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mode of power supply
相关语句
  供电方式
    There is not only precedent, but also not design codes for the mode of power supply in China.
    这样的供电方式国内没有先例 ,缺乏设计规范。
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The input Voltage of traction supply system is 220 kV for the electrified railway Haerbin Dalian. The transmission line to traction substation Wanggang uses union method of 220 kV XLPE cable and head line. There is not only precedent, but also not design codes for the mode of power supply in China. In order to choose insulation level of the cable, possible lightning and switching overvoltage are calculated in this paper. Results of calculation indicate that biggest switching overvoltage is 458 kV, and...

The input Voltage of traction supply system is 220 kV for the electrified railway Haerbin Dalian. The transmission line to traction substation Wanggang uses union method of 220 kV XLPE cable and head line. There is not only precedent, but also not design codes for the mode of power supply in China. In order to choose insulation level of the cable, possible lightning and switching overvoltage are calculated in this paper. Results of calculation indicate that biggest switching overvoltage is 458 kV, and biggest lightning overvoltage is 1 349 kV. Referred to national and international related standards and literatures, it is devised that the protecting measures of adopting independent lightning rod, reducing tower's grounding resistance, adding zinc oxide lightning arrester. On the base, the insulation co ordination methods for the cable are put forward.

哈尔滨至大连电气化铁道高压供电系统的额定电压为 2 2 0 k V,王岗牵引变电站进线采用两相 2 2 0 k V交联聚乙烯 (XL PE)电缆与架空线联合供电方式。这样的供电方式国内没有先例 ,缺乏设计规范。为了正确选择XL PE电缆的绝缘水平 ,对过电压进行了仿真计算。计算结果表明 ,最大操作过电压达到 4 5 8k V,最大雷电过电压达到了 1349k V,必须采取有效的保护措施才能选择适当的电缆。参照国内外有关标准和文献 ,设计了采用独立避雷针、减小铁塔接地电阻、增加氧化锌避雷器等综合保护措施的方案 ,在此基础上提出了 XL PE电缆及其附件的绝缘配合意见。

 
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