Abstract
In this paper, a photovoltaic (PV) based dynamic voltage restorer (DVR) is proposed to handle deep voltage sags, swells and outages on a low voltage residential distribution system. The PV based DVR can recover sags up to 10%, swells up to 190% of its nominal value. Otherwise, it will operate as an Uninterruptable Power Supply (UPS) when the utility grid fails to supply. It is also designed to reduce the usage of utility grid, which is generated from nuclear and thermal power stations. PV based DVR system is comprised of PV system with low and high power DC–DC boost converter, PWM voltage source inverter, series injection transformer and semiconductor switches. Simulation results proved the capability of the proposed DVR in mitigating the voltage sag, swell and outage in a low voltage distribution system.
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