Abstract: In this paper, a damped second-order generalized integral (DSOGI) controlled binary hybrid multilevel inverter (BHMLI) driven connected to the grid solar energy converting system (SECS) is presented. The source of voltage for the inverter's H-bridge's DC-link is modified by the BHMLI architect's cascaded half-bridge arrangement producing an approximation of the reference waveform. The output waveform amplitude is improved, and the H-bridge switches' dV/dt is decreased. In transient situations, the DSOGI control reduces oscillations and overshoots and prolongs the service life of low power switches. It is used for the first time in literature in the multilayer inverter application. In addition to reducing the load's demands for harmonic and reactive power, the SECS is made to inject active power into the grid. The cascading of ‘n’ half-bridges and one H-bridge yield (2(nC1) 1) output voltage levels. The operation of the DC-DC converter's incremental conductance (IC) algorithm-based maximum point tracking (MPPT) allows for the maximum power extraction from solar photovoltaic (PV) arrays. It is accomplished via an isolated SIMO-SEPIC (single-input, multiple-output, single-ended primary inductance converter). The analysis of SECS with 15-level BHMLI uses both extensive simulation and a hardware prototype. Additionally, the system's shunt active filter functioning is tested under various load scenarios, and the grid power quality is maintained during operation within the IEEE-519 standard. The experimental examination at steady-state and dynamic fluctuations of load-side and insolation variations validates the theoretical assertions. The setup constructed in the lab is evaluated for a 5 kW, 400 V, three-phase system.

Keywords: Multilevel inverter, SIMO-SEPIC, solar PV, power quality.

| DOI: 10.17148/IJIREEICE.2023.11513