792 results about "Wind measurement" patented technology

The present invention is directed to a radio-acoustic sounding system for providing wind measurements at altitudes of 100 meters or less. Wind measurements are obtained by transmitting a pulse of audio frequency energy through one or more volumes corresponding to the coverage area of one or more radio frequency transceivers. The frequency of the audio pulse is selected to have a wavelength that is one-half the wavelength of the electromagnetic energy transmitted by the antenna or antennas. By monitoring a return radio frequency signal at selected times following the transmission of the audio pulse, wind data is obtained at selected altitudes. Wind speed and direction can be obtained by observing the Doppler frequency shift of return radio frequency signals, or by observing the amplitude of the return radio frequency signals. In accordance with an embodiment of the present invention, precipitation measurements may be made by transmitting a radio frequency signal at the same radio frequency as is used in connection with wind measurements, and observing return radio frequency signals.

The invention provides an ultra-short term wind power station generated power forecasting system, which belongs to the technical field of automatic scheduling of wind power plants. The system comprises a real-time wind measurement data server, a numerical weather prediction server, a wind power station real-time operation server, an ultra-short term forecasting processing server and data acquiring equipment, wherein the numerical weather prediction server is used for acquiring weather prediction data of a near-earth layer at the position of a wind power station; the real-time wind measurementdata server is used for acquiring wind speed data, wind direction data, temperature data, air pressure data and humidity data at the position of a wind measurement tower; the wind power station real-time operation data server is used for acquiring the total generated power data of the wind power station; and the ultra-short term forecasting processing server is used for forecasting the total generated power data of the wind power station at the next moment. The system solves the technical problems that future generated power variation tendency cannot be tracked and multi-step forecasting accuracy is relatively low in the prior art.

The invention provides a wind resource computation method, which comprises the following steps of analyzing original wind measurement data, and establishing a model required by CFD (computational fluid dynamics) computation on the basis of a full-height atmosphere boundary; computing wind speed and turbulent flow distribution under each wind direction condition by virtue of a CFD resolver; computing a wind resource distribution condition according to the wind speed and turbulent flow distribution under each wind direction condition, wind measurement mast coordinates, machine position coordinates, fan power data and wind condition data, and determining a position where a wind turbine generator is suitable to be mounted in a wind power plant. The method can also be used for analyzing wind resources of the wind power plant where the wind turbine generator is arranged.

An electro-optic system, e.g., mounted to a weapon, measures down range winds and a range-to-target for compensating the ballistic hit point. The system may include an optical light source, collimated to generate a laser spot on the target. The system may include a wind measurement receiver that captures laser light scattered from the target. The captured light may be modulated by atmospheric scintillation eddies, producing optical patterns which change in time and move with the crosswind. These patterns may be analyzed by a processor using covariance techniques to determine path-integrated crosswinds and associated errors. Ranging is done by measuring the time of flight of the laser pulse to the target collecting the scattered signal from the target. Compensated ballistic hit point, measurement errors and other data may be displayed on a micro-display digital eyepiece, overlaid on the real-time image of the target.

An electro-optic system, e.g., mounted to a weapon, measures down range winds and a range-to-target for compensating the ballistic hit point. The system may include an optical light source, collimated to generate a laser spot on the target. The system may include a wind measurement receiver that captures laser light scattered from the target. The captured light may be modulated by atmospheric scintillation eddies, producing optical patterns which change in time and move with the crosswind. These patterns may be analyzed by a processor using covariance techniques in either the time-domain or the frequency-domain to determine path-integrated crosswinds and associated errors. Ranging is done by measuring the time of flight of the laser pulse to the target collecting the scattered signal from the target. Compensated ballistic hit point, measurement errors and other data may be displayed on a micro-display digital eyepiece, or projected onto the direct view optics (DVO) of a riflescope so as to be overlaid in real-time on the optical image of the target.

A method and system for improving power production efficiency on a wind farm having of a plurality of spatially distributed wind turbines is provided. The method includes receiving a wind measurement that includes a wind direction impinging on a turbine (20), determining a misalignment of the wind turbine with respect to the wind direction, and activating a wake steering control for the wind turbine (20) to implement the misalignment of the wind turbine (20) with the wind direction such that the misalignment is adapted to steer a wake of the wind turbine away from a neighboring wind turbine (30). A wind turbine arrangement including a nacelle, a yaw controller, and a yaw drive is also provided.

A system for obtaining emission flux of a gas plume, emanating from a source, includes an airborne differential absorption lidar (DIAL) system for determining multiple concentration path length (CPL) values along a flight path; and an airborne wind measuring system (WMS) for determining a wind vector at the aircraft altitude. Also included is a processor for receiving the multiple CPL values determined by the DIAL system and the wind vector determined by the WMS. The processor uses the CPL values to compute either (a) an area-integrated concentration (AIC) value or (b) an average concentration value over a cross-plume extent, defined along the length dimension of the flight path. The processor also scales the wind vector to the near ground altitude level of the gas plume to obtain a scaled wind vector. The emission flux is obtained by multiplying either the AIC value or the average concentration value with a component of the scaled wind vector. The component of the scaled wind vector is defined by a vector perpendicular to the length dimension of the flight path.

