135results about How to "Improve wind energy utilization efficiency" patented technology

An electromechanical infinite variable speed wind generating device is capable of realizing the real variable speed constant frequency operation, remarkably improving the reliability and the operation efficiency of a system as well as the operating factor of the wind energy, remarkably promoting the working point and the operating efficiency of an electrical variable transmission as well as the efficiency of the whole system. The device includes a wind machine (1), a mechanical speed increaser(2), an electrical transmission (3), a generator (4), a first power inverter (5), a second power inverter (6) and a third power inverter (7). If a DC power consists of an energy storage unit (storage battery, capacitor, etc), partial power can be stored in a form of electricity, or the energy in the energy storage can be released into an output shaft. When the power of the wind machine is larger than that of the generator, the redundant energy can be converted into electricity and stored; on the contrary, when the power of the wind machine is smaller than that of the generator, the energy in the energy storage unit can be released to complement the insufficiency of the inputted power.

The invention discloses an internal model control method for a fixed pitch wind turbine, which belongs to wind power generation system control technology. The method compensates the disturbance of pneumatic torque by reconstructing an inverse formation internal model controller of a model, thereby ensuring the stability of a wind turbine when the wind turbine works above rated wind speed, namely works in a deep stall region. The variable speed control is performed on the fixed pitch wind turbine within the whole designed wind speed range, and the rotating speed of the wind turbine is adjusted by controlling the electromagnetic torque of a generator to achieve the aim of power control of the fixed pitch wind turbine; and the method improves the utilization efficiency of wind energy, overcomes the disadvantage that the fixed pitch wind turbine has poor output power characteristics above rated wind speed, solves the stability problem when the wind turbine operates in an unsteady torque area, and ensures that the wind turbine cannot run away or be shut off due to external disturbance.

The invention relates to the technical field of wind power generation equipment, in particular to a single-frame type impeller of a wind turbine. An existing horizontal-axis wind turbine affected by the structure and materials is low in wind utilization rate, high in design requirements, heavy and large, difficult to maintain and easy to overspeed and gallop. The single-frame type impeller of the wind turbine comprises a wind wheel frame, a vane adjusting device, a support and diagonal support rods, wherein the vane adjusting device is connected with the support and assembled at the front end of a turbine spindle, the wind wheel frame is connected with the support via the diagonal support rods, and vanes are assembled in the wind wheel frame and around the vane adjusting device via shafts, the vane adjusting device is provided with a closed adjusting chamber, and a gear type or connecting rod type adjusting mechanism is assembled in the adjusting chamber. By changing the vane connecting mode, the number of the vanes is increased, wind energy utilization efficiency is improved, output power of the wind turbine is increased, volume, height and weight of the wind turbine are reduced, and the single-frame type impeller is reasonable in structure and convenient for daily maintenance and overhauling.

The invention discloses an anti-icing wind power blade and a preparation method of the anti-icing wind power blade. The anti-icing wind power blade comprises a monitoring system, a peripheral power supply and a blade body provided with a macromolecule electrothermal film, wherein the macromolecule electrothermal film is arranged between the surface of a suction surface shell body and the surface of a pressure surface shell body of the anti-icing wind power blade or between shell body layers of the anti-icing wind power blade in a clamped mode, and the macromolecule electrothermal film is controlled by the monitoring system through a wire to be connected or disconnected with the peripheral power supply. At the time of operation, the monitoring system monitors icing parameters of an environment where the blade body is located, the peripheral power supply is connected when the icing parameters meet preset icing conditions, the macromolecule electrothermal film is powered on to emit heat, the heat is transmitted to the surface of the blade body, and the blade body is prevented from icing. According to the anti-icing wind power blade and the preparation method of the anti-icing wind power blade, the anti-icing wind power blade can be prevented from icing in an online mode under the condition of no machine halt, non-planned machine halts can be reduced, and wind energy utilization efficiency of a wind machine in frigid weather is improved. The anti-icing wind power blade is simple in preparation technology, high in operability, and free from extra complex processes and devices. The preparation method can be used for preparing a large anti-icing wind power blade. The anti-icing wind power blade and the preparation method of the anti-icing wind power blade are beneficial to popularization and implementation.

