基于层次分析法的进线段差异性综合防雷改造措施

Based on AHP to Evaluate Line Lnlet Difference Comprehensive Lightning Protection Improvement Measures

针对进线段采取差异性综合防雷改造措施:前四级杆塔安装差异性保护间隙、终端塔安装线路避雷器、降低前四级杆塔冲击接地阻抗,解决线路侧与变电站绝缘水平配合存在的问题,降低雷电侵入波峰值、陡度。根据层次分析法的基本原理及矿区电网供电特点,建立层级架构评估模型,通过求解相应判断矩阵、权重向量,对进线段综合防雷改造措施进行综合评估,最后得出进线段差异性综合防雷改造优先顺序:前四级杆塔安装差异性保护间隙、终端塔安装线路避雷器、降低前四级杆塔冲击接地阻抗,并通过ATP-EMTP对上述进线段改造措施的防雷效果进行仿真对比分析。

For line Inlet to take difference comprehensive lightning protection improvement measures： the front four tower installation difference protection gap, terminal Tower line surge arrester installed and reducing the front four towers Impulse grounding impedance. To solve the matching problems of the line side and the substation insulation level, reduce the lightning invasion wave peak and steepness. According to the basic principles of AHP and mine power grid characteristics, establish hierarchical structure evaluation model. By solving the corresponding judgment matrix and weight vector, in order to assess line Inlet difference comprehensive lightning reform measures. Finally come into the line lightning transformation of precedence： the front four tower installation difference protection gap terminal Tower line surge arrester installed and reducing the front four towers Impulse grounding impedance and using the ATP-EMTP to simulate the line Inlet effect of lightning protection improvement measures and comparative analysis.