CN210039901U - Transformer bank - Google Patents
Transformer bank Download PDFInfo
- Publication number
- CN210039901U CN210039901U CN201920651308.0U CN201920651308U CN210039901U CN 210039901 U CN210039901 U CN 210039901U CN 201920651308 U CN201920651308 U CN 201920651308U CN 210039901 U CN210039901 U CN 210039901U
- Authority
- CN
- China
- Prior art keywords
- double
- column
- voltage
- phase
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
-
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/346—Preventing or reducing leakage fields
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
- H01F30/12—Two-phase, three-phase or polyphase transformers
-
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F2027/348—Preventing eddy currents
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The utility model discloses a transformer bank, include: three double-column single-phase transformers; the double-column single-phase transformer comprises: the coil comprises a first iron core column, a second iron core column, a high-voltage coil and a low-voltage coil, wherein the first iron core column and the second iron core column are arranged on a rectangular frame iron core, and the high-voltage coil and the low-voltage coil are arranged on the first iron core column. The utility model provides a only contain a low-voltage coil in every iron leg, this makes do not have the magnetic coupling relation between each low-voltage coil, can not each other because of the unbalanced magnetic leakage field that appears of load, just also can not produce eddy current loss, consequently avoided the problem because of the unbalanced transformer trouble that leads to of load, simultaneously, compare the two split transformers of three-phase axial among the prior art, the utility model discloses a two split transformer groups of three-phase twin columns use safelyr, more reliable.
Description
The present application claims the priority of the aforementioned application of the invention with the application number 201811574536.9 and the application name "transformer bank" filed on 21.12.2018, and the priority of the aforementioned application of the utility model with the application number 201822159503.X and the application name "transformer bank" filed on 21.12.2018, both of which are incorporated by reference in their entirety.
Technical Field
The utility model relates to an electric power system technical field specifically is a transformer bank.
Background
A transformer is a device that changes an alternating voltage using the principle of electromagnetic induction. The method has wide application in power conversion systems in the fields of wind power generation, photovoltaic power generation, urban rail transit traction rectification, ship electric propulsion and the like, wherein in the power conversion systems, a power supply grid is connected with a converter through a transformer.
The transformer adopted in the existing power conversion system is a three-phase axial double-split transformer, each iron core column of the three-phase axial double-split transformer is provided with two high-voltage coils connected in parallel and two independent low-voltage coils, each low-voltage coil is connected with one group of converters, and under a normal working condition, two groups of converters connected with the two low-voltage coils on the same iron core column keep balanced load.
The three-phase axial double-split transformer has the problems that once loads of two groups of converters are unbalanced, even only one group of converters works in the two groups of converters, when the other group of converters is opened, a large transverse leakage magnetic field can appear to cause current distribution distortion inside a low-voltage coil, great eddy current loss is generated, a hot spot occurs locally on the low-voltage coil, and even insulation failure of the low-voltage coil can be caused, so that transformer faults are caused.
SUMMERY OF THE UTILITY MODEL
The utility model provides a transformer bank can solve among the prior art because the two split transformers of three-phase axial that electric power conversion system adopted break down easily when the converter load is unbalanced problem.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a transformer bank, comprising: three double-column single-phase transformers; wherein:
the three double-column single-phase transformers form a three-phase double-column double-split transformer bank;
each double-column single-phase transformer comprises: the coil comprises a first iron core column, a second iron core column, a high-voltage coil and a low-voltage coil, and a high-voltage coil and a low-voltage coil, wherein the first iron core column and the second iron core column are arranged on a rectangular frame iron core;
the high-voltage coils of the first iron core columns of the three double-column single-phase transformers are connected to form a first group of high-voltage terminals of the three-phase double-column double-split transformer bank;
the high-voltage coils of the second iron core columns of the three double-column single-phase transformers are connected with a second group of high-voltage terminals forming the three-phase double-column double-split transformer bank;
the low-voltage coils of the first iron core columns of the three double-column single-phase transformers are connected to form a first group of low-voltage terminals of the three-phase double-column double-split transformer bank;
and the low-voltage coils of the second iron core columns of the three double-column single-phase transformers are connected to form a second group of low-voltage terminals of the three-phase double-column double-split transformer bank.
Optionally, the high-voltage coils on the first iron leg of the three double-leg single-phase transformers constituting the three-phase double-limb double-split transformer bank are connected in a delta connection manner or a star connection manner, so as to obtain a first group of high-voltage terminals; high-voltage coils on a second iron core column in three double-column single-phase transformers forming the three-phase double-column double-split transformer bank are connected in the same way as the high-voltage coils on the first iron core column, and a second group of high-voltage terminals are obtained;
the high-voltage terminals with the same name in the first group of high-voltage terminals and the second group of high-voltage terminals are connected in parallel to form the high-voltage terminal of the three-phase double-column double-split transformer bank.
Optionally, the low-voltage coils on the first core limb in the three double-limb single-phase transformers constituting the three-phase double-limb double-split transformer bank are connected in a delta connection or star connection manner, so as to obtain a first group of low-voltage terminals; and low-voltage coils on second iron core columns in three double-column single-phase transformers forming the three-phase double-column double-split transformer bank are connected in a delta connection method or a star connection method to obtain a second group of low-voltage terminals.
Optionally, the first set of low voltage terminals are connected to a first set of electrical devices; the second set of low voltage terminals are connected to a second set of electrical devices.
Optionally, simultaneously operating the first set of electrical devices and the second set of electrical devices,
or only one set of electrical devices of the first set of electrical devices and the second set of electrical devices may be operated at the same time.
Optionally, when the connection method of the first group of low-voltage coils is the same as that of the second group of low-voltage coils, the low-voltage terminals of the same name in the first group of low-voltage terminals and the second group of low-voltage terminals are connected in parallel to form the low-voltage terminal of the three-phase double-column double-split transformer bank, and the low-voltage terminal of the three-phase double-column double-split transformer bank is connected with one or more groups of electrical devices.
Optionally, the three-phase double-column double-split transformer bank is installed inside a tower, inside a nacelle, in a nacelle basket, or on an equipment platform outside the tower of the wind turbine generator system.
Optionally, the dual-column single-phase transformer comprises: a dual-column single-phase resin-insulated dry-type transformer, a dual-column single-phase oil-immersed transformer, or a dual-column single-phase gas-insulated transformer.
Optionally, the dual-column single-phase transformer further includes: a housing, a cooling system, and a protective device.
