CN116798752B - Vehicle-mounted transformer for testing of convertible coupling group and use method - Google Patents

Vehicle-mounted transformer for testing of convertible coupling group and use method Download PDF

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CN116798752B
CN116798752B CN202310813595.1A CN202310813595A CN116798752B CN 116798752 B CN116798752 B CN 116798752B CN 202310813595 A CN202310813595 A CN 202310813595A CN 116798752 B CN116798752 B CN 116798752B
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voltage
sleeve
low
medium
head
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CN116798752A (en
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姚田彪
王晶
孙广迎
张帅
申慧英
宋超
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SHANDONG TAIKAI TRANSFORMER CO Ltd
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SHANDONG TAIKAI TRANSFORMER CO Ltd
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Abstract

The application discloses a vehicle-mounted transformer for testing a convertible coupling group and a use method thereof, belonging to the technical field of transformer manufacture, and comprising a transformer oil tank shell, wherein an iron core, a high-voltage winding, a medium-voltage winding and a low-voltage winding which are wound on the iron core are arranged in the transformer oil tank shell; the upper surface of the transformer oil tank shell is provided with a high-voltage head sleeve, a high-voltage tail sleeve, a medium-voltage head sleeve, a medium-voltage tail sleeve, a low-voltage head sleeve, a low-voltage tail sleeve and a plurality of leads; the input end of the high-voltage winding is led out of the transformer oil tank shell through a lead and is connected with the high-voltage head sleeve, and the output end of the high-voltage winding is led out of the transformer oil tank shell through a lead and is connected with the high-voltage tail sleeve. Through the arrangement of the favorable outlet sleeve, the assembly, the replacement and the connection of different Y joints or D joints of the external winding of the oil tank, the conversion of three-phase power supply and single-phase power supply, and the conversion output of different voltage and current under corresponding different connection can be realized, and the transportation requirements of indoor tests and vehicle-mounted outdoor tests are met.

Description

Vehicle-mounted transformer for testing of convertible coupling group and use method
Technical Field
The invention relates to the technical field of transformer manufacturing, in particular to a vehicle-mounted transformer for testing a convertible coupling group and a using method thereof.
Background
The transformer is a device for changing ac voltage by utilizing the principle of electromagnetic induction, and has the main functions of voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization and the like, and can be divided into a power transformer, an instrument transformer, a test transformer and a special transformer according to the application. The power transformer is used for increasing and decreasing voltage of the power transmission and distribution system; the transformer for the instrument is used for measuring the instrument and the relay protection device; the test transformer can generate high voltage and is used for performing high voltage test on the electrical equipment; special transformers such as rectifier transformers, regulating transformers, etc.
A power transformer is one of the most important devices in a power system, and functions to convert electric energy from one voltage level to another voltage level, thereby meeting the needs of different voltage levels in the power system. The power transformers can be classified into various types according to different classification methods, and in order to be suitable for different environments and requirements, the power transformers can be classified into vehicle-mounted transformers, wetland transformers and explosion-proof transformers according to use environments, wherein the vehicle-mounted transformers are mainly used for train equipment and drivers of a railway power transmission system, and the equipment needs corresponding transformers for converting electric energy from a power supply system into electric energy suitable for use on a train.
The test transformer is a special transformer applied to different test equipment and test items in a product laboratory for supplying power, different purposes have various requirements on output voltage, connection groups and the like of the test transformer, the output of the existing test transformer is single, the connection groups cannot be replaced, the voltage output is fixed, and the requirements of the existing various equipment and test items cannot be met.
Disclosure of Invention
In order to solve the technical problems, in a first aspect, the invention provides a vehicle-mounted transformer for testing a convertible coupling group, which comprises a transformer oil tank shell, wherein an iron core, a high-voltage winding, a medium-voltage winding and a low-voltage winding which are wound on the iron core are arranged in the transformer oil tank shell;
The upper surface of the transformer oil tank shell is provided with a high-voltage head sleeve, a high-voltage tail sleeve, a medium-voltage head sleeve, a medium-voltage tail sleeve, a low-voltage head sleeve, a low-voltage tail sleeve and a plurality of leads;
The input end of the high-voltage winding is led out of the transformer oil tank shell through a lead and is connected with the high-voltage head sleeve, and the output end of the high-voltage winding is led out of the transformer oil tank shell through a lead and is connected with the high-voltage tail sleeve;
the input end of the medium-voltage winding is led out of the transformer oil tank shell through a lead and is connected with the medium-voltage head sleeve, and the output end of the medium-voltage winding is led out of the transformer oil tank shell through a lead and is connected with the medium-voltage tail sleeve;
The input end of the low-voltage winding is led out of the transformer oil tank shell through a lead and is connected with the low-voltage head sleeve, and the output end of the low-voltage winding is led out of the transformer oil tank shell through a lead and is connected with the low-voltage tail sleeve.
Further, the top of the transformer oil tank shell is stepped and comprises at least two height surfaces, and the height difference of each height surface is larger than a set threshold value.
Further, the high-voltage head sleeve and the high-voltage tail sleeve are arranged on the highest height surface;
The medium-voltage head sleeve, the medium-voltage tail sleeve, the low-voltage head sleeve and the low-voltage tail sleeve are arranged on the height surfaces different from the high-voltage head sleeve and the high-voltage tail sleeve.
Further, the medium voltage head sleeve and the medium voltage end sleeve are arranged on different height surfaces from the low voltage head sleeve and the low voltage end sleeve.
Further, the high voltage head sleeve, the high voltage end sleeve, the medium voltage head sleeve, the medium voltage end sleeve, the low voltage head sleeve and the low voltage end sleeve are all led to the same side when the equipment is connected.
