Simulation and Analysis of 24-Hour Operation in a 50 kW, 380 V Monopolar LVDC Microgrid with Fault Impacts

International Journal of Electrical and Electronics Engineering

© 2025 by SSRG - IJEEE Journal

Volume 12 Issue 11

Year of Publication : 2025

Authors : Ashish Shah, Kalpesh Chudasama

10.14445/23488379/IJEEE-V12I11P116

How to Cite?

Ashish Shah, Kalpesh Chudasama, "Simulation and Analysis of 24-Hour Operation in a 50 kW, 380 V Monopolar LVDC Microgrid with Fault Impacts," SSRG International Journal of Electrical and Electronics Engineering, vol. 12,  no. 11, pp. 200-206, 2025. Crossref, https://doi.org/10.14445/23488379/IJEEE-V12I11P116

Abstract:

Monopolar Low-Voltage DC (LVDC) microgrids provide an efficient framework for integrating renewable generation but remain sensitive to power imbalance and ground-referenced fault conditions. This study gives a MATLAB simulation of a 50 kW, 380 V Monopolar LVDC microgrid evaluated over a 24-hour cycle. The model includes photovoltaic generation, battery energy storage, grid exchange, and variable loads using a 1-minute resolution for steady-state operation, while major LVDC fault types—high-impedance, pole-to-ground, arc, open-circuit, converter, and line-to-line faults—are analyzed at 20 kHz for transient behavior. Solar irradiance and load profiles are generated using smooth sinusoidal functions to represent typical diurnal patterns, and the 100-kWh battery operates within 20–80% SOC at 95% efficiency. The fault study includes variations in resistance, temperature, and injected noise to reflect real-world conditions. This shared model has the energy-balance error below 0.001 kWh and clearly displays daily power trends, battery behaviour, grid exchange, and the transient response of each fault type.

Keywords:

DC microgrids, Fault analysis, MATLAB simulation, Power balancing, Renewable integration.

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