Computer analysis of small-signal stability of power systems including network dynamics

The paper describes a comprehensive approach for computer formulation of power system linearised state equations that also include those of the transmission network. Based on this formulation, an eigen analysis package for investigation of high-frequency (above 5 Hz) dynamics has been developed. The salient feature of formulation is that it allows modular addition and variation of component models, without rearrangement of the overall state space formulation. The package provides a flexible tool for systematic analyses of small-signal stability impacts of novel devices, e.g. power electronic apparatus and their controllers. The paper also presents an application of the state space formulation and the eigen analysis package for a multi-SVC system