Design and Simulation of Hybrid DG System Fed Single-Phase Dynamic Voltage Restorer for Smart Grid Application
Mohit Bajaj
Abstract
The modern commercial and domestic devices are highly sensitive to the variation in system voltage profile. In proposed work, hybrid DG system fed single-phase dynamic voltage restorer (DVR) is proposed for the purpose of mitigation of voltage sags, swells, and interruptions in single-phase distribution system. In the proposed model, switching control strategy of the DG system enables to solve voltage quality problems with minimum requirement of grid energy. The proposed model, during short or long interruption, is capable of meeting load demand and acts as an uninterrupted power source. Also, proportional integral controlled novel boost inverter results in reduced switching losses in comparison to conventional topology, and thus ensuing in saving of significant amount of energy. For the effectiveness of the proposed model of DVR, the simulation results show that it has recovered the voltage sag up to 0.1 pu and swells up to 1.9 pu of pre-sag voltage.