The aim of this article is to develop a real-time computational method that determines switching angles of selective harmonic elimination (SHE) for operating nine-level (9 L) current-fed multilevel converter (MLC). The computation algorithm for SHE conventionally requires huge calculation time to identify switching angles of the inverter, and hence, a truth table based modulation is applied for operating the converter in real time. To overcome this, a new analytical method has been proposed in this article that minimizes the computation time to calculate the switching angles. However, these switching angles cannot be directly applied to current-fed MLCs. Unlike voltage fed converters, the current-fed converters have additional operational constraints on the modulation technique.
G. S. Kulothungan, A. K. Rathore, J. Rodriguez and D. Srinivasan, “Fundamental Device Switching Frequency Control of Current-Fed Nine-Level Inverter for Solar Application,” in IEEE Transactions on Industry Applications, vol. 56, no. 2, pp. 1839-1849, March-April 2020, doi: 10.1109/TIA.2019.2957714.