Control of Distributed Generation System with Grid Synchronization Capability Feeding Uninterrupted Power to Local Loads

This paper’s primary goal is to continuously supply power to local loads while employing a coordinated control technique for voltage source converters in standalone and grid-interfaced operation modes when microgrid is susceptible to dynamics. The energy from the solar and wind renewable energy sources is extracted using DC-DC converters and powering local loads, that are connected to a common AC bus via parallel voltage source converters. To feed the sinusoidal grid current in case of grid interfaced mode of operation with unity power factor, the fundamental component of load current is generated using generalized soft root sign adaptive filtering approach to deal with high steady-state misalignment due to significant weight update. The converter integrated into the wind energy conversion system (WECS) functions as a grid-forming converter, and the battery energy storage is tied to the DC link to work as a power regulation entity amid interruptions in the event of standalone operational mode. The capability of both the converters operating parallel and overall microgrid response using robust control approach are corroborated in MATLAB Simulink platform and obtained results are proving the efficacy is presented in this work.