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Feed Forward Wind Turbine Control Using Upwind Turbines as Sensors.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Feed Forward Wind Turbine Control Using Upwind Turbines as Sensors./
Author:	Anderson, Eric William.
Description:	1 online resource (254 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 79-02(E), Section: B.
Contained By:	Dissertation Abstracts International79-02B(E).
Subject:	Mechanical engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9780355451726

Feed Forward Wind Turbine Control Using Upwind Turbines as Sensors.
Anderson, Eric William.

Feed Forward Wind Turbine Control Using Upwind Turbines as Sensors. - 1 online resource (254 pages)

Source: Dissertation Abstracts International, Volume: 79-02(E), Section: B.

Thesis (Ph.D.)

Includes bibliographical references

This dissertation seeks to improve the performance of a downwind turbine using information obtained from an upwind turbine. Methods for using an upwind tur- bine as a sensor are examined and evaluated. Next, a feed forward optimum pitch control scheme is introduced and investigated using a series of FAST simulations. In this control scheme an upwind is used as a wind speed sensor. Wind speed measurements are passed from the upwind turbine to a downwind turbine. The downwind turbine uses the knowledge of incoming wind speed to proactively adjust turbine blade pitch. Initial simulations are promising, but ultimately the feed for- ward control system is found to be very sensitive to timing errors. This makes the control scheme impractical in real world applications. A feed forward derating con- trol scheme is then developed. In this control scheme the rotor speed of the upwind turbine is monitored for evidence of an extreme gust event. If an extreme gust is de- tected the downwind turbine is derated to mitigate the negative e ects of the gust. A series of FAST simulations show that this control scheme can reduce structural loads and rotor overspeeds in the downwind turbine. Unlike feed forward optimal pitch control, this system is insensitive to timing errors. A more sophisticated wind farm simulation tool, SOWFA, is then used to simulate and evaluate feed forward derating control. First, a verification and validation study of SOWFA is carried out. Good agreement is found between SOWFA, OVERFLOW2 and FAST results. SOWFA is then used to simulate two test cases where turbines are subjected to ex- treme coherent gusts. In both test cases feed forward derating control significantly improves performance, reducing damage equivalent loads and increasing energy capture.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9780355451726Subjects--Topical Terms:

557493
Mechanical engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Feed Forward Wind Turbine Control Using Upwind Turbines as Sensors.
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500 $a Source: Dissertation Abstracts International, Volume: 79-02(E), Section: B.
500 $a Adviser: C.P. van Dam.
502 $a Thesis (Ph.D.) $c University of California, Davis $d 2017.
504 $a Includes bibliographical references
520 $a This dissertation seeks to improve the performance of a downwind turbine using information obtained from an upwind turbine. Methods for using an upwind tur- bine as a sensor are examined and evaluated. Next, a feed forward optimum pitch control scheme is introduced and investigated using a series of FAST simulations. In this control scheme an upwind is used as a wind speed sensor. Wind speed measurements are passed from the upwind turbine to a downwind turbine. The downwind turbine uses the knowledge of incoming wind speed to proactively adjust turbine blade pitch. Initial simulations are promising, but ultimately the feed for- ward control system is found to be very sensitive to timing errors. This makes the control scheme impractical in real world applications. A feed forward derating con- trol scheme is then developed. In this control scheme the rotor speed of the upwind turbine is monitored for evidence of an extreme gust event. If an extreme gust is de- tected the downwind turbine is derated to mitigate the negative e ects of the gust. A series of FAST simulations show that this control scheme can reduce structural loads and rotor overspeeds in the downwind turbine. Unlike feed forward optimal pitch control, this system is insensitive to timing errors. A more sophisticated wind farm simulation tool, SOWFA, is then used to simulate and evaluate feed forward derating control. First, a verification and validation study of SOWFA is carried out. Good agreement is found between SOWFA, OVERFLOW2 and FAST results. SOWFA is then used to simulate two test cases where turbines are subjected to ex- treme coherent gusts. In both test cases feed forward derating control significantly improves performance, reducing damage equivalent loads and increasing energy capture.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Mechanical engineering. $3 557493
655 7 $a Electronic books. $2 local $3 554714
690 $a 0548
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a University of California, Davis. $b Mechanical and Aerospace Engineering. $3 1179018
773 0 $t Dissertation Abstracts International $g 79-02B(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10623510 $z click for full text (PQDT)