A robust decentralized controller design for inverter-based Microgrids with dynamic loads

We present a model of an inverter-based Microgrid with dynamic loads. The influence of the dynamic loads on the system stability in terms of frequency and voltage is deduced from their frequency domain responses. Then, based on the linear matrix inequality (LMI) technique and the small-gain theorem, a robust decentralized control approach is introduced to guarantee stability of the whole Microgrid in the presence of load influences during operation and zero steady-state frequency deviation. The control approach contributes the peer-to-peer and plug-and-play architecture of Microgrids as well as promotes the possibility of power sharing between the generation units of the system.