Abstract

The electric power industry cannot develop without analyzing the factors that affect the shape of currents and voltages when determining the parameters of the electric network mode in the context of the introduction of modern means of intellectualization into the structure of power supply systems. The share of equipment affecting the electric power quality reaches 90% in modern electrical networks. This leads to the appearance of noise in the network that reduces the quality of electrical energy, voltage distortion by higher harmonic components in particular, and affects the adequacy of the parameters of the electrical network adopted by automatic control devices. The article presents the results of digital signal processing containing distortions in the form of a harmonic component with a decrease in the sampling frequency. It is shown that a decrease in the sampling frequency does not exclude the effect of higher harmonics on the result of processing signals, including high-frequency distortions.

Highlights

  • The electric power quality is one of the main factors affecting the trouble-free operation of automatic control devices in industrial power supply systems [1]

  • Incorrect operation of automatic control devices in the electrical network can be caused by the presence of electromagnetic disturbances in the form of deviations, fluctuations, or non-sinusoidal supply voltage

  • It should be noted that electromagnetic disturbances generated by consumers' electrical receivers have a negative impact on consumer equipment and on equipment installed in the supply distribution network

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Summary

Introduction

The electric power quality is one of the main factors affecting the trouble-free operation of automatic control devices in industrial power supply systems [1]. Nowadays these devices include components built based on power electronics and microprocessor technology. Incorrect operation of automatic control devices in the electrical network can be caused by the presence of electromagnetic disturbances in the form of deviations, fluctuations, or non-sinusoidal supply voltage. The appearance of non-sinusoidal current in the network can cause additional heating and malfunctioning of the equipment It can cause additional losses in electrical equipment and conductors of power lines of network organizations, and affect the elements of the controls. The electric power quality that goes beyond the requirements of the Russian State Standard GOST 32144-2013 often has financial consequences (losses) for enterprises with electrical installations

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