Self-tuning Voltage Regulators

Abstract

The aim of this chapter is to illustrate the design of self-tuning voltage regulators for the discrete-time linear model, presented in Chapter 2, which describes the electrical power system dynamics from the regulation node. The mission of the self-tuning regulator is to guarantee regulation of the nodal voltage amplitude in the presence of an unknown variable operating point of the power system. The design is developed both with reference to indirect and direct methods. In both methods the estimator adopts a recursive least-squares (RLS) algorithm with variable forgetting factor while the design of the voltage regulator is developed according to the pole-assignment technique and to the generalized minimum variance approach. The chapter ends with a section dedicated to illustration of the properties of the RLS algorithm.