359 results about "Offshore wind power" patented technology

This invention discloses a vibration-damping pile foundation for offshore wind power equipment installation, relating to the field of wind power equipment technology. The invention includes a platform base, with a stabilizing column installed at the bottom and a reinforcing column installed at the top. A base column is positioned at the top of the reinforcing column, and a connecting assembly is positioned at the bottom of the base column. Through the cooperation of the structural damper in the connecting assembly and the telescopic column and piston rod in the damping assembly, this invention can adaptively adjust the buffering direction when the pile foundation is subjected to multi-directional vibrations, significantly improving the response accuracy and reliability of the vibration damping system. Through the synergistic action of the turbine blades, shaft, gear set, and generator in the kinetic energy transmission assembly, the hydraulic energy of the flowing oil is converted into mechanical energy and ultimately used for power generation and recovery, achieving efficient utilization of vibration energy. Simultaneously, the oil flow resistance and the generator electromagnetic resistance together constitute a damping effect, simultaneously enhancing the vibration damping effect during power generation, thus balancing structural stability and energy reuse.

The application discloses a kind of offshore wind farm automatic power generation control flow field dynamic modeling methods, comprising the following steps: data sampling is carried out using CFD simulation, obtains data set;Data is collected and arranged;Eigen-orthogonal decomposition is used for order reduction processing;Offshore wind farm automatic power generation control flow field dynamic model based on yaw, variable pitch, speed regulation process and its disturbance process is constructed.The application can effectively overcome the shortcomings that the data set obtained by high-precision wind farm flow field dynamic simulation is large in structure and difficult to apply directly, and the dynamic reduced-order model of the wind farm flow field obtained can greatly compress the data structure, retain the main characteristics of the flow field, and has high wake prediction accuracy.

The application discloses a kind of offshore wind power bearing heterogeneous material multi-field construction forming method, the contact surface of the inner ring and outer ring of offshore wind power bearing is sealed welding to obtain bearing ring blank, the bearing ring blank is hot-rolled, and bearing ring piece is prepared by synchronously applying pulse current during the hot-rolling, wherein the inner ring and outer ring are two different materials.The surface of the wind power bearing prepared by the application is copper alloy material, which has good corrosion resistance and abrasion resistance, the core is traditional alloy steel material, which has good strength and impact toughness, the heterogeneous interface also realizes mechanical combination and metallurgical combination, and finally obtains excellent comprehensive performance, which helps to realize the high-performance and low-cost manufacturing of wind power bearing heterogeneous material.

The application discloses a kind of offshore wind turbine pitch control methods based on predefined time adaptive dynamic programming, comprising: establishing single-pile offshore wind power generator full coupling mathematical model;The single-pile offshore wind power generator full coupling mathematical model includes the motion equation of system and the mathematical model of double-mass transmission system;Using the mathematical model of double-mass transmission system constructs rotor speed tracking error, adopts error adjustment method to process the non-affine characteristic of system, obtains the nonlinear affine model of single-pile offshore wind power generation system in combination with motion equation;The control strategy is constructed as the infinite time domain optimal performance index function of the change of pitch angle;Using predefined time nonlinear disturbance estimator estimates disturbance term in nonlinear affine model;To the equivalent form of Hamilton-Jacobi-Bellman equation of infinite time domain optimal performance index function, the approximate optimal control method based on only evaluation type neural network is used to solve equation to obtain optimal control strategy.

This invention discloses a PIDNN-SO-based method for optimizing the layout of offshore wind farms, belonging to the field of wind farm optimization design technology. The method first inputs wind farm, turbine, and wind resource parameters, sets constraints on turbine spacing, boundaries, and wake overlap rate, and constructs a high-precision wake flow field physical model based on actuator disk theory, Navier-Stokes equations, and a weighted quadratic wake superposition model. Secondly, it builds a physical information dual neural network (PIDNN) with dual encoders, integrating physical equation loss and data loss to train the model, achieving rapid and accurate prediction of wake wind speed. Then, it uses the snake optimization algorithm (SO) to optimize the environmental evolution factor, completing an efficient search for turbine layout. Finally, it constructs a PIDNN-SO collaborative optimization framework, trains a PIDNN surrogate model through initial sampling, and outputs the optimal layout that maximizes annual power generation. This invention can effectively reduce wake loss and significantly improve the power generation efficiency of offshore wind farms.

