Enhancement of Voltage Quality in Power Syste...

Enhancement of Voltage Quality in Power System Using Series Compensation

Author Name : Gulab Rao Kumrey, Anant Shrivastava

ABSTRACT

The power quality requirement is one of the most important issues especially with the introduction of sophisticated device whose performance is very sensitive to the quality of power supply. Power quality problem is an occurrence manifested as a nonstandard voltage, current or frequency that results in failure of end user equipment. One of the major problem deal with sag andharmonics .voltage sags are one of the most important power quality problems challenging the utility industry voltage sags can be compensated for by voltage and power injection in to the distribution system The use of series compensators (SCs)  in improving voltage quality of isolated power systems is con-sidered. The roles of the compensators are to mitigate the The use of series compensators (SCs) in improving voltage quality of isolated power systems is considered. The roles of the comp-ensators are to mitigate the effects of momentary voltage sags or swells, and to control the level of harmonic distortions in the networks. A control strategy for the SC is developed to regula-te power flow. This is achieved through phase adjustment of load terminal voltage. It leads to an increase in the ride through capability of loads to the voltage sags/swells. Validity of the technique is illustrated through simulation.

Key Words- Harmonics, Power quality problem,  Voltage sag,  isolated power system, phase shift, series compensation, voltage restoration