CN1734914A - Self-balanced electronic power transformer - Google Patents
Self-balanced electronic power transformer Download PDFInfo
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- CN1734914A CN1734914A CN 200510019091 CN200510019091A CN1734914A CN 1734914 A CN1734914 A CN 1734914A CN 200510019091 CN200510019091 CN 200510019091 CN 200510019091 A CN200510019091 A CN 200510019091A CN 1734914 A CN1734914 A CN 1734914A
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Abstract
This invention discloses a self-balance electric power transformer, which comprises M one-N phase electric power transformer units formed by star arrangement or polygon; the power transformer is three-level structure of high-voltage level with P converter modules of cascade connection, isolating level of medium frequency or high frequency transformer, and low-voltage level of N independent AC/DC/AC converters. The invention can realize common functions and power dual-direction flow, ensures balance output whatever auxiliary side changes, and quick adjust ability for voltage and current, and has some control ability to current stream.
Description
Technical field
The present invention relates to a kind of power transmission and transformation device, relate to a kind of transformation device that is used for electric power system or rather.
Background technology
Electronic power transformer is a kind of transformation of electrical energy and transmission equipment that adopts the Technics of Power Electronic Conversion technology, is a kind of novel power transformer.Up to the present, the researcher has proposed multiple concrete implementation both at home and abroad.As: Holger Wrede, Volker Staudt, Andreas Steimel.Design of an Electronic Power Transformer.IEEE 2,002 28
ThAnnualConference of the IECON.Scott?D.Sudhoff，Steven?F.Glover，Dudley.Galloway.Application?of?Power?Electronics?to?the?DistributionTransformer.Applied?Power?Electronics?Conference?andExposition，2000。And patent of invention ZL 02139030.4.These implementations have advantage separately, but have a common deficiency: can be delivered to secondary side when promptly imbalance appears in the primary side system, influence the secondary side power supply.And the secondary side system occurs also can being delivered to primary side when uneven, influence primary side and powers.This situation is influential to the power system safety and stability operation, and is same also unfavorable to the operation of transformer itself.
Summary of the invention
The objective of the invention is to overcome above-mentioned weak point, a kind of self-balanced electronic power transformer is provided, and this transformer not only possesses the function of general electron electric power transformation, and can adapt to the requirement of uncompensated load, even under the uncompensated load situation, also can guarantee the primary side system balancing.And, in the time of can also imbalance occurring in the primary side system, guarantee the balanced feeding of secondary side system.
Self-balanced electronic power transformer provided by the invention, it is formed by connecting with star or polygon by M electronic power transformer unit, M 〉=1; The electronic power transformer unit is by hiigh pressure stage, the tertiary structure that isolation level and low-pressure stage constitute, hiigh pressure stage is formed by P converter module cascade, P 〉=1, low-pressure stage is a N independently AC/DC/AC converter, N 〉=1, isolation level are intermediate frequency or high frequency transformer, and its number of windings is that P, secondary winding number are N; A port of P converter module is together in series, constitute the interchange port of hiigh pressure stage, another port then links to each other with the first side winding of isolation level respectively, a port of each AC/DC/AC converter links to each other with the secondary side winding of isolation level, its another port forms a phase transformation N phase structure of electronic power transformer unit as an output mutually of electronic power transformer unit; The interchange port of M hiigh pressure stage couples together with star or polygon connection mode, forms the high pressure port of self-balanced electronic power transformer; The output-parallel of M low-pressure stage or be cascaded, the N that forms self-balanced electronic power transformer exports mutually, this N is exported mutually with star or polygon connection mode couple together, and forms the low-pressure port of self-balanced electronic power transformer.
The present invention is based on a phase transformation N phase electronic power transformer unit, by a M phase transformation N phase electronic power transformer unit coupled together realization with star, triangle or other polygon connection form.The present invention is used to realize the transformation of electrical energy between M phase system and the N phase system.When it realizes the M phase system when the N phase system transmits energy, each phase electric energy of former method, system, be modulated into high-frequency signal through hiigh pressure stage after, pass to isolation level, and be coupled to low-pressure stage, be assigned to the N phase, export after being transformed into required AC signal.Otherwise when realizing the N phase system when the M phase system transmits energy, every phase power distribution of former method, system is to the corresponding phase of M low-pressure stage, after being modulated into high-frequency signal, pass to isolation level separately, and be coupled to hiigh pressure stage, export after being transformed into the mutually required AC signal of M.Particularly, the present invention has following technique effect:
(1) can realize the basic functions such as isolation, transformation and transmission energy of conventional electric power transformer.
