With the global economic development and people's increasing environ- ment awareness, the electromagnetic environmental problem caused by power transmission is paid more and more attention. At the same time, as the voltage rating turn into UHV level, electromagnetic environment has become the critical factor which determines the power tran smission line's structure and the constructing cost. This article on the 500kV line Mahuang electro- magnetic analysis of the environmental impact of computing.
The electromagnetic parameter of power transmission include: power frequencyelectrical field power frequency magnetic field, radio inference (RI) and audible noise (AN). With Canadian SES's CDEGS software, this paper makes detail simulation research on the four electromagnetic parameter of AC EHVand UHV transmission line. This paper introduces theoretical calculation method, main affectedfactor, mitigation technology and their standards for each electromagnetic environment parameter, transmission lines to ensure that the impact of the electromagnetic environment to meet the order require- ments.
Key words：High Voltage transmission lines；power frequency electromagnetic field corona；radio inference (RI)；audible noise (AN)