The invention discloses a wind generator system which comprises a tower, a generator assembly which is arranged on the tower, a transmission shaft which is connected with the generator assembly, and multi-stage wind wheels which are movably arranged and spaced along the axial direction of the transmission shaft. The multi-stage wind wheels with small blades are arranged on the same shaft to replace a single wind wheel with huge blades, thus overcoming various disadvantages which are caused by huge blades of the existing huge wind generator, enhancing wind energy utilization efficiency, and universality and economical efficiency of the application of the wind electric power generation. In addition, for the generators with the same power, decrease of diameter of the wind wheels causes corresponding increase of rotation speed of the wind wheels so that transmission ratio of a gear box is reduced, manufacturing and installation cost of the gear box is reduced, which can further enhance economical efficiency of the generator system. The system has the advantages of low cost, high wind energy utilization ratio, convenient and easy manufacture, installation and maintenance, wide application field range, and can greatly reduce the diameter and whole size of the wind wheels of the existing big and small wind generators to facilitate transportation.

The invention provides a wind power generation system, relating to the wind power generation technology, which can be used in a commercial wind power generation system with a large horizontal shaft rotor. The wind power generation system comprises dual rotors; shafts of the dual rotors are respectively fixedly connected with a big vane and a small vane which are positioned on two axial ends of a generator respectively; and a rod-shaped support girder has an upper end connected with the root part of the rotating shaft of the big vane close to an engine room through an interconnecting piece in a rotatable connection and a lower end fixedly connected with the movable part of the upper part of a tower scaffold through a fixing component. The wind power generation system has the advantages of high wind power utilization efficiency, good system security and improvement of starting and low wind speed performance, and accords with developing tendency of large size of modern wind turbines.

A vertical wind power generator comprises a tower column (1), at least one generator unit (2), at least two blades (3), an excitation control device (16), a rotation rectifying device (161), a bidirectional frequency converter (15), flanges (7-13), bearings (4-6), a cooling system, a crane (80) and a lift system. The generator unit (2) comprises a bracket (201), a generator (202) and an exciter (203). The bracket (201) comprises an outer bracket (2011) and an inner bracket (2012). The generator (202) comprises a stator (2021) and a rotor (2022). The exciter (203) comprises a stator (2031) and a rotor (2032). The vertical wind power generator can be manufactured at reduced cost, be rapidly started, improve the utilization efficiency of wind power, have a better cooling effect on the generator (202) and increase its operating life, and therefore reduce maintenance cost and time.

The invention relates to a multiphase wind power plant micro site selection method. Fine adjustment is performed on an optimal blower position in a movable grid neighborhood through regional gridding based on a genetic algorithm with extremely high global search capacity by adding tabu search in the genetic algorithm so that the algorithm is enabled to have great stability and capacity of overcoming premature in the optimization process, a defect of insufficiency of local search capacity of the genetic algorithm is compensated, whole algorithm performance is enhanced, and optimized distribution of irregular shapes of wind power plants can be effectively processed. Compared with conventional fractional optimization of multiphase wind power plants, wake flow influence between wind power plants of different phases is considered in the optimization process so that power generation efficiency of a wind turbine can be enhanced, and long term of optimal benefit of the wind power plants can be pursued. The method can be extended to the solution of similar problems, and research results are beneficial for enhancement of wind energy utilization efficiency and economic benefit of the wind power plants so that the method has high practicality.

The invention provides a super-hydrophobic self-cleaning surface of a wind power vane and a preparation method, and belongs to the technical field of wind power equipment manufacturing. A resin coating on the surface of the wind power vane is densely covered with columnar micron-sized structures, the outer surface of each columnar micron-sized structure is coated with a large amount of nano particles, and thus micro-nano secondary structures are formed; the preparation method of the super-hydrophobic self-cleaning surface of the wind power vane comprises the steps that the columnar micron-sized structures are prepared through ablation on the resin coating on the vane surface by directly utilizing pulse lasers, the nano particles are generated through induction on the outer surface of eachcolumnar micro-sized structure simultaneously based on the inductive effect of the pulse lasers, and thus the micro-nano secondary structures which combine the micron-sized structures with the nano structures are formed. The preparation method is simple, good in technological compatibility and high in designability, and can be prepared in large areas. The super-hydrophobic self-cleaning wind powervane can effectively lower the pollution caused by weathered of the vane, the possibility of freezing is lowered, the average annual working time of a wind turbine generator and the wind energy utilization efficiency are improved, the service life of the vane is prolonged, and therefore the super-hydrophobic self-cleaning wind power vane has important application prospects.

The invention discloses a control method of a wind collecting-type vertical-shaft fan and a wind generating set thereof. The method is characterized in that the inflow wind speed, the relative wind speed, the attack angle of blades and the driving force of wind wheels are controlled by adjusting the position angle of a wind collecting system of the wind collecting-type vertical-shaft fan, thus being capable of controlling wind energy efficiency and fan power; a wind collecting-type vertical-shaft wind-driven generator mainly consists of a main shaft, a wind wheel, a tower post, bearings, a pedestal, a gear box, a generator and the wind collecting system, wherein the wind collecting system mainly consists of a wind guiding wing, a wind collecting wing and a driving and controlling component; and the purpose of controlling the wind energy efficiency and the fan power is achieved by adjusting and controlling azimuth angels of the wind guiding wing and the wind collecting wing.

