Key Technology to Prevent Cascading Overload Trips in Smart Grid

This research focuses on the application of the key technology to prevent cascading overload trips in smart grid.A method is proposed to determine correlative transmission section of overload lines,combined with real-time power flow information;a back-up protection criterion is formulated,combined with transmission section;the emergent control strategy is discussed,including the control mode for selecting control points,determining control quantity,and eliminating overload.