Power Quality Enhancement with Grid Integrated Solar Photovoltaic fed BESS using Unified Power Quality Conditioner

Integrating renewable energy sources like solar are widely used to scale back energy dependency on conventional power generation method, which in turn causes voltage disturbances resulting in massive economic losses. To avoid these power quality issues unified power quality conditioner (UPQC) can be implemented. The UPQC model is made up of back-to-back series and shunt active power filters (APF) that can manage the load voltage and grid current at the same time using control strategies such as synchronous reference frame (SRF) and instantaneous reactive power theory. The performance of UPQC with solar PV and battery energy storage system (BESS) with respective control techniques is discussed in this research. The system accounts for voltage sag, swells, load current harmonics, and reactive power under nonlinear load.