CN113565673A - Wind power generation system and method based on wind driven generator - Google Patents
Wind power generation system and method based on wind driven generator Download PDFInfo
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- CN113565673A CN113565673A CN202110921276.3A CN202110921276A CN113565673A CN 113565673 A CN113565673 A CN 113565673A CN 202110921276 A CN202110921276 A CN 202110921276A CN 113565673 A CN113565673 A CN 113565673A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/04—Automatic control; Regulation
- F03D7/042—Automatic control; Regulation by means of an electrical or electronic controller
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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
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Wind Motors (AREA)
Abstract
The invention relates to the field of wind power generation, in particular to a wind power generation system and method based on a wind driven generator. The system comprises an electric control circuit, a high-pressure head fan, an auxiliary airflow conveying pipeline and a plurality of auxiliary airflow nozzles; the auxiliary airflow nozzles are uniformly arranged in the middle and at the rear end of the pressure surface of the wind driven generator blade; the high-pressure head fan is arranged in the housing of the hub of the wind driven generator, the air inlet of the high-pressure head fan is communicated with the housing of the hub of the wind driven generator, and the air outlet of the high-pressure head fan is communicated with the auxiliary airflow nozzle through an auxiliary airflow conveying pipeline; the electric control circuit is connected to the cabin of the wind driven generator through a hollow wind driven generator shaft and is used for supplying power and controlling the high-pressure head fan; the auxiliary airflow nozzles arranged in the middle and at the rear end of the pressure surface of the blade of the wind driven generator are respectively arranged in a staggered mode, and the distance between each auxiliary airflow nozzle and the rotating shaft of the wind driven generator is different. The invention has simple structure, reasonable design, stable power output and strong adaptability, and can effectively improve the power generation power.
Description
Technical Field
The invention relates to the field of wind power generation, in particular to a wind power generation system and method based on a wind driven generator.
Background
Under the large background of carbon peak-to-peak carbon neutralization, the power generation ratio of new energy resources represented by wind power generation and photovoltaic power generation is getting larger and larger. The wind power generation means that the kinetic energy of wind is converted into electric energy, because the wind is one of pollution-free energy sources, is inexhaustible, and is very suitable for and can be used for generating electricity by utilizing wind power according to local conditions in coastal islands, grassland pasturing areas, mountain areas and plateau areas with water shortage, fuel shortage and inconvenient traffic. Meanwhile, wind energy is a clean and pollution-free renewable energy source, is very environment-friendly by utilizing wind power for power generation, and has huge wind energy content, so that the wind energy is increasingly paid attention by various countries in the world.
The wind power generator is a device for converting wind energy into electric energy, and generally comprises a wind wheel, a generator, a direction regulator, a tower, a speed-limiting safety mechanism and the like. The wind driven generator has a simple working principle, the wind wheel rotates under the action of wind force to convert the kinetic energy of the wind into mechanical energy of a wind wheel shaft, and the generator rotates under the drive of the wind wheel shaft to generate electricity. Under the large background of carbon peak-to-peak carbon neutralization, the proportion of the wind power generation to the total power generation capacity is increased more and more. However, wind power generation is greatly influenced by natural conditions, one wind turbine is in a shutdown state for about 30% of the year, is in a non-full-load operation state for 40% of the year, and is in a full-load power generation state for only 30% of the year. Therefore, reducing the wind generator's dependence on ambient wind speed is a future technology development trend.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a novel wind power generation system and method based on a wind driven generator, which have the advantages of simple structure, reasonable design, stable power output and strong adaptability and can effectively improve the power generation power.
The invention is realized by the following technical scheme:
a wind power generation system based on a wind driven generator comprises an electric control circuit, a high-pressure head fan, an auxiliary airflow conveying pipeline and a plurality of auxiliary airflow nozzles;
the auxiliary airflow nozzles are uniformly arranged in the middle and at the rear end of the pressure surface of the wind driven generator blade;
the high-pressure head fan is arranged in a housing of the hub of the wind driven generator, an air inlet of the high-pressure head fan is communicated with the housing of the hub of the wind driven generator, and an air outlet of the high-pressure head fan is communicated with an auxiliary airflow nozzle through an auxiliary airflow conveying pipeline;
the electric control circuit is connected to the cabin of the wind driven generator through a hollow wind driven generator shaft and used for supplying power and controlling the high-pressure head fan.
Furthermore, the auxiliary airflow nozzles arranged at the middle part and the rear end of the pressure surface of the blade of the wind driven generator are respectively arranged in a staggered mode, and the distance between each auxiliary airflow nozzle and the rotating shaft of the wind driven generator is different.
Furthermore, the input end of each auxiliary airflow nozzle is provided with a mass flow controller in one-to-one correspondence.
