CN114093609A - Converter transformer's ware body structure - Google Patents
Converter transformer's ware body structure Download PDFInfo
- Publication number
- CN114093609A CN114093609A CN202111453221.0A CN202111453221A CN114093609A CN 114093609 A CN114093609 A CN 114093609A CN 202111453221 A CN202111453221 A CN 202111453221A CN 114093609 A CN114093609 A CN 114093609A
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- China
- Prior art keywords
- converter transformer
- body structure
- core
- iron core
- phase
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 82
- 238000003825 pressing Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000004065 semiconductor Substances 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 description 18
- 230000005540 biological transmission Effects 0.000 description 8
- 239000002390 adhesive tape Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000009827 uniform distribution Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/346—Preventing or reducing leakage fields
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a converter transformer body structure, which comprises a single-phase three-frame four-column type iron core, an upper pressure plate and a clamping piece web plate which are sequentially arranged at the top of the single-phase three-frame four-column type iron core from bottom to top, and a lower cushion plate arranged at the bottom of the single-phase three-frame four-column type iron core, wherein an oil guide groove for providing an oil inlet channel is arranged on the lower cushion plate. Compared with the prior art, the invention has good thermal stability, and can solve the problems of magnetic leakage of the iron core, large pressure difference and uneven stress in the whole body pressing process.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a body structure of a converter transformer.
Background
With the continuous development of national economy, the demand of energy sources is more and more increased. A plurality of extra-high voltage alternating current and direct current power transmission and transformation projects are established in the east and west of China. Compared with alternating current transmission, direct current transmission has the advantages of long transmission distance, large transmission capacity and low loss. Therefore, China already builds a large number of direct current transmission projects.
The converter transformer is used as an important device of a direct current transmission system, and the operation reliability of the converter transformer plays an important role in the normal operation of the direct current transmission system. The existing converter transformer has the following problems:
(1) the thermal stability of the converter transformer in the operation process is insufficient;
(2) the iron core has magnetic leakage, and the distribution of electric and magnetic fields is unreasonable;
(3) the pressure difference is large and the stress is uneven in the whole pressing process of the transformer body due to different coil structure forms and the difference of the rebound coefficients.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a converter transformer body structure, which has good thermal stability and can solve the problems of iron core leakage, large pressure difference and uneven stress in the whole pressing process of the converter transformer body.
The purpose of the invention can be realized by the following technical scheme:
the invention provides a converter transformer body structure, which comprises a single-phase three-frame four-column type iron core, an upper pressure plate and a clamping piece web plate which are sequentially arranged at the top of the single-phase three-frame four-column type iron core from bottom to top, and a lower cushion plate arranged at the bottom of the single-phase three-frame four-column type iron core, wherein an oil guide groove for providing an oil inlet channel is arranged on the lower cushion plate.
Preferably, the upper pressing plate is fixed on the top of the single-phase three-frame four-column iron core in a pressing mode through the web plate of the clamping piece.
Preferably, the upper pressure plate is a split type upper pressure plate used for overcoming the problems of large local pressure difference and uneven stress in the whole body pressing process caused by different converter transformer coil structure forms and rebound coefficient differences.
Preferably, the split type upper pressure plate has four or more than four lobes.
Preferably, the single-phase three-frame four-limb iron core comprises two iron core main limbs, two iron core side limbs, an upper iron yoke arranged at the tops of the two iron core main limbs and the two iron core side limbs, and a lower iron yoke arranged at the bottoms of the two iron core main limbs and the two iron core side limbs.
Preferably, the periphery of each iron core main column is bound by a semiconductor adhesive tape.
Preferably, each of the core main leg, the core side leg, the upper iron yoke and the lower iron yoke is covered with a ground shield.
Preferably, five main column pulling plates are arranged on the periphery of each iron core main column, and three side column pulling plates are arranged on the periphery of each iron core side column.
Preferably, the gap between the adjacent main column pulling plates and the gap between the adjacent side column pulling plates are both 3 mm.
Preferably, the top of the upper iron yoke has a cross-sectional area larger than that of the bottom of the upper iron yoke, and the top of the lower iron yoke has a cross-sectional area smaller than that of the bottom of the lower iron yoke.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, a forced guide oil circulation cooling mode is adopted on the converter body structure, the lower pressing plate is arranged below the converter transformer body, and the oil guide groove is arranged in the lower pressing plate, so that the converter transformer is ensured to have good thermal stability in the operation process.