(2) can realize that power bi-directional flows, power both can flow from high side to low side, promptly used as step-down transformer, also can flow to the high-pressure side from low-pressure side, promptly used as step-up transformer.
(3) no matter which type of imbalance appears in secondary method, system, and former method, system can guarantee balance movement all the time.
(4) when imbalance appearred in former side's power supply, pair side still can guarantee balance output.
(5) can realize that M arrives the flexible transformation of N phase mutually.
(6) have voltage, Current Regulation function fast, can improve the quality of power supply.
(7) has certain trend control ability.
Description of drawings
Fig. 1 is the schematic diagram of a phase transformation N phase electronic power transformer unit.
Fig. 2 is the structural representation of a kind of embodiment of self-balanced electronic power transformer of the present invention.
Fig. 3 is the structural representation of the another kind of embodiment of self-balanced electronic power transformer of the present invention.
Embodiment
Below in conjunction with accompanying drawing and example the present invention is described in further detail.
As shown in Figure 1, electronic power transformer unit 1 is by hiigh pressure stage 2, a kind of tertiary structure that isolation level 3 and low-pressure stage 4 constitute.Hiigh pressure stage 2 is formed by P converter module 5 cascades, P 〉=1, and a port of this P converter module 5 is together in series, and constitutes the interchange port of hiigh pressure stage 2, and they another exchanges port and then links to each other with the first side winding of isolation level 3 respectively.Converter module 5 can be the AC/DC/AC converter, also can be the converter of AC/AC converter or other form.Low-pressure stage 4 is made of the individual independently AC/DC/AC converter 6 of N, N 〉=1, and a port of each AC/DC/AC converter 6 links to each other with the secondary side winding of isolation level 3, and then export mutually as one of electronic power transformer unit 1 its another port.Isolation level 3 is intermediate frequency or high frequency transformer (operating frequency is not less than 400Hz), the quantity of the quantity of its first side winding and the converter module 5 of hiigh pressure stage 2 consistent (being P), the quantity consistent (being that N is individual) of the quantity of its secondary side winding and the AC/DC/AC converter 6 of low-pressure stage 4.Therefore, electronic power transformer unit 1 is a phase transformation N phase structure.
As shown in Figure 2, the present invention is formed by connecting M 〉=1 by M electronic power transformer unit 1 by star or polygon (as triangle) bind mode.The interchange port of M hiigh pressure stage 2 couples together with star or polygon connection mode, forms the high pressure port of self-balanced electronic power transformer.The output-parallel of M low-pressure stage 4 together, the N that constitutes self-balanced electronic power transformer exports mutually, and couples together with star or polygon connection mode, forms the low-pressure port of self-balanced electronic power transformer.Therefore, self-balanced electronic power transformer is the transformation device of a M phase transformation N phase.
As shown in Figure 3, the output of M low-pressure stage 4 also can be cascaded, and the N that constitutes self-balanced electronic power transformer exports mutually, and couples together with star or polygon connection mode, forms the low-pressure port of self-balanced electronic power transformer.
According to above structure as can be seen, self-balanced electronic power transformer any is exported when having load mutually, all can be assigned to each phase of former side equably, thereby realizes balance automatically.On the other hand, as long as former side any has electricity mutually, can be in the output of the square one-tenth balance of pair, thus prevent that former method, system imbalance from having influence on secondary method, system.
The definite of the value of above-mentioned M, N, P mainly carries out according to following principle:
(1) choosing of M: by the form decision of high-pressure side power supply, as present the most common single-phase, two-phase, three-phase, four phases, six phases, ten two-phases, or the like.
(2) choosing of N: by the needed power supply form decision of low-pressure side load or system, as single-phase, two-phase, three-phase, four phases, six phases, ten two-phases, or the like.
(3) choosing of P: by the decision of the cooperation between the withstand voltage level of the operating voltage of designed self-balanced electronic power transformer and used device, as the 10kV system, if select the switching device of 3300V, will need 7 module cascades, promptly this moment, P was 7.
Below the present invention is specifically implemented for two examples.
Example 1:10kV/400V three-phase self-balance electronic power transformer
Electronic power transformer unit by three one phase transformation three-phases constitutes.Star connection, Y connection is adopted in the high-pressure side, and low-pressure side adopts the center outlet of star band to connect.The hiigh pressure stage of each phase transformation three-phase electronic power transformer unit is the cascade of 7 AC/DC/AC modules, and the device rated voltage is 3300V, and isolation level is 7 inputs, 3 output intermediate frequency transformers, and low-pressure stage is three groups of AC/DC/AC converters, and the device rated voltage is 1200V.The corresponding low-pressure stage of three one phase transformation three-phase electronic power transformer unit is connected in parallel, and constitutes the three-phase output of self-balanced electronic power transformer.
