Small Signal Stability of Power Systems with Large Scale Wind Power Integration

This paper surveys the impact of large scale wind power integration on the small signal stability performance of the power systems. For this purpose, different factors concerning wind power generation such as wind power integration levels and wind power plant location are considered in the small signal stability assessment of a weak power system via modal analysis. The changes in the modal characteristics of the system are evaluated by observing the movement of the oscillatory modes in the complex plane. Besides, time domain simulations were carried out in order to verify the conclusions inferred from modal analysis and to further determine in which way do large scale wind power integration levels affect the transient stability of a power system. It was found out that large wind power integration can have a positive or negative impact on both types of angle stability depending on the location of the wind power plant, the amount of the conventional generation replaced by wind power and the stress level of the power system.