Warning of inter-area mode oscillation based on CBR and OAPID for interconnected power grids

A method of inter-area mode oscillation prediction based on CBR(Case-Based Reasoning) theory and OAPID(Oscillatory Active Power Increment Distribution) theory is proposed for interconnected power grids,which,based on the measurements of WAMS(Wide Area Measurement System),issues the warning of inter-area mode oscillation before low-frequency system oscillation occurs and provides the advice of system operating mode adjustment during system oscillation to improve system damping.Results of a test for a regional power grid according to its actual WAMS data demonstrate the feasibility and effectiveness of the proposed method.