Hierarchical control of island microgrid based on consensus algorithm

Abstract When the load inside microgrid changes, droop control maintains a stable power supply cycle of by controlling voltage and frequency at parallel network distributed generation. Since traditional usually uses fixed coefficient to adjust output active reactive power, inverter will deviate from system rating varying degrees, so new layer link is needed restore target value. Moreover, most hierarchical methods adopt centralized methods, which have limitations such as high dependence on communication. This paper combines framework consistency algorithm propose sag strategy for islanded microgrids based multi-agent system. It achieves equal-to-ratio when generation responds changes while maintaining stability microgrid’s main performance indicators. with does not require centre, it increases system’s robustness reduces communication network. Finally, an AC model built MATLAB/Simulink, effectiveness proposed verified simulation.