Methods of reliability assessment and construction of electrical supply systems of coal mine (High voltage schemes)

Abstract

Implementation of complex mechanization and automation of mining operations can not be effective without the availability of reliable and economically feasible schemes of power supply of mine electrical receptors. To date, the reliability of circuits has been evaluated based on general considerations and the experience of the designer. Such a subjective decision has often led either to unnecessary redundancy and complication of the scheme, or to a decrease in the reliability of power supply. Generalization of operating experience for the past years with the application of probability theory and mathematical statistics has now allowed to develop scientifically justified methods of reliability assessment and construction of power supply systems of coal mines. The methods proposed by the author are based on the calculation of: 1) the probability of interruption of power supply to mine electrical receptors; 2) the mathematical expectation of losses; 3) the probabilities of accidents due to interruption of power supply to electrical receptors of the first category.