The Recent changes in power system networks are the introduction of deregulation, expansion planning, restructuring and optimal placement of Compensating devices. The enhancement of voltage profile and compensation is provided with FACTS devices in Transmission and Distributed Generation (DG) units at the sub-transmission and distribution levels. The Multiline FACTS devices are protagonist in maintaining the stability and reliability of power system networks, by providing compensation support and enhancing the voltage profile. However, the compensation is not appropriate, because of lag of identification of weak buses in transmission lines of power system. In this, the improvement of voltage profile can be achieved with placement of multiline FACTS devices. This proposed work, identify the suitable location and optimizes the capacity of multiline FACTS devices, which is implemented in simulation environment. In addition, the multiline FACTS devices results are compared with incorporating the placement of Unified Power flow Control method (UPFC) and validated. The proposed work is tested with IEEE 30 bus systems.