总结了工频电场、合成电场、工频磁场、直流磁场、可听噪声和无线电干扰的标准，提出了交直流同走廊架设时混合电磁环境的合成和评价方法。以上海地区±800 kV直流线路与不同电压等级多回交流线路同走廊为例，对混合电磁环境进行了分析计算，包括混合电场、混合磁场、可听噪声和无线电干扰。提出了±800 kV直流线路及500 kV、220 kV交流线路间平行接近距离，给出了各条线路导线对地最小高度，确定了集中规划走廊内建筑物及民房的最小拆迁范围。

In this paper the limits in the standards for power frequency electric field, total electric field, power frequency magnetic field, DC magnetic field, audible noise and radio interference are summarized, and a method to calculate and evaluate the superposed electromagnetic environment due to the erection of UHVDC and EHVAC transmission lines in common corridor is proposed. Taking the common corridor in Shanghai region where ±800 kV DC transmission line and multi-loop DC transmission lines of different voltage grade are erected for example, the hybrid electromagnetic environment, including total electric field, total magnetic field, audible noise and radio interference, is calculated and analyzed. The parallel approach distances among ±800 kV DC transmission line, 500 kV AC transmission line and 220 kV AC transmission line are put forward and the minimum clearance to ground of each transmission line is given, besides, the minimum range of buildings and dwelling houses to be dismantled which locate in the planned corridor is determined.

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