CN201167234Y - Wind power generation parallel-network system - Google Patents
Wind power generation parallel-network system Download PDFInfo
- Publication number
- CN201167234Y CN201167234Y CNU2008200789366U CN200820078936U CN201167234Y CN 201167234 Y CN201167234 Y CN 201167234Y CN U2008200789366 U CNU2008200789366 U CN U2008200789366U CN 200820078936 U CN200820078936 U CN 200820078936U CN 201167234 Y CN201167234 Y CN 201167234Y
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- direct current
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Abstract
The utility model provides a wind power generation interconnected system. The output of an aerogenerator is connected with a direct current interconnected converter and the output of the direct current interconnected converter is connected with a main grid through a field-level converter; the direct current output ends of all wind generating set direct current interconnected converters are connected in parallel in a wind power station to form a direct current grid inside the wind power station, the outputs of the direct current grid are uniformly connected with the field-level interconnected converter. The interconnected system is particularly suitable for high-power wind power generation and the situation in which long distance energy transmission is required on the basis of direct current interconnected technology, and can improve power transmission efficiency and effectiveness of the wind power station for long distance transmission because transmission loss of the direct current transmission is less than that of the alternate current transmission. A direct current interconnected system avoids the circumfluence problem between a plurality of converters in an alternate current interconnected system.
Description
Technical field
The utility model relates to wind energy conversion system electricity generation grid-connecting technical field, relates in particular to a kind of suitable high-power wind power generation and long apart from power transfer, and particularly offshore wind farm is fit to the wind power-generating grid-connected system of transmission.
Background technology
In recent years, Wind Power Utilization as regenerative resource has obtained in countries in the world paying attention to widely and developing, and along with the continuous rising of wind-driven generator and wind energy turbine set capacity, wind power plant is also more and more obvious to the influence of stable, the fail safe of AC network and the quality of power supply; In addition, because wind power plant is based upon the abundant remote districts of wind energy resources usually, the electric energy that is produced often need transmit at a distance, and therefore in order to improve the efficient of electric energy transmitting, electric pressure is generally higher.
Present wind generator system adopts and exchanges interconnection technology, and considers that from the reliability equal angles powerful wind generator system all adopts the interchange wind-driven generator.In wind generator system was incorporated into the power networks in interchange, according to the difference of energy process link, have again and directly be incorporated into the power networks and the branch that is incorporated into the power networks of unsteady flow: what is called directly was incorporated into the power networks, and the output energy that exchanges wind-driven generator is exactly directly sent into AC network without any processing; And in the unsteady flow grid-connected system, all or part of energy that exchanges the output of wind-driven generator then is by feed-in AC network again after the current transformer conversion process.In the unsteady flow grid-connected system, current transformer so the ginseng of finishing wind-driven generator output energy conversion processing are called as grid-connected converter.Exchange the characteristics of interconnection technology maximum, the energy that is exactly each wind turbine generator output all is to carry with the form feed-in AC network of alternating current.Obtained using widely though exchange interconnection technology, also had some defectives, mainly shown regulation of energy and Stability Control technical sophistication, and long Distance Transmission loss is bigger etc.
The utility model content
The utility model proposes a kind of suitable high-power wind power generation and long, the wind power-generating grid-connected system that control is simple more, stability is higher and loss is littler apart from power transfer.
Wind power-generating grid-connected system described in the utility model, the output of wind-driven generator connects the direct current grid-connected converter, and the output of direct current grid-connected converter connects the trunk electrical network through interlude level current transformer.
The dc output end of each wind turbine generator direct current grid-connected converter connects together in the wind power-generating grid-connected system described in the utility model, wind energy turbine set, constitutes the direct current network of wind energy turbine set inside, the unified level grid-connected converter that connects of the output of direct current network.
