Time Hardening Model for Large Cross Section Conductor Based on Creep Experiments Analysis Under Different Temperature

The increased cross section of overhead conductors can obviously improve the power transmission capacity. Whereas its large creep elongation may make the design works be more difficult. In this paper, time hardening model was proposed to analyze the creep properties of the large cross section conductor. To perform such analysis, the creep tests of the typical large cross section conductor JL1/G2A-1250/100-84/19 under different temperature conditions were carried out. Then the time hardening models excluding and including temperature coefficient were deduced respectively. The results showed that the calculation based on the time hardening model were well agreed with the results of laboratory tests and field observation. What is more, the accuracy of the time hardening model in this paper is higher than the fitting model. Finally, the section integration model was discussed based on the nonsynchronous stringing process so as to provide a new method for calculating the creep value of large cross section conductors.