CN201260146Y - Hybrid wind generator set - Google Patents
Hybrid wind generator set Download PDFInfo
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- CN201260146Y CN201260146Y CNU2008201102407U CN200820110240U CN201260146Y CN 201260146 Y CN201260146 Y CN 201260146Y CN U2008201102407 U CNU2008201102407 U CN U2008201102407U CN 200820110240 U CN200820110240 U CN 200820110240U CN 201260146 Y CN201260146 Y CN 201260146Y
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Abstract
The utility model discloses a mixed type wind generating set, which comprises: a wheel hub; blades arranged on the wheel hub; a double-fed generator and a small power generator, wherein, a rotor of the double-fed generator is electrically connected with a frequency converter, and a stator of the double-fed generator is electrically connected with a power network directly; a stator of the small power generator is electrically connected with a frequency converter; opposite ends where the two frequency converters are connected with the double-fed generator and the small power generator are electrically connected with the power network independently and respectively; and the rotors of the double-fed generator and the small power generator are coaxially connected with each other and then are connected with the wheel hub by a gear case. Because the high-power double-fed generator and the small power generator (a permanent magnet synchronous generator or a squirrel-cage asynchronous generator) as well as the frequency converters adapted to the two generators are mixed for power generation, loads are reasonably distributed to each generator, the adjustable range of rotating speed of the blades is greatly broadened, the blades can maintain the optimum tip-speed ratio when low wind speed is rising to the rated wind speed, the wind power coefficient remains constant and optimum, and a transmission chain maintains high efficiency and has a certain redundancy function.
Description
Technical field
The utility model relates to technical field of wind power generation, refers to a kind of novel mixed type wind turbine generator especially.
Background technology
Whether adjustable existing wind turbine generator technology is according to generator speed, can be divided into two big classes: constant speed and transmission technology scheme.
1, the following wind turbine generator of MW class adopts the constant speed technical scheme mostly.
The wind turbine generator of constant speed technical scheme mainly comprises: blade, wheel hub, gear box and asynchronous generator.Wherein asynchronous generator can adopt the double speed asynchronous generator of pole-changing logarithmic form, to widen some ranges of speeds.
Owing to there is not the speed regulating device frequency converter, adopt the wind turbine generator of constant speed technical scheme, its generator speed excursion is less, and power coefficient is lower when hanging down wind speed.
2, the above wind turbine generator of MW class adopts the transmission technology scheme mostly.With respect to the Fixed Speed Wind Turbine Generator group, power coefficient has raising in various degree when hanging down wind speed.
Adopt the main flow wind generating technology scheme of transmission technology to be mainly following two kinds:
First kind of technical scheme often is called double-fed technical scheme, mainly comprises: blade, wheel hub, gear box, double-fed generator and frequency converter.
Second kind of technical scheme often is called the direct-driving type technical scheme, mainly comprises: blade, wheel hub, magneto alternator or outer excitation synchronous generator and frequency converter.
Wherein the main advantage of double-fed technical scheme is: cost is low, realizes that easily comprehensive price ratio is good.
Consider that for reducing frequency inverter capacity, cost and generating efficiency the range of speeds of double-fed generator generally has only the positive and negative 30% of synchronous speed in the double-fed technical scheme, thereby power coefficient reduces when causing low wind speed.
The main advantage of direct-driving type technical scheme is: saved gear box; For double-fed technical scheme, the range of speeds is wide slightly, and power coefficient improves to some extent when hanging down wind speed; Because adopt low-speed generator, the price of complete machine of direct-driving type wind power generation unit significantly rises with respect to the price of complete machine of double feed wind power generator group.
For the consideration that reduces the frequency converter cost, the pusher side frequency converter of direct-driving type technical scheme can take diode rectification to add booster circuit (boost circuit), so the synchronous generator rotating speed can not be too low, thereby power coefficient reduces when causing low wind speed.
