500 kV compact double circuit transmission line with three-phase wire spacing and clearance of towerhead compact layout

which lead to the charged worker enter the equipotential is more difficult than common line.Based on the existing 500 kV line technology of entering the equipotential

puts forward several feasible solutions forentering the equipotential of 500 kV compact double circuit transmission line

and the combination of the equipoten-tial homework personnel to various schemes gap are calculated

thus climbing ladder method is the optimal solution.With the method of field domain decomposition

three dimensional unbounded field region will be broken down intobounded sequence

the field strength distribution characteristics and change rules of equipotential workers body sur-face is obtained by using Ansoft software to calculate into the field strength at different positions of the body surfacewhen entering the equipotential. Simulation calculation results and the application of Yuxing one loop engineeringshow that: when climbing ladder into equipotential

the screen clothes with a shielding efficiency no less than 60 dB meet safety requirements.