Sirindhorn International Institute of Technology
Klong Luang
Pathumthani,
Telephone: +66 29869009
Fax: +66 2986 9112
Email address: ngamroo@siit.tu.ac.th
URL: http://www.siit.tu.ac.th/dirctory/ft_fac/issarach.html
Stability, Control systems, Flexible AC Transmission Systems (FACTS), DC power systems, Genetic algorithms
Power System Control & Stabilization
Power system stability limitation and control problems constitute very
important considerations in the planning, design and operation of modern power
systems. The increasing complexity of power systems, and the financial and
regulatory constraints have forced utilities to operate the systems nearly at
stability limits. Greater reliance is, therefore, being placed on the use of special
control aids to enhance system security, facilitate economic design, and
provide greater flexibility of system operation. These motivate a new concept
of power system control and stabilization based on advances in technology of
power system controllers, information technology, and control theory.
FACTS Applications
The fast development of power electronics based on new and powerful
semiconductor devices has led to innovative technologies, such as Flexible AC
Transmission System (FACTS) and High Voltage Direct Current Transmission
(HVDC), which can be applied in transmission and distribution systems. The
technical and economical benefits of these technologies represent an
alternative to the application in ac systems. On the other hand, deregulation in
the power industry and opening of the market for delivery of cheaper energy to
the customers is creating additional requirements for the operation of power
systems. FACTS technology offers major advantages in meeting these challenging
requirements.
Robust Control Application to Design of Power System Damping Controllers
In the interconnected-power systems, variations in system configuration due to
unpredictable disturbances as well as nonlinear characteristics of power
systems cause several system uncertainties. Under these situations, the high
robustness of power system damping controller is significantly desired. On the
other hand, the theory of robust control has significantly developed and been
applied to many fields in engineering. This research takes advantages of robust
control theories such as H¥ control, variable structure control, etc. to design
of robust damping controllers of FACTS devices, power system stabilizers, etc.