Strategy-making method of overhead line control and undergroundcable retrofitting based on clustering algorithm;

Utilizing computer to protract installation curve of overhead line;

With consideration of the shortage that the tradition discriminant method of overhead lines of rural power grid is complex and hard to programme, a discriminant algorithm of control climate condition of rural power grid based on iterative technology is introduced.

Based on the analysis of a 500 kV overhead ground wire broken and falling down accident,this paper finds the basic cause and proposes the corresponding preventives and treatment.

Working frequency current division factor of overhead ground wire is an important parameter directly related to equipment and personnel safety and project investments.

Manufacture of the overhead conductors for 500 kV transmission line;

The paper analyzed the reason of twisting for overhead conductor and the relations between conductor wave and rigidity, put forward the test method of twisting moment based on the needs of project and investigation of foreign condition, and discussed the R&D of the special equipment for twisting moment test, still put forward the specific me.

The galloping tester developed by Shanghai Eectric Cable Research Institute can imitate well the real galloping tracks of the installed overhead conductors in.

This paper started with the composing and calculation of overhead transmission line the annualized fees, then the wire economical current density formulaJ_∞was derived.