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Energy Saving in the Ore Beneficiation Technological Process by the Optimization of Reactive Power Produced by the Synchronous Motors


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DOI: https://doi.org/10.15866/iree.v16i4.20119

Abstract


The article substantiates the importance and the complexity of the implementation of saving the energy consumed in the technological process of grinding ore, using a large number of different energy-intensive energy consumers. The purpose of the work is to save electricity used in the technological process of ore crushing without spending additional means, taking into account the operating modes and technological factors of the consumers used. In order to achieve this goal, synchronous motors included in the technological scheme of ore grinding have been used as a source of reactive power, taking into account the fact that asynchronous and synchronous motors are installed at the common power line for driving various technological mechanisms. This approach has significantly relieved power lines and losses on these lines. A mathematical model of the optimal distribution of reactive power generated by synchronous motors has been proposed, which provides a power factor close to one on a common power bus, as well as the minimum value of the total losses of active power of electromotors that generate reactive power. For technological schemes with different structures used in the ore grinding process, the values of the power coefficients on the power supply bus in different operating modes have been estimated. Using a genetic algorithm for optimal decision-making, the values of the optimal distribution of reactive power between synchronous motors, as well as the share of energy saving have been determined. The results obtained make it possible to provide energy savings for a technological scheme with any structure without significant financial costs.
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Keywords


Reactive Power; Optimization; Power Factor; Genetic Algorithm; Grinding Technological Process

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