This invention relates to the field of wind power output prediction technology, and particularly to a method, system, device, and storage medium for predicting offshore wind power output change windows based on typhoon forecasts. The method includes acquiring deterministic typhoon forecast data; calculating the time-series wind speed at the turbine hub height of the target offshore wind farm within the future forecast period based on a preset typhoon parameter model; setting a feathering shutdown wind speed threshold and a power generation recovery wind speed threshold for the turbines; traversing the time-series wind speeds to obtain the predicted shutdown start point and the predicted power generation recovery point, marking the period between the predicted shutdown start point and the predicted power generation recovery point as the initial output change window period; based on the initial output change window period, backtracking to verify the persistence of the upward trend of wind speed before the predicted shutdown start point to determine the precise start point of the window period; and extending backward to verify the stable recovery trend of wind speed after the predicted power generation recovery point to determine the precise end point of the window period.

This utility model discloses a bearing ring for offshore wind power generation, relating to the field of wind power generation, comprising a lower bearing body and an upper bearing body. This utility model, through the arrangement of the lower bearing body, upper bearing body, and balls, connects the entire bearing ring via the lower and upper bearing bodies. This multi-layer assembly improves the overall strength of the bearing ring. Simultaneously, a sealing sleeve at the connection point protects the lower and upper bearing bodies, enhancing the sealing performance and strength of the bearing ring. The lower bearing body and anti-corrosion coating, applied to the surfaces of both the lower and upper bearing bodies with hot-dip galvanized coating, provide excellent corrosion and wear resistance, offering long-term effective protection for the bearing ring. Furthermore, the technology is mature and relatively low-cost, making it suitable for corrosion protection of offshore wind power bearing rings.

This invention relates to a voltage limiting control method for a series-type offshore wind power DC collector system, comprising: superimposing a low-voltage DC link voltage control loop on the power control loop of the wind turbine generator-side converter, and obtaining a reference value for the d-axis component of the generator-side converter voltage. umsd_ref and q-axis component reference value umsq_ref The control signal for the generator-side converter is generated through sinusoidal pulse width modulation to maintain stable low-voltage DC link voltage while ensuring stable power output. The grid-side converter of the wind turbine adopts voltage / frequency control to obtain the d-axis reference value of the grid-side converter output voltage. uod _ ref and q-axis reference value uoq _ ref The grid-side converter control signal is generated by sinusoidal pulse width modulation. By setting the d-axis setpoint of the grid-side converter output voltage, the AC output voltage of the grid-side converter is limited, thereby controlling the DC output voltage of the wind turbine generator within the limit value.

The application provides a state monitoring method and system for offshore wind farms, which is based on meteorological satellite monitoring data of the sea area where the offshore wind farm is located to determine the corresponding environmental state information of the sea area, so as to determine all target power generation wind turbines that may have fault events inside the offshore wind farm; based on the distribution position information of all target power generation wind turbines, directional radar scanning is performed on the corresponding area inside the offshore wind farm to obtain radar echo data of the corresponding area, so as to identify abnormal power generation wind turbines that stop power generation operation inside the offshore wind farm; and based on real-time power generation state data of all power generation wind turbines inside the offshore wind farm that maintain power generation operation, power generation wind turbines that are not in a full load state are identified, and the power generation wind turbines that are not in a full load state are adjusted in working state in combination with power adjustable capacity information and environmental state information of the corresponding power generation wind turbines, so that the offshore wind farm can maintain stable and continuous power transmission to the outside in the case of power generation wind turbine failure.

The present application relates to the technical field of power system relay protection, and particularly relates to a kind of offshore wind power through flexible low-frequency transmission system sending out line protection method, offshore wind farm is connected with modular multi-level matrix converter after being sent out by low-frequency through booster transformer, and is incorporated into large power grid after being frequency converted by M3C. When M3C of offshore wind farm fails, negative sequence current suppression and positive sequence current limiting strategy are adopted for fault ride-through, and relay protection devices are installed at both ends of low-frequency sending out line and communicate. The current sampling values before and after the fault on both sides of the line are reconstructed in phase space, and the difference between the permutation entropies is used to construct a protection scheme, which overcomes the problem of sensitivity reduction of traditional current differential protection for sending out line, reduces the amount of data interaction, and reduces the pressure of protection communication and the requirement of data synchronization. It is not affected by the control strategy of wind turbine and modular multi-level matrix converter at both ends of the line, fault ride-through mode, transition resistance and fault location, and has high reliability and good speed.

