An overview of a coordinated control technique for wind turbines and energy storage participating grid frequency regulation

Abstract

The frequency regulation capability of wind turbines is insufficient to satisfy the needs of grid frequency regulation. The characteristics of energy storage， such as flexible control， substantial throughput capacity， and rapid response rates， can effectively complement wind turbine limitations. Thereby， these facets advocate for incorporating an integrated wind-and-storage system in the practice of grid frequency control. This paper delves into the principles and control strategies associated with the participation of wind turbines and energy storage in the regulation of power system frequency. It outlines the principles and features of energy storage participating in frequency regulation， as well as models for frequency control and the control strategies. Moreover， the paper scrutinizes the characteristics and effects of different and hybrid energy storage systems. Subsequently， it elucidates the principles of frequency control for wind turbines and various control strategies， classifying the control modes of wind turbines into： variable-pitch control， rotor kinetic energy control， and unified control. In conclusion， the current state of advancements and prospects in this field are summarized and envisioned.

Keywords

• new-type power system
• primary frequency regulation
• integrated wind turbine-storage system
• energy storage system
• wind power generation