**4. Simulation cases, results and discussion**

### **4.1 System load, wind, and solar flux profile**

The annual synthetic load profile from January 1st, 2003 to December 31st, 2003 with one hour average samples, the annual synthetic wind speed profile, and the annual solar flux profile used for analyzing the performance of a sample village power system are shown in Fig. 8, Fig. 9, and Fig. 10, respectively. It can be observed from Fig. 8 that the maximum load

Fig. 8. Synthetic annual load profile for sample village electric power system.

Fig. 9. Synthetic annual wind speed profile for Kongiganak Village, Alaska.

The annual synthetic load profile from January 1st, 2003 to December 31st, 2003 with one hour average samples, the annual synthetic wind speed profile, and the annual solar flux profile used for analyzing the performance of a sample village power system are shown in Fig. 8, Fig. 9, and Fig. 10, respectively. It can be observed from Fig. 8 that the maximum load

Fig. 8. Synthetic annual load profile for sample village electric power system.

Fig. 9. Synthetic annual wind speed profile for Kongiganak Village, Alaska.

**4. Simulation cases, results and discussion** 

**4.1 System load, wind, and solar flux profile** 

of the system is about 150 kW, the minimum load is about 45 kW and the average load is about 95 kW. From Fig. 9 it can be observed that the annual average wind speed is about 7 m/s (15.66 miles/hr). From Fig. 01 it can be observed that the village has low solar flux during winter months and high solar flux during summer months. The clearness index data for the solar insolation profile is obtained using the solar maps developed by NREL (NREL Solar Radiation Resource, 2007).

Fig. 10. Annual solar flux for Kongiganak Village, Alaska.
