Three-Phase Solar PV System with Integrated Uninterruptible Power Supply and Battery Energy Storage System Performance Evaluation

Abstract

n order to address grid harmonics and power quality issues, this study investigates the potential of a Unified Power Quality
Conditioner (UPQC). In this configuration, the UPQC is backed up by a hybrid renewable energy system consisting of solar
panels and batteries. A PV system can often provide all of the active electricity required by the load. If the PV is unable to
provide the energy, particularly during the longer-term voltage disruption, the BESS will take over. Because of the greater
robustness and immunity to fluctuations and other external effects of a hybrid PV-BESS system, it is more trustworthy than a
stand-alone PV-UPQC system. So, BESS will keep producing clean energy while increasing its long-term voltage support
capabilities and optimizing the DC-link voltage control algorithm. A Self-Tuning filter (STF) in combination with the unit
vector generator (UVG) technology guides the UPQC controller's phase synchronization procedure. Even if the grid voltage is
unstable, the UPQC will function well if STF is used. By employing the STF-UVG, the UPQC controller's series and shunt
active power filter (APF) compensator may be synced without resorting to a PLL. Finally, the advantages of the new STF-
UVG method are shown by contrasting it with the standard UPQC based on the SRF-PLL method. Additional MATLAB-
Simulink examples are evaluated for reliability.Battery Energy Storage System (BESS), Self-Tuning Filter (STF), Unified
Power Quality Conditioner (UPQC), and Photovoltaics (PV)