谐振接地系统暂态选线启动条件研究
曾振松,王鹏
国网福建省电力有限公司三明供电公司,福建 三明 365000
摘 要:介绍了HHT时频分析法并将其应用于系统母线暂态故障特征量的提取,提出了一种采用HHT时频分析法的谐振接地系统暂态选线启动判据。采用MATLAB的SPS工具箱搭建仿真模型,通过对系统在四种典型及多种不同接地故障条件下的仿真分析,验证了所提算法的准确性优于传统判据。
关键词:谐振接地系统;暂态选线启动条件;HHT时频分析法
中图分类号:TM711 文献标识码:A 文章编号:1007-3175(2014)08-0038-05
Research on Start Condition for Transient Line Selection in Resonant Earthed System
ZENG Zhen-song, WANG Peng
Sanming Power Company, Fujian Electric Power Co., Ltd of State Grid, Sanming 365000, China
Abstract: Introduction was made to the HHT time frequency analysis method and the method was applied in extraction of transient fault signature values of system bus. This paper proposed a kind of resonant earthed system’s start criterion for transient line selection adopting the HHT time frequency analysis method. The simulation model was built up by the SPS toolbox in Matlab. The simulation analysis of resonant earthed system in four special and several different fault conditions verifies that the accuracy of the proposed algorithm is superior to that of the traditional criterion.
Key words: resonant earthed system; start condition for transient line selection; HHT time frequency analysis method
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