A Novel Excitation Control Design for Multimachine Power Systems

This paper presents a generalized excitation control design that ensures not only a desired damping of the critical electro-mechanical modes of oscillation but also the zeroing of the terminal voltage error independent of terminal voltage excursions. The excitation system consists of a compensation transfer function utilizing the machine speed or terminal frequency and/or electrical power. A comparison of the proposed design with a conventional excitation system control indicated its effectiveness in enhancing small scale as well as large scale system stability.