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 determining stability of unstable equilibrium point (UEP) computed by using BCU method, comprising selecting UEP computed by using BCU method, obtaining a test vector X test for the selected UEP, say X UEP using the following equation: (see formula I) where (see formula 2) is the SEP, and checking boundary condition of X UEP by simulating system trajectory of post-fault original system starting from X test.