Ensuring Quality of Electricity in Gold Mines and Mills

Abstract

Current issues of ensuring the quality of electricity at gold mines and gold-extracting factories are considered. The method of experimental research in production conditions is considered. The results of the energy survey and analysis of the quality of electric energy in the power supply systems of gold mines and processing plants are presented. During the survey, it was found that the norm was exceeded by the total coefficient of harmonic components of the voltage on the RU-6 kV tires and the outgoing branches-for 3, 4, 5, 7 and 10 harmonics. The conclusion was made that it was not sufficient to install only condensing batteries. To increase the power factor and combat higher harmonic components on the low side of the voltage, it is necessary to use power quality regulators. The decision to use a particular type of power quality regulator is made on the basis of a set of studies and calculations of power quality indicators in the power supply systems of gold mines and gold-extracting factories. This requires the creation of a visual and easy-to-use mathematical model of the system under study, adapted to solve the problem and reproducing the actual technological processes of production. A generalized scheme of power supply is proposed, which is the basis of the developed models. The choice of a mathematical model is determined both by the type of electric drive used with semiconductor converters and by the proposed power quality controller. Based on the results of mathematical modeling and experimental studies, the estimation of losses from higher harmonic components of current and voltage is performed.