Example 2:10kV/220V three phase transformations one phase self-balanced electronic power transformer
Constitute by three single-phase electronic power transformer unit.Star connection, Y connection is adopted in the high-pressure side, the hiigh pressure stage of each single-phase electronic power transformer is the cascade of 7 AC/DC/AC modules, and the device rated voltage is 3300V, and isolation level is 7 inputs, 1 output intermediate frequency transformers, low-pressure stage is 1 group of AC/DC/AC converter, and the device rated voltage is 1200V.The output that constitutes self-balanced electronic power transformer in parallel of the low-pressure stage of three single-phase electronic power transformers.
Claims (1)
1, self-balanced electronic power transformer is characterized in that:
It is formed by connecting with star or polygon by M electronic power transformer unit (1), M 〉=1; Electronic power transformer unit (1) is by hiigh pressure stage (2), the tertiary structure that isolation level (3) and low-pressure stage (4) constitute, hiigh pressure stage (2) is formed by P converter module (5) cascade, P 〉=1, low-pressure stage (4) is a N independently AC/DC/AC converter (6), N 〉=1, isolation level (3) is intermediate frequency or high frequency transformer, its number of windings is that P, secondary winding number are N; A port of P converter module (5) is together in series, constitute the interchange port of hiigh pressure stage (2), another port then links to each other with the first side winding of isolation level (3) respectively, a port of each AC/DC/AC converter (6) links to each other with the secondary side winding of isolation level (3), its another port forms a phase transformation N phase structure of electronic power transformer unit (1) as an output mutually of electronic power transformer unit (1);
The interchange port of M hiigh pressure stage (2) couples together with star or polygon connection mode, forms the high pressure port of self-balanced electronic power transformer; The output-parallel of M low-pressure stage or be cascaded, the N that forms self-balanced electronic power transformer exports mutually, this N is exported mutually with star or polygon connection mode couple together, and forms the low-pressure port of self-balanced electronic power transformer.
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| CNB2005100190914A CN100405730C (en) | 2005-07-14 | 2005-07-14 | Self-balanced electronic power transformer |
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| CNB2005100190914A CN100405730C (en) | 2005-07-14 | 2005-07-14 | Self-balanced electronic power transformer |
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| CN1734914A true CN1734914A (en) | 2006-02-15 |
| CN100405730C CN100405730C (en) | 2008-07-23 |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101924476A (en) * | 2010-09-16 | 2010-12-22 | 上海交通大学 | Single-phase alternating current converter of intermediate alternating current voltage |
| CN101951164A (en) * | 2010-09-16 | 2011-01-19 | 上海交通大学 | Single-phase AC converter for intermediate DC voltages |
| CN101951163A (en) * | 2010-09-16 | 2011-01-19 | 上海交通大学 | Single-phase alternating current converter for alternating current link |
| CN101951165A (en) * | 2010-09-16 | 2011-01-19 | 上海交通大学 | Single-phase alternating current converter of direct current link |
| CN101951168A (en) * | 2010-09-16 | 2011-01-19 | 上海交通大学 | Alternating current (AC) converter for converting high voltage to low voltage |
| CN101951153A (en) * | 2010-09-16 | 2011-01-19 | 上海交通大学 | DC converter for converting high voltage to low voltage |
| CN102075096A (en) * | 2010-12-24 | 2011-05-25 | 东南大学 | Fault tolerance design-based high-power power electronic transformer |
| CN102163927A (en) * | 2011-04-20 | 2011-08-24 | 清华大学 | Multi-level converter employing multi-winding intermediate-high frequency transformer |
| CN102185496A (en) * | 2011-05-20 | 2011-09-14 | 上海交通大学 | AC-DC converter with bidirectional energy flow |
| CN101621254B (en) * | 2009-08-06 | 2012-05-23 | 东南大学 | Power electronic transformer applied to distribution network |
| CN102832815A (en) * | 2012-08-30 | 2012-12-19 | 西安交通大学 | Three-phase electric and electronic transformer based on multi-level multi-module cascade structure |
| CN103956911A (en) * | 2014-05-05 | 2014-07-30 | 国家电网公司 | Modularized H-bridge cascade multilevel mutual-balance power electronic transformer |