This invention relates to the field of wind power generation technology and discloses a method, device, equipment, and medium for fault assessment of wind turbine transmission systems. The method utilizes a data dimensionality reduction algorithm to reduce the dimensionality of multidimensional raw data, retaining core distinguishing features and simplifying calculations. Then, a data clustering algorithm is used to intelligently classify operating states, and a preliminary fault mode mapping is constructed by combining historical faults. Subsequently, the rationality of clustering is verified using signal source correlation coefficients, and long-term historical operating data is filtered through historical data matching rates to reduce the risk of misjudgment. Next, based on time series analysis and degradation path analysis, the coupling relationship between vibration trend slope, temperature accumulation offset, and torque decay cycle is obtained. Finally, core features are extracted through convolutional neural networks to accurately output the probability distribution and specific location of fault occurrence, thereby improving the accuracy of fault identification in the transmission system of offshore wind turbines and the ability to predict component performance degradation.

This invention discloses a design method for a floating platform for offshore wind power generation, within the technical field of offshore wind power generation and floating platform design. The method includes the following steps: S1 theoretical numerical simulation analysis; S2 scaled-down model manufacturing; S3 experimental system construction; S4 system safety check and debugging; S5 setting experimental environment parameters and sampling parameters; S6 starting the experiment and controlling the control device to simulate target sea conditions; S7 measuring platform performance and adjusting platform control parameters to obtain optimal performance; S8 collecting platform response data under different combinations of environmental parameters; S9 planning and executing multiple sets of experiments using orthogonal experimental design methods and optimizing platform design parameters; S10 analyzing and processing the experimental data and optimizing the numerical model and platform design based on the analysis results. This invention starts with platform structural design, with simple optimization steps and easy operation, applicable to the design and optimization of floating platforms under different sea conditions, providing reliable verification for offshore wind power generation.

The application provides a low-light tip defect recognition method based on an attention-enhanced network, and belongs to the technical field of offshore wind turbine fault diagnosis, and comprises the following steps: S1: using a UAV to shoot a plurality of offshore wind turbine pictures containing a tip to form an original data set; S2: preprocessing the original data set, filtering pictures that do not meet the requirements, and arranging and sorting suitable pictures to form a structured original data set; S3: using a noise adding algorithm to add random noise to a single picture in the data set to enrich sample categories under different light conditions; S4: using the data set after adding noise for model training of the attention-enhanced network until a model meeting the accuracy and speed requirements is obtained; and S5: applying the mature model to engineering practice to finally form a complete low-light tip defect recognition method based on the attention-enhanced network.

The application discloses a kind of sea-land coordination optimization planning method and equipment for offshore wind power construction timing, which comprises the following steps: constructing sea-land coordination planning network; divided into multiple planning stages according to construction timing; enter the current stage; the materialized implementation topology of previous stage is used as the basis network, the onshore construction decision is closed, the timing analysis is executed, and the pressure index is extracted; the restricted candidate corridor set is obtained by screening according to the pressure index score; the loop construction variable is opened and returned, and the construction package is obtained by optimizing with the offshore transmission scheme; the construction package is written back to the basis network to form the materialized implementation topology and perform independent checking; the topology that passes the checking is used as the basis network of next stage, and the above steps are repeated until the whole planning is completed. Based on the method, a sea-land coordination optimization planning equipment for offshore wind power construction timing is also proposed. The application can compress the candidate scale, improve the solving efficiency and engineering implementability, and directly map the optimization result to the line construction package.

The application discloses a kind of wind farm power collection system topology design method and system based on improved genetic algorithm, it is related to system topology design technical field, to solve the core problem of wind turbine grouping and submarine cable connection collaborative optimization under high-dimensional constraint, accurate matching of load flow and cost.The method determines the maximum number of wind turbines and the number range of feeder by parameter calculation module simultaneous equations, grouping connection module constructs initial scheme by polar grouping combined with minimum spanning tree algorithm, cost modeling module calculates cost by exclusive function, iteration optimization module dynamically adjusts grouping and the number of wind turbines based on improved genetic algorithm, constraint screening module excludes illegal scheme by penalty formula, and finally generates optimal and suboptimal topology graph containing core parameters.The application divides high-dimensional optimization problem into layers, considers constraint satisfaction degree and economy, significantly reduces submarine cable investment cost, improves design efficiency and engineering feasibility, and is suitable for various offshore wind farm power collection system topology design.

The application discloses a scouring protection and active repair device for offshore wind power large-diameter single-pile foundation, relates to the technical field of offshore single-pile wind turbine foundation protection, and comprises a sand filtering and flow disturbing assembly and a scouring pit repair assembly, the sand filtering and flow disturbing assembly is arranged around the single-pile foundation to intercept and collect silt carried by sea current; wherein the scouring pit repair assembly comprises a lifting ring, a connecting rod and a silt scraping plate, the lifting ring is arranged on the outer wall of the single-pile foundation in a lifting and rotating mode, the silt scraping plate is connected with the lifting ring through the connecting rod, and the silt scraping plate pushes the silt collected by the sand filtering and flow disturbing assembly into the scouring pit under the driving of the lifting ring; and the application further comprises a monitoring assembly for monitoring the formation of the scouring pit around the single-pile foundation. The application integrates real-time monitoring, active repair and self-power supply functions, realizes sand filtering and flow disturbing, lifting and rotating silt scraping cooperative operation, accurately fills and resets the scouring pit, effectively inhibits the development of scouring, and significantly improves the safety and service life of the pile foundation.

