Robust decentralized voltage control for uncertain DC microgrids

• Considering robust desired performance and stability for the islanded DC microgrids. Preserving robustness under several uncertainty sources, by modeling all uncertainties as a new polytope. Optimal designing local voltage controllers which results in optimal performance. Modeling interaction terms between DGs disturbance input to achieve decentralized structure. The scalability of design process proposed controller. A control scheme direct current (DC) microgrids is presented this paper. investigated microgrid consists multiple distributed generation (DG) units with general topology, each one comprising uncertain ZIP (constant impedance (Z), constant (I), power (P)) load. controller confers following main advantages: 1) procedure scalable, 2) it has completely structure, 3) prepares desirable nominal closed-loop microgrid, 4) preserves well system different sources uncertainty, including plug-and-play (PnP) functionalities DGs, topology changes, load, unmodeled load dynamics, 5) every solution unique convex optimization problem, resulting successive changes. First, linear time-invariant (LTI) state-space model developed DG subsystem capturing disturbances, are modeled single Then, objectives converted into dynamic output-feedback-based an LTI polytopic H ∞ criterion. Finally, obtained nonconvex problem reduced matrix inequality (LMI) based problem. Several simulation case studies carried out MATLAB demonstrate effectiveness