The fractional frequency transmission system is an emerging technology for long-distance wind power integration. and the modular multilevel matrix converter (M3C) is the keen equipment. Since the M3C directly connects two ac grids with different frequencies. the external and internal harmonics have complex coupling relationships with a unique dual-fundamental-frequency spectrum. https://www.spidertattooz.com/Orly-Nail-Lacquer-Artificial-Sweetener-20758-p28641/