The application discloses a kind of offshore wind power grouting material detection device and use method, belong to slurry detection device technical field, comprising: base and remote control terminal, the surface of the base is provided with detection mechanism, the surface of the base and the top of detection mechanism is provided with two installation shell, the surface of two installation shell is all installed with dust scraping mechanism, the top of installation shell and the two sides of dust scraping mechanism are all installed with image acquisition mechanism, the surface of the base is provided with height adjusting mechanism, the surface of the base is installed with battery, the top of battery is installed with communication sensor, the base includes first support seat and second support seat, and first support seat and second support seat are rotatably connected between them.The application can also be suitable for steel pipes of different sizes on the basis of realizing the detection of the surface of steel pipe, and the surface of steel pipe can be dusted before detection.

This invention provides a grid-connected energy storage system and a stable operation control method for offshore wind power off-grid operation. The system consists of multiple offshore wind turbines connected in parallel. Each turbine is connected to an AC collection submarine cable via a turbine-side DC / DC converter, a grid-side AC / DC converter, and then connected to the turbine-side AC bus via a grid-side transformer. The turbine-side AC bus transmits power to the AC grid through a flexible DC-DC transmission system, and also connects to an energy storage battery via a grid-connected energy storage converter. The flexible DC-DC transmission system includes an AC grid-side transformer, a turbine-side MMC converter station, an onshore MMC converter station, and a grid-side transformer. This invention combines an offshore wind power off-grid operation system with an energy storage system, utilizing the margin of the energy storage system to achieve grid-connected / off-grid switching for the offshore wind power system. The energy storage system smooths out power fluctuations caused by wind energy fluctuations, enabling off-grid operation of the system.

The present application relates to offshore wind power technology field, disclose a kind of floating offshore wind turbine model test mooring system simulation device and method, its device includes multiple mooring parts, each mooring part includes: multiple longitudinal telescopic rod is arranged in rectangular matrix at experimental pool bottom;Multiple transverse telescopic rod is respectively connected in the top of two adjacent longitudinal telescopic rod;Steel plate is horizontally arranged on transverse telescopic rod and is arranged on the magnetic suction chuck of steel plate surface;Anchor chain two ends are respectively connected with the fairlead of floating platform and magnetic suction chuck, and elastic section is provided at the place close to the fairlead of anchor chain;Tension sensor is arranged at the elastic section of anchor chain and the position of the fairlead of floating platform;The device and method can simulate the mooring system arrangement situation of floating offshore wind turbine in towing tank and the model water depth required by experiment, ensure the accurate reproduction of catenary mooring geometric similarity, mass similarity and dynamic similarity, provide technical support for floating offshore wind turbine model test.

This invention discloses a method for preparing a multifunctional graphite / iron powder / geotextile composite material, relating to multifunctional material technology. The preparation method includes the following steps: First, PU-2540 resin is stirred at 500 rpm for 10 minutes. Then, graphite, iron powder, and dispersant are added at 600 rpm over 4 hours. After the addition is complete, the stirring speed is increased to 800 rpm, and dispersion continues for 30 minutes. The prepared slurry is scraped onto geotextile, and then placed on a polytetrafluoroethylene film and allowed to stand at room temperature for 16 hours. After standing, the material is clamped on both sides into a stainless steel hot press mold and placed in the center of the lower platen of the hot press. The hot press is started, a certain pressure is applied and maintained constant, and then the upper and lower plates are heated simultaneously, and hot pressing is performed under this pressure and temperature. This invention achieves multifunctional integration of wave absorption, electrothermal properties, corrosion resistance, and UV protection, providing a lightweight and flexible integrated protective material solution for offshore wind turbine towers.

The utility model relates to offshore wind power engineering technical field especially relates to a kind of offshore wind power scouring prevention device, including sea wind pile foundation, energy storage component and water spraying component, the energy storage component is used to convert water flow energy into electric energy, the water spraying component is connected with energy storage component, the water spraying component is towards water flow direction and sprays water;The energy storage component and water spraying component are provided with multiple groups and are arranged around sea wind pile foundation;Mechanical energy of tidal current, wave around sea wind pile foundation is converted into electric energy, then electric energy is converted into water flow opposite to tidal current, wave and carries out energy dissipation, design is ingenious, with stronger engineering implementability.

