For last couple of decades, the demand for electrical power has increased manifold. As we have limited resources of power generation, it results into heavy loading of the transmission line, which leads to stability, voltage sag/swell and reactive power issues. Application of FACTS controllers in a power system is a promising and more efficient way for transfer and control of a bulk amount of power. This paper focuses on voltage dependency on reactive power and control of the same for improvement in the power quality. A comparative analysis of steady-state power flow control of a power system transmission network using FACTS controllers namely SVC, STATCOM and TCSC are performed. The performance of these FACTS controllers in the control of power flow on a given test bus system is analyzed. Voltage magnitude is compared for shunt-connected controllers to analyze the efficiency. Reactance modeling and power injection modeling techniques are used to incorporate the FACTS controllers into Newton-Raphson load flow algorithm. Numerical results on a benchmark 5 bus test system with incorporation of each of the FACTS controllers are presented.