CN107978434B - Inverse Scott transformer with harmonic elimination function - Google Patents
Inverse Scott transformer with harmonic elimination function Download PDFInfo
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- CN107978434B CN107978434B CN201711344694.0A CN201711344694A CN107978434B CN 107978434 B CN107978434 B CN 107978434B CN 201711344694 A CN201711344694 A CN 201711344694A CN 107978434 B CN107978434 B CN 107978434B
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- Prior art keywords
- transformer
- harmonic elimination
- harmonic
- inductor
- star
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/266—Fastening or mounting the core on casing or support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
-
- 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
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/324—Insulation between coil and core, between different winding sections, around the coil; Other insulation structures
-
- 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
- H01F27/40—Structural association with built-in electric component, e.g. fuse
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Regulation Of General Use Transformers (AREA)
Abstract
An inverse Scott transformer with a harmonic elimination function relates to the field of transformers. Higher harmonics of a certain frequency often cause the traction device to fail to function properly, even with false control commands. The invention comprises a bracket, an M transformer core and a T transformer core, wherein an M transformer net side coil and an M transformer station side coil are arranged outside the M transformer core, a T transformer net side coil and a T transformer station side coil are arranged outside the T transformer core, an insulating fixing frame is arranged between the M transformer core and the T transformer core, the harmonic elimination component group is arranged on the insulating fixing frame and comprises a T transformer harmonic elimination inductor, an M transformer harmonic elimination inductor, a star-shaped harmonic elimination capacitor, a triangle harmonic elimination capacitor, a star-shaped harmonic elimination inductor and a triangle harmonic elimination inductor, and the harmonic elimination component group and the M transformer core and the T transformer core at two sides keep equal air gaps. The technical scheme eliminates the higher harmonic wave, prevents the higher harmonic wave from interfering traction equipment, and ensures the normal operation of the equipment.
Description
Technical Field
The invention relates to the field of transformers, in particular to an inverse Scott transformer with a harmonic elimination function.
Background
With the progress of high-speed rail technology in China, locomotives with speed per hour of more than 300 km begin to be widely applied, the power device of the locomotives generally adopts an alternating current-direct current-alternating current power supply mode, namely, single-phase power supply of a railway power grid is adopted to drive the locomotives by a vehicle-mounted transformer-rectification inversion integrated device-direct current-rectification inversion integrated device-three-phase alternating current-locomotive three-phase alternating current motor, the process is reversible, the core technology of the reversible process is automatic switching between a rectification state and an inversion state, the automatic power supply of the locomotives to the railway power grid is ensured when the locomotives enter a station for braking, the railway power grid has very high power supply efficiency and energy saving effect, but the vehicle-mounted transformer in the system does not intercept fundamental waves and high harmonics, and a certain number of high harmonics exist in the railway power grid, the high-order harmonic wave is called as electric pollution, in a railway traction station, an inverse Scott transformer is used for converting two-phase alternating current of a railway network into three-phase alternating current to provide power for equipment of the traction station, but because the transformer is required to take power from a railway power network (short for road network), the high-order harmonic wave is led into the transformer from two-phase sides (short for network sides) of the road network and is transmitted to the three-phase sides of the transformer, namely one side (short for station side) of the traction station, and further is continuously transmitted to the equipment of the power station, the high-order harmonic wave is often expressed as a harmonic wave of a certain specific frequency, the harmonic wave can be detected by an oscilloscope, the high-order locomotive is controlled by the direct association of the equipment of the traction station, the high-order harmonic wave of a certain specific frequency often causes the failure of the normal operation of the traction equipment, even the error control instruction occurs, the consequences are extremely serious.
Disclosure of Invention
The invention aims to solve the technical problems and provide the technical task of perfecting and improving the prior art scheme, and provides the inverse Scott transformer with the function of eliminating the harmonic wave so as to eliminate the higher harmonic wave and avoid the interference to the used electrical equipment. For this purpose, the present invention adopts the following technical scheme.
