• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Advanced Power System Automation and Protection (APAP), 2011 International Conference on >Analysis on and precautions against large-scale wind turbines off-grid
【24h】

Analysis on and precautions against large-scale wind turbines off-grid

机译：大型风力发电机组离网分析及防范措施

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

In the last few months, off-grid accidents of a large number of wind turbines in several large-scale wind power bases frequently occurred during the windy weather, severely threatening not only secure operation of wind farms but also secure the stable operation of power grid. This paper analyzes the cause of the “2.24” large scale wind turbines off-grid and other accidents, having found some common problems of the existing wind farms: firstly, almost none of wind turbines in operation has the low voltage ride through (LVRT) capability; secondly, dynamic reactive power compensation devices are functionally in-complete and chaotically managed; thirdly, poor construction techniques and equipment in-stallation are found in wind farms; fourthly, the main control system functions of wind turbines haven''t been unveiled to users, and their coordinated control strategies do not meet the requirements, which demand wind turbines keep on-grid during grid voltage instantaneously drop; fifthly, all 35kV (10kV) systems in wind farms are not grounded, in which the single-phase grounding can quickly develop into phase to phase or three-phase fault to exaggerate the accident. Besides, the small current grounding line in 35kV systems is not reliable. In the current situation, this paper proposed countermeasures how to prevent large-scale wind turbine off-grid accidents, generally speaking, rectifying wind turbine LVRT capacity, refreshing wind turbine protection programs, opening reactive power regulation function of wind turbines, optimizing small current grounding line as well as improving the functions of dynamic reactive power compensation devices and strengthening the management of use, etc.
机译：在过去的几个月中，在刮风的天气中，经常在几个大型风力发电基地发生大量风力发电机的离网事故，不仅严重威胁着风电场的安全运行，而且还威胁到电网的稳定运行。 。本文分析了“ 2.24”大型风轮机离网和其他事故的原因，发现了现有风电场的一些常见问题：首先，几乎所有运行中的风轮机都没有低穿越电压（LVRT）能力;其次，动态无功补偿装置的功能不完善，管理混乱。第三，风电场的建设技术和设备安装不力。第四，尚未向用户透露风机的主要控制系统功能，其协调控制策略不符合要求，要求风机在电网电压瞬间下降时保持并网。第五，风电场的所有35kV（10kV）系统均未接地，单相接地会迅速发展为相间或三相故障，从而加剧事故。此外，35kV系统中的小电流接地线也不可靠。在目前的情况下，本文提出了如何预防大型风力发电机离网事故的对策，一般来讲，纠正风力发电机的LVRT容量，更新风力发电机的保护程序，开放风力发电机的无功调节功能，优化小电流接地线，以及改善动态无功补偿装置的功能，加强使用管理等。

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