Robust optimization based harmonic mitigation method in islanded microgrids

Power quality issues in islanded microgrids comprising of various renewable energy sources have recently gained more attention. As the harmonic mitigation capability from distributed resources will vary for different network topologies, this paper introduces a unified single-end approach using robust optimization model. In proposed method, central controller receives voltage distortion measurements all buses microgrid, optimizes global information, and then sends back optimal components to local each generation units, which is added reference generated by respective droop controllers locally. The robustness lies design objective function solve multi-attribute problem minimizing both average total (THD) THD critical bus microgrid considering coefficients term. It has been proved with set numerical simulations parameters that search space reduced around minima, considerably reduces time number iterations. results show suggested effective respect modified mitigate microgrids. • Robust based method reduce distortion. Modified secondary controller. Combining multi-bus microgrid. Reducing on statistical analysis. Meeting standards