56 results about "Yaw drive" patented technology

The invention relates to the technical field of risk analysis, in particular to an offshore wind power project risk assessment method and system, and the method comprises the following steps: collecting a wind speed value according to the hub height of multiple units of an offshore wind power plant, obtaining the unit power, yaw angle change and vibration amplitude, and calculating the wind speed change rate; according to the method, through combination of blade vibration, yaw driving feedback and tower stress monitoring data and multi-source information cross analysis, the calculation precision of the unit load fluctuation rate is improved, the wind shear influence is quantified through the wind shear strength coefficient, and the risk prediction capability under the condition of dramatic change of the wind speed is improved; yaw error cumulative effect dynamic evaluation optimizes unit yaw precision management and control, reduces influence of long-term operation deviation on equipment stability, computes unit operation state unstable factors through multi-dimensional data fusion, comprehensively quantifies wind speed change, load fluctuation and yaw error influence, perfects a risk evaluation system, optimizes a wind turbine generator risk evaluation model, and improves wind turbine generator risk evaluation accuracy. And the safety management level of offshore wind power projects is improved.

A wind turbine nacelle includes a stub mast, a frame rotatably mounted on the stub mast, and a yaw drive system that rotates the frame to adjust orientation of the frame. The yaw drive system includes a yaw brake assembly positioned coaxially with the stub mast that exerts a constant braking torque on a brake disk connected to the frame and has a brake pad with a coefficient of friction that creates the braking torque without slipstick.

The invention relates to the technical field of wind power generation. The invention provides an emergency yaw and automatic crosswind method and system for a wind turbine generator. The method comprises the following steps: monitoring the on-off state of a safety chain in real time, and activating an emergency power supply switching module when detecting that the safety chain is disconnected; synchronously acquiring unit vibration spectrum, impeller rotating speed, environment wind speed and cabin load distribution data, and generating dynamic risk assessment parameters based on a multi-source signal fusion algorithm; inputting a hierarchical control instruction to a yaw driver according to a comparison result of the risk assessment parameter and a preset threshold value; and in the automatic crosswind control stage, the yaw rate and the angle offset are dynamically adjusted based on the blade root bending moment real-time feedback and the wind speed change rate, so that the unit maintains the aerodynamic load balance in the non-windward state. The problems that after a safety chain of an existing wind turbine generator is disconnected, yaw capacity is completely lost, emergency crosswind protection or fault recovery cannot be achieved, and a traditional emergency yaw scheme is high in cost, complex in maintenance, slow in response, difficult to adapt to complex working conditions and the like are solved.

The utility model relates to a yaw driving system of a wind generating set, which comprises a central driving device arranged at the central position of a rack and used for driving the rack to rotate, a barrel body arranged below the rack, and the rack and the barrel body are coaxial; the rotary supporting mechanism is arranged between the rack and the barrel; and the central driving end of the central driving device is in transmission connection with the rack. According to the yaw driving system of the wind generating set, the center driving device is arranged at the position of the center axis of the rack to drive the rack to rotate, and the problems that in the prior art, the number of driving speed reducers is large, and asynchronization exists are solved; the driving device of the yaw driving system of the wind generating set is installed in the center, so that power transmission can be optimized, the stability and transmission efficiency of the whole structure are improved, vibration caused by uneven wind power is reduced, and the layout of the internal space of the rack is optimized.

The invention discloses a yaw self-checking system and self-checking method for a wind generating set, and relates to the technical field of wind driven generators. The yaw self-checking system comprises a sensing system, a data collector and a data analysis module; the sensing system comprises displacement sensors and current sensors, the current sensors are installed on power supply lines of yaw driving motors, and each driving motor is provided with at least one current sensor; the displacement sensor is installed on a front rack of the wind generating set, the tooth top of a yaw bearing gear ring serves as an induction reflection face, and the displacement sensor is an eddy current sensor. The data acquisition unit is used for acquiring real-time current signals of each displacement sensor and each current sensor; the data analysis module is used for analyzing the real-time current signals of the displacement sensor and the current sensors collected by the data collector, obtaining a fault analysis result and sending the fault analysis result to the master control system. Through active driving detection in a shutdown state and in combination with synchronous analysis of current and displacement, accurate identification of yaw driving motor system faults and gear ring jumping can be realized, and early diagnosis and early warning of the faults of the yaw system are realized.

