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The basic structure of the UPFC, consists of 2 pieces sourced Voltage Converters (VSC), which are connected with a common DC link through a DC Capacitor Storage. Loadability enhancement in transmission line by minimizing the power losses using UPFC will increase the Available transfer capability (ATC) transmission line.
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Unified power flow controller (UPFC) as a power electronics-based controllers, can acts as a shunt compensator, phase converters and series compensators simultaneously or separately on the transmission line, the way of UPFC operation can be changed from one state to another without having to did generation reschedule or change line topologi. Transmission line (impedance line, the sender and receiver voltage, phase angle). To increase the capacity of power generation side, the wisest solution is to increase the loadability of transmission line by minimizing the power losses through a control parameter of But for the area/city that rapidly growing is a complex problem and complicated. Keyword: Unified Power Flow Controler, Power Losses, and Neplan SoftwareÄevelopment of electric power system can not be separated from the plant addition and new transmission line expansion. So that UPFC can be a solution of system development without having to reschedule of generation and change of line topologi Simulation results show that total of power losses in the system has decreased, the production of reactive power at the plant declined, power factor has increased and voltage of bus has increased also. By placing UPFC between bus of Bone (18) and bus of Sinjai (19) at Sulselbar system, and set the power flowing to the UPFC by (15 MW, 5 MVAR). UPFC as a family of flexible ac transmission system device (Facts Device), can control the real and reactive power flow simultaneously or separately via the control transmission line parameter. In the operation of electric power system, the power flow on the transmission line is a function of the parameter line (ie impedance line, the sender and receiver voltage and the phase angle). This paper presents Simulation of Power Losses Improvement with Unified Power Flow Controller (UPFC) on Transmission Line System of Southern and western Sulawesi (Sulselbar) Using Neplan Software. Wihardi Tjaronge Professor in Civil engineering Department of Hahasanuddin University Tola Professor in electrical engineering Department Professor in electrical engineering Department of Hahasanuddin University Phd Student in Study Program of Civil engineering of Hasanuddin University Simulation Of Power Losses Improvement With Unified Power Flow Controller (UPFC) On Transmission Line System Of Southern And Western Sulawesi (Sulselbar) Using Neplan Software