CN114070095A - Universal mixed distribution transformer - Google Patents
Universal mixed distribution transformer Download PDFInfo
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- CN114070095A CN114070095A CN202111375970.6A CN202111375970A CN114070095A CN 114070095 A CN114070095 A CN 114070095A CN 202111375970 A CN202111375970 A CN 202111375970A CN 114070095 A CN114070095 A CN 114070095A
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- 238000004804 winding Methods 0.000 claims abstract description 157
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 59
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 230000005291 magnetic effect Effects 0.000 claims abstract description 12
- 230000010354 integration Effects 0.000 claims abstract description 8
- 230000005389 magnetism Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000005674 electromagnetic induction Effects 0.000 description 3
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
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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
- H01F27/30—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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The invention relates to a universal hybrid distribution transformer, which comprises a main transformer and an auxiliary transformer bank, the auxiliary transformer set is arranged at the top end of the main transformer, the main transformer comprises three core limbs, the three iron core columns are respectively provided with a winding, the three iron core columns are longitudinally arranged, iron yokes are arranged among the three iron core columns to fix the three iron core columns, the auxiliary transformer group comprises 3 independent auxiliary transformers, each auxiliary transformer comprises an L-shaped iron core, an I-shaped iron core and windings wound on the iron cores, the design of partial windings of the transformer has universality, the windings can be flexibly connected and combined according to the actual converter structure and the electric energy control requirement and play different roles, and meanwhile, the magnetic integration of the converter inductor and the transformer winding is realized, so that the magnetic integrated hybrid distribution transformer with different structures is formed.
Description
Technical Field
The invention relates to electrical equipment, in particular to a hybrid distribution transformer capable of being freely combined according to requirements.
Background
In recent years, the intelligent upgrading and transformation process of a power distribution network is accelerated continuously, and although a traditional distribution transformer is simple in structure, reliable in operation and good in economical efficiency, the controllability of the traditional distribution transformer is poor and cannot adapt to the future development trend of the power distribution network, so that the research of a novel controllable distribution transformer gradually becomes a current research hotspot. Against this background, hybrid distribution transformers are being developed by the scientific workers at the ABB institute of Zielona G Lo, institute to Superior T nicho. The hybrid distribution transformer is a novel controllable distribution transformer which is realized by improving and designing a traditional distribution transformer and then connecting a fully-controlled power electronic device into the traditional distribution transformer. Compared with the traditional distribution transformer, the hybrid distribution transformer not only has the advantages of high efficiency and reliability of the traditional distribution transformer, but also can greatly improve the controllability of the traditional distribution transformer, so that the hybrid distribution transformer is very suitable for the development requirement of the intellectualization of the future distribution network.
In the prior art, chinese patent publication No. CN102308461A discloses a hybrid distribution transformer having both AC and DC power capabilities, the arrangement providing a hybrid distribution transformer comprising an electromagnetic transformer and an AC-AC converter having a DC bridge. The AC-AC converter is operable to maintain the input voltage and current of the hybrid transformer substantially in phase and to reduce output voltage fluctuations of the hybrid transformer in the event of an increase or decrease in the input voltage; chinese patent publication No. CN102334270A, discloses a hybrid distribution transformer with an integrated voltage source converter, the structure providing a hybrid distribution transformer comprising an electromagnetic transformer and a voltage source converter operable to reduce fluctuations in the output voltage of the hybrid distribution transformer in the event of an increase or decrease in the input voltage.
However, the above current research on hybrid distribution transformers is still incomplete, and the system includes a large number of discrete magnetic components, such as main transformers, series isolation transformers, converter output connection inductors, and so on. The volume of the iron core of the whole system is increased by the excessive discrete magnetic parts, so that the whole structure of the device is very complicated, great loss is caused, and a great amount of waste of ferromagnetic materials is caused.
Disclosure of Invention
The invention aims to provide a universal hybrid distribution transformer, which can be freely wired according to different requirements, so as to form magnetic integrated hybrid distribution transformers with different structures.
