GRID-INTERACTIVE MULTIPORT THREE-PHASE CONVERTER FOR RENEWABLE POWER AND ENERGY STORAGE MANAGEMENT

Abstract

The large-scale integration of renewable energy systems into modern distribution networks necessitates advanced power electronic interfaces that ensure power quality, flexibility, and bidirectional power flow. Multiport converter architectures enable the simultaneous handling of multiple renewable sources and energy storage units within a unified system. This paper proposes a Grid-Interactive Multiport ThreePhase Converter capable of coordinating photovoltaic (PV) generation, battery energy storage, supercapacitors, and electric vehicle (EV) charging stations while providing high-efficiency AC grid power injection and ancillary services. The converter employs an improved modulation and control strategy enabling independent control of each DC port, maximum power point tracking (MPPT) without additional converters, and bidirectional operation. Experimental analysis demonstrates stable grid synchronization, reliable DC-link voltage regulation, and peak efficiency above 96%. The system offers a compact, scalable solution suitable for smart grids, microgrids, and distributed renewable infrastructure.