A wind turbine includes a nacelle that houses a dynamo and a vane wheel coupled to an end of the dynamo. The nacelle is movably mounted to a post. The nacelle has a body forming a circumferentially extending curved slot that has a front portion forming a reducing section and a rear portion forming an expanding section. The vane wheel has a hub at a center thereof and including a plurality of blades radially extending therefrom. Each blade has an end forming a down wash. With the curved design of the nacelle body, the rising angle of airflow exiting the nacelle is improved and with the down wash, the occurrence of tip vortex is suppressed, whereby the utilization efficiency of wind energy in the wind generation operations is improved.

The invention discloses a flexible and retractable auxiliary blade mechanism of a vertical-axis wind turbine and belongs to wind turbines. According to the flexible and retractable auxiliary blade mechanism of the vertical-axis wind turbine, an auxiliary blade is assembled on an upper beam and a lower beam of the vertical-axis wind turbine and located between a main blade and a main shaft, a flexible auxiliary blade provided with a rigid balance weight bar is connected to the auxiliary blade through a coiling block, a dead bolt, a torsion spring, a bearing sleeve, a bearing and a fixed shaft are assembled in the coiling block, the fixed shaft is fixedly installed on the upper beam and the lower beam, a reel and a planar volute spiral spring are assembled on the upper beam and the lower beam, the two ends of a stay cord are connected to the rigid balance weight bar and the reel, and then the flexible and retractable auxiliary blade mechanism is formed. The flexible and retractable auxiliary blade mechanism is novel in structural design, scientific and reasonable in utilization of wind energy, high in adaptability, reliable in use and high in automation degree.

The invention discloses a PSO (Particle Swarm Optimization)-based maximum wind energy capturing method of a VSVF (Variable-speed Variable-frequency) wind power system. Aiming at the VSVF wind power system which is formed by a variable-frequency transformer and multiple parallel-running permanent magnetic synchronous wind power generation units, cooperative optimization can be carried out on the rotating speed of the variable-frequency transformer and the pitch angles of all permanent magnetic synchronous wind power generation units through PSO, so that the capturing of maximum wind energy of the VSVF wind power system is realized. Compared with a univariate optimization method aiming at the rotating speed of the variable-frequency transformer, a PSO-based multivariate optimization method provided by the invention is capable of obtaining more wind energy.

The present invention discloses a rotor of wind energy conversion system (WECS) with the Venturi-tube effect. All the blades mounted on the blade-mounting seat envelop together to form a revolving-body cage turbine, which can be divided from structure into a head portion at the windward end, a tail portion at the wind exhaust end, and an airstream compression portion between the head portion and the tail portion and constituted by the enveloping blades. The revolution diameter of the airstream compression portion is gradually substantially increased from the head portion to the tail portion. The cage turbine forms a dynamic Venturi tube during the revolving process, with which the blade revolves to constitute its outline tube wall with the air permeability. The airstream passes through a window between the blades, and the incoming wind does work towards the blade during the process of permeating from the external space to the internal space of this outline tube wall, thus realizing the energy transfer.

The invention discloses an off-grid economical vertical axis wind turbine. The off-grid economical vertical axis wind turbine is characterized in that: the off-grid economical vertical axis wind turbine comprises a spherical wind rotor, pendulum units, a clutch and a drum brake, the upper end of the clutch is connected with the spherical wind rotor, the lower end of the clutch is connected with the drum brake, the pendulum units are respectively arranged on the left and the right sides of the clutch, unloading valves are arranged on the spherical wind rotor, the output shaft of the clutch is connected with a generator, and a positioning mechanism is arranged to connect with the clutch. The off-grid economical vertical axis wind turbine has the advantages of compact structure, low cost, small size, high wind energy utilization rate, low vibration noise, attractive appearance and high economic benefit.

The invention discloses a blade-collapsible, oil resistance-regulated and controlled vertical-spindle wind-driven generating device which is characterized in that blades are collapsible, the stressed area can be increased with the increase of a windward angle, and the stressed area can be reduced with the reduction of a leeward angle, thereby improving the effective rate of wind energy. By skillfully arranging an oil resistance regulation and control system between a spindle and a fixing mount (shell), the invention ensures more stable operation and avoids serious damage to equipment caused by emergency braking in an ultra-high wind speed situation and secondary damage possibly caused by sudden generation outage, thus the device provided by the invention is an excellent device which can not be subject to emergency braking and generation outage in an ultra-high wind speed situation.