Optionally, the connection groups of the three-phase double-column double-split transformer group respectively comprise Dy1, Dy5, Dy11, Dyn1yn1, Dyn5yn5 Dyn11yn11, Dd0yn1, Dd0yn5, Dd0yn11, YNd1y0, YNd5y0, YNd11y0, YNd1d1, YNd5d5 and YNd11d 11;
wherein Dy1 represents that a high-voltage coil on a first column and a high-voltage coil on a second column in three double-column single-phase transformers of the three-phase double-column double-split transformer bank are connected in a triangular mode, a low-voltage coil on the first column and a low-voltage coil on the second column are connected in a star mode, and the phase difference between high voltage and low voltage is 30 degrees;
dy5 represents that a high-voltage coil on a first column and a high-voltage coil on a second column in three double-column single-phase transformers of the three-phase double-column double-split transformer bank are connected in a triangular mode, a low-voltage coil on the first column and a low-voltage coil on the second column are connected in a star mode, and the phase difference between high voltage and low voltage is 150 degrees;
dy11 represents that a high-voltage coil on a first column and a high-voltage coil on a second column in three double-column single-phase transformers of the three-phase double-column double-split transformer bank are connected in a triangular mode, a low-voltage coil on the first column and a low-voltage coil on the second column are connected in a star mode, and the phase difference between high voltage and low voltage is 30 degrees;
dyn1yn1 shows that a high-voltage coil on a first column and a high-voltage coil on a second column in three double-column single-phase transformers of a three-phase double-column double-split transformer group are connected in a triangular mode, a low-voltage coil on the first column is connected in a star mode and is led out through a neutral point, the phase difference between high voltage and low voltage is 30 degrees, a low-voltage coil on the second column is connected in a star mode and is led out through a neutral point, and the phase difference between the high voltage and the low voltage is 30 degrees;
dyn5yn5 shows that a high-voltage coil on a first column and a high-voltage coil on a second column in three double-column single-phase transformers of a three-phase double-column double-split transformer group are connected in a triangular mode, a low-voltage coil on the first column is connected in a star mode and is led out through a neutral point, the phase difference between high voltage and low voltage is 150 degrees, a low-voltage coil on the second column is connected in a star mode and is led out through a neutral point, and the phase difference between the high voltage and the low voltage is 150 degrees;
dyn11yn11 shows that a high-voltage coil on a first column and a high-voltage coil on a second column in three double-column single-phase transformers of a three-phase double-column double-split transformer group are connected in a triangular mode, a low-voltage coil on the first column is connected in a star mode and is led out through a neutral point, the phase difference between high voltage and low voltage is 30 degrees, a low-voltage coil on the second column is connected in a star mode and is led out through a neutral point, and the phase difference between the high voltage and the low voltage is 30 degrees;
the Dd0yn1 indicates that the high-voltage coil on the first column and the high-voltage coil on the second column in three double-column single-phase transformers of the three-phase double-column double-split transformer bank are connected in a delta manner, the low-voltage coil on the first column is connected in a delta manner, the phase difference between the high voltage and the low voltage is 0, the low-voltage coil on the second column is connected in a star manner and is led out by a neutral point, and the phase difference between the high voltage and the low voltage is 30 degrees;
the Dd0yn5 indicates that the high-voltage coil on the first column and the high-voltage coil on the second column in three double-column single-phase transformers of the three-phase double-column double-split transformer bank are connected in a delta manner, the low-voltage coil on the first column is connected in a delta manner, the phase difference between the high voltage and the low voltage is 0, the low-voltage coil on the second column is connected in a star manner and is led out by a neutral point, and the phase difference between the high voltage and the low voltage is 150 degrees;
the Dd0yn11 indicates that the high-voltage coil on the first column and the high-voltage coil on the second column in three double-column single-phase transformers of the three-phase double-column double-split transformer bank are connected in a delta manner, the low-voltage coil on the first column is connected in a delta manner, the phase difference between the high voltage and the low voltage is 0, the low-voltage coil on the second column is connected in a star manner and is led out by a neutral point, and the phase difference between the high voltage and the low voltage is 30 degrees;
the YNd1y0 shows that a high-voltage coil on a first column and a high-voltage coil on a second column in three double-column single-phase transformers of a three-phase double-column double-split transformer bank are connected in a star shape and are led out by neutral points, a low-voltage coil on the first column is connected in a triangle shape, the phase difference of high voltage and low voltage is 30 degrees, a low-voltage coil on the second column is connected in a star shape, and the phase difference of high voltage and low voltage is 0 degree;
the YNd5y0 shows that a high-voltage coil on a first column and a high-voltage coil on a second column in three double-column single-phase transformers of a three-phase double-column double-split transformer bank are connected in a star shape and are led out by neutral points, a low-voltage coil on the first column is connected in a triangle shape, the phase difference of high voltage and low voltage is 150 degrees, a low-voltage coil on the second column is connected in a star shape, and the phase difference of high voltage and low voltage is 0 degree;
the YNd11y0 shows that a high-voltage coil on a first column and a high-voltage coil on a second column in three double-column single-phase transformers of a three-phase double-column double-split transformer bank are connected in a star shape and are led out by neutral points, a low-voltage coil on the first column is connected in a triangle shape, the phase difference of high voltage and low voltage is 30 degrees, a low-voltage coil on the second column is connected in a star shape, and the phase difference of high voltage and low voltage is 0 degree;
the YNd1d1 shows that a high-voltage coil on a first column and a high-voltage coil on a second column in three double-column single-phase transformers of a three-phase double-column double-split transformer bank are connected in a star shape and are led out by neutral points, a low-voltage coil on the first column is connected in a triangle shape, the phase difference of high voltage and low voltage is 30 degrees, a low-voltage coil on the second column is connected in a triangle shape, and the phase difference of high voltage and low voltage is 30 degrees;
the YNd5d5 shows that a high-voltage coil on a first column and a high-voltage coil on a second column in three double-column single-phase transformers of a three-phase double-column double-split transformer bank are connected in a star shape and are led out by neutral points, a low-voltage coil on the first column is connected in a triangle shape, the phase difference of high voltage and low voltage is 150 degrees, a low-voltage coil on the second column is connected in a triangle shape, and the phase difference of high voltage and low voltage is 150 degrees;
YNd11d11 shows that high-voltage coils on a first column and high-voltage coils on a second column in three double-column single-phase transformers of a three-phase double-column double-split transformer bank are connected in a star shape and are led out through neutral points, low-voltage coils on the first column are connected in a triangle shape, the phase difference of high voltage and low voltage is 30 degrees, low-voltage coils on the second column are connected in a triangle shape, and the phase difference of high voltage and low voltage is 30 degrees.
