Unified power flow controller is a new concept for the compensation and effective power flow management of multi-line transmission systems. The UPFC employs a number of Voltage Sourced Converters (VSCs) linked at the same DC terminal, each of which can provide series compensation for the selected line of the transmission system. Through common dc link, any inverters within the UPFC is able to transfer real power to any other and thereby facilitate real power transfer among the line. In this paper the UPFC system used for power flow management at different angles. The prototype UPFC system was developed and verified with hardware results. When the voltage sag is compensated, reactive power is controlled and transmission line efficiency is improved.