding 1 is connected in series with the common winding 5 to form the high-voltage side of the autotransformer.
And 104, changing the voltage of an excitation winding on the variable magnetic flux core limb by adjusting the access turns of the tapping winding 3, so that the voltage of a series winding 1 on the same variable magnetic flux core limb is correspondingly changed, and realizing the voltage regulation of the high-voltage side of the autotransformer.
In this embodiment, the tap winding 3 is connected to the tap switch, so that one end of the tap switch is connected to the excitation winding 2, the other end of the tap switch is connected to the low-voltage winding 4, and the other end of the excitation winding 2 is connected to the other end of the low-voltage winding 4. It should be noted that, from the first and last terminals of the low voltage winding 4, the excitation winding 2 and the tap winding 3 are connected in series and then connected in parallel with the low voltage winding 4, or from the first and last terminals of the excitation winding 2, the low voltage winding 4 and the tap winding 3 are connected in series and then connected in parallel with the excitation winding 2.
Because the voltage value of the excitation winding 2 and the tap winding 3 after being connected in series is the same as the voltage of the low-voltage winding 4, and the voltage output by the low-voltage winding 4 is constant, the voltage difference of the head end and the tail end of the excitation winding 2 connected in series with the tap winding 3 can be changed by adjusting the number of the access turns of the tap winding 3 (namely changing the position of a contact terminal of a tap switch), the voltage of the series winding 1 on the same variable-flux core limb with the excitation winding 2 can be changed according to the principle of electromagnetic induction, the change is the voltage regulating range of the series winding 1, and the voltage regulating range is generally between plus or minus 15%.
Optionally, the excitation winding 2 and the series winding 1 are sequentially wound on the variable flux core limb from inside to outside.
Optionally, the number of the constant-flux core legs is exactly the same, the winding sequence of the low-voltage winding, the tap winding and the common winding on each constant-flux core leg is the same, and the number of the variable-flux core legs is one. When the number of the constant-flux core legs is two or more than two identical constant-flux core legs, the parameters such as the size, the material and the cross-sectional area of the core legs are all identical, and the sequence of each winding on each constant-flux core leg is identical. The number of the constant-flux core legs is completely the same, and the windings in the same sequence are wound, so that the capacity of the transformer is favorably expanded.
Optionally, the connection mode of each low-voltage winding on each constant-flux core limb is as follows: connecting all the low-voltage windings in series in sequence; or, the low-voltage windings are connected in parallel in sequence, and the number of turns of each low-voltage winding is the same; the connection mode of each tapping winding on each constant-flux core limb is as follows: connecting the tapping windings in series in sequence; or, the tapping windings are connected in parallel in sequence, and the number of turns of each tapping winding is the same; the connection mode of each common winding on each constant-flux core limb is as follows: connecting all the common windings in series in sequence; or all the common windings are connected in parallel in sequence, and the number of turns of all the common windings is the same.
In this embodiment, when the number of the constant magnetic flux core legs is two identical, the winding sequence of the low-voltage winding, the tapping winding and the common winding on each constant magnetic flux core leg is identical, different wiring among the same windings can be performed according to the requirement of design parameters, for example, the low-voltage windings on the two constant magnetic flux core legs can be connected in series, the number of turns of the two low-voltage windings is identical, the tapping windings on the two constant magnetic flux core legs are connected in series, the number of turns of the two tapping windings is identical, the common windings on the two constant magnetic flux core legs are connected in parallel, and the number of turns of the two common windings is identical.
Example 2:
as shown in fig. 2, this embodiment provides an autotransformer body structure, which is mainly applicable to a single-phase autotransformer, and includes an iron core and a winding unit, where the iron core includes a variable flux core limb 8 and a constant flux core limb 7, the winding unit includes a series winding 1, a common winding 5, a low-voltage winding 4, a tap winding 3, and an excitation winding 2, the excitation winding 2 and the series winding 1 are respectively wound on the same variable flux core limb 8, the low-voltage winding 4, the tap winding 3, and the common winding 5 are respectively wound on the same constant flux core limb 7, where the series winding 1 is connected in series with the common winding 5, the excitation winding 2 is connected in series with the tap winding 3, and a series structure formed by the excitation winding 2 and the tap winding 3 is connected in parallel with the low-voltage winding 4.
In this embodiment, the tapping winding 3 is connected to the tapping switch, and since the voltage value of the series connection of the excitation winding 2 and the tapping winding 3 should be the same as the voltage of the low-voltage winding 4, and the voltage output by the low-voltage winding 4 is constant, the voltage difference between the head end and the tail end of the excitation winding 2 connected in series with the tapping winding 3 can be changed by adjusting the number of turns of the tapping winding 3 (i.e. changing the position of the contact of the tapping switch), and the voltage of the series winding 1 on the same variable flux core limb as the excitation winding 2 can be changed according to the principle of electromagnetic induction, and the change is the voltage regulation range of the series winding, thereby realizing the voltage regulation of the high-voltage side of the autotransformer with the transformer body structure.
