• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Electric Power Components and Systems >An Enhanced LVRT Scheme for DFIG-based WECSs under Both Balanced and Unbalanced Grid Voltage Sags
【24h】

An Enhanced LVRT Scheme for DFIG-based WECSs under Both Balanced and Unbalanced Grid Voltage Sags

机译：平衡和不平衡电网电压暂降下基于DFIG的WECS的增强LVRT方案

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Due to the latest grid codes, wind energy conversion systems (WECSs) are required to remain connected to grid under grid voltage sags and supply reactive power into the grid. So, this paper proposes an enhanced scheme to improve low-voltage ride through (LVRT) capability of doubly fed induction generator (DFIG)-based WECSs under both balanced and unbalanced grid voltage sags. The proposed scheme is composed of active and passive LVRT compensators. The active compensator is performed by controlling the rotor- and grid-side converters of the DFIG to decrease the stator flux oscillations and inject reactive power into the grid. The passive compensator is based on a three-phase stator damping resistor (SDR) located in series with the stator windings. The proposed scheme decreases the negative effects of grid voltage sags in the DFIG system including the rotor over-currents, electromagnetic torque oscillations, and DC-link over-voltage and also injects reactive power into grid to support the grid voltage. So, the LVRT capability of DFIG is enhanced and new grid code requirements are addressed. Simulation results on a 1.5-MW DFIG-based WECS using MAT-LAB/Simulink demonstrate the effectiveness of the proposed LVRT scheme under both balanced and unbalanced grid voltage sags.
机译：由于最新的电网法规，要求风能转换系统（WECS）在电网电压骤降下保持与电网的连接，并向电网提供无功功率。因此，本文提出了一种增强的方案，以在平衡和不平衡电网电压骤降下提高基于双馈感应发电机（DFIG）的WECS的低压穿越（LVRT）能力。该方案由有源和无源LVRT补偿器组成。有源补偿器是通过控制DFIG的转子侧和电网侧转换器来执行的，以减少定子磁通振荡并将无功功率注入电网。无源补偿器基于与定子绕组串联的三相定子阻尼电阻（SDR）。提出的方案减少了DFIG系统中电网电压骤降的负面影响，包括转子过电流，电磁转矩振荡和直流母线过电压，并且还将无功功率注入电网以支持电网电压。因此，增强了DFIG的LVRT功能，并满足了新的网格代码要求。使用MAT-LAB / Simulink在基于1.5 MW DFIG的WECS上进行的仿真结果证明了所提出的LVRT方案在平衡和不平衡电网电压骤降下均有效。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号