Novel DSOGI-Based SRF Controller for Power Quality Enhancement in Three-Phase-Grid-Connected Dynamic Voltage Restorer Integrated With Photovoltaic System

Abstract

Abstract: This paper presents a DSOGI-based SRF control methodology that regulates load voltages using a dynamic
voltage restorer (DVR) with the integration of photovoltaic (PV) systems under severe grid voltage disturbances.
The primary objective of the proposed controller is to provide a synchronization signal from the distorted grid
voltages to the control methodology for the generation of reference signals. A DSOGI-based phase-locked loop
has been employed over the conventional phase-locked loop in the proposed controller. The photovoltaic-based
system has been attached to the dc link of the DVR for voltage regulation of DC link. Simulations under MATLAB/
Simulink platform are conducted to analyze controller performance under severe grid conditions such as voltage
sags, voltage swells, and voltage harmonics. Moreover, controller efficiency has been verified under sudden dual
voltage sags. The analysis of the PV-based DVR with the proposed controller points towards the efficiency of the
proposed controller in regulating load voltages for the normal operation of consumer loads. The total harmonic
distortions have been reduced significantly, complying with the IEEE standards for power quality.

Cite this article as: R. Mallajoshula and I. E. S. Naidu, “Novel DSOGI-based SRF controller for power quality enhancement in three-phase-grid-connected dynamic
voltage restorer integrated with photovoltaic system,” Electrica, 25, 0067, 2025. doi: 10.5152/electrica.2025.24067.