Power System Oscillations
Chapter 9: Robust Control
Abstract
Control systems are often thought of in terms of a driving signal and an output response, as a regulator in which a quantity must be kept as constant as possible despite disturbances applied to the system, or as a servomechanism. There are many regulators in power systems, for example, the automatic voltage regulator and the governor; they are necessary to ensure that the quality of the power supply is maintained. In this chapter, we will put the requirements for robust control in the context of power system small-signal stability. Of necessity, the treatment will be brief. We recommend Feedback Control Theory by Doyle, Francis and Tannenbaum, and Multivariable Feedback Control by Skogestad and Postlethwaite for those interested in learning more about this topic.