The utility model discloses a yaw driver repairing and debugging device based on a wind turbine generator, and relates to the technical field of wind turbine generators, the yaw driver repairing and debugging device comprises a first limiting connecting ring, a rotation limiting groove is formed in the first limiting connecting ring, and a bearing ball is rotatably connected in one side of the rotation limiting groove; and a rotating ring is rotationally connected to the interior of the rotating limiting groove, a connecting rod is fixedly connected to the bottom end of one side of the rotating ring, and a main force gear rotating disc is fixedly connected to the bottom end of one side of the connecting rod. First driving motors on first mounting side plates on the two sides of a first limiting connecting ring are arranged to directly control rotation of a repairing debugging gear, yaw driving repairing operation is achieved for a main force gear rotating disc, rotation transmission operation is synchronously achieved on the two sides, and the transmission repairing efficiency of the device is improved; rotation of the main force gear rotating disc can drive the rotating ring to rotate in the rotating limiting groove, and deviation correction operation is achieved through the rotating angle of the rotating ring relative to the power main shaft.

Yaw drive monitoring method The invention describes a method of monitoring a wind turbine yaw system (2) comprising a plurality of yaw drives (D1, …, D8), which method comprises, for each yaw drive (D1): receiving encoder data (Eout) from a motor speed encoder (E) of that yaw drive (D1); computing a signal mean (10M) on the basis of the received encoder data (Eout); computing a collective signal mean (10Mcoll) from the signal means (10M) of the other yaw drives (D2, …, D8); comparing the signal mean (10M) to the collective signal mean (10Mcoll); and flagging that yaw drive (D1) as potentially faulty if the corresponding comparison result (10Δ) exceeds a predefined threshold (10T). The invention further describes a monitoring arrangement (1) for a wind turbine yaw system (20); and a 15 wind turbine (2) comprising such a monitoring arrangement (1).

The application discloses a kind of wind turbine's auxiliary yawing of variable pitch to wind control method and system, comprising: based on the direction of measured cabin and average wind direction, optimal yaw trajectory is planned, and cabin yaw target angle is output;According to cabin yaw target angle, the yaw variable pitch instruction of each blade is calculated, for generating yaw moment in wind wheel plane to promote cabin yawing;According to the yaw rate of cabin actual yawing, the yaw variable pitch instruction of each blade is calculated, for controlling yaw rate smooth in cabin yawing process;After the superposition of the yaw variable pitch instruction of each blade and yaw variable pitch instruction of each blade, the superposition of the unified variable pitch instruction given by unit is carried out, and the final variable pitch instruction of each blade is obtained;The final variable pitch instruction of each blade is transmitted to the variable pitch system of unit, and the variable pitch of blade is driven by variable pitch system, to realize driving cabin yawing.The application can effectively solve the problem of insufficient yaw driving capacity, and reduce the number of yaw driving motor.

To provide a wind power generation device and a control method of the wind power generation device capable of preventing an excessive load from acting on a yaw driving device by detecting a load directly acting on the yaw driving device by a simple method without adding a load sensor or the like.SOLUTION: A yaw-controllable wind turbine power generating apparatus includes a rotor 14 and a nacelle 3, and further includes a state quantity acquisition unit configured to acquire a state quantity that varies in accordance with a yaw-direction behavior of the wind turbine power generating apparatus, and a control device 15 configured to determine a yaw high load state of the wind turbine power generating apparatus on the basis of the state quantity.SELECTED DRAWING: Figure 4

A braking force measuring method for a wind turbine is provided. The wind turbine includes a ring gear, a yaw drive device driving a pinion meshing with the ring gear to make the wind turbine turn, and a brake device that prevents the nacelle from turning in the yaw direction by pressing a friction body against the ring gear. The method includes: braking the ring gear by the brake device; measuring a load on a rotating shaft of the pinion that mesh with the braked ring gear; determining a maximum value of the load during a time period when input torque is applied to the pinion, the input torque being applied with the nacelle held still and until the friction body begins to slip and the nacelle begins to turn in the yaw direction; and converting the determined load to the braking force.

