Efficient Flexible Load Microgrid System, EFLM

ABSTRACT Due to the inherent nature of high fluctuation and randomness, it is hard for renewable energy sources to meet full‐time power quality requirements, and are thus difficult to be directly consumed by loads. In this study we propose efficient flexible load microgrid system (EFLM), which breaks through point of common coupling (PCC) connection widely adapted by traditional microgrid; with slice‐based multi‐source energy distribution methodology, EFLM distribute power through flexible source‐load connection, to loads with classified types of consumption, achieving the goal of directly allocating otherwise wasted renewable energy, to suitable loads through principles of loads classification, dynamic source‐load coupling, time‐based power slicing, flow‐free power control, and transparent aggregation of multi‐source energy. From maximising renewable energy utilisation during its entire output period, EFLM enhances direct energy utilisation, meanwhile reduces impact due to local fluctuation to the main grid. This research also provides a new pathway to microgrids accommodating high proportion of renewable energy, grid‐forming and off‐grid microgrid configurations, high‐capacity energy storage charge‐discharge management, and medium‐to‐low‐voltage flexible grid construction.