Abstract: In order to improve transmission capacity and maintain transmission flexibility, we use FACTS technology based entirely on power electronics. Fixed capacitor thyristor control reactor compensation technology is a shunt-type FACTS control technology used in power systems to maintain steady-state voltage stability in power system networks. The demand for electricity as an economic source of energy is growing rapidly. Therefore, renewable energy sources are being widely used. Renewable energy systems are important to meet the growing demand for energy systems engineers have introduced solar energy into the grid. The injection of renewable source stations has caused problems. Therefore, the power quality of the power line does not meet the standards. This study consists of a fuzzy logic-based Fixed-Capacitance Thyristor Control Reactor (FC-TCR) controller for improving voltage stability. This study introduces the use of a fuzzy system with rapid control features on the basis of the continuous compensation method. In the field of power engineering, the design and simulate fuzzy logic control of FC-TCR and trigger angles to achieve better, smoother voltages. Using a Fixed Capacitor Thyristor Controlled Reactor (FC-TCR) is advantageous because it can increase dynamic stability, load transmission line capabilities and the quality of electricity. Simulation results indicate the effectiveness of the proposed compensation strategy in improving the quality of electricity and the stability of system.