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Abstract
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Article Information:
Voltage Stability Analysis with Static Var Compensator (SVC) for Various Faults in Power System with and Without Power System Stabilizers (PSS)
Mohammad Mohammadi
Corresponding Author: Mohammad Mohammadi
Submitted: 2011 May, 13
Accepted: 2011 June, 15
Published: 2011 July, 25 |
Abstract:
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However, in previous study the effect of SVC and PSS on voltage transient in power system with
suitable model of these component for various faults such as Single Line to Ground faults (SLG) and Line to
line and Line to Line to Ground (LL and LLG) and three phase faults have not been considered and analyzed
and investigated. Shunt Flexible AC Transmission System (FACTS) devices, when placed at the mid-point of
along transmission line, play an important role in controlling the reactive power Xow to the power network and
hence both the system voltage Xuctuions and transient stability. This study deals with the location of a shunt
FACTS device to improve transient stability in along transmission line with pre defined direction of real power
flow. The validity of the mid-point location of shunt FACTS devices is verified, with various shunt FACTS
devices, namely Static Var Compensator (SVC) in a long transmission line using the actual line model. It has
been observed that the FACTS devices, when placed slightly oT-centre towards sending-end, give better
performance in improving transient stability and the location depends on the amount of local/through load. This
study investigates the effects of Static Var Compensator (SVC) on voltage stability of a power system. The
functional structure for SVC built with a Thyristor Controlled Reactor (TCR) and its model are described. The
model is based on representing the controller as variable impedance that changes with the firing angle of the
TCR. A Power System Computer Aided Design /Electromagnetic Transients including DC (PSCAD/EMTDC)
is used to carry out simulations of the system under study and detailed results are shown to access the
performance of SVC on the voltage stability of the system.
Key words: FACTS, PSS, SVC, transient stability, Single Line to Ground fault (SLG), Line to Line fault (LL and LLG),
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Cite this Reference:
Mohammad Mohammadi, . Voltage Stability Analysis with Static Var Compensator (SVC) for Various Faults in Power System with and Without Power System Stabilizers (PSS). Research Journal of Applied Sciences, Engineering and Technology, (07): 668-676.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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