Furthermore, the mass flow controller is connected with an electric control circuit.
Furthermore, each auxiliary airflow nozzle is provided with an angle adjusting mechanism in one-to-one correspondence.
Furthermore, the angle adjusting mechanism is connected with an electric control circuit.
Further, the electric control circuit comprises a rotary electric control circuit and a non-rotary electric control circuit; the rotary electric control circuit is arranged in a housing of the hub of the wind driven generator and rotates along with the blades of the wind driven generator; the non-rotating electric control circuit is arranged in a cabin of the wind driven generator; the rotary electric control circuit passes through the hollow impeller shaft of the wind driven generator and is connected with the non-rotary electric control circuit through the slip ring.
Furthermore, an opening is formed in a housing of the hub of the wind driven generator and connected with an air inlet of the high-pressure head fan through a pipeline.
A wind power generation method based on a wind power generator comprises the following steps,
when the wind power generation load can not meet the power grid demand load, the high-pressure head fan is controlled by an electric control circuit to convey auxiliary airflow to each auxiliary airflow nozzle through an auxiliary airflow conveying pipeline to be sprayed out, so that the lift force of the blades of the wind driven generator is improved, and the power generation output of the wind driven generator is finally completed.
Further, in the above-mentioned case,
the flow of the auxiliary air flow of the corresponding auxiliary air flow nozzle is adjusted through a control mass flow controller of an electric control circuit;
the jet direction of the auxiliary air flow of the corresponding auxiliary air flow jet nozzle is adjusted through a control angle adjusting mechanism of an electric control circuit.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the system, the high-pressure head fan is arranged in the hub housing of the wind driven generator, and the auxiliary airflow conveying pipeline is arranged in combination, so that auxiliary airflow is provided for a plurality of auxiliary airflow nozzles arranged in the blades of the wind driven generator, the auxiliary airflow promotes the static pressure of the pressure surface of the blades of the wind driven generator, and the pressure difference between the upper surface and the lower surface of the blades of the wind driven generator is improved, so that the lift force of the blades of the wind driven generator can be effectively promoted, the power generation power is improved, and the adaptability of the wind driven generator to the environmental wind speed and the adaptability to the load requirement of a power grid are further improved; meanwhile, the high-pressure head fan is controlled by adopting an electric control circuit, so that the high-pressure head fan can be operated in time according to actual needs, and the high-pressure head fan is convenient, efficient, stable and reliable.
Furthermore, the distances between each auxiliary airflow nozzle arranged in the system and the rotating shaft of the wind driven generator are different, so that the auxiliary airflows sprayed out by the auxiliary airflow nozzles can be uniformly distributed without mutual interference, the lifting force is uniformly and integrally improved, and the stability of the output power is ensured.
Furthermore, the system provided by the invention adopts a mode of arranging an independent mass flow controller, so that each auxiliary airflow nozzle can be effectively ensured to perform independent flow regulation, the flow regulation is not interfered with each other, and the stability and the reliability of the whole system are further improved.
Furthermore, the system provided by the invention adopts a mode of arranging an independent angle adjusting mechanism, and can carry out independent angle adjustment according to each auxiliary airflow nozzle, so that the stability and reliability of the whole system are further improved.
Furthermore, the system is convenient, reliable, efficient and stable by connecting the mass flow controller and the angle adjusting mechanism with the electric control circuit.
Furthermore, the system of the invention adopts the mode that the hole is formed on the housing of the hub of the wind driven generator, and the air inlet of the high-pressure head fan is communicated with the hole, so that the air supply effect can be effectively ensured, and the stable auxiliary airflow can be generated by each auxiliary airflow nozzle.
Drawings
FIG. 1 is a schematic view of streamlines of airflow through a wind turbine blade.
Fig. 2 is a schematic structural diagram of the system according to the embodiment of the present invention.
Fig. 3 is a side view of the system in an embodiment of the invention.
Fig. 4 is a schematic view of the structure a in fig. 3.
FIG. 5 is a schematic view of a wind turbine blade in the system according to an embodiment of the present invention.
FIG. 6 is a static pressure distribution diagram of a blade surface of a conventional wind turbine.
FIG. 7 is a static pressure distribution diagram of the surface of a wind turbine blade after lifting force of compressed air in the system of the present invention.
