Analysis of Alternative Solution for Improving Voltage Profile Due to Overloading Interconnection System 150 KV

Voltage profile has a very important role in the distribution of electricity from generation sources to consumers. This research was conducted at PT. PLN APB West Java with the subject of the power flow study conducted to determine the voltage profile, active power flow and loading on the subsystem. The purpose of this study is to determine the voltage profile with a power flow study and understand the concept of operating patterns in a 150 kV transmission system during daily peak load conditions. The reason for this research is to evaluate the extent to which subsystems connected to the looping system can operate without problems that can disrupt the quality and reliability of the network on each busbar. So it is useful in the operation of the electrical system so that the voltage value is still within the reliability criteria of the subsystem. The method in this research explains the study of power flow in a 150 kV electrical system under normal conditions and in the working pattern conditions when the generator is only operating 1 unit, until it does not operate all (0 units) even the entire load is simulated using ETAP Software with analysis method Gauss-Seidel. Research findings with power flow studies are expected to obtain a solution for the system under conditions of low voltage disturbances (under voltage) due to more loading until returning to normal conditions. Keywords—transmission line, load flow, voltage profile, gaussseidel, ETAP power system