750 kV同塔双回输电线路下电场效应影响因素分析

Analysis on influencing factors of electric field effect for 750 kV double-circuit transmission lines on the same tower

750 kV同塔双回输电线路下方农田、葡萄田经常发生"电击"现象。通过电场仿真计算、现场实测工频电场强度、工频磁场强度,研究分析750 kV同塔双回输电线路下方地面1.5 m高处电场强度、工频磁场强度的分布及影响因素。电场仿真计算与现场实测电场效应的分布及影响因素基本一致。通过研究输电线路下方电场效应影响因素,为电场效应的抑制措施提供参考。

Electrical shock often occurs in farmland and grape fields below 750 kV double-circuit transmission lines.Through electric field simulation calculation,on-site measured power frequency electric field intensity and power frequency magnetic field strength,the influencing factors of electric field intensity distribution and power frequency magnetic field strength of 1.5 m high ground below 750 kV double-circuit transmission line on the same tower are studied and analyzed.After electric field simulation calculation and field measurement,the distribution of electric field effect and the influencing factors of electric field effect are basically the same.The research provides a reference for the suppression of the electric field effect under the transmission line.