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电网技术  2010 

上海地区典型220kV架空线线下场强的研究

, PP. 38-43

Keywords: 架空线,线下场强,同杆双回路,同杆多回路

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Abstract:

针对上海地区条件,基于模拟电荷法对多种220kV架空线下的电场强度进行了计算,包括同塔双回路、220kV四回路、220kV/110kV四回路等不同相序排列情况下的线下场强值,并考虑了邻近存在超高压线路时对线下场强的影响。通过对不同条件架空线下场强的仿真计算,评估了现有220kV架空线对环境的影响,并提出了降低场强可采取的措施。另外,探讨了采用屏蔽线对220kV线路线下工频电场的影响,指出架设屏蔽线能够起到降低线下场强的作用。通过现场实测数据对计算结果进行了验证,计算及实测结果均表明,目前上海地区的220kV架空线线下场强一般不会超过标准限值。

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