| 1. Research
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Research Theme and Topics
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| My research
activities cover a variety of topics including the followings:
- Modeling and Identification of Nonlinear Systems:
The world around us can be seen as interactive signals and
systems. The first step in any research and study is "Modeling". My main area of research is
"modeling nonlinear dynamic systems" using
analytical and experimental methods (identification). The goal of this
research is to address different modeling approaches for
nonlinear systems. The approaches include white-box
modeling, using physical laws, then different optimization
techniques for parameter estimations. Other approaches
called black-box modeling, include wavelet analysis, Volterra series.
LOLIMOT,... - Large Scale Systems
Modeling,
identification, control and stability of large scale systems
has always been and still is a challenging research topic,
particularly if the subsystems of the large scale system is
considered to be nonlinear. - Intelligent Power Systems
Power
System monitoring using Phasor Measurement Units (PMUs) is
getting momentum in power industry. Such devices provide
instantaneous synchronized data from different points of a
power network which can be used for real-time and on-line
management of the power system. Such valuable data are used
for different purposes such as fault detection, state
estimation, voltage stability, dynamic stability, transient
stability, modeling and identification,.... -
Power System Modeling and
Identification Synchronous generators play a very
important role in the stability of the power systems. A
proper model for synchronous generators is essential for a
valid analysis of stability and dynamic performance of the
system. Almost three quarters of a century after the first
publications in this area, the subject is still a
challenging and attractive research topic. The traditional
methods of modeling the synchronous generators are well
specified in IEEE Standard 115. These methods assume a known
structure for the synchronous machine, using
well-established theories like Park’s transformation. They
address the problem of finding the parameters of the known
structure. Usually the procedures involve difficult and
time-consuming tests.
To overcome the
shortcomings of the traditional methods, identification
methods based on on-line measurements have gained attention
during recent years.
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Wind Generation and Control
As a result of increasing
environmental concern, more and more electricity is
generated from renewable energy.
Wind energy
technology has developed extremely rapidly and many
commercial wind turbines now on the market have capacity of
2MW or more. Also the cost of wind-generated electricity has
fallen steadily. With growing size and number of wind
generation units, the need for some form of advanced control
strategy, which can control such a nonlinear dynamic system
can easily be foreseen. Advanced control strategies, such as
optimal control, robust control, predictive control,
adaptive control, all need a linearized state space model of
the study system | |
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