The invention discloses a coherent wind measurement laser radar system with adjustable range resolution. In one aspect, the system employs a polarization circular beam splitter 3, locks vertical polarized light in a circular device, and repeatedly passes through AOM to allow emitted laser to generate n upsilon M frequency shift, thereby adjusting laser frequency shift; in another aspect, the system employs EOM 5 to cooperate with the polarization circular beam splitter 3, converts the polarization state of the laser in the circular device reaching preset offset into parallel vibration from vertical polarization, and converts continuous wave laser into pulse width adjustable pulsed light, thereby realizing the adjustment of the range resolution of a coherent wind measurement laser radar. The scheme not only improves the applicability of the coherent wind measurement laser radar on different resolution requirement occasions and under different weather, but also improves the data measurement reliability of the coherent wind measurement laser radar.

The invention discloses a multi-model multi-feature fusion method for predicting the wind speed along a high-speed railway, and the method comprises the following steps: 1, installing five auxiliary wind measurement stations nearby a wind measurement station; 2, carrying out the processing of original wind speed data through an interactive multi-model Kalman filtering method; 3, carrying out the wavelet processing of the filtered data, and building a prediction submodel for the low-frequency data after wavelet processing; 4, inputting target wind measurement station multistep-ahead prediction values and weather forecast target wind station prediction values obtained by a space-target wind measurement multistep-ahead prediction model, a self-target wind measurement station multistep-ahead prediction model and a weather-target wind measurement station multistep-ahead prediction model into a Bayes combined model, and obtaining the final target wind measurement station prediction value. The method can avoid the data interruption caused by a single wind measurement station hardware fault, and also can provide longer emergency processing time for the safety of the high-speed railway in a severe wind environment.

A system for producing electrical power based on wind energy is capable of predicting its power output. The system includes a set of wind turbine units, a first plurality of sensors each adapted to sense at least one wind characteristic at some of the wind turbine units, and a second plurality of sensors remotely located. At least one wind characteristic is estimated at the wind turbines not having one of the first plurality of sensors based on sensing by the first plurality of sensors and an estimate of changes in wind characteristic at wind turbine units caused by presence of other wind turbine units. The magnitude of electrical power production by the set of wind turbine units at at least one predefined point in time in the future is predicted based on the estimated wind characteristics and sensed wind characteristics.

The present disclosure describes structures, methods, and functionality for measuring a wind profile with networked anemometers. One method includes receiving real-time wind measurement data from each of one or more anemometer sensor platforms (ASPs) in a network, receiving atmospheric data, and calculating, using the received real-time wind measurement data and the received atmospheric data, at least one of real-time wind measurements, a wind profile, an average wind speed, or a weapon aiming offset.

The invention provides a wind power plant addressing system based on a development map. A data collection module, a visualized electronic map platform, an application layer module and the wind power plant addressing system are included; the data collection module collects basic data, stores the basic data in a classified way and integrates the basic data; related information is integrated and displayed in the visualized electronic map platform in the dimensions of time, region and development trend, a wind measurement analysis model is established according to data integrated by the data collection module, space-time characteristic data, resource complementary characteristic data and resource fluctuation characteristic data of wind measurement data are analyzed, and a wind power plant is pre-addressed; the application layer module quantifies wind energy resource condition and construction condition data of the wind power plant to be established after analysis, establishes an initial quantification standard of the wind power plant, and provides an initial addressing result for the visualized electronic map platform; and the wind power plant addressing system optimizes the initial quantification standard, and determines a final wind power plant addressing scheme according to expected development capacity. The invention also discloses a corresponding wind power plant addressing method.

The invention discloses a wind generator set engine room transfer function subregional fitting method. The method comprises the steps of 1, determining a target set, and collecting running data of a wind measurement mast and the target set within the same time; 2, determining the hub height H of the target set and calculating average wind speed data of the wind measurement mast at the height H; 3, utilizing IEC standards and the average wind speed data calculated in the step 2 as the basis, and removing abnormal running data in the step 1; 4, calculating a transfer function of an engine room of the target set, and correcting the transfer function, wherein the step 4 comprises the substep 4-1 of conducting fitting on a low wind speed area and a high speed wind speed area which are obtained by using the rated wind speed value as the limit and the substep 4-2 of calculating a fitting function order of the low wind speed area and a fitting function order of the high wind speed area respectively. By correcting the wind speed of the engine room, the wind speed of free flow at the center of a wind generator set wind wheel is obtained, and a power curve of the performance of the set can be more objectively reflected.

