The document discusses the performance of Flexible AC Transmission System (FACTS) devices on voltage stability in a deregulated power system. It focuses on enhancing voltage stability using FACTS controllers like Static Var Compensator (SVC) and Thyristor-controlled series capacitor (TCSC). The optimal location of FACTS devices is determined using sensitivity methods. The effectiveness of the proposed method is demonstrated on a modified IEEE-9 bus system using PowerWorld simulator 8.0.

1. Performance of FACTS Devices on Voltage Stability
in a Deregulated Power System
N.Sambasiva Rao1, Dr.J.Amarnath2, Dr.V.Purnachandra Rao3
1Associate Professor & Head, Department of EEE, NRI Institute of Technology,
Vijayawada, A.P, India.
2Professor, Department of EEE, Jawaharlal Nehru Technological University, Hyderabad,
A.P, India
3Professor, Department of EEE, Andhra University, Visakhapatnam, A.P, India
1www.icgst.com
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2. In a deregulated power system structure, power producers and customers share a common
transmission network for wheeling power from the point of generation to the point of
consumption. All parties in this open access environment may try to produce the energy
from the cheaper source for greater profit margin, which may lead to overloading and
congestion of certain corridors of the transmission network. This may result in violation of
line flow, voltage and stability limits. In power system environment voltage stability plays
major role, it is integral part of the power system stability. In general Voltage stability
problems occur more frequently in a heavily loaded system. Lack of voltage stability may
develop severe problems in the power system, which might lead to system black out in the
form of sudden voltage dips at the load buses. The cause of voltage instability could be
numerous. The control of voltage levels can be accomplished using FACTS Controllers like
Static Var Compensator (SVC), Thyristor-controlled series capacitor (TCSC). This paper
focuses on the enhancement Voltage Stability using FACTS devices. The optimal location of
FACTS devices were determined based on Sensitivity methods. The effectiveness of
proposed method is demonstrated on modified IEEE-9 bus system using power world
simulator 8.0.
2www.icgst.com
http://www.icgst.com/paper.aspx?pid=P1111351312
Performance of FACTS Devices on Voltage Stability in a Deregulated Power System
Abstract

3. 3www.icgst.com
J. Amarnath obtained the B.E degree in electrical engineering from Osmania University,
Hyderabad, A.P. India in 1982 and the M.E. degree in power systems from Andhra University,
Visakhapatnam in1984. He worked in Tata Electric Company, Bombay during 1985-1986. In 1987
he was a Lecturer in Andhra University for a period of 2 years and then he joined in Nagarjuna
University for a period of 4 years as Lecturer. In 1992 he joined JNTU College of Engineering,
Kukatpally, Hyderabad. Presently he is professor and head of the department of Electrical and
Electronics engineering department, JNTU, Hyderabad, A.P. He presented more than 250
research papers in national and international conferences. His research interests includes high
voltage engineering, gas insulated substations, industrial drives, power electronics, power
systems, microprocessors and microcontroller applications to power systems and industrial
drives.
Jawaharlal Nehru Technological University Hyderabad
Kukatpally, Hyderabad - 500 085, Telangana, India http://www.jntuh.ac.in/new/

4. 4www.icgst.com
N.SambasivaRao received the B.Tech degree in Electrical & Electronics Engineering and M. Tech
in Electrical Power Engineering from JNTU Hyderabad, India. He has 13 years experience in
teaching. He is perusing his Ph.D from JNTU, Hyderabad, India. He published a 17 research
papers in various International Journals and 5 research papers in International ,National
Conferences.He got BEST TEACHER AWARD BY JNTU KAKINADA IN THE YEAR 2014. He is the
Member of International Association of Engineers (IAENG) and Life member of ISTE.He is
currently working as Associate Professor and Head of the department in Electrical & Electronics
Engineering at NRI Institute of Technology, Agiripalli, India. He got “Best Achiever award of
Andhra Pradesh “By NCERT, New Delhi, India. His Areas of interest include Electrical Machines,
FACTS and power System Deregulation.
NRI INSTITUTE OF TECHNOLOGY
http://www.nri.edu.in/

5. 5www.icgst.com
V. Purnachandra Rao obtained the B.E degree in electrical engineering from Govt
college of Engineering,Kakinada , A.P. India in 1962 ,M.E. degree in power systems
from BHU, Varanasi in1964 and Ph.D from BHU in 1972.He worked as Lecturer
Associate Professor in BHU varanasi during 1964-1979. He worked as Associate
Professor,Professor,Head of the Department in Andhra University from 1979-2000. He
presented more than 50 research papers in national and international conferences.
His research interests includes high voltage engineering, gas insulated substations,
industrial drives, power electronics, power systems, microprocessors and
microcontroller applications to power systems and industrial drives.
Andhra University
http://www.andhrauniversity.edu.in/

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