Overview of Up-to-Date Frequency Control Technologies for DFIG- and PMSG-based Wind Turbines

Abstract

A power system includes many system components that would affect dynamic frequency during a system contingency. Many traditional synchronous generators will be replaced by converter-based power sources, such as wind turbines. They would cause severe frequency stability problems if these new components do not provide any frequency control. That is, frequency stability will become one of the important issues in modern power grids. Thus, this paper surveyed various frequency control schemes for different types of wind turbines, and the requirements of frequency response services in electric markets.