4388 results about "Wind power generator" patented technology

The present invention relates to wind generators installed off-shore, in particular at sea, to support structures forming a part of such wind generators, and to methods of making and installing such wind generators. The technical field of the invention is that of making, transporting, and installing wind generators for producing electricity, more particularly off-shore, and in large numbers, so as to form wind "farms". The wind generator of the invention comprises a wind turbine and a deployable telescopic pylon or support supporting the turbine, and a gravity base supporting the pylon or support.

A stored energy system is provided for delivering AC electrical power to a load. This system includes a single housing containing within a battery bank for storing DC power, and an inverter for receiving either DC power or AC power and converting DC power to AC power. The stored electrical system includes five circuit breakers mounted on the outside surface of the housing. Twist lock plugs are connected to each of the circuit breakers for removably connecting input power sources and output loads with the circuit breakers. A first circuit breaker is connected to a solar power source. A second circuit breaker is connected to a wind generator. A third circuit breaker is connected to a generator for generating AC power. A fourth circuit breaker is connected to a utility supplying AC power. A fifth circuit breaker is connected to the outside AC power load.

A public transportation system includes control by highly distributed communications, ultra-light transit vehicles suspended from single or dual rails and powered by electricity. The electric power supplied independently and supplemented by wind generators and solar panels. The transit vehicles, are suitable to transport from one to four persons. The system includes a plurality interconnected rails with main conduits and station conduits to provide non-stop transportation from one station to another station.

A method for limiting loads in a wind turbine by using measured loads or wind speed to increase the minimum pitch angle for extended periods. The minimum pitch angle will be allowed to relax down to the default when load excursions diminish. The method will allow turbines to capture more energy by operating in higher wind speeds and/or utilizing larger rotors without additional loss of fatigue life.

The invention discloses a vibration monitoring-based wind generator set automatic fault diagnosis method. The method comprises the following steps: an acceleration sensor collects original vibration signals, a pre-communication subsystem stores and uploads data, and a central monitoring server receives data and stores the data in a database. The method also comprises the step of establishing a fault characteristic frequency library in the database which is used as the basis of fault diagnosis. The method of the invention can automatically realize the fault early warning and fault diagnosis of the key parts of the wind generator set; and the fault characteristic frequency pool can be continuously updated to realize the self-learning function of the method, thus improving the fault diagnosis function continuously.

The invention discloses an online state monitoring and fault diagnosis system of a wind generator set. The system comprises four parts of a monitoring device, an upper computer, a central monitoring center and a remote diagnosis center, wherein the monitoring device is used for realizing signal acquisition and processing and communication with the upper computer; the upper computer is used for carrying out fine analysis on sample data and displaying various graph spectrums and fault analysis diagnosis and the like; the central monitoring center can monitor the state of fans in each wind fieldin a browsing manner; and the remote diagnosis center is used for periodically acquiring fan data of the wind field, periodically analyzing the state of the fans and carrying out fault analysis and location when alarming information sent by a certain fan is received.

The invention relates to a composite material for a wind power generator blade. The composite material comprises the following components in parts by weight: 40-75 parts of thermoplastic resin component, 25-60 parts of reinforced fiber component and 0-5 parts of additive. Compared with the prior art, the invention has the advantages of meeting high strength, high modulus, ageing resistance, and the like required by a wind power generator blade.

A rotor blade assembly and a method for reducing the noise of a rotor blade for a wind turbine are disclosed. The rotor blade has surfaces defining a pressure side, a suction side, a leading edge, and a trailing edge extending between a tip and a root. The rotor blade assembly further includes a noise reducer configured on a surface of the rotor blade, the noise reducer including a plurality of noise reduction features. Each of the plurality of noise reduction features includes a first surface and a second surface. The first surface includes a first portion mounted to one of the pressure side or the suction side and a second portion configured to interact with wind flowing past the other of the pressure side or the suction side. The second surface interrupts an aerodynamic contour of the one of the pressure side or the suction side.

