Setting Coordination Relay Protection On Multiloop Model Distribution Electrical Power System Using Firefly Algorithm

The purpose of this paper was to obtain a setting relay coordination on a multiloop model power distribution system using the firefly algorithm. Continuity of electrical power system distribution must be maintained. Electric power system network models have been updated starting from the radial, loop and the new one is the multiloop system. Multiloop system was also very suitable for systems that have been integrated with distributed generation (DG). DG is a combination of small-scale power plants with the main source and is placed scattered, such as unrenewable and renewable energy such as photovoltaics, wind turbines, and micro-hydro. But the problem of extinction due to external interference can be suppressed to a minimum with good and fast coordination of the relay. Setting Relay coordination on multiloop systems, it is more complex than the radial and loop system. To get a fast and optimal setting relay on a multiloop system, we can calculate relay settings uses an optimization algorithm. One of them is the firefly optimization algorithm. The firefly algorithm is an algorithm that applies the behavior of fireflies based on the intensity of the light. By using a firefly optimization algorithm to get the value of the relay protection coordination settings will shorten the manual calculation, get the value of the setting quickly, and the most optimal. From the optimization results using the firefly algorithm obtained relay settings with an operating time of 14 relays reaching 3.717 seconds faster than 4.339 seconds compared to manual calculations.