Further, the connection modes of the high-voltage head sleeve, the high-voltage tail sleeve, the medium-voltage head sleeve, the medium-voltage tail sleeve, the low-voltage head sleeve and the low-voltage tail sleeve comprise 8 types, and the connection modes of the high-voltage head sleeve, the high-voltage tail sleeve, the medium-voltage head sleeve, the medium-voltage tail sleeve, the low-voltage head sleeve and the low-voltage tail sleeve comprise 8 types respectively:
The high-voltage winding, the medium-voltage winding and the low-voltage winding are all star-shaped, the neutral point is grounded, the phase difference between the high-voltage side and the low-voltage side is 0, and the phase difference is YNyn < 0 > yn < 0 >;
The high-voltage winding and the low-voltage winding are connected in a star shape, the neutral point is grounded, the low-voltage winding is connected in a triangle shape, and the line voltage at the high-voltage side is 30 degrees ahead of the line voltage at the low-voltage side and is recorded as YNyn d11;
The high-voltage winding is connected in star mode, the neutral point is grounded, the medium-voltage winding and the low-voltage winding are connected in triangle mode, and the line voltage at the high-voltage side is 30 degrees ahead of the line voltage at the low-voltage side and is recorded as YNd11d11;
The high-voltage winding and the low-voltage winding are both star-shaped, the neutral point is grounded, the medium-voltage winding is in triangular connection, and the line voltage at the high-voltage side is 30 degrees ahead of the line voltage at the low-voltage side and is recorded as YNd11yn0;
The high-voltage winding, the medium-voltage winding and the low-voltage winding are connected in a triangle, the phase difference between the high-voltage side and the low-voltage side is 0, and the phase difference is marked as Dd0d0;
The high-voltage winding is in delta connection, the medium-voltage winding and the low-voltage winding are both in star connection, a neutral point is grounded, and the line voltage at the low-voltage side leads the line voltage at the high-voltage side by 30 degrees and is marked as Dyn1yn1;
The high-voltage winding and the medium-voltage winding are connected in a triangular mode, the low-voltage winding is connected in a star mode, and the line voltage at the low-voltage side leads the line voltage at the high-voltage side by 30 degrees and is recorded as Dd0yn1;
The high-voltage winding and the low-voltage winding are connected in a triangular mode, the medium-voltage winding is connected in a star mode, a neutral point is grounded, and the phase difference between the high-voltage side and the low-voltage side is 0 and is marked as Dyn1d0.
Further, the high-voltage head sleeve comprises a high-voltage head side A phase sleeve, a high-voltage head side B phase sleeve and a high-voltage head side C phase sleeve, and the high-voltage tail sleeve comprises a high-voltage tail side X phase sleeve, a high-voltage tail side Y phase sleeve and a high-voltage tail side Z phase sleeve;
The high-voltage first side A phase sleeve is arranged close to the high-voltage last side Y phase sleeve;
the high-voltage first side B-phase sleeve is arranged close to the high-voltage last side Z-phase sleeve;
the high-voltage head side C-phase sleeve is arranged close to the high-voltage tail side X-phase sleeve;
And the high-voltage head side A phase sleeve, the high-voltage tail side Y phase sleeve, the high-voltage head side B phase sleeve, the high-voltage tail side Z phase sleeve, the high-voltage head side C phase sleeve and the high-voltage tail side X phase sleeve are sequentially arranged in a W shape.
Further, the transformer further comprises a current transformer, and the current transformer is arranged on one side wall of the transformer oil tank shell;
the low-voltage head sleeve and the low-voltage tail sleeve are connected with external equipment, and a primary winding of the current transformer is connected in series in a power supply loop of the low-voltage winding.
In a second aspect, the present invention provides a method for using a testing transformer based on the above-mentioned first aspect, including the steps of:
Acquiring a needed transformer connection mode;
When the connection mode of the transformer for the test is YNyn <0 > yn <0 >, X, Y, Z of the high-voltage end sleeve is connected, xm, ym and Zm of the medium-voltage end sleeve are connected, and x, y and z of the low-voltage end sleeve are connected;
When the connection mode of the transformer for the test is YNyn d11, X, Y, Z of the high-voltage end sleeve is connected, xm, ym and Zm of the medium-voltage end sleeve are connected, a of the low-voltage head sleeve is connected with y of the low-voltage end sleeve, b of the low-voltage head sleeve is connected with z of the low-voltage end sleeve, and c of the low-voltage head sleeve is connected with x of the low-voltage end sleeve;
When the connection mode of the transformer for the test is YNd11d11, X, Y, Z of the high-voltage end sleeve is connected, am of the medium-voltage end sleeve is connected with Ym of the medium-voltage end sleeve, bm of the medium-voltage end sleeve is connected with Zm of the medium-voltage end sleeve, cm of the medium-voltage end sleeve is connected with Xm of the medium-voltage end sleeve, a of the low-voltage end sleeve is connected with y of the low-voltage end sleeve, b of the low-voltage end sleeve is connected with z of the low-voltage end sleeve, and c of the low-voltage end sleeve is connected with x of the low-voltage end sleeve;
When the connection mode of the transformer for the test is YNd11yn0, X, Y, Z of the high-voltage end sleeve is connected, am of the medium-voltage end sleeve is connected with Ym of the medium-voltage end sleeve, bm of the medium-voltage end sleeve is connected with Zm of the medium-voltage end sleeve, cm of the medium-voltage end sleeve is connected with Xm of the medium-voltage end sleeve, and x, y and z of the low-voltage end sleeve are connected;
