• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Fault analysis and protection of Doubly Fed Induction Generator-based wind farms.
【24h】

Fault analysis and protection of Doubly Fed Induction Generator-based wind farms.

机译：基于双馈感应发电机的风电场的故障分析和保护。

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

Scope and Method of Study. The purpose of this thesis is to study the fault current behavior of a wind farm with Doubly Fed Induction Generators (DFIG), and identify the electrical protection requirements for a large wind farm. Brief description of wind energy conversion systems including types of wind turbine generators are given in the beginning of the thesis followed by a review of induction machine modeling and the special modeling considerations for a DFIG during a short circuit condition. Fault calculations using symmetrical components and factors which determine the fault current contribution are also discussed. A nine MW wind farm with six units of 1.5 MW DFIGs are modeled using Matlab/Simulink/SimPowerSystems and simulated for symmetrical and asymmetrical faults within the wind farm and in the power system close to the wind farm. Voltage and current profiles are observed for pre-fault, fault and post-fault periods and the results are presented and discussed.;Findings and Conclusions. The simulated voltage and current waveforms during faults nearly conform with the ideal conditions expected. This gives a clear view of each phase current and phase voltage behavior during different fault conditions. Knowledge of fault levels in a wind farm is important in determining the ratings of current transformers, voltage transformers and circuit breakers. Further, protection functions are graded and settings are selected based on the fault current contribution from the wind turbine generators and the power system.
机译：研究范围和方法。本文的目的是研究采用双馈感应发电机（DFIG）的风电场的故障电流行为，并确定大型风电场的电气保护要求。本文的开头对风能转换系统（包括风力涡轮发电机的类型）进行了简要说明，随后回顾了感应电机建模以及在短路条件下双馈发电机的特殊建模注意事项。还讨论了使用对称分量和确定故障电流贡献的因素进行故障计算。使用Matlab / Simulink / SimPowerSystems对具有六个单元1.5 MW DFIG的9 MW风电场进行了建模，并针对风电场内以及靠近风电场的电力系统中的对称和非对称故障进行了仿真。在故障前，故障和故障后期间观察电压和电流曲线，并介绍和讨论结果。故障期间模拟的电压和电流波形几乎符合预期的理想条件。这样可以清楚地了解不同故障条件下的每相电流和相电压行为。了解风电场中的故障级别对于确定电流互感器，电压互感器和断路器的额定值很重要。此外，对保护功能进行分级，并根据来自风力涡轮发电机和电力系统的故障电流贡献来选择设置。

著录项

  • 作者

    Mahadanaarachchi, Viraj Pradeep.;

  • 作者单位

    Oklahoma State University.;

  • 授予单位 Oklahoma State University.;
  • 学科 Engineering Electronics and Electrical.;Energy.
  • 学位 M.S.
  • 年度 2009
  • 页码 105 p.
  • 总页数 105
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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