*5.2. Development of Load Scenario Using Real-Time Operation Load Pattern*

#### 5.2.1. Sync Phase and Conditions for Normal Seagoing Case 1

Figure 13 and Table 6 summarize the synchronization and off-gird of the load pattern of the normal seagoing case 1 with the peak load of 127 kW of the combined power source. ESS is configured to discharge after one synchronization at a time when the total load of the complex power source is over 100 kW, and then it is changed to the charging mode by the ESS SOC reference value, and the charging is progressed in the state connected to the system.

**Figure 13.** Synchronization and system deviation for load pattern of normal seagoing case 1.

**Table 6.** Synchronization condition in normal seagoing case 1.


## 5.2.2. Sync Phase and Conditions for Normal Seagoing Case 2

Figure 14 and Table 7 summarize the synchronization and out of gird areas when the load of the combined power source reaches 140 kW according to the load pattern of the normal seagoing case 2. The ESS is synchronized with the MCFC at the moment when the total load exceeds 100 kW. The diesel generator is synchronized with the system at a total load of 130 kW or more, and is configured so that when the load drops below 130 kW, the system disengages. When the load drops below 100 Kw, the

ESS is also separated from the MCFC, and the scenario is configured to synchronize with the ESS as soon as the total load rises above 100 kW again.

**Figure 14.** Synchronization and system deviation for load pattern of normal seagoing case 2.


**Table 7.** Synchronization condition in normal seagoing case 2.

5.2.3. Sync Phase and Conditions for Normal Seagoing Case 3

Figure 15 and Table 8 summarize the synchronization and off grid part of the normal seagoing case 3. In the ESS, there are two synchronization periods and system outages repeatedly according to the load of the combined power source. In the section where the charge interval and the discharge interval are repeated, charging and discharging are performed in a state, in which the system synchronization is maintained. The diesel generator has two synchronization periods and a system outage period.

**Figure 15.** Synchronization and system deviation for load pattern of normal seagoing case 3.


**Table 8.** Synchronization condition in normal seagoing case 3.

#### **6. Procedures for Power Quality Test for Ship Hybrid Power System**

#### *6.1. Synchronization Procedure between Hybrid Power Sources*
