Interior point algorithm for optimal control of distribution static compensator under distorted supply voltage conditions

Abstract

In this study, an interior point optimisation-based control algorithm is proposed for three-phase distribution static compensator under distorted AC mains. The proposed algorithm is used to determine the optimal value of load fundamental conductance and susceptance, which minimises the supply apparent power, subjected to predefined total harmonic distortion (THD) and individual harmonic distortion limit of supply current as per international guidelines. Unlike the other optimisation techniques, this technique is based on matrices calculations, which makes it effective during load dynamics. The proposed control scheme is implemented for mitigating multiple power quality issues such as load balancing, reactive power compensation and harmonics suppression in power factor correction and zero-voltage regulation modes under linear and non-linear loads.