Study on the influence and suppression measures of HVDC bias to transformer
Abstract：Ningdong ± 660 kV high voltage direct current transmission projects under way will enable grounding transformer DC magnetic biasing phenomenon very near.DC bias is a type of transformer＇s abnormal operating state,which can endanger the safe operation of power grid.The research and development of technology of in-line capacitance method for direct current isolation transformer neutral point grounding device applied of ZnO valve block and large capacity fast-switched capacitor dual protection,which effectively blocking DC current of transformer neutral point inflows,avoiding the occurrence of transformer DC magnetic biasing appeared,ensuring stable operation of power system security.
Keywords：± 660 kVHVDCtransformerDC bias
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( 700-703 )