The invention discloses a direct-driven front and back wind wheel contra-rotating wind driven generator and aims to solve the technical problem that the traditional contra-rotating wind driven generator has low energy utilization efficiency. The generator consists of two wind wheels, namely a front wind wheel and a back wind wheel, which are opposite in rotation direction, wherein the two wind wheels drive inner and outer rotors of the contra-rotating generator; and three airfoils with high lift drag ratio are arranged on the first and second wind wheels respectively. Wind power utilization factors are met and improved through reasonable power and flow match. The energy utilization efficiency of the generator is improved to 58 percent from 40 percent of the prior art.

The invention relates to a vibration-type wind power generation system. A conventional rotating wind turbine generator is not friendly to biology and environment, gets close to the limit of wind power utilization rate, is complex in structure, and is high in manufacture and maintenance cost. The system consists of a vibration generator, a damping fin group, an elastic supporting structure body, a piezoelectric material module, a synthetic fiber rope, and a spring damping stabilizer. The system is characterized in that the vibration generator is a hollow housing; the damping fin group is fixed on an inner wall surface of the vibration generator; the elastic supporting structure body is located below the vibration generator, and is used for supporting the vibration generator; the piezoelectric material module fastens and wraps the outer wall surface of the elastic supporting structure body; the upper end of the synthetic fiber rope is fixed on the vibration generator, and the lower end of the synthetic fiber rope is connected with the spring damping stabilizer; moreover, there is a certain length allowance. The system prevents a rotating wind turbine from affecting the biology and environment, is high in wind power utilization rate, is simple in implementation, and is suitable to be used in a populated region.

One kind of vertical shaft-blade wind motor includes blades, vertical shaft and speed stabilizing mechanisms. The blade consists of large blade frame and small blade frames mounted on the large blade frame via movable shaft. The speed stabilizing mechanism mounted between each small blade frame and the large blade to start the rotation of the small blade frame relatively to the large blade frame and around the shaft. The present invention has effectively raised wind energy utilizing efficiency of wind motor, and in case that the wind speed exceeds the rated value, the speed stabilizing mechanisms will alter the position of the blades to penetrate wind to reach the speed reducing and stabilizing effect. The present invention adopts two or many layer serial large blade frame structure to raise wind driving efficiency and makes it possible to realize large wind motor system.

A vertical shaft wind wheel relates to the device to use the wind energy. It is made up of the central axis, the connecting pole and more than 3 vanes. The vane is the arc curved vane which is set with the arc cross support and the vertical axis in the arc curved; the rectangle grid forms between the cross support and the vertical axis. The grid part is set with the active wind vane and the limiting part to control the wind vane rotating angle. The wind vane section is the airfoil shape which the front part matches with the vertical axis. The invention is installed on the vertical axis wind fan which the central axis and the arc vane are vertical to the ground. Under the level wind force, the wind vane on vane is forced by the thrust F1, the oblique force F2 and the lift force F3 to generate the moment M1, M2 and M3 to make the wind wheel rotate in a same direction; it would rotate continuously until the wind force stops. The invention can transform the wind energy into the electric energy or mechanism energy by many modes; also it has low request for the starting wind speed and high wind energy using efficiency.

The invention relates to a wind-gathering conjugation double-wind-wheel vertical shaft wind-driven power generating device which is used for increasing wind energy utilization efficiency of a vertical shaft wind turbine. Double wind wheels and a wind blocking and gathering device are disposed to block the wind in an original resistance area so as to form a negative pressure area and reduce windward resistance of two wind wheel blades having different motion trajectories in a rotation resistance area, part of blocked wind in the rotation resistance area is guided and gathered to drive acting areas on two sides to form high-pressure wind areas, wind speed is increased so as to increase the acting drive force of the reverse and forward rotation wind wheel blades in the drive acting areas, the two wind wheels generate conjugation effect, and eddy current energy, formed under air pressure difference, of the wind is utilized to increased the acting efficiency of the vertical shaft wind turbine. Wind-driven power generation application territorial scope is expanded by changing passive wind energy utilization into active wind energy utilization.

