Power Loss Investigation of Series-connected Current Source Inverters with Different Modulations

Various modulation schemes such as the trapezoidal pulse-width modulation (TPWM), the selective harmonics elimination (SHE), and the space vector modulation (SVM) have been developed for series-connected current source inverters (SC-CSIs). However, the power loss of the SC-CSIs with different modulation schemes has not been studied yet. In this paper, the power loss of SC-CSIs using different modulations is investigated. The optimal modulation index resulting in the best power loss performance is selected. The results have been verified by MATLAB simulations.