Closure of “Definition and Classification of Power System Stability”

Regional frequency response analysis under normal and emergency conditions

“…The frequency stability may be a short-term phenomenon or a longterm phenomenon. During frequency excursions, the characteristic times of the processes and devices that are activated will range from fraction of seconds, corresponding to the response of devices such as UFLS and generator controls and protections, to several minutes, corresponding to the response of devices such as prime mover energy supply systems and load voltage regulators [20]. The supplementary control response is usually slower than primary response and much slower than emergency dynamic response (e.g., load shedding).…”

New approach for the nonlinear programming with transient stability constraints arising from power systems

“…Assumption 2.1 is a typical one in DAE problems, which can realize the transformation of the DAE problem to a differential equation. In the stability analysis of power systems, except for the singularity bifurcation study, this assumption is a common one and the system satisfies it for the most cases [1,8]. Under above assumption, from G(x(t), y(t),z) = 0 and the implicit function theorem, it exists an unique C 1 mapping q for each t ∈ [0, T ]…”

A decision support tool for transient stability preventive control

“…Transient stability is an important aspect of power system stability since it describes the ability of a power system to withstand large disturbances and keep synchronism [11].…”