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The accuracy of the transient stability assessment provided by transient energy function method depends on the determination of the controlling unstable equilibrium point (CUEP). However, it is still an uncompleted problem to determine the CUEP fastly and accurately. This paper discusses the CUEP calculation methods, such as the BCU method, the dynamic PEBS method and the shadowing method, and then...
This paper presents an approach to estimate the critical clearing time (CCT) of the multi-machine power systems based on the quadratic surface which approximates the boundary of stability region relating to the controlling unstable equilibrium point. While obtaining the coefficient matrix of the second order term of the quadratic approximation, we partition the coefficient matrix into four blocks...
This paper presents an approach to estimate the critical clearing time (CCT) of the multi-machine power systems based on the quadratic surface which approximates the boundary of stability region relating to the controlling unstable equilibrium point. A decomposition method is developed to obtain the coefficients of the quadratic approximation surface. The CCT is determined by the crossing point of...
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