As the electricity networks grow day by day, the occupancy rate of the transmission lines reaches the upper limit values. Where transmission lines are inadequate, new transmission lines are installed in parallel to existing lines, but this installation is very costly. Instead of installing a new transmission line, it is possible to control the systems by increasing the capacities of the transmission lines and providing reactive power compensation. In recent years, Flexible Alternating Current Transmission System (FACTS) devices have been used as reactive power compensation elements. The load buses have a maximum power rating limit that can be drawn from the system. The load buses cannot draw more power than the specified maximum power rating. Otherwise, there is voltage instability in the system. In this study, a FACTS device, Thyristor Controlled Serial Capacitor (TCSC), was used on power system for maximum loading parameter analysis of the system. The placement of the TCSC was investigated to maximize the loading capacity of the system. The TCSC was installed in all lines respectively and the voltage stability of the system, losses in the lines and the voltage profiles of the buses in each case were investigated through the PSAT program. With the use of TCSC has shown that, the voltage profile of the system is improved and the maximum load parameter of the system increases with the placement of the TCSC in the optimal place in the system.