煤矿高压电网小电流接地选线技术的比较与研究

文章分析了在理论研究和实践应用中都较为成熟的煤矿高压电网小电流接地选线方法的优缺点,并根据选线准确性、无误动作、对故障类型的广泛适应性及能够适用于中性点不接地或经消弧线圈接地的方式等要求,提出了一种结合稳态和暂态选线方法、优势互补的综合选线法,并给出了该方法的原理框图。

Comparison and Research of Line Selection Technology for Small Current Grounding of Coal Mine High-voltage Power Grid

The paper analyzed advantages and disadvantages of line selection methods for small current grounding of coal mine high-voltage power grid that are relatively mature in both theoretical research and application.Based on accuracy of line selection,no malfunction,a wide range of adaptability to different fault types and adaptability to neutral isolated or petersen-coil grounding modes,it proposed a complementary comprehensive selection method which combined steady-state and transient-state selection methods,and gave the block diagram of principle of the method.