Table of Contents
Advances in Electrical Engineering
Volume 2014, Article ID 349787, 11 pages
Research Article

Application of Firefly Algorithm in Voltage Stability Environment Incorporating Circuit Element Model of SSSC with Variable Susceptance Model of SVC

1Department of Electrical and Electronics Engineering, St.Anne’s College of Engineering and Technology, Panruti, Tamil Nadu 607 110, India
2Department of Electrical and Electronics Engineering, Pondicherry Engineering College, Puducherry 605 014, India

Received 31 January 2014; Revised 2 April 2014; Accepted 3 April 2014; Published 24 April 2014

Academic Editor: José R. C. Piqueira

Copyright © 2014 Luke Jebaraj et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


This paper proposes an application of firefly algorithm (FA) based extended voltage stability margin and minimization of active (or) real power loss incorporating Series-Shunt flexible AC transmission system (FACTS) controller named as static synchronous series compensator (SSSC) combined with static var compensator (SVC). A circuit model of SSSC and variable susceptance model of SVC are utilized to control the line power flows and bus voltage magnitudes, respectively, for real power loss minimization and voltage stability limit improvement. The line quality proximity index (LQP) is used to assess the voltage stability of a power system. The values of voltage profile improvement, real power loss minimization, and the location and size of FACTS devices were optimized by FA. The results are obtained from the IEEE 14- and 30-bus test case systems under different operating conditions and compared with other leading evolutionary techniques such as shuffled frog leaping algorithm (SFLA), differential evolution (DE) and particle swarm optimization (PSO).