Transient in Electrical Power System under Large Induction Motor Starting Condition

The electric power system consists of static load, lump load, and motor. A large industry requires a large induction motor to run its production. However, the state of this induction motor harms the electric power system. The starting current on the motor is so high that it can be 5 to 10 times the nominal current. On the other hand, the motor absorbs much power from the electric power system and results in a voltage drop on the bus. This paper aims to improve the voltage drop on the bus and reduce the starting current of the induction motor. The analysis in this paper uses a transient curve of changes in voltage and starting current with time. Starting an induction motor with the Direct online (DOL) method as the basis for determining the voltage drop and the starting current of the induction motor. Furthermore, using the Capacitor Bank method, Fault Current Limiting (FCL), and Static Var Compensator (SVC) improves transients of voltage drop and motor starting current. All the results of these methods are compared to find out which method is the best.