Reduction of SVC capacity by flicker control using parallel band-pass filters

Flicker is generally caused by electric arc furnaces. The measure equipment such as SVC etc. is generally used to suppress flicker below the restriction value in power system. If flicker control performance can be improved by new control scheme, flicker is suppressed. However, the capacity increases by compensating for all the frequency components. This paper shows proposed control scheme of a line-commutated SVC for flicker control with SVC capacity reduction. The excellent control performance is achieved by applying the control of a feed-forward (FF) and a feedback (FB) schemes at the same time. In addition, proposed control has efficient extraction method of flicker component by design of parallel band-pass filters for capacity reduction. The design gives priority to specific frequency region with high restrain effect in flicker components. The evaluation of control performance and reduction effect of SVC capacity is verified by numerical simulation.