Experimental verification of PV based Dynamic Voltage Restorer (PV-DVR) with significant energy conservation

In this paper, a novel photovoltaic fed Dynamic Voltage Restorer (PV-DVR) is proposed to mitigate deep voltage sags, voltage swells and outages on a low voltage residential distribution system during both daytime and night time. In addition to the voltage regulation, the proposed PV-DVR reduces the energy consumption from the utility grid by disconnecting the utility grid from the load through the semiconductor switches, when the PV system generates excessive or equal power to the required load demand during the day time. However, the reduction of energy consumption is always desirable for the reduction of panel tariff and global warming gasses. Further, the use of low step-up DC–DC converter with fuzzy based Perturb & Observe (P&O) Maximum Power Point Tracking (MPPT) algorithm eliminates the drawback of conventional PV based DVR by tracking maximum power point of the PV array. Simulation and experimental results are presented to validate the advantage of the proposed system.

► We modeled a PV-DVR to handle voltage sag, swell, outage. ► It operates as an UPS, when the grid fails to supply on both day and night time. ► It eliminate the drawback of conventional UPS and DVR. ► It reduces the potential panel tariff over 900 $ per year. ► It eliminates the need of individual stabilizer for a home or a small industry.