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In this article is used to demonstrate of sliding mode controller (SMC) for a multilevel inverter based distributed static compensator (DSTATCOM)for compensation of current harmonics related power quality issues and dc side capacitor voltage balancing of cascaded H-bridge multilevel inverter (CHBMLI). The nonlinear sliding mode controller is developed for the dc link voltage and current control of CHBMLI based DSTATCOM using feedback linearization method. The use of SMC algorithm for DSTATCOMDC link voltage regulating offers several benefits such as decrease in switching ripple in dc side voltage and the constant DC capacitor voltage during dynamic conditions. The algorithm of SMC is realized on a DSTATCOM based on cascaded H-bridge multilevel inverter feeding three phase loads. The presentation of characteristics of DSTATCOM with the proposed dc link voltage balancing strategy is establish adequate for voltage balancing and elimination of power quality problems like harmonics current. Further, performance of SMC with improved voltage balancing algorithm is compared with PI controller using improved voltage balancing scheme of the DSTATCOM. The performance characteristics are validated with real-time study and SMC with improved voltage balancing scheme exhibits improved transient and steady state response of the DSTATCOM.

In this article reduced switch count-based distributed static compensator (DSTATCOM) is presented. DSTATCOM is a reduced switch count-based multilevel inverter (MLI)-based DSTATCOM that is used to eliminate harmonics in the source current caused by a non-linear load. The reference current estimation is carried out with a sliding mode controller (SMC) based synchronous reference frame (SRF). The estimation of the harmonics real power and reactive power components is used for the subsequent calculation of desired currents of the DSTATCOM. In addition to this, DSTATCOM performance was also tested with an artificial neural fuzzy inference system-based control scheme. The training data is obtained from SMC-based SRF control schemes. The DSTATCOM is modeled with MATLAB/Simulink using Simpower system block sets. The simulation study of DSTATCOM with different control schemes is carried out to examine its harmonics elimination capabilities using MATLAB. The simulation results of the various DSTATCOM control method demonstrate the reduced harmonics current caused by the load. The ANFIS-SRF exhibits better compensation characteristics than the SMC-SRF scheme. The simulated results of DSTATCOM with an ANFIS-SRF scheme give reduced ripple content in the DC side voltage of the capacitor.