Hexi area is in the Gobi desert with high altitude and heavy sand blown by wind. In this area

the higher AC withstand voltage of 750 kV electrical equipment and larger loss of corona bring a tremendous challenge to the AC withstand voltage test. In view of the special natural environment and the requirement of higher AC withstand voltage

it is necessary to design a special windproof and anti-corona conductor. The authors designed a new windproof and anti-corona conductor following the theories of electric field and mechanics for the AC withstand voltage test. This conductor can greatly increase corona inception voltage and quality factor

reduce the loss of the test circuit. Moreover

it has extremely small wind deviation angle in windy environment

and can keep sufficient insulation distance to surrounding electrical equipment. The conductor was applied to the AC withstand voltage test of the 750 kV project. The result shows that the designed windproof and anti-corona conductor meets the requirement of the field test

and can play an important role in guaranteeing the constructions of the 750 kV project.