CN102013695A - Grid-connected topology structure without transformer based on H-bridge used for wind power generation - Google Patents

Grid-connected topology structure without transformer based on H-bridge used for wind power generation Download PDF

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Publication number
CN102013695A
CN102013695A CN201010233705XA CN201010233705A CN102013695A CN 102013695 A CN102013695 A CN 102013695A CN 201010233705X A CN201010233705X A CN 201010233705XA CN 201010233705 A CN201010233705 A CN 201010233705A CN 102013695 A CN102013695 A CN 102013695A
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CN
China
Prior art keywords
voltage
grid
power
bridge
wind
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Pending
Application number
CN201010233705XA
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Chinese (zh)
Inventor
张跃平
胡涛
李太峰
魏西平
杨洋
赵淑玉
张坤
王振
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Rongxin Power Electronic Co Ltd
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Rongxin Power Electronic Co Ltd
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Priority to CN201010233705XA priority Critical patent/CN102013695A/en
Publication of CN102013695A publication Critical patent/CN102013695A/en
Priority to PCT/CN2011/077129 priority patent/WO2012010063A1/en
Pending legal-status Critical Current

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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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/49—Combination of the output voltage waveforms of a plurality of converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/28—The renewable source being wind energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/40—Synchronising a generator for connection to a network or to another generator
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/60—Planning or developing urban green infrastructure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects

Abstract

The present invention relates to a grid-connected topology structure based on H-bridge used for wind power generation without the transformer, which comprises wind generation set, rectification module and inversion module. The wind generating set generates low-voltage alternating current; obtaining the direct voltage through three-phase full-bridge rectification, wherein, said direct-current side voltage is used as direct voltage power supply of each unit in the inversion module; after converting the direct voltage to alternating voltage by the inversion module, directly connected in series with multiple power units and output through alternating current high voltage, then integrated to the power grid through buffer inductance. The grid-connected technology of aerogenerator is used to perform wind power generation grid based on the H-bridge without the transformer. The present invention contributes to the dispensing of the step-up transformer required during the general wind power generation grid, and the great saving of costs. Moreover, as outputting the high voltage through the connection in series with multiple power units, it is possible to output multi-level voltage waveform through modulation algorithm so as to reduce the content of output harmonic wave and the pollution to the power grid produced by wind power generation.

