ABSTRACT
Hybrid AC/DC microgrid (HMG) systems comprise several parallel connected distributed resources with electronically controlled strategies, which are capable of operating in both islanded and grid-connected modes. This chapter begins with an introduction to the hybrid microgrid system. Then it discusses the structure of the HMGs including their topologies, grid components, power converters such as DC–DC converters and voltage source converters (VSCs), various control strategies like centralized/distributed control, primary control (droop-control, voltage/current control loops, power sharing loops), secondary/tertiary control (voltage/frequency restoration), DC–DC converter control schemes, and interlinking converter (ILC) control. Finally, detailed analysis on fault ride through (FRT) capability, disturbance resiliency evaluation, influence of energy storage location on HMG performance, and improved dynamic performance of HMG, has been provided. Furthermore, simulation results obtained in MATLAB\Simulink environment have been presented and discussed.
