Grid Forming Converters in Renewable Energy Sources Dominated Power Grid: Control Strategy, Stability, Application, and Challenges

Journal of Modern Power Systems and Clean Energy

Wang Xiang¹  Jinyu Wen¹  Haobo Zhang¹  Weixing Lin¹ 

[1] State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology,Wuhan,China,430074;

关键词: Grid following (GFL) control;    grid forming (GFM) control;    high-voltage direct current (HVDC);    microgrid;    renewable energy;    small-signal stability;   

DOI  :  10.35833/MPCE.2021.000257

来源: DOAJ

【 摘 要 】

The renewable energy sources (RESs) dominated power grid is an envisaged infrastructure of the future power system, where the commonly used grid following (GFL) control for grid-tied converters suffers from lacking grid support capability, low stability, etc. Recently, emerging grid forming (GFM) control methods have been proposed to improve the dynamic performance and stability of grid-tied converters. This paper reviews existing GFM control methods for the grid-tied converters and compares them in terms of control structure, grid support capability, fault current limiting, and stability. Considering the impact of fault current limiting strategies, a comprehensive transient stability analysis is provided. In addition, this paper explores the typical applications of GFM converters, such as AC microgrid and offshore wind farm high-voltage direct current (OWF-HVDC) integration systems. Finally, the challenges to the GFM converters in future applications are discussed.

【 授权许可】

Unknown