45 results about "Wind force" patented technology

A wind harnessing system using a plurality of self supporting airfoil kites 50 for useful power. The system comprising multiple airfoil kites 50 in tandem attached to a pivotal control housing 32 by control lines 58L and 58R and support lines 60L and 60R. Control lines 58L and 58R can change length with respect to the length of support lines 60L and 60R to control the airfoil kites' 50 angle-of-attack, pitch angle, direction of flight, and flight speed. The length of control lines 58L and 58R are controlled from ground station 30 by a movable pulley system in control housing 32 to adjust the airfoils' direction to follow a specific flight path 140. Control lines 58R and 58L and support lines 60R and 60L are also wound on a power shaft and pulley system in control housing 32. As the airfoil kites are propelled by the wind at very-high speed, the airfoils generate a powerful AXIAL force. The control lines 58L and 58R and support lines 60L and 60R are then reeled-out under this AXIAL tension causing the power shaft and pulley system in control housing 32 to turn a generator to generate electricity. After airfoil kites 50 have finished their reel-out power stroke 140a, the airfoil's pitch angle is greatly increased so they can be reeled-in by their control and support lines using a minimum of force along path 140b. Once the airfoils have been rewound to the proper distance, the airfoils are again angled for high-speed operation to generate powerful AXIAL force and reeled-out along 140c to provide another power stroke The airfoil kites are then reeled-in again along path 140d and an the entire process repeats starting with power stroke 140a. Since the force to rewind the airfoils is much less than the force generated during reel-out, there is net power generated.

A wind power plant and a method of start up at least a part of a wind power plant connected to an external grid substantially without any energy delivered from the external grid for the start up is provided. The wind power plant having a plurality of wind turbines and at least one power source connected to at least one of the wind turbines in order to start the wind turbine while isolated from the remaining wind turbines. The started wind turbine may then supply power in order to start further wind turbines. Power may be delivered to the grid from the started wind turbines.

A reinforcing sheet for wind power generator blades includes a resin layer and a restricting layer laminated on the resin layer.

Several embodiments that enhance and improve the efficiencies of vertical axis wind turbine generators by expanding their normal range of useful operations. Stationary vanes provided external to the rotor blades provide directional control of wind/air flow into the blades for decreased drag and increased differential wind pressure. Control scenarios for adjusting stationary wind vanes and additional ducting of air to increase efficiencies.

A wind power station comprises a wind rotor; a transmission mechanically coupled to the wind rotor; an asynchronous generator having a generator rotor mechanically coupled to the transmission, and a generator stator electrically coupled to a power grid; and a protection unit protecting the generator and the transmission against accidental breakdowns of an alternating voltage provided by the power grid. The Protection unit includes at least one choke electrically arranged between the power grid and the generator stator, and a synchronous electrical machine electrically coupled to the choke.

The invention relates to a fan direct-driven variable pitch system based on a digital twin and an optimum design method, and belongs to an optimum design method of a wind driven generator system. An SCADA (supervisory control and data acquisition) system and a sensor are installed in a physical solid model of the fan direct-driven variable pitch system, so that data of the generator speed, the wind speed, the power, a pitch angle, the variable pitch moment, the blade vibration, the environmental temperature and the like are collected; the data are transferred to the virtual space of the digital twin of the fan direct-driven variable pitch system by virtue of a digital twin mapping model, and the virtual space of the digital twin of the fan direct-driven variable pitch system is integratedwith multi-disciplinary, multi-physical quantity, multiscale and multi-probability simulation by updating a sensor and analyzing history data, so that the life cycle process of physical solid equipment of the corresponding fan direct-driven variable pitch system is reflected, the optimum design, production and reliable operation and maintenance of the system are completed, the problem of evaluation of the quality and manufacturability of the scheme after a traditional variable pitch system is manufactured can be solved, and the production cost is effectively reduced.

