基于奇对称无差分交流斩波桥臂及单极性调制策略的直接AC-AC变换器

This article proposes a single-phase bipolar pulsewidth modulation direct ac–ac converter with unipolar modulation strategy. The converter is composed of two odd symmetrical two-level no-differential ac chopper legs, which can work in noninverting and inverting modes for the utility voltage sag or swell compensation. The number switches working at high frequency in each operating mode are minimize...