Virtual Synchronous Generator-Based Interlinking Converter for Enhanced Power Sharing and Quality in Islanded Hybrid AC/DC Microgrids

This paper presents a novel power management scheme for hybrid AC/DC microgrids (HMGs), focusing on improving power sharing, voltage control and system stability using Virtual Synchronous Generator (VSG)-based interlinking converters (ILCs). The proposed approach integrates a multi-layered control framework that employs adaptive droop control to coordinate the AC and DC subsystems in real time, responding to load variations and bidirectional power flow. The system is equipped with two ILCs: the first (ILC۱) facilitates interlinking and energy exchange between the AC and DC sub-grids, while the second (ILC۲), integrated with a bidirectional DC/DC converter, manages the DC-link voltage and enables efficient power transfer. A Battery Energy Storage System (BESS) is placed between ILC۲ and the DC-link to stabilize power fluctuations. The VSG method, leveraging virtual inertia, is employed to counteract the negative impacts of fluctuating renewable energy sources, such as wind power and photovoltaic (PV), thereby enhancing the system's dynamic behavior and stability. This strategy mimics synchronous generator inertia, ensuring reliable frequency and voltage regulation. Simulation studies in MATLAB/Simulink validate the effectiveness of the proposed scheme, demonstrating significant improvements in power sharing efficiency and power quality.

کلیدواژه ها:

Hybrid AC/DC microgrid ، ILC ، power sharing ، Power quality ، virtual synchronous generator