Description

Based on the wind power-generating grid-connected topological structure of the transless of H bridge
Technical field
The present invention relates to the wind-driven generator interconnection technology, particularly a kind of transformerless wind power-generating grid-connected based on the H bridge.
Background technology
As the new forms of energy of energy-conserving and environment-protective, the wind-powered electricity generation industry wins historic opportunity to develop, raises up against the market in the adverse environment that financial crisis is wreaked havoc, and growth momentum is swift and violent, and by the end of the end of the year 2009, whole nation accumulative total wind-powered electricity generation installed capacity reaches 25800 megawatts.
But in China's wind power plant, wind-driven generator all is by universal frequency converter basically, makes phase place own identical with electrical network.Be incorporated into the power networks with step-up transformer and electrical network more at last.So not only cause each wind-driven generator all to need a step-up transformer, cost is huge, and makes each wind-driven generator have only 3 level, and harmonic content is very big, and many electric network pollutions are serious.
In large-scale wind power field, a lot of motors is arranged, all need independent control for each wind-driven generator, the control difficulty is big, control loaded down with trivial detailsly, be difficult for to form concentrates wind power generation to control.
What wind power generation was exported all is two level or three level, and harmonic content is big, can not directly be connected to the grid after boosting, and need add the output filter.
Summary of the invention
The purpose of this invention is to provide the wind power-generating grid-connected topological structure of a kind of transless based on the H bridge, by the method for units in series, the output high pressure; Save general step-up transformer when wind power-generating grid-connected, saved great amount of cost.In addition,, can export the voltage with multiple levels waveform, reduce output harmonic wave content, reduce the pollution of wind power generation electrical network by modulation algorithm owing to adopt multiple unit series connection power cell output high pressure.
For achieving the above object, the present invention is achieved through the following technical solutions:
Based on the wind power-generating grid-connected topological structure of the transless of H bridge, comprise wind turbine generator, rectification module, inversion module, wind turbine generator produces low-voltage AC, obtain direct voltage after the three phase full bridge rectification, this direct voltage is as the dc voltage power supply of each unit in the inversion module; Inversion module is directly connected through a plurality of power cells after direct voltage is converted to alternating voltage, and ac high-voltage output is connected to the grid behind buffer inductance.
Described inversion module is become by three-phase sets of power cells, is whenever formed by n power unit cascade, and one of three-phase converter module terminates at together, and the other end inserts electrical network by inductance.
Described power cell inversion side is the H bridge construction, forms by four IGBT switching devices, and diode of each IGBT switching device inverse parallel, after per two IGBT switching devices are in series, in parallel with dc capacitor C again; The rectification side is uncontrollable full bridge structure.
Compared with prior art, the invention has the beneficial effects as follows:
1) input transless, and then wind-electricity integration topology volume is reduced, take up an area of and reduce, weight saving, cost reduces; Simultaneously can reduce transformer energy consumption, manufacturing process is oversimplified, the production cycle reduces.
2) wind-driven generator is directly connected to power cell rectification side, and wind-driven generator is not had specific (special) requirements, reduces motor cost;
3) modulator approach adopts the method for phase-shifting carrier wave, can produce the multi-ladder sine wave, obtains output voltage waveforms preferably with less switching frequency;
4) can be connected into ac high-voltage to whole wind power plant, directly export from AC side;
5) high-power, application prospect is extensive in many motors;
6) help many typhoons of centralized control power generator.
Description of drawings
Fig. 1 is based on the wind power-generating grid-connected topology diagram of transless of H bridge;
Fig. 2 is based on the power cell structure figure of the wind power-generating grid-connected topology of transless of H bridge.
Fig. 3 is current direction figure in the H bridge power unit.
Embodiment
See Fig. 1, based on the wind power-generating grid-connected topological structure of the transless of H bridge, comprise wind turbine generator, rectification module, inversion module, wind turbine generator M produces low-voltage AC, obtain direct voltage after the three phase full bridge rectification, this direct voltage is as the dc voltage power supply of each unit in the inversion module; Inversion module is directly connected through a plurality of power cells after direct voltage is converted to alternating voltage, and ac high-voltage output is connected to the grid behind buffer inductance.
Inversion module is become by three-phase sets of power cells, is whenever formed by n power unit cascade, altogether 3n power cell.Each power cell is given the power cell capacitances to supply power by a wind-driven generator M by the three phase full bridge rectification.One of three-phase converter module terminates at together, and the other end passes through inductance L A, L B, L CInsert electrical network.
See Fig. 2, power cell inversion side is H bridge construction, the uncontrollable full bridge structure of rectification side for being made up of diode D1, D2, D3, D4, D5, D6.The inversion side is made up of four switching device IGBT1, IGBT2, IGBT3, IGBT4 dc bus capacitor C, and switching device IGBT1 and IGBT2 are in series, and switching device IGBT3 and IGBT4 are in series, again with dc capacitor C parallel connection.And four switching device IGBT1, IGBT2, IGBT3, IGBT4 distinguish a reversal connection diode D11 in parallel, D22, D33, D44.Input, output that the common port of IGBT1 and IGBT2, IGBT3 and the common port of IGBT4 are connected with other power cell for this power cell.
This topological structure utilizes wind-powered electricity generation as energy relaying pond, gives power cell DC bus powered, in conjunction with certain modulator approach, produces the many level-variables sine wave that needs.Inversion module is mainly by three phase compositions, whenever formed by n power unit cascade.The number of series connection power cell is called unit progression, and one of three-phase converter module terminates to together, and the other end inserts electrical network by inductance.Owing to adopt many level outputs, the ac high-voltage of series connection power cell output contains harmonic wave still less, and is littler to electric network pollution, also do not need to adorn the LC filter.
The grid voltage of control IGBT makes its conducting or shutoff, can make the unit have different circuit states.
See Fig. 3-1, electric current flows to A through IGBT2, dc bus capacitor C, IGBT3 from B, or electric current flows to B through sustained diode 3, dc bus capacitor C, sustained diode 2 from A, adopts the power cell output level " 1 " of H bridge inverter main circuit this moment.
See Fig. 3-2, electric current flows to A through sustained diode 1, IGBT3 from B, or electric current flows to B through sustained diode 3, IGBT1 from A, adopts the power cell output level " 0 " of H bridge inverter main circuit this moment.
See Fig. 3-3, electric current flows to A through IGBT2, sustained diode 4 from B, or electric current flows to B through IGBT4, sustained diode 2 from A, adopts the power cell output level " 0 " of H bridge inverter main circuit this moment.
See Fig. 3-4, electric current flows to A through sustained diode 1, dc bus capacitor C, sustained diode 4 from B, or electric current flows to B through IGBT4, dc bus capacitor C, IGBT1 from A, adopts the power cell output level " 1 " of H bridge inverter main circuit this moment.
If power cell progression is selected suitably, power cell stack output voltage can reach the electrical network rank, will send voltage waveform with synchronized according to line voltage, and output harmonic wave meets the demands, and then can directly generate electricity by way of merging two or more grid systems.

Claims (3)

1. based on the wind power-generating grid-connected topological structure of the transless of H bridge, it is characterized in that, comprise wind turbine generator, rectification module, inversion module, wind turbine generator produces low-voltage AC, obtain direct voltage after the three phase full bridge rectification, this direct voltage is as the dc voltage power supply of each unit in the inversion module; Inversion module is directly connected through a plurality of power cells after direct voltage is converted to alternating voltage, and ac high-voltage output is connected to the grid behind buffer inductance.
2. the wind power-generating grid-connected topological structure of the transless based on the H bridge according to claim 1, it is characterized in that, described inversion module is become by three-phase sets of power cells, whenever, form by n power unit cascade, one of three-phase converter module terminates at together, and the other end inserts electrical network by inductance.
3. the wind power-generating grid-connected topological structure of the transless based on MMC according to claim 2, it is characterized in that, described power cell inversion side is the H bridge construction, form by four IGBT switching devices, diode of each IGBT switching device inverse parallel, after per two IGBT switching devices are in series, in parallel with dc capacitor C again; The rectification side is uncontrollable full bridge structure.
CN201010233705XA 2010-07-22 2010-07-22 Grid-connected topology structure without transformer based on H-bridge used for wind power generation Pending CN102013695A (en)

