Fuel-cell power systems comprising singlephase DC/AC inverters draw low-frequency AC ripple currents at twice the output frequency from the fuel cell. Such a 100/120 Hz ripple current may create instability in the fuel cell system, lower its efficiency, and shorten the lifetime of fuel cell stack. This paper presented a waveform control method that can mitigate such a low-frequency ripple current being drawn from the fuel cell, while the AC power Distributed Power Generation System or the Electric Vehicle P...