Nowadays, the quality of the electricity supply is becoming more important due to the use of sophisticated computer controlled systems. This has been recognised by the electrical utilities, which penalise user for disturbances.
The Static VAR Compensator (SVC) is designed to decrease disturbances caused by changes in reactive power and voltage fluctuations in the normal operation of transmission lines and industry distribution systems. Disturbances may be caused by line switching, line faults, non-linear components such as thyristor controls and rapidly varying active or reactive loads. A typical source for these kind of disturbances are electric arc furnaces and rolling mills. These disturbances result in harmonics that load the supply network and cause voltage fluctuations. Varying loads can also create disturbances in the form of phase unbalance and voltage flicker phenomenon as well as create a need for additional reactive power.
SVC is the best solution for the high voltage plants which have these type of distrubances. Thanks to SVC, reactive power compensation and voltage stabilization are provided and harmonic distortion and flicker level are reduced below the standards. Other advantages are energy saving and shorten production period.