Journal
JOURNAL OF MODERN POWER SYSTEMS AND CLEAN ENERGY
Volume 9, Issue 5, Pages 1066-1075Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.35833/MPCE.2020.000237
Keywords
Frequency control; Rotors; Wind speed; Wind power generation; Doubly fed induction generators; Wind turbines; Power system dynamics; Doubly-fed induction generator (DFIG)-based wind turbine; virtual inertia control; primary frequency control; power reserve control; wake interaction
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Funding
- Natural Science Foundation of China [72071100]
- Guangdong Basic and Applied Basic Research Fund [2019A1515111173]
- Young Talent Program [2018KQNCX223]
- Department of Education of Guangdong Province
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This study proposes a novel frequency control scheme for DFIG-based wind turbines, which takes into account the wake effect and incorporates virtual inertia control and primary frequency control. The control gains are adaptively adjusted according to wind turbine operation status for better frequency regulation performance. Extensive case studies and simulation results confirm significant improvements in frequency behavior with the proposed control scheme.
With the increasing share of wind power, it is expected that wind turbines would provide frequency regulation ancillary service. However, the complex wake effect intensifies the difficulty in controlling wind turbines and evaluating the frequency regulation potential from the wind farm. We propose a novel frequency control scheme for doubly-fed induction generator (DFIG)-based wind turbines, in which the wake effect is considered. The proposed control scheme is developed by incorporating the virtual inertia control and primary frequency control in a holistic way. To facilitate frequency regulation in time-varying operation status, the control gains are adaptively adjusted according to wind turbine operation status in the proposed controller. Besides, different kinds of power reserve control approaches are explicitly investigated. Finally, extensive case studies are conducted and simulation results verify that the frequency behavior is significantly improved via the proposed control scheme.
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