Overview of Control Strategies for Improving Power Quality of Brushless Doubly Fed Generators

While the traditional doubly fed induction generator currently plays a pivotal role in variable-speed applications, the brushless doubly fed generator (BDFG) has emerged as a promising alternative. This study presents a comprehensive literature survey on control strategies aimed at improving power quality in BDFGs. The discussion explores the causes of power quality issues associated with the BDFG system, delving into their negative impacts on the generator performance. Furthermore, the study provides a detailed and comparative analysis of various control systems designed to address these issues, supported by qualitative and graphical results. Additionally, the research highlights power quality challenges not previously addressed in the literature, drawing attention to areas that warrant further exploration by researchers in the near future.