"Parameter-insensitive
sensorless decoupled P-Q controller
for doubly-fed induction
machine"
by
Professor Ooi Boon Teck
Abstract:
Doubly-fed induction machines (DFIM) are
economical because the back-to-back Voltage-Source Converters connected on
the rotor-side can be de-rated by 0.3, which is the maximum operating slip
in many applications. The controls require the positions of the rotors to
be known and presently this is accomplished by mechanically mounted position
encoders. The sensorless controller is based on Phase Lock Loop (PLL)
principle, which extracts the information from voltage and current
measurements. The seminar presents the method and the
experimental test results which show that the sensorless controller
functions even in a noisy environment and is insensitive to parameter
variation. An analysis is presented explaining why the sensorless controller
is immune to noise. The figure below shows that the experimental DFIM
outputs, active power PS and reactive power QS, can
track the control references in a decoupled manner.
Biography of Speaker：
Ooi Boon Teck attended the Victoria Institution
in Kuala Lumpur. He obtained the B.Eng.
(Honours) from the University of Adelaide,
Australia, the S.M. from the Massachusetts
Institute of Technology, USA, and the PhD. from
McGill University, Canada. He was a lecturer in
the Technical College (now UTM) in Kuala Lumpur.
He is Professor in the Department of Electrical
and Computer Engineering, McGill University. His
research interests have been in linear and
rotating electric machinery; subsynchronous
resonance (SSR) instability, long distance
transmission by HVdc, series and shunt capacitor
compensation; power quality improvement by PWM-rectifiers;
flexible ac transmission systems (FACTS);
Voltage-Source Converter-HVDC. His present
interest is how to increase the penetration of
wind power in the utility grid. He is a Fellow
of IEEE.
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| Date & time: |
19 December 2007
02.00 pm |
| Venue: |
Nanyang Technological University
School of Electrical and Electronic Engineering
Executive Seminar Room (S2.2-B2-53) |
| |
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