Because the series connection structure formed by the exciting winding 2 and the tapping winding 3 is connected with the low-voltage winding 4 in parallel, the voltage born by the tapping winding 3 is close to the voltage grade of the low-voltage winding 4, so that the tapping switch with the low voltage grade can be used for regulating the voltage, the manufacturing difficulty of the tapping switch is reduced, the cost of the transformer is reduced, and the running safety of the switch can be improved. Therefore, the low-voltage winding 4 in the embodiment not only needs to meet the output voltage required by a user, but also needs to supply power and excite the excitation winding 2 on the variable flux core limb.
Optionally, the excitation winding 2 and the series winding 1 are sequentially wound on the variable flux core limb from inside to outside.
Optionally, the number of the constant-flux core legs is completely the same, the winding sequence of the low-voltage winding, the tapping winding and the common winding on each constant-flux core leg is the same, the number of the variable-flux core legs is one, and the low-voltage windings are sequentially connected in series on each constant-flux core leg, or the low-voltage windings are sequentially connected in parallel, and the number of turns of each low-voltage winding is the same; or all the tapping windings are sequentially connected in series, or all the tapping windings are sequentially connected in parallel, and the number of turns of all the tapping windings is the same; or all the common windings are sequentially connected in series, or all the common windings are sequentially connected in parallel, and the number of turns of all the common windings is the same.
Optionally, the series winding 1 adopts a parallel structure of a middle incoming line and an upper outgoing line and a lower outgoing line; the common winding 5 adopts a parallel structure of a middle incoming line and an upper outgoing line and a lower outgoing line. Because the head end outlet voltage of the series winding and the public winding of the autotransformer is higher than the tail end outlet voltage, the low voltage of the series winding and the public winding is positioned at the upper end part and the lower end part of the transformer body structure by adopting a structure of middle incoming line and upper and lower outgoing lines, the voltage difference of the position to other structural parts is relatively lower, the safety of the insulation of the end parts of the transformer body structure is favorably improved, and the operation reliability of the transformer is improved.
Alternatively, as shown in fig. 3, the core is a four-leg core including two main legs, one constant-flux core leg 7 and one variable-flux core leg 8, two side legs 6, and an upper iron yoke and a lower iron yoke, and the two side legs 6 are disposed outside the two main legs, respectively.
As shown in fig. 4, the iron core is a five-limb iron core, and includes three main limbs, two side limbs 6, an upper iron yoke and a lower iron yoke, the three main limbs are respectively a variable magnetic flux iron core limb 8 and two constant magnetic flux iron core limbs 7, and the two side limbs 6 are respectively disposed at the outer sides of the three main limbs.
In this embodiment, through adopting single-phase four-limb iron core or single-phase five-limb iron core, with the integration of permanent magnetic flux core-limb and change magnetic flux core-limb in same iron core, can effectively reduce the inside geometric dimensions of transformer tank, practice thrift the quantity of transformer oil and ironware to reduce transformer cost.
Example 3:
this embodiment provides an autotransformer including the body structure of the autotransformer described in embodiment 2. For example, the ratio of the high, medium and low side voltages of the autotransformer is: 400(+4, -8) × 1.25%/330/33 (kV).
The beneficial effects of the above embodiment are as follows:
(1) the excitation winding is connected with the tapping winding in series and then connected with the low-voltage winding in parallel, so that the voltage borne by the tapping winding is close to the voltage grade of the low-voltage winding, and therefore, the tapping switch with the low voltage grade can be selected, the manufacturing difficulty of the tapping switch is greatly reduced, and the operation risk of the switch is also greatly reduced.
(2) In the method for regulating voltage at the high-voltage side of the autotransformer provided in embodiment 1, the tap winding is connected in series to the tail of the low-voltage winding, so that the voltages of the tap winding and the voltage-regulating tap lead are both very low, and the insulation structures at the tap winding and the voltage-regulating tap lead are greatly simplified.
(3) The constant flux core post and the variable flux core post are integrated on the same core, so that the internal geometric dimension of the transformer oil tank can be effectively reduced, the using amount of transformer oil and steel parts is saved, and the cost of the transformer is reduced.
(4) The low-voltage winding is used as the auxiliary winding to supply power to the excitation winding, so that an independent auxiliary winding is not required to be added, the material consumption of the transformer is further saved, and the output voltage of the low-voltage winding is not influenced.
(5) The head ends of the series winding and the public winding are preferably designed to be led out in the middle, and an upper-path and a lower-path parallel outgoing line structure is adopted, so that the safety of the end insulation of the transformer body structure is improved, and the operation reliability of the transformer is improved.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A voltage regulating method for the high voltage side of an autotransformer is characterized by comprising the following steps:
respectively winding the low-voltage winding (4), the tapping winding (3) and the common winding (5) on the same constant-flux iron core column;
respectively winding the excitation winding (2) and the series winding (1) on the same variable flux core limb;
the series winding (1) is connected with the common winding (5) in series, and the excitation winding (2) is connected with the tapping winding (3) in series and then connected with the low-voltage winding (4) in parallel;
and adjusting the number of turns of the tapping windings (3) so as to change the voltage of the exciting windings (2) on the variable flux core limb, and correspondingly changing the voltage of the series windings (1) on the same variable flux core limb so as to realize the voltage regulation of the high-voltage side of the autotransformer.