2. According to the invention, the ground shield is bound or coated on the iron core main column by adopting the semiconductor adhesive tape, and the ground shield is coated on the upper iron yoke, the lower iron yoke and the iron core side column, so that the magnetic leakage of the iron core is reduced, and the uniform distribution of an electric field and a magnetic field is improved.
3. The split upper pressing plate is adopted, so that the phenomena of large pressure difference and uneven stress in the whole body pressing process caused by different coil structure forms and rebound coefficient differences are overcome.
Drawings
Fig. 1 is a schematic structural diagram of a body structure of a converter transformer in this embodiment;
labeled as: 11. the iron core comprises an iron core main column 12, an iron core side column 2, an upper iron yoke 3, a lower iron yoke 4, an upper pressure plate 5, a clamping piece web 6 and a lower backing plate.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
The embodiment provides a body structure of a converter transformer, which comprises a single-phase three-frame four-column iron core, an iron core main column 11, an iron core side column 12, an upper iron yoke 2, a lower iron yoke 3, an upper pressure plate 4, a clamping piece web 5 and a lower backing plate 6.
The single-phase three-frame four-column iron core comprises two iron core main columns 11, two iron core side columns 12, an upper iron yoke 2 arranged at the tops of the two iron core main columns 11 and the two iron core side columns 12 and a lower iron yoke 3 arranged at the bottoms of the two iron core main columns 11 and the two iron core side columns 12, wherein the periphery of the iron core main column 11 is bound by adopting a semiconductor adhesive tape or is coated with a ground screen on the iron core main column, and the upper iron yoke 2, the lower iron yoke 3 and the iron core side columns 12 are coated with the ground screen, so that the magnetic leakage of the single-phase three-frame four-column iron core 1 is reduced, and the uniform distribution of electricity and magnetic fields is improved.
The top of the single-phase three-frame four-column iron core is sequentially provided with a clamping piece web 5 and an upper pressing plate 4 from bottom to top, the upper pressing plate 4 is stressed through the clamping piece web 5 and is fixed on the single-phase three-frame four-column iron core, and the upper pressing plate 4 is of a four-piece or more than four-piece split structure and is used for overcoming the problems that the local pressure difference is large and the stress is uneven in the whole pressing process of the transformer body due to different coil structural forms and rebound coefficients. When the converter transformer is pressed, all coil groups of all converter transformers are ensured to reach the most satisfactory compression state by adjusting the pressure intensity of the hydraulic pumps at different positions.
The bottom of the single-phase three-frame four-column type iron core is provided with a lower cushion plate 6, an oil guide groove used for providing an oil inlet channel is arranged on the lower cushion plate 6, the size and the position of the oil guide groove are calculated according to the arrangement and the cooling power of coils of the converter transformer, and therefore the converter transformer is guaranteed to have good thermal stability in the operation process of a forced guide oil circulation cooling mode.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The transformer body structure of the converter transformer is characterized by comprising a single-phase three-frame four-column type iron core, an upper pressing plate and a clamping piece web (5) which are sequentially arranged at the top of the single-phase three-frame four-column type iron core from bottom to top, and a lower cushion plate (6) arranged at the bottom of the single-phase three-frame four-column type iron core, wherein an oil guide groove for providing an oil inlet channel is formed in the lower cushion plate (6).
2. The body structure of a converter transformer according to claim 1, wherein said upper press plate (4) is fixed on top of said single-phase three-frame four-limb core (1) by pressing through said clamping web (5).
3. The body structure of a converter transformer according to claim 2, characterized in that said upper pressure plate (4) is a split upper pressure plate for overcoming the problems of large local pressure difference and non-uniform stress during the whole body pressing process caused by different coil structure forms and different rebound coefficients of the converter transformer.
4. The body structure of a converter transformer according to claim 3, wherein said split upper pressure plate has four or more than four segments.
5. The body structure of a converter transformer according to claim 1, wherein said single-phase three-frame four-limb core comprises two core main limbs (11), two core side limbs (12), an upper yoke (2) disposed at the top of the two core main limbs (11) and the two core side limbs (12), and a lower yoke (3) disposed at the bottom of the two core main limbs (11) and the two core side limbs (11).
