Advanced Control Architectures for Intelligent Microgrids—Part II: Power Quality, Energy Storage, and AC/DC Microgrids

TLDR

The paper reviews key challenges and solutions for power quality in microgrids, distributed energy storage, and AC/DC hybrid microgrids. It presents a sequence of control strategies: grid‑interactive power quality enhancement, cooperative voltage harmonic and unbalance mitigation, STATCOM deployment for voltage sags/swells, and coordinated control of distributed storage and AC/DC hybrids.

Abstract

This paper summarizes the main problems and solutions of power quality in microgrids, distributed-energy-storage systems, and ac/dc hybrid microgrids. First, the power quality enhancement of grid-interactive microgrids is presented. Then, the cooperative control for enhance voltage harmonics and unbalances in microgrids is reviewed. Afterward, the use of static synchronous compensator (STATCOM) in grid-connected microgrids is introduced in order to improve voltage sags/swells and unbalances. Finally, the coordinated control of distributed storage systems and ac/dc hybrid microgrids is explained.