Optimal control for a renewable-energy-based micro-grid

This paper presents an optimal nonlinear control scheme for a renewable-energy-based micro-grid. The optimal controller synthesis is based on the state-dependent Riccati equation approach, where it is considered the minimization of a performance index (cost functional), which results in an efficient control strategy. The micro-grid is used to integrate the energy from renewable resources, with the facility to storage energy, to provide of energy to loads and to provide/consume energy to/from the utility grid. Simulation results are presented to assess the performance of the proposed controller for a case study micro-grid, which is composed of a wind energy system, a load, a storage element and the connection with the utility grid.