CN112289560A - 12-pulse group 36-pulse rectifier transformer structure and method for reducing harmonic influence - Google Patents
12-pulse group 36-pulse rectifier transformer structure and method for reducing harmonic influence Download PDFInfo
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- CN112289560A CN112289560A CN202011151699.3A CN202011151699A CN112289560A CN 112289560 A CN112289560 A CN 112289560A CN 202011151699 A CN202011151699 A CN 202011151699A CN 112289560 A CN112289560 A CN 112289560A
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- 238000000034 method Methods 0.000 title claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 13
- 238000004804 winding Methods 0.000 claims description 7
- 238000009434 installation Methods 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 230000010363 phase shift Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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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
- H01F27/2823—Wires
- H01F27/2828—Construction of conductive connections, of leads
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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
- H01F27/08—Cooling; Ventilating
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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
- H01F27/2876—Cooling
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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
- H01F27/29—Terminals; Tapping arrangements for signal inductances
-
- 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
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
Abstract
The invention relates to a 12-pulse group 36-pulse rectifier transformer structure and a method for reducing harmonic influence, and belongs to the technical field of transformer manufacturing. The technical scheme is as follows: the grid side coils of the three 12-pulse rectifier transformers adopt different modes, one 12-pulse rectifier transformer is arranged according to a normal mode, the other two 12-pulse rectifier transformers respectively carry out phase shifting on the grid side coils by +/-20 degrees, the phase shifting of the grid side coils of the two 12-pulse rectifier transformers realizes that the phase difference between adjacent output ends of the valve side coils of the three 12-pulse rectifier transformers is 10 degrees, a 36-pulse rectifier transformer is formed, and the harmonic wave influence of the parallel operation of a plurality of transformers is reduced. The invention can effectively reduce the harmonic influence in the power grid; the forced air cooling design is adopted, so that the product cost is reduced, the overall dimension of the product is reduced, and the product is convenient to mount and transport; the net side lead, the valve side d lead and the valve side y lead are arranged on the same side for wiring, so that the wiring is convenient, the operation is easy, and the installation space is saved.
Description
Technical Field
The invention relates to a 12-pulse group 36-pulse rectifier transformer structure and a method for reducing harmonic influence, and belongs to the technical field of transformer manufacturing.
Background
A large number of harmonic sources such as rectification, current conversion and frequency conversion devices are arranged in a power grid, the generated higher harmonics can seriously harm the safe operation of a main transformer and other electrical equipment in the system, particularly, the influence on a transformer is large, and the operation reliability of the power grid is reduced. The harmonic wave can also increase the loss of the transformer product, shorten the service life of the transformer and increase the operation cost.
Disclosure of Invention
The invention aims to provide a 12-pulse group 36-pulse rectifier transformer structure and a method for reducing harmonic influence, which not only reduce the influence of harmonic when a plurality of transformers run in parallel, but also reduce the product cost, simultaneously reduce the overall dimension of a product, facilitate wiring during use, save the installation space, facilitate operation and solve the problems in the background technology.
The technical scheme of the invention is as follows:
a12-pulse group 36-pulse rectifier transformer structure is characterized in that three 12-pulse rectifier transformers adopt different network side coils, one 12-pulse rectifier transformer is arranged according to a normal mode, the other two 12-pulse rectifier transformers respectively carry out phase shift on the network side coils by +/-20 degrees, and three 12-pulse rectifier transformer connecting groups are respectively Dd0y11 and D+20°D0y11 and D-20°d0y1, two 12-pulse rectification transformersPhase shifting of the transformer network side coils realizes that the phase difference between adjacent output ends of valve side coils of three 12-pulse rectifier transformers is 10 degrees, so that a 36-pulse rectifier transformer is formed, and the harmonic influence of parallel operation of a plurality of transformers is reduced.
The 12-pulse rectifier transformer comprises an iron core, a wind shield, a wire clamp supporting structure, a valve side d connecting lead, a net side lead, a valve side y connecting lead, a bracket, a clamping piece and a winding, wherein the winding consists of a net side coil and two valve side coils, the net side coil is arranged outside, the valve side coil is arranged inside, an air guide cylinder is wound outside the net side coil, the net side coil is divided into an upper section and a lower section, a parallel structure with a head at the middle part and a tail at the upper end and the lower end is adopted between the two sections, the outlet of the net side coil is the net side lead, and the three-phase net side lead is an angle connecting lead; the two valve side coils are respectively an upper valve side coil and a lower valve side coil, are of a layered structure and are wound on the same insulating cylinder, the upper valve side coil is positioned on the upper part of the insulating cylinder, the outlet of the upper valve side coil is a valve side d connecting lead, the lower valve side coil is positioned on the lower part of the insulating cylinder, and the outlet of the lower valve side coil is a valve side y connecting lead; the iron core adopts a through screw structure, and the wind shield, the net side lead, the valve side d lead and the valve side y lead are fixedly installed through a lead clamp supporting structure installed on the iron core.
