Autotuning technique for droop controllers to mitigate voltage and frequency deviations caused by load changes

摘要

The aim of this paper is to explain a novel technique to improve voltage and frequency profiles on microgrids controlled using the droop control scheme. The method consists on retuning the controller according to the present load scenario by adjusting the droop coefficients in a way that is proportional to the load changes. The proposed technique is tested through numerical simulations and the results show a significant improvement on the quality of voltage and frequency profiles, as well as in other important operating parameters of a microgrid. The proposed scheme can lead to a widening on the scope of droop based controllers within microgrids and renewable energy systems.