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本文概述了露天矿间断-连续工艺供电系统的工艺特点和对供电系统的特殊要求。应用实例分析比较了在不同的间断-连续工艺方式下采用一个大容量降压变电所集中向间断-连续工艺综合机组供电的方案和采用数个容量较小的降压变电所分别向具有不同工艺特征的分机组供电的方案，结果表明后者优于前者，其可比费用最小，工作可靠性高。文中最后给出了供电系统负荷中心的计算方法和公式．
This article outlines the technical characteristics of power supply system for discontinuous discontinuous-continuous process in open-pit mines and the special requirements of power supply system. The application examples were compared and analyzed in different discontinuous - continuous process mode using a large-capacity step-down substation to intermittent - continuous process integrated unit power supply scheme and the use of several smaller capacity step-down transformer substation to have Different technological characteristics of the sub-unit power scheme, the results show that the latter is superior to the former, the minimum cost comparable, high reliability. Finally, the paper gives the calculation method and formula of the load center of power supply system.