THE EFFECTS OF ADJUSTABLE ELECTRIC DRIVES OF MINE HOISTING EQUIPMENT ON THE ELECTRICITY QUALITY IN THE POWER SUPPLY CIRCUITS
Journal Title: Електромеханічні і енергозберігаючі системи - Year 2017, Vol 1, Issue 37
Abstract
Parameters, distinctive features of heavy-duty power converter circuits and daily graphs of active and reactive power of both hoisting equipment's electric drives in particular and power consuming units of the Kryvbas (Kryvyi Rih Iron Ore Basin) iron ore mining companies as a whole were analyzed. It was found that the use of electric drives as per the frequency converter–synchronous motor system instead of as per the generator–motor one had made it possible to reduce active power levels at no load by 2 to 4 times. As compared with the thyristor converter–motor system, the frequency converter–synchronous motor one also makes it possible to significantly reduce the levels of reactive power consumption, 6 kV voltage deviation levels at the substations' bus sections, and to improve the power factor. It was revealed that the upgrading of hoisting equipment's electric drives having various power conversion systems requires a more thorough analysis of the interaction between those drives' converters and power supply circuits, as well as the introduction of efficient measures to ensure the electromagnetic compatibility of the two. It was corroborated that the insufficient attention to the distinctive features of power supply circuits of each individual mine and an increase in the installed capacity of electric drives, all that being concurrent with deepening of mines, can lead to the deterioration of quality parameters of electricity in the power supply circuits, to negative effects on the operation of both the in-house power consuming units and those connected to the mine substations (municipal power networks, municipal electricity-powered transport, municipal water supply and sewage pumping stations). It was recommended to use the MATLAB environment mathematical modelling methods for the preliminary assessment of the impact of heavy-duty mine-specific electric drives on the power supply circuit.
Authors and Affiliations
Oleg Sinchuk, Yuliy Filipp, Mihail Maksimov, Ruslan Zaytsev
Keywords
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