The common feature of above technical scheme and some kinds of distortion thereof is:
1, adopts the single generator generating.
2, in the acceptable cost scope, be difficult to the operation of regulator generator under the utmost point slow-speed of revolution, power coefficient all can obviously reduce when hanging down wind speed.
3, because the restriction of the range of speeds, wind turbine generator can only keep constant the best of power coefficient under a certain wind speed section, for increasing the energy output of wind turbine generator under the low wind speed, the general high wind speed value of setting this wind speed section is lower than rated wind speed, therefore in the actual wind turbine generator, during than low wind speed with near rated wind speed, power coefficient is all lower.
4, during low speed because energy output is less, the efficient of driving-chain (containing gear box, generator and frequency converter) significantly reduces.
The utility model content
In view of this, the purpose of this utility model is to provide a kind of mixed type wind turbine generator, utilize this wind turbine generator during until rated wind speed, can realize that power coefficient keeps constant the best at low wind speed, driving-chain keeps high efficiency and has certain redundancy feature.
Mixed type wind turbine generator in the utility model comprises
Wheel hub;
Be installed on the described wheel hub rotating blades with the wind;
Double-fed generator, the rotor of described double-fed generator is electrically connected with frequency converter, and the stator of described double-fed generator directly is electrically connected with electrical network;
Small power generator, the stator of described small power generator is electrically connected with frequency converter;
The opposite end that described two frequency converters are connected with described double-fed generator, small power generator is independent respectively to be electrically connected with described electrical network;
Described double-fed generator is connected with the rotor coaxial of described small power generator after gear box is connected with described wheel hub.
Described two frequency converters include pusher side frequency converter that is electrically connected with described double-fed generator, small power generator and the net side frequency converter that is electrically connected with described electrical network.
The described frequency converter that described small power generator connects includes diode rectifier that is electrically connected with described small power generator and the net side frequency converter that is electrically connected with described electrical network.
The described net side frequency converter of described two frequency converters is dc bus connection altogether.
Described two frequency converters include same set of net side frequency converter.
Described double-fed generator and described small power generator are installed in the casing.
Described small power generator is magneto alternator or mouse cage asynchronous generator.
Adopt the beneficial effect that technique scheme obtained to be:
1, low wind speed is when rated wind speed, and blade keeps best tip speed ratio, and power coefficient keeps constant the best;
When 2, hanging down wind speed, though energy output is less, by switching to small power generator and corresponding little frequency converter, it is higher that driving-chain efficient still keeps.
3, the technical program also has certain redundancy feature: when a generator and the frequency converter that adapts thereof damaged, the frequency converter operation by dropping into another generator and adapting still can keep wind turbine generator to be in generating state.
4, low with respect to direct-driving type technical scheme cost.
5, realize that easily low-voltage passes through function.
Description of drawings
Fig. 1 is the composition schematic diagram of mixed type wind turbine generator.
Embodiment
The specific embodiment of the utility model is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, mixed type wind turbine generator of the present utility model include wheel hub 2, be installed on the wheel hub 2 rotating blades 1, double-fed generator 5, small power generator 8 with the wind, be electrically connected double-fed generator 5 frequency converter 11, be electrically connected the frequency converter 14 and the gear box 3 of small power generator 8.Small power generator 8 is magneto alternator or mouse cage asynchronous generator.
The rotor 7 of double-fed generator 5 is electrically connected with frequency converter 11, and the stator 6 of double-fed generator 5 directly inserts electrical network 17.The stator 9 of small power generator 8 is electrically connected with frequency converter 14.The opposite end that frequency converter 11,14 is connected with double-fed generator 5, small power generator 8 is independent respectively to be electrically connected with electrical network 17.The rotor 7 of double- fed generator 5 and 10 coaxial connections of the rotor of small power generator 8, the front and back position of the two connection is not limit, and double-fed generator 5 can be arranged in the casing with small power generator 8; Double-fed generator 5 and small power generator also are connected with high speed output shaft 4 one ends of gear box 3 after 8 coaxial connections.The input of gear box 3 is connected with wheel hub 2, and wheel hub 2 peripheries are laid rotating blades 1 with the wind.The complete structure of forming mixed type wind turbine generator of the present utility model thus.