6. The body structure of a converter transformer according to claim 5, characterized in that the periphery of each said core main column (11) is bound with a semiconductor tape.
7. The body structure of a converter transformer according to claim 5, wherein each of said core main leg (11), core side legs (12), upper yoke (2) and lower yoke (3) is covered with a ground shield.
8. The body structure of a converter transformer according to claim 5, wherein five main leg pulling plates are arranged on the periphery of each said core main leg (11), and three side leg pulling plates are arranged on the periphery of each said core side leg (12).
9. The body structure of a converter transformer according to claim 8, wherein a gap between adjacent ones of said main leg tie plates and a gap between adjacent ones of said side leg tie plates are each 3 mm.
10. The body structure of a converter transformer according to claim 5, wherein the top of said upper yoke (2) has a cross-sectional area larger than the cross-sectional area of the bottom of said upper yoke (2), and the top of said lower yoke (3) has a cross-sectional area smaller than the cross-sectional area of the bottom of said lower yoke (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111453221.0A CN114093609A (en) | 2021-12-01 | 2021-12-01 | Converter transformer's ware body structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111453221.0A CN114093609A (en) | 2021-12-01 | 2021-12-01 | Converter transformer's ware body structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114093609A true CN114093609A (en) | 2022-02-25 |
Family
ID=80306049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111453221.0A Pending CN114093609A (en) | 2021-12-01 | 2021-12-01 | Converter transformer's ware body structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114093609A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360828A (en) * | 2011-08-04 | 2012-02-22 | 保定天威集团有限公司 | 220kV-grade Vx connection traction transformer body structure |
| CN102436923A (en) * | 2011-12-13 | 2012-05-02 | 中国西电电气股份有限公司 | Disassembly transportation and on-site assembly method of transformer iron core |
| CN204946686U (en) * | 2015-09-28 | 2016-01-06 | 吴岳泽 | A kind of device body of oil-immersed power transformer |
| CN206363867U (en) * | 2017-01-20 | 2017-07-28 | 青岛特锐德电气股份有限公司 | Meet the transformer of the anti-accident short circuit of IEC standard |
| CN209312561U (en) * | 2018-12-17 | 2019-08-27 | 济南西门子变压器有限公司 | Coil supporting plate and power transformer |
| CN210865876U (en) * | 2019-12-24 | 2020-06-26 | 保定天威保变电气股份有限公司 | Reliable connection structure of iron core pulling plate and clamping piece of flexible direct transformer |
| CN211265250U (en) * | 2019-09-19 | 2020-08-14 | 特变电工衡阳变压器有限公司 | Series reactor iron core structure, reactor body, hollow series reactor and transformer |
| CN211719403U (en) * | 2020-04-07 | 2020-10-20 | 特变电工沈阳变压器集团有限公司 | +/-500 kV flexible direct current converter transformer with valve sleeve arranged outdoors |
-
2021
- 2021-12-01 CN CN202111453221.0A patent/CN114093609A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360828A (en) * | 2011-08-04 | 2012-02-22 | 保定天威集团有限公司 | 220kV-grade Vx connection traction transformer body structure |
| CN102436923A (en) * | 2011-12-13 | 2012-05-02 | 中国西电电气股份有限公司 | Disassembly transportation and on-site assembly method of transformer iron core |
| CN204946686U (en) * | 2015-09-28 | 2016-01-06 | 吴岳泽 | A kind of device body of oil-immersed power transformer |
| CN206363867U (en) * | 2017-01-20 | 2017-07-28 | 青岛特锐德电气股份有限公司 | Meet the transformer of the anti-accident short circuit of IEC standard |
| CN209312561U (en) * | 2018-12-17 | 2019-08-27 | 济南西门子变压器有限公司 | Coil supporting plate and power transformer |
| CN211265250U (en) * | 2019-09-19 | 2020-08-14 | 特变电工衡阳变压器有限公司 | Series reactor iron core structure, reactor body, hollow series reactor and transformer |
| CN210865876U (en) * | 2019-12-24 | 2020-06-26 | 保定天威保变电气股份有限公司 | Reliable connection structure of iron core pulling plate and clamping piece of flexible direct transformer |
| CN211719403U (en) * | 2020-04-07 | 2020-10-20 | 特变电工沈阳变压器集团有限公司 | +/-500 kV flexible direct current converter transformer with valve sleeve arranged outdoors |
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