ANALYSIS OF ELECTRIC POWER LOSS IN THE POWER SUPPLY SYSTEM OF THE CONCENTRATING FACTORY

Abstract

The relevance of the work is caused by the need for a comprehensive study of the power supply system of the processing plants. For this, it is necessary to develop an effective methodology for calculating electricity losses for individual technological mechanisms and the factory as a whole, which will make it possible to significantly reduce the energy component of costs during the production process. The main aim of the research is to develop a methodology for determining energy losses by individual technological mechanisms in various operating modes, which can be used at similar enterprises. Objects: mining and concentrating factories, which are characterized by the complexity of determining the energy characteristics of technological equipment. Methods: a combination of deterministic and probabilistic-statistical methods for determining energy losses. Deterministic methods include calculating maximum losses, average loads, graphical integration, and rms current. The probabilistic statistic ones, in their turn, are based on the study of statistical characteristics and the use of statistical samples of network schemes Results. Based on the experimental studies, a methodology has been developed for determining the energy losses in the elements of the power supply system of the concentrating factory in nominal and operational mode. It was established that the ratio of loss factors in the nominal and operational modes of operation, which determines the degree of utilization of the capacity of the cable network of 6 kV, is in the range of 1,02–2,57. On average, a 6 kV cable network is underloaded by 25–30 %. Actual electricity losses in the 6 kV cable network turned out to be less than the nominal ones and make up less than 1 % of the total electricity consumed, therefore, any measures to reduce electricity losses are impractical. The weighted average power factor for the concentration plant is 0,82, so it may be appropriate to carry out measures to compensate the reactive power. The calculation of the parameters of the compensating devices and the choice of their installation site are provided for by the work plan for the future period.

Keywords

• processing plant
• electricity losses
• cable network
• power supply system
• graphic integration method
• equipment capacity