Mitigation of Voltage Sags using Ultra capacitor based Dynamic Voltage Restorer Using PI Control Scheme
Author(s):
Swati Rambhad, S.R. Deore
Keywords:
Ultra-Capacitor (UCAP), DC-DC Converter, Sag/Swell, PI Controller, energy storage integration, phase locked loop (PLL).
Abstract
The most severe power quality problems in electrical systems are called as voltage sag and swell. These power quality problems must be compensated accurately. There are two voltage injection strategies to inject controlled voltage via dynamic voltage restorer (DVR) in electrical systems Power Quality (PQ) is that the most vital views at transmission and distribution levels. The availability of high-grade electrical services needed to the purchasers illustrates this idea. The voltage sag and swell square measure the foremost frequent PQ issues that mainly occur within the distribution systems since it's going to cause equipment tripping, failure of drive systems, closure for domestic and industrial instrumentality. The Dynamic Voltage Restorer (DVR) connected nonparallel has splendid dynamic capabilities and is a versatile answer for PQ issues. Ultra-capacitors (UCAP) have ideal characteristics like high power and low energy density essential for the mitigation of voltage sag and swell. This paper presents AN increased DVR topology capable of delivering deep, extended mitigation for power quality issues. Within the planned DVR, UCAP is employed as energy storage because it provides excessive power in an exceedingly short interval of your time. The DVR is integrated into Ultra capacitor via bifacial DC-DC converter which supports in presenting a rigid dc-link voltage, and conjointly helps in compensating temporary voltage sag and voltage swell. PI Controller is employed in DVR for power quality improvement. The simulation model for the proposed system has been developed in MATLAB and therefore the performance over standard DVR is valid with the results obtained.
Article Details
Unique Paper ID: 146595

Publication Volume & Issue: Volume 5, Issue 1

Page(s): 170 - 174
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