諧振接地系統(tǒng)暫態(tài)選線啟動條件研究
曾振松,王鵬
國網(wǎng)福建省電力有限公司三明供電公司,福建 三明 365000
摘 要:介紹了HHT時頻分析法并將其應(yīng)用于系統(tǒng)母線暫態(tài)故障特征量的提取,提出了一種采用HHT時頻分析法的諧振接地系統(tǒng)暫態(tài)選線啟動判據(jù)。采用MATLAB的SPS工具箱搭建仿真模型,通過對系統(tǒng)在四種典型及多種不同接地故障條件下的仿真分析,驗證了所提算法的準(zhǔn)確性優(yōu)于傳統(tǒng)判據(jù)。
關(guān)鍵詞:諧振接地系統(tǒng);暫態(tài)選線啟動條件;HHT時頻分析法
中圖分類號:TM711 文獻(xiàn)標(biāo)識碼:A 文章編號: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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