Available Transfer Capability enhancement in constrained network conditions using TCSC

FACTS devices have been successfully used for many years in order to enhance the stability and loadability of transmission network. Available transfer Capability (ATC) is a measure of the remaining power transfer capability of the transmission network for further transactions. ATC accurately reflects the physical realities of the transmission network, all system conditions, uses, and limits in a consistent manner. It depends on other parameters namely Total Transfer Capability (TTC), Capacity Benefit Margin (CBM), Transmission Reliability Margin (TRM), and Existing Transmission Commitments (ETC) that are described in this study thoroughly. This paper investigates the optimized use of FACTS devices and mainly Thyristor Controlled Series Capacitor (TCSC) to improve ATC and maximize TTC considering thermal limit and voltage limit of the transmission lines including the line outages in the power system without any power system physical constraints violations. This study also uses the repeated power flow (RPF) algorithm for the real-time calculation of the transfer capability. The case study has been implemented on modified IEEE 24-bus reliability test system.