TECHNICAL AND ECONOMIC EVALUATION OF OPTIMAL VOLTAGE LEVEL FOR THE POWER SUPPLY OF DEEP MINE OPERATING HORIZONS
DOI:
https://doi.org/10.15588/1607-6761-2015-1-9Keywords:
mine, underground power supply system, capital and operating costs, voltage classAbstract
The most perspective option for possible deep mine power supply is the one with the deep input of 35 kV voltage by installing of underground 35kV/6 kV substation. This option is caused by the expected level of electrical loads, provided by mine development, the power consumers’ deep layout (considering the distance from the source to the shaft on the surface and from the shaft to the underground substation chamber) and primary and the most responsible power consumers (blind shaft lifting devices, drives of water pumping facilities) near-shaft concentration. Furthermore, this option provides further mine development and excludes the impact (and connection in an ordinary operation mode) of existing underground mine power supply system. This option is the most appropriate in terms of economic efficiency in the deep mines reconstruction (effectiveness observed at a depth of1000 m), also the 6 kV voltage class implementation inexpedience for the shown conditions is noticed. The economic operation efficiency of the main electric equipment types of6 and 10 kV voltage classes is determined, the impact indexes on their work efficiency are notedReferences
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