Novel Type-3 Second-Order Generalized Integrator Adaptive Controller for Performance Improvement in Power Quality in Battery-Supported Dynamic Voltage Restorer System

The present system of photovoltaic (PV)-battery-supported dynamic voltage restorer (DVR) has been developed for power quality improvement in the distribution system. The proposed system has the ability to mitigate voltage power quality issues like voltage sag, voltage swell, and voltage harmonics. For the proposed system, a type-3 second-order generalized integrator (SOGI) based phase-locked loop controller is utilized to improve the performance of the battery-supported DVR system. The proposed type-3 SOGI for the PV-battery-based DVR system has the ability for immediate dynamic behavior regulation with phase lead mitigation. Along with the type-3 SOGI, a modified synchronous reference frame controller is applied for the easy computation of the system controller. The proposed controller also utilizes an adaptive filter based on a double band structure to eliminate the harmonics and disturbances in the source voltages. This adaptive filter is also applied for the regulation of the direct current (DC) link voltages supported by the PV and battery. The integration of the PV and battery into the DVR system improves energy conservation and utilization of renewable energy sources. The system has been simulated under various dynamic grid conditions, and the conditions for voltage disturbances are analyzed in the MATrix (MATLAB)/Simulink platform. After analyzing the results, it has been concluded that the proposed controller is capable enough to mitigate voltage quality issues under various environmental conditions.