The invention discloses a control method for a yaw lubrication system of a wind turbine generator set. The control method comprises the following steps: initializing the lubrication time and the lubrication interval; setting a fixed lubrication time and a lubrication period; correcting the lubrication time and the lubrication interval according to temperature feedback from the wind turbine generator set; when detecting that a yaw system of the wind turbine generator set starts to act, accumulating the lubrication time but not the lubrication interval; when the yaw system does not act, accumulating the lubrication interval but not the lubrication time; every period of time, detecting whether the lubrication time accumulated during the time reaches the fixed lubrication time set above or not; when detecting that the lubrication time during the time does not reach the fixed lubrication time, forcibly performing lubrication for the lubrication period till the lubrication time during the time reaches the fixed lubrication time; and when detecting that the lubrication time during the time reaches the fixed lubrication time, continuing the cyclic detection till the wind turbine generator set stops working.

A hooded marine float wind power generation system includes a float platform set on a sea surface, a steel cable connecting the float platform and fixed to a sea bottom anchor to prevent undesired shining of the float platform. The float platform is provided with a wind power generator that is completely fixed on the float platform. A hood surrounds the generator to also function as a tail wing so as to make the float platform and the generator to change direction in response to wind direction and thus directly opposing to the wind to extract the most wind power and realize the best power generation performance. Due to the floating configuration of the float platform, the hood will not be tipped or damaged by side winds. Windmill blades can be made small is size and costs are thus reduced.

A sectional vane for vertical axis wind power generator includes a frame unit and a plurality of vane units. The frame unit is fixedly mounted to a main shaft of the wind power generator, and includes an upper frame member and at least one lower frame member. The upper and lower frame members are provided on inner side with an upper and a lower guide rail, respectively. The vane unit includes a vane body having an upper and a lower guide channel provided on a top and a bottom, respectively, corresponding to the upper and the lower guide rail. The vane units are assembled to the frame unit between the upper and the lower frame member through engagement of the guide channels with the guide rails. The sectional vane can be varied in height and area by providing different numbers of lower frame members and vane units.

The invention provides a fuzzy control method for wind power generation grid-connected running. The fuzzy control method comprises the following steps of firstly, building a wind power generation experiment system, wherein the wind power generation experiment system comprises two groups of wind power generators, two groups of AC/DC rectifiers, two groups of DC/DC converters and a public load, and the two groups of wind power generation devices are used for jointly providing electric energy for the load to use; secondly, building a mathematical model of the wind power generation experiment system according to a physical principle, wherein the mathematical model belongs to an interconnection system with two non-linear sub-systems; and finally, designing a distributed state feedback fuzzy controller based on the mathematical model, and giving out a simulation test platform of the system. With the distributed fuzzy control method provided by the invention, safe and stable running of a wind power generation network can be ensured.

The invention relates to a transmission system structure of a wind generating set, and in particular to a main bearing assembly of the wind generating set. The main bearing assembly of the wind generating set comprises an outer shaft, an inner shaft, a front bearing and a back bearing; the inner shaft is arranged in the outer shaft, the front bearing is arranged between one end of the outer shaft and one end of the inner shaft, and the back bearing is arranged between the other end of the outer shaft and the other end of the inner shaft; and a first flange is arranged at one end of the inner shaft, a second flange is arranged at the other end of the inner shaft, and a connecting flange is arranged on the wall of the outer shaft. The main bearing assembly has the beneficial effects that the structure is simple, the weight is small, and the cost is low; and the main bearing assembly is wide in application scope, and can be used on the set, in a machine cabin, of a transmission system and can also be used on a direct drive set, between the machine cabin and an impeller, of a power generator.

The invention relates to wind and light storage micro-grid system for an industrial park. The main technical characteristics lie in that the wind and light storage micro-grid system includes a wind and light generation device, a generation system measurement and control terminal, a storage unit, an invertion device and a far end control master station, wherein the input end of the wind and light generation device is connected with a wind energy device and a solar energy device; the wind and light generation device is connected with a generation system measurement and control device; the storage unit is connected with the invertion device; the output end of the wind and light generation device and the output end of the invertion device are switched in the grid or are connected to a load for supplying electricity for the load; the generation system measurement and control terminal is connected with the invertion device; the generation system measurement and control device is connected with the far end control master station. The wind and light storage micro-grid system effectively integrates the functions of wind generation, photovoltaic generation, energy storage, off-grid inversion, grid-connected feed and the like, realizes the multifunctional conversion of electrical energy, and has the characteristics of energy saving, environmental protection, low cost, high efficiency, stable performance, and the like.