When the connection mode of the transformer for the test is Dd0d0, the A of the high-voltage head sleeve is connected with the Y of the high-voltage end sleeve, the B of the high-voltage head sleeve is connected with the Z of the high-voltage end sleeve, the C of the high-voltage head sleeve is connected with the X of the high-voltage end sleeve, the Am of the medium-voltage head sleeve is connected with the Ym of the medium-voltage end sleeve, the Bm of the medium-voltage head sleeve is connected with the Zm of the medium-voltage end sleeve, the Cm of the medium-voltage head sleeve is connected with the Xm of the medium-voltage end sleeve, the a of the low-voltage head sleeve is connected with the Y of the low-voltage end sleeve, the B of the low-voltage head sleeve is connected with the Z of the low-voltage end sleeve, and the C of the low-voltage head sleeve is connected with the X of the low-voltage end sleeve;
When the connection mode of the transformer for the test is Dyn1yn1, the A of the high-voltage head sleeve is connected with the Y of the high-voltage end sleeve, the B of the high-voltage head sleeve is connected with the Z of the high-voltage end sleeve, the C of the high-voltage head sleeve is connected with the X of the high-voltage end sleeve, the Xm, the Ym and the Zm of the medium-voltage end sleeve are connected, and the X, the Y and the Z of the low-voltage end sleeve are connected;
When the connection mode of the transformer for the test is Dd0yn1, the A of the high-voltage head sleeve is connected with the Y of the high-voltage end sleeve, the B of the high-voltage head sleeve is connected with the Z of the high-voltage end sleeve, the C of the high-voltage head sleeve is connected with the X of the high-voltage end sleeve, the Am of the medium-voltage head sleeve is connected with the Ym of the medium-voltage end sleeve, the Bm of the medium-voltage head sleeve is connected with the Zm of the medium-voltage end sleeve, the Cm of the medium-voltage head sleeve is connected with the Xm of the medium-voltage end sleeve, and the X, the Y and the Z of the low-voltage end sleeve are connected;
When the connection mode of the transformer for the test is Dyn1d0, the A of the high-voltage head sleeve is connected with the Y of the high-voltage end sleeve, the B of the high-voltage head sleeve is connected with the Z of the high-voltage end sleeve, the C of the high-voltage head sleeve is connected with the X of the high-voltage end sleeve, the Xm, the Ym and the Zm of the medium-voltage end sleeve are connected, the a of the low-voltage head sleeve is connected with the Y of the low-voltage end sleeve, the B of the low-voltage head sleeve is connected with the Z of the low-voltage end sleeve, and the C of the low-voltage head sleeve is connected with the X of the low-voltage end sleeve.
The application has the beneficial effects that: the transformer for the test can realize different power supply requirements and conversion, and can be matched with various test equipment and various voltage class products with rated voltages of 6kV, 10kV and 35kV for measuring no-load, induction and partial discharge of low-voltage windings, and meet the transportation requirements of indoor tests and vehicle-mounted outdoor tests.
These and other objects, features and advantages of the present invention will become more fully apparent from the following detailed description.
Drawings
Fig. 1 shows a schematic diagram of the front view structure of the present application.
Fig. 2 shows a schematic top view of the present application.
Fig. 3 shows a right-view structural schematic of the present application.
Fig. 4 shows a schematic circuit diagram of the winding of the present application.
Fig. 5 shows YNyn-0 yn0 circuit connection diagram and phasor diagram of the present application.
Fig. 6 shows YNyn d11 circuit connection diagrams and phasor diagrams of the present application.
FIG. 7 shows YNd11d11 circuit connection diagram and phasor diagram of the present application.
Fig. 8 shows the YNd11yn0 circuit connection diagram and phasor diagram of the present application.
Fig. 9 shows the Dd0d0 circuit connection diagram and the phasor diagram of the present application.
Fig. 10 shows Dyn1yn1 circuit connection diagram and phasor diagram of the present application.
Fig. 11 shows the Dd0yn1 circuit connection diagram and the phasor diagram of the present application.
Fig. 12 shows Dyn1d0 circuit connection diagram and phasor diagram of the present application.
Reference numerals: 1-iron core, 2-high voltage winding, 3-medium voltage winding, 4-low voltage winding, 5-lead wire, 6-transformer oil tank shell, 7-high voltage first sleeve, 8-high voltage last sleeve, 9-medium voltage first sleeve, 10-medium voltage last sleeve, 11-low voltage first sleeve, 12-low voltage last sleeve and 13-sleeve type current transformer.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to make and use the invention. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
It will be appreciated by those skilled in the art that in the disclosure of the present specification, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, the above terms should not be construed as limiting the present invention.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
Referring to fig. 1 to 12, a vehicle-mounted transformer for testing of a switchable coupling group according to a preferred embodiment of the present invention will be described in detail below, including a transformer tank case 6, in which a core 1 and high, medium and low voltage windings 2,3 and 4 wound on the core 1 are disposed in the transformer tank case 6;
The upper surface of the transformer oil tank shell 6 is provided with a high-voltage head sleeve 7, a high-voltage tail sleeve 8, a medium-voltage head sleeve 9, a medium-voltage tail sleeve 10, a low-voltage head sleeve 11, a low-voltage tail sleeve 12 and a plurality of leads 5;
The input end of the high-voltage winding 2 is led out of the transformer oil tank shell 6 through a lead 5 and is connected with a high-voltage head sleeve 7, and the output end of the high-voltage winding 2 is led out of the transformer oil tank shell 6 through a lead 5 and is connected with a high-voltage tail sleeve 8;
The input end of the medium-voltage winding 3 is led out of the transformer oil tank shell 6 through a lead 5 and is connected with a medium-voltage head sleeve 9, and the output end of the medium-voltage winding 3 is led out of the transformer oil tank shell 6 through a lead 5 and is connected with a medium-voltage end sleeve 10;
the input end of the low-voltage winding 4 is led out of the transformer tank housing 6 through a lead 5 and is connected with a low-voltage head sleeve 11, and the output end of the low-voltage winding 4 is led out of the transformer tank housing 6 through a lead 5 and is connected with a low-voltage end sleeve 12.
