Synthetic Reliability Evaluation Framework of Three-Port Hybrid AC/DC/DS Microgrids

Three-port hybrid AC/DC/DS microgrids (MGs) emerge as a promising solution to mitigate the variability and intermittency of renewable energy sources (RESs). Distributed storages (DSs) can effectively buffer energy and respond to power shortages. Nevertheless, the extensive deployment of power electronic devices has sparked concerns of reliable operations of MGs. Current reliability analysis approaches only concentrate on individual levels (component, subsystem, or system), which fail to provide systematic insights into the entire reliability characterization. To address this difficulty, a synthetic reliability evaluation framework for three-port hybrid AC/DC/DS MGs, is presented in this paper. The framework enables to incorporate reliability factors across all levels, providing a more precise perspective on holistic system reliability of hybrid MGs. A guideline for reliability enhancement by using adding redundancies to vulnerable parts is presented, ensuring the satisfactory system reliability performances. The proposed analysis framework also facilitates the efficient compilation of appliance maintaining plan for various three-port hybrid AC/DC/DS MGs.