Study of the Placement of STATCOM in the South Sulawesi Transmission System after the Integration of PLTB Sidrap and Jeneponto

The wind or wind power used by the PLTB has a speed that is not always constant. The possibility of wind speed fluctuations is inevitable and should not be underestimated. This certainly affects the stability of the system when the two PLTBs, namely the Sidrap and Jeneponto PLTBs enter the Sulselbar interconnection system. To keep the voltage in the system normal, equipment is needed to overcome the voltage drop that occurs in the system. In this study, the Static Synchronous Compensator (STATCOM) was used as a voltage regulator. STATCOM can generate reactive power and absorb reactive power according to system requirements. The system used is the Sulselbar transmission system. The software used to simulate the installation of STATCOM is PSAT 2.19 MATLAB 2014a with the power flow calculation method using the Newton Raphson method. The simulation is carried out in two different conditions, namely the normal state and the situation when there is a three-phase short circuit before and after the Sidrap and Jeneponto PLTB integration. The simulation results of the system in normal conditions before the PLTB integrated it obtained that bus 43 had a voltage of 249 kV after the STATCOM placement increased to 274 kV. Meanwhile, when the system experiences a problem, the voltage at bus 43 is 187 kV after placing STATCOM, the bus voltage of 43 is 273.62 kV. The simulation results of the system under normal conditions after integrating PLTB obtained that bus 43 has a voltage of 249.75 kV. Meanwhile, when the system has a three-phase fault, the voltage on bus 43 is 186.97 kV. After placing STATCOM, the voltage on bus 43 is 271.39 kV. The simulation results show that STATCOM can improve the voltage profile on each bus.