In one embodiment, the present invention includes a turbine to generate mechanical energy from kinetic energy, a generator coupled to the turbine to receive the mechanical energy and to output multiple isolated supply powers, and multiple power stages each coupled to the generator. Each of the power stages may receive at least one of the isolated supply powers.

The invention relates to a multifunctional automatic climbing device, particularly to an automatic climbing device which is suitable for a variable diameter fan tower barrel and can carry various working equipment. The multifunctional automatic climbing device is composed of a guide rail, an upper clamp, a lower clamp, a connecting platform and a power hydraulic cylinder. The lower clamp is fixedly connected to the bottom of the guide rail; the upper clamp is slidingly mounted on the upper part of the guide rail and can be vertically moved along the guide rail by effect of the power hydraulic cylinder; the connecting platform for connecting other working equipment is mounted on the top of the guide rail; the upper and lower clamps have two-layer structures; each layer is equipped with four fingers; and the upper clamp is installed with a control box and a hydraulic box. The multifunctional automatic climbing device can be connected with other working equipment to realize repairing and detection of a wind power generator, for example, the multifunctional automatic climbing device is connected with a lifting device to finish lifting and repairing of parts in a cabin and is connected with an annular platform to realize repairing and maintenance of outer surfaces of the tower barrel and blades. The multifunctional automatic climbing device has the characteristics of no height and region limitation, high automation level, ground remote control, and the like.

A wind power recovery device has a tower, a rotor arranged on the tower and including a plurality of blades rotatable under the action of wind, the rotor also having an axis for transmitting the rotation of the rotor to another apparatus, a wind channeling body provided with a series of walls which form channelings with a section which is progressively reduced from an entry side of the wind channeling body to an exit side of the channeling body toward the rotor to affect tangentially the blades of the rotor at a speed higher than at the entry side of the body, the wind channeling body having a side face, and a blind protecting the side face of the channeling body.

Disclosed are a model prediction control method and a model prediction control system for all working conditions of a wind generating set. The system comprises an MPC (model prediction control) device, a feedback information measurer, a wind wheel, a driving chain, a tower, a generating unit, a variable propeller driver and a converter. The feedback information measurer is used for detecting status variables of the wind wheel, the driving chain, the tower and the generating unit and transmitting detecting results to the MPC device, the MPC device is used for computing targets of the blade pitch angle and the generator torque, and the variable propeller driver and the converter are used for adjusting the blade pitch angle and the wind generator torque. The method is used for computing control increment by means of a variable propeller control prediction model and a torque control prediction model, takes the status variables including driving chain torsional displacement, driving chain torsional speed, blade plane external first-order flap displacement, blade plane external first-order flap speed, tower front-back first-order swing displacement, tower front-back first-order swing speed, mechanical loads of the unit and the like, and two prediction models can be automatically switched in different working conditions, so that the wind generating set can be operated in all working conditions.

A rotor blade assembly for a wind turbine is disclosed. The rotor blade assembly includes a rotor blade having surfaces defining a pressure side, a suction side, a leading edge, and a trailing edge extending between a tip and a root. The rotor blade assembly further includes a noise reducer configured on a surface of the rotor blade. The noise reducer includes a plurality of noise reduction features and a plurality of auxiliary noise reduction features. Each of the plurality of auxiliary noise reduction features is configured on one of the plurality of noise reduction features.

The present invention provides a wind-turbine rotor-blade hoisting apparatus that enables attachment and removal of wind-turbine rotor blades without using a plurality of heavy machines and that enables attachment and removal of wind-turbine rotor blades on a site having a complex land shape with little flat land, a method for attaching a wind-turbine rotor blade, and a method for constructing a wind power generator. The present invention is characterized in that it includes a sheave (14) that guides a hoisting wire (17) from a rotor head (4), to which a wind-turbine rotor blade (6) is to be attached, toward the wind-turbine rotor blade (6) and that is arranged so as to be movable in a direction along the rotation axis of the rotor head (4); a retaining portion (15) that retains an attaching end of the wind-turbine rotor blade (6) such that a line connecting the center of gravity of the wind-turbine rotor blade (6) and a connecting portion, to which the hoisting wire (17) is connected, crosses the longitudinal axis of the wind-turbine rotor blade (6); and a winch (12) that is disposed on the ground and that draws the hoisting wire (17) to wind up or let out the retaining portion (15).

