Impact of LMVR and AMBRHC Control Techniques on Power Quality Enhancement in Distribution Systems with Non-linear Loads

The growing utilization of nonlinear loads as well as power electronic devices deteriorates the quality of power in the distribution system. Therefore, minimizing the distortions demands installing compensating devices at the point of common coupling (PCC). This paper focuses on evaluating the performance of two control techniques: the Linear Multi-Variable Regulator (LMVR) and the Adaptive Model-Based Receding Horizon Control (AMBRHC) within a Unified Power Quality Conditioner (UPQC) to enhance power quality. The control approach is designed to maintain load voltage and source current at desired reference values, even in the presence of harmonic distortions in the supply voltage and load current. Extensive simulation studies were conducted to compare the performance of these two controllers in a single-phase power distribution system, providing insights into performance limitations related to control saturation.