Power system interconnection is essential for energy reliability and security in power systems. However, the interconnections of many electric generating stations, micro generations, transmission lines, and loads can lead to voltage control and stability issues. Controlling real and reactive power between the lines or towards the load side may solve this issue. In addition to that, existing power transmission lines operate under huge stress and carry power nearer to their thermal limits. Reactive power management is therefore crucial. In this paper, a case study of a high voltage long-distance transmission line is considered in Matlab/Simulink to discuss the issues of voltage control considering various loading conditions, and to regulate the voltage, the FCTCR has been discussed with simulated results and waveforms.