Xudong Zou

TL;DR: In this paper, an improved control strategy which uses virtual resistance to limit rotor side overcurrents is proposed, which can make a crowbar inactive and supply reactive power to fulfill the latest grid code requirement during voltage sags.

TL;DR: In this article, an inductance-emulating control strategy for doubly fed induction generator (DFIG)-based wind turbines is proposed to suppress the post-fault rotor current, thereby enhancing its lowvoltage ride through capability.

TL;DR: An improved design of current controller, i.e., proportional–integral controller and capacitor-current-feedback active damping, is proposed to reduce the negative effect of PLL on current control and has a strong robustness against wide-range variation of grid impedance.

TL;DR: An improved design of PLL controller parameters is proposed to mitigate the negative effect of P LL on the current control in weak grid, and not only the dynamic and static response performance of Pll independent system can be maintained, but also the negative influence of Poll dynamic on theCurrent control can be effectively reduced inWeak grid.

TL;DR: Under the proposed method, the additional feedforward of rotor current references is introduced into the current loop to improve its tracking capability of the aforementioned ac current references, thereby achieving the transient control targets precisely.