• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Operating strategies to preserve the adequacy of power systems circuit breakers.
【24h】

Operating strategies to preserve the adequacy of power systems circuit breakers.

机译：保持电力系统断路器充足性的操作策略。

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

The objective of the proposed research is to quantify the limits of overstressed and aging circuit breakers in terms of probability of failure and to provide guidelines to determine network reconfigurations, generator commitment, and economic dispatch strategies that account for these limits. These temporary power system operating strategies address circuit breaker adequacy issues, and overstressed breakers can be operated longer and more reliably until they are replaced with adequate equipment.;The expansion of electric networks with new power sources (nuclear plants, distributed generation) results in increased short-circuit (fault) currents levels. A number of circuit breakers do not have sufficient ratings to interrupt these increased faults currents. These breakers are said to be overstressed (underrated, inadequate). Because of their insufficient ratings, overstressed breakers are subject to increased failure probabilities. Extensive common-mode outages caused by circuit breaker failures reduce the reliability of power systems. To avoid outages and system unreliability, overstressed breakers must eventually be replaced.;The replacement of overstressed breakers cannot be completed in a short time because of budgetary limits, capital improvement schedules, and manufacturer-imposed constraints. Meanwhile, to preserve the ability of old and overstressed breakers to safely interrupt faults, short-circuit currents must be kept within the limits imposed by the ratings and the age of these breakers, using the substation reconfiguration and generator commitment strategies described in this study.;The immediate benefit of the above-mentioned operating strategies is a reduction of the failure probability of overstressed breakers obtained by avoiding the interruption of currents in excess of breaker ratings. Other benefits include (i) more reliable network operation, (ii) restored operating margins with respect to existing equipment, and (iii) prioritized equipment upgrades that enable improvements in power systems planning.;The proposed work is illustrated using a three-phase, breaker-oriented 24-substation test system that extends the existing IEEE Reliability Test System.
机译：拟议研究的目的是根据故障的可能性来量化过应力和老化断路器的极限，并为确定网络重新配置，发电机承诺和考虑这些极限的经济调度策略提供指导。这些临时的电力系统运行策略可解决断路器的充足性问题，并且在用足够的设备替换之前，过负荷的断路器可以运行更长且更可靠的断路器。;使用新电源（核电站，分布式发电）的电网扩展导致短路（故障）电流水平。许多断路器没有足够的额定值来中断这些增加的故障电流。据说这些断路器承受的压力过大（被低估，不足）。由于额定值不足，承受过大压力的断路器会增加故障概率。断路器故障导致的广泛共模中断会降低电力系统的可靠性。为避免中断和系统不可靠，最终必须更换压力过大的断路器。由于预算限制，资本改善计划和制造商施加的限制，压力过大的断路器的更换无法在短时间内完成。同时，为了保持旧的和过载的断路器安全地中断故障的能力，必须使用本研究中描述的变电站重新配置和发电机承诺策略，将短路电流保持在这些断路器的额定值和寿命所施加的限制内。 ；上述操作策略的直接好处是通过避免电流的中断超过断路器的额定值而降低了过应力断路器的故障概率。其他好处包括（i）更可靠的网络运行，（ii）相对于现有设备恢复的运行裕度，以及（iii）优先进行设备升级以改善电力系统规划。面向断路器的24子站测试系统，扩展了现有的IEEE可靠性测试系统。

著录项

  • 作者

    Dam, Quang Binh.;

  • 作者单位

    Georgia Institute of Technology.;

  • 授予单位 Georgia Institute of Technology.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2009
  • 页码 193 p.
  • 总页数 193
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 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