This work focuses on using two-dimensional finite element method to calculate apparent and incremental inductances for 40W fluorescent lamp ballast with different loading conditions based on its design documents. Seven inductance calculation techniques are adopted by calculating ballast stored magnetic energy and flux linkage using ANSYS software. The calculated results for apparent inductances show a good agreement with the design and average measured values, while calculated incremental inductances have been verified by noting the behavior of core hysteresis loop experimentally. These seven techniques establish a good base for researchers and designers to obtain an accurate inductance profile for any iron-core inductor.

ANSYS --- Apparent inductance --- Ballast --- Incremental inductance --- Inductance profile --- Iron-core inductor --- Finite Element Method.

Renewable energies can play an important role to provide electricity to rural communities .This work study the optimum design of a hybrid hydro-wind , micro-power system in rural area . Six case studies, including the impact of hydro head, flow rate, efficiency, and head loss for micro hydropower with wind turbine hub height were implemented based on HOMER software. The simulation results show the importance of using HOMER to assist system designers for assigning the optimum design of hybrid system components

HOMER --- Renewable Energy --- Micro-Power System --- Hydro Power --- Wind Power.