CN102025164A - Automatic grid connection system for wind turbine asynchronous generator - Google Patents
Automatic grid connection system for wind turbine asynchronous generator Download PDFInfo
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- CN102025164A CN102025164A CN200910072886XA CN200910072886A CN102025164A CN 102025164 A CN102025164 A CN 102025164A CN 200910072886X A CN200910072886X A CN 200910072886XA CN 200910072886 A CN200910072886 A CN 200910072886A CN 102025164 A CN102025164 A CN 102025164A
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- generator
- electrical network
- wind
- wind speed
- speed
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- 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 invention discloses an automatic grid connection system for a wind turbine asynchronous generator, which belongs to the field of automatic control. When generating power, most large-size wind turbine generators are connected to a grid by converting (inversing) cyclic waves and voltage thereof into the cyclic waves and voltage of the grid, which not only increases the complexity coefficient of equipment and reduces the operating reliability of the equipment, but also increases equipment cost. However, an asynchronous generator can be connected to the grid conveniently, and that is accomplished automatically in the invention. The key point of the system lies in a controller part. The system controls the wind turbine generator to be connected to and separated from the grid automatically, clears the fault of the generator automatically and allows the wind turbine generator to separate from the grid and stop automatically in case of dangerous wind speed.
Description
Technical field
The invention belongs to automation field.
Background technology
The time mostly to be conversion (inversion) be the work of being incorporated into the power networks of the cycle of electrical network and voltage in the large-scale wind driven generator generating.Thereby this functional reliability that makes the equipment complexity coefficient increase and make equipment reduces, and has increased equipment cost simultaneously.Asynchronous generator can be incorporated into the power networks with electrical network easily, and native system solves this thing.
Summary of the invention
Wind asynchronous-generator is when wind-force is very little, and native system disconnects engine and electrical network, and generator is in the initialization state.When wind-force increased, the rotating speed of generator improved, and rotating speed surpasses " the rotating speed same period " when adding Δ 1, and the speed detector of native system sends instruction, made engine insert electrical network.Be equal to the asynchronous motor that is rotating this moment and insert electrical network, safely and steadily.After inserting electrical network, be higher than " the rotating speed same period " because report, so work in generating state.Supply with active energy to electrical network.At this moment, asynchronous generating is confidential absorbs reactive energy by electrical network.Native system is provided with the capacitor device of power factor auto-control, adjusts capacitor automatically and inserts or excise, and the power factor of system is met the requirements.When wind-force increased, generator constantly increased generation current, and during the electric current overrate, native system excises asynchronous generator from electrical network, and the rotor to generator brakes simultaneously.Simultaneously, the wind speed checkout gear of native system detects the super large wind speed, also can send same instruction, excision and brake.No matter these two is Who has been sent instruction, and after excision and the brake, system just enters the state of emergency, if the actual measurement wind speed meets or exceeds dangerous wind speed, sends Chinese People's Anti-Japanese Military and Political College's disaster caused by a windstorm alarm 1.When overcurrent and wind speed is little, if actual wind speed than the little Δ 2 of dangerous wind speed, excision (promptly the disconnection of wind motor and electrical network) and brake after, system sends fault warning 2, belongs to malfunction, has had only artificial treatment at this moment.In the state of emergency of Chinese People's Anti-Japanese Military and Political College's disaster caused by a windstorm, if strong wind is through with, after the wind speed checkout gear detects survival wind speed, sends brake and remove instruction, generator has entered the initialization state.When generator worked in generating state, when wind-force reduced, when the rotating speed of generator was lower than " the rotating speed same period ", generator entered electric motor state automatically, absorbed active energy by electrical network, and power factor is just becoming (the generating state power factor is into negative) simultaneously.Native system detects power factor and is just becoming, and wind-driven generator is disconnected from electrical network, enters the initialization state and awaits orders.
Description of drawings
Native system by 1, wind asynchronous-generator, 2, generator shaft speed detector, 9, generator inserts electrical network and disconnects master control set with electrical network, 10, the capacitor device of power factor auto-control, 3, generator shaft speed detector, 4, power factor checkout gear, 5, to the rotor brake gear of generator, 6, wind speed detection device, 7, alarm device, 8, malfunction device and 11, central controller (can with microprocessor, also the utilogic parts are finished) consist of.