In order to ensure the insulation distance between the outlet ends of the valve side coil and the grid side coil and the lead, the outlet ends of the valve side coil and the grid side coil of the three 12-pulse rectifier transformers are positioned as follows: the terminals of the grid side lead, the valve side d lead and the valve side y lead are all on the same side of the 12-pulse rectifier transformer, and all the wiring terminals are uniformly arranged below the wind shield, so that the product installation space is reduced, and wiring is facilitated during use.
The wind shield and the support at the bottom are eccentrically arranged relative to the center line of the transformer body, so that the insulation distance among the grid side lead, the valve side d connecting lead and the valve side y connecting lead is ensured.
Although the arrangement modes of the grid side lead angle wiring of the three 12-pulse rectifier transformers are different, the difference between each adjacent output ends of the valve side coils of the three 12-pulse rectifier transformers is 10 degrees; however, the terminals of the grid-side leads of the three 12-pulse rectifier transformers are uniformly arranged at the same positions of the 12-pulse rectifier transformers and are positioned between the valve-side d-lead and the valve-side y-lead.
The wire clamp supporting structure is a supporting frame and is fixed on the clamping piece of the iron core.
A method for reducing the harmonic influence of the parallel operation of a plurality of transformers, every three of 12-pulse rectifier transformers are combined into a group to form a 36-pulse rectifier transformer wiring mode; the network side coils of the three 12-pulse rectifier transformers adopt different modes, one 12-pulse rectifier transformer is arranged according to a normal mode, the other two 12-pulse rectifier transformers respectively carry out phase shift on the network side coils by +/-20 degrees, and the connection groups of the three 12-pulse rectifier transformers are Dd0y11 and D+20°D0y11 and D-20°d0y1, phase shifting of two 12-pulse rectifier transformer network side coils is used for realizing that the phase difference between each adjacent output end of three 12-pulse rectifier transformer valve side coils is 10 degrees, a 36-pulse rectifier transformer is formed, and the harmonic influence of parallel operation of a plurality of transformers is reduced.
The three 12-pulse rectifier transformers respectively mark each connecting terminal and are connected with each corresponding connecting terminal when in use.
The invention has the beneficial effects that: the invention can effectively reduce the harmonic influence in the power grid; the forced air cooling design is adopted, so that the product cost is reduced, the overall dimension of the product is reduced, and the product is convenient to mount and transport; the net side lead, the valve side d lead and the valve side y lead are arranged on the same side for wiring, so that the wiring is convenient, the operation is easy, and the installation space is saved.
Drawings
FIG. 1 is a vector diagram of three 12-pulse rectifier transformers according to the present invention;
FIG. 2 is a schematic structural diagram of a 12-pulse rectifier transformer Dd0y11 according to the present invention;
FIG. 3 is a side view of FIG. 2;
FIG. 4 shows a 12-pulse rectifier transformer D of the present invention+20°A structural schematic diagram of d0y 11;
FIG. 5 is a side view of FIG. 4;
FIG. 6 shows a 12-pulse rectifier transformer D according to the present invention-20°A structural schematic diagram of d0y 1;
FIG. 7 is a side view of FIG. 6;
in the figure: the device comprises an iron core 1, a wind shield 2, a wire clamp supporting structure 3, a valve side d connecting lead 4, a net side lead 5, a valve side y connecting lead 6, a bracket 7, a clamp 8, a winding 9 and a body central line 10.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings.
A12-pulse group 36-pulse rectifier transformer structure is characterized in that three 12-pulse rectifier transformers adopt different network side coils, one 12-pulse rectifier transformer is arranged according to a normal mode, the other two 12-pulse rectifier transformers respectively carry out phase shift on the network side coils by +/-20 degrees, and three 12-pulse rectifier transformer connecting groups are respectively Dd0y11 and D+20°D0y11 and D-20°d0y1, phase shifting of two 12-pulse rectifier transformer network side coils is used for realizing that the phase difference between each adjacent output end of three 12-pulse rectifier transformer valve side coils is 10 degrees, a 36-pulse rectifier transformer is formed, and the harmonic influence of parallel operation of a plurality of transformers is reduced.
