Abstract
The paper describes the method of controlling water supply while maintaining reservoir pressure via changing the speed of rotation of a pumping unit synchronous electric motor drive. The paper presents a review of existing frequency converters, specifying their advantages and disadvantages. The selection of a cascade semiconductor frequency converter is substantiated. A detailed description of the computer model of an adjustable drive system based on a high-voltage synchronous electric motor drive and the selected frequency converter is also presented. The results of modeling in the form of graphs of transients allow us to conclude about the adequacy of the model and the possibility of its practical use in the study of transient modes of controlled electric pumping units based on synchronous motors.
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