Open AccessComparative study on primary frequency control schemes for variable‐speed wind turbines
Author(s) -
Wang Siying,
Hu Jiabing,
Wang Shuo,
Tang Haiyan,
Chi Yongning
Publication year - 2017
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2017.0547
Subject(s) - automatic frequency control , control theory (sociology) , frequency response , wind power , computer science , frequency grid , inertia , induction generator , matlab , electric power system , variable speed wind turbine , turbine , permanent magnet synchronous generator , grid , control engineering , power (physics) , control (management) , engineering , mathematics , electrical engineering , telecommunications , mechanical engineering , physics , geometry , classical mechanics , quantum mechanics , artificial intelligence , operating system
Wind generation have played an important role in the total generation mix in power systems in order to meet the need of environment regulations. The stability of the system frequency may be reduced due to the increasing penetration of wind power, which has attracted wide attention. Several studies have tried to provide the frequency support strategies, but all lack the intensive research of generator frequency response characteristics, the foundation of understanding the system frequency dynamic. To consider the frequency response in weak grid, especially with various complicated control schemes, the uniform comparison is needed. On this basis, this study focuses on wind generators with inertia control and primary frequency control, which can be classified with different strategies and power point track operation. Comparison of the frequency response about synchronous generators, external characteristics (such as turbine inertia and frequency response speed) with typical control schemes and the preliminary idea about modelling is proposed. The simulation result in Matlab/Simulink with the example of doubly‐fed induction generator (DFIG) model shows the difference between typical control methods with measurable external behaviours. In addition, the idea and simulation in this paper can be applied to optimise primary frequency control strategies and understand the dynamic of system frequency.