Aiming at the problems of adaptability and economy for conductor type selection of 750 kVair insulated switchgear

analyzes synthetically influence of current carrying capacity

corona

radiointerference

audible noise and conductor on air insulated switchgear

from point of view of savingproject investment

puts forward the conductor type selection scheme which both satisfies electricalperformance and has better economy. The analysis result shows that either altitude 1 000 m below

may select twin bundle conductor

or altitude 1 000 m above

may select quad bundle conductor for750 kV air insulated switchgear.