Prediction of Stead-state Electromagnetic Disturbance in UHV Substation

In order to carry out research on the method of UHV stations electromagnetic environment modeling and prediction computation,this paper,based on the method of moment,simulated the steady-state electromagnetic disturbance of all voltage levels in UHV substations by using a software of CDEGS,emphatically analyses the power frequency electric-field and power frequency magnetic-field at the circuitry aisle and the relay cell zone as well as 20 m away from the wall of UHV substations. The simulation results illustrate that:the maximum power frequency electric field at the circuitry aisle of Jindongnan substation,Nanyangare substation and Jingmen substation appear in the tubular generatrix which connect TV and TA,as well as the space below HGIS. The maximum power frequency electric field of this three stations are both beyond the occupational exposure limit 10 kV/m; The results of other power frequency electric field are all lower than the corresponding standards; the maximum power frequency magnetic field at the circuitry aisle and the relay cell zone are all lower than the occupational exposure limit and electrical and electronic equipment immunity standard limit.