Stability analysis of pitch-regulated, variable-speed wind turbines in closed loop operation using a linear eigenvalue approach

Riziotis, VA; Politis, ES; Voutsinas, SG; Chaviaropoulos, PK

dc.contributor.author	Riziotis, VA	en
dc.contributor.author	Politis, ES	en
dc.contributor.author	Voutsinas, SG	en
dc.contributor.author	Chaviaropoulos, PK	en
dc.date.accessioned	2014-03-01T01:29:13Z
dc.date.available	2014-03-01T01:29:13Z
dc.date.issued	2008	en
dc.identifier.issn	1095-4244	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19167
dc.subject	Aeroelastic stability	en
dc.subject	Controls	en
dc.subject	Eigenvalue analysis	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.other	Control theory	en
dc.subject.other	Dynamics	en
dc.subject.other	Eigenvalues and eigenfunctions	en
dc.subject.other	Electric generators	en
dc.subject.other	Engines	en
dc.subject.other	Equations of motion	en
dc.subject.other	Feedback	en
dc.subject.other	Hydraulic machinery	en
dc.subject.other	Hydraulic motors	en
dc.subject.other	Linear systems	en
dc.subject.other	System stability	en
dc.subject.other	Turbines	en
dc.subject.other	Wind power	en
dc.subject.other	Wind turbines	en
dc.subject.other	Aeroelastic designs	en
dc.subject.other	Aeroelastic stability	en
dc.subject.other	Aeroservoelastic systems	en
dc.subject.other	Beam elements	en
dc.subject.other	Closed loops	en
dc.subject.other	Control equations	en
dc.subject.other	Control feedbacks	en
dc.subject.other	Controller dynamics	en
dc.subject.other	Controller parameters	en
dc.subject.other	Dynamic equations	en
dc.subject.other	Eigenvalue analysis	en
dc.subject.other	Eigenvalue approaches	en
dc.subject.other	Feedback signals	en
dc.subject.other	Generator torques	en
dc.subject.other	High wind speeds	en
dc.subject.other	Integral controls	en
dc.subject.other	Linear differential equations	en
dc.subject.other	Linear stability equations	en
dc.subject.other	MW wind turbines	en
dc.subject.other	Operation conditions	en
dc.subject.other	Reference states	en
dc.subject.other	Rotating frames	en
dc.subject.other	Stability analyses	en
dc.subject.other	Stability results	en
dc.subject.other	Linear equations	en
dc.subject.other	aerodynamics	en
dc.subject.other	control system	en
dc.subject.other	eigenvalue	en
dc.subject.other	feedback mechanism	en
dc.subject.other	parameterization	en
dc.subject.other	stability analysis	en
dc.subject.other	torque	en
dc.subject.other	wind turbine	en
dc.title	Stability analysis of pitch-regulated, variable-speed wind turbines in closed loop operation using a linear eigenvalue approach	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/we.276	en
heal.identifier.secondary	http://dx.doi.org/10.1002/we.276	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	A multi-body aeroelostic design code based on the implementation of the combined aeroelastic beam element is extended to cover closed loop operation conditions of wind turbines. The equations of a controller for variable generator speed and pitch-controlled operation in high wind speeds ore combined with the oeroelostic equations of motion for the complete wind turbine, in order to provide a compound aeroservoelostic system of equations. The control equations comprise linear differential equations for the pitch and generator torque actuators, the control feedback elements (proportionol-integral control) and the various filters acting on the feedback signals. In its non-linear form, the dynamic equations ore integrated in time to provide the reference state, while upon linearization of the system and transformation in the non-rotating frame, the linear stability equations are derived. Stability results for a multi-MW wind turbine show that the coupling of the controller dynamics with the aeroelostic dynamics of the machine is important and must be taken into account in view of defining the controller parameters. Copyright (c) 2008 John Wiley & Sons, Ltd.	en
heal.publisher	JOHN WILEY & SONS LTD	en
heal.journalName	Wind Energy	en
dc.identifier.doi	10.1002/we.276	en
dc.identifier.isi	ISI:000260099100006	en
dc.identifier.volume	11	en
dc.identifier.issue	5	en
dc.identifier.spage	517	en
dc.identifier.epage	535	en