Research of Technology of Lightning Protection and Lightning Resistance of High-voltage Lines of Mining Area
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摘要: 建立了矿区LD-Ⅱ雷电监测与定位系统用以分析兖矿集团矿区地面落雷密度、雷电流的极性、幅值、落雷时间等雷电参数以及落雷点的位置,研究了矿井高压线路及周边地区雷电分布规律;采用数学方法对该矿区电网3种典型杆塔和线路的雷击进行了模拟计算;在统计分析和数学计算基础上,提出了提高矿区电网防雷耐雷能力的措施,即降低杆塔接地电阻,采取调爬、加装避雷器等措施。实际应用结果表明,上述方法可行。Abstract: The LD-Ⅱ monitoring and positioning system of lightning of mining area was built to analyze thunder density of surface, polarity and amplitude of lightning current, thunder time and position of thunder point in mining area of Yanzhou Mining Group, and distribution of lightning nearby areas of high-voltage lines of mine was researched. A mathematical method was used to make simulation calculation for lightning of three typical towers and lines of the mine grid. Some measures were proposed to improve ability of lightning protection and lightning resistance of the mine grid based on statistical analysis and mathematical calculation, the measures were reducing grounding resistance of towers, using creepage adjustment and adding arrester. The actual application showed that the measures have certain feasibility.
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