Simulation Research On Output Characteristics Of Low-Wind-Speed Wind Turbines

Yemen is one of the developing countries in the Middle East.Since more than 23 years,is considered Republic of Yemen is going from darkness to darkness in the field of electricity power sector.It is one of chronic problem in the country since 1990 up to 2011.The next 10 years Yemen meets a huge and serious problem in electrical power sector more than ever.Renewable Energy is considered as one of effective solutions for power crisis in Yemen including;Solar,Wind and Geothermal energies.The objective of this work is to study and analyze existing status of power sector in Yemen and evaluate the advantages of renewable energy resources.In depth study about wind energy is presented in this thesis.Renewable energy could enhance electrical grid system in Yemen from green resources which then could be exploited in Yemeni rural areas to serve:education sector,lightening homes,and medical clinics,etc.The importance is to illustrate the features of clean energy to enhance the power sector in Yemen and propose solutions to develop this sector.The major concern is to analyze and observe the characteristic behavior of wind turbine so it can be used under different wind conditions in coastal area of Yemen.Moreover,the electrical design and testing of a 1.5 MW doubly fed induction generator is performed at low speed.The low speed wind turbine is used in grid connected mode.The wind turbine is coupled with power transformer through AC to DC and DC to AC converters in order to make it usable for transporting to the grid.The converter in between stabilizes the frequency variations that occurs due to the intermittent nature of the wind speed.The output voltage,current,power and frequency are analyzed at the output side of each component till the power grid.From the simulation results it is observed that the three-phase output of wind turbine is strongly dependent on wind speed and it must be controlled to be used by the grid for further use.