ANFIS Based DC-Microgrid Voltage Stabilization Considering EV's and Transient Storages

A hybrid DC microgrid with a stochastic power resource such as a PV, Photovoltaic; EV, electrical vehicle; and an ultracapacitor has been studied in this paper to stabilize the voltage of DD MG. The PV is considered as the main power resource while battery and ultracapacitor are considered as supplementary power sources for long-term and short-term power insufficiency. Fuzzy logic, namely ANFIS, controller is proposed to control bus voltage, and decreasing the stress upon the battery of EV, and transfer energy between ancillary sources in an appropriate timely manner. Besides, particle swarm optimization is applied to tune the fuzzy inference systems to fully handle the abovementioned goals in an optimal manner. The proposed methodology is compared with the conventional controller approach, and the effectiveness of the proposed method is investigated by a simulation for different types of energy inequality conditions. Moreover, ultra-capacitor, namely transient storage, is considered to protect the battery of EV from charging multiple times.