Yalova A. Electric energy efficiency and methods of its improving for underground extraction of iron ore

The research object is the process of consumption of electric energy in power supply systems of iron ore mines. The aim is improving the efficiency of electrical energy in conditions of domestic iron ore mines through the development of mathematical models for monitoring, assessing and establishing the forecast level of use in conditions of opacity of the expected production volumes of this type of minerals. Research methods: the method of mathematical statistics, the method of Cadek, the scale of Chedoke, factor analysis, dispersion analysis, principal component method, the method of "compression" of information. Theoretical results: first it is proved that the volumes of consumption of electric energy iron ore by Ukrainian enterprises, with underground facilities that are not directly dependent on the volumes of extracted iron ore; upgraded well-known method of estimation of efficiency of functioning of power transformers voltage main step-down substation in function of their load factor; improved method of process control elektrotermometriya of iron ore mines based on the development of an integrated indicator, which distinguishes it from known the absence of normative values and allows the current and forecasted assessment of levels of power consumption of the enterprise during the components life cycle; has been further developed, in the context of domestic iron ore mines, a method for assessing the available positive and negative potential of improving the efficiency of enterprises, taking into account the level and modes of consumption of electric energy, the process of formalization of types and kinds of technological equipment that might be used by consumers-regulators of electric energy, allowing to create adaptive algorithms for control of iron ore of the whole enterprise. Practical results: method of analysis of the process of energy consumption and evaluation of the potential of increasing the efficiency of electrical energy iron ore by Ukrainian was proposed; the Toolkit for building a control system by amode of consumption of the mining companies was developed; the structure of the "pilot project" was substantiation and the stepwise algorithm of making it complex "Elektroprenos" to PJSC "Krivorozhskiy ore-mine combine" was created. Degree of implementation: the results are implemented in practice of PJSC "Krivorozhskiy ore-mine combine" (act from 15.04.2015); and transferred to the base of the Institute for designing of iron ore enterprises in Ukraine "Kryvbasproekt" (act from 15.09.2015); the results are used in educational process of Krivoy Rog national technical University (certificate from 28.08.2015). The field (industry use) - electrical engineering.