Although high-voltage alternating-current (HVac) and direct-current (HVdc) are the technology of choice for long distance bulk power transmission, low-frequency HVac (LF-HVac) has been recently proposed to combine the strengths of HVac and HVdc approaches. The proposed transmission scheme operates at a low frequency thus requiring power converters to convert ac current to and from the standard HVac power frequency. The objective of this paper is to lay out fundamental requirements of power converters for LF-HVac applications. Suitability of common inverter topologies such as cycloconverters, matrix converters, and back-to-back converters are analyzed and compared. Further, initial simulations of LF-HVac involving back-to-back converters are presented.