This invention relates to the field of flexible DC transmission technology for offshore wind power, and discloses a method and system for collaborative optimization of control parameters of converter stations and wind turbine converters in offshore wind power flexible DC systems. The method includes: constructing an electromagnetic transient simulation model comprising a sending-end converter station, a receiving-end converter station, a DC transmission line, and a wind farm; introducing multiple disturbance conditions and combining variations in control parameters, recording dynamic response process data; establishing a collaborative optimization criterion composed of multiple performance indicators directly mapped from the dynamic response process data; and employing a multi-objective evolutionary optimization mechanism with control parameters as the variables to be optimized and performance indicators as the optimization guide for iterative search. This invention achieves global collaborative configuration of control parameters for converter stations and wind turbine converters, solving the problem of traditional step-by-step tuning methods neglecting dynamic interaction effects, and significantly improving the overall operational robustness of offshore wind power flexible DC systems under multiple disturbance conditions.

The application provides a method and system for offshore wind turbine integrated dynamic feature reservation. The full state time series data of the offshore wind turbine multi-physical field coupling system is obtained, the modal parameters of the system are extracted by using a dynamic modal decomposition method, the participation factor matrix is calculated, the participation degree of each state quantity and the corresponding physical link to each mode is quantified, the dominant state quantity of the extracted mode and the corresponding physical link are located, the dominant state set is constructed, the time scale distribution of each mode is quantified, the time scale distribution characteristic atlas of different physical links of the overall system is formed, the fast time scale, analysis time scale and slow time scale boundaries in the atlas are divided according to different research needs, and the offshore wind turbine integrated reduced order model is constructed based on the singular perturbation theory. The application can effectively reserve the dynamic features of the offshore wind turbine multi-field coupling characteristics, and provides a precondition and quantitative basis for physical-based model reduction modeling.

The application provides a kind of offshore wind power steel structure tower's semi-submersible transport method, comprising the following steps: S1, after tower production is completed, the both ends of tower are sealed, and pull hook is set;S2, slide is built on the coast, and parking point is set;S3, tower is transported to port, and transport car stops at parking point;S4, tower is moved to slide, and steel cable is used to connect the pull hook of the end of tower and tugboat;S5, the connected tower is dragged to sea surface by the slow movement of tugboat;S6, the tower is transported to the machine site by tugboat;Through the above steps, the tower of offshore wind power is transported to the machine site.The application eliminates the process of tower loading, adopts semi-submersible transport mode, increases the efficiency and convenience of tower transportation;The sealing of both ends of tower does not need to set other structures on tower for cooperation, so as not to affect the structural integrity of tower.

The application discloses a method for minimizing the risk of safety consequences for offshore wind power towers. The method includes: obtaining a multi-channel time sequence monitoring signal of the wind power tower; performing a working condition awareness data standardization process on the multi-channel time sequence monitoring signal based on the working condition interval of the unit operation, stripping the normal working condition fluctuations, and obtaining a monitoring data set; extracting risk assessment features representing the structural stress state based on the monitoring data set and the original monitoring signal, the features including cross-channel structural dynamic response proxy features; inputting the risk assessment features into a pre-trained risk level classification model, using the multi-classification cost-sensitive decision mechanism of the model to determine the target level with the minimum expected safety consequences among the candidate risk levels, and outputting the operation safety risk level. The application can solve the problems of easy missed report of high-risk state, multi-classification voting degradation and working condition interference under extremely unbalanced data.

The application relates to the technical field of offshore wind power mooring construction, and proposes a floating offshore wind power semi-tension composite cable and a construction method. The floating offshore wind power semi-tension composite cable comprises a mooring cable body, a tension adjusting assembly and a controller. The mooring cable body comprises a polyester cable, an upper anchor chain and a lower anchor chain. The upper anchor chain and the lower anchor chain are respectively connected to the two ends of the polyester cable. The tension adjusting assembly comprises a tension sensor and a tension hydraulic cylinder. The tension sensor is implanted in the polyester cable. The tension hydraulic cylinder is installed at the upper anchor chain. The tension sensor is used for monitoring the tension of the mooring cable in real time and feeding back to the controller. The controller is used for driving the piston rod of the tension hydraulic cylinder to extend or retract according to the feedback tension data, so as to adjust the tension of the mooring cable. The application has the effects of relieving the tension mutation of the mooring cable under complex marine environment, reducing the cross winding and load concentration of the cable body.