Transient stability prediction based on trajectory information for single machine infinite bus non-autonomous system

In this thesis, existing instability criterion and its stability indicator τ for autonomous single machine infinite-bus system (SMIB) are firstly given, which reflect convex-concave characteristics of the trajectory inΔω-δ phase-plane. On this basis, it is discussed that there are some problems when the instability criterion of autonomous SMIB system is used in non-autonomous SMIB system. Proceeding from this, through a series of derivation, besides stability indicator τ, other two necessary indicators μ which reflects convex-concave characteristics of the trajectory in ΔP-δ phase-plane and ε which reflects the impact of time-varying of parameters on system stability are obtained. At last, a instability criterion for non-autonomous SMIB system is given and verified by a simulation.