Single-phase grounded failure is still the main reason of mine power-net fault.

单相接地故障仍是矿山电网的主要事故形式。

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With the hoist electric net in coal mine as the background, the harmonics characteristics of big DC electric power drives, especially 12-pulse serial converter is analyzed.

以矿井直流提升机供电系统为研究背景，对大功率直流电力传动装置，特别是串联12脉动整流电路进行了谐波特性分析。

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This paper introduces the structure and the operating principle and technical characteristic of the measurement and control system of power net in coal mine.

介绍了煤矿电网测控系统的结构、工作原理、技术特点。

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