Design and Calculation of the Jumper of Single-pole-combined Strain Tower

The characteristics of self-suspended jumpers,associated jumpers,rigid jumpers and soft jumpers were analyzed.It is pointed out that for the single-pole-combined strain towers used in the 1000kV UHV transmission line,the better selection for the jumper on the non-associated side is the self-suspended rigid jumper;and for the jumper on associated side,the associated-type soft jumper,which has simpler structure and lower cost,are recommended.Due to the load bearing characteristics of the associated soft jumper,the calculation of the associated soft jumper is relatively complex.The inclination of the jumper string and the stress between the jumper and the end of the jumper string are the boundary conditions of jumper calculation.The jumper between the end of the jumper string and the strain clamp can be calculated as a single span.The jumper calculation should look for the minimum stress under the boundary conditions,and the calculated results can be used as numerical foundation for jumper construction.