The high-voltage winding 2, the medium-voltage winding 3 and the low-voltage winding 4 are wound on the iron core 1, and led out of the transformer oil tank shell 6 through the lead 5, the high-voltage head sleeve 7, the high-voltage tail sleeve 8, the medium-voltage head sleeve 9, the medium-voltage tail sleeve 10, the low-voltage head sleeve 11 and the low-voltage tail sleeve 12, the assembly and replacement connection of different Y joints or D joints of the external winding of the oil tank can be realized through the arrangement of the favorable outlet sleeve, the conversion of three-phase power supply and single-phase power supply and the conversion output of different voltage and current under corresponding different connection are matched with various test equipment and the measurement and the use of the no-load, induction and partial discharge of various voltage class products with rated voltages of 6kV, 10kV and 35kV, and the transportation requirements of indoor tests and vehicle-mounted outdoor tests are met.
According to one embodiment of the invention, the top of the transformer tank shell 6 is stepped and comprises at least two height surfaces, and the height difference of each height surface is larger than a set threshold value, so that the safety distances of the high-voltage head sleeve 7, the high-voltage tail sleeve 8, the medium-voltage head sleeve 9, the medium-voltage tail sleeve 10, the low-voltage head sleeve 11 and the low-voltage tail sleeve 12 in the height space are ensured.
According to an embodiment of the invention, the high-voltage head sleeve 7 and the high-voltage tail sleeve 8 are arranged at the highest height surface;
The medium-voltage head sleeve 9, the medium-voltage end sleeve 10, the low-voltage head sleeve 11 and the low-voltage end sleeve 12 are arranged at different height surfaces from the high-voltage head sleeve 7 and the high-voltage end sleeve 8.
According to an embodiment of the invention, the medium voltage head sleeve 9 and the medium voltage end sleeve 10 are arranged at a different level than the low voltage head sleeve 11 and the low voltage end sleeve 12.
According to an embodiment of the invention, the leads of the high-voltage head sleeve 7, the high-voltage tail sleeve 8, the medium-voltage head sleeve 9, the medium-voltage tail sleeve 10, the low-voltage head sleeve 11 and the low-voltage tail sleeve 12 are all led to the same side when the equipment is connected, so that the vehicle-mounted wiring is convenient, and the transportation space is saved.
Referring to fig. 5 to 12, according to an embodiment of the present invention, the connection modes of the high voltage head bushing 7, the high voltage end bushing 8, the medium voltage head bushing 9, the medium voltage end bushing 10, the low voltage head bushing 11 and the low voltage end bushing 12 include 8 kinds, and the connection modes of the high voltage head bushing 7, the high voltage end bushing 8, the medium voltage head bushing 9, the medium voltage end bushing 10, the low voltage head bushing 11 and the low voltage end bushing 12 include 8 kinds, respectively:
The high-voltage winding, the medium-voltage winding and the low-voltage winding are all star-shaped, the neutral point is grounded, the phase difference between the high-voltage side and the low-voltage side is 0, and the phase difference is YNyn < 0 > yn < 0 >;
The high-voltage winding and the low-voltage winding are connected in a star shape, the neutral point is grounded, the low-voltage winding is connected in a triangle shape, and the line voltage at the high-voltage side is 30 degrees ahead of the line voltage at the low-voltage side and is recorded as YNyn d11;
The high-voltage winding is connected in star mode, the neutral point is grounded, the medium-voltage winding and the low-voltage winding are connected in triangle mode, and the line voltage at the high-voltage side is 30 degrees ahead of the line voltage at the low-voltage side and is recorded as YNd11d11;
The high-voltage winding and the low-voltage winding are both star-shaped, the neutral point is grounded, the medium-voltage winding is in triangular connection, and the line voltage at the high-voltage side is 30 degrees ahead of the line voltage at the low-voltage side and is recorded as YNd11yn0;
The high-voltage winding, the medium-voltage winding and the low-voltage winding are connected in a triangle, the phase difference between the high-voltage side and the low-voltage side is 0, and the phase difference is marked as Dd0d0;
The high-voltage winding is in delta connection, the medium-voltage winding and the low-voltage winding are both in star connection, a neutral point is grounded, and the line voltage at the low-voltage side leads the line voltage at the high-voltage side by 30 degrees and is marked as Dyn1yn1;
The high-voltage winding and the medium-voltage winding are connected in a triangular mode, the low-voltage winding is connected in a star mode, and the line voltage at the low-voltage side leads the line voltage at the high-voltage side by 30 degrees and is recorded as Dd0yn1;
The high-voltage winding and the low-voltage winding are connected in a triangular mode, the medium-voltage winding is connected in a star mode, a neutral point is grounded, and the phase difference between the high-voltage side and the low-voltage side is 0 and is marked as Dyn1d0.
Referring to fig. 2, according to an embodiment of the present invention, the high voltage head bushing 7 includes a high voltage head side a phase bushing, a high voltage head side B phase bushing, and a high voltage head side C phase bushing, and the high voltage end bushing 8 includes a high voltage end side X phase bushing, a high voltage end side Y phase bushing, and a high voltage end side Z phase bushing;
The high-voltage first side A phase sleeve is arranged close to the high-voltage last side Y phase sleeve;
the high-voltage first side B-phase sleeve is arranged close to the high-voltage last side Z-phase sleeve;
the high-voltage head side C-phase sleeve is arranged close to the high-voltage tail side X-phase sleeve;
And the high-voltage head side A phase sleeve, the high-voltage tail side Y phase sleeve, the high-voltage head side B phase sleeve, the high-voltage tail side Z phase sleeve, the high-voltage head side C phase sleeve and the high-voltage tail side X phase sleeve are sequentially arranged in a W shape.
