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Title: Monitoring of wind turbines

Abstract

Method and apparatus for determining the deflection or curvature of a rotating blade, such as a wind turbine blade or a helicopter blade. Also, methods and apparatus for establishing an inertial reference system on a rotating blade.

Inventors:
; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1372685
Patent Number(s):
9,714,085
Application Number:
12/992,804
Assignee:
Purdue Research Foundation SNL-A
DOE Contract Number:
AC04-94AL85000
Resource Type:
Patent
Resource Relation:
Patent File Date: 2009 May 13
Country of Publication:
United States
Language:
English
Subject:
17 WIND ENERGY

Citation Formats

White, Jonathan R., Adams, Douglas E., and Paquette, Josh. Monitoring of wind turbines. United States: N. p., 2017. Web.
White, Jonathan R., Adams, Douglas E., & Paquette, Josh. Monitoring of wind turbines. United States.
White, Jonathan R., Adams, Douglas E., and Paquette, Josh. 2017. "Monitoring of wind turbines". United States. doi:. https://www.osti.gov/servlets/purl/1372685.
@article{osti_1372685,
title = {Monitoring of wind turbines},
author = {White, Jonathan R. and Adams, Douglas E. and Paquette, Josh},
abstractNote = {Method and apparatus for determining the deflection or curvature of a rotating blade, such as a wind turbine blade or a helicopter blade. Also, methods and apparatus for establishing an inertial reference system on a rotating blade.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2017,
month = 7
}

Patent:

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  • A braking system is described for a vertical axis wind turbine, having a rotor having a centrally disposed axis or rotor shaft oriented in the vertical direction, a support for supporting the rotor and permitting the rotor to be elevated, a housing and shaft, for supporting the rotor for rotation, the housing and shaft secured together presenting a space therebetween, means for sealing the space between the housing and shaft, brake pads and a braking surface carried by the vertical axis wind turbine. The space between the housing and shaft when the shaft is received in the housing for receivingmore » hydraulic fluid injected therein under pressure to raise the rotor for rotation, and hydraulic circuitry to feed hydraulic fluid into, and drain fluid from, the space, whereby when the hydraulic fluid is drained from the space, the rotor is lowered causing the brake pads to engage the braking surface to stop the motion of the rotor.« less
  • A multisection blade for a wind turbine includes a hub extender having a pitch bearing at one end, a skirt or fairing having a hole therethrough and configured to mount over the hub extender, and an outboard section configured to couple to the pitch bearing.
  • A tornado type wind turbine has a vertically disposed wind collecting tower with spaced apart inner and outer walls and a central bore. The upper end of the tower is open while the lower end of the structure is in communication with a wind intake chamber. An opening in the wind chamber is positioned over a turbine which is in driving communication with an electrical generator. An opening between the inner and outer walls at the lower end of the tower permits radially flowing air to enter the space between the inner and outer walls while a vertically disposed openingmore » in the wind collecting tower permits tangentially flowing air to enter the central bore. A porous portion of the inner wall permits the radially flowing air to interact with the tangentially flowing air so as to create an intensified vortex flow which exits out of the top opening of the tower so as to create a low pressure core and thus draw air through the opening of the wind intake chamber so as to drive the turbine.« less
  • A vertical axis wind turbine is described. The wind turbine can include a top ring, a middle ring and a lower ring, wherein a plurality of vertical airfoils are disposed between the rings. For example, three vertical airfoils can be attached between the upper ring and the middle ring. In addition, three more vertical airfoils can be attached between the lower ring and the middle ring. When wind contacts the vertically arranged airfoils the rings begin to spin. By connecting the rings to a center pole which spins an alternator, electricity can be generated from wind.
  • An adaptive method for adjusting blade pitch angle, and controllers implementing such a method, for achieving higher power coefficients. Average power coefficients are determined for first and second periods of operation for the wind turbine. When the average power coefficient for the second time period is larger than for the first, a pitch increment, which may be generated based on the power coefficients, is added (or the sign is retained) to the nominal pitch angle value for the wind turbine. When the average power coefficient for the second time period is less than for the first, the pitch increment ismore » subtracted (or the sign is changed). A control signal is generated based on the adapted pitch angle value and sent to blade pitch actuators that act to change the pitch angle of the wind turbine to the new or modified pitch angle setting, and this process is iteratively performed.« less