The utility model provides an inverse Scott transformer with eliminate harmonic function, includes the support, locates M become iron core and the T iron core that becomes on the support, M become the iron core and be equipped with M and become net side coil and M and become the side coil that becomes, T become the iron core and be equipped with T and become net side coil and T and become the side coil outward, the transformer still including be used for eliminating harmonic resonance component group, M become and be equipped with insulating mount between the iron core and the T become the iron core, resonance component group locate insulating mount on, resonance component group include T become and eliminate harmonic inductance, M become and eliminate harmonic inductance, star and eliminate harmonic capacitance, triangle-shaped and eliminate harmonic capacitance, star and eliminate harmonic inductance and triangle-shaped and eliminate harmonic inductance, resonance component group and both sides M become iron core and T and become the iron core and all keep equal air gap, as T and become the magnetic circuit that eliminates harmonic inductance, M become harmonic inductance, star and triangle-shaped and eliminate harmonic inductance. By adding the harmonic elimination component group for eliminating the harmonic and the corresponding harmonic elimination structure in the inverse Scott transformer, the higher harmonic can be effectively eliminated, the working interference of the higher harmonic to the traction equipment is prevented, and the normal working of the used electric equipment is ensured.
As a further improvement and supplement to the above-mentioned technical solutions, the present invention also includes the following additional technical features.
One end of the T-shaped transformer harmonic elimination inductor is grounded, and the other end of the T-shaped transformer harmonic elimination inductor is connected in series at the tail end of the T-shaped transformer net side coil; and one end of the M-transformer harmonic elimination inductor is grounded, and the other end of the M-transformer harmonic elimination inductor is connected in series at the tail end of the M-transformer net side coil. The network side is connected with the inductance coils in series, so that most of harmonic voltage drops on the inductance coils connected in series, harmonic current is greatly weakened, and real-time interception of higher harmonics is realized.
The triangle eliminating harmonic capacitor and the triangle eliminating harmonic inductor are connected in series first and then are connected into a triangle, and three endpoints of the triangle are correspondingly connected with 3 endpoints of the reverse Scott transformer. The triangle harmonic path, the circuit connected in series by the inductance and the capacitance, can present zero impedance to a certain harmonic as long as the parameter is reasonable, and connecting the inductance and the capacitance to the terminal on the side is equivalent to directly short-circuiting the subharmonic at the terminal, and does not interfere the external equipment.
The star-shaped harmonic elimination capacitor and the star-shaped harmonic elimination inductor are connected in series and then are connected into a star shape, the center point of the star shape is correspondingly connected with the center point of the side of the inverse Scott transformer, and the end points of the star shape are correspondingly connected with the 3 end points of the side of the inverse Scott transformer. The side is provided with a star-shaped harmonic elimination network, and the center point of the star-shaped harmonic elimination network is connected to the neutral point of the T-shaped transformer, so that the side harmonic directly flows into the ground, and the higher harmonic of a certain number of times is thoroughly eliminated.
The 3 endpoints of the triangle and the star are in one-to-one correspondence and are co-points, and the connecting lines of the triangle and the 3 endpoints of the side and the connecting lines of the 3 endpoints of the star and the 3 endpoints of the side are two-to-two and are in 3 collineation. The collinear connection can simplify the connection structure and save the wire material.
The beneficial effects are that: the device can effectively eliminate the interference and damage of higher harmonic waves to traction equipment, improves the running safety of high-speed rails, and has the advantages of simple structure, convenient connection and low cost.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a schematic diagram of the circuit connection of the present invention.
In the figure: 1-M variable iron core; 2-T transformer core; 3-M network side coils; 4-M transformer side coils; 5-T variable network side coil; 6-T transformer side coils; 7-T transformer eliminating harmonic inductance; 8-M transformer eliminating harmonic inductance; 9-star eliminating harmonic capacitance; 10-triangle harmonic elimination capacitance; 11-star eliminating harmonic inductance; 12-triangle harmonic inductance elimination; 13-an insulating fixing frame; 14-a bracket; 15-an air gap; a 16-T variable net side coil end; 17-M is changed at the end of the net side coil; 18-triangle; 19-side; 20-star shape.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the attached drawings.
