Research on the Seismic Resilience Assessment Method of Power Lines
Seismic resilience study helps to assess the functional loss and the recovery time of the transmission lines.It al-so provides a reference for post-earthquake recovery of the power system.Based on the data of the seismic damage to the transmission lines in regions like Chengdu,Mianyang,Deyang,Guangyuan and Aba after the Wenchuan Ms8.0 earthquake in 2008,the functional failure and recovery of the transmission lines are studied.The correlation function between the functional failure and the damage to the transmission lines is built.The correlation function be-tween the recovery time and the damage to the transmission lines is built too.On the basis of the definition of the re-silience,the functional cumulative loss function of the transmission lines was established.Then the seismic resili-ence ranks are put forward.A method to calculating the seismic resilience of the transmission lines is developed,which involves voltage and length of the transmission lines,and topography of the areas which the transmission lines go through.The method proposed in this paper is applied to the calculation of the seismic resilience of the transmission lines in an earthquake-stricken area,and the results are generally consistent with the post-earthquake,field investigation of the seismic damage to the transmission lines.This proves that in mountainous areas the trans-mission lines would suffer less losses when hit by low intensity ground motion,and would suffer more losses when hit by high intensity ground motion.
transmission linesseismic resiliencevulnerabilityfunctional failurerecovery time
NETL
NSTL
万方数据
维普
