摘要
在对两种传统的序分量比相选相元件的动作特性进行深入分析的基础上 ,提出了一种基于模糊逻辑的新型故障序分量选相元件。该元件应用模糊逻辑思想 ,将Δ I·1/I·2 和 I·0 /I·2 两种序分量比相选相元件有机地融合在一起 ,充分发挥了序分量比相选相元件的优势。该元件能够仅通过故障相区的比较就实现故障选相 ,不需配合其他判别方法 ,也不需要用户进行整定计算。仿真结果表明 ,通过合理地设置选相判据的权重以及动作阈值 ,可以使选相结果基本不受过渡电阻和系统运行方式的影响 。
This paper proposes a new phase selector based on fault sequence components and fuzzy logic theory by the deep analysis upon the operating characteristics of traditional phase selector. Fuzzy logic is adopted in this selector and the traditional methods of ΔI· 1/I· 2 and I· 0/I· 2 are well united and utilized. Setting calculations and auxiliary criterions are no more needed because phase selection can be realized by the comparison of fault zones in the phase plane. Simulation results have revealed that this selector can make an accurate phase selection with suitable weighting factors and thresholds. With less influence of operation modes and earth resistances, this selector has high reliability and robustness.
出处
《电力系统自动化》
EI
CSCD
北大核心
2003年第12期41-44,74,共5页
Automation of Electric Power Systems
关键词
线路保护
序分量
选相
模糊逻辑
line protection
sequence components
phase selection
fuzzy logic