According to the above technical scheme, the utility model discloses a transformer bank, include: three double-column single-phase transformers; the double-column single-phase transformer comprises: the coil comprises a first iron core column, a second iron core column, a high-voltage coil and a low-voltage coil, wherein the first iron core column and the second iron core column are arranged on a rectangular frame iron core, and the high-voltage coil and the low-voltage coil are arranged on the first iron core column. The utility model provides a only contain a low-voltage coil in every iron leg, this makes do not have the magnetic coupling relation between each low-voltage coil, can not each other because of the unbalanced magnetic leakage field that appears of load, just also can not produce eddy current loss, consequently avoided the problem because of the unbalanced transformer trouble that leads to of load, simultaneously, compare the two split transformers of three-phase axial among the prior art, the utility model discloses a two split transformer groups of three-phase twin columns use safelyr, more reliable.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a front plan view of a transformer bank according to an embodiment of the present invention;
fig. 2 is a Dyy connection schematic diagram of the embodiment of the utility model discloses a three-phase double-column double-split transformer bank;
fig. 3 is a schematic diagram of the connection of a three-phase double-column double-split transformer set YNdy disclosed by the embodiment of the invention;
fig. 4 is a schematic diagram of the connection of a three-phase double-column double-split transformer set YNdd disclosed in the embodiment of the present invention;
fig. 5 is a schematic diagram of a three-phase double-column double-split transformer set Ddy according to an embodiment of the present invention;
fig. 6 is a back plan view of a transformer assembly according to an embodiment of the present invention;
fig. 7 is a front perspective view of a transformer assembly according to an embodiment of the present invention;
fig. 8 is a rear side elevational view of a transformer assembly according to an embodiment of the present invention;
fig. 9 is a Dyy coil connection diagram disclosed in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a transformer bank can solve among the prior art because the two split transformers of three-phase axial that electric power conversion system adopted break down easily when the converter load is unbalanced problem.
As shown in fig. 1, the embodiment of the utility model discloses a transformer bank, include:
three double-column single-phase transformers; wherein: the three double-column single-phase transformers form a three-phase double-column double-split transformer bank. The three double-column single-phase transformers are respectively a first double-column single-phase transformer 1001, a second double-column single-phase transformer 1002 and a third double-column single-phase transformer 1003.
The double-column single-phase transformer comprises: a first leg 1019, a second leg 1016 of a rectangular frame core, a high voltage coil 1021 and a low voltage coil 1020 provided on the first leg, and a high voltage coil 1018 and a low voltage coil 1017 provided on the second leg.
The low-voltage coil 1020 on the first core limb 1019 and the low-voltage coil 1017 on the second core limb of the double-limb single-phase transformer form a double-limb double-split structure.
The high-voltage coil 1021 of the first iron leg 1019 of the three double-column single- phase transformers 1001, 1002 and 1003 is connected with a first group of high-voltage terminals forming the three-phase double-column double-split transformer bank.
The high-voltage coils 1018 of the second core limb 1016 of the three double-column single- phase transformers 1001, 1002 and 1003 are connected to form a second group of high-voltage terminals of the three-phase double-column double-split transformer bank.
The low-voltage coils 1020 of the first iron leg 1019 of the three double-column single- phase transformers 1001, 1002 and 1003 are connected to form a first group of low-voltage terminals of the three-phase double-column double-split transformer bank.
And the low-voltage coil 1017 of the second iron leg 1016 of the three double-column single- phase transformers 1001, 1002 and 1003 is connected with a second group of low-voltage terminals forming the three-phase double-column double-split transformer bank.
In a specific application, the high-voltage terminal of the transformer bank is connected with a power supply grid, and the low-voltage terminal is connected with the electrical equipment, so that the grid voltage is converted into the voltage which can be used by the electrical equipment.
The present embodiment provides a transformer bank including: three double-column single-phase transformers; the double-column single-phase transformer comprises: the coil comprises a first iron core column, a second iron core column, a high-voltage coil and a low-voltage coil, wherein the first iron core column and the second iron core column are arranged on a rectangular frame iron core, and the high-voltage coil and the low-voltage coil are arranged on the first iron core column. The utility model provides a only contain a low-voltage coil in every iron leg, this makes do not have the magnetic coupling relation between each low-voltage coil, can not each other because of the unbalanced magnetic leakage field that appears of load, just also can not produce eddy current loss, consequently avoided the problem because of the unbalanced transformer trouble that leads to of load, simultaneously, compare the two split transformers of three-phase axial among the prior art, the utility model discloses a two split transformer groups of three-phase twin columns use safelyr, more reliable.
It should be noted that, the utility model discloses a three-phase twin columns double split dry-type transformer bank function is complete, can replace the same single three-phase axial double split transformer of each rated value completely.
For example, a grid-connected transformer is configured in a 6MW wind generating set, a three-phase double-column double-split dry type transformer bank connected by Dyy is adopted, and the rated values of the transformer bank are as follows:
a three-phase double-column double-split dry type transformer bank is provided with the rated capacity of 7500kVA, the rated voltage of 35/0.69kV and the short circuit impedance of 10 percent. The rated capacity of a double-column single-phase transformer adopted in the three-phase double-column double-split dry type transformer group is 2500KVA, the rated high-voltage is 35kV, and the rated low-voltage is 0.4 kV. The capacities of all the first column high-voltage coils and the second column high-voltage coils are 1250kVA, and the high-voltage is 35 kV. The capacities of all the first column low-voltage coils and the second column low-voltage coils are 1250kVA, and the low-voltage is 0.4 kV.
According to the above, this two split dry-type transformer banks of three-phase twin columns can satisfy 6MW wind generating set's vary voltage demand completely, the utility model discloses a transformer bank function is complete, can replace the same two split transformers of single three-phase axial of each rated value.
Optionally, in the transformer bank disclosed in another embodiment of the present application, a connection manner of the first group of high-voltage terminals and the second high-voltage terminals of the three-phase double-column double-split transformer bank is as follows: and (4) triangular connection.
Fig. 2 is a schematic diagram of the connection of a three-phase double-column double-split transformer bank. In FIG. 2, HV11Is a first column high-voltage coil, HV, in a first double-column single-phase transformer12Is a first column high-voltage coil, HV, in a second double-column single-phase transformer13Is a first column high-voltage coil, LV, of a third double-column single-phase transformer11For the first pole low-voltage coil, LV, in the first double-pole single-phase transformer12A second double-column single-phase transformationFirst pole low voltage coil, LV, in the machine13Is a first column low-voltage coil, HV, in a third double-column single-phase transformer21Is a second column high-voltage coil, HV, in a first double-column single-phase transformer22Is a second column high-voltage coil, HV, in a second double-column single-phase transformer23For the second column high-voltage coil, LV, of the third double-column single-phase transformer21For the second low-voltage coil, LV, of the first double-pole single-phase transformer22For the second low-voltage coil, LV, of the second double-pole single-phase transformer23Is a second column low-voltage coil in a third double-column single-phase transformer.