In the figure: 1. the wind power generator comprises wind power generator blades, 2 parts of a wind power generator hub, 3 parts of an auxiliary airflow conveying pipeline, 4 parts of an auxiliary airflow nozzle, 5 parts of a high-pressure head fan, 6 parts of an opening, a front edge stagnation point, b, a rear edge and c, a stagnation streamline.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
The invention relates to a novel wind power generation system based on a wind driven generator, which comprises a plurality of auxiliary airflow nozzles 4 arranged in the middle and at the rear end of a pressure surface of a blade 1 of the wind driven generator, a high-pressure head fan 5 and an electric control circuit which are arranged in a housing of a hub 2 of the wind driven generator, an auxiliary airflow conveying pipeline 3 connected between the high-pressure head fan 5 and the auxiliary airflow nozzles 4, and a mass flow controller and an angle adjusting mechanism which are arranged on each auxiliary airflow nozzle 4, as shown in figures 2 and 3;
the electric control circuit is respectively connected with the high-pressure head fan 5, the mass flow controller and the angle adjusting mechanism;
an air inlet of the high-pressure head fan 5 is communicated with an opening 6 of a housing of the hub 2 of the wind driven generator, an air outlet of the high-pressure head fan is communicated with an inlet of the auxiliary airflow conveying pipeline 3, and power supply and control of the high-pressure head fan 5 are realized through an electric control circuit;
the mass flow controllers are arranged corresponding to the auxiliary airflow nozzles 4 one by one and are arranged at the input ends of the auxiliary airflow nozzles 4; the angle adjusting mechanism is arranged corresponding to each auxiliary airflow nozzle 4 one by one.
In practical application, as shown in fig. 4, the system of the present invention is different from a conventional wind driven generator in that a high pressure head fan 5 is arranged in a housing of a hub 2 of the wind driven generator, an opening 6 is arranged in the center of the housing of the hub 2 of the wind driven generator and is connected with an air inlet of the high pressure head fan 5, and air enters the high pressure head fan 5 through the opening 6 to be pressurized, enters an auxiliary airflow conveying pipeline 3 and is conveyed to auxiliary airflow nozzles 4 respectively located on blades 1 of the wind driven generator, so as to provide auxiliary airflow for the blades 1 of the wind driven generator and realize effective lift of the blades 1 of the wind driven generator;
as shown in fig. 5, an auxiliary air flow delivery duct 3 is arranged inside the wind turbine blade 1, and the auxiliary air flow nozzles 4 are located in the middle and at the rear end of the pressure surface of the wind turbine blade 1. Because the distance between each auxiliary airflow nozzle 4 and the rotating shaft of the wind driven generator is different, the circumferential linear velocity of each auxiliary airflow nozzle 4 is different and increases along with the increase of the rotating radius; each auxiliary airflow nozzle 4 is provided with an independent mass flow controller for controlling the flow of the auxiliary airflow, so that the wind driven generator blade 1 obtains the optimal lifting force lifting effect under the condition of low auxiliary airflow consumption; each auxiliary airflow nozzle 4 has an independent angle adjusting mechanism, for example, an angle adjusting mechanism combining a servo motor and a gear transmission mechanism is used for adjusting the jet direction of the airflow, so as to improve the static pressure of the pressure surface of the wind driven generator blade 1, so that the wind driven generator blade 1 obtains a large lift force and controls the axial thrust to the wind driven generator blade 1.
As shown in fig. 1, a stagnation streamline c formed on the wind turbine blade 1, which is a streamline when an air current flows through the wind turbine blade 1, is curved along the geometric shape of the wind turbine blade 1 due to the influence of the wind turbine blade 1 on the air current. The front end of the wind driven generator blade 1 is provided with a front edge dead center a, a streamline above the front edge dead center a flows through the upper surface and the rear edge b of the wind driven generator blade 1, the streamline below the front edge dead center a flows through the lower surface of the wind driven generator blade 1, because the upper surface of the wind driven generator blade 1 is raised, airflow flowing through the upper surface of the wind driven generator blade 1 is accelerated, pressure is reduced, airflow flowing through the lower surface of the wind driven generator blade 1 has small speed relative to the upper surface, the pressure is greater than the pressure on the upper surface of the wind driven generator blade 1, and the pressure difference between the upper surface and the lower surface of the wind driven generator blade 1 is the lifting force of the wind driven generator blade 1. On the wind driven generator, the lift force pushes the wind driven generator blades 1 to rotate around the impeller shaft to generate electricity.
