Newton-Raphson TCSC model for power flow solution of practical power networks

The thyristor controlled series capacitor (TCSC) is one of the most effective flexible AC transmission system (FACTS) devices. It offers smooth and flexible control of the line impedance with much faster response compared to the traditional control devices. While numerous studies concerning the utilization of these devices, have been carried out so far, most of the research has focused on issues such as transient stability improvement, sub-synchronous resonance (SSR) mitigation, damping of power swings, voltage collapse, etc. In his paper, the modeling of TCSC for power flow studies has been discussed and presented in detail. The Newton-Raphson AC power flow method was used to perform the above studies. The performance of the proposed algorithm has been tested for IEEE-30 bus systems. It has also been observed that the proposed algorithm can be applied to larger systems and do not suffer with computational difficulties.