Fault ride-through (FRT) requirement is a matter of great concern for doubly fed induction generator (DFIG-) based wind turbines (WTs). This study presents a nonlinear variable resistor- (NVR-) based bridge-type fault current limiter (BFCL) to augment the FRT performance of DFIG-based WTs. First, the BFCL operation and nonlinear control design consideration of the proposed NVR-based BFCL are presented. Then, the NVR-BFCL performance is validated through simulation in PSCAD/EMTDC software. In addition, the NVR-based BFCL performance is compared with the fixed resistor- (FR-) based BFCL for a three-phase symmetrical short circuit fault at the grid side. Simulation results reveal that the NVR-based BFCL provides a smooth and effective FRT scheme and outperforms the FR-based BFCL.

中文翻译：

---

基于非线性可变电阻器的 FCL 用于基于双馈电机的风力涡轮机的故障穿越性能增强

故障穿越 (FRT) 要求是基于双馈感应发电机 (DFIG) 的风力涡轮机 (WT) 的一个重要问题。本研究提出了一种基于非线性可变电阻器 (NVR) 的桥式故障限流器 (BFCL)，以增强基于 DFIG 的 WT 的 FRT 性能。首先，提出了基于 NVR 的 BFCL 的 BFCL 操作和非线性控制设计考虑。然后，通过 PSCAD/EMTDC 软件中的仿真验证 NVR-BFCL 性能。此外，针对电网侧的三相对称短路故障，将基于 NVR 的 BFCL 性能与基于固定电阻器 (FR-) 的 BFCL 性能进行了比较。仿真结果表明，基于 NVR 的 BFCL 提供了平滑有效的 FRT 方案，并且优于基于 FR 的 BFCL。