Specifically, a first column high-voltage coil HV in a first double-column single-phase transformer11The first end of the first double-column single-phase transformer and the first column high-voltage coil HV in the third double-column single-phase transformer13Is connected with the second end of the first double-pole single-phase transformer, and a first pole high-voltage coil HV in the first double-pole single-phase transformer11The second end of the first double-column single-phase transformer and the first column high-voltage coil HV in the second double-column single-phase transformer12Is connected with the first end of the first column high-voltage coil HV in the second double-column single-phase transformer12The second end of the first double-column single-phase transformer and the first column high-voltage coil HV in the third double-column single-phase transformer13Is connected to a first terminal of HV11、HV12、HV13Form a triangular connection, HV11And HV13The connection end of (A) is a high-voltage terminal A1, HV11And HV12The connection end of (A) is a high-voltage terminal B1, HV12And HV13The connecting end of the high-voltage terminal A1, the connecting end of the high-voltage terminal B1 and the connecting end of the high-voltage terminal C1 form a first group of high-voltage terminals C1.
Second column high-voltage coil HV in first double-column single-phase transformer21The first end of the first double-column single-phase transformer and the second high-voltage coil HV in the third double-column single-phase transformer23The second end of the first double-column single-phase transformer is connected with a second column high-voltage coil HV in the first double-column single-phase transformer21The second end of the first double-column single-phase transformer and a second high-voltage coil HV in a second double-column single-phase transformer22The first end of the second double-pole single-phase transformer is connected with the second pole high-voltage coil HV in the second double-pole single-phase transformer22The second end of the first double-column single-phase transformer and a second high-voltage coil HV in a third double-column single-phase transformer23Is connected to a first terminal of HV21、HV22、HV23Form a triangular connection, HV21And HV23The connection end of (A) is a high-voltage terminal A2, HV21And HV22The connection end of (A) is a high-voltage terminal B2, HV22And HV23The connecting end of the high-voltage terminal A is a high-voltage terminal C2, and the high-voltage terminals A2, B2 and C2 form a second group of high-voltage terminals.
The high-voltage terminal A1 in the first group of high-voltage terminals is connected in parallel with the high-voltage terminal A2 in the second group of high-voltage terminals, the high-voltage terminal B1 in the first group of high-voltage terminals is connected in parallel with the high-voltage terminal B2 in the second group of high-voltage terminals, and the high-voltage terminal C1 in the first group of high-voltage terminals is connected in parallel with the high-voltage terminal C2 in the second group of high-voltage terminals, so that the high-voltage terminal A, B, C of the three-phase double-column double-split transformer bank is formed.
When the three-phase double-column double-split transformer bank is applied specifically, the unified high-voltage terminal A, B, C of the three-phase double-column double-split transformer bank is merged into a power grid.
Optionally, in the transformer bank disclosed in another embodiment of the present application, a connection manner of the first group of high-voltage terminals and the second high-voltage terminals of the three-phase double-column double-split transformer bank is as follows: and (4) star connection.
Specifically, as shown in fig. 3, the first-pole high-voltage coil HV of the first double-pole single-phase transformer11The first end of the first double-column single-phase transformer and the first column high-voltage coil HV in the second double-column single-phase transformer12The first end of the third double-column single-phase transformer and the first column high-voltage coil HV in the third double-column single-phase transformer13The first end of the second end is connected with the third end of the first end, HV11、HV12、HV13Form a first-column high-voltage coil HV in a star-connected, first double-column single-phase transformer11As a high-voltage terminal A1, a first-column high-voltage coil HV in a second double-column single-phase transformer12As a high-voltage terminal B1, and a first-column high-voltage coil HV in a third two-column single-phase transformer13As a high voltage terminal C1, the high voltage terminals a1, B1, C1 constitute a first group of high voltage terminals.
Second column high-voltage coil HV in first double-column single-phase transformer21The first end of,Second column high-voltage coil HV in second double-column single-phase transformer22The first end of the third double-column single-phase transformer and the second column high-voltage coil HV in the third double-column single-phase transformer23The first end of the second end is connected with the third end of the first end, HV21、HV22、HV23Form a second column high-voltage coil HV in a star connection, a first double-column single-phase transformer21As a high-voltage terminal a1, and a second high-voltage coil HV of a second two-pole single-phase transformer22As a high-voltage terminal B1, and a second high-voltage coil HV of a third two-pole single-phase transformer23As a high voltage terminal C1, the high voltage terminals a1, B1, C1 constitute a second group of high voltage terminals.
The high-voltage terminal A1 in the first group of high-voltage terminals is connected in parallel with the high-voltage terminal A2 in the second group of high-voltage terminals, the high-voltage terminal B1 in the first group of high-voltage terminals is connected in parallel with the high-voltage terminal B2 in the second group of high-voltage terminals, and the high-voltage terminal C1 in the first group of high-voltage terminals is connected in parallel with the high-voltage terminal C2 in the second group of high-voltage terminals, so that the high-voltage terminal A, B, C of the three-phase double-column double-split transformer bank is formed.
Optionally, in the transformer bank disclosed in another embodiment of the present application, a connection manner of the first group of low-voltage terminals and the second low-voltage terminals of the three-phase double-column double-split transformer bank is as follows: and (4) star connection.
Specifically, as shown in fig. 2, the first-pole low-voltage coil LV of the first dual-pole single-phase transformer11First pole low-voltage coil LV in first end and second double-pole single-phase transformer12First pole low-voltage coil LV in first end and third double-pole single-phase transformer13The first end of the first switch is connected with the three ends of the second switch, LV11、LV12、LV13Form a first-pole low-voltage coil LV in a first double-pole single-phase transformer11As a low voltage terminal a1, the first pole low voltage coil LV of the second two-pole single-phase transformer12As a low-voltage terminal b1, and a first-pole low-voltage coil LV of a third two-pole single-phase transformer13A second terminal of the first terminal is used as a low voltage terminal c1, a terminal formed by connecting the three terminals is used as a low voltage terminal n1, and a low voltage terminal a1B1, c1, n1 constitute a first group of low voltage terminals.
Second-column low-voltage coil LV in first double-column single-phase transformer21First end of the first double-pole single-phase transformer, and second low-voltage coil LV in second double-pole single-phase transformer22First end of the first double-pole single-phase transformer, and second low-voltage coil LV in third double-pole single-phase transformer23The first end of the first switch is connected with the three ends of the second switch, LV21、LV22、LV23Form a star connection, a second low-voltage coil LV in a first double-pole single-phase transformer21As a low voltage terminal a2, and a second low voltage coil LV of a second two-pole single-phase transformer22As a low-voltage terminal b2, and a second low-voltage coil LV of a third two-pole single-phase transformer23The second end of the low-voltage terminal c2 is used as a low-voltage terminal n2, the three ends are connected to form an end point, and the low-voltage terminals a2, b2, c2 and n2 form a second group of low-voltage terminals.
Optionally, the first group of low-voltage terminals a1, b1, c1 and n1 are connected to a first group of electrical devices, and the second group of low-voltage terminals a2, b2, c2 and n2 are connected to a second group of electrical devices.
It should be noted that the electrical device is generally a current transformer.
Optionally, the first set of electrical devices and the second set of electrical devices are operated simultaneously, or only one set of electrical devices of the first set of electrical devices and the second set of electrical devices are operated at the same time.
