CN113690036A - Three-winding high-voltage high-frequency transformer applied to energy router - Google Patents
Three-winding high-voltage high-frequency transformer applied to energy router Download PDFInfo
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- CN113690036A CN113690036A CN202110961897.4A CN202110961897A CN113690036A CN 113690036 A CN113690036 A CN 113690036A CN 202110961897 A CN202110961897 A CN 202110961897A CN 113690036 A CN113690036 A CN 113690036A
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- voltage
- winding
- frequency transformer
- energy router
- voltage winding
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- 238000004804 winding Methods 0.000 title claims abstract description 63
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000003822 epoxy resin Substances 0.000 claims abstract description 8
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000741 silica gel Substances 0.000 claims abstract description 7
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 7
- 239000004020 conductor Substances 0.000 claims abstract description 6
- 238000005266 casting Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 abstract description 7
- 238000005260 corrosion Methods 0.000 abstract description 7
- 230000017525 heat dissipation Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F30/00—Fixed transformers not covered by group H01F19/00
- H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
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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
- H01F27/085—Cooling by ambient air
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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
- H01F27/2876—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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/327—Encapsulating or impregnating
-
- 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
- H01F27/36—Electric or magnetic shields or screens
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulating Of Coils (AREA)
Abstract
The invention relates to the field of power systems, in particular to a three-winding high-voltage high-frequency transformer applied to an energy router. The high-voltage winding A, B and the low-voltage winding C of the high-frequency transformer are cast by epoxy resin, and an air channel is arranged between the formed cast body and the iron core, so that the heat dissipation of the iron core and the windings can be enhanced; the high-frequency transformer iron core is coated by the silica gel pad, and the vibration resistance and the corrosion resistance of the transformer are improved; the high-voltage winding A, B is coated by a semi-conductive material to form a shielding layer, so that the partial discharge value between the high-voltage winding A, B and the low-voltage winding C of the high-frequency transformer can be effectively reduced; the high-voltage winding A, B and the low-voltage winding C are integrally cast in vacuum by using epoxy resin, so that the protection performance of the windings is enhanced, and the voltage resistance of the transformer can be improved, thereby improving the safety and prolonging the service life of the energy router.
Description
Technical Field
The invention relates to the field of power systems, in particular to a three-winding high-voltage high-frequency transformer applied to an energy router
Background
With the rapid development of new technologies in the fields of smart grids, internet of things, power electronics, electromagnetic coupling and the like, an energy router usually adopts a modular cascade topology, when a module close to one end of a medium-voltage power grid is switched on by a power electronic switching device, a high-voltage side of a high-frequency transformer has high potential and needs good insulation performance with a low-voltage side, the volume of the energy router is mainly influenced by the power density of the high-voltage high-frequency transformer, the high-voltage high-frequency transformer and the high-voltage and low-voltage modules in the energy router in the current market are in equal relation, and the transformer has the defects of low power density, poor heat dissipation performance, poor corrosion resistance, low utilization rate of windings and iron cores, high overall cost and the like, therefore, a multi-winding high-voltage high-frequency transformer with high power density, good heat dissipation performance, strong corrosion resistance and low overall cost is urgently needed, and a plurality of modules share one transformer.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a three-winding high-voltage high-frequency transformer applied to an energy router, which has the advantages of good heat dissipation performance, strong corrosion resistance and low cost, and can greatly reduce the cost of the high-voltage high-frequency transformer and the cost of a low-voltage module in the energy router with the same power level.
In order to achieve the above object, the present invention provides a three-winding high voltage high frequency transformer applied to an energy router, comprising a high voltage winding A, B, a low voltage winding C, an iron core, and a silica gel pad, wherein:
the high-voltage winding A, B and the low-voltage winding C are both poured by epoxy resin, and the epoxy resin is used for improving the voltage-resistant level of the high-frequency transformer, so that the safety of the energy router is improved; meanwhile, an air channel is reserved between the common pouring body of the high-voltage winding A, B and the low-voltage winding C and the iron core, so that the heat dissipation performance of the high-frequency transformer is improved;
the high-voltage windings A, B are all coated and shielded by using a semi-conductive material to form a shielding layer for improving the partial discharge level of the high-frequency transformer, so that the service life of the transformer is prolonged;
the iron core is arranged in the silica gel pad, so that the iron core is protected from being broken in the transportation vibration process, the vibration resistance and the corrosion resistance of the transformer are improved, and the service life of the transformer is prolonged.
