Effect of large scale wind farms on the Egyptian power system dynamics

Abstract

In recent years wind energy has become an important source of clean electrical generation. Therefore, the penetration of wind turbines in electrical power systems will be increasing and then they may begin to influence overall power system behavior, making it impossible to run a power system by only controlling large scale power plant [1,2]. This foreseen expansion will result in many technical issues which must be dealt with in order to guarantee that the quality of the utility power is not affected.

In this paper aggregated wind farm modeling is presented to investigate the effect of wind farms of different sizes on the Egyptian power system dynamics. The wind farm is aggregated into minimal set of equivalent wind generator models combining all turbines with the same mechanical nature frequency into single equivalent turbine. Power system dynamics simulation software is used to study the impact of increasing wind turbine penetration on system performance. The proposed technique presented in [1] is applied to estimate the reduction in conventional electric capacity in presence of Wind Turbine Generators is applied while selecting the proposed wind farm size. The result shows that the Egyptian system can withstands wind farms of size up to 900 MW.