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Today, semiconductor elements are becoming more popular in power supply networks. Their presence in any objects of electrical equipment provides high performance with high operating efficiency. However, modern research shows the semiconductor element base negatively affects quality of electricity when they are used in parallel. In lowand medium-voltage networks, this is fraught with the appearance of frequency «noise», which negatively affects parameters equipment with presence of latter, as well their control system. To detect them, a special approach is necessary, since such harmonics can appear both from directly semiconductor elements and from operating mode of equipment where element base is applied. The purpose of this article identifies higher harmonic distortions generated by objects containing semiconductor elements.

The article reflects influence of high-power electricity consumers on control elements of frequency control of electric drive. Solution of problem of eliminating influence of voltage dips on electromechanical systems by means of a modern method of reactive power compensation is presented. Graphs of power, current, voltage versus time are presented, graphs of voltage curve are analyzed in detail with proposal of method of its normalization.

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