Embodiment
As accompanying drawing.
Claims (2)
1. wind asynchronous-generator auto-parallel system is controlling wind asynchronous-generator, makes it insert electric power network automatically when generating, sends into institute's electricity to electrical network.Engine enters electric motor state when wind speed reduces, and at this moment absorbs electric energy to electrical network, and this moment, native system disconnected engine and electrical network automatically.The invention is characterized in use: center control device, generator insert electrical network and disconnect master control set, generator shaft speed detector with electrical network, the main circuit current checkout gear, the power factor checkout gear, the wind speed checkout gear is to the rotor brake gear of generator.
2. the center control device is characterized in that according to claim 1: after the generator shaft speed detector is sent rotary speed information here, analyze this information, when rotating speed surpasses " the rotating speed same period " when adding Δ 1, this device sends and inserts the electrical network instruction to " generator inserts electrical network and disconnects master control set with electrical network ", makes generator insert electrical network; When wind-force increased, generator constantly increased generation current, and during the electric current overrate, this device excises asynchronous generator from electrical network, sent the rotor brake instruction to engine simultaneously; Simultaneously, the wind speed checkout gear of native system detects the super large wind speed, and this device also can send same instruction, excision and brake.No matter these two is Who has been sent instruction, and after excision and the brake, system has just entered the state of emergency, if the actual measurement wind speed meets or exceeds dangerous wind speed, sends Chinese People's Anti-Japanese Military and Political College's disaster caused by a windstorm alarm 1; When overcurrent and wind speed is little, if actual wind speed than the little Δ 2 of dangerous wind speed, the excision and the brake after, system sends fault warning 2; In the state of emergency of Chinese People's Anti-Japanese Military and Political College's disaster caused by a windstorm,, after the wind speed checkout gear detects survival wind speed, send brake and remove instruction if strong wind is through with; When generator works in generating state, when wind-force reduces, when the rotating speed of generator is lower than " the rotating speed same period ", generator enters electric motor state automatically, absorbs active energy by electrical network, and power factor is just becoming simultaneously, native system detects power factor and is just becoming, need enter initialization state armed state, send and make wind-driven generator, even engine disconnects from electrical network from the electrical network open command.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910072886XA CN102025164A (en) | 2009-09-15 | 2009-09-15 | Automatic grid connection system for wind turbine asynchronous generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910072886XA CN102025164A (en) | 2009-09-15 | 2009-09-15 | Automatic grid connection system for wind turbine asynchronous generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102025164A true CN102025164A (en) | 2011-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910072886XA Pending CN102025164A (en) | 2009-09-15 | 2009-09-15 | Automatic grid connection system for wind turbine asynchronous generator |
Country Status (1)
| Country | Link |
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| CN (1) | CN102025164A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251852A (en) * | 2011-05-31 | 2011-11-23 | 蒙国宁 | Simply grid-connected small gas generating set |
| CN102522774A (en) * | 2011-12-18 | 2012-06-27 | 北京科诺伟业科技有限公司 | Dual-motor switching control method for wind generating set |
| US9989035B2 (en) | 2013-02-28 | 2018-06-05 | Utopus Insights, Inc. | Controlling wind turbine |
-
2009
- 2009-09-15 CN CN200910072886XA patent/CN102025164A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251852A (en) * | 2011-05-31 | 2011-11-23 | 蒙国宁 | Simply grid-connected small gas generating set |
| CN102522774A (en) * | 2011-12-18 | 2012-06-27 | 北京科诺伟业科技有限公司 | Dual-motor switching control method for wind generating set |
| US9989035B2 (en) | 2013-02-28 | 2018-06-05 | Utopus Insights, Inc. | Controlling wind turbine |
| US10415546B2 (en) | 2013-02-28 | 2019-09-17 | Utopus Insights, Inc. | Controlling wind turbine |
| US10968892B2 (en) | 2013-02-28 | 2021-04-06 | Utopus Insights, Inc. | Controlling wind turbine |
| US11835032B2 (en) | 2013-02-28 | 2023-12-05 | Utopus Insights, Inc. | Controlling wind turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110420 |