SIFLC based control implementation of DSTATCOM

In this paper, five level distributed static compensator (DSTATCOM) is demonstrated to reduce harmonics efficiently. The topology of the DSTATCOM consists of the cascaded H-hridge multilevel inverter (CHBMLI), de link and interfacing inductor. The dc link voltage regulated with single input fuzzy logic controller. The concept of the SIFLC is derived from conventional FLC with signed distance. This simplification allows SIFLC control surface to approximated piece wise linear surface (PWL). The derived PWL surface is used for individual de capacitor voltage regulation. The instantaneous reactive power theory is used for reference current generation. The SIFLC for CHBMLI based DSTATCOM individual dc voltage regulation is proposed. The CHBMLI based DSTATCOM with SIFLC efficiently compensates the reactive current of the nonlinear load. The performance characteristics of the CHBMLI based DSTATCOM using SIFLC is compared with conventional fuzzy logic controller. The simulated response of DSTATCOM with the SIFLC shows effective compensation performance for a dynamic change in the load than the Conventional fuzzy logic controller.