Power Quality Improvement in a Single-Phase Energy Management System Operating in Islanding Mode

A power electronics-based energy management system (EMS) controls sources, energy storage and loads to form a microgrid. It includes an inverter to interface the DC bus with AC loads (or AC sources in the case of a grid connected system) and DC/DC converters to interface sources and energy storage to the DC bus. This paper presents the power quality analysis for an EMS operating in islanding mode, with batteries as back-up power for critical loads. Possible applications for this architecture are remote military camps and shipboard power. A novel control scheme with repetitive control and active damping is shown to meet the requirements demanded by MIL-STD-1399 for distribution of shipboard AC electric power