An EAMCCF-Based Control Strategy to Enhance Operation of Solar PV-BES-DG Set-Based Autonomous Microgrid with Nonlinear Local Loads

The local nonlinear loads impact performance of a microgrid (MG), as they degrade the system power quality (PQ). This degradation is more in a diesel generator (DG) based standalone MG than grid-connected MG. Therefore, this article introduces an enhanced adaptive multilayer complex coefficient filter (EAMCCF) control for PQ enhancement of a MG comprising a solar photovoltaic (SPV) array, battery energy storage (BES) with a synchronous reluctance type DG (SyRG). The EAMCCF removes dominant third, fifth, seventh harmonics during unbalanced/distorted load and eliminates DC offset without compromising the dynamic response. The control runs the DG set in its fuel economic zone (FEZ). EAMCCF performance is compared with existing controls like multilayer second-order generalized integrator (MSOGI), CCF, and its modified version. MG performance with EAMCCF control is verified experimentally at its steady state and during situations like varying solar irradiance and load unbalance.