Modelling of a Bi-directional Converter System for Sustainable Microgrid Integration

Abstract: This paper presents the modeling and simulation of a bi-directional converter system designed for efficient energy exchange between a solar-powered microgrid and the national grid. The system enables two-way power flow, exporting surplus energy from distributed generation to the grid and importing power during low-generation periods while maintaining voltage and frequency stability. Using MATLAB/Simulink, the converter was modelled with integrated control features including a Proportional–Integral (PI) regulator for voltage and current control, and a Phase-Locked Loop (PLL) for grid synchronization. The system performance was analyzed under varying solar irradiance and load conditions to evaluate its stability, conversion efficiency, and harmonic distortion. Simulation results demonstrated that the converter sustained a stable DC link voltage of 380 V with deviations below 2%, achieved a peak efficiency of 95.8%, and maintained a Total Harmonic Distortion (THD) of less than 3.5%. These findings confirm that bi-directional converters are essential for enhancing microgrid reliability, energy efficiency, and tariff accuracy when integrated with bi-directional metering. The proposed model provides a practical foundation for intelligent renewable energy management and supports the development of sustainable distributed power systems. Keywords: Bi-directional converter, microgrid integration, MATLAB/Simulink, renewable energy, power flow control, grid synchronization, energy efficiency, harmonic distortion. Title: Modelling of a Bi-directional Converter System for Sustainable Microgrid Integration Author: Okechukwu Cletus, Mgbachi C.A.C, Ilo F.U, Odeh.A.A International Journal of Interdisciplinary Research and Innovations ISSN 2348-1218 (print), ISSN 2348-1226 (online) Vol. 13, Issue 4, October 2025 - December 2025 Page No: 25-30 Research Publish Journals Website: www.researchpublish.com Published Date: 15-October-2025 DOI: https://doi.org/10.5281/zenodo.17357528 Paper Download Link (Source) https://www.researchpublish.com/papers/modelling-of-a-bi-directional-converter-system-for-sustainable-microgrid-integration