The utility model discloses a wind turbine generator yaw drive carrying device which comprises a first supporting frame, a second supporting frame and a first hanging beam piece, the side end of the first supporting frame is fixedly connected with the second supporting frame, and the upper end of the first supporting frame and the upper end of the second supporting frame are fixedly connected with the first hanging beam piece. The side end of the third supporting frame is fixedly connected with a fourth supporting frame, and the third supporting frame and the fourth supporting frame are fixedly connected with a third hanging beam piece; the lower end of the first hanging beam piece and the lower end of the third hanging beam piece are fixedly connected with a second hanging beam piece through first gaskets and screws, the lower end of the second hanging beam piece is supported through a supporting base, pulleys are arranged on the first hanging beam piece and the third hanging beam piece in a sliding mode, and a first protection cover is arranged at the lower end of the pulley located on the first hanging beam piece in a hanging connection mode. And a second protective cover is hung at the lower end of the first hanging beam piece on the third hanging beam piece. The utility model relates to a yaw-driven carrying device for a wind turbine generator, which achieves the purpose of carrying through the arrangement of the structure.

The utility model provides a yaw driving rotating speed monitoring device of a wind turbine generator set, which is used for realizing high-precision and low-cost monitoring of yaw driving rotating speed and realizing rapid installation and maintenance of the device. The yaw driving rotating speed monitoring device of the wind turbine generator comprises an electromagnetic brake, a yaw driving motor, a proximity switch support, an inductance type proximity switch and a flange plate provided with a speed measuring hole. A central shaft of the yaw driving motor sequentially penetrates through the electromagnetic brake and the flange plate; a plurality of speed measuring holes are evenly distributed in the flange plate in the circumferential direction of the flange plate. The proximity switch support is fixedly installed on the side, facing the flange plate, of the proximity switch support. The induction end of the inductance type proximity switch is perpendicular to the surface of the flange plate and right faces the rotation track of the speed measurement hole, and a preset detection distance is kept between the induction end of the inductance type proximity switch and the surface of the flange plate.

Systems, methods, and computer program products for controlling a yaw system of a wind turbine. The yaw system includes mechanical brakes that provide a first amount of braking torque when closed. The yaw system is configured to transition from a yawing state to a parked by brake state by closing mechanical brakes in a first subset of the mechanical brakes and opening each mechanical brake in a second subset of the mechanical brakes. The second subset provides a second amount of braking torque that is less than the first amount of braking torque. In response to detecting a rotation of the nacelle while in the parked by brake state, the yaw system is configured to transition from the parked by brake state to a parked by motor state in which yaw drives are activated to provide a counter acting torque in opposition to the detected rotation of the nacelle.

The invention belongs to the field of fan control, and particularly relates to a fan yaw automatic control method and system based on dynamic deviation tracking, and the method comprises the steps: collecting real-time operation parameters through a sensing device and a monitoring system configured by a fan; screening and standardizing the real-time operation parameters to form a yaw control analysis data set; decomposing the yaw deviation by adopting a deviation decomposition algorithm to obtain a steady-state deviation component and a dynamic fluctuation deviation component; inputting the real-time operation parameters into a power loss analysis model, outputting a power loss sensitivity coefficient, and calculating a deviation correction angle as a dynamic correction instruction; and the dynamic correction instruction is issued to a fan yaw driving system, the cabin is controlled to adjust the orientation according to the deviation correction angle, and safety monitoring is carried out based on cabin load data. According to the method, the problems of insufficient yaw control precision and more yaw related power loss caused by the fact that steady-state deviation and dynamic fluctuation deviation are not distinguished in traditional fan yaw control are solved.

