27 results about "Pitch control" patented technology

The invention provides a method for controlling a pitch angle of a rotor blade (6) of a wind turbine (1) with a hydraulic pitch actuator system (200). The method comprises a step of receiving a current pitch signal of the rotor blade (6) and a pitch reference signal indicating a desired pitch angle for the rotor blade (6), a step of receiving an operating parameter signal (63) from the hydraulic pitch actuator system (200), a step of generating a feedback signal based on the operating parameter signal (63), a step of using a gain scheduler (150) to provide a variable feedback gain, a step of generating a damping signal based on the feedback signal and the variable feedback gain, a step of generating a pitch control command based on a difference between the current pitch signal and the pitch reference signal, and on the damping signal, and a step of sending the pitch control command to the hydraulic pitch actuator system (200).

This invention provides an automatic pitch calibration system for wind turbine blades. The system consists of a proximity switch installed at a preset mark at a mechanical 49° position at the blade root, with its centerline coinciding with the mark; a limit stop fixed at the blade root and moving with the blade through the proximity switch's sensing area; a pulse signal triggering module that generates a calibration pulse signal when the limit stop enters the sensing area; and an angle forced correction module that forcibly adjusts the rotary encoder angle in the pitch control system to the preset 49° mechanical position in response to the calibration pulse signal. The closest gap between the proximity switch and the limit stop is precisely set to 3mm, ensuring triggering accuracy while preventing mechanical collisions. The system triggers a calibration pulse signal once each during blade opening and closing to correct the rotary encoder angle in real time. The 49° mechanical position is used as an intermediate calibration point to eliminate accumulated angle errors. Furthermore, the system is integrated into the pitch control system, eliminating the need for an additional control unit.

The embodiment of the application provides a PLC variable-pitch control method and system based on deep learning, which acquires a blade angle calculated by PID and an optimal blade angle generated by DRL in parallel, uses a lightweight confidence network to evaluate the reliability of the DRL decision in real time, dynamically generates a fusion weight, and finally, intelligently weights and fuses the two control instructions based on the weight, and obtains a final blade angle instruction with the aid of a safety envelope. In this way, fine control can be achieved to optimize energy capture and limit load. When the DRL model confidence is low or faces an edge working condition, the system can adaptively and smoothly increase the weight of the PID controller, ensuring the stability and robustness of the control system.

This disclosure provides a method and system for collaborative compensation of yaw error in a pitch control system. It acquires the blade's bending moment matrix, azimuth angle, and macroscopic yaw error, and uses asymmetric load decoupling and quantization techniques to convert the blade load into fixed d-axis tilting moment and q-axis yaw moment components. Subsequently, these moment components are subjected to dual-channel PI control to generate d-axis and q-axis pitch compensation commands, and the yaw feedforward signal is cleverly extracted from the q-axis integral term. Finally, based on the azimuth angle, the d-axis and q-axis pitch compensation commands are fused with the collective pitch command to obtain independent pitch commands for each blade. These commands are then combined with the yaw feedforward signal and macroscopic yaw error for collaborative control and execution, thereby achieving deep collaboration between the pitch control and yaw systems. This approach more accurately reflects the rotor's stress state and enables refined compensation, effectively reducing fatigue loads on the blades and tower base.

A wind turbine pitch control system (10). The wind turbine pitch control system (10) comprises: a backup pitch control module (100), a switching module (200), and a primary pitch control module (300). When the primary pitch control module (300) fails, the switching module (200) is used for connecting a brake power output end (A1) of the backup pitch control module (100) to a motor side brake end (C1) of the primary pitch control module (300), and the switching module (200) is also used for connecting a motor power output end (A2) of the backup pitch control module (100) to a motor side power end (C2) of the primary pitch control module (300), so that the backup pitch control module (100) drives a motor (320) in the primary pitch control module (300) to control the position of blades. The wind turbine pitch control system (10) can drive the blades to continue grid-connected operation when the primary pitch control module (300) fails, thereby reducing the probability of blade jamming, improving safety performance of wind turbine generators, and further reducing power generation loss of the wind turbine generators. Further comprised is a wind turbine generator.

