A Particle Swarm Optimization based Approach for Power System Transient Stability Enhancement with TCSC

Power system engineers are currently facing challenges to increase the power transfer capabilities of existing transmission system. This led to the evolution of FACTS technology. FACTS controller helps in raising dynamic stability limit, provide better power flow control also provides improvement in asset utilization, system flexibility and system performance. Thyristor controlled series compensator (TCSC) is a series FACTS controller which can control the line impedance, improve network stability and damp the power system oscillations. This paper presents a procedure for modelling and optimal tuning the parameters of Thyristor controlled series compensator (TCSC) controller for the power system transient stability. For the simulation purpose, the model of Single Machine Infinite Bus (SMIB) power system with TCSC controller is developed in MATLAB. The design problem of TCSC controller is formulated as an optimization problem and particle swarm optimization (PSO) is applied to search for the optimal TCSC control parameters. The results obtained shows that the proposed TCSC controller is effective in damping small disturbance condition in the power system.