It should be noted that, the first group of electrical devices and the second group of electrical devices are independent from each other, and the two groups of electrical devices may operate simultaneously, or only one of the groups of electrical devices may operate, and the other group of electrical devices may be turned off.
In specific application, when one of the two groups of electrical equipment fails or wind power resources are insufficient, only one group of converters can be operated in order to reduce equipment loss, so that the flexibility of operation of the electrical equipment is greatly improved, and the economic benefit is further ensured.
Optionally, the low-voltage terminal a1 in the first group of low-voltage terminals is connected in parallel with the low-voltage terminal a2 in the second group of low-voltage terminals, the low-voltage terminal b1 in the first group of low-voltage terminals is connected in parallel with the low-voltage terminal b2 in the second group of low-voltage terminals, the low-voltage terminal c1 in the first group of low-voltage terminals is connected in parallel with the low-voltage terminal c2 in the second group of low-voltage terminals, and the low-voltage terminal n1 in the first group of low-voltage terminals is connected in parallel with the low-voltage terminal n2 in the second group of low-voltage terminals, so that the low-voltage terminals a, b, c and n of the three-phase double-column double.
Optionally, in the transformer bank disclosed in another embodiment of the present application, a connection manner of the first group of low-voltage terminals and the second low-voltage terminals of the three-phase double-column double-split transformer bank is as follows: and (4) triangular connection.
Specifically, as shown in fig. 4, the first-pole low-voltage coil LV of the first dual-pole single-phase transformer11First end of the first double-pole single-phase transformer and a first pole low-voltage coil LV in a third double-pole single-phase transformer13Is connected with the second end of the first double-pole single-phase transformer, and a first pole low-voltage coil LV in the first double-pole single-phase transformer11The second end of the first double-pole single-phase transformer and the first pole low-voltage coil LV in the second double-pole single-phase transformer12The first end of the first double-pole single-phase transformer is connected with the first pole low-voltage coil LV in the second double-pole single-phase transformer12The second end of the first double-pole single-phase transformer and the first pole low-voltage coil LV in the third double-pole single-phase transformer13Are connected at a first end, LV11、LV12、LV13Form a triangular connection, LV11And LV13Is connected with a low-voltage terminal a1, LV11And LV12Is connected to the low-voltage terminal b1, LV12And LV13The connecting end of (2) is a low voltage terminal c1, and the low voltage terminals a1, b1 and c1 form a first group of low voltage terminals.
Second-column low-voltage coil LV in first double-column single-phase transformer21The first end of the first double-pole single-phase transformer and the second low-voltage coil LV in the third double-pole single-phase transformer23Is connected with the second end of the first double-pole single-phase transformer, and the second low-voltage coil LV in the first double-pole single-phase transformer21The second end of the first double-pole single-phase transformer and a second low-voltage coil LV in a second double-pole single-phase transformer22The first end of the first double-pole single-phase transformer is connected with the second pole low-voltage coil LV in the second double-pole single-phase transformer22The second end of the first double-column single-phase transformer and the second end of the third double-column single-phase transformerPole low-voltage coil LV23Are connected at a first end, LV21、LV22、LV23Form a triangular connection, LV21And LV23Is connected with a low-voltage terminal a2, LV21And LV22Is connected to the low-voltage terminal b2, LV22And LV23The connection end of (2) is a low voltage terminal c2, and the low voltage terminals a2, b2 and c2 form a second group of low voltage terminals.
Optionally, the first group of low-voltage terminals a1, b1, c1 are connected to a first group of electrical devices, and the second group of low-voltage terminals a2, b2, c2 are connected to a second group of electrical devices.
Optionally, the low-voltage terminal a1 in the first group of low-voltage terminals is connected in parallel with the low-voltage terminal a2 in the second group of low-voltage terminals, the low-voltage terminal b1 in the first group of low-voltage terminals is connected in parallel with the low-voltage terminal b2 in the second group of low-voltage terminals, and the low-voltage terminal c1 in the first group of low-voltage terminals is connected in parallel with the low-voltage terminal c2 in the second group of low-voltage terminals, so as to form the low-voltage terminals a, b and c of the three-phase double-column double-split transformer bank, and connect one or more groups of.
Optionally, in the transformer bank disclosed in another embodiment of the present application, a connection manner of a first group of low-voltage terminals of the three-phase double-column double-split transformer bank is as follows: triangular connection; the connection mode of the second group low-voltage terminal of the three-phase double-column double-split transformer bank is as follows: and (4) star connection.
Specifically, as shown in fig. 5, the first-pole low-voltage coil LV of the first dual-pole single-phase transformer11First end of the first double-pole single-phase transformer and a first pole low-voltage coil LV in a third double-pole single-phase transformer13Is connected with the second end of the first double-pole single-phase transformer, and a first pole low-voltage coil LV in the first double-pole single-phase transformer11The second end of the first double-pole single-phase transformer and the first pole low-voltage coil LV in the second double-pole single-phase transformer12The first end of the first double-pole single-phase transformer is connected with the first pole low-voltage coil LV in the second double-pole single-phase transformer12The second end of the first double-pole single-phase transformer and the first pole low-voltage coil LV in the third double-pole single-phase transformer13Are connected at a first end, LV11、LV12、LV13Form a triangular connection, LV11And LV13Is connected with a low-voltage terminal a1, LV11And LV12Is connected to the low-voltage terminal b1, LV12And LV13The connecting end of (2) is a low voltage terminal c1, and the low voltage terminals a1, b1 and c1 form a first group of low voltage terminals.
Second-column low-voltage coil LV in first double-column single-phase transformer21First end of the first double-pole single-phase transformer, and second low-voltage coil LV in second double-pole single-phase transformer22First end of the first double-pole single-phase transformer, and second low-voltage coil LV in third double-pole single-phase transformer23The first end of the first switch is connected with the three ends of the second switch, LV21、LV22、LV23Form a star connection, a second low-voltage coil LV in a first double-pole single-phase transformer21As a low voltage terminal a2, and a second low voltage coil LV of a second two-pole single-phase transformer22As a low-voltage terminal b2, and a second low-voltage coil LV of a third two-pole single-phase transformer23The second end of the low-voltage terminal c2 is used as a low-voltage terminal n2, the three ends are connected to form an end point, and the low-voltage terminals a2, b2, c2 and n2 form a second group of low-voltage terminals.
The first group of low-voltage terminals a1, b1 and c1 are connected with a first group of electric devices, and the second group of low-voltage terminals a2, b2, c2 and n2 are connected with a second group of electric devices.
In fig. 1, the first limb low-voltage terminal a1, the first limb low-voltage terminal n1, the first limb low-voltage terminal b1 and the first limb low-voltage terminal c1 of the three-phase double-limb double-split transformer bank are 1009, 1010 and 1012, respectively.