When wind speed hour, by small power generator 8 generatings; When medium wind speed, by 5 generatings of high-power double-fed generator, this moment, small power generator 8 can withdraw from, and also can still keep generating state, thereby with high-power double-fed generator 5 reasonable distribution loads and keep synchronization; When wind speed during more greatly until rated wind speed, two generators move together and generate electricity; During greater than rated wind speed, come power-limiting by becoming oar.
Give each generator by the reasonable distribution load, greatly widened the adjustable extent of blade 1 rotating speed, thereby at low wind speed during until rated wind speed, blade 1 keeps best tip speed ratio, power coefficient keeps constant the best, driving-chain (comprising gear box 3, double-fed generator 5 and small power generator 8, frequency converter 11 and frequency converter 14) keeps high efficiency, and has certain redundancy feature.
The desirable wind turbine generator complete machine of small power generator 8 capacity capacity 1/8 to 1/2 preferable, the desirable wind turbine generator complete machine of double-fed generator 5 capacity capacity 1/2 to 7/8 preferable.
The control method of mixed type wind turbine generator of the present utility model is as follows:
1, when wind speed reaches the incision wind speed (1-2m/s), starts small power generator 8 (magneto alternator or mouse cage asynchronous generator).
2, when wind speed hour, move small power generator 8 always; The rotating speed of blade 1 changes with wind speed, keeps best tip speed ratio, obtains the maximal wind-energy usage factor.
3, when medium wind speed, the power double-fed generator 5 that has high input, this moment, small power generator 8 can be out of service; Also can still keep operating state, with high-power double-fed generator 5 reasonable distribution load and synchronous speeds; Blade 1 rotating speed changes with wind speed, keeps best tip speed ratio, obtains the maximal wind-energy usage factor.
4, when wind speed more greatly until rated wind speed, high-power double-fed generator 5 and small power generator 8 keep operating state simultaneously, the two synchronization and reasonable distribution load; Blade 1 rotating speed changes with wind speed, keeps best tip speed ratio, obtains the maximal wind-energy usage factor.
5, after wind speed surpasses rated wind speed, need make power keep constant by becoming oar, this moment, the rotating speed of blade 1 no longer increased.
The above is a preferred embodiment of the present utility model only, is not to be used for limiting to claim of the present utility model, and the equivalent structure that all utilization the utility model specifications and accompanying drawing content are done changes, and all in like manner is contained in the scope of the present utility model.
Claims (7)
1, a kind of mixed type wind turbine generator is characterized in that it comprises:
Wheel hub;
Be installed on the described wheel hub rotating blades with the wind;
Double-fed generator, the rotor of described double-fed generator is electrically connected with frequency converter, and the stator of described double-fed generator directly is electrically connected with electrical network;
Small power generator, the stator of described small power generator is electrically connected with frequency converter;
The opposite end that described two frequency converters are connected with described double-fed generator, small power generator is independent respectively to be electrically connected with described electrical network;
Described double-fed generator is connected with the rotor coaxial of described small power generator after gear box is connected with described wheel hub.
2, mixed type wind turbine generator according to claim 1 is characterized in that, described two frequency converters include pusher side frequency converter that is electrically connected with described double-fed generator, small power generator and the net side frequency converter that is electrically connected with described electrical network.
3, mixed type wind turbine generator according to claim 1, it is characterized in that the described frequency converter that described small power generator connects includes diode rectifier that is electrically connected with described small power generator and the net side frequency converter that is electrically connected with described electrical network.
