A Reliable Protection Scheme for Hybrid Microgrid Network with Battery Energy Storage System

Growing electricity demands combined with drastic environmental changes have led to the penetration of renewable distributed generations (DGs) close to the load via the adoption of microgrids. However, the intermittent nature of solar based DGs complicates the protection of hybrid microgrid system. Integrating the microgrid system with battery energy storage system (BESS) ensures the reliability of power supply during dual operating modes. The role of BESS during the maximum and minimum demand scenarios has been discussed for grid-connected mode. Further, a reliable fault detection classification scheme using Discrete Wavelet Transform (DWT) and Linear Discriminant Analysis (LDA) approach has been proposed for hybrid microgrid network integrated with BESS. The proposed scheme has been validated for fault and no-fault cases and found effective for varying fault locations, fault inception angles, and fault resistances in both the microgrid operating modes.