Interlink Power Converter Based on Series-Parallel Cells for Hybrid Microgrid Systems

Abstract

Hybrid microgrids are systems that enable the interconnection of AC and DC networks within a unified framework, optimizing the integration of energy storage systems and DC-based renewable energy sources with the protection schemes and AC loads, predominantly induction motors. In this context, the integration of an Interlink Power Converter that facilitates AC-DC interconnection is strategically advantageous from an operational standpoint. Furthermore, adopting a multicell-based Interlink Power Converter offers additional benefits, such as the generation of multilevel voltage waveforms, which enhances the integration of filters in AC systems. Additionally, multicell-based topologies ensure scalability and fault-tolerant operation. This paper introduces an Interlink Power Converter topology based on multicell systems, which enhances system scalability. The cells comprising the system are configured in a series-parallel arrangement, enabling effective and straightforward internal balancing, while also allowing the seamless integration of energy storage systems within the converter itself. This feature enhances the system's flexibility and controllability, providing a robust solution for hybrid microgrid applications.