BibTeX:

@article{IJIRSTV7I10011,
     title={Role of Dynamic Voltage Restorer (DVR) for Mitigating Electrical Fault Effect in Distributed Network System },
     author={Rajesh Kumar Omre, Dr Malaya S. Dash and Prof. Vasant Acharya},
     journal={International Journal for Innovative Research in Science & Technology},
     volume={7},
     number={10},
     pages={5--11},
     year={},
     url={http://www.ijirst.org/articles/IJIRSTV7I10011.pdf},
     publisher={IJIRST (International Journal for Innovative Research in Science & Technology)},
}

The most noticeable topic for electrical engineering is power quality in recent year. Power quality problem is an occurrence manifested as a nonstandard voltage, current or frequency. Utility distribution networks, sensitive industrial load and critical commercial operation suffer from various types of outages and service interruption can cost significant financial losses. One of the major problems dealt here is the voltage sag. With the fast development in power electronics technology have made it possible to mitigate power quality problems. Dynamic Voltage Restorer is a series connected power electronics based device that can quickly mitigate the voltage sag in the system and restore the load voltage to the pre-fault value. In this paper we go through to relevant power quality problems for a DVR and power electronics controllers for voltage sag and swell mitigation. Thereafter the operation and elements in DVR is described. In this thesis proposed utilizes the error signal to control the triggering of the switches of an inverter using Unit Template Vector Technique (UTVT). Modelling and simulation of proposed DVR is implemented in MATLAB SIMULINK.

Power Quality, DVR, UTVT, Unsymmetrical Fault, L-L, L-G