Investigation of Wind Farm Interaction with EEPCO���s Grid

Ethiopia is planning to use wind power plants in addition to the existing hydropower plants for supplying the increasing loads to ensure sustainable development. Consequently large-scale Megawatt wind farms are going to be integrated to EEPCO‟s (Ethiopian Electric Power Corporation) grid increasing wind energy penetration to the grid. This thesis is concerned with an investigation of wind farm interaction with EEPCO‟s grid under transient operating condition. It is mainly concerned with Fault ride through (FRT) capability which includes voltage recovery at the wind turbine terminals; active and reactive power behavior of the wind turbines after the fault is cleared. Permanent Magnet Synchronous Generator Wind Turbine (PMSG WT) is going to be used in recently planned wind farms of Ethiopia like Adama and A‟isha. As a result dynamic model of PMSG WT is developed by DIgSILENT PowerFactory simulation tool. Then Adama phase-1 wind farm with 34 PMSG WTs is modeled by using aggregated modeling approach. This model is used to investigate FRT capability and active and reactive power behavior of the wind farm by applying three-phase short circuit fault.