2. The method according to claim 1, characterized in that an excitation winding (2) and a series winding (1) are sequentially wound on the variable flux core limb from inside to outside.
3. The method of claim 2, wherein the number of the constant-flux core legs is identical, the winding sequence of the low-voltage winding, the tap winding and the common winding on each constant-flux core leg is identical,
the number of the variable flux core posts is one.
4. The method of claim 3, wherein each low voltage winding on each constant flux leg is connected by:
connecting all the low-voltage windings in series in sequence; or, the low-voltage windings are connected in parallel in sequence, and the number of turns of the low-voltage windings is the same;
the connection mode of each tapping winding on each constant magnetic flux core limb is as follows:
connecting the tapping windings in series in sequence; or, the tapping windings are connected in parallel in sequence, and the number of turns of each tapping winding is the same;
the connection mode of each common winding on each constant magnetic flux core limb is as follows:
connecting all the common windings in series in sequence; or all the common windings are connected in parallel in sequence, and the number of turns of all the common windings is the same.
5. A body structure of an autotransformer comprises an iron core and a winding unit, and is characterized in that the iron core comprises a variable flux core limb (8) and a constant flux core limb (7),
the winding unit comprises a series winding (1), a common winding (5), a low-voltage winding (4), a tapping winding (3) and an excitation winding (2), the excitation winding (2) and the series winding (1) are respectively wound on the same variable-flux core limb (8), the low-voltage winding (4), the tapping winding (3) and the common winding (5) are respectively wound on the same constant-flux core limb (7),
the series winding (1) is connected with the common winding (5) in series, the excitation winding (2) is connected with the tapping winding (3) in series, and a series structure formed by the excitation winding (2) and the tapping winding (3) is connected with the low-voltage winding (4) in parallel.
6. The body structure of the autotransformer as claimed in claim 5, wherein the excitation winding (2) and the series winding (1) are sequentially wound on the flux transformer core limb from inside to outside.
7. The body structure of the autotransformer as claimed in claim 6, wherein the number of the constant flux legs is equal to one, the winding sequence of the low voltage winding, the tap winding and the common winding on each constant flux leg is the same, the number of the flux legs is one,
on each constant-flux core limb, each low-voltage winding is connected in series in sequence; or, all the low-voltage windings are connected in parallel in sequence, and the number of turns of all the low-voltage windings is the same; or
Each tapping winding is connected in series in sequence; or all the tapping windings are connected in parallel in sequence, and the number of turns of all the tapping windings is the same; or
All the common windings are connected in series in sequence; or all the common windings are connected in parallel in sequence, and the number of turns of all the common windings is the same.
8. The self-coupled transformer body structure of any one of claims 5 to 7, wherein the series winding (1) adopts a parallel structure of a middle incoming line and an upper outgoing line and a lower outgoing line;
the common winding (5) adopts a parallel structure of a middle incoming line and an upper outgoing line and a lower outgoing line.
9. The body structure of an autotransformer according to claim 8, wherein said core is a four-leg core comprising two main legs, two side legs (6), and an upper yoke and a lower yoke, the two main legs being a constant flux leg (7) and a variable flux leg (8), respectively, and the two side legs being disposed outside the two main legs, respectively, or
The iron core is a five-column iron core and comprises three main columns, two side columns (6), an upper iron yoke and a lower iron yoke, wherein the three main columns are respectively a variable magnetic flux iron core column (8) and two constant magnetic flux iron core columns (7), and the two side columns are respectively arranged on the outer sides of the three main columns.
10. An autotransformer comprising the body structure of the autotransformer of any one of claims 5 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911055033.5A CN112750603A (en) | 2019-10-31 | 2019-10-31 | Voltage regulating method of high-voltage side of autotransformer, transformer body structure and autotransformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911055033.5A CN112750603A (en) | 2019-10-31 | 2019-10-31 | Voltage regulating method of high-voltage side of autotransformer, transformer body structure and autotransformer |
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| CN112750603A true CN112750603A (en) | 2021-05-04 |
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| CN201911055033.5A Pending CN112750603A (en) | 2019-10-31 | 2019-10-31 | Voltage regulating method of high-voltage side of autotransformer, transformer body structure and autotransformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236318A (en) * | 2021-10-26 | 2022-03-25 | 保定天威保变电气股份有限公司 | Flexible-direct transformer network side and valve side winding series operation impact test method |
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2019
- 2019-10-31 CN CN201911055033.5A patent/CN112750603A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114236318A (en) * | 2021-10-26 | 2022-03-25 | 保定天威保变电气股份有限公司 | Flexible-direct transformer network side and valve side winding series operation impact test method |
| CN114236318B (en) * | 2021-10-26 | 2024-03-26 | 保定天威保变电气股份有限公司 | Impact test method for series operation of windings on net side and valve side of flexible direct-current transformer |
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