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Power Quality Enhancement using Dynamic Voltage Restorer


E. Jyothirmai , G. Pullaiah College of Engineering and Technology, Kurnool; Pujari Anusha, G. Pullaiah College of Engineering and Technology, Kurnool


Dynamic Voltage Restorer (DVR), Voltage Sags, Voltage Swells, Sensitive Load, VSI, Synchronous Reference Frame Theory


Voltage sags and swells in the medium and low voltage distribution grid are considered to be the most frequent type of power quality problems based on recent power quality studies. Their impact on sensitive loads is severe. The impact ranges from load disruptions to substantial economic losses up to millions of dollars. Different solutions have been developed to protect sensitive loads against such disturbances but a series compensator is considered to be the most efficient and effective solution. Even the conventional concept suffers with effective controller problems. To tackle these situations, custom power apparatuses are utilized. Dynamic Voltage Restorer (DVR) is a modified power apparatus that is utilized to enhance voltage stability i.e. to minimize the power quality problems in electrical power system network. The important parts of the DVR comprise of voltage source inverter (VSI), booster transformers, filter and a dc energy source. The principle of the DVR is utilized to inject the voltage in series and in synchronism with the standard voltages with a goal to compensate voltage influences. There are various control techniques used for the operation of dynamic voltage restorer. This paper presents the hysteresis voltage control technique for generation of switching pulses for inverter of dynamic voltage restorer.

Other Details

Paper ID: IJSRDV8I20923
Published in: Volume : 8, Issue : 2
Publication Date: 01/05/2020
Page(s): 1101-1105

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