Fast analysis of stability using EEAC and simulation technologies

Quantitative methods for both transient stability assessment and control decision making are urgently required for coordinating the economy and security of the power market. These methods should be able to identify all potentially unstable modes, to show their stability margins, to recognize dangerous reloading directions, to calculate their limits of generation and interface flow, to estimate the stability domain in the injection space and to optimize preventive/emergency actions. Besides, it should be fast enough for tracking system changes. FASTEST integrates EEAC, a unique and rigorously quantitative method, with numerical integration software such as ETMSP, a state-of-the-art time domain simulation program, is just such a tool. This paper presents its principle, development and applications