Single-Phase Three-Wire Power Converters Based on Two-Level and Three-Level Legs

This paper presents three single-phase three-wire converters. One converter is composed of three three-level-based legs, and the others are hybrid converters using three-level-based and two-level-based legs. The converters can supply two loads, 180 degrees lagged from each other, with sinusoidal waveform and constant amplitude and frequency, even with nonlinear or unbalanced loads. Furthermore, the pulsewidth modulation (PWM) technique is discussed and implemented. Simulation and experimental results are provided to illustrate and compare the operation of the proposed systems.