And when Y is connected, the high-voltage winding 2, the medium-voltage winding 3 and the low-voltage winding 4 respectively correspond to rated voltages of 40kV, 12kV and 3.3kV.
The high-voltage head sleeve 7 comprises a high-voltage head side A-phase sleeve, a high-voltage head side B-phase sleeve and a high-voltage head side C-phase sleeve, and the high-voltage tail sleeve 8 comprises a high-voltage tail side X-phase sleeve, a high-voltage tail side Y-phase sleeve and a high-voltage tail side Z-phase sleeve;
The medium voltage head bushing 9 comprises a medium voltage head side Am phase bushing, a medium voltage head side Bm phase bushing and a medium voltage head side Cm phase bushing, and the medium voltage end bushing 10 comprises a medium voltage end side Xm phase bushing, a medium voltage end side Ym phase bushing and a medium voltage end side Zm phase bushing;
the low voltage head sleeve 11 comprises a low voltage head side a phase sleeve, a low voltage head side b phase sleeve and a low voltage head side c phase sleeve, and the low voltage end sleeve 12 comprises a low voltage end side x phase sleeve, a low voltage end side y phase sleeve and a low voltage end side z phase sleeve.
The high-voltage head side A phase sleeve is arranged close to the high-voltage tail side Y phase sleeve, the high-voltage head side B phase sleeve is arranged close to the high-voltage tail side Z phase sleeve, and the high-voltage head side C phase sleeve is arranged close to the high-voltage tail side X phase sleeve;
the middle-voltage head side Am phase sleeve is arranged close to the middle-voltage tail side Ym phase sleeve, the middle-voltage head side Bm phase sleeve is arranged close to the middle-voltage tail side Zm phase sleeve, and the middle-voltage head side Cm phase sleeve is arranged close to the middle-voltage tail side Xm phase sleeve;
The low-voltage head side a phase sleeve is arranged close to the low-voltage tail side y phase sleeve, the low-voltage head side b phase sleeve is arranged close to the low-voltage tail side z phase sleeve, and the low-voltage head side c phase sleeve is arranged close to the low-voltage tail side x phase sleeve; the device can realize the assembly and replacement connection of different Y joints or D joints of the external winding of the oil tank, the connection groups can be 8 combinations, YNyn0yn0, YNyn0D11, YNd11yn0, dd0D0, dyn1yn1, dy 0yn1 and Dyn1D0, the three-phase power supply single-phase power supply conversion, and the conversion output of different voltage and current under corresponding different connection groups.
According to an embodiment of the invention, the transformer further comprises a current transformer 13, wherein the current transformer 13 is arranged on one side wall of the transformer oil tank shell 6;
The low-voltage head sleeve 11 and the low-voltage tail sleeve 12 are connected with external equipment, the primary winding of the current transformer 13 is connected in series in the power supply loop of the low-voltage winding 4, and the current transformer 13 can realize real-time detection of low-voltage output current in test.
According to an embodiment of the invention, a method for using a vehicle-mounted transformer for testing a switchable coupling group includes the steps of:
Acquiring a needed transformer connection mode;
When the connection mode of the transformer for the test is YNyn <0 > yn <0 >, X, Y, Z of the high-voltage end sleeve 8 is connected, xm, ym and Zm of the medium-voltage end sleeve 10 are connected, and x, y and z of the low-voltage end sleeve 12 are connected;
When the connection mode of the transformer for test is YNyn d11, X, Y, Z of the high-voltage end sleeve 8 is connected, xm, ym and Zm of the medium-voltage end sleeve 10 are connected, a of the low-voltage end sleeve 11 is connected with y of the low-voltage end sleeve 12, b of the low-voltage end sleeve 11 is connected with z of the low-voltage end sleeve 12, and c of the low-voltage end sleeve 11 is connected with x of the low-voltage end sleeve 12;
When the connection mode of the transformer for the test is YNd11d11, X, Y, Z of the high-voltage end sleeve 8 is connected, am of the medium-voltage end sleeve 9 is connected with Ym of the medium-voltage end sleeve 10, bm of the medium-voltage end sleeve 9 is connected with Zm of the medium-voltage end sleeve 10, cm of the medium-voltage end sleeve 9 is connected with Xm of the medium-voltage end sleeve 10, a of the low-voltage end sleeve 11 is connected with y of the low-voltage end sleeve 12, b of the low-voltage end sleeve 11 is connected with z of the low-voltage end sleeve 12, and c of the low-voltage end sleeve 11 is connected with x of the low-voltage end sleeve 12;
When the connection mode of the transformer for the test is YNd11yn0, X, Y, Z of the high-voltage end sleeve 8 is connected, am of the medium-voltage end sleeve 9 is connected with Ym of the medium-voltage end sleeve 10, bm of the medium-voltage end sleeve 9 is connected with Zm of the medium-voltage end sleeve 10, cm of the medium-voltage end sleeve 9 is connected with Xm of the medium-voltage end sleeve 10, and x, y and z of the low-voltage end sleeve 12 are connected;