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PCT/CN2011/077129 WO2012010063A1 (en) 2010-07-22 2011-07-14 H-bridge based transformerless wind power grid-connected topological structure

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012010063A1 (en) * 2010-07-22 2012-01-26 荣信电力电子股份有限公司 H-bridge based transformerless wind power grid-connected topological structure
WO2014183570A1 (en) * 2013-05-15 2014-11-20 南京南瑞继保电气有限公司 Sub-module, protection unit, converter, and control method thereof
CN104333247A (en) * 2014-10-13 2015-02-04 华南理工大学 Cascaded multilevel single-phase inverter and cascaded multilevel three-phase inverter adopting novel three-terminal switching networks
CN106452098A (en) * 2016-09-09 2017-02-22 湖南大学 High-voltage and large-power wind power generation system and control method thereof
CN108011527A (en) * 2017-12-27 2018-05-08 北京金风科创风电设备有限公司 Converter, direct-drive wind generating set and power transmission system
US10862402B2 (en) 2018-01-02 2020-12-08 General Electric Company System and method for power converter including inverter, resonant circuit. and voltage multiplier
CN113270885A (en) * 2021-04-28 2021-08-17 广东电网有限责任公司阳江供电局 Offshore wind power direct current transmission system
CN114285070A (en) * 2021-11-17 2022-04-05 中国华能集团清洁能源技术研究院有限公司 Wind power generation collection system with serially connected fans

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US10199823B2 (en) * 2012-08-07 2019-02-05 Abb Schweiz Ag Chain-link converter system with different DC-sources and method for operation
CN114296345B (en) * 2021-12-14 2024-04-16 国网湖北省电力有限公司电力科学研究院 Electric energy multiport low-voltage alternating current hybrid H2/HinfOptimization control method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101291068A (en) * 2007-04-18 2008-10-22 上海御能动力科技有限公司 Driving system for wind power generation of parallel net type with generated power totally monitored
CN101345423A (en) * 2008-05-07 2009-01-14 中国科学院电工研究所 5-power level H-bridge cascade connection back-to-back current transformer used for wind power generation system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101465606A (en) * 2008-09-17 2009-06-24 刘建政 Parallel-in converter for directly-driving wind power generation system
CN102013695A (en) * 2010-07-22 2011-04-13 荣信电力电子股份有限公司 Grid-connected topology structure without transformer based on H-bridge used for wind power generation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101291068A (en) * 2007-04-18 2008-10-22 上海御能动力科技有限公司 Driving system for wind power generation of parallel net type with generated power totally monitored
CN101345423A (en) * 2008-05-07 2009-01-14 中国科学院电工研究所 5-power level H-bridge cascade connection back-to-back current transformer used for wind power generation system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
《Power and energy engineering conference,2009.APPEEC 2009.Asia-pacific》 20091231 Jianlin Li,Hongyan Xu Direct-Drive Wind Power Generator System Based on Interleaved Boost Converter 1-4 1-3 , *

Cited By (10)

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Publication number Priority date Publication date Assignee Title
WO2012010063A1 (en) * 2010-07-22 2012-01-26 荣信电力电子股份有限公司 H-bridge based transformerless wind power grid-connected topological structure
WO2014183570A1 (en) * 2013-05-15 2014-11-20 南京南瑞继保电气有限公司 Sub-module, protection unit, converter, and control method thereof
RU2674989C2 (en) * 2013-05-15 2018-12-14 Нр Электрик Ко., Лтд Submodule, protective unit, transducer and method of controlling transducer
CN104333247A (en) * 2014-10-13 2015-02-04 华南理工大学 Cascaded multilevel single-phase inverter and cascaded multilevel three-phase inverter adopting novel three-terminal switching networks
CN106452098A (en) * 2016-09-09 2017-02-22 湖南大学 High-voltage and large-power wind power generation system and control method thereof
CN106452098B (en) * 2016-09-09 2018-08-03 湖南大学 A kind of high-power wind generator system and its control method
CN108011527A (en) * 2017-12-27 2018-05-08 北京金风科创风电设备有限公司 Converter, direct-drive wind generating set and power transmission system
US10862402B2 (en) 2018-01-02 2020-12-08 General Electric Company System and method for power converter including inverter, resonant circuit. and voltage multiplier
CN113270885A (en) * 2021-04-28 2021-08-17 广东电网有限责任公司阳江供电局 Offshore wind power direct current transmission system
CN114285070A (en) * 2021-11-17 2022-04-05 中国华能集团清洁能源技术研究院有限公司 Wind power generation collection system with serially connected fans

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Application publication date: 20110413