Distribution Power Loss Mitigation of Parallel-Connected Distributed Energy Resources in Low-Voltage DC Microgrids Using a Lagrange Multiplier-Based Adaptive Droop Control

This article presents a Lagrange multiplier-based adaptive droop control to mitigate distribution power loss of parallel-connected distributed energy resource (DER) systems in dc microgrids. The comprising line and converter can be modeled as quadratic function the output currents DER systems, which optimized by tertiary-layer multiplier method obtain optimal current references for secondary-layer control. are compensated provide voltage primary-layer local dual-loop control, is conventional scheme regulations grid-connected dc-dc converters. Both simulation experimental results validate that proposed strategy reduce 48 V microgrids compared only optimizing different cases.