When the connection mode of the transformer for the test is Dd0d0, A of the high-voltage head sleeve 7 is connected with Y of the high-voltage end sleeve 8, B of the high-voltage head sleeve 7 is connected with Z of the high-voltage end sleeve 8, C of the high-voltage head sleeve 7 is connected with X of the high-voltage end sleeve 8, am of the medium-voltage head sleeve 9 is connected with Ym of the medium-voltage end sleeve 10, bm of the medium-voltage head sleeve 9 is connected with Zm of the medium-voltage end sleeve 10, cm of the medium-voltage head sleeve 9 is connected with Xm of the medium-voltage end sleeve 10, a of the low-voltage head sleeve 11 is connected with Y of the low-voltage end sleeve 12, B of the low-voltage head sleeve 11 is connected with Z of the low-voltage end sleeve 12, and C of the low-voltage head sleeve 11 is connected with X of the low-voltage end sleeve 12;
When the connection mode of the transformer for the test is Dyn1yn1, the A of the high-voltage head sleeve 7 is connected with the Y of the high-voltage end sleeve 8, the B of the high-voltage head sleeve 7 is connected with the Z of the high-voltage end sleeve 8, the C of the high-voltage head sleeve 7 is connected with the X of the high-voltage end sleeve 8, the Xm, ym and Zm of the medium-voltage end sleeve 10 are connected, and the X, Y and Z of the low-voltage end sleeve 12 are connected;
When the connection mode of the transformer for the test is Dd0yn1, the A of the high-voltage head sleeve 7 is connected with the Y of the high-voltage end sleeve 8, the B of the high-voltage head sleeve 7 is connected with the Z of the high-voltage end sleeve 8, the C of the high-voltage head sleeve 7 is connected with the X of the high-voltage end sleeve 8, the Am of the medium-voltage head sleeve 9 is connected with the Ym of the medium-voltage end sleeve 10, the Bm of the medium-voltage head sleeve 9 is connected with the Zm of the medium-voltage end sleeve 10, the Cm of the medium-voltage head sleeve 9 is connected with the Xm of the medium-voltage end sleeve 10, and the X, Y and Z of the low-voltage end sleeve 12 are connected;
When the connection mode of the transformer for the test is Dyn1d0, the A of the high-voltage head sleeve 7 is connected with the Y of the high-voltage end sleeve 8, the B of the high-voltage head sleeve 7 is connected with the Z of the high-voltage end sleeve 8, the C of the high-voltage head sleeve 7 is connected with the X of the high-voltage end sleeve 8, the Xm, the Ym and the Zm of the medium-voltage end sleeve 10 are connected, the a of the low-voltage head sleeve 11 is connected with the Y of the low-voltage end sleeve 12, the B of the low-voltage head sleeve 11 is connected with the Z of the low-voltage end sleeve 12, and the C of the low-voltage head sleeve 11 is connected with the X of the low-voltage end sleeve 12.

Claims (4)

1. The vehicle-mounted transformer for the test of the convertible connection group comprises a transformer oil tank shell (6), and is characterized in that an iron core (1), a high-voltage winding (2), a medium-voltage winding (3) and a low-voltage winding (4) which are wound on the iron core (1) are arranged in the transformer oil tank shell (6);
The upper surface of the transformer oil tank shell (6) is provided with a high-voltage head sleeve (7), a high-voltage tail sleeve (8), a medium-voltage head sleeve (9), a medium-voltage tail sleeve (10), a low-voltage head sleeve (11), a low-voltage tail sleeve (12) and a plurality of leads (5);
The input end of the high-voltage winding (2) is led out of a transformer oil tank shell (6) through a lead (5) and is connected with a high-voltage head sleeve (7), and the output end of the high-voltage winding (2) is led out of the transformer oil tank shell (6) through the lead (5) and is connected with a high-voltage end sleeve (8);
The input end of the medium-voltage winding (3) is led out of a transformer oil tank shell (6) through a lead (5) and is connected with a medium-voltage head sleeve (9), and the output end of the medium-voltage winding (3) is led out of the transformer oil tank shell (6) through the lead (5) and is connected with a medium-voltage end sleeve (10);
the input end of the low-voltage winding (4) is led out of the transformer oil tank shell (6) through a lead (5) and is connected with a low-voltage head sleeve (11), and the output end of the low-voltage winding (4) is led out of the transformer oil tank shell (6) through the lead (5) and is connected with a low-voltage tail sleeve (12);
The high-voltage head sleeve (7) and the high-voltage tail sleeve (8) are arranged on the highest height surface;
the middle-pressure head sleeve (9), the middle-pressure tail sleeve (10), the low-pressure head sleeve (11) and the low-pressure tail sleeve (12) are arranged on the height surfaces different from the high-pressure head sleeve (7) and the high-pressure tail sleeve (8);
the middle-pressure head sleeve (9) and the middle-pressure tail sleeve (10) are arranged on the height surfaces different from the low-pressure head sleeve (11) and the low-pressure tail sleeve (12);
The high-voltage head sleeve (7), the high-voltage end sleeve (8), the medium-voltage head sleeve (9), the medium-voltage end sleeve (10), the low-voltage head sleeve (11) and the low-voltage end sleeve (12) are all led to the same side when the equipment is connected;