| CN104135164A (en) * | 2014-07-30 | 2014-11-05 | 中国东方电气集团有限公司 | Interleaved parallel multi-level electronic power transformer |
| CN104779814A (en) * | 2015-04-17 | 2015-07-15 | 西南交通大学 | Topological structure of vehicle-mounted power frequency-free electric and electronic transformer |
| CN104836424A (en) * | 2015-05-18 | 2015-08-12 | 国家电网公司 | Energy router with cascaded module voltage automatic balancing circuit |
| CN104935205A (en) * | 2014-03-20 | 2015-09-23 | 南车株洲电力机车研究所有限公司 | Transformer used for traction transmission system |
| CN105262141A (en) * | 2012-03-31 | 2016-01-20 | 中铁二院工程集团有限责任公司 | Electronic traction transformer for cophase power supply of traction power supply system for electrified railway |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101795080A (en) * | 2010-03-03 | 2010-08-04 | 中国科学院电工研究所 | Three-phase power electronics transformer for power distribution |
| CN102820666B (en) * | 2012-08-30 | 2015-01-07 | 西安交通大学 | Three-phase power electronic transformer capable of balancing asymmetric load |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1172428C (en) * | 2002-09-11 | 2004-10-20 | 华中科技大学 | Electric power electronic transformer |
-
2005
- 2005-07-14 CN CNB2005100190914A patent/CN100405730C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621254B (en) * | 2009-08-06 | 2012-05-23 | 东南大学 | Power electronic transformer applied to distribution network |
| CN101924476B (en) * | 2010-09-16 | 2012-11-07 | 上海交通大学 | Single-phase alternating current converter of intermediate alternating current voltage |
| CN101951153A (en) * | 2010-09-16 | 2011-01-19 | 上海交通大学 | DC converter for converting high voltage to low voltage |
| CN101951164B (en) * | 2010-09-16 | 2012-11-14 | 上海交通大学 | Single-phase AC converter for intermediate DC voltages |
| CN101951168B (en) * | 2010-09-16 | 2013-02-06 | 上海交通大学 | Alternating current (AC) converter for converting high voltage to low voltage |
| CN101951163A (en) * | 2010-09-16 | 2011-01-19 | 上海交通大学 | Single-phase alternating current converter for alternating current link |
| CN101951168A (en) * | 2010-09-16 | 2011-01-19 | 上海交通大学 | Alternating current (AC) converter for converting high voltage to low voltage |
| CN101951164A (en) * | 2010-09-16 | 2011-01-19 | 上海交通大学 | Single-phase AC converter for intermediate DC voltages |
| CN101924476A (en) * | 2010-09-16 | 2010-12-22 | 上海交通大学 | Single-phase alternating current converter of intermediate alternating current voltage |
| CN101951165A (en) * | 2010-09-16 | 2011-01-19 | 上海交通大学 | Single-phase alternating current converter of direct current link |
| CN102075096B (en) * | 2010-12-24 | 2013-09-25 | 东南大学 | Fault tolerance design-based high-power electronic transformer |
| CN102075096A (en) * | 2010-12-24 | 2011-05-25 | 东南大学 | Fault tolerance design-based high-power power electronic transformer |
| CN102163927A (en) * | 2011-04-20 | 2011-08-24 | 清华大学 | Multi-level converter employing multi-winding intermediate-high frequency transformer |
| CN102185496A (en) * | 2011-05-20 | 2011-09-14 | 上海交通大学 | AC-DC converter with bidirectional energy flow |
| CN105262141A (en) * | 2012-03-31 | 2016-01-20 | 中铁二院工程集团有限责任公司 | Electronic traction transformer for cophase power supply of traction power supply system for electrified railway |
| CN102832815A (en) * | 2012-08-30 | 2012-12-19 | 西安交通大学 | Three-phase electric and electronic transformer based on multi-level multi-module cascade structure |
| CN104935205A (en) * | 2014-03-20 | 2015-09-23 | 南车株洲电力机车研究所有限公司 | Transformer used for traction transmission system |
| CN104935205B (en) * | 2014-03-20 | 2018-07-24 | 南车株洲电力机车研究所有限公司 | Traction drive transformer |
| CN103956911A (en) * | 2014-05-05 | 2014-07-30 | 国家电网公司 | Modularized H-bridge cascade multilevel mutual-balance power electronic transformer |
| CN104135164A (en) * | 2014-07-30 | 2014-11-05 | 中国东方电气集团有限公司 | Interleaved parallel multi-level electronic power transformer |
| CN104779814A (en) * | 2015-04-17 | 2015-07-15 | 西南交通大学 | Topological structure of vehicle-mounted power frequency-free electric and electronic transformer |
| CN104836424A (en) * | 2015-05-18 | 2015-08-12 | 国家电网公司 | Energy router with cascaded module voltage automatic balancing circuit |
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| CN100405730C (en) | 2008-07-23 |
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