特高压线路并行时的电场分布对环境保护、线路走廊、拆迁范围等有较大影响。研究了500~1 000 kV交流单、双回线路，在不同相序、高度、距离条件下的工频电场强度，得到了1 000 kV特高压交流并行线路的电场分布规律，以现行环保标准为依据，对相序排列提出了建议，指出了对应的线路间距，为交流特高压工程的建设和运行提供了依据。

The electric field distribution of UHV AC parallel lines have great influence on enviormental protection, the corridor width and the demolition range. the power-frequency electric field strength of 500～1 000 kV single-circuit and double-circuit AC lines under various conditions, such as different phase sequence, line heights and distances are studied in this paper, and then the distribution rule of electric field in 1 000 kV UHV AC parallel lines is obtained. Finally, the phase arrangement and the corresponding line space are proposed on the basis of the existing environmental standards, which could provide support for the construction and operation of UHV AC power transmission projects.