谐振接地系统暂态选线启动条件研究

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。%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 veriifes that the accuracy of the proposed algorithm is superior to that of the traditional criterion.