In order to enable the permanent magnet synchronous generator (PMSG)-based wind turbine (WT) to capture more wind energy while providing fast frequency supports effectively during disturbances, this paper proposes a time-sharing frequency coordinated control (TFCC) strategy. Firstly, a rotor virtual inertia control and a DC-link virtual inertia control are presented, and a new adaptive frequency droop control considering frequency deviation is proposed. Secondly, a novel TFCC strategy, which uses the frequency dead-band to coordinate the frequency regulation priority of above three controls, is proposed. With the proposed strategy, the electrostatic energy stored in the DC capacitor is always first utilized for frequency support, while the rotor rotational kinetic energy is only applied when the DC capacitor energy is used up. Finally, the control performance is studied in PSCAD/EMTDC, whose results indicate that the TFCC has better performance in terms of wind energy harvesting and system stability as compared to traditional coordinated control and cascading control, respectively.

中文翻译：

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基于PMSG的风力发电机分时频率协调控制策略


为了使基于永磁同步发电机（PMSG）的风力发电机（WT）能够捕获更多的风能，同时在扰动期间有效提供快速频率支持，提出一种分时频率协调控制（TFCC）策略。首先提出了转子虚拟惯量控制和直流环节虚拟惯量控制，并提出了一种考虑频率偏差的自适应频率下垂控制。其次，提出了一种新颖的TFCC策略，利用频率死区来协调上述三种控制的频率调节优先级。采用所提出的策略，存储在直流电容器中的静电能始终首先用于频率支持，而转子旋转动能仅在直流电容器能量用完时才应用。最后，在PSCAD/EMTDC中对控制性能进行了研究，结果表明，与传统的协调控制和级联控制相比，TFCC在风能收集和系统稳定性方面分别具有更好的性能。