This invention belongs to the field of wind turbine generator condition monitoring technology, and in particular to a high-precision wind turbine blade pitch angle detection system and method. The high-precision wind turbine blade pitch angle detection system includes a video acquisition module, high-reflectivity markers, an integrated processing unit, and a digital output module. The video acquisition module is installed inside the turbine hub and includes a global shutter camera and a ring infrared light source. The high-reflectivity markers are fixed on the surface of the pitch bearing and are ceramic-based reflective patches. The integrated processing unit adopts a RISC-V main control chip and FPGA collaborative architecture. This invention accelerates image preprocessing and optical flow tracking through FPGA, and combines Kalman filtering to achieve 0.1 accuracy angle detection. The result is encoded into a 7+4 bit binary signal and transmitted to the PLC via an isolated CAN bus. It is particularly suitable for real-time dynamic deviation detection in high-vibration and wide-temperature-varying environments, and especially suitable for real-time pitch control of large-megawatt wind turbine generators.

The utility model discloses a plug connecting line for the variable pitch cabinet belongs to plug connecting line technical field, including main plug, the front side of main plug is connected with a plurality of connecting lines, and the front end of every connecting line all is connected with subplug, protection mechanism, protection mechanism includes the rectangular protection block of setting between main plug and a plurality of subplug, the front side of rectangular protection block is equipped with a plurality of first circular through slot, the upper end of rectangular protection block is equipped with the protection groove, and the front side inner wall of protection groove and the front side between rectangular protection block are equipped with a plurality of wire fixing groove. The equipment is to the use problem, sets up the protection mechanism, and through a plurality of wire fixing groove can realize the arrangement and fixed of a plurality of connecting lines, and cooperate protection groove and protection plate simultaneously, can accommodate the protection to a plurality of subplug, and then avoid a plurality of subplug from being damaged when not being used by external factors.

This utility model discloses an AC pitch control device, comprising three shaft control cabinets, one central control cabinet, and three battery cabinets. Each of the three shaft control cabinets houses three integrated AC drives, all electrically connected to the nacelle main controller. Each integrated AC drive integrates a pitch controller, a pitch driver, and a capacitor charger. The central control cabinet contains a first connection line and a second connection line. Each of the three battery cabinets houses three sets of supercapacitor modules, each electrically connected to one of the three integrated AC drives. Each of the three integrated AC drives is electrically connected to three AC permanent magnet synchronous motors. In this utility model, the integrated AC drive integrates the pitch controller, pitch driver, and capacitor charger, reducing the space occupied by the pitch controller and pitch charger within the central control cabinet, thereby reducing the overall installation space required.

This invention discloses a wind turbine pitch control method based on quantum optimization and neural differential equations, belonging to the field of wind turbine pitch control technology. This method integrates a quantum hybrid optimizer, a neural differential equation (NDE) dynamic model, and an edge-quantum cloud collaborative control architecture. Real-time data is collected through edge devices, and the hidden state of the NDE model is initialized via an encoder network. Latin hypercube sampling of pitch angle combinations is used as input to the NDE model to predict the wind turbine's dynamic response. Based on the prediction results, a total objective function is constructed, fitted with a QUBO matrix, and then the optimal pitch angle is solved by a quantum processing unit through quantum annealing. The quantum cloud platform periodically fine-tunes the model and updates the parameters. This invention achieves millisecond-level real-time control, improves the model's generalization ability and adaptability to complex wind fields, smooths power fluctuations, reduces blade load, and balances wind energy capture efficiency and wind turbine lifespan.

The application provides a floating wind turbine nonlinear model predictive control variable pitch load reduction method and system, and belongs to the technical field of deep-sea wind power generation control. The method comprises the following steps: obtaining wind turbine state quantity measurement data and historical control input data, constructing a nonlinear candidate function library, solving a coefficient matrix, and constructing an SINDy prediction model capable of representing sparse nonlinear dynamics of the system; the system matrix is loaded into the controller as an internal prediction model, and a future wind speed sequence is input into the controller as a known disturbance; in the controller, the SINDy prediction model and a multi-objective optimization function are used to predict and rollingly optimize the system output in a future time domain under the premise of meeting the physical constraints of the system, and the optimal independent variable pitch control quantity at the current time is calculated; the output of a variable gain PI controller of the unified variable pitch part is calculated, and is superimposed with the optimal independent variable pitch control quantity at the current time to form a complete control signal, which is transmitted to the wind turbine as a pitch angle reference.