The invention is realized by adopting the following technical means: a general hybrid distribution transformer comprises a main transformer and an auxiliary transformer bank, wherein the auxiliary transformer bank is arranged at the top end of the main transformer, the main transformer comprises three core legs, windings are respectively arranged on the three core legs, the three core legs are longitudinally arranged, and iron yokes are arranged among the three core legs and are fixed;
the auxiliary transformer group comprises 3 independent auxiliary transformers, each auxiliary transformer comprises an L-shaped iron core, an I-shaped iron core and windings wound on the iron cores, the windings wound on the I-shaped iron cores comprise auxiliary transformer first multiplexing windings and auxiliary transformer second multiplexing windings, and the windings wound on the L-shaped iron cores are respectively auxiliary transformer first inductance windings and auxiliary transformer second inductance windings.
The L-shaped iron cores are 2, the two L-shaped iron cores are respectively arranged on two sides of the I-shaped iron core, and the first inductance winding of the auxiliary transformer and the second inductance winding of the auxiliary transformer are respectively arranged on the two L-shaped iron cores.
The three core legs of the main transformer are respectively wound with three-phase windings, and each phase winding comprises a first winding of the main transformer and a second winding of the main transformer.
The two groups of iron yokes are arranged at the upper end and the lower end of the iron core column respectively, and the main transformer and the auxiliary transformer group share the iron yokes at the upper end of the iron core column.
The first multiplexing winding of the main transformer and the first multiplexing winding of the auxiliary transformer are connected in series with an alternating current power supply, the second winding of the main transformer is connected with a load, the second multiplexing winding of the auxiliary transformer, the first inductance winding of the auxiliary transformer and the second inductance winding of the auxiliary transformer are connected in series to form an auxiliary winding, and then the auxiliary winding is connected with two output ends of the DC-AC converter to form the magnetic integrated hybrid distribution transformer with the leakage inductance of the transformer and the inductance of the converter.
The first winding of the main transformer is connected with an alternating current power supply, the first multiplexing winding of the auxiliary transformer, the first inductance winding of the auxiliary transformer and the second inductance winding of the auxiliary transformer are connected in series and then connected with two output ends of the DC-AC converter, and the second winding of the main transformer, the second multiplexing winding of the auxiliary transformer and the load are connected behind the second multiplexing winding of the main transformer, so that the hybrid distribution transformer with the transformer winding and the DC-AC converter integrated by electromagnetic induction is formed.
The first winding of the main transformer is connected with an alternating current power supply, the second winding of the main transformer is connected with the first inductance winding of the auxiliary transformer and the second inductance winding of the auxiliary transformer in series, and then is connected with a load after being connected with the DC-AC converter in series, so that the hybrid transformer with the integration of the transformer winding and the converter inductance and magnetism is formed.
The first winding of the main transformer and the first multiplexing winding of the auxiliary transformer are connected in series with an alternating current power supply, the second multiplexing winding of the auxiliary transformer and the second inductance winding of the auxiliary transformer are connected in series to form an auxiliary winding, then the auxiliary winding is connected with two input ends of an AC-DC converter, the second winding of the main transformer is connected in series with the first inductance winding of the auxiliary transformer, then the second winding of the main transformer and the first inductance winding of the auxiliary transformer are connected in series with a load with the DC-AC converter, and therefore the hybrid transformer with transformer windings and DC-AC converter electromagnetic induction integration is formed.
The invention has the advantages that the design of partial windings of the transformer has universality, the windings can be flexibly connected and combined according to the actual structure of the converter and the electric energy control requirement, different functions are realized, and simultaneously, the magnetic integration of the inductor of the converter and the windings of the transformer is realized, so that the magnetic integrated hybrid distribution transformer with different structures is formed, and the invention has wide application prospect.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic circuit diagram of the first embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of the second embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of the third embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of the 4 th embodiment of the present invention.
Wherein: 1 is a main transformer first winding, 2 is a main transformer second winding, 3 is an auxiliary transformer first multiplex winding, 4 is an auxiliary transformer second multiplex winding, 5 is an auxiliary transformer first inductance winding, 6 is an auxiliary transformer second inductance winding, 7 is a main transformer, and 8 is an auxiliary transformer bank.
