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The use of multi-pulse systems in the power supply of hoisting machine drives to improve voltage parameters in mining plants

Hoisting machines are among the largest loads in mining power networks. Due to frequent start-ups and stoppages, there are the source of numerous disturbances in the power network of a mining plant, such as: higher harmonics or voltage fluctuations. Currently, in most machines, the power supply and speed control system is based on static power electronic converters, which results in increased efficiency of the system and better regulation capabilities, but may increase the negative impact on the quality parameters of electricity supply in the power supply network of a mining plant. The article presents an analysis of the influence of a change in the power supply system of a hoisting machine on the electric power quality parameters of a mining plant network on the basis of measurements of power supply systems of two hoisting machines, before and after modernization.