A vertical wind power generator comprises a tower column (1), at least one generator unit (2), at least two blades (3), an excitation control device (16), a rotation rectifying device (161), a bidirectional frequency converter (15), flanges (7-13), bearings (4-6), a cooling system, a crane (80) and a lift system. The generator unit (2) comprises a bracket (201), a generator (202) and an exciter (203). The bracket (201) comprises an outer bracket (2011) and an inner bracket (2012). The generator (202) comprises a stator (2021) and a rotor (2022). The exciter (203) comprises a stator (2031) and a rotor (2032). The vertical wind power generator can be manufactured at reduced cost, be rapidly started, improve the utilization efficiency of wind power, have a better cooling effect on the generator (202) and increase its operating life, and therefore reduce maintenance cost and time.

The invention discloses a wind energy pond aerator which is composed of a wind catching fan, a transmission shaft, a plurality of water stirring rotating wheels, a supporting column, a support and the like. Under the supporting of the supporting column, the wind catching fan catches air flow in upper air to rotate, the wind catching fan transmits kinetic energy downwards through the transmission shaft so as to drive the water stirring rotating wheels, the water stirring rotating wheels stir water in a rotating mode so as to increase the area and probability of contact between water and air, and the aim that dissolved oxygen in the water is increased is achieved. According to the wind energy pond aerator, fan blades of the upper air wind catching fan can elastically tend to be parallel to the wind power direction due to the increase of the wind power, damage by the strong wind is avoided, the fan blades can tend to be perpendicular to the wind power direction due to the decrease of the wind power, and the utilization efficiency of the wind energy is improved.

The invention discloses a wind power generation principle and a facility of a tower type jet injector, belonging to the technical field of wind power generation facility machining. The wind power generation principle and the facility are technically characterized in that a flange on an upright post for supporting a wind collecting plate and a flange on an arc pipe for supporting and fixing a jet injector generator set are used for connection and fixation; a plurality of arc slop cones of the jet injector generator set are connected together in such a way that one is sleeved on another to form a tower type jet injector wind power generator set; airflow in the horizontal direction is changed through each level of arc slop cone to upwards form continuous wind power; and the wind power drives a turbine on a generator mounted in the cone to rotate so as to generate electricity. The invention can be conveniently mounted on prior resources such as roofs, overhead advertising boards, trident building bodies, saves occupation space, reduces the investment cost, improves the wind energy efficiency and provides a product design for solving the sustainable development problem of energy shortage and environment pollution, to which attention is paid all over the world.

The invention discloses a double-half-vane type low-speed starting lift-to-drag interconversion type wind rotor system of a vertical-axis wind turbine. The wind rotor system comprises a spindle, connecting rods and variable type vanes. Each connecting rod includes an upper connecting rod and a lower connecting rod. The variable type vanes are connected to the spindle through the connecting rods and include first vanes and second vanes. The tops and the bottoms of each first vane are connected with the first connecting rod and the second connecting rod through a fixing rotary shaft. The second vanes are connected with the first vanes through front edge rotary shafts. Opening-closing portions are formed between the first and the second vanes. Lift type vanes are added between the spindle and the variable type vanes. According to the arrangement, automatic conversion between the drag type and the lift type of the variable type vanes are achieved, to be specific, the variable type vanes extend to be the drag type vanes in the case of low wind speed and automatically shrink to be the lift type vanes in the case of high wind speed. In this way, the advantages of the drag type vanes that starting torque is large and starting wind speed is low and the advantages of the lift type vanes that aerodynamic efficiency is high are scientifically and organically integrated. Thus the design goals of low-speed starting and efficient running are realized.

The invention discloses a flexible spiral wind power collection device and a spiral wind power generation system using the same, which comprise a shaft rope used for power transmission and a spiral shell fabric which is wound on the shaft rope and used for collecting wind power. A plurality of support frame strips are arranged on the shaft rope on one side of the spiral shell fabric, and a plurality of wind collectors are positioned on the other side of the spiral shell fabric. The flexible spiral wind power collection device belongs to medium-small wind power collection devices, has the advantages of being simple in installation and maintenance, high in wind energy utilization rate and the like, can choose different combination modes according to different environments, can be freely combined to be large or small, and can be applied to places with wind to generate power.

The embodiment of the invention provides a wind yaw-control parameter optimization method and device. The method comprises the steps of acquiring wind resource data of a target geographical environment; simulating yaw control over a wind power generator unit to acquire the simulation results of multiple wind yaw-control parameters of the target geographical environment according to the wind resource data and the multiple preset wind yaw-control parameters; conducting analysis on the simulation results of the multiple wind yaw-control parameters so as to classify the multiple wind yaw-control parameters; conducting optimization on the wind yaw-control parameters of the wind power generator unit according to different requirements of the target geographical environment and the classification. Through the wind yaw-control parameter optimization method and device provided by the embodiment of the invention, the wind yaw-control parameters of the wind power generator unit can be optimized according to the characteristics of wind resources of different geographical environments.