Detailed Description
The invention is described in further detail below with reference to the drawings of the specification:
the invention relates to a hybrid distribution transformer, in particular to a magnetic integration hybrid distribution transformer capable of forming various different structures. As shown in fig. 1, the transformer comprises a main transformer 7 and an auxiliary transformer bank 8, wherein the auxiliary transformer bank 8 is arranged at the top end of the main transformer, the main transformer 7 comprises three core limbs, windings are respectively arranged on the three core limbs, the three core limbs are longitudinally arranged, and iron yokes are arranged among the three core limbs to fix the three core limbs;
the auxiliary transformer group 8 comprises 3 independent auxiliary transformers, each auxiliary transformer comprises an L-shaped iron core, an I-shaped iron core and windings wound on the iron cores, the windings wound on the I-shaped iron cores comprise auxiliary transformer first multiplexing windings 3 and auxiliary transformer second multiplexing windings 4, and the windings wound on the L-shaped iron cores are auxiliary transformer first inductance windings 5 and auxiliary transformer second inductance windings 6 respectively.
Specifically, the number of the L-shaped cores is 2, the two L-shaped cores are respectively arranged on two sides of the I-shaped core, and the first inductance winding 5 of the auxiliary transformer and the second inductance winding 6 of the auxiliary transformer are respectively arranged on the two L-shaped cores.
In the invention, three core legs of the main transformer are respectively wound with three-phase windings, and each phase winding comprises a main transformer first winding 1 and a main transformer second winding 2.
More specifically, the iron yokes are arranged in two groups, the two groups of iron yokes are respectively arranged at the upper end and the lower end of the iron leg, and the main transformer 7 and the auxiliary transformer group 8 share the iron yoke at the upper end of the iron leg.
In the present invention, the main transformer and the auxiliary transformer set can be freely combined with the related converters to form magnetic integrated hybrid distribution transformers with different kinds of structures to adapt to different equipment requirements, and the following description is provided by specific embodiments:
example 1:
referring to fig. 2, the primary winding 1 of the main transformer and the primary multiplexing winding 3 of the auxiliary transformer are connected in series to an alternating current power supply, the secondary winding 2 of the main transformer is connected with a load, the secondary multiplexing winding 4 of the auxiliary transformer and the primary inductance winding 5 of the auxiliary transformer and the secondary inductance winding 6 of the auxiliary transformer are connected in series to form an auxiliary winding, and then the auxiliary winding is connected with two output ends of the DC-AC converter to form a magnetically integrated hybrid distribution transformer with transformer leakage inductance and converter inductance, the auxiliary winding of the transformer is formed by three dispersed windings, so that the leakage inductance is large, and no additional series reactance is needed for the output of the converter.
Example 2:
referring to fig. 3, the first winding 1 of the main transformer is connected to an AC power supply, the first multiplexing winding 3 of the auxiliary transformer is connected in series with the first inductance winding 5 of the auxiliary transformer and the second inductance winding 6 of the auxiliary transformer, and then connected to two output terminals of the DC-AC converter, the second multiplexing winding of the main transformer, the second inductance winding of the auxiliary transformer and the load are connected to form a hybrid distribution transformer with integrated transformer windings and electromagnetic inductance of the DC-AC converter, and the first inductance winding 5 of the auxiliary transformer and the second inductance winding 6 of the auxiliary transformer of this type of transformer can be equivalent to inductance, so that no additional series filter inductance is needed for the output of the DC-AC converter.
Example 3:
referring to fig. 4, the main transformer first winding 1 is connected with an alternating current power supply, the main transformer second winding 2 is connected with the auxiliary transformer first inductance winding 5 and the auxiliary transformer second inductance winding 6 in series, and then is connected with a load after being connected with the DC-AC converter in series, so as to form a hybrid transformer with transformer winding and converter inductance magnetic integration, the function of the auxiliary transformer first inductance winding 5 and the auxiliary transformer second inductance winding 6 of the transformer of the type can be equivalent to inductance, and therefore, no additional series filter inductance is needed for the converter output.
Example 4:
referring to fig. 5, the primary transformer primary winding 1 and the secondary transformer primary winding 3 are connected in series to an AC power source, the secondary transformer secondary winding 4 and the secondary transformer secondary inductor winding 6 are connected in series to form an auxiliary winding, and then connected to two input terminals of an AC-DC converter, the primary transformer secondary winding 2 and the secondary transformer primary inductor winding 5 are connected in series, and then connected in series to a load, so as to form a hybrid transformer with a transformer winding and a DC-AC converter integrated by electromagnetic induction, the primary inductor winding 5 of the secondary transformer of this type of transformer can be equivalent to an inductor, and thus no additional series filter inductor is required for the output of the converter.
