POWER SYSTEM STEADY STATE MATHEMATICAL MODELS.

Considers flow distribution models and general steady-state equations with regard to stationary state equations of synchronous and asynchronous machines and systems for automatic regulation of generator excitation and speed. Conditions for applicability of the models are elucidated. Regions of feasibility of states corresponding to mathematical models are inter-related with and without bus-bars of constant voltage and frequency present. Use of fictitious models is confined to states belonging simultaneously to a feasible state of a real model and to an analytic stability region of the fictitious model.