The structure of the system includes three parts: the control part, the detection part and the drive part. The control part consists of three parts: the main controller i.e. the operation controller,the distance change control and the speed change controller. The detection part includes the wind wheel rotor, the stator of double fed generator, the variable frequency power supply of speed drop excitation and the invention power source of pulse-width modulation etc. assembled sensors. The drive part is composed of the servomotors with different functions. The sensed signals are output from thedetection part. The control signals output from the interlinkage drive module controls harmonious operation. The invention provides the features of simple structure, stable and reliable running and flexible control.

Enclosed is an active and reactive coordination control method for permanent-magnet direct-driven wind turbines in the low-voltage ride-through process. Two different control strategies are employed for a grid side converter according to amplitude change of power grid voltage: when the power grid voltage is in a normal state, the grid side converter is in an active-priority maximum power tracing control mode so that the wind turbines capture wind energy to the maximum extent; when the power grid voltage is beyond the normal range, the grid side converter is in an active priority control mode so that the dynamic reactive current which is injected into an electricity system meets the requirements of grid combining. An engine side converter is in a direct-current voltage control mode based on rotor energy storage, power unbalance of the direct-current side of the engine side converter is relieved and the direct-current voltage is stabilized by utilizing the self rotating speed of the permanent-magnet direct-driven wind turbines and the change of the kinetic energy. The active and reactive coordination control for the wind turbines before or after the sudden change of the power grid voltage is realized according to the amplitude change of the power grid voltage, the fluctuation of the direct-current bus voltage is restrained by releasing or storing the rotor kinetic energy, so that the low-voltage ride-through capability of the permanent-magnet direct-driven wind turbines is improved, reactive power support is rapidly and accurately provided for the power grid, and certain support is given to restoration of the power grid voltage.

A rotor blade assembly for a wind turbine is disclosed. The rotor blade assembly includes a rotor blade having a pressure side, a suction side, a leading edge, and a trailing edge extending between a tip and a root, the rotor blade further defining a pitch axis. The rotor blade assembly further includes a noise reducer mounted to the rotor blade. The noise reducer includes a base plate defining a base line, a plurality of noise reduction features extending from the base line, and a plurality of apertures defined in the base plate. Each aperture is positioned on an opposite side of the base line from the plurality of noise reduction features such that the aperture is fully defined in the base plate.

The invention relates to a microgrid multi-energy joint optimal scheduling method. The method includes: step 1, on the basis of force application conditions of energy supply equipment and operating states of energy storage equipment in different scenes, constructing a physical model of a multi-energy system; step 2, establishing unit mathematical models, including a wind power generator model, a photovoltaic power generation model, a micro-gas turbine model, a fuel cell model and an energy storage model, of the microgrid multi-energy system; step 3, in order to realize lowest comprehensive cost in system operation, constructing a microgrid multi-energy optimal scheduling model by taking DG operation constraints, system safety constraints and multi-energy coupling characteristics into comprehensive consideration; step 4, on the basis of reversed order dynamic planning, solving the microgrid multi-energy optimal scheduling model to obtain a microgrid multi-energy joint optimal operatingstrategy. By the microgrid multi-energy joint optimal scheduling method, operating demands in different scenes can be met, electricity-thermal coordinated optimal scheduling schemes are provided for operating of a comprehensive energy microgrid in different scenes, and high integral operating efficiency and high economic benefits are realized.

An object is to provide a wind turbine blade having a serrated plate that can be formed irrespective of the overall structure of the blade, that is attached in the optimum shape, and that can effectively suppress noise occurring at a trailing edge thereof, and also to provide a wind power generator using such a wind turbine blade. Provided is a wind turbine blade (9) formed by bonding a back skin (19) and a front skin (21) and having a serrated plate (35) attached to a trailing edge (33) thereof, and the serrated plate (35) is formed so as to be attached by bonding the back skin (19) and the front skin (21).