Claims (8)
1. The utility model provides a general hybrid distribution transformer, includes main transformer, auxiliary transformer group, main transformer include three core legs, set up the winding on three core legs respectively, three core legs longitudinal arrangement, set up the yoke between three core legs and fix it, its characterized in that: the auxiliary transformer bank is arranged at the top end of the main transformer,
the auxiliary transformer group comprises 3 independent auxiliary transformers, each auxiliary transformer comprises an L-shaped iron core, an I-shaped iron core and a winding wound on the iron core, each winding wound on the I-shaped iron core comprises an auxiliary transformer first multiplexing winding and an auxiliary transformer second multiplexing winding, and the windings wound on the L-shaped iron cores are respectively an auxiliary transformer first inductance winding and an auxiliary transformer second inductance winding; the inductance winding refers to a winding used for improving inductance value in the transformer, and the multiplexing winding refers to a multiplexing winding which can be used for improving inductance and converting voltage in the transformer.
2. A universal hybrid distribution transformer as recited in claim 1, wherein: the L-shaped iron cores are 2, the two L-shaped iron cores are respectively arranged on two sides of the I-shaped iron core, and the first inductance winding of the auxiliary transformer and the second inductance winding of the auxiliary transformer are respectively arranged on the two L-shaped iron cores.
3. A universal hybrid distribution transformer as recited in claim 1, wherein: the three core legs of the main transformer are respectively wound with three-phase windings, and each phase winding comprises a first winding of the main transformer and a second winding of the main transformer.
4. A universal hybrid distribution transformer as recited in claim 1, wherein: the two groups of iron yokes are arranged at the upper end and the lower end of the iron core column respectively, and the main transformer and the auxiliary transformer group share the iron yokes at the upper end of the iron core column.
5. A universal hybrid distribution transformer as recited in claim 1, wherein: the first winding of the main transformer and the first multiplexing winding of the auxiliary transformer are connected in series with an alternating current power supply, the second winding of the main transformer is connected with a load, the second multiplexing winding of the auxiliary transformer, the first inductance winding of the auxiliary transformer and the second inductance winding of the auxiliary transformer are connected in series to form an auxiliary winding, and then the auxiliary winding is connected with the two output ends of the DC-AC converter to form the magnetic integrated hybrid distribution transformer with the leakage inductance of the transformer and the inductance of the converter.
6. A universal hybrid distribution transformer as recited in claim 1, wherein: the first winding of the main transformer is connected with an alternating current power supply, the first multiplexing winding of the auxiliary transformer, the first inductance winding of the auxiliary transformer and the second inductance winding of the auxiliary transformer are connected in series and then connected with two output ends of the DC-AC converter, and the second winding of the main transformer, the second multiplexing winding of the auxiliary transformer and the rear connection load form the hybrid distribution transformer with the transformer winding and the DC-AC converter integrated by inductance and magnetism.
7. A universal hybrid distribution transformer as recited in claim 1, wherein: the first winding of the main transformer is connected with an alternating current power supply, the second winding of the main transformer, the first inductance winding of the auxiliary transformer and the second inductance winding of the auxiliary transformer are connected in series, and then the main transformer, the second winding of the auxiliary transformer and the first inductance winding of the auxiliary transformer are connected with a load after being connected with the DC-AC converter in series, so that the hybrid transformer with the integration of the transformer winding and the converter inductance and magnetism is formed.
8. A universal hybrid distribution transformer as recited in claim 1, wherein: the first winding of the main transformer and the first multiplexing winding of the auxiliary transformer are connected in series with an alternating current power supply, the second multiplexing winding of the auxiliary transformer and the second inductance winding of the auxiliary transformer are connected in series to form an auxiliary winding, and then are connected with two input ends of an AC-DC converter, the second winding of the main transformer and the first inductance winding of the auxiliary transformer are connected in series, and then are connected with a load in series with the DC-AC converter, so that the hybrid transformer with transformer windings and DC-AC converter electromagnetic integration is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111375970.6A CN114070095A (en) | 2021-11-19 | 2021-11-19 | Universal mixed distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111375970.6A CN114070095A (en) | 2021-11-19 | 2021-11-19 | Universal mixed distribution transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114070095A true CN114070095A (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111375970.6A Pending CN114070095A (en) | 2021-11-19 | 2021-11-19 | Universal mixed distribution transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114070095A (en) |
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2021
- 2021-11-19 CN CN202111375970.6A patent/CN114070095A/en active Pending
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