The utility model discloses a yaw driving hoisting tool for a wind generating set. The yaw driving hoisting tool comprises a first portal frame, a second portal frame, a first hoisting beam, a second hoisting beam, a third hoisting beam and a pulley, the first portal and the second portal are fixed to the top of a bearing seat and the top of a gear box elastic support of the wind generating set respectively. The first hanging beam is arranged on the top of the first portal, the top of the second portal and the top of the cabin support in a striding mode. The second hanging beam spans the top of the cabin support, one end of the second hanging beam is close to a cabin object hanging opening, and the other end of the second hanging beam is located beside the first hanging beam; the third hanging beam is fixed to the top of the first portal, one end of the third hanging beam intersects with the first hanging beam, and the other end of the third hanging beam extends to the position above the yaw drive installation position. And pulleys are respectively arranged on the bottom surfaces of the first hanging beam, the second hanging beam and the third hanging beam. The yaw driving device can effectively solve the problems that the distance between a cabin object lifting opening and a yaw driving installation position is long, the internal space of a cabin is narrow, and the yaw driving weight is heavy, so that the yaw driving is inconvenient to lift.

The invention provides a wind power generation visualization teaching aid and method based on wind direction and wind speed real-time perception, and belongs to the technical field of teaching aids and wind power generation. The method is realized based on a visual teaching aid, and the visualization method comprises the following steps: 1, establishing a coordinate system and a data reference, initializing the teaching aid, collecting environmental parameters, and filtering the environmental parameters to obtain actual wind speed data; secondly, real-time wind direction following of the wind driven generator is achieved through a yaw driving module, and wind direction tracking and yaw adjusting control are carried out; 3, calculating wind energy and power generation efficiency; 4, performing visual display and data synchronous updating; and 5, system state monitoring and exception handling are carried out. According to the invention, real-time detection of wind direction and wind speed, autonomous yaw adjustment of the wind driven generator and dynamic calculation of wind energy and power generation efficiency are realized in combination with a plurality of modules, and the wind power generation process is clarified through visual display of multiple dimensions, so that the interaction of the teaching process is enhanced.

This invention relates to a method for controlling the yaw of a wind turbine system by controlling multiple yaw drive actuators. Based on a requested motor speed reference as an input signal and an average motor speed reference as a feedback signal, the method determines a desired motor torque reference as the output signal for the multiple yaw drive actuators. The multiple yaw drive actuators rotate the nacelle or a structure comprising multiple nacelles, thereby providing a uniform load distribution to the multiple yaw drive actuators.

The invention discloses a yaw driving system and method for a wind turbine generator. The yaw driving system comprises a PLC control unit, a frequency converter driving loop, a soft start driving loop and a yaw motor. An interlocking logic control mechanism is arranged in the PLC control unit; the frequency converter driving loop is used for performing speed regulation control on the yaw motor; the soft start driving loop is used for driving the yaw motor to operate when the frequency converter driving loop fails; a contactor KM1 is configured in the frequency converter driving loop, a contactor KM2 is configured in the soft start driving loop, and the contactor KM1 and the contactor KM2 jointly form an interlocking switching component; and the PLC control unit outputs a control signal by acquiring the working states of the contactor KM1 and the contactor KM2 in combination with an interlocking logic control mechanism so as to drive the interlocking switching component to act. The problem of single-point failure of a single-frequency-converter driving scheme is effectively solved, and the reliability of a yaw system and the unit availability rate are improved.

This invention relates to the field of wind power generation equipment, and in particular to a wind turbine yaw drive control system, control method, and wind turbine generator. The wind turbine yaw drive control method calculates the yaw speed based on the rotational speed of the yaw motor, and controls the yaw process based on the obtained yaw speed. When the yaw speed exceeds a first set value, yaw is stopped and restarted after a set interval. If yaw fails after at least one restart, the wind turbine generator is shut down. When the yaw speed exceeds a safety threshold, the wind turbine generator is directly shut down. The first set value is greater than the maximum allowable yaw speed for normal wind power and less than the safety threshold. This invention can accurately control the wind turbine yaw process, and the entire process only requires setting the corresponding threshold, making the implementation extremely simple. This solves the problem of complex control of wind turbine yaw drive in existing wind turbine yaw drive control methods.

