*2.1. Configuration of the Test System*

As a test system, we utilize the Geocha Island network, which will be constructed as an actual isolated microgrid in South Korea. Geocha Island has been organized for an isolated microgrid with PV units, wind generation units, three diesel generators, and two BESSs. Figure 2 shows the planned structure of the Geocha Island microgrid system, including detailed information. All information about the system was obtained from the Korean Electric Power Corporation (KEPCO) and [12]. The nominal system frequency and voltage are 60 Hz and 6.9 kV, respectively.

**Figure 2.** System configuration of the Geocha Island microgrid.