The invention has the beneficial effects that:
1. because the high-voltage winding A, B is coated by the semi-conductive material, the voltage resistance level and the partial discharge level of the high-frequency transformer are improved, and therefore the safety and the service life of the energy router are improved.
2. Because the high-voltage winding A, B and the low-voltage winding C are poured by epoxy resin, and the iron core is coated by the silica gel pad, the heat dissipation, vibration resistance and corrosion resistance of the high-frequency transformer are enhanced.
3. Because the three-winding transformer shares a pair of iron cores, the utilization rate of the iron cores is improved, and the cost of the high-voltage high-frequency transformer and the low-voltage module in the energy router with the same power level can be reduced.
4. The number of 1/2 transformers and the number of low voltage modules in the overall electrical topology of the energy router are reduced.
Drawings
Fig. 1 is a topological diagram of a three-winding high-voltage high-frequency transformer applied to an energy router and an energy router as a whole.
FIG. 2 is a series topology diagram of the AC/DC module and the DC/DC module of the three-winding high-voltage high-frequency transformer applied to the energy router.
Fig. 3 is a simplified schematic diagram of a three-winding transformer of a high-voltage high-frequency transformer applied to an energy router according to the present invention.
Fig. 4 is a schematic structural diagram of a three-winding high-voltage high-frequency transformer applied to an energy router.
Detailed Description
At present, an energy router usually adopts a modular cascade topology, so that a module close to one end of a medium-voltage power grid has high potential, when a power electronic switching device is conducted, the high-voltage side of a high-frequency transformer has high potential, so that the high-voltage side and the low-voltage side are required to have good insulation performance, the size of the energy router is mainly influenced by the power density of the high-voltage high-frequency transformer, and the high-voltage transformer with high voltage resistance, low partial discharge and high power density of a mature scheme of multiple windings does not exist at present.
Aiming at the problems, the invention provides a three-winding high-voltage high-frequency transformer applied to an energy router, which comprises high-voltage windings A and B, a low-voltage winding C and an iron core, wherein an air channel is reserved between a common casting body of the three windings and the iron core, the high-voltage windings A and B are coated by a semi-conductive material to form a shielding layer, and the high-voltage winding A, B and the low-voltage winding C are both vacuum-cast by epoxy resin.
Fig. 1 shows a common topology of an energy router, which has four stages of conversion, in which a medium-voltage power-frequency voltage is rectified by a first-stage AC/DC converter, then converted into a high-frequency square-wave voltage by a second-stage DC/AC converter, isolated and voltage-converted by an isolation high-frequency transformer in a third stage, and the fourth stage is AC/DC rectification conversion and outputs a DC voltage.
An energy router generally adopts a mode of module series connection and voltage division to improve the voltage withstanding level of equipment, fig. 2 is a topological diagram of two groups of AC/DC modules and DC/DC modules in series connection, and a module at one end close to a medium-voltage power grid has a high potential, so that when a power electronic switching device is switched on, the high-voltage side of a three-winding high-frequency transformer connected with the switching device also has the high potential, and when the three-winding high-frequency transformer is designed, high voltage withstanding and partial discharge control need to be considered, and the whole temperature rise, corrosion resistance and vibration resistance of the transformer need to be considered.
The invention simplifies and describes the three-winding high-voltage high-frequency transformer of the energy router, and as shown in fig. 3, the high-voltage high-frequency transformer is provided with a high-voltage winding A, a high-voltage winding B, a low-voltage winding C, an iron core and a silica gel pad, so that the cost of the transformer and the whole energy router can be saved.
According to the invention, the structure of the high-frequency transformer of the energy router is optimally designed, as shown in fig. 4, an air channel is reserved between the winding casting body and the iron core of the high-frequency transformer, and the heat dissipation of the iron core and the winding is enhanced under the action of an external fan. The two groups of high-voltage windings are coated by a semi-conductive material to form a shielding layer, so that the local discharge value between the high-voltage winding and the low-voltage winding of the high-frequency transformer can be effectively reduced. The high-voltage winding A, the high-voltage winding B and the low-voltage winding C are all cast in vacuum by using epoxy resin, so that the voltage resistance and partial discharge level of the high-frequency transformer can be greatly improved, the safety of the energy router is improved, and the service life of the energy router is prolonged.
In the above embodiment, a new topology of the energy router is adopted, and as other embodiments, the topology can also be applied to the topologies of other energy routers adopting a modular structure.
