Abstract：The identification and transform of fault information is the basis for the relay protection. For the fault waveforms of DC traction network, the energy spectrum of traction load current is defined, the eigenvector is constructed. The energy spectrum protection method is a new way which realizes state identification and fault diagnosis. The experiment shows the fault information can be extracted effectively by energy spectrum analysis; the mode space can be divided by the eigenvector. The protection method of energy spectrum enhances the sensitivity.
李夏青, 左丽. 直流牵引网故障电流能量谱及特征矢量[J]. 电工技术学报, 2010, 25(11): 164-168.
Li Xiaqing, Zuo Li. Energy Spectrum and Eigenvector of DC Traction Power Supply Short-Circuit Current. Transactions of China Electrotechnical Society, 2010, 25(11): 164-168.
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2010, Vol. 25 
