NDLI: Robust state control with narrowband disturbance rejection for wind driven DFIG under grid voltage unbalance

Content Provider	IEEE Xplore Digital Library
Author	Ebrahim, O.S. Jain, P.K.
Copyright Year	2009
Description	Author affiliation: Queen's University, Kingston, ON, Canada (Ebrahim, O.S.; Jain, P.K.)
Abstract	This paper introduces a direct power control (DPC) method with narrowband disturbance rejection capability for the grid-connected doubly fed induction generator (DFIG). The method is suited for variable speed operation of DFIG, especially in wind energy conversion systems connected to weak networks where voltage unbalance is common. The control framework is based on the linear quadratic regulator theory with a frequency shaped cost functional method. The DFIG is represented in the synchronous reference frame as a multi-input, multi-output controlled plant. The control objective is to bring the stator active and reactive power errors to zero despite plant modeling errors and disturbances. A supplementary compensation loop is provided to alleviate the operational problems associated with grid voltage unbalance. The supplementary compensator is optimally designed by considering the whole closed-loop system dynamics. The proposed DPC operates at constant switching frequency and there is no need for rotor flux estimation and for subsynchronous or supersynchronous speed detection. Stability analyses together with simulation studies on 2MW DFIG are provided to confirm the viability of the method.
Starting Page	1
Ending Page	7
File Size	727858
Page Count	7
File Format	PDF
ISBN	9781424445080
DOI	10.1109/EPEC.2009.5420937
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-10-22
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Regulators Induction generators wind energy Voltage control grid voltage unbalance Narrowband Robust control direct power control linear quadratic (LQ) control Shape control Wind energy Power control frequency shaped cost functional method Frequency Error correction doubly fed induction generator (DFIG)
Content Type	Text
Resource Type	Article

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