A Multi-Functional, 3P4W Utility Integrated Single- Stage Distributed Generating System With DROGI Based Control Approach

This article shows a Three-Phase, Four-Wire (3P4W) AC mains supportive single-stage, Solar Photovoltaic-Battery Energy Storage-Voltage Source Converter (SPV-BES-VSC) based Distributed Energy Generation System (DEG) to accomplish multiple functions, is presented using Double Reduced Order Generalised Integrator (DROGI). DROGI based Current Control performs multi-tasking such as, power factor correction and eliminates zero sequence harmonic from the neutral wire. One of the ROGI functions is to produce the 50 Hz peak component from the distorted, balanced/unbalanced load current. The purpose of another ROGI is to generate a sinusoidal unit template for reference AC mains current, even if sag/swell occurs at the Point of Common Coupling (PCC). BES system is protected from overcharge/deep discharge by using a Energy Management System (EMS). The complete control algorithm is realised in MATLAB in Discrete Time Frame (DTF) using simulink and Sim Power System (SPS) toolboxes for different operating conditions. The Total Harmonic Distortion (THD) of AC mains current is noticed within 5% according to IEEE-519 and 929, respectively.