The 12-pulse rectifier transformer comprises an iron core 1, a wind shield 2, a wire clamp supporting structure 3, a valve side d connecting lead 4, a net side lead 5, a valve side y connecting lead 6, a support 7, a clamping piece 8 and a winding 9, wherein the winding 9 consists of a net side coil and two valve side coils, the net side coil is arranged outside, the valve side coils are arranged inside, an air guide cylinder is wound outside the net side coil, the net side coil is divided into an upper section and a lower section, a parallel structure with a head at the middle part and a tail at the upper end and the lower end is adopted between the two sections, the outlet of the net side coil is the net side lead 5, and the three-phase net side lead 5 is an angle connecting lead; the two valve side coils are respectively an upper valve side coil and a lower valve side coil, are of a layered structure and are wound on the same insulating cylinder, the upper valve side coil is positioned on the upper part of the insulating cylinder, the outlet of the upper valve side coil is a valve side d connecting lead wire 4, the lower valve side coil is positioned on the lower part of the insulating cylinder, and the outlet of the lower valve side coil is a valve side y connecting lead wire 6; the iron core 1 adopts a through screw structure, and the wind shield 2, the net side lead 5, the valve side d lead 4 and the valve side y lead 6 are fixedly arranged through a lead clamp supporting structure 3 arranged on the iron core 1.
In order to ensure the insulation distance between the outlet ends of the valve side coil and the grid side coil and the lead, the outlet ends of the valve side coil and the grid side coil of the three 12-pulse rectifier transformers are positioned as follows: the terminals of the grid side lead 5, the valve side d lead 4 and the valve side y lead 6 are all on the same side of the 12-pulse rectifier transformer, and all the wiring terminals are uniformly arranged below the wind shield 2, so that the product installation space is reduced, and wiring is facilitated.
The wind shield 2 and the bottom support 7 are eccentrically arranged relative to the center line 10 of the transformer body, so that the insulation distance among the net side lead 5, the valve side d lead 4 and the valve side y lead 6 is ensured.
Although the arrangement modes of the 5-angle connecting lines of the grid-side leads of the three 12-pulse rectifier transformers are different, the difference between the adjacent output ends of the valve-side coils of the three 12-pulse rectifier transformers is 10 degrees; however, the terminals of the grid-side lead 5 of the three 12-pulse rectifier transformers are uniformly arranged at the same positions of the 12-pulse rectifier transformers between the valve-side d lead 4 and the valve-side y lead 6.
The lead clamp supporting structure 3 is a supporting frame and is fixed on a clamping piece 8 of the iron core.
A method for reducing the harmonic influence of the parallel operation of a plurality of transformers, every three of 12-pulse rectifier transformers are combined into a group to form a 36-pulse rectifier transformer wiring mode; the network side coils of the three 12-pulse rectifier transformers adopt different modes, one 12-pulse rectifier transformer is arranged according to a normal mode, the other two 12-pulse rectifier transformers respectively carry out phase shift on the network side coils by +/-20 degrees, and the connection groups of the three 12-pulse rectifier transformers are Dd0y11 and D+20°D0y11 and D-20°d0y1, phase shifting of two 12-pulse rectifier transformer network side coils is used for realizing that the phase difference between each adjacent output end of three 12-pulse rectifier transformer valve side coils is 10 degrees, a 36-pulse rectifier transformer is formed, and the harmonic influence of parallel operation of a plurality of transformers is reduced.
The three 12-pulse rectifier transformers respectively mark each connecting terminal and are connected with each corresponding connecting terminal when in use.
Claims (7)
1. A12-pulse group 36-pulse rectifier transformer structure is characterized in that: the grid side coils of the three 12-pulse rectifier transformers adopt different modes, one 12-pulse rectifier transformer is arranged according to a normal mode, the other two 12-pulse rectifier transformers respectively carry out phase shifting on the grid side coils by +/-20 degrees, the phase shifting of the grid side coils of the two 12-pulse rectifier transformers realizes that the phase difference between adjacent output ends of the valve side coils of the three 12-pulse rectifier transformers is 10 degrees, a 36-pulse rectifier transformer is formed, and the harmonic wave influence of the parallel operation of a plurality of transformers is reduced.
