An adaptive method of symmetrical component estimation

Abstract

This paper proposes a novel approach of estimating the symmetrical component into a network. The power grid development and deployment offer several advantages regarding the overall system performance of the electrical system. Currently, through the smart metering system, the symmetrical components problems can be resolved in real-time by extracting, tracking and detecting any issue related to power disturbance on the grid. An adaptive method to estimate symmetrical components in the framework of the power systems is presented. The proposed method is based on a nonlinear adaptive tracking of amplitude, phase and frequency of a non-stationary sinusoidal waveform in real-time. The method offers structural simplicity while maintaining performance robustness and controllable speed and accuracy. Experimental results are presented to verify the performance of the proposed method. The results show that the method can provide an accurate estimation of the symmetrical components in the presence of amplitude and angle variations, as well as in the presence of harmonics. The simplicity of the structure and ease of the parameter settings render the proposed method suitable for both software and hardware implementation. Two scenarios are analysed to validate the proposed algorithm.