The invention discloses a fan yaw device braking system which comprises a tower drum, a yaw device gear, a yaw drive and a machine head bin, the rotatable machine head bin is installed on the top of the tower drum, the yaw drive is arranged in the machine head bin, the yaw device gear installed with the yaw drive in a transmission mode is installed in the tower drum, and a generator, a gearbox and a transmission shaft are installed in the machine head bin. The wind driven generator is characterized in that a connecting assembly capable of controlling the machine head bin to ascend and descend is further installed between the tower drum and the machine head bin. According to the fan yaw device braking system, the brake set can make contact through the gravity of the machine head bin to achieve orientation of the machine head bin, the mode that the brake clamps the annular brake disc to lock the direction of the machine head bin is matched, the oil pressure supply pressure of an oil cylinder of the brake can be reduced, the service life of the brake is prolonged, and the oil leakage risk of the oil cylinder of the brake is reduced.

Method for replacing an installed yaw ring (1) of a wind turbine (2) with a replacement yaw ring (3) in which, in an initial state of the wind turbine (2), a base frame (4) of the wind turbine (2) is pivotally mounted to an uppermost section (5) of a tower (6) of the wind turbine (2) to which the installed yaw ring (1) is mounted, and at least one yaw drive (7) of the wind turbine (2) engages the mounted yaw ring (1) to rotate the base frame (4) relative to the uppermost section (5) when operating the yaw drive (7), the method comprises the following steps: lifting a module (8) of the wind turbine (2) comprising a base frame (4), an uppermost section (5) and a yaw ring (1) mounted from a tower pile (9) of the tower (6) formed by at least one further section (10-12) of the tower (6) and placing the module (8) in a maintenance position (13); detaching a sub-module (17) of the module (8) comprising the base frame (4) from the uppermost section (5) and moving the sub-module (17) to a holding position (18); removing the installed yaw ring (1) from the uppermost section (5); mounting the replacement yaw ring (3) to the uppermost section (5); re-attaching the sub-module (17) to the uppermost section (5) to form a refurbished module (19) comprising the base frame (4), the uppermost section (5) and the replacement yaw ring (3); and lifting the refurbished module (19) onto the tower pile (9).

The invention discloses a wind driven generator control method and system based on dynamic yaw optimization, and relates to the technical field of wind driven generator set control, and the method comprises the steps: carrying out the measurement of the wind speed and the wind direction of a look-ahead measurement point in front of a fan through a laser radar installed on a cabin of a wind driven generator, and obtaining look-ahead wind information, the current yaw angle, the current wind speed, the generator power output and the cabin acceleration of the wind driven generator are obtained in real time, the target yaw angle of the wind driven generator in the prediction time window is predicted based on the look-ahead wind information, the current yaw angle, the current wind speed, the generator power output and the cabin acceleration, and the target yaw angle is calculated according to the target yaw angle. And generating a yaw control instruction, and sending the yaw control instruction to a yaw driving system so as to enable the wind driven generator to perform advanced wind facing control. By means of the mode, the technical problems that in the prior art, due to yaw control response lag, the wind energy capturing efficiency is low, and the unit load is large are solved.

The present disclosure relates to methods (100, 200, 300) for controlling a wind turbine (10) during a yaw operation. The present disclosure further relates to control systems (92) for wind turbines and to wind turbines (10). A method for operating a wind turbine (10) during yaw operation comprises operating one or more yaw drives (35) to rotate the nacelle (16) with respect to the tower (15). In addition, the method comprises predicting an end of the yaw operation and, in response to predicting an end of the yaw operation, actuating a hydraulic brake (94) before the predicted end.

The present application relates to the field of wind power generation technology, and more particularly to a wind turbine yaw brake system and a wind turbine. The wind turbine yaw brake system comprises a tower, a yaw flange, a nacelle, a yaw bearing, a yaw drive unit, a first brake assembly and a second brake assembly. The nacelle is rotatably connected to the yaw flange through the yaw bearing. The yaw drive is connected to the yaw flange or the nacelle, and the yaw drive unit is configured to drive the nacelle to rotate relative to the tower. The first brake assembly is connected to the yaw flange and configured to provide yaw damping when the yaw drive unit drives the nacelle to rotate relative to the tower. The second brake assembly is connected to the nacelle and configured to limit the rotation of the nacelle when the nacelle is stationary relative to the yaw flange. The wind turbine yaw brake system can achieve greater braking force, improve stability during yawing and in the stationary state, reduce wear during use of the system, and prolong the service life.