As shown in fig. 1-2, an inverse scott transformer with harmonic elimination function comprises a bracket 14, an M-transformer core 1 and a T-transformer core 2 which are arranged on the bracket 14, wherein an M-transformer net side coil 3 and an M-transformer side coil 4 are arranged outside the M-transformer core 1, a T-transformer net side coil 5 and a T-transformer side coil 6 are arranged outside the T-transformer core 2, an insulating fixing frame 13 is arranged between the M-transformer core 1 and the T-transformer core 2, the harmonic elimination component is arranged on the insulating fixing frame 13, the harmonic elimination component comprises a T-transformer harmonic elimination inductor 7, an M-transformer harmonic elimination inductor 8, a star-shaped harmonic elimination capacitor 9, a triangular harmonic elimination capacitor 10, a star-shaped harmonic elimination inductor 11 and a triangular harmonic elimination inductor 12, and an air gap 15 which is equal to the M-transformer cores 1 and the T-transformer core 2 on two sides is used as a magnetic circuit of the T-transformer harmonic elimination inductor 7, the M-transformer harmonic elimination inductor 8, the star-shaped harmonic elimination inductor 11 and the triangular harmonic elimination inductor 12.
In order to intercept higher harmonics at the network side of the two-phase power supply input end of the transformer, one end of the T-shaped harmonic elimination inductor 7 is grounded, and the other end of the T-shaped harmonic elimination inductor is connected in series with the tail end 16 of the T-shaped network side coil; one end of the M-transformer harmonic elimination inductor 8 is grounded, and the other end of the M-transformer harmonic elimination inductor is connected in series with the tail end 17 of the M-transformer net side coil. The network side is connected with the inductance coils in series, so that most of harmonic voltage drops on the inductance coils connected in series, harmonic current is greatly weakened, and real-time interception of higher harmonics is realized.
In order to eliminate higher harmonics at the side 19, the triangle eliminating harmonic capacitor 10 and the triangle eliminating harmonic inductor 12 are connected in series first and then connected into a triangle 18, and three end points of the triangle 18 are correspondingly connected with 3 end points of the side 19 of the inverse scott transformer. The triangle harmonic path, the circuit connected in series by the inductance and capacitance, can present zero impedance to a certain harmonic as long as the parameters are reasonable, and connecting such inductance and capacitance to the end point of the side 19 is equivalent to directly short-circuiting the subharmonic at the end point, and does not interfere with the external equipment.
In order to eliminate the harmonic wave more thoroughly, the star eliminating harmonic wave capacitor 9 and the star eliminating harmonic wave inductor 11 are connected in series first and then connected into a star 20, the center point of the star 20 is correspondingly connected with the center point of the side 19 of the inverse Scott transformer, and the end points of the star 20 are correspondingly connected with the 3 end points of the side 19 of the inverse Scott transformer. The side 19 builds a star-shaped network for eliminating the harmonic wave, and the center point of the star-shaped network is connected to the neutral point of the T-shaped transformer, so that the harmonic wave of the side 19 directly flows into the ground, and the higher harmonic wave of a certain frequency is thoroughly eliminated.
To simplify the connection structure, the 3 end points of the triangle 18 and the star 20 are in one-to-one correspondence, and the connection line of the triangle 18 and the 3 end points of the side 19 and the connection line of the 3 end points of the star 20 and the 3 end points of the side 19 are two-in-one 3 collineation. The collinear connection can simplify the connection structure and save the wire material.
By adding the harmonic elimination component group for eliminating the harmonic and the corresponding harmonic elimination structure in the inverse Scott transformer, the higher harmonic can be effectively eliminated, the working interference of the higher harmonic to the traction equipment is prevented, and the normal working of the used electric equipment is ensured
The inverse scott transformer with harmonic elimination function shown in fig. 1-2 is a specific embodiment of the present invention, has already demonstrated the essential features and improvements of the present invention, and can be modified in terms of shape, structure, etc. according to practical use requirements, and in the light of the present invention, all are within the scope of protection of the present invention.