The connection modes of the high-voltage head sleeve (7), the high-voltage end sleeve (8), the medium-voltage head sleeve (9), the medium-voltage end sleeve (10), the low-voltage head sleeve (11) and the low-voltage end sleeve (12) comprise 8 types, namely:
the high-voltage winding (2), the medium-voltage winding (3) and the low-voltage winding (4) are all star-shaped, the neutral point is grounded, the phase difference between the high-voltage side and the low-voltage side is 0, and the phase difference is YNyn <0 >;
The high-voltage winding (2) and the low-voltage winding (4) are connected in a star shape, the neutral point is grounded, the low-voltage winding (2) is connected in a triangle shape, and the line voltage at the high-voltage side is 30 degrees ahead of the line voltage at the low-voltage side and is recorded as YNyn d11;
The high-voltage winding (2) is connected in a star shape, the neutral point is grounded, the medium-voltage winding (3) and the low-voltage winding (4) are connected in a triangle shape, and the line voltage at the high-voltage side is 30 degrees ahead of the line voltage at the low-voltage side and is recorded as YNd11d11;
The high-voltage winding (2) and the low-voltage winding (4) are connected in a star shape, the neutral point is grounded, the medium-voltage winding (3) is connected in a triangle shape, and the line voltage at the high-voltage side is 30 degrees ahead of the line voltage at the low-voltage side and is recorded as YNd11yn0;
The high-voltage winding (2), the medium-voltage winding (3) and the low-voltage winding (4) are connected in a triangle, the phase difference between the high-voltage side and the low-voltage side is 0, and the phase difference is recorded as Dd0d0;
The high-voltage winding (2) is in triangular connection, the medium-voltage winding (3) and the low-voltage winding (4) are both in star connection, a neutral point is grounded, and the line voltage at the low-voltage side leads the line voltage at the high-voltage side by 30 degrees and is marked as Dyn1yn1;
the high-voltage winding (2) and the medium-voltage winding (3) are connected in a triangular mode, the low-voltage winding (4) is connected in a star mode, and the line voltage at the low-voltage side leads the line voltage at the high-voltage side by 30 degrees and is marked as Dd0yn1;
the high-voltage winding (2) and the low-voltage winding (4) are connected in a triangular mode, the medium-voltage winding (3) is connected in a star mode, a neutral point is grounded, the phase difference between the high-voltage side and the low-voltage side is 0, and the phase difference is marked as Dyn1d0;
The high-voltage head sleeve (7) comprises a high-voltage head side A-phase sleeve, a high-voltage head side B-phase sleeve and a high-voltage head side C-phase sleeve, and the high-voltage tail sleeve (8) comprises a high-voltage tail side X-phase sleeve, a high-voltage tail side Y-phase sleeve and a high-voltage tail side Z-phase sleeve;
The high-voltage first side A phase sleeve is arranged close to the high-voltage last side Y phase sleeve;
the high-voltage first side B-phase sleeve is arranged close to the high-voltage last side Z-phase sleeve;
the high-voltage head side C-phase sleeve is arranged close to the high-voltage tail side X-phase sleeve;
the high-voltage head side A phase sleeve, the high-voltage tail side Y phase sleeve, the high-voltage head side B phase sleeve, the high-voltage tail side Z phase sleeve, the high-voltage head side C phase sleeve and the high-voltage tail side X phase sleeve are sequentially arranged in a W shape;
The high-voltage head sleeve (7) comprises a high-voltage head side A-phase sleeve, a high-voltage head side B-phase sleeve and a high-voltage head side C-phase sleeve, and the high-voltage tail sleeve (8) comprises a high-voltage tail side X-phase sleeve, a high-voltage tail side Y-phase sleeve and a high-voltage tail side Z-phase sleeve;
The medium-voltage head sleeve (9) comprises a medium-voltage head side Am phase sleeve, a medium-voltage head side Bm phase sleeve and a medium-voltage head side Cm phase sleeve, and the medium-voltage tail sleeve (10) comprises a medium-voltage tail side Xm phase sleeve, a medium-voltage tail side Ym phase sleeve and a medium-voltage tail side Zm phase sleeve;
The low-voltage head sleeve (11) comprises a low-voltage head side a-phase sleeve, a low-voltage head side b-phase sleeve and a low-voltage head side c-phase sleeve, and the low-voltage tail sleeve (12) comprises a low-voltage tail side x-phase sleeve, a low-voltage tail side y-phase sleeve and a low-voltage tail side z-phase sleeve.
2. The vehicle-mounted switchable coupling group test transformer according to claim 1, wherein the top of the transformer tank housing (6) is stepped and comprises at least two height surfaces, and the height difference of each height surface is larger than a set threshold value.
3. The vehicle-mounted switchable coupling group test transformer according to claim 2, characterized in that the transformer further comprises a current transformer (13), the current transformer (13) being arranged on a side wall of the transformer tank housing (6);
The low-voltage head sleeve (11) and the low-voltage tail sleeve (12) are connected with external equipment, and a primary winding of the current transformer (13) is connected in series in a power supply loop of the low-voltage winding (4).
