Implementation and Performance Evaluation of Three Phase Solar PV-UPQC for Power Quality Enhancement

This paper deals with the modeling, simulation and performance analysis of the three-phase solar PV (photovoltaic) integrated UPQC (PV-UPQC). This proposed system combines both the functionality of distributed generation and active power filtering. The PV-UPQC is the combination of shunt compensator and series compensator with solar PV array integrated to the DC-link of UPQC. The shunt compensator of the PV-UPQC counteracts for the load current harmonics and provides active power injection. The shunt compensator is also deriving the maximum power from PV array by controlling it at its maximum power point (MPP). The series compensator counteracts for the power quality problems related to grid such as grid voltage sags/swells, voltage disturbances by injecting voltage opposite in phase with the grid voltage. The dynamic performance of the proposed PV-UPQC system is simulated at conditions of varying irradiation and grid voltage disturbances using Matlab-Simulink under a nonlinear load consisting of a bridge rectifier with load.