Recognition of Electric Machines Boundary as The Constraint of Over Current Relay Coordination in Real Industrial Application with Serial Firefly Algorithm Optimization

The electric machines such as motor, transformer, and generator plays an essential role in the production process of a factory. Due to expansion, there is an intention to invest a new electric machine that expected to work correctly with the existing system. To integrate the new electric machines, the existing protection system has to be evaluated carefully without limiting the machine's capability. Based on the actual experiences, one of the frustrating issues during the commissioning stage is energizing failure due to relay mal-trip. The objective of this paper is to summarize and model the electrical machines in the protection system perspective and offers a new method to coordinate the relays with the electric machines recognition using the artificial intelligence of serial firefly algorithm. This proposed method is endorsed by a real industrial power system and will demonstrate the ability to coordinate the relays without violating the electric machine boundary.