Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Hiro

101results about "Passive/reactive control" patented technology

Method of operating a wind turbine and wind turbine

ActiveUS20090060740A1Unnecessary shut down of a wind turbine particularlyPropellersWind motor controlTurbineLoad following power plant
The invention concerns a method of operating a wind turbine, wherein for a reduction of a wind load impacting on the wind turbine the rotational speed of the rotor and / or the electrical power output of the wind turbine are reduced depending on a deviation of the wind speed from the average wind speed. Moreover the invention concerns a wind turbine comprising a calculating unit adjusted for executing the inventive method.
Owner:SIEMENS GAMESA RENEWABLE ENERGY AS

Speed controller hydraulic slave system median self-diagnosis self-positioning self-adaptive method

ActiveCN108468615APerfect and reliable theoretical basis guidanceSolve adjustment quality problems such as frequent adjustmentsHydro energy generationPassive/reactive controlControl systemElectrical control
Provided is a speed controller hydraulic slave system median self-diagnosis self-positioning self-adaptive method. The method comprises: a speed controller electrical control system acquiring main distribution position feedback M, main distribution position set Mset and other data; detecting whether a speed controller hydraulic slave system is in a static balance, criterion including main distribution position set Mset being constant, if the criterion being satisfied, performing speed controller proportional valve median self-diagnosis, if not, waiting the criterion condition to be satisfied;performing speed controller proportional valve median drifting self-diagnosis, criterion including the main distribution position feedback M not being equal to the main distribution position set Mset;if M=Mset, setting of a proportional valve median set value B0 being rational, the proportional valve median set value B0 being equal to a proportional valve actual median value B0actual, entering amain distribution electrical median diagnosis step; if M is not equal to Mset, median of a proportional valve drifting, and setting of the proportional valve median set value B0 being not rational, performing proportional valve electrical median positioning correction. The method solves problems that a speed controller hydraulic slave system frequently adjusts and guide vane opening cannot be adjusted in place and other adjusting quality caused by drifting of the speed controller main distribution and the proportional valve electrical median, so as to adapt to current operating working conditions.
Owner:CHINA YANGTZE POWER

Controlling wind turbine noise

A method controlling a wind turbine to avoid tonal noise production is provided. The method comprises acquiring noise data representing noise produced by a wind turbine and acquiring data from a plurality of vibration sensors positioned at different locations about the wind turbine. The method further comprises identifying a region of interest in the noise data, the region of interest being a candidate for containing tonal noise generated by the wind turbine, and identifying a vibration sensor, the data for which correlates with the noise data in the region of interest. The method further comprises determining a threshold vibration level for the identified vibration sensor, the threshold being based on the vibration level detected by the identified vibration sensor in the region of interest, and adjusting one or more wind turbine operating parameters in response to the vibration level detected by the identified vibration sensor exceeding the threshold.
Owner:VESTAS WIND SYST AS

Intelligent Control Wave Energy Power Generating System

The present invention provides a system and method for converting wave energy into electric energy in an intelligent, practical, and efficient manner. The system utilizes a power input shaft coupled with a vertically reciprocating buoy to rotate a crank gear and a ratchet gear meshing therewith. An intelligent control system is included to monitor, control, and optimize the operations of the system. The length of the power input shaft is adjusted in response to water level fluctuations so that the rotational motion of the crank gear is intelligently controlled within a predetermined desirable region for maximum efficiency.
Owner:LEE MICHAEL FUQUAN

Speed controller proportional valve median adjusting method based on hydraulic slave system static balance

ActiveCN108468616APerfect and reliable theoretical basis guidanceSimple methodHydro energy generationPassive/reactive controlElectricityPower mode
Provided is a speed controller proportional valve median adjusting method based on hydraulic slave system static balance. The method comprises: step 1, keeping given power of a unit speed controller in a grid connected power mode constant, or switching a speed controller to an electric manual state, to make a speed controller hydraulic slave system in static balance; step 2, a speed controller electrical control system acquiring main distribution position feedback M, main distribution position set Mset data; determining whether the main distribution position feedback M is equal to the main distribution position set Mset; if M<Mset, using the highest unit precision i of a proportional valve median set value as step length, gradually increasing the proportional valve median set value B0, returning to the step 2; if M>Mset, using i as the step length, gradually reducing the proportional valve median set value B0, returning to the step 2; if the main distribution position feedback M is equal to the main distribution position set Mset, the B0 value being a proportional valve actual median value B0actual, an adjusting process ending. The method can accurately determine the speed controller proportional valve median, and solves a problem of adjusting quality of a speed controller hydraulic slave system caused by inaccurate setting of the speed controller proportional valve median.
Owner:CHINA YANGTZE POWER

Wind turbine generator unit maximum wind energy capture control method based on dynamic torque limiting value

A wind turbine generator unit maximum wind energy capture control method based on the dynamic torque limiting value includes the following steps that firstly, the Cp-lambda curve family of a unit is determined according to the aerodynamic characteristics of paddles, and when beta=betafine=constant and lambda=lambdaopt=constant, the maximum value of Cp=Cpmax is obtained; secondly, the optimal modal gain coefficient is calculated according to the numerical values of Cpmax and lambdaopt; thirdly, the torque of the quadric curve of the optimal wind energy capture is obtained; fourthly, the proportionality coefficient Kp and the integral coefficient Ki of a torque PI controller are determined according to the performance index requirement of the torque controller; and fifthly, the reference rotation speed [omega]ref, the maximum torque Tmax and the minimum limiting value Tmin of the controller are dynamically calculated according to the current generator rotation speed value, and therefore the torque controller can work along the ideal running trace curve, and the maximum wind energy capture is achieved. The wind turbine generator unit maximum wind energy capture control method based on the dynamic torque limiting value can effectively achieve the maximum wind energy capture and is large in energy efficiency conversion rate and high in electric energy quality.
Owner:ZHEJIANG WINDEY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products