Design of a control strategy for a three-phase DC/AC electronic converter to supply virtual inertia from a renewable energy source connected to the unbalanced electrical grid.
Marcos Gallegos Collado(1), Julio C. Tafur(1), Damian Sal y Rosas(2) 1. Department of Engineering - Control and Automation Engineering Master Degree Program. Pontificia Universidad Católica del Perú 2. LAAS-CNRS, University of Toulouse, 31031 Toulouse, France 2025-07-25

Abstract

Power electronic converters play a critical role in the integration of renewable energy sources, especially in distributed generation systems and microgrids. They must operate safely and efficiently under all operating conditions, particularly in unbalanced grids. The provision of virtual inertia using simple and efficient control algorithms represents a good alternative to improve the stability of distributed generation systems. This article proposes the design of a control strategy to provide virtual inertia from renewable energy sources connected to unbalanced power grids using the PLL (phase tracker system) as an element for estimating the phase and frequency of the voltage wave and applying appropriate tuning of the controllers to take advantage of the system dynamics.

Key words: Electronic converter, phase-locked loop (PLL), renewable energy, second harmonic filter, unbalance grid, virtual inertia.

References

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