In the above embodiments, the three-winding high-frequency transformer of the present invention is applied to the field of energy routers, and as another embodiment, may be applied to the fields of ac/dc power distribution networks, power electronics, and power systems.
In the above embodiments, the transformer of the present invention is a high-frequency transformer, and as another embodiment, it can be applied to a medium-frequency transformer and a low-frequency transformer.
The specific embodiments are given above, but the present invention is not limited to the above-described embodiments. Variations, modifications, substitutions and variations of the embodiments may be made without departing from the principles of the invention and still fall within the scope of the invention.
Claims (3)
1. The utility model provides a be applied to three winding high voltage high frequency transformer of energy router which characterized in that contains high voltage winding A, B, low voltage winding C, iron core and silica gel pad, wherein:
the high-voltage winding A, B and the low-voltage winding C are poured by epoxy resin to form a pouring body;
an air channel is reserved between the iron core and the casting body.
2. The three-winding high-voltage high-frequency transformer applied to the energy router as claimed in claim 1, wherein the high-voltage winding A, B is wrapped and shielded by a semi-conductive material.
3. The three-winding high-voltage high-frequency transformer applied to the energy router as claimed in claim 1, wherein the iron core is mounted in a silica gel pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110961897.4A CN113690036A (en) | 2021-08-20 | 2021-08-20 | Three-winding high-voltage high-frequency transformer applied to energy router |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110961897.4A CN113690036A (en) | 2021-08-20 | 2021-08-20 | Three-winding high-voltage high-frequency transformer applied to energy router |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113690036A true CN113690036A (en) | 2021-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110961897.4A Pending CN113690036A (en) | 2021-08-20 | 2021-08-20 | Three-winding high-voltage high-frequency transformer applied to energy router |
Country Status (1)
| Country | Link |
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| CN (1) | CN113690036A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010182474A (en) * | 2009-02-04 | 2010-08-19 | Panasonic Corp | High-frequency heating device |
| CN203466032U (en) * | 2013-09-09 | 2014-03-05 | 南京大全变压器有限公司 | Winding structure of multi-winding transformer |
| CN110085399A (en) * | 2019-05-29 | 2019-08-02 | 江苏容天机电科技有限公司 | A kind of high-frequency and high-voltage plasma transformer |
| CN110323043A (en) * | 2019-07-17 | 2019-10-11 | 北京清盛电气科技研究院有限公司 | It is a kind of can seriation half encapsulating open type high voltage high frequency transformer structure |
| CN111599577A (en) * | 2020-04-26 | 2020-08-28 | 青岛鼎信通讯股份有限公司 | Multi-winding medium-voltage high-frequency transformer applied to power electronic transformer |
| CN212587333U (en) * | 2020-07-21 | 2021-02-23 | 山东电工电气集团智能电气有限公司 | Body structure of single-phase direct-buried dry-type transformer |
| CN112562994A (en) * | 2020-12-12 | 2021-03-26 | 青岛鼎信通讯股份有限公司 | Heat pipe heat dissipation high-voltage high-frequency transformer applied to energy router |
-
2021
- 2021-08-20 CN CN202110961897.4A patent/CN113690036A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010182474A (en) * | 2009-02-04 | 2010-08-19 | Panasonic Corp | High-frequency heating device |
| CN203466032U (en) * | 2013-09-09 | 2014-03-05 | 南京大全变压器有限公司 | Winding structure of multi-winding transformer |
| CN110085399A (en) * | 2019-05-29 | 2019-08-02 | 江苏容天机电科技有限公司 | A kind of high-frequency and high-voltage plasma transformer |
| CN110323043A (en) * | 2019-07-17 | 2019-10-11 | 北京清盛电气科技研究院有限公司 | It is a kind of can seriation half encapsulating open type high voltage high frequency transformer structure |
| CN111599577A (en) * | 2020-04-26 | 2020-08-28 | 青岛鼎信通讯股份有限公司 | Multi-winding medium-voltage high-frequency transformer applied to power electronic transformer |
| CN212587333U (en) * | 2020-07-21 | 2021-02-23 | 山东电工电气集团智能电气有限公司 | Body structure of single-phase direct-buried dry-type transformer |
| CN112562994A (en) * | 2020-12-12 | 2021-03-26 | 青岛鼎信通讯股份有限公司 | Heat pipe heat dissipation high-voltage high-frequency transformer applied to energy router |
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