期刊
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
卷 12, 期 1, 页码 430-440出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TSTE.2020.3002690
关键词
Rotors; Wind turbines; Picture archiving and communication systems; Kinetic energy; Regulation; Wind power generation; Wind speed; DFIG-based wind farm; consensus-based distributed control; deloading operation; rotor overspeeding control; pitch angle control
A system-level consensus-based deloading operation is proposed for DFIG-based wind farms participating in system active power regulation. Novel fully-distributed consensus protocol and optimization strategy are developed for fair load sharing control and active power setting points allocation to improve the system performance. Case studies demonstrate the effectiveness of the proposed scheme in enhancing dynamic performance and reducing dependency on pitch angle during deloading operation.
A system-level consensus-based deloading operation is proposed for DFIG-based wind farm (WF) participating in system active power regulation. Rotor overspeeding control (ROC) and pitch angle control (PAC) are coordinated for load sharing among each wind turbine (WT). For ROC, a novel fully-distributed consensus protocol is developed for fair load sharing control without the need to know the total active power capacity. Considering the influences of wind turbines' individual differences and rotor speed limit, the amount of WTs involved in consensus protocol are dynamically adjusted according to their varying operating points. Further, a distributed optimization strategy is designed for active power setting-points allocation to curtail the utilization of WF's pitch angle during PAC. As the result, the proposed strategy can fully and quickly extract the available rotor overspeeding margin for a high kinetic energy storage and a better dynamic performance in ROC stage, and further minimize the dependency on pitch angle when facing deeper deloading operation. Case studies demonstrate the effectiveness of the proposed scheme.
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