Power distribution system modeling and simulation: 10 years practical experience of power system modeling and simulation based on utilities requirements; Develop the several applications in DEW software, Distributed energy resource analysis (solar and wind generation, storage system, plug-in electric vehicle); Develop the DER adoption analysis and DER impact study from several projects, Solar generation, energy storage optimal control algorithm development and analysis; Develop the optimal control algorithm for solar generation and energy storage system Wind generation forecasting system; Study about existing forecasting system and develop the frequency domain approach algorithm