The alternating current of each wind turbine generator output is transformed into direct current through the direct current grid-connected converter in the wind power-generating grid-connected system described in the utility model, wind energy turbine set, transmits in the direct current mode by direct current network.The direct current energy that direct current network converges, unification is transformed to alternating current once more through field level current transformer, and feed-in exchanges the trunk electrical network.
Wind power-generating grid-connected system described in the utility model, based on the advantage of direct current interconnection technology at aspects such as the regulation and control of energy, stability, losses, be particularly suitable for high-power wind power generation and need grow occasion apart from power transfer, and particularly suitable with the offshore wind farm transmission therein.For long-distance transmissions,, can improve the power delivery efficient and the benefit of wind energy turbine set because the loss of direct current transportation is littler than ac transmission.Adopt the direct current grid-connected system, can make and form a kind of " electrical isolation " between each wind turbine generator: each exchanges the output frequency of wind-driven generator and can control arbitrarily according to requirements such as maximal power tracings, thereby guarantee that every unit all is operated in best running status, the circulation problem when having avoided again simultaneously exchanging interconnection technology between many current transformers.Adopt an energy process that the level grid-connected converter is concentrated, can reach purposes such as reducing equipment manufacturing cost according to the power grade of the scale choose reasonable field level grid-connected converter of wind energy turbine set.
Description of drawings
Fig. 1 is that wind power generation exchanges the grid-connected system schematic diagram in the prior art
Fig. 2 is a wind power generation direct current grid-connected system schematic diagram described in the utility model
The 1-wind-driven generator, the 2-wind turbine generator, 3-exchanges grid-connected converter, 4-direct current grid-connected converter, 5-field level current transformer
Embodiment
Wind power-generating grid-connected system described in the utility model, the output of the wind-driven generator 1 of each wind turbine generator 2 connects direct current grid-connected converter 4 separately respectively in the wind energy turbine set, the dc output end of all direct current grid-connected converters 4 connects together, constitute the direct current network of wind energy turbine set inside, described direct current network is provided with a level grid-connected converter 5 with outside exchanging between the trunk electrical network, the output of direct current network connects the trunk electrical network through field level current transformer 5.
The alternating current of each wind-driven generator 1 output is transformed into direct current through direct current grid-connected converter 4, and the feed-in direct current network transmits in the direct current mode by direct current network.The electric energy that direct current network converges, through the field level current transformer 5 unified alternating currents that are transformed to, feed-in exchanges the trunk electrical network.
Wind power-generating grid-connected system described in the utility model adopts the direct current grid-connected system, and be suitable for high-power wind power generation and need grow occasion apart from power transfer, and particularly suitable with the offshore wind farm transmission.For long-distance transmissions,, can improve the power delivery efficient and the benefit of wind energy turbine set because the loss of direct current transportation is littler than ac transmission.Adopt the direct current grid-connected system, can make and form a kind of " electrical isolation " between each wind turbine generator: each exchanges the output frequency of wind-driven generator and can control arbitrarily according to requirements such as maximal power tracings, thereby guarantee that every unit all is operated in best running status, the circulation problem when having avoided again simultaneously exchanging interconnection technology between many current transformers.And adopt an energy process that the level grid-connected converter is concentrated, can reach purposes such as reducing equipment manufacturing cost according to the power grade of the scale choose reasonable field level grid-connected converter of wind energy turbine set.
Claims (2)
1, wind power-generating grid-connected system is characterized in that, the output of wind-driven generator (1) connects direct current grid-connected converter (4), and the output of direct current grid-connected converter (4) connects the trunk electrical network through interlude level current transformer (5).