In a plant for generating electric power through at least two generators separately driven by wind power and feeding an alternating voltage to an alternating voltage line in common, a converter is adapted to convert the alternating voltage into direct voltage and conversely. The plant has means (29, 30) adapted to measure the total power fed towards the converter from the wind power generators and members (32) adapted to send orders to a unit (14) adapted to control the converter (9) for adjusting the control thereof depending upon power values delivered by said means to such a frequency that a power maximum is obtained.

The invention provides a simulation modeling method for equivalent simulation of a doubly-fed wind-power generator set. A frequency converter of the doubly-fed wind-power generator set is simulated by controlled source. The simulation modeling method includes the following steps of (1), building a model of a circuit of the doubly-fed wind-power generator set; (2) building an equivalent model of the doubly-fed wind-power generator set; (3) building a grid-integration testing system of the doubly-fed wind-power generator set; and (4) setting up a testing system for multiple wind-power generator sets, wherein in the step (2), the equivalent model of the doubly-fed wind-power generator set is built on the basis of characteristics of a controlled voltage source of an alternating-current side and a controlled current source of a direct-current side of the frequency converter of the doubly-fed wind-power generator set. By the aid of the simulation modeling method, transient-state characteristics of the doubly-fed wind-power generator set can be simulated accurately, and different characteristics and mutual affection among multiple wind-power generator sets can be computed. High-frequency on and off of fully-controlled devices cannot be taken into consideration, and simulation efficiency is improved greatly. The more the wind-power generator sets are simulated, the more evidently the efficiency is improved, simulation step-length can be increased on the premise of guaranteeing accuracy, and simulation efficiency is improved greatly.

The invention discloses a method for analyzing fluid dynamics and structural mechanics of wind generator blades, which comprises the following steps: combining CFD and CAE methods, determining each parameter of an impeller model by adopting the momentum blade element theory, designing an entity model of the blade, establishing a three-dimensional model of a windmill blade, a hub and a peripheral wind site based on a Gambit software platform, meshing the model by adopting a partial structuring method, setting a proper boundary condition, calculating the performance of a finite element based on a Fluent software platform, extracting the blade torsion and calculating the blade power and the blade efficiency, establishing a blade structural model based on an ansys software platform and meshing the blade structural model, applying load and restraint condition to the blade structural model, analyzing the mode of the blade structure, performing equal torque treatment for pressure distribution acquired by the Fluent software platform, applying pressure surface load to the ansys software platform, calculating the structural mechanics characteristics of the wind generator blades, and extracting blade deformation and stress distribution characteristics.

The invention relates to a megawatt wind generating set combination control policy. When the wind speed of a wind generator fluctuates at rated wind speed, a torque control policy and feather control policy simultaneously remain in operation state, so as to realize undisturbed switching between a feather PID controller and a torque PID controller. The invention makes the best of the integral saturation characteristic of PID algorithm, so that switching between the torque PID controller and the feather PID controller is smooth and sensitive, mutual interference between the feather controller and the torque controller in the previous switch mode switching process while only one controller is ensured to operate at the same time, drastic fluctuation of wind generator power when the wind speedfluctuates at the rated wind speed is avoided, further load impact is reduced, electric energy quality is improved, reliability of the wind generating set is improved, and operation performance of the wind generating set is improved.

A wind generator having removable change-out bearings includes a rotor and a stator, locking bolts configured to lock the rotor and stator, a removable bearing sub-assembly having at least one shrunk-on bearing installed, and removable mounting bolts configured to engage the bearing sub-assembly and to allow the removable bearing sub-assembly to be removed when the removable mounting bolts are removed.

