ANN control approach for DC-link stabilization and power flow coordination in a standalone hybrid microgrid formed by a 10 kWp photovoltaic array, a 20 kW wind turbine generator, and a 60 kWh battery storage system operating on a 600 V bus. A controllable dump-load branch is integrated into the design to dissipate surplus energy when the battery reaches its upper state-of-charge limit. The ANN dynamically generates converter duty ratios based on its inputs of DC-link error, its rate of change, and real-time renewable power. Simulation studies conducted in MATLAB demonstrate that the proposed controller maintains DC-link variations within ±2 %, reduces voltage ripple to approximately 3.2 V, and limits current distortion to 2.64 %, while a PI controller exhibits slower recovery, higher overshoot, and post-filter harmonics of about 3.82 %. The results confirm that ANN-based dump-load coordination ensures stable operation, prevents converter stress due to power surplus, and improves the overall utilization of renewable energy in standalone microgrid environments.
Myla et al. (Wed,) studied this question.