Statistical model of wind farms for power flow.

Abstract

This paper presents a simplified model to represent a wind farm in a power flow study. This model has been developed taking into account the variability in the generated power from windmills and its normal operation. Its main advantages are its simplicity and the possibility of calculating the voltage in the park’s network without having to run a power flow study. Another advantage of the proposed method is that it is based in the fourth-pole theory, widely used in electrical engineering. Finally, the uncertainty of the model is assessed.

Up to now, distributed generation in Spain must inject power with unity power factor. But directive is going to change and some feasible regulations for reactive power are studied, attending specially to voltages across the grid. One possible application of this model is to study the management of reactive power in wind farms. Other possible application is to study the influence of nearby wind farms.