Claims (2)
1. The utility model provides an inverse Scott transformer with eliminate harmonic function, includes the support, locates M on the support and become the iron core with T, M become the iron core and be equipped with M outside the iron core and become net side coil and M become the side coil, T become the iron core and be equipped with T outside the iron core and become net side coil and T become the side coil, its characterized in that: the transformer also comprises a harmonic elimination component group used for eliminating harmonic, an insulating fixing frame is arranged between the M transformer core and the T transformer core, the harmonic elimination component group is arranged on the insulating fixing frame, the harmonic elimination component group comprises a T transformer harmonic elimination inductor, an M transformer harmonic elimination inductor, a star harmonic elimination capacitor, a triangle harmonic elimination capacitor, a star harmonic elimination inductor and a triangle harmonic elimination inductor, and the harmonic elimination component group and the M transformer core and the T transformer core at two sides respectively keep equal air gaps to be used as magnetic circuits of the T transformer harmonic elimination inductor, the M transformer harmonic elimination inductor, the star harmonic elimination inductor and the triangle harmonic elimination inductor;
the triangle eliminating harmonic capacitor and the triangle eliminating harmonic inductor are connected in series firstly and then are connected into a triangle, and three endpoints of the triangle are correspondingly connected with 3 endpoints of the reverse Scott transformer;
the star-shaped harmonic elimination capacitor and the star-shaped harmonic elimination inductor are connected in series and then connected into a star shape, the center point of the star shape is correspondingly connected with the center point of the side of the inverse Scott transformer, and the end points of the star shape are correspondingly connected with the 3 end points of the side of the inverse Scott transformer;
the 3 endpoints of the triangle and the star are in one-to-one correspondence and are co-points, and the connecting lines of the triangle and the 3 endpoints of the side and the connecting lines of the 3 endpoints of the star and the 3 endpoints of the side are two-to-two and are in 3 collineation.
2. An inverse scott transformer with harmonic cancellation function according to claim 1, characterized in that: one end of the T-shaped transformer harmonic elimination inductor is grounded, and the other end of the T-shaped transformer harmonic elimination inductor is connected in series at the tail end of the T-shaped transformer net side coil; and one end of the M-transformer harmonic elimination inductor is grounded, and the other end of the M-transformer harmonic elimination inductor is connected in series at the tail end of the M-transformer net side coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711344694.0A CN107978434B (en) | 2017-12-15 | 2017-12-15 | Inverse Scott transformer with harmonic elimination function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711344694.0A CN107978434B (en) | 2017-12-15 | 2017-12-15 | Inverse Scott transformer with harmonic elimination function |
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| Publication Number | Publication Date |
|---|---|
| CN107978434A CN107978434A (en) | 2018-05-01 |
| CN107978434B true CN107978434B (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711344694.0A Active CN107978434B (en) | 2017-12-15 | 2017-12-15 | Inverse Scott transformer with harmonic elimination function |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114050035B (en) * | 2021-11-11 | 2023-03-24 | 珠海创宝电子科技有限公司 | Waterproof high-frequency transformer with harmonic wave elimination function |
| CN114974839A (en) * | 2022-05-30 | 2022-08-30 | 重庆科新电气有限公司 | Special 27.5kV dry-type inverse Scott transformer for railway with increased angle ring |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004039923A (en) * | 2002-07-04 | 2004-02-05 | Hitachi Media Electoronics Co Ltd | Transformer |
| CN2727925Y (en) * | 2004-09-20 | 2005-09-21 | 何排枝 | Resonance eliminating voltage transformer |
| CN205195271U (en) * | 2015-12-15 | 2016-04-27 | 河北旭辉电气股份有限公司 | Higher harmonic suppression device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9979375B2 (en) * | 2015-12-22 | 2018-05-22 | Intel IP Corporation | Multi-harmonic matching networks |
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- 2017-12-15 CN CN201711344694.0A patent/CN107978434B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004039923A (en) * | 2002-07-04 | 2004-02-05 | Hitachi Media Electoronics Co Ltd | Transformer |
| CN2727925Y (en) * | 2004-09-20 | 2005-09-21 | 何排枝 | Resonance eliminating voltage transformer |
| CN205195271U (en) * | 2015-12-15 | 2016-04-27 | 河北旭辉电气股份有限公司 | Higher harmonic suppression device |
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| CN107978434A (en) | 2018-05-01 |
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