Abstract

Wind power generation is observing a significant use of doubly-fed induction generator (DFIG) due to its improved efficiency, but the converter used in the configuration is sensitive to the presence of a fault in the grid. This paper presents a fault ride-through (FRT) configuration, which includes a thyristor-based bridge-type non-superconducting fault current limiter (ThyBT-NSFCL) augmented with a buck converter. It has been observed that the proposed topology works fine under a temporary symmetrical fault. The analytical analysis has been carried out to observe the operating principle of the proposed ThyBT-NSFCL under both normal and fault conditions. A comparative study with other topologies such as switched impedance transformer-type non-superconducting fault current limiter (TT-NSFCL), series dynamic breaking resistor (SDBR), and without any current limiter (WCL) have been done to show the effectiveness of the proposed topology. The simulation results show that the proposed ThyBT-NSFCL is a better fault current limiter as compared with other limiters like TT-NSFCL, SDBR, and WCL. The simulation of the proposed ThyBT-NSFCL connected in series with a DFIG system is carried out using PSCAD/EMTDC software. The performance of the proposed topology is quite good, and it can be used as a reliable limiter for future wind energy applications.

摘要

由于双馈感应发电机 (DFIG) 的效率提高，风力发电正在大量使用，但该配置中使用的转换器对电网中是否存在故障很敏感。本文介绍了一种故障穿越 (FRT) 配置，其中包括一个基于晶闸管的桥式非超导故障限流器 (ThyBT-NSFCL)，并增加了一个降压转换器。已经观察到所提出的拓扑在临时对称故障下工作良好。已进行分析分析以观察所提出的 ThyBT-NSFCL 在正常和故障条件下的工作原理。与其他拓扑结构的对比研究，如开关阻抗变压器型非超导故障限流器（TT-NSFCL）、串联动态断路电阻器（SDBR）、并且没有任何电流限制器（WCL）已经完成以显示所提出的拓扑的有效性。仿真结果表明，与 TT-NSFCL、SDBR 和 WCL 等其他限制器相比，所提出的 ThyBT-NSFCL 是一种更好的故障电流限制器。所提出的与 DFIG 系统串联的 ThyBT-NSFCL 的模拟是使用 PSCAD/EMTDC 软件进行的。所提出的拓扑的性能非常好，可以用作未来风能应用的可靠限制器。所提出的与 DFIG 系统串联的 ThyBT-NSFCL 的模拟是使用 PSCAD/EMTDC 软件进行的。所提出的拓扑的性能非常好，可以用作未来风能应用的可靠限制器。所提出的与 DFIG 系统串联的 ThyBT-NSFCL 的模拟是使用 PSCAD/EMTDC 软件进行的。所提出的拓扑的性能非常好，可以用作未来风能应用的可靠限制器。