As shown in fig. 6, it is a top view of the transformer bank of the present invention. Here, 2001 is a second column low-voltage terminal a2, 2002 is a second column low-voltage terminal n2, 2003 is a second column low-voltage terminal b2, and 2004 is a second column low-voltage terminal c 2.
As shown in fig. 7, a front view of the transformer assembly of the present invention is shown. The high-voltage terminal of the three-phase double-column double-split transformer bank is a phase A high-voltage terminal of the three-phase double-column double-split transformer bank, the phase B high-voltage terminal of the three-phase double-column double-split transformer bank is a phase C high-voltage terminal of the three-phase double-column double-split transformer bank, the phase a1 is a phase a low-voltage terminal of a first group low-voltage terminal, the phase B1 is a phase B low-voltage terminal of the first group low-voltage terminal, the phase C1 is a phase C low-voltage terminal of the first group low-.
As shown in fig. 8, is a rear view of the transformer assembly of the present invention. The high-voltage terminal of the three-phase double-column double-split transformer bank is a phase A high-voltage terminal of the three-phase double-column double-split transformer bank, the phase B high-voltage terminal of the three-phase double-column double-split transformer bank is a phase C high-voltage terminal of the three-phase double-column double-split transformer bank, the phase a2 is a phase a low-voltage terminal of a second group low-voltage terminal, the phase B2 is a phase B low-voltage terminal of the second group low-voltage terminal, the phase C2 is a phase C low-voltage terminal of the second group low-.
Note that, as shown in fig. 2, the high-voltage coil HV on the first limb of the three-limb double-split transformer bank of the three-phase double-limb double-split transformer group11、HV12、HV13And a high-voltage coil HV on the second column21、HV22、HV23All adopt a delta connection method, a low-voltage coil LV on the first column11、LV12、LV13And a low voltage coil LV on the second column21、LV22、LV23All adopt star connection, and the connection structure is called Dyy or Dynyn coil connection, as shown in fig. 9, which is a Dyy coil connection diagram.
Note that, as shown in fig. 5, the high-voltage coil HV on the first limb of the three-limb double-split transformer bank of the three-phase double-limb double-split transformer group11、HV12、HV13And a high-voltage coil HV on the second column21、HV22、HV23All adopt a delta connection method, a low-voltage coil LV on the first column11、LV12、LV13The low-voltage coil LV on the second column is connected by adopting a delta connection method21、LV22、LV23All using a wye connection, this connection configuration is called Ddy or Ddyn coil connection.
It should be noted that, as shown in fig. 3, three twin-column single-phase transformers of the three-phase twin-column double split transformer bankHigh voltage coil HV on the first limb of11、HV12、HV13And a high-voltage coil HV on the second column21、HV22、HV23All adopt star connection, low voltage coil LV on the first pole11、LV12、LV13The low-voltage coil LV on the second column is connected by adopting a delta connection method21、LV22、LV23All adopt star connection, and this connection structure is called YNdy or Ydy coil connection.
Note that, as shown in fig. 4, the high-voltage coil HV on the first limb of the three-limb double-split transformer bank of the three-phase double-limb double-split transformer group11、HV12、HV13And a high-voltage coil HV on the second column21、HV22、HV23All adopt star connection, low voltage coil LV on the first pole11、LV12、LV13The low-voltage coil LV on the second column is connected by adopting a delta connection method21、LV22、LV23Are connected in a delta connection and the connection structure is called YNdd or Ydd coil connection.
Optionally, the connection group of the three-phase double-column double-split transformer group may be Dy1, Dy5, Dy11, Dyn1yn1, Dyn5yn5 Dyn11yn11, Dd0yn1, Dd0yn5, Dd0yn11, YNd1y0, YNd5y0, YNd11y0, YNd1d1, YNd5d5, YNd11d11, or other connection combinations that achieve the beneficial effects of the three-phase double-column double-split transformer group of the present invention. When the high-voltage coil and the low-voltage coil are connected, the head end and the tail end of the high-voltage coil are correspondingly connected according to the connection group, the head end and the tail end of the low-voltage coil are correspondingly connected according to the connection group, and the neutral point N or N is set or cancelled according to the specific requirements of the application environment.
In the above description, symbols Dy1, Dy5 and the like are connection group symbols. The connection group reference number is a symbol representing the connection method of the transformer coil and the relation between the primary side and the secondary side corresponding to the line potential phase. The connecting group label is composed of letters and numbers, the former letters sequentially represent the connecting method of high-voltage and low-voltage coils from left to right, wherein the capital letters represent the connecting mode of the high-voltage coils, the lowercase letters represent the connecting mode of the low-voltage coils, D and D represent triangular connection, Y and Y represent star connection, two connecting modes of neutral points and neutral points are also adopted during star connection, no symbol is added for representing without neutral points, the letter N is added after the letter Y for representing with neutral points, or the letter N is added after the letter Y for representing, the latter numbers can be integers between 0 and 11 and represent the magnitude of phase shift of the low-voltage coil line potential to the high-voltage coil line potential, and the number multiplied by 30 degrees is the angle number of lagging the low-voltage line potential phase shift of the high-voltage line potential.
Specifically, Dy1 indicates that the high-voltage coil on the first column and the high-voltage coil on the second column in three double-column single-phase transformers of the three-phase double-column double-split transformer bank are connected in a delta manner, the low-voltage coil on the first column and the low-voltage coil on the second column are connected in a star manner, and the phase difference between the high voltage and the low voltage is 30 degrees.
Dy5 shows that high-voltage coils on a first column and high-voltage coils on a second column in three double-column single-phase transformers of the three-phase double-column double-split transformer bank are connected in a triangular mode, low-voltage coils on the first column and low-voltage coils on the second column are connected in a star mode, and the phase difference between high voltage and low voltage is 150 degrees.
Dy11 shows that high-voltage coils on a first column and high-voltage coils on a second column in three double-column single-phase transformers of the three-phase double-column double-split transformer bank are connected in a triangular mode, low-voltage coils on the first column and low-voltage coils on the second column are connected in a star mode, and the phase difference between high voltage and low voltage is 30 degrees.
Dyn1yn1 shows that the high-voltage coil on the first column and the high-voltage coil on the second column in three double-column single-phase transformers of a three-phase double-column double-split transformer group are connected in a triangular mode, the low-voltage coil on the first column is connected in a star mode and is led out through a neutral point, the phase difference of high voltage and low voltage is 30 degrees, the low-voltage coil on the second column is connected in a star mode and is led out through a neutral point, and the phase difference of high voltage and low voltage is 30 degrees.
Dyn5yn5 shows that the high-voltage coil on the first column and the high-voltage coil on the second column in three double-column single-phase transformers of the three-phase double-column double-split transformer bank are connected in a triangular mode, the low-voltage coil on the first column is connected in a star mode and is led out through a neutral point, the phase difference of high voltage and low voltage is 150 degrees, the low-voltage coil on the second column is connected in a star mode and is led out through a neutral point, and the phase difference of high voltage and low voltage is 150 degrees.
