Enhancing the Performance of Dual Input Split Source Inverters Using an Advanced Modulation Strategy

The increasing demand for compact, efficient, and reliable power conversion structures, especially for photovoltaics, has promoted the development of sophisticated single-stage inverter topologies such as split source inverter (SSI). In this study, improving the performance of dual input split source inverters (DSSI) is targeted at utilizing a sophisticated modulation scheme. The DSSI integrates dual input sources with a split-source inverter structure, providing continuous DC input current, reduced voltage stress, and stable DC-link voltage, which are essential requirements in such applications. The proposed control strategy uses sinusoidal pulse width modulation (SPWM) and optimized simple boost SPWM (SB-SPWM) to control the output voltage and improve the system efficiency; by implementing these modulation techniques, the system offers better control of voltage gain and, in turn, exhibits better overall control of the inverter. The proposed SB-SPWM method is validated through a set of experiments with the conventional SPWM scheme. It demonstrates the improved efficiency and reliability of the proposed approach in meeting the stringent requirements of modern power applications.