Performance of an Adaptive Voltage Regulator Adopting Different Identification Algorithms

Abstract

The performance of a previously-proposed self-tuning control scheme for the regulation of nodal voltage in power systems is analyzed. To estimate the parameter variations of the equivalent model representing the power system, three different parameter tracking techniques are adopted and compared. A description of the estimation algorithms and a complete discussion of the implementation issues are reported. Particular attention is paid to assure a good parameter tracking performance as well as to avoid the estimator wind-up. Numerical applications referring to a simulated case study are presented to compare the different performance achievable by the self-tuning regulator in response to both a step reference variation and sudden power system parameter variations.