• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Beijing international conference on power transmission distribution technology >Optimizing Security and Sensitivity for Line Differential Protection Applications
【24h】

Optimizing Security and Sensitivity for Line Differential Protection Applications

机译：优化线路差分保护应用的安全性和灵敏度

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Numerical phase segregated line differential relays employing digital communications over dedicated or multiplexed communication networks have been employed for various types of line topologies for numerous reasons: 1. Electrically short lines 2. High and variable load transport with directional changes ("wild" power systems) 3. Taps on electrically short lines 4. Lines subject to power swings 5. Multiple and variable mutual coupling situations in power corridors 6. Unavailability of VTs for distance measurement, or difficulty obtaining polarizing quantities due to system configuration Key to the security and sensitivity of these relay systems is how they handle the effects of the following situations for in zone and out of zone faults: 1. Measurement error due to CT loading 2. Measurement error due to CT saturation for heavy currents 3. Different DC decay times due to different CT set secondary circuit time constants 4. Application of differently rated CT sets with different saturation thresholds and secondary CT circuit time constants 5. Timing errors if applied in multiplexed systems with split path possibilities (switched networks) 6. External events such as out of zone transformer switching with accompanying inrush and effects on different CT sets 7. Clearing of external faults where the CT sets have different rates of DC offset (and therefore decay) due to different CT secondary circuit X/R component 8. Sensitivity of switch onto fault detection We will explore the use of an adaptive strategy to automatically select the optimal element for security and sensitivity when challenged by the above situations. We will also explore the use of dynamic restraining techniques to accommodate rapidly changing conditions of CT loading, CT saturation and communication network timing errors.
机译：用于各种类型的线拓拓在许多原因采用了在专用或多路复用通信网络上采用数字通信的数值相隔离线差分继电器：1。电气短路2.用方向变化（“野生”电源系统）高和可变负载传输（“野生”电源系统） 3.电气短路4.电源旋转的线路5.电源走廊的多个和可变相互耦合情况6. VTS用于距离测量的VTS，或者由于系统配置键对安全性和灵敏度而难以获得偏振量这些继电器系统是它们如何处理下列域内和区域故障的效果：1。由于CT负载引起的测量误差2.由于CT饱和度的测量误差为大电流3.由于不同的直流衰减时间CT集次级电路时间常数4.不同额定CT套装的应用不同的饱和度n阈值和次要CT电路时间常数5.如果应用于具有分割路径可能性的多路复用系统（交换网络）6，则定时误差6.外部事件（例如外部事件）超出区域变压器切换，随附涌入和不同CT框架的效果7.清除外部由于不同的CT次电路X / R组件，CT组具有不同的DC偏移量（以及因此衰减）的故障.P.Stopt到故障检测的灵敏度我们将探讨使用自适应策略来自动选择最佳元素在上述情况挑战时的安全性和敏感性。我们还将探讨使用动态限制技术，适应CT负载，CT饱和度和通信网络定时误差的快速变化条件。

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