A wind turbine tower which includes a number of sections, connected by bolted joints is disclosed. A bolted joint includes at least one connection of the bearing type and at least one connection of the slip resistant at serviceability type. In one aspect, the bearing type connection includes at least one non prestressed bolt and/or the connection of the slip resistant at serviceability type includes at least one prestressed bolt.

The invention relates to a damper for wind power generation. The damper for wind power generation comprises a cylinder body and further comprises a damping friction plate with the self-lubricating performance. One face of the damping friction plate is fixed to the lower end of the cylinder body in a bonded or embedded manner. The other face of the damping friction plate is pressed on a connectingring plate of a tower cylinder. The damper has the beneficial effects of being simple in structure, stable in friction damping, low in cost and long in service life.

The invention discloses a variable pressure yaw brake hydraulic system for a wind generating set and a control method thereof. The variable pressure yaw brake hydraulic system for the wind generatingset comprises a system oil source, a two-position three-way electromagnetic directional valve, a first energy accumulator, a variable pressure oil source loop and a yaw brake. An oil cylinder of the yaw brake communicates with a second oil port of the two-position three-way electromagnetic directional valve through two check valves with the opening directions being opposite. A first oil port of the two-position three-way electromagnetic directional valve is connected with the system oil source and the first energy accumulator. A third oil port of the two-position three-way electromagnetic directional valve is connected with the variable pressure oil source loop. The variable pressure oil source loop comprises two two-position two-way electromagnetic switching valves which are in parallel connection and a second energy accumulator which is connected with the two two-position two-way electromagnetic switching valves. According to the variable pressure yaw brake hydraulic system for the wind generating set and the control method thereof, the proper yaw brake pressure can be automatically and optimally selected according to external loads, the stability in the course of yawing is guaranteed without lowering drive capability, and the probability that yawing drive is subjected to impact loading due to external load magnitude variation and direction switching in the course of yawing is eliminated.

The present invention is one kind of wind driven generator with simple structure and high wind energy utilization. The wind driven generator consists of wind blades, driving shaft, generator set, differential gear, brake, rotating disc for fixing the differential gear and steel support. Compared with available technology, the present invention has the advantages of environment friendship, simple structure, low cost, high wind energy utilization and capacity of obtaining great power.

The invention provides a hydraulically controlled frequency stabilization power generating method, which comprises the following steps that: a. an impeller collects flow field energy and the flow field energy is converted into mechanical energy; b. the mechanical energy is transmitted to a parallel-connection pump unit with variable initial phase angles by a power distribution box to be converted into hydraulic energy, and the hydraulic energy is transmitted to a variable hydraulic motor through a current collector; c. a constant speed controller cooperates with a control valve group in a control loop and an electric control variable mechanism in the hydraulic motor to obtain flow entering the hydraulic motor and the optimal matching of displacement of the hydraulic motor, so that the hydraulic motor rotates at constant speed and outputs the mechanical energy, and the mechanical energy is transferred to a generator; and d. the constant-speed stable mechanical energy is converted into constant frequency electrical energy to be output by the generator. The invention adopts a closed hydraulic loop to realize the conversion and long distance transfer of flow field energy, solves the problems that the existing wind power generating device has high cost, difficult constant frequency and voltage regulation, difficult installation and maintenance and the like, and can effectively reduce the construction and operation and maintenance costs of wind power generating equipment.

Rotor blades for wind turbines include a structural support member disposed internal the rotor blade that extends for at least a portion of a rotor blade span length, an airfoil structure supported by the structural support member, and a support flange connecting the airfoil structure to the structural support member. The support flange includes a first wall connected to the structural support member, a second wall connected to the airfoil structure, and a connection wall that extends between the first wall and the second wall.