A small and cost effective sewage treatment system intended for unattended use in individual homes, small industries or businesses in locations where a central sewage treatment plant is not available. The sewage treatment system comprises a conventional septic tank which drains into a smaller aerated holding tank, a pump to transfer effluent from the holding tank into a disinfecting chamber, a regenerative heat exchanger used to raise the temperature of the effluent while being aerated in the holding tank, means for pumping the effluent at a controlled rate through a microwave field, and a conventional drain field used to release the disinfected water into the surrounding soil. Operation of this system is fully regulated by a micro-controller, thereby eliminating the need for human intervention during normal use. This invention also incorporates electronic means for detecting various fault conditions which may impede effective disinfection, means for diagnosing what part of the system is at fault, means for reporting the fault and diagnose to a central municipal location via a telephone or transponder system, an emergency battery backup system, and means for reverting system operation to that of a conventional septic tank and drain field system is case of a total power failure (both A/C and DIC) or water pump failure. Conventional household alternating current or a battery recharged via a wind generator or solar cells may power the sewage treatment system.

A wind turbine is provided. The wind turbine includes a tower including a yaw interface, a bladed rotor including at least one blade rotatable in response to wind impinging upon the at least one blade, and a beam structure configured to support the bladed rotor. The beam structure includes at least two beam members. Each of the at least two beam members is coupled to the yaw interface by at least one joint element, so that the bladed rotor is rotatable about a yaw axis of the wind turbine. At least two of the joint elements are spaced apart along a longitudinal axis of the tower. Further, another wind turbine including a yaw interface and a method for controlling a yaw angle of a wind turbine are also provided.

The invention provides a wind turbine set gearbox remote online state monitoring and life assessment method. The method comprises the following steps: (1) a remote center computer collects a real-time operation parameter, temperature data and vibration data of each wind turbine through SCADA; (2) through analyzing the characteristic values of signal time domain and frequency domain, whether a vibration sensor has a fault or not is diagnosed; (3) the data is subjected to normalization process, a difference between data is reduced, and the diagnosis precision is raised; (4) when the fault of a wind generator set gearbox is diagnosed, different filtering modes are employed for different algorithms to extract the corresponding characteristic; (5) the collected data is subjected to characteristic extraction; (6) the fault diagnosis is carried out to provide the fact that whether the fault exists or not and the degree of the fault; (7) the residual life of the failed gearbox is estimated through a gray theory model, and an autoregression model is established for the residual error of the predication result to raise the predication precision. According to the method, the real-time estimation of the residual life is realized, and a basis is provided for the planned maintenance of the wind turbine set.

The invention discloses a health monitoring system and method for a wind generator system structure. The system provided by the invention comprises a data storage analytical device and a data collecting device, wherein the data storage analytical device and the data collecting device are communicated through a wireless signal, the data storage analytical device comprises a mechanical model analytical module, a data receiving module, a structure safety judging module, a vascular grade judging module and a vascular execution module; the data collecting device comprises a sensor group and a data transmitting module, and the sensor group is connected with the data transmission module through a wire cable; and the system judges whether the structure is damaged or not through a certain detection means and a method, the locating and evaluation of the damage are carried out to avoid the damage, thereby realizing the damage detection of a wind power generation infrastructure and health monitoring of a discriminating structure. Meanwhile, the invention also aims to provide a health monitoring method for the wind generator system structure.

In a wind turbine generator system including an AC exciting converter a grid side converter, and a controller configured to control the AC-exciting converter and the grid side converter, the controller operates a short-circuiting circuit when decrease in the grid voltage and increase in the DC voltage are detected.

The invention relates to a system for connecting wind generator blade sections, preferably for the application in the connection of blade sections (1, 2), the formation of which comprises skins (3) determining the outer aerodynamic profile, arranged on inner stringers (4) like longitudinal partitions, the connection between the sections (1, 2) being established by means of rods (12) which are included through holes (8) defined in a longitudinal direction on the inside of the skins (3) and of the stringers (4) in the sections (1, 2), with the threaded connection of said rods (12) at one end on respective elements (11) which are fitted in one of the sections (1) and the tension is tightened by means of corresponding nuts (14) which are incorporated on the other end of said rods in the other section (2).