The system is a wind power generation technology for improving the lift force of the blades 1 of the wind driven generator by using an aerodynamic method, can effectively ensure the improvement of the wind power generation power, and is integrally positioned in the housing of the hub 2 of the wind driven generator and the blades 1 of the wind driven generator, so that the whole system rotates along with the impeller in the working process; meanwhile, electric equipment such as a high-pressure head fan 5, an angle adjusting mechanism of an auxiliary airflow nozzle 4, a mass flow controller and the like in the system are connected with an electric control circuit; the electric control circuit comprises a rotary electric control circuit and a non-rotary electric control circuit; the rotary electric control circuit is arranged in a housing of the wind driven generator hub 2 and rotates along with the wind driven generator blades 1; the non-rotating electric control circuit is arranged in a cabin of the wind driven generator; the rotary electric control circuit rotates together with the wind driven generator hub 2 and the hollow wind driven generator impeller shaft, and the rotary electric control circuit penetrates through the hollow wind driven generator impeller shaft and then is connected with the slip ring, so that the connection with the non-rotary electric control circuit is realized, and power and control signals are transmitted. When the power grid demand load is larger than the wind power generation load (because the wind speed is low, the output of the wind driven generator is reduced), the auxiliary airflow is sprayed out through the nozzles arranged on the pressure surface of the wind wheel blade, the lift force of the blade is improved, and the power generation output of the wind driven generator is further improved.
In the simulation calculation, the static pressure distribution of the surface of the blade of the conventional wind driven generator is, as shown in fig. 6, the incoming flow wind speed (the sum of the wind speed and the rotating speed of the impeller) obtained by numerical simulation, and the static pressure distribution of the surface of the blade of the conventional wind driven generator; as shown in FIG. 7, the static pressure distribution on the surface of the blade of the wind driven generator after the compressed air lifts the lift force is numerically simulated, wherein the incoming wind speed is 30m/s, the auxiliary airflow is 10m/s, and the static pressure distribution on the surface of the blade 1 of the wind driven generator in the system is obtained. Because the auxiliary airflow promotes the lift force of the wind driven generator blade 1, the pressure difference of the upper surface and the lower surface of the wind driven generator blade 1 is promoted from 720Pa to 950Pa, and is promoted by 32%.
Based on any one of the systems, the invention also provides a novel wind power generation method based on the wind power generator, which comprises the following steps,
when the wind speed is low and the load required by the power grid is greater than the load generated by the wind power, the auxiliary airflow is conveyed to each auxiliary airflow nozzle 4 through the high-pressure head fan 5 and the auxiliary airflow conveying pipeline 3 under the control of the electric control circuit to be sprayed out, the lift force of the blades 1 of the wind driven generator is improved, and the power generation output of the wind driven generator is finally completed.
The flow of the auxiliary air flow of the corresponding auxiliary air flow nozzle 4 is adjusted by a control mass flow controller of an electric control circuit; the jet direction of the auxiliary air flow of the corresponding auxiliary air flow nozzle 4 is adjusted through a control angle adjusting mechanism of an electric control circuit.
The method can be also suitable for vertical axis wind driven generators, and is also suitable for wing type equipment such as aircraft blades and the like.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110921276.3A CN113565673A (en) | 2021-08-11 | 2021-08-11 | Wind power generation system and method based on wind driven generator |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040201220A1 (en) * | 2003-04-10 | 2004-10-14 | Advantek Llc | Advanced aerodynamic control system for a high output wind turbine |
| US20060140760A1 (en) * | 2004-12-23 | 2006-06-29 | Saddoughi Seyed G | Active flow modifications on wind turbine blades |
| US20100143122A1 (en) * | 2009-11-05 | 2010-06-10 | Jacob Johannes Nies | Active flow control system for wind turbine |
| US20110229322A1 (en) * | 2010-03-21 | 2011-09-22 | Saied Tadayon | Wind Turbine Blade System with Air Passageway |
| US20140301864A1 (en) * | 2011-11-23 | 2014-10-09 | Lm Wp Patent Holding A/S | Wind turbine blade |
| CN215333226U (en) * | 2021-08-11 | 2021-12-28 | 西安热工研究院有限公司 | A wind power generation system based on a wind turbine |
-
2021
- 2021-08-11 CN CN202110921276.3A patent/CN113565673A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040201220A1 (en) * | 2003-04-10 | 2004-10-14 | Advantek Llc | Advanced aerodynamic control system for a high output wind turbine |
| US20060140760A1 (en) * | 2004-12-23 | 2006-06-29 | Saddoughi Seyed G | Active flow modifications on wind turbine blades |
| US20100143122A1 (en) * | 2009-11-05 | 2010-06-10 | Jacob Johannes Nies | Active flow control system for wind turbine |
| US20110229322A1 (en) * | 2010-03-21 | 2011-09-22 | Saied Tadayon | Wind Turbine Blade System with Air Passageway |
| US20140301864A1 (en) * | 2011-11-23 | 2014-10-09 | Lm Wp Patent Holding A/S | Wind turbine blade |
| CN215333226U (en) * | 2021-08-11 | 2021-12-28 | 西安热工研究院有限公司 | A wind power generation system based on a wind turbine |
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