A Quasi-Exponential Transform for Unstable Modes Calculation of Large-Scale Power Systems

The calculation of the unstable eigenvalues without omission is vital in small signal stability analysis of power systems. In this letter, a quasi-exponential transform is proposed to compute all unstable eigenvalues with improved efficiency and accuracy. Numerical experiments on two public source systems, namely the Xingo6u and Juba5723 systems, show the effectiveness of the proposed method.