Performance Evaluation of TCSC and SVC on Voltage Stability Limit Improvement and Loss Minimization under Most Critical Line Outaged Condition

Due to the ever increasing demand for power, environmental constraints in expansion of transmission networks and the emerging scenario of restructuring of power system networks, the transmission lines are prone to be operated under heavily stressed conditions. In such a heavily stressed condition, there is a risk of line outage and the consequent voltage instability. This necessitates voltage stability limit improvement under probable line outage contingency conditions to keep the system under voltage secured conditions. Flexible Alternating Current Transmission System (FACTS) devices are found to be encouraging in improving voltage stability limit of power systems. In this paper, optimal location of TCSC and SVC are considered for reducing line losses and improving voltage stability limit. Amount of increased reactive power generation and line losses are taken as indicators of stressed conditions of a power system. The optimal location and sizing of TCSC and SVC are identified through Particle Swarm Optimization (PSO) algorithm. The proposed method is tested in IEEE 30 bus test system and results obtained are proving the validity of the work.

[1]  Riccardo Poli,et al.  Particle swarm optimization , 1995, Swarm Intelligence.

[2]  N Yorino,et al.  A NEW FORMULATION FOR FACTS ALLOCATION FOR SECURITY AGAINST VOLTAGE COLLAPSE , 2003 .

[3]  M. H. Haque,et al.  Optimal location of shunt FACTS devices in long transmission lines , 2000 .

[4]  I. Musirin,et al.  Novel fast voltage stability index (FVSI) for voltage stability analysis in power transmission system , 2002, Student Conference on Research and Development.

[5]  C N Arpitha,et al.  VOLTAGE STABILITY ENHANCEMENT IN CONTINGENCY CONDITIONS USING SHUNT FACTS DEVICES , 2013 .

[6]  S. Afsharnia,et al.  Voltage Stability Enhancement in Contingency Conditions Using Shunt FACTS Devices , 2007, EUROCON 2007 - The International Conference on "Computer as a Tool".

[7]  Laszlo Gyugyi,et al.  Understanding FACTS: Concepts and Technology of Flexible AC Transmission Systems , 1999 .

[8]  H. Sasaki,et al.  A comprehensive approach for FACTS devices optimal allocation to mitigate voltage collapse , 2002, IEEE/PES Transmission and Distribution Conference and Exhibition.

[9]  S. Chusanapiputt,et al.  Optimal SVC and TCSC Placement for Minimization of Transmission Losses , 2006, 2006 International Conference on Power System Technology.

[10]  O. L. Bekri,et al.  Optimal location of SVC and TCSC for voltage stability enhancement , 2010, 2010 4th International Power Engineering and Optimization Conference (PEOCO).

[11]  Claudio A. Canizares,et al.  Analysis of SVC and TCSC controllers in voltage collapse , 1999 .

[12]  Georgios C. Stamtsis,et al.  Optimal choice and allocation of FACTS devices in deregulated electricity market using genetic algorithms , 2004, IEEE PES Power Systems Conference and Exposition, 2004..