Incorporating a black-boxed synchronous machine model into a linear analysis of a power system

摘要

It has become a common practice of the manufacturers to provide only black-boxed models of devices to their buyers. These black-boxed models are compatible with time domain simulations. In this paper, a black-boxed EMT simulation model of a synchronous generator was connected to a known multi-machine power system, and an improved Prony Analysis method was used to identify the modes of the system from time domain simulations. The machine characteristics of the black-boxed model are assumed to be available to the user while the auxiliary controllers remain unknown. Then, an optimization-based eigenstructure assignment method is used to design a fictitious auxiliary controller for the black-boxed device, and a linearized power system model is realized. Eigenvalue analysis of the realized linear system provides insightful information of the system i.e. participation factors, mode shapes.