The utility model belongs to the technical field of the structure of the wind instrument, specifically relates to an improved saxophone bend neck joint. The cavity that the body built -in supplies gas to circulate, one end of the body is equipped with the interface for connecting with flute head, the other end is equipped with the spigot connected with the main part, the interface front end is equipped with the transition section that is inwardly bevelled, the cross -section size of the airflow cavity at the transition section gradually reduces from outside to inside, constitutes a conical or arc gas circulation buffer zone. Compared with prior art, the utility model has the beneficial effects that: the transition section is arranged on the inner side of the interface, effectively guides the smooth transition of airflow, reduces the turbulence and air resistance; the inwardly connected place of the transition section is arc transition structure, the cavities are smoothly connected, the gas circulation smoothness is increased; the rigid beam structure is increased at the bending part, the joint stability and durability are significantly improved; on the basis of maintaining the compatibility of the original joint, the overall performance is improved; the airflow feedback and the pitch control ability are optimized, especially suitable for the environment of frequent disassembly and high -intensity performance.

The application relates to the technical field of wind power generation, in particular to a tower vibration suppression method and device, wherein the method comprises the following steps: constructing a vibration second-order dynamic model for describing a tower vibration state, determining a tower vibration influencing factor according to the vibration second-order dynamic model, determining a unified variable pitch loop control component and an independent variable pitch loop control component for suppressing tower vibration and superimposing the two components to generate a total variable pitch loop control quantity, controlling a target wind turbine to execute a variable pitch control instruction corresponding to the total variable pitch loop control quantity, adjusting an actual pitch angle of the target wind turbine to a total pitch angle corresponding to the superposition, and suppressing the tower vibration state to meet a target requirement. The application can effectively suppress the tower first-order natural frequency component in the front and rear vibration of the tower and the low-frequency vibration component synchronized with the wind wheel rotation frequency, and realizes power tracking and vibration suppression of the front and rear directions of the tower.

This invention constructs a sliding mode surface by superimposing the pitch angle error signal, the pitch rate signal, and the nonlinear piecewise integral signal of the error. A second-order nonlinear error coupling filter is then designed to obtain the first-order and second-order output signals of the sliding mode filter. These are then superimposed through error coupling to obtain a hybrid differential signal of the second-order sliding mode surface. By superimposing equivalent control terms and adaptive disturbance estimation terms, the desired value of the main motor armature voltage is calculated using second-order sliding mode control. Then, using an inversion design approach, the desired armature voltage rate signal is gradually obtained by integrating the piecewise coupled pitch angle error signal. Finally, the helicopter pitch control signal is obtained through equivalent voltage and error feedback and inversion calculation, and then sent to the main motor, thus realizing attitude tracking control of the helicopter pitch channel.

A pitch controlled wind turbine has a tower, a nacelle mounted on the tower, a hub rotatably mounted on the nacelle, and at least three blades. The wind turbine comprises at least three blade connection members, each extending between adjacent blades. The wind turbine has at least three pretension members, each connected to one of the blade connection members and connected to the hub via a tensioning device providing radial movement of the pretension member as a result of extension / retraction of the tensioning device, each pretension member thereby providing pretension in its connected blade connection member. A de-icing system is coupled to one or more of the tensioning devices and configured to control extension or retraction of the one or more tensioning devices in order to energize at least some of the wind turbine blades, blade connection members and / or pretension members in order to remove ice therefrom.

