Improving Power Quality in Distribution System Using ZSI-DVR

Power quality problems are the power system's primary concerns. Examples of these phenomena include voltage swells, sags, flickers, voltage notches, harmonic distortions, transients, and brief pauses. The majority of these problems mostly affect industrial clients. The best way to reduce these problems is to use custom power system components, such as UPQC, DVR, D-STATCOM, and others. DVR is a superior option to the others because of its better, more dependable, and more efficient operation. VSI (Voltage Source Inverter) is the main component of DVR and it receives power via a DC link capacitor or battery. The obtainable output voltage of a voltage-sensing instrument (VSI) is limited by the DC source voltage. On the input side of the VSI, a separate DC-DC boost converter is required for a PV-supplied system. The boost converter DC-DC requires additional switches. This results in high switching losses and overall system volume, as well as increased system costs. Additionally, when both of the same leg's switches are turned on, the inverter is damaged and loses dependability, resulting in shoot-through (ST). The primary goal of this work is to enhance DVR performance by substituting a ZSI for a VSI and using Unit Vector Template-Pulse Width Modulation (UVT-PWM) as the DVR controller. This study examines the ZSI-DVR's harmonic mitigation performance in addition to its voltage compensation performance under voltage swell and sag scenarios. The performance of ZSI-DVR and conventional VSI-DVR will also be compared in this paper. As an enhancement we are replacing the power MOSFET given by the reference author using power IGBT.