2, wind power-generating grid-connected system according to claim 1, it is characterized in that, the dc output end of the direct current grid-connected converter (4) of each wind turbine generator (2) connects together in the wind energy turbine set, constitute the direct current network of wind energy turbine set inside, the unified level grid-connected converter (5) that connects of the output of direct current network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200789366U CN201167234Y (en) | 2008-02-03 | 2008-02-03 | Wind power generation parallel-network system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200789366U CN201167234Y (en) | 2008-02-03 | 2008-02-03 | Wind power generation parallel-network system |
Publications (1)
| Publication Number | Publication Date |
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| CN201167234Y true CN201167234Y (en) | 2008-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNU2008200789366U Expired - Lifetime CN201167234Y (en) | 2008-02-03 | 2008-02-03 | Wind power generation parallel-network system |
Country Status (1)
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| CN (1) | CN201167234Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035218A (en) * | 2010-12-23 | 2011-04-27 | 东方电气集团东方汽轮机有限公司 | Power confluence method of multiple high altitude wind generating sets for intermittent power generation |
| WO2011079484A1 (en) * | 2009-12-30 | 2011-07-07 | 江苏省信息化研究中心 | Wind power supply method and system thereof |
| CN102457069A (en) * | 2010-10-22 | 2012-05-16 | 上海万德风力发电股份有限公司 | High protection level direct current grid-connected permanent magnet direct drive wind power system |
| CN102611142A (en) * | 2012-04-10 | 2012-07-25 | 深圳市合兴加能科技有限公司 | Power generator parallel operation system free of restraint of voltage value, frequency and phase difference and method |
| CN103368397A (en) * | 2013-07-16 | 2013-10-23 | 射阳伟龙电气有限公司 | Square wave distributed electricity transmission method |
-
2008
- 2008-02-03 CN CNU2008200789366U patent/CN201167234Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011079484A1 (en) * | 2009-12-30 | 2011-07-07 | 江苏省信息化研究中心 | Wind power supply method and system thereof |
| CN101741083B (en) * | 2009-12-30 | 2011-12-14 | 江苏省信息化研究中心 | Method for breaking through bottleneck of fast development of wind power and power supply system thereof |
| CN102457069A (en) * | 2010-10-22 | 2012-05-16 | 上海万德风力发电股份有限公司 | High protection level direct current grid-connected permanent magnet direct drive wind power system |
| CN102035218A (en) * | 2010-12-23 | 2011-04-27 | 东方电气集团东方汽轮机有限公司 | Power confluence method of multiple high altitude wind generating sets for intermittent power generation |
| CN102611142A (en) * | 2012-04-10 | 2012-07-25 | 深圳市合兴加能科技有限公司 | Power generator parallel operation system free of restraint of voltage value, frequency and phase difference and method |
| CN102611142B (en) * | 2012-04-10 | 2015-06-03 | 深圳市合兴加能科技有限公司 | Power generator parallel operation system free of restraint of voltage value, frequency and phase difference and method |
| CN103368397A (en) * | 2013-07-16 | 2013-10-23 | 射阳伟龙电气有限公司 | Square wave distributed electricity transmission method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 100081 Beijing city Haidian District Daliushu Fuhai international port 801 Patentee after: Beijing Nego Automation Technology Co., Ltd. Address before: 100089 Beijing city Haidian District North wa West Yee Jiayuan No. 18 - two storey commercial building Patentee before: Beijing Nego Automation Technology Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100081 Beijing city Haidian District Daliushu Fuhai international port 801 Patentee after: Beijing Nego Automation Technology Co., Ltd. Address before: 100081 Beijing city Haidian District Daliushu Fuhai international port 801 Patentee before: Beijing Nego Automation Technology Co., Ltd. |
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| DD01 | Delivery of document by public notice |
Addressee: Beijing Nego Automation Technology Co., Ltd. Liu Nana Document name: Notification of Passing Examination on Formalities |
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| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 100044 Beijing city Haidian District village on No. 3 six layer for building Patentee after: Beijing Nego Automation Technology Co., Ltd. Address before: 100081 Beijing city Haidian District Daliushu Fuhai international port 801 Patentee before: Beijing Nego Automation Technology Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20081217 |
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| CX01 | Expiry of patent term |