A Generalized Stability Analysis Method with Dynamic Phasors for LV AC Microgrids

TL;DR

This paper introduces a generalized stability analysis method for low-voltage AC microgrids that incorporates dynamic phasors for inductive lines, improving the accuracy of stability predictions.

Contribution

It extends existing phasor-based stability analysis by including dynamic phasors for inductive lines, enhancing prediction accuracy for microgrid stability.

Findings

Successfully predicts instability boundaries of LV AC microgrids.

Improves stability analysis accuracy for inductive coupling lines.

Validates the method with simulation results.

Abstract

Representation of inductive coupling lines with conventional static phasors is the main reason of inadequacy of the existing phasors based simplified stability analysis methods for microgrids with inductive coupling lines. In the literature, dynamic phasors have been proposed for the dynamic modelling of inductive lines to conserve the simplified structure of the analysis method. In this study a generalized stability analysis method for LV AC microgrids, composed of droop controlled inverters, is presented. The proposed analysis method is based on the inclusion of dynamic phasors for inductive coupling lines into the existing phasors based stability analysis method. The results show that the stability analysis method with dynamic phasors successfully predicts the instability boundaries of LV AC microgrids.