Research on Low Current Grounding Electric Network Fault Line Selection
Abstract：The 35 kV or below power distribution network in China and small current grounding system single phase occurs single grounding,there is less difference between normal lines and fault line transient zero sequence current,which affects the precision of line selection.In view of this,one kind of digital filter is designed.The pure fault component of zero sequence current is extracted and the data is being analyzed,combined with substation automation generatrix insulate monitoring device and automation reclose device,the fault line is selected.The theoretical analysis and Matlab simulation experiment indicates the accuracy and reliability of line selection method has improved significantly.
Keywords：correlation analysiszero sequence currentfault line selectionauto-reclose
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 12-15 )