Dyn11yn11 shows that the high-voltage coil on the first column and the high-voltage coil on the second column in three double-column single-phase transformers of the three-phase double-column double-split transformer bank are connected in a triangular mode, the low-voltage coil on the first column is connected in a star mode and is led out through a neutral point, the phase difference between high voltage and low voltage is 30 degrees, the low-voltage coil on the second column is connected in a star mode and is led out through a neutral point, and the phase difference between the high voltage and the low voltage is 30 degrees.
Dd0yn1 indicates that the high-voltage coil on the first column and the high-voltage coil on the second column in the three double-column single-phase transformers of the three-phase double-column double-split transformer bank are connected in a delta manner, the low-voltage coil on the first column is connected in a delta manner, the phase difference between the high voltage and the low voltage is 0, the low-voltage coil on the second column is connected in a star manner and is led out by a neutral point, and the phase difference between the high voltage and the low voltage is 30 degrees.
Dd0yn5 indicates that the high-voltage coil on the first column and the high-voltage coil on the second column in the three double-column single-phase transformers of the three-phase double-column double-split transformer bank are connected in a delta manner, the low-voltage coil on the first column is connected in a delta manner, the phase difference between the high voltage and the low voltage is 0, the low-voltage coil on the second column is connected in a star manner and is led out by a neutral point, and the phase difference between the high voltage and the low voltage is 150 degrees.
Dd0yn11 indicates that the high-voltage coil on the first column and the high-voltage coil on the second column in the three double-column single-phase transformers of the three-phase double-column double-split transformer bank are connected in a delta manner, the low-voltage coil on the first column is connected in a delta manner, the phase difference between the high voltage and the low voltage is 0, the low-voltage coil on the second column is connected in a star manner and is led out by a neutral point, and the phase difference between the high voltage and the low voltage is 30 degrees.
YNd1y0 shows that in three double-column single-phase transformers of a three-phase double-column double-split transformer bank, a high-voltage coil on a first column and a high-voltage coil on a second column are connected in a star shape and are led out through neutral points, a low-voltage coil on the first column is connected in a triangle shape, the phase difference of high voltage and low voltage is 30 degrees, a low-voltage coil on the second column is connected in a star shape, and the phase difference of high voltage and low voltage is 0 degree.
YNd5y0 shows that in three double-column single-phase transformers of a three-phase double-column double-split transformer bank, a high-voltage coil on a first column and a high-voltage coil on a second column are connected in a star shape and are led out through neutral points, a low-voltage coil on the first column is connected in a triangle shape, the phase difference of high voltage and low voltage is 150 degrees, a low-voltage coil on the second column is connected in a star shape, and the phase difference of high voltage and low voltage is 0 degree.
YNd11y0 shows that in three double-column single-phase transformers of a three-phase double-column double-split transformer bank, a high-voltage coil on a first column and a high-voltage coil on a second column are connected in a star shape and are led out with neutral points, a low-voltage coil on the first column is connected in a triangle shape, the phase difference of high voltage and low voltage is 30 degrees, a low-voltage coil on the second column is connected in a star shape, and the phase difference of high voltage and low voltage is 0 degree.
YNd1d1 shows that in three double-column single-phase transformers of a three-phase double-column double-split transformer bank, a high-voltage coil on a first column and a high-voltage coil on a second column are connected in a star shape and are led out through neutral points, a low-voltage coil on the first column is connected in a triangle shape, the phase difference of high voltage and low voltage is 30 degrees, a low-voltage coil on the second column is connected in a triangle shape, and the phase difference of high voltage and low voltage is 30 degrees.
YNd5d5 shows that in three double-column single-phase transformers of a three-phase double-column double-split transformer bank, a high-voltage coil on a first column and a high-voltage coil on a second column are connected in a star shape and are led out through neutral points, a low-voltage coil on the first column is connected in a triangle shape, the phase difference of high and low voltages is 150 degrees, a low-voltage coil on the second column is connected in a triangle shape, and the phase difference of high and low voltages is 150 degrees.
YNd11d11 shows that in three double-column single-phase transformers of a three-phase double-column double-split transformer bank, a high-voltage coil on a first column and a high-voltage coil on a second column are connected in a star shape and are led out with neutral points, a low-voltage coil on the first column is connected in a triangle shape, the phase difference of high voltage and low voltage is 30 degrees, a low-voltage coil on the second column is connected in a triangle shape, and the phase difference of high voltage and low voltage is 30 degrees.
Optionally, the three-phase double-column double-split transformer bank is installed inside a tower barrel, inside a nacelle, a nacelle basket or an equipment platform outside the tower of the wind turbine generator system.
It should be noted that the present invention is not limited to the above three mounting positions, and the specific mounting position can be set by itself according to specific situations.
Optionally, the double-column single-phase transformer includes: a dual-column single-phase resin-insulated dry-type transformer, a dual-column single-phase oil-immersed transformer, or a dual-column single-phase gas-insulated transformer.
It should be noted that the present invention is not limited to the three transformers illustrated above, except the transformer illustrated above, all transformers meeting the requirements of the present invention all belong to the protection scope of the present invention.
Optionally, the double-column single-phase transformer further includes: a housing, a cooling system, and a protective device.
It is required to explain, the embodiment of the utility model discloses a transformer bank can be used for fields such as wind power generation, photovoltaic power generation, urban rail transit traction rectification, boats and ships electric propulsion.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (8)
1. A transformer bank, comprising: three double-column single-phase transformers; wherein:
the three double-column single-phase transformers form a three-phase double-column double-split transformer bank;
each double-column single-phase transformer comprises: the coil comprises a first iron core column, a second iron core column, a high-voltage coil and a low-voltage coil, and a high-voltage coil and a low-voltage coil, wherein the first iron core column and the second iron core column are arranged on a rectangular frame iron core;
the high-voltage coils of the first iron core columns of the three double-column single-phase transformers are connected to form a first group of high-voltage terminals of the three-phase double-column double-split transformer bank;
the high-voltage coils of the second iron core columns of the three double-column single-phase transformers are connected with a second group of high-voltage terminals forming the three-phase double-column double-split transformer bank;
the low-voltage coils of the first iron core columns of the three double-column single-phase transformers are connected to form a first group of low-voltage terminals of the three-phase double-column double-split transformer bank;
and the low-voltage coils of the second iron core columns of the three double-column single-phase transformers are connected to form a second group of low-voltage terminals of the three-phase double-column double-split transformer bank.
