A New Algorithm for Transformer Sympathetic Inrush Identification Based on Voltage Increment
Sympathetic inrush may cause mal-operation of transformer differential protection,and affect the normal transformer operation,but at present there are few effective methods to identify sympathetic inrush.The malfunction simulation analysis of the on-load operation of transformer indicates that the interaction between inrush transient saturation and CT transient saturation result in the transformer differential protection mal-operation.Considering that the transformer terminal voltage rises slowly during the mal-operation,but drops during internal fault,this research puts forward a new algorithm for transformer sympathetic inrush identification based on voltage increment.A large number of simulation experiments have verified its effectiveness and feasibility.
NETL
NSTL
万方数据
维普