This application discloses a wind turbine control method and system based on dynamic yaw optimization, relating to the field of wind turbine control technology. The method includes: measuring wind speed and direction at a forward measurement point in front of the wind turbine using a lidar mounted on the wind turbine nacelle to obtain forward wind information; acquiring the wind turbine's current yaw angle, current wind speed, generator power output, and nacelle acceleration in real time; predicting the target yaw angle of the wind turbine within a prediction time window based on the forward wind information, current yaw angle, current wind speed, generator power output, and nacelle acceleration; generating a yaw control command based on the target yaw angle; and sending the yaw control command to the yaw drive system to enable the wind turbine to control the wind ahead of time. This method solves the technical problems of low wind energy capture efficiency and high turbine load caused by yaw control response lag in existing technologies.

A method is for controlling a wind turbine. The wind turbine has a tower, a nacelle, a rotor with at least two rotor blades and a yaw system with at least one yaw drive configured to rotate the nacelle about a vertical axis of the tower (yaw axis). A control signal for the at least one yaw drive depends on at least one signal indicative of the wind direction. The control signal for the at least one yaw drive further depends on at least one value indicative of a vibration mode of the rotor blades.

The application provides a wind power yaw system and a control method thereof. The wind power yaw system comprises a yaw controller, yaw drives and yaw motors. The number of the yaw drives and the yaw motors is multiple, and the yaw drives and the yaw motors are connected one by one. The yaw controller is connected with each yaw drive, controls each yaw drive to drive a yaw motor to work, acquires the torque and the speed of each yaw motor when working, compensates the torque and the speed of each yaw motor when working, and makes each yaw motor in a balanced state. The wind power yaw system and the control method thereof reduce the mechanical wear and failure rate of the unit, and improve the stability and reliability of the unit.

The present application relates to the technical field of risk analysis, in particular to a kind of offshore wind power project risk assessment method and system, comprising the following steps: according to the wheel hub height of offshore wind farm multi-unit, wind speed value is collected, and unit power, yaw angle change, vibration amplitude are obtained, and wind speed variation rate is calculated.In the present application, by combining blade vibration, yaw drive feedback and tower stress monitoring data, multi-source information cross analysis improves the calculation accuracy of unit load fluctuation rate, quantifies the influence of wind shear intensity, improves the risk prediction ability under the condition of wind speed rapid change, dynamically evaluates and optimizes the control of unit yawing accuracy, reduces the influence of long-term operation deviation on equipment stability, multi-dimensional data fusion calculates the unstable factors of unit operation state, comprehensively quantifies the influence of wind speed variation, load fluctuation and yawing error, perfects the risk assessment system, optimizes the risk assessment model of wind turbine generator, and improves the safety management level of offshore wind power project.

This invention belongs to the field of offshore wind power technology and relates to a yaw control method for floating wind turbines based on active attitude control and hydrodynamic coupling. It includes: acquiring the target yaw angle and actual yaw angle of the floating wind turbine and determining the yaw deviation; determining the target attitude angle of the floating wind turbine based on its actual attitude angle, water flow velocity, and wind load; adjusting the ballast distribution inside the floating wind turbine to achieve the target attitude angle; and generating a hydrodynamic yaw moment to drive the floating wind turbine's yaw motion by utilizing the hydrodynamic coupling effect generated by the interaction between the floating wind turbine and the surrounding water flow at the target attitude angle. This invention replaces traditional mechanical transmission or propellers with hydrodynamic power for yaw drive, eliminating parasitic energy consumption and mechanical wear; and actively controls the floating wind turbine's attitude through the ballast system to stimulate the hydrodynamic coupling effect, thereby achieving improved wind accuracy and reduced structural fatigue load in a low-cost and highly reliable manner.