GROUP-BASED BCU METHODS FOR ON-LINE DYNAMICAL SECURITY ASSESSMENTS AND ENERGY MARGIN CALCULATIONS OF PRACTICAL POWER SYSTEMS

摘要

This invention relates to a method of determiningstability of unstable equilibrium point (UEP) computedby using BCU method, comprising selecting UEP computedby using BCU method, obtaining a test vector X test forthe selected UEP, say X UEP using the following equation:(see formula I)where (see formula 2) is the SEP, and checking boundarycondition of X UEP by simulating system trajectory ofpost-fault original system starting from X test.