2. The transformer bank according to claim 1, characterized in that the high-voltage coils on the first core limb in the three double-limb single-phase transformers constituting the three-phase double-limb double-split transformer bank are connected in a delta connection or a star connection to obtain the first group of high-voltage terminals; high-voltage coils on a second iron core column in three double-column single-phase transformers forming the three-phase double-column double-split transformer bank are connected in the same way as the high-voltage coils on the first iron core column, and a second group of high-voltage terminals are obtained;
the high-voltage terminals with the same name in the first group of high-voltage terminals and the second group of high-voltage terminals are connected in parallel to form the high-voltage terminal of the three-phase double-column double-split transformer bank.
3. The transformer bank according to claim 1, characterized in that the low-voltage coils on the first core limb in the three double-limb single-phase transformers constituting the three-phase double-limb double-split transformer bank are connected by delta connection or star connection, resulting in the first group of low-voltage terminals; and low-voltage coils on second iron core columns in three double-column single-phase transformers forming the three-phase double-column double-split transformer bank are connected in a delta connection method or a star connection method to obtain a second group of low-voltage terminals.
4. The transformer bank of claim 3, wherein the first set of low voltage terminals are connected to a first set of electrical devices; the second set of low voltage terminals are connected to a second set of electrical devices.
5. The transformer bank of claim 4, wherein the first set of electrical devices and the second set of electrical devices are operated simultaneously,
or only one set of electrical devices of the first set of electrical devices and the second set of electrical devices may be operated at the same time.
6. The transformer bank of claim 1, wherein the three-phase double-column double-split transformer bank is mounted inside a tower, inside a nacelle, in a nacelle basket, or on an off-tower equipment platform of a wind turbine generator set.
7. The transformer bank of claim 1, wherein the double-limb single-phase transformer comprises: a dual-column single-phase resin-insulated dry-type transformer, a dual-column single-phase oil-immersed transformer, or a dual-column single-phase gas-insulated transformer.
8. The transformer bank of claim 1, wherein the double-limb single-phase transformer further comprises: a housing, a cooling system, and a protective device.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018115745369 | 2018-12-21 | ||
| CN201822159503X | 2018-12-21 | ||
| CN201822159503 | 2018-12-21 | ||
| CN201811574536.9A CN109448975A (en) | 2018-12-21 | 2018-12-21 | Transformer group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210039901U true CN210039901U (en) | 2020-02-07 |
Family
ID=67513150
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920651308.0U Active CN210039901U (en) | 2018-12-21 | 2019-05-08 | Transformer bank |
| CN201910380082.XA Pending CN110111985A (en) | 2018-12-21 | 2019-05-08 | Transformer group |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910380082.XA Pending CN110111985A (en) | 2018-12-21 | 2019-05-08 | Transformer group |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN210039901U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110111985A (en) * | 2018-12-21 | 2019-08-09 | 海南金盘智能科技股份有限公司 | Transformer group |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021077431A1 (en) * | 2019-10-26 | 2021-04-29 | 江苏思源赫兹互感器有限公司 | Boosting transformer |
| CN111308397B (en) * | 2020-02-26 | 2022-03-29 | 广东电网有限责任公司 | Method for verifying connection group state of three-phase transformer |
| CN116798752B (en) * | 2023-07-04 | 2024-06-04 | 山东泰开变压器有限公司 | Vehicle-mounted transformer for testing of convertible coupling group and use method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201504101U (en) * | 2009-08-10 | 2010-06-09 | 李长益 | Integral grounding transformator and arc extinction coil device |
| CN201708031U (en) * | 2010-06-08 | 2011-01-12 | 山东泰开箱变有限公司 | Dry-type transformer specially used for offshore wind power generation |
| CN102064005B (en) * | 2010-10-13 | 2012-03-07 | 山东泰开箱变有限公司 | Maintainable novel dry type transformer special for offshore wind power |
| CN102436920A (en) * | 2011-12-05 | 2012-05-02 | 保定天威集团有限公司 | High-capacity three-body split winding type transformer |
| CN103354156B (en) * | 2013-06-28 | 2015-12-16 | 海鸿电气有限公司 | The pin configuration of the two transformer with split winding of a kind of three dimensional wound core |
| CN204348495U (en) * | 2014-06-24 | 2015-05-20 | 特变电工股份有限公司 | A kind of polysilicon dry-type transformer |
| CN105336477A (en) * | 2015-11-21 | 2016-02-17 | 河南铜牛变压器有限公司 | Immersion type transformer for 12-pulse-wave intermediate frequency furnace |
| CN210039901U (en) * | 2018-12-21 | 2020-02-07 | 海南金盘智能科技股份有限公司 | Transformer bank |
-
2019
- 2019-05-08 CN CN201920651308.0U patent/CN210039901U/en active Active
- 2019-05-08 CN CN201910380082.XA patent/CN110111985A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110111985A (en) * | 2018-12-21 | 2019-08-09 | 海南金盘智能科技股份有限公司 | Transformer group |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110111985A (en) | 2019-08-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210039901U (en) | Transformer bank | |
| Kumar et al. | A multipurpose and power quality improved electric vessels charging station for the seaports | |
| US10608523B2 (en) | 12-phase transformer rectifier | |
| Stieneker et al. | Medium-voltage DC research grid Aachen | |
| Junyent-Ferré et al. | Operation of HVDC modular multilevel converters under DC pole imbalances | |
| WO2016170869A1 (en) | Power conversion device | |
| CN110544580A (en) | Main transformer and boosting system of offshore wind power plant boosting station | |
| CN109448975A (en) | Transformer group | |
| CN203351361U (en) | Dual-split epoxy resin insulation dry-type boosting transformer used for wind power and photovoltaic power generation | |
| Palanisamy et al. | Basic Electrical and Instrumentation Engineering | |
| Adam et al. | Multi‐pole voltage source converter HVDC transmission systems | |
| Pirhadi et al. | Design of an unsaturated core-based fault current limiter to tackle unsymmetrical faults | |
| CN216773015U (en) | Three-phase dry type transformer bank | |
| CN212113430U (en) | Multi-split transformer for in-phase power supply | |
| Xiong et al. | The application of HVDC transmission in shore power supply | |
| CN218333400U (en) | Transformer applicable to flexible traction substation and utilizing leakage inductance | |
| CN114175484A (en) | AC to ACMMC with reduced number of converter arms | |
| CN221709441U (en) | Access protection device and power generation system | |
| CN217333801U (en) | Phase-shift-based transformer applicable to flexible traction substation | |
| CN212210510U (en) | Flexible direct current system's earthing device and flexible direct current system | |
| Wang et al. | A hybrid redundancy scheme for medium‐voltage three‐phase cascaded H‐bridge electronic power transformer | |
| CN208589345U (en) | A kind of phase-shifting transformer grid-connected for nine phase motors | |
| Meng et al. | Effect of Winding Configuration on the kVA Rating of Wye-connected Autotransformer Applied to 12-pulse Rectifier | |
| Tatyana et al. | The innovative EHV line and its main indicators | |
| CN102938303B (en) | Three-phase reactor applied to three-phase four-wire system grid-connected converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |