Analysis of UPFC Installation Effect on Power Flow in the 150 kV Aceh Transmission System

The electrical energy transmission line is a series of electric power distribution from the generator to the distribution line. The transmission of electrical energy often suffer losses with the appearance of current on the neutral side due to unbalance power flow on three phase system. The controlling of this power flow is very difficult, it required a system to overcome these problems. In this study, Flexible AC Transmission System (FACTS) equipment, namely UPFC (Unified Power Flow Control) was used to control power flow in the 150 kV Aceh transmission sub system. The calculation is obtained based on the Continuation Power Flow (CPF) method, the voltage profile is observed in graphical form to see the condition of the voltage profile when it reaches the Maximum Loading Parameter (MLP). The preliminary results of CPF simulation refer to the base power (MVA
$\mathbf{Base}=100$
MVA) and the base voltage
$(\mathbf{V}\ \mathbf{Base}=150\mathbf{kV})$
obtained losses on the active power (P) of 0.97 p.u, and it decreased to 0.20 p.u after UPFC installation. While the reactive power (Q) obtained quite large losses of 4.21 p. u. on CPF simulation, and it decreased to 0.91 p.u. after UPFC installation.