IMPROVEMENT OF VARIOUS DISTURBANCES IN POWER SYSTEM USING DYNAMIC VOLTAGE RESTORER
Department of Electrical & Electronics Engg., Haryana college Of
Technology & Management, Kaithal[Haryana],
Department of Electrical & Electronics Engg.,
Haryana college Of Technology
& Management, Kaithal [Haryana],
Department. of Civil Engg.,
Prakash Kumar Dewangan
Department. of Electrical Engg.,
Kirodimal Institute of
A Power quality
problem is an occurrence manifested as a nonstandard voltage, current or
frequency that results in a failure or a mis-operation
of end user equipments. Utility distribution networks, sensitive industrial
loads and critical commercial operations suffer from various types of outages
and service interruptions which can cost significant financial losses. These power quality
associated problems are voltage sag, surge, flicker, voltage imbalance,
interruptions and harmonic problems. These power quality issues may cause
problems to the industries ranging from malfunctioning of equipments to
complete plant shut downs. Those power quality problems affect the
microprocessor based loads, process equipments, sensitive electric components
which are highly sensitive to voltage level fluctuations. In developing countries like
One such reliable customer power device used to address the voltage sag, swell problem is the Dynamic Voltage Restorer (DVR). It is a series connected custom power device, which is considered to be a cost effective alternative when compared with other commercially available voltage sag compensation devices.
The main function of the DVR is to monitor the load voltage waveform constantly and if any sag or surge occurs, the balance (or excess) voltage is injected to (or absorbed from) the load voltage. To achieve the above functionality a reference voltage waveform has to be created which is similar in magnitude and phase angle to that of the supply voltage.
This paper reveals a new control technique to detect and compensate for the single phase voltage sag. The simulation was checked in Matlab Simulink/Power System Block set (PSB) simulation software and has shown reliable results.
Keywords: DVR, voltage dips, swells, outage, interruption, power quality, VSC.
Sub Area: Power System [DVR]
Area: Electrical Engineering
International eJournal of Mathematics and Engineering
Volume 1, Issue 1, Pages 15-31