Implementation of Global Control and Energy Management in a Hybrid AC-DC Microgrid for Residential Areas

This paper presents a general study of the instruments and control strategies involved in the design of a hybrid microgrid (HMG), where multi-source power production unites are spread within its local confines. The primary goal of this endeavor is to observe, analyze and document the feasibility and performance of hybrid topologies, where a region of stability is adopted for the analysis of system's response to a step load. The characteristics of the employed devices, namely; current source converters (CSC) on the DC side and paralleled voltage source inverters (VSI) are viewed from a power generation standpoint. For the DC part of the HMG, coordinated power sharing is achieved by super imposing the currents of the sources to possible values that correspond to a desired point on each source's power production chart. On the AC side, a droop controller is implemented to coordinate the energy production of the different source supplying the AC bus.