Voltage and frequency secondary cooperative control in a microgrid in island mode

Motivated by the recent and growing interest for controlling microgrids with distributed generation within, this paper describes a comprehensive proposal of a hierarchical control system for an AC microgrid with V/f and P/Q source converters when operating in island mode. While primary control will be based on conventional local droop methods, the secondary control will consist of distributed cooperative control algorithms based on multi-agents. A case study will be modelled on a {d-q} rotary reference frame, where the control hierarchy and the results will be illustrated by simulation using MATLAB-Simulink.