Frequency modeling of wind power fluctuation and the application on power systems

System imbalance due to power fluctuation is the first concern of power grid with large scale wind power integration. Traditional studies are limited in time domain, where the modeling is not convenient enough. In this paper, a model based on frequency domain is proposed. This model is more precise, and capable to take some important factors, such as the layout of wind farm, into account. This paper also presents a fast engineering implementation of this model, which can be applied on different power system studies. The case studies show this model can perfectly evaluate the ramp rate and reserve requirement of power systems, no matter under normal or extreme weather condition, therefore the validity and flexibility of this model get proved.

I. Introduction

With the development of society, more wind power is integrating into power grid to meet the emission-reduction demand of low-carbon economy. However, the first concern of system operation is to maintain the balance between the generation and demand, which is against by the large power fluctuation from wind farm. Thus, it is necessary to develop a wind power fluctuation model for fundamental study and industry application, in order to support the security operations of power systems.