alexa Enhancement of Voltage Stability by using FACTS under Normal & Post-Fault Steady State Conditions
ISSN: 2332-0796

Journal of Electrical & Electronic Systems
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Research Article

Enhancement of Voltage Stability by using FACTS under Normal & Post-Fault Steady State Conditions

K. Venkata Ramana Reddy, M. Padma Lalitha* and P. Harsha Vardhan Reddy

Department of EEE, Annamacharya Institute of Technology and sciences, Rajampet, Kadapa (DT), AP (ST), India

*Corresponding Author:
M. Padma Lalitha
Department of EEE, Annamacharya Institute of Technology and sciences
Rajampet, Kadapa (DT), AP (ST), India
E-mail: [email protected]

Received Date: August 21, 2013; Accepted Date: September 20, 2013; Published Date: September 23, 2013

Citation: Venkata Ramana Reddy. K, Padma Lalitha. M, Harsha Vardhan Reddy. P (2013) Enhancement of Voltage Stability by using FACTS under Normal & Post-Fault Steady State Conditions. J Electr Electron Syst 2:113. doi:10.4172/2332-0796.1000113

Copyright: © 2013 Venkata Ramana Reddy K, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

In this paper an IEEE standard test system has been considered and Load flows were computed by using Newton- Raphson method with the help of MATLAB and a weak bus is identified. The bus that is with a low voltage magnitude is incorporated with FACTS devices namely TCSC and SVC in order to improve the voltage under normal conditions. Then the reactive power at a particular bus is increased until it reaches to the instability point and the voltage stability condition is evaluated by using an L-index method. The values which approach unity imply that it reaches to instability, and corresponding bus can be treated as weak bus i.e. with a highest value of L-index, and is incorporated with FACTS devices to enhance the voltage stability under post-fault steady state condition also.

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