The invention discloses an automatic bird-repellent device used for high-voltage transmission line poles and towers. Compared with the prior art, wind force is utilized in the device for driving rotating blades to do up-and-down reciprocating motion on a bearing shaft, when wind force is small, the rotating blades only can rotate on a limiting baffle, when wind force becomes large, by means of thespecial structures of the rotating blades, lift force is generated, and the rotating blades thus do the ascending motion on the bearing shaft and thus return to the limiting baffle when wind force isreduced; the length of the bearing shaft can be freely controlled, and according to the heights of the transmission line poles and towers and places where birds are likely to nest, wiremen can install the bird-repellent device in a target mode; light reflection components are arranged on the surfaces of a connection rod and a wind hood, the bird-repellent range of the device is increased, and thedevice is reasonable in structural design, easy to install, long in service life and good in bird repelling effect.

The invention discloses a wind driven generator capable of being started immediately and relates to wind driven generators. The wind driven generator is provided with a motor, a motor control module, a generator body, a load output control module, a wind turbine and a sensor module. The motor control module is connected with the motor, the generator body is connected with the motor through a transmission mechanism, the input end of the load output control module is connected with the generator body, and the output end of the load output control module is connected with a load. The wind turbine is connected with the generator body through a transmission mechanism, the sensor module is connected with the motor control module and the load output control module through a CAN bus, and the sensor module is connected with the generator body. The wind driven generator has the features of rapidly-started wind driven generators, the starting time is shortened, soft starting is conducted on the motor, and the service life of the motor is prolonged; power monitoring is conducted on the generator body, the maximum power point can be effectively and automatically tracked, and the service life of the generator body can be prolonged; the CAN bus is used for communication, the communication distances between all the modules are effectively enlarged, and the application field is effectively widened.

The present invention relates to wind driven generator, and is especially one kind great power cyclone-resisting constant speed wind energy absorbing tower for utilizing wind energy in generating electricity. It has several superposed wind absorbing units, each of which includes frame, blade combination and central shaft. Each of the rotating blades arranged inside the frame has upper and lower ends connected controllably to the frame. In the upper and lower of each blade, there are controllable blocking units, and on the frame, there is wind strength sensor connected to the control center. There are also one or several wind driven generators set. The present invention has the advantages of large wind accepting area, great power, strong wind resistance, and capacity of utilizing wind in all direction.

A plane grating measurement based vector circular arc stage change method and device of a moving-coil magnetic suspension dual-workpiece stage belongs to the technology of a semiconductor fabrication device. The device comprises a support frame, a balance mass block, magnetic suspension workpiece stages, a workpiece stage measurement device and a workpiece stage driving device, wherein the two workpiece stages work between a measurement position and an exposure position, a plane grating is used for measuring the positions of the workpiece stages, a passive compensation structure composed of a planar leaf spring and an electromagnetic damper is used for carrying out motion compensation on the balance mass block, the workpiece stages are driven by a magnetic suspension planar motor, and in the dual-workpiece stage exchange process, the workpiece stages are driven by the planar motor to achieve rapid stage change in a single-beat arc manner. By the device, the problems of many beats, long track, many start-stop links, long stable time, large cable winding force and the like of the traditional stage change scheme are solved, the stage change link is reduced, the stage change time is shortened, and the yield of an photoetching machine is improved.

The invention discloses a wind power generator automatic turning lifter. The wind power generator automatic turning lifter consists of a lifting rod, a hydraulic system, a rope and a turnover power system; the lifting rode mainly consists of a lifting rod body, extension rods, a cable wind hole, a hydraulic oil pipe fixed hanging hook and a lifting rod support leg; the extension rods positioned at two ends of the lifting rod body respectively realize elongation of single surface of the lifting rod through hydraulic rods; the hydraulic system consists of a hydraulic station, hydraulic pipe branch joints, hydraulic pipe quick joints, hydraulic oil pipes and hydraulic rods; the hydraulic rods positioned at two ends of the lifting rod body are respectively connected with the hydraulic pipe quick joints on the hydraulic station through the hydraulic oil pipes; a pair of hydraulic rods at the middle part of the lifting rod body is respectively connected with the hydraulic pipe branch joints on the hydraulic station through hydraulic oil pipes. The wind power generator automatic turning lifter has the following beneficial effects: the wind power generator automatic turning lifter is reasonable in structure and convenient for installation and operation, and greatly improves the generator turning efficiency and precise control of the generator turning angle.