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.

中文翻译：

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基于DFIG的风电场的全分布式卸载操作以实现负载共享

针对参与系统有功功率调节的基于DFIG的风电场（WF），提出了一种基于系统级共识的卸载操作。协调转子超速控制（ROC）和桨距角控制（PAC），以在每个风力涡轮机（WT）之间共享负载。对于ROC，开发了一种新颖的完全分布式共识协议，用于公平的负载共享控制，而无需知道总的有功功率容量。考虑到风力发电机的个体差异和转子速度限制的影响，共识协议中涉及的WT的数量会根据其变化的工作点进行动态调整。此外，针对有功功率设定点分配设计了分布式优化策略，以减少PAC期间WF俯仰角的利用。作为结果，所提出的策略可以充分，快速地提取出可用的转子超速裕量，从而在ROC阶段具有较高的动能存储和更好的动态性能，并且在面对更深的卸载操作时，可以进一步减小对桨距角的依赖性。案例研究证明了该方案的有效性。