Decentralized Voltage Control of Autonomous DC Microgrids With Robust Performance Approach

In this article, we propose an optimal decentralized robust $H_\infty $ control system for the voltage problem of autonomous uncertain dc microgrids consisting multiple distributed generations (DGs) with general topology. The one-degree-of-freedom (DoF) structure developed guarantees performance as well its stability against various sources uncertainty, such plug-and-play (PnP) operation DGs, topology changes, large load perturbations, different subsequent and presence constant power loads (CPLs). To that end, microgrid is modeled a Linear Time-Invariant (LTI) polytopic state-space system. Then, state-feedback technique based on linear matrix inequality (LMI) linearly parameter-dependent (LPD) Lyapunov matrices implemented microgrids. proposed controller does not require any sort communications, property eliminates need prefilter design. efficiency analyzed by simulating case studies through SimPowerSystems Toolbox in MATLAB. Finally, method validated via experimental studies.