This paper provides the calculation measure of number of overhand insulator in power plant and substation for this calculation is necessary for electrical system design and is a difficult point,at same time,emends the minimum number of overhand insulator in power plant and substation in the standard of conductor and electrical equipment choice after dirtiness degree have been emended.

Study on Computation Methods of Windage of Suspension Insulator Strings under Dynamic Wind Loads;

Test and research result shows that the retrofit of backward V insulators can be carried out for 500 kV suspension insulator string, and when it is .

The electric field distribution on 500kV power transmission tower suspension insulator string and metal fittings is calculated adopting the finite element method (FEM) considering the audible noise on such towers.