Fuzzy consensus controller for voltage and frequency regulation, power sharing, and SoC balancing in islanded AC microgrids

Active and reactive power sharing accuracy and SoC balancing of battery energy storage systems in AC MGs are crucial objectives in MG control. To achieve this purposes, this work proposes a fuzzy-consensus controller based on a distributed communication channel. The fuzzy controller is applied individually in each DG to control the frequency, voltage and power by using only local variables. In a higher control layer, a consensus protocol is used to calculate the active and reactive power of the DGs in order to achieve accurate power sharing and SoC balancing simultaneously. Numerical results show the feasibility of the proposed strategy, which can maintain both voltage and frequency controlled and accurate power sharing under communication failures and false data inject attack on the communication channel. Comparison scenarios exhibited a lower frequency deviation and a SoC balancing up to 17.62% faster than state-of-art works in the literature.