2. The 12-pulse group 36-pulse rectifier transformer structure of claim 1, wherein: the 12-pulse rectifier transformer comprises an iron core (1), a wind shield (2), a wire clamp supporting structure (3), a valve side d connecting lead (4), a grid side lead (5), a valve side y connecting lead (6), a support (7), a clamping piece (8) and a winding (9), wherein the winding (9) consists of a grid side coil and two valve side coils, the grid side coil is arranged outside, the valve side coil is arranged inside, an air guide cylinder is wound outside the grid side coil, the grid side coil is divided into an upper section and a lower section, a parallel structure with a head at the middle part and a tail at the upper end and the lower end is adopted between the two sections, the head of the grid side coil is the grid side lead (5), and the three-phase grid side lead (5) is an angle connecting lead; the two valve side coils are respectively an upper valve side coil and a lower valve side coil, are of a layered structure and are wound on the same insulating cylinder, the upper valve side coil is positioned on the upper part of the insulating cylinder, the outlet of the upper valve side coil is a valve side d connecting lead (4), the lower valve side coil is positioned on the lower part of the insulating cylinder, and the outlet of the lower valve side coil is a valve side y connecting lead (6); the iron core (1) adopts a through screw structure, and the wind shield (2), the net side lead (5), the valve side d lead (4) and the valve side y lead (6) are fixedly installed through a lead clamp supporting structure (3) installed on the iron core (1).
3. The 12-pulse group 36-pulse rectifier transformer structure of claim 2, wherein: the terminals of the grid side lead (5), the valve side d connecting lead (4) and the valve side y connecting lead (6) are all arranged on the same side of the 12-pulse rectifier transformer, and all the connecting terminals are arranged below the wind shield (2).
4. The 12-pulse group 36-pulse rectifier transformer structure of claim 3, wherein: the wind deflector (2) and the bottom bracket (7) are eccentrically arranged relative to the central line (10) of the air deflector body.
5. The 12-pulse group 36-pulse rectifier transformer structure of claim 2, wherein: the wiring terminals of the grid side leads (5) of the three 12-pulse rectifier transformers are uniformly arranged at the same position of the 12-pulse rectifier transformers and are positioned between the valve side d connecting lead (4) and the valve side y connecting lead (6).
6. The 12-pulse group 36-pulse rectifier transformer structure of claim 2, wherein: the lead clamp supporting structure (3) is a supporting frame and is fixed on a clamping piece (8) of the iron core.
7. A method for reducing the harmonic influence of the parallel operation of a plurality of transformers is characterized in that: every three 12-pulse rectifier transformers are combined into a group to form a 36-pulse rectifier transformer wiring mode; the grid side coils of the three 12-pulse rectifier transformers adopt different modes, one 12-pulse rectifier transformer is arranged according to a normal mode, the other two 12-pulse rectifier transformers respectively carry out phase shifting on the grid side coils by +/-20 degrees, the phase shifting of the grid side coils of the two 12-pulse rectifier transformers realizes that the phase difference between adjacent output ends of the valve side coils of the three 12-pulse rectifier transformers is 10 degrees, a 36-pulse rectifier transformer is formed, and the harmonic wave influence of the parallel operation of a plurality of transformers is reduced.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011151699.3A CN112289560A (en) | 2020-10-26 | 2020-10-26 | 12-pulse group 36-pulse rectifier transformer structure and method for reducing harmonic influence |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011151699.3A CN112289560A (en) | 2020-10-26 | 2020-10-26 | 12-pulse group 36-pulse rectifier transformer structure and method for reducing harmonic influence |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113611504A (en) * | 2021-07-23 | 2021-11-05 | 保定天威保变电气股份有限公司 | Novel flexible direct current converter transformer and assembly method |
| CN114006375A (en) * | 2021-10-22 | 2022-02-01 | 四川宏华电气有限责任公司 | Device and method for suppressing higher harmonic waves of electric fracturing |
| CN114006375B (en) * | 2021-10-22 | 2024-04-30 | 四川宏华电气有限责任公司 | Device and method for inhibiting electric fracturing higher harmonic |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113611504A (en) * | 2021-07-23 | 2021-11-05 | 保定天威保变电气股份有限公司 | Novel flexible direct current converter transformer and assembly method |
| CN114006375A (en) * | 2021-10-22 | 2022-02-01 | 四川宏华电气有限责任公司 | Device and method for suppressing higher harmonic waves of electric fracturing |
| CN114006375B (en) * | 2021-10-22 | 2024-04-30 | 四川宏华电气有限责任公司 | Device and method for inhibiting electric fracturing higher harmonic |
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