Adaptive Nonlinearities Compensation Technique

Abstract

In the design techniques illustrated in Chapters 4 and 5, the power system has been represented by a discrete-time linear model. This chapter illustrates the procedure to design a nodal voltage control scheme employing a technique that adaptively compensates for the nonlinearities of the power system model in the frequency domain. The procedure is structured into three main tasks [49]. In the first, two Kalman filters are adopted to identify and track the values of the voltage and current phasors at fundamental and harmonic frequencies at the regulation node. These values are then used in the second task for the on-line estimation of the parameters of the equivalent model representing the electrical power system at each phasor frequency. Finally, in the third task, the voltage regulator is designed using pole-assignment technique with an adaptive compensation mechanism. The last section of the chapter presents an optimum design which minimizes the harmonic distortion level.