According to claim 2 or 3 described mixed type wind turbine generator, it is characterized in that 4, the described net side frequency converter of described two frequency converters is dc bus connection altogether.
5, according to any described mixed type wind turbine generator in the claim 1 to 3, it is characterized in that described two frequency converters include same set of net side frequency converter.
6, mixed type wind turbine generator according to claim 1 is characterized in that, described double-fed generator and described small power generator are installed in the casing.
7, mixed type wind turbine generator according to claim 1 is characterized in that, described small power generator is magneto alternator or mouse cage asynchronous generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201102407U CN201260146Y (en) | 2008-08-27 | 2008-08-27 | Hybrid wind generator set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201102407U CN201260146Y (en) | 2008-08-27 | 2008-08-27 | Hybrid wind generator set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201260146Y true CN201260146Y (en) | 2009-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201102407U Expired - Lifetime CN201260146Y (en) | 2008-08-27 | 2008-08-27 | Hybrid wind generator set |
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| CN (1) | CN201260146Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958683A (en) * | 2010-08-09 | 2011-01-26 | 重庆科凯前卫风电设备有限责任公司 | Method for acquiring redundant stator voltage signal of double-fed wind turbine |
| CN101737266B (en) * | 2009-11-17 | 2012-05-09 | 沈阳华人风电科技有限公司 | Megawatt-level variable speed wind generating set featuring flexible combination of multiple electric generators and control method thereof |
| CN101626163B (en) * | 2009-08-04 | 2012-09-05 | 清华大学 | Hybrid wind power generation system |
| WO2012174684A1 (en) * | 2011-06-23 | 2012-12-27 | 国电联合动力技术有限公司 | Electric continuously variable large synchronous wind power generator set |
| CN112653309A (en) * | 2020-12-23 | 2021-04-13 | 华北电力大学 | Double-stator breeze generator based on relay characteristics |
-
2008
- 2008-08-27 CN CNU2008201102407U patent/CN201260146Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101626163B (en) * | 2009-08-04 | 2012-09-05 | 清华大学 | Hybrid wind power generation system |
| CN101737266B (en) * | 2009-11-17 | 2012-05-09 | 沈阳华人风电科技有限公司 | Megawatt-level variable speed wind generating set featuring flexible combination of multiple electric generators and control method thereof |
| CN101958683A (en) * | 2010-08-09 | 2011-01-26 | 重庆科凯前卫风电设备有限责任公司 | Method for acquiring redundant stator voltage signal of double-fed wind turbine |
| CN101958683B (en) * | 2010-08-09 | 2012-05-23 | 重庆科凯前卫风电设备有限责任公司 | Method for acquiring redundant stator voltage signal of double-fed wind turbine |
| WO2012174684A1 (en) * | 2011-06-23 | 2012-12-27 | 国电联合动力技术有限公司 | Electric continuously variable large synchronous wind power generator set |
| CN112653309A (en) * | 2020-12-23 | 2021-04-13 | 华北电力大学 | Double-stator breeze generator based on relay characteristics |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HUARUI WIND POWER TECHNOLOGY (GROUP) CO., LTD. Free format text: FORMER NAME: HUARUI WIND POWER TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 100872, 19 floor, building 59, Zhongguancun Avenue, Beijing, Haidian District Patentee after: Sinovel Polytron Technologies Inc. Address before: 100872, 19 floor, building 59, Zhongguancun Avenue, Beijing, Haidian District Patentee before: SINOVEL WIND Co.,Ltd. |
|
| CP03 | Change of name, title or address |
Address after: 100872, room 7, building 59, 705 Zhongguancun street, Haidian District, Beijing Patentee after: SINOVEL WIND GROUP Co.,Ltd. Address before: 100872, 19 floor, building 59, Zhongguancun Avenue, Beijing, Haidian District Patentee before: Sinovel Polytron Technologies Inc. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090617 |
|
| CX01 | Expiry of patent term |