This invention discloses a coupling device for an AC asynchronous servo motor used in wind power pitch control, relating to the field of wind power generation. It includes an asynchronous motor, with a main coupling fixedly connected to the output end of the asynchronous motor. The outer surface of the main coupling is respectively provided with guide components and adjusting components. One end of the main coupling is fixedly connected to a connecting plate, and the outer surface of the connecting plate has a guide groove. This invention utilizes the guide groove on the outer surface of the connecting plate in cooperation with a sliding rod, allowing two arc-shaped plates to slide flexibly along the guide groove. When dealing with AC asynchronous servo motor output shafts and pitch control input shafts of different sizes, the positions of each component can be finely adjusted according to the actual size of the shaft, adjusting the position of the arc-shaped plates in the guide groove. Then, a locking pin passes through a perforated block and a perforated square plate for fixation. For motors with larger output shaft diameters, the arc-shaped plates are slid outwards to accommodate the installation requirements of larger shafts.

This disclosure provides a method and system for detecting communication anomalies in a wind turbine pitch control system. First, the original CAN message stream is processed into a time series, extracting multiple inter-frame arrival time sequences. Then, the wind turbine's operating condition is determined in real-time using SCADA data, generating an operating condition time series. Further, an adaptive time series decomposition is used to combine the inter-frame arrival time sequences and the operating condition time series. Before decomposition, a logarithmic transformation is performed on the data, effectively addressing the inherent shortcomings of traditional additive model time series decomposition in handling heteroscedasticity, thus obtaining multiple variance-stable residual sequences. Finally, a pre-trained isolated forest model is used to score these residual sequences for anomalies, and the cumulative evaluation of anomaly scores combined with state judgment outputs the health status of the wind turbine pitch control system. This approach significantly improves the accuracy and robustness of communication anomaly detection in wind turbine pitch control systems.

A method is provided for installing a continuous flexible add-on device (e.g., a vibration suppression device) on a wind turbine blade, where the blade is mounted on a rotor located at the top of a tower. The method includes positioning the blade in a first position relative to the rotor. One end of the add-on device is attached to one end of the blade. The blade is then rotated using a pitch control system while the add-on device is supplied in a first direction along the rotating blade so that the add-on device wraps around it to a second opposite end of the blade following a first wrapping pattern.

This invention discloses a fault-tolerant compensation and control method for pitch wind turbines based on multi-blade coordinate transformation, belonging to the field of wind turbine control technology. The specific steps include: obtaining a basic pitch control signal based on real-time operating parameters of the wind turbine through a unified pitch control algorithm and an independent pitch control algorithm; obtaining a fault-tolerant compensation control signal based on real-time collected blade root bending moments and rotor deflection angles through multi-blade coordinate transformation; and superimposing the two types of signals to generate a final pitch control signal, driving the pitch actuator to adjust the blade pitch angle. This invention can effectively address pitch actuator failures, ensure stable wind turbine operation, and improve power generation quality and equipment safety.

This disclosure provides a hydraulic pitch control system and a wind turbine generator set. The hydraulic pitch control system includes: a pitch cylinder; a motor-pump assembly connected to the pitch cylinder, including a motor and a pump connected to the motor, and controlling the extension and retraction speed of the pitch cylinder by controlling the speed of the motor; and an accumulator assembly connected to the motor-pump assembly to provide hydraulic oil required by the wind turbine generator set in emergency feathering conditions, wherein the motor-pump assembly controls the normal pitch opening and retraction of the wind turbine generator set and provides initial oil supply to the accumulator assembly.

This invention relates to the field of electroacoustic musical instrument technology, specifically to an electronic guqin playing system and audio simulation method based on simulated trigger synthesis. The system includes: vibrating strings, pressing strings, and an overtone switch; determining the string height and amplitude as trigger parameters based on the vibration signal; converting the pitch parameter based on the damping position signal; and finally synthesizing and outputting simulated audio based on the trigger parameters, pitch parameter, and overtone trigger signal. Addressing the problem that the timbre of existing electronic guqins is still constrained by the characteristics of the strings themselves, this invention decouples the string triggering from the pitch control principle. The vibrating string module is only used to collect the vibration signal when the corresponding string is triggered, the pressing string module is used to collect the pressing position of the corresponding fret on the string, and the overtone part has an independent overtone switch. Finally, the processing module synthesizes the actual simulated audio for playback, achieving a higher degree of freedom in timbre synthesis and avoiding the influence of string vibration characteristics on timbre.

