Fault Reconstruction of Islanded Nonlinear DC Microgrids: An LPV-Based Sliding Mode Observer Approach

This article investigates the problem of fault detection and reconstruction in direct current microgrids (dc MGs) with nonlinear loads. First, a state-space representation dc MG constant power loads (CPLs) is obtained. The faults components, actuators, sensors system are modeled by using additive terms measurement equations. A novel robust detector then proposed to estimate reconstruct faults. deploys sliding mode technique polytopic linear parameter varying (LPV) approach. approach utilizes robustness simplicity offered LPV approaches provide simple, but effective, detector. By employing Lyapunov stability theory, sufficient design conditions derived matrix inequalities (LMIs) which numerically solved convex optimization techniques. experimentally tested on practical benchmark connected CPL. Furthermore, results compared other state-of-the-art methods.