The article considers the design of modern electrically driven gas-pumping unit (EGPA). The advantages of a smooth adjustment of speed and performance EGPA. Provides an analysis of options for building the power part of the high-voltage frequency converters, used in the composition of the EGPA at compressor stations of main pipelines. Refer to the element base of high-voltage frequency converters. The characteristics of each of variants. The method of work of the frequency converters. Compare the characteristics of frequency converters of various manufacturers. The basic approaches to manufacturing. Defined the most optimal scheme of the power part of  frequency converters.

Keywords: frequency converter, topology, design, optimization, structural scheme