This article mainly introduces the structures and functions of the reactive power compensation system on P&H 4100XPC shovels used in Pingshuo Coal Mine, and illustrates the RPC system's reactive power detection, multi-level and rolling steps compensation, which will possibly offer some ideas for the electrical system design of relevant equipment and the equipments maintenance work.%就平朔露天矿主要使用的P&H 4100XPC电铲设备的直流无功补偿系统的结构和功能进行介绍，对无功功率的检测和多级别补偿和滚动补偿机制进行阐述，为相关设备的电气系统设计开发提供思路，也为现场维修保养工作提供借鉴。
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