Reliability Evaluation of PV-ESS Microgrid System

Abstract

Unlike grid-connected microgrids, isolated microgrids are more susceptible to internal equipment capacity changes and external dispatching strategies, so it is necessary to analyze microgrid reliability from the perspective of capacity changes. Firstly, a time series model of equipment life process, a PV model with Beta distribution, a load model with time variability and stochasticity, and an energy storage model with operational constraints are studied. Secondly, the reliability index is used to characterize the system reliability level, and the power scheduling and load shedding strategy with minimum load shedding is proposed. Finally, the improved RBTS BUS6 F4 system is used as an example to deeply analyze the interaction mechanism of each device capacity on the reliability of the microgrid and to show the effectiveness of the proposed strategy.