*5.1. Load Scenario Development*

In this study, when the MCFC, which is responsible for the base load of the fuel cell-based combined power source, is applied to the ship with other power sources, such as ESS and diesel generator, we developed a load scenario for power quality analysis through voltage fluctuation rate, frequency fluctuation rate, and frequency stabilization time for power faults that may occur in the process of synchronizing to or disconnection from a single bus line. Scenario requested sailing information of the 5,500 TEU vessel of 'H' shipping company and collected and analyzed the data.

Based on the data of main engine and generator output of 5,500 TEU class container ship, we analyzed the load variation characteristics in normal seagoing operation in order to investigate whether each power source can maintain proper power quality for load fluctuation, such as synchronization and system deviation. We have developed a Load Scenario to determine if it is possible.

Using the real-time operation data, the load case was developed based on the following steps.

• Analyzes the load pattern according to the size of the fluctuating load when analyzing operational data.

*J. Mar. Sci. Eng.* **2019**, *7*, 241


$$\Pr\_{AE(MCRME > 10000kW)} = (0.025 \text{ X} \sum\_{i=1}^{nME} MCR\_{MEi}) + 250. \tag{1}$$

• For cargo ships with the main engine power below 10000 kW, *PAE* is defined as equation (2);

$$P\_{AE(MCRME < 10000kW)} = (0.05 \text{ X } \sum\_{i=1}^{nME} MCR\_{MEi}).\tag{2}$$
