Abstract

Full Text

mine depths, and, as a consequence, drive motor power, lead to expansion of gearless slow-speed electric drive system application. One implementation variant of such an electric drive is a gearless electric drive based on a slow-speed synchronous electric motor receiving power from a three-level frequency converter with an active voltage rectifier. However, this system of electric drive for mine hoisting machines can cause a significant distortion of network voltage sinusoidal form. The influence of frequency-controlled electric drive with three-level active voltage rectifier on the supply network is considered. When studying the influence of the frequency-controlled electric drive (FCED) with an active voltage rectifier on the supply network in order to develop solutions to reduce the distortion of the network voltage sinusoidal form, the following variants of the active voltage rectifier influence on the supply network were considered: at the change of the network short-circuit power; at the change of the switching frequency; at the change of the reactive current setting signal; at the change of the electric drive power. On the basis of the conducted researches the following conclusions were made. When implementing a frequency-controlled with an active voltage rectifier, the power supply must be designed in such a way that its short-circuit power is greater than the value at which Ku (total harmonic coefficient of voltage components) is less than the standard value. When the short-circuit power of the power supply does not correspond to the normative value of Ku, power quality regulators should be applied. It is proposed to use a filter-compensating device at the 6 kV input of the converter transformer as a regulator of power quality. Another option is the development of a control algorithm for semiconductor devices, which makes it possible to exclude significant harmonics of the active voltage rectifier voltage in the spectrum.

Keywords

shaft lifting machine, gearless synchronous electric drive, three-level frequency converter, active voltage rectifier, higher harmonics, total coefficient of harmonic components of voltage, voltage form, matching transformer, switching frequency, short circuit power, electric drive load

Fabio B. A. Mulemba Post-graduate student, Power Engineering and Energy Efficiency in Mining Industry Department, University of Science and Technology MISIS, Moscow, Russia, This email address is being protected from spambots. You need JavaScript enabled to view it., https://orcid.org/0009-0004-8211-0437

Yuri V. Shevyrev D.Sc. (Engineering), Associate Professor, Professor of Power Engineering and Energy Efficiency in Mining Industry De-partment, University of Science and Technology MISIS, Moscow, Russia

Natalia Yu. Shevyreva Ph.D. (Engineering), Associate Professor, Department of Theoretical Electrical Engineering and Electrification in Oil and Gas Industry, National University of Oil and Gas "Gubkin University", Moscow, Russia

Ivan Kh. Kuzmin Ph.D. (Engineering), Department Deputy Director, Department of Sales and Business Development in Mining Industry, Electrotechnical Industrial Company LLC, Moscow, Russia

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Mulemba F.B.A., Shevyrev Yu.V., Shevyreva N.Yu., Kuzmin I.K. Influence of Frequency-controlled Electric Drive with Active Voltage Rectifier in Gearless Mine Lifting Machine on Network Voltage Shape. Elektrotekhnicheskie sistemy i kompleksy [Electrotechnical Systems and Complexes], 2024, no. 3(64), pp. 51-58. (In Russian). https://doi.org/10.18503/2311-8318-2024-3(64)-51-58