This disclosure provides a wind turbine pitch control method and system. By fusing multi-source sensitive signals such as blade root bending moment and nacelle tower top acceleration, a feature vector capable of real-time characterizing the wind turbine's operating status is constructed, thereby enabling early and accurate identification and severity assessment of extreme gust events. Based on this early warning information, the control system can make intelligent decisions, maintaining efficient and stable PID control under normal operating conditions. Once a gust threat is identified, it immediately switches to emergency control mode and decisively executes a rapid and large-amplitude feedforward pitch command matched to the gust level. This approach allows control actions to be completed before severe speed overshoot and extreme load formation, transforming the control logic from reactive compensation to proactive suppression, effectively ensuring the safe operation of the unit under severe wind conditions.

The present disclosure provides a pitch control method, a vehicle, an electronic device and a medium, aiming to solve the problem that effective pitch control cannot be performed in the related art. The method comprises: determining a parameter of an electromagnetic suspension of the vehicle according to a target driving force; and controlling the electromagnetic suspension to adjust a pitch angle of the vehicle based on the parameter.

The application provides a floating wind turbine variable pitch load reduction control method and system, and belongs to the technical field of offshore wind power control, and comprises the following steps: updating a priori Gaussian model based on the real-time operation state of a floating wind turbine to obtain a posteriori Gaussian model, the posteriori Gaussian model outputs a system future state prediction trajectory; constructing a cost function based on the system future state prediction trajectory, and screening a plurality of groups of variable pitch control trajectories with the best performance in the current iteration period under the condition of meeting physical and operation constraints; obtaining a global optimal control sequence by iteratively optimizing the plurality of groups of variable pitch control trajectories by using a cross-entropy method; and extracting the first component of the global optimal control sequence as a current variable pitch instruction based on the rolling horizon control principle, and entering the next control cycle after the variable pitch instruction is executed. The application realizes efficient closed-loop control of the complex dynamics of the floating wind turbine.

The application provides a bending device and method for a heat exchanger coiled pipe, which decomposes the heat exchanger coiled pipe, and decomposes the whole structure into a body spiral part and two end bending parts; a spiral bending device is designed to meet the bending of the body spiral part of the coiled pipe; a pipe end bending device is designed to meet the bending of the pipe end part of the coiled pipe; the spiral bending device comprises a pipe bending unit, an inlet and outlet angle control unit and a pitch control unit, the pipe bending unit implements the bending of the body spiral part of the coiled pipe, the inlet and outlet angle control unit controls the forming angle of the two end bending parts of the coiled pipe, and the pitch control unit controls the pitch of the body spiral part of the coiled pipe. The bending device is adopted to solve the problems of the heat exchanger coiled pipe, such as difficult forming, difficult cleaning of the inner cavity filler, long manufacturing test period of the special mold, poor forming precision of the coiled pipe and the like.

A pitch controlled wind turbine has a tower, a nacelle mounted on the tower, a hub rotatably mounted on the nacelle, and at least three blades. The wind turbine comprises at least three blade connection members, each blade connection member extending between adjacent wind turbine blades. The wind turbine has at least three pretension members, each pretension member being connected to one of the blade connection members and being connected to the hub via a tensioning device providing radial movement of a radially inner end of the pretension member relative to an axis of rotation of the hub due to extension / retraction of the tensioning device, each pretension member thereby providing pretension in the blade connection member to which it is connected. An anti-icing system and / or de-icing system is provided for protecting one or more of the blade connection members, the pretension members, the connection points or the tensioning devices.

This application relates to a pitch control system, method, electronic device, storage medium, and program product. The slave motor control module in this system includes: a voltage loop configured to generate a first speed compensation value for the slave motor based on a feedback value of the slave motor's bus voltage and a given reference value of the slave motor's bus voltage; a speed loop configured to generate a current reference value for the slave motor based on the first speed compensation value, the speed feedback value, and the speed reference value; wherein the speed feedback value and the speed reference value are speed samples from the slave motor at different times; and a current loop configured to control the operation of the slave motor based on the current feedback value and the current reference value. This application, through improvements to the slave motor control module and control method, enables the slave motor to achieve independent control without relying on the communication network within the master and slave motors, while still achieving the cooperative control function of the master and slave motors.