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首页> 外文期刊>Electric power systems research >Strengths and limitations of a new phasor estimation technique to reduce CCVT impact in distance protection
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Strengths and limitations of a new phasor estimation technique to reduce CCVT impact in distance protection

机译:一种新的相量估算技术的优缺点,可减少CCVT对距离保护的影响

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摘要

This paper evaluates the performance of a new least squares approach that improves the accuracy and speed of convergence of the voltage phasors estimated during CCVT transient conditions. A justification of the validity of the linear mathematical model for the CCVT used is provided together with a short study about the risk of transient ferroresonance. Also, a discussion is presented about operating times of numerical distance relays and the importance of the new phasor estimation considered. The methodology followed to achieve a realistic evaluation in a variety of scenarios is presented. The results show the improvements achievable in most conditions, but also highlight an example scenario where the new method has limitations.
机译:本文评估了一种新的最小二乘方法的性能,该方法可提高CCVT瞬态条件下估算的相量电压的准确性和收敛速度。提供了使用CCVT的线性数学模型有效性的证明,以及有关短暂铁磁谐振风险的简短研究。另外,还讨论了数字距离继电器的工作时间以及所考虑的新相量估计的重要性。介绍了在各种情况下实现逼真的评估所遵循的方法。结果显示了在大多数情况下可以实现的改进,但同时也强调了新方法有局限性的示例方案。

著录项

  • 来源
    《Electric power systems research》 |2010年第4期|417-425|共9页
  • 作者单位

    Power System Research Group, Department of Electrical and Computer Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada;

    Power System Research Group, Department of Electrical and Computer Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada;

    Power System Research Group, Department of Electrical and Computer Engineering, University of Saskatchewan, 57 Campus Drive, Saskatoon, SK S7N 5A9, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    coupling capacitor voltage transformer; distance relays; phasor estimation; least squares method;

    机译:耦合电容器电压互感器;距离继电器;相量估计;最小二乘法;

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