Integrated control strategy for bus voltage stability and power sharing in hybrid microgrid with renewable energy integration

The deployment of power electronic converters in industrial settings, such as microgrids and virtual synchronous generators, has significantly increased. Microgrids, in particular, offer notable advantages by integrating renewable energy systems with the grid, making them highly suitable for industrial applications. Although various control strategies integrated with metaheuristic algorithms have been suggested in existing literature to enhance voltage stability, a substantial gap remains. This research aims to efficiently regulate bus voltage and power distribution within a grid-connected converter (GCC) operating in a hybrid microgrid framework using a unified control technique. The microgrid configuration comprises loads, grid-connected converters, solar modules, energy storage devices, and wind turbines. The proposed control technique is structured in two layers for effective management. In the primary layer, the grid-connected converter regulates bus voltage, while the active rectifier and boost converter control ensures optimal power extraction from the energy sources. To maintain stability, a converter connected to the battery employs a proportional-integral-derivative second derivative controller adjusted using the capuchin fruitfly optimization algorithm. In the secondary layer, the energy storage device ensures bus voltage stability by providing a continuous power supply to local loads, even under grid outage condition. For effective analysis, MATLAB-based implementation of the proposed control strategy is compared to several competing controllers. The rise and settling time for wind voltage using proposed controller is 0.2 and 1.8 s.