The invention discloses an ultrasonic three-dimensional wind measuring method and a three-dimensional ultrasonic anemometer. An ultrasonic three-dimensional wind measurement method, respectively setting three pairs of ultrasonic probes, that is, a first pair of horizontal probes and a second pair of horizontal probes parallel to the horizontal plane, and a pair of vertical probes perpendicular to the horizontal plane; The probe receives the propagation time of the ultrasonic waves sent by the other party; according to the measured propagation time and the distance between the two probes facing each other in three pairs, the three-dimensional wind speed and direction of the natural wind can be obtained. The invention can accurately calculate the three-dimensional wind speed and direction, has no moving mechanical parts, and has a heating device, does not require frequent maintenance, and is applicable to all-weather wind speed and wind direction measurement under severe environmental conditions.

The invention discloses a non-coherent radio interference suppression method of a wind profile radar, belonging to the signal processing and detection technical field. The method comprises the following steps: an interpulse pseudo random sequence and an intrapulse pseudo random sequence are generated at a transmitting end; coding processing is completed; then, modulation transmitting is completed and both pseudo random sequences are stored in a received signal processor; finally, receiving is completed at a receiving end and two times of decoding processing of the received signal is completed; thus, the processing procedure of the method is completed. The primary decoding operation of the received signal of a wind profile radar processed by the method is carried out through the interpulse pseudo random sequence synchronical to a transmitting modulation pulse, thereby restoring coherent wind measurement signal and converting non-coherent radio interference into white noise so as to reach the effect of reducing the power spectrum of radio interference signal; then, according to an intrapulse pseudo random codebook sequence, secondary decoding operation is carried out to reach the effect of increasing the power of wind signal; moreover, the interference suppression effect of the method is about (10log L)dB and the power of wind signal is increased about (20log P)dB.

The invention discloses a wind measurement network layout method based on wind power plant layout in a large-scale wind power base. The method includes primarily distributing a point of a wind measurement network, wherein the distributed point serves as a weather forecasting point; building a weather forecasting model; obtaining forecasting values according to the built weather forecasting model and obtaining the wind speed and the wind direction of the forecasting point according to the built weather forecasting model; optimizing the wind speed and the wind direction of the forecasting point by reference to practical geography and topography conditions of the forecasting point on the basis of atmospheric boundary layer dynamics and boundary layer meteorological theories, and obtaining precise predicted values of the wind speed and the wind direction of the forecasting point; carrying out contrastive analysis on wind measurement data of multiple forecasting points with similar atmosphere environment and similar geography, simplifying multiple pre-built wind power base places with remarkable upstream and downstream effects and strong correlation, and therefore finishing wind measurement network layout. Therefore, the aim of providing anemometer tower distributing points for wind energy resource measurement in the large-scale wind power based on low cost conditions is effectively achieved.

A computer-implemented method for determining a site for a wind turbine within a confined geographical target region on the basis of an estimate of a maintenance parameter comprises determining a wind climate at the target region, the wind climate including e.g. average wind speed, pre-dominant wind directions, or turbulence intensities. A function expressing the maintenance parameter of the wind turbine as a function of the flow characteristics is defined, and the function is applied to the geographical position to compute an estimated value of the maintenance parameter at that position. Meteorological measurements may be used to obtain the flow characteristics. Wind measurements performed at one location may be numerically extrapolated by numerical methods, e.g. by CFD, to other locations. The maintenance parameter may be expressed as a maintenance risk, number of component replacements, or as a maintenance cost per energy unit. Three-dimensional visualization of wind turbines, e.g. in GoogleEarth™ is further provided by the invention.

The invention relates to a method for giving a wire damage alarm when lead wire is coated by ice, which performs calculation and judgment on disconnection, vertical overload of a tower and longitudinal unbalanced tension of the lead wire. The method is implemented by the following work procedures: a, calculating design load and actual load according to tower design, actual vertical span, the design load and ice thickness measurement data; b, at the same time, calculating wire tension and unbalanced tension according to the ice thickness measurement data and wind measurement data; and c, sending early-warning information when any of the design load and the actual load calculation, the wire tension calculation and the unbalanced tension calculation is overloaded. When an icing on-line monitoring device monitors the icing condition of a power supply wire, the method performs calculation and analysis according to the monitored data to judge whether the wire icing condition threatens the safety operation, and send warning signals in time.

The invention discloses a data processing method for a wind measurement laser radar, and the method comprises the steps: obtaining the power spectrum of a plurality of signal sequences collected by the wind measurement laser radar in a current period; obtaining a peak point set of each signal sequence; judging whether each peak point set comprises a high signal to noise ratio peak point or not; taking the high signal to noise ratio peak point as an effective peak point if one peak point set comprises the high signal to noise ratio peak point, or else carrying out the tracking correlation of the peak point sets so as to search a real peak point; taking the real peak point as the effective peak point if the real peak point is found, or else determining that the peak point set does not contain the effective peak point; obtaining a radial wind speed matrix; and carrying out the wind field inversion through an observation matrix and the radial wind speed matrix, so as to obtain the wind speed vector of the current period. The invention also discloses a data processing device and system for the wind measurement laser radar, and a readable storage medium. Through the above mode, the system can improve the accuracy of a measurement result.