4. A method of using a test transformer based on a vehicle-mounted switchable coupling group according to any of claims 1-3, comprising the steps of:
Acquiring a needed transformer connection mode;
when the connection mode of the transformer for the test is YNyn <0 > yn <0 >, X, Y, Z of the high-voltage end sleeve (8) is connected, xm, ym and Zm of the medium-voltage end sleeve (10) are connected, and x, y and z of the low-voltage end sleeve (12) are connected;
When the connection mode of the transformer for the test is YNyn d11, X, Y, Z of the high-voltage end sleeve (8) is connected, xm, ym and Zm of the medium-voltage end sleeve (10) are connected, a of the low-voltage end sleeve (11) is connected with y of the low-voltage end sleeve (12), b of the low-voltage end sleeve (11) is connected with z of the low-voltage end sleeve (12), and c of the low-voltage end sleeve (11) is connected with x of the low-voltage end sleeve (12);
When the connection mode of the transformer for the test is YNd11d11, X, Y, Z of the high-voltage end sleeve (8) is connected, am of the medium-voltage end sleeve (9) is connected with Ym of the medium-voltage end sleeve (10), bm of the medium-voltage end sleeve (9) is connected with Zm of the medium-voltage end sleeve (10), cm of the medium-voltage end sleeve (9) is connected with Xm of the medium-voltage end sleeve (10), a of the low-voltage end sleeve (11) is connected with y of the low-voltage end sleeve (12), b of the low-voltage end sleeve (11) is connected with z of the low-voltage end sleeve (12), and c of the low-voltage end sleeve (11) is connected with x of the low-voltage end sleeve (12);
When the connection mode of the transformer for the test is YNd11yn0, X, Y, Z of the high-voltage end sleeve (8) is connected, am of the medium-voltage end sleeve (9) is connected with Ym of the medium-voltage end sleeve (10), bm of the medium-voltage end sleeve (9) is connected with Zm of the medium-voltage end sleeve (10), cm of the medium-voltage end sleeve (9) is connected with Xm of the medium-voltage end sleeve (10), and x, y and z of the low-voltage end sleeve (12) are connected;
When the connection mode of the transformer for the test is Dd0d0, A of the high-voltage head sleeve (7) is connected with Y of the high-voltage end sleeve (8), B of the high-voltage head sleeve (7) is connected with Z of the high-voltage end sleeve (8), C of the high-voltage head sleeve (7) is connected with X of the high-voltage end sleeve (8), am of the medium-voltage head sleeve (9) is connected with Ym of the medium-voltage end sleeve (10), bm of the medium-voltage head sleeve (9) is connected with Zm of the medium-voltage end sleeve (10), cm of the medium-voltage head sleeve (9) is connected with Xm of the medium-voltage end sleeve (10), a of the low-voltage head sleeve (11) is connected with Y of the low-voltage end sleeve (12), B of the low-voltage head sleeve (11) is connected with Z of the low-voltage end sleeve (12), and C of the low-voltage head sleeve (11) is connected with X of the low-voltage end sleeve (12);
When the connection mode of the transformer for the test is Dyn1yn1, A of the high-voltage head sleeve (7) is connected with Y of the high-voltage end sleeve (8), B of the high-voltage head sleeve (7) is connected with Z of the high-voltage end sleeve (8), C of the high-voltage head sleeve (7) is connected with X of the high-voltage end sleeve (8), xm, ym and Zm of the medium-voltage end sleeve (10) are connected, and X, Y and Z of the low-voltage end sleeve (12) are connected;
When the connection mode of the transformer for the test is Dd0yn1, A of a high-voltage head sleeve (7) is connected with Y of a high-voltage end sleeve (8), B of the high-voltage head sleeve (7) is connected with Z of the high-voltage end sleeve (8), C of the high-voltage head sleeve (7) is connected with X of the high-voltage end sleeve (8), am of a medium-voltage head sleeve (9) is connected with Ym of a medium-voltage end sleeve (10), bm of the medium-voltage head sleeve (9) is connected with Zm of the medium-voltage end sleeve (10), cm of the medium-voltage head sleeve (9) is connected with Xm of the medium-voltage end sleeve (10), and X, Y and Z of a low-voltage end sleeve (12) are connected;
when the transformer connection mode for the test is Dyn1d0, the A of the high-voltage head sleeve (7) is connected with the Y of the high-voltage end sleeve (8), the B of the high-voltage head sleeve (7) is connected with the Z of the high-voltage end sleeve (8), the C of the high-voltage head sleeve (7) is connected with the X of the high-voltage end sleeve (8), the Xm, the Ym and the Zm of the medium-voltage end sleeve (10) are connected, the a of the low-voltage head sleeve (11) is connected with the Y of the low-voltage end sleeve (12), the B of the low-voltage head sleeve (11) is connected with the Z of the low-voltage end sleeve (12), and the C of the low-voltage head sleeve (11) is connected with the X of the low-voltage end sleeve (12).
CN202310813595.1A 2023-07-04 2023-07-04 Vehicle-mounted transformer for testing of convertible coupling group and use method Active CN116798752B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB549861A (en) * 1940-07-23 1942-12-10 British Thomson Houston Co Ltd Improvements in and relating to electric transformers
CN108305762A (en) * 2017-12-20 2018-07-20 国网北京市电力公司 Capacitance-adjustable transformer and changing pressure operation method
CN108736360A (en) * 2017-04-18 2018-11-02 北京南瑞电研华源电力技术有限公司 A kind of integration loaded capacity regulating voltage regulating power distribution station
CN109378200A (en) * 2018-11-21 2019-02-22 特变电工湖南电气有限公司 A kind of loaded capacity regulating voltage regulating photovoltaic transformer
CN110111985A (en) * 2018-12-21 2019-08-09 海南金盘智能科技股份有限公司 Transformer group
CN110620001A (en) * 2018-06-20 2019-12-27 特变电工衡阳变压器有限公司 Test transformer
CN213340044U (en) * 2020-11-17 2021-06-01 中国电力工程顾问集团西南电力设计院有限公司 220kV three-phase integrated three-winding transformer with balanced windings

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB549861A (en) * 1940-07-23 1942-12-10 British Thomson Houston Co Ltd Improvements in and relating to electric transformers
CN108736360A (en) * 2017-04-18 2018-11-02 北京南瑞电研华源电力技术有限公司 A kind of integration loaded capacity regulating voltage regulating power distribution station
CN108305762A (en) * 2017-12-20 2018-07-20 国网北京市电力公司 Capacitance-adjustable transformer and changing pressure operation method
CN110620001A (en) * 2018-06-20 2019-12-27 特变电工衡阳变压器有限公司 Test transformer
CN109378200A (en) * 2018-11-21 2019-02-22 特变电工湖南电气有限公司 A kind of loaded capacity regulating voltage regulating photovoltaic transformer
CN110111985A (en) * 2018-12-21 2019-08-09 海南金盘智能科技股份有限公司 Transformer group
CN213340044U (en) * 2020-11-17 2021-06-01 中国电力工程顾问集团西南电力设计院有限公司 220kV three-phase integrated three-winding transformer with balanced windings

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