2006 Graduate Catalog and 2005 Annual R & D Report - Sirindhorn ...

2006 Graduate Catalog and 2005 Annual R & D Report
Sirindhorn International Institute of Technology (SIIT)
Research Interests:
Electric Power Quality
Electric power quality is a term which has emerged
and attracted attention in electrical power engineering
in recent years, because end-use equipment is more
sensitive to disturbances that arise both on utility
power systems and within customer facilities. Also,
this equipment is more interconnected in networks
and industrial processes so that the impacts of a
problem related to electric power quality on any piece
of equipment are much more severe. Therefore,
understanding the performance of power systems is
becoming more and more important. Attention to
power quality is a joint user-utility responsibility. The
power quality problems can be overcome by the
efforts between utilities and customers with
applications of power electronics such as active
power filters, dynamic voltage restorers, etc.
Active Power Filters
With the proliferation of non-linear loads such as
diode/thyristor rectifiers, non-sinusoidal currents
(harmonic currents) are produced into power
systems. These undesirable harmonics not only have
deteriorated the power quality but also have induced
the effect of interference in electronic circuits. The
active power filters not only compensate for
harmonics, but also compensate for reactive power,
negative-sequence current, neutral current and/or
flicker in the industrial power systems.
Dynamic Voltage Restorers
In many industrial processes, high power quality is
essential for their proper operation. Although voltage
sag only a few tenths of a second, it may result in
disturbances with considerable costs due to loss of
production. Voltage sags are caused either by faults
and their clearance in the high voltage grid or by
fluctuations of load especially in weak distribution
networks.
Dynamic Voltage Restorers (DVRs) correct for
voltage sags and unexpected load changes:
maintaining the voltage to sensitive loads within
acceptable tolerances. The DVRs can improve
process productivity and reduce significantly
customer cost.
Dr. Sawasd Tantaratana
Professor
B.E.E. with high distinction, University of Minnesota, USA
M.S.E.E. Stanford University, USA
Ph.D. in Electrical Engineering, Princeton University, USA
Areas of Specialization: Communication systems, Spread-spectrum systems, Wireless communications,
Signal processing, Digital filter design and realization.
Research Insterests:
Communication Systems
Communication system design and analysis.
Performance evaluation of communication systems in
the presence of noise. Modulation techniques and
their performances. Signal detection, parameter
estimation, and filtering.
Wireless Communications and Spread-Spectrum
Systems
Spread-spectrum system design and analysis.
Properties and performances of pseudo-noise (PN)
sequences. Synchronization (acquisition and tracking)
of PN signals. Code division multiple access (CDMA)
and its applications. Multipath and fading effects in
wireless systems. Optimum and sub-optimum CDMA
receivers.
Digital Signal Processing
Signal and system analysis. Time-frequency signal
analysis techniques. Digital filter, filter bank, and
multirate converter design, analysis, realization, and
applications. Techniques for simple realization and
implementation of digital signal processors.
Dr. Toshiaki Kondo
Lecturer
B.Eng. in Mechanical Engineering, Tokyo Institute of Technology, Japan
M.Eng. in Information Processing, Tokyo Institute of Technology, Japan
M.Eng. in Image Processing, The University of Sydney, Australia
Ph.D. in Image Processing, National University of Singapore, Singapore
Areas of Specialization: Digital image processing, such as feature detection and segmentation in 2-D and 3-D.
Computer vision, such as depth estimation and motion estimation. Pattern recognition, such as human face
recognition.
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