Entity

Time filter

Source Type


Hu W.,Chongqing University | Yan B.,Chongqing University | Cheng H.,Chongqing University | Guo Y.,Southwest Electrical Power Design Institute of Electrical Power Project Consultant Group of China
Yingyong Lixue Xuebao/Chinese Journal of Applied Mechanics | Year: 2012

The tower-line finite element model of a typical 500kV transmission line section is set up by means of ABAQUS software, and the dynamic response of the tower-line system and tower failure in the case of wire breaking are numerically simulated. The failure criterion of equivalent plastic strain is introduced to simulate the failure of the tower, and the element is deleted as its equivalent plastic strain exceeds the allowable level. The result of numerical simulation shows that the maximum stress of the tower in the case of wire breaking is larger than those determined by the design codes of transmission line, so the dynamic impact may be underestimated in the current codes.


Yan B.,Chongqing University | Chen K.,Chongqing University | Xiao H.,Southwest Electrical Power Design Institute of Electrical Power Project Consultant Group of China | Li L.,Southwest Electrical Power Design Institute of Electrical Power Project Consultant Group of China | Yi W.,Southwest Electrical Power Design Institute of Electrical Power Project Consultant Group of China
Yingyong Lixue Xuebao/Chinese Journal of Applied Mechanics | Year: 2013

The tower-line finite element model of a typical 500kV transmission line section is set up by means of ABAQUS software and the dynamic responses of the tower-line system, with different structure parameters, under different ice-shedding conditions are simulated. Based on the numerical results, quantitative relation between the maximum horizontal amplitude of conductor after ice-shedding and the wind swing difference of the two static states of the conductor before and after ice-shedding is obtained. A simplified formula for the horizontal amplitude of the conductor in a multi-span line after ice-shedding is proposed for the determination of the electric insulation clearance distance. The maximum relative error between horizontal swing amplitudes calculated by engineering method and FEM is less than 3%, which satisfies the requirement of engineering design. Results obtained may provide a useful tool for the design of overhead transmission lines in ice zones.


Yan B.,Chongqing University | Lin X.-S.,Chongqing University | Luo W.,Chongqing University | Liu Z.-Q.,Southwest Electrical Power Design Institute of Electrical Power Project Consultant Group of China | Chen Z.-D.,Southwest Electrical Power Design Institute of Electrical Power Project Consultant Group of China
Gongcheng Lixue/Engineering Mechanics | Year: 2010

The historic response analyses of windage yaw of typical transmission line sections are carried out by means of ABAQUS software. These transmission line sections have different spans and different heights over the ground. The statistic values of windage way angle of the suspension insulator string are obtained. It is suggested that the formulation for determining the windage yaw angle of the suspension insulator string in current design code be modified by introducing a dynamic wind load factor. The factor corresponding to different cases are provided based on the results of numerical analyses.


Yan B.,Chongqing University | Chen K.,Chongqing University | Guo Y.,Southwest Electrical Power Design Institute of Electrical Power Project Consultant Group of China | Liang M.,Southwest Electrical Power Design Institute of Electrical Power Project Consultant Group of China | Yuan Q.,Southwest Electrical Power Design Institute of Electrical Power Project Consultant Group of China
IEEE Transactions on Power Delivery | Year: 2013

The numerical modeling method of ice load and ice-shedding load on a transmission line is presented. The dynamic responses of multispan transmission lines with different structural parameters, including span length, number of spans, elevation difference between two suspension ends of the ice-shedding span, length of suspension insulator strings, and number of subconductors in a bundle conductor and conductor type, after ice shedding with different rates are investigated by means of the ABAQUS software. Based on the numerical results, it is discovered that the maximum vertical jump height of a transmission line after ice shedding, which determines the phase-to-phase and phase-to-tower insulation clearances, relates linearly to the sag difference of the conductor in the two static states before and after ice shedding. A simple formula to determine the jump height of a transmission line after ice shedding is suggested for the design of transmission lines in ice zones. © 1986-2012 IEEE.

Discover hidden collaborations