TY - JOUR
TI - Study on the variation law of layered stresses of overhead conductors in high-altitude cold zone
AU - Han Zhilei
AU - Liu Yongdou
AU - Zhang Hongwei
AU - Duan Jiali
AU - Chen Zhidong
JN - Thermal Science
PY - 2025
VL - 29
IS - 4
SP - 2587
EP - 2599
PT - Article
AB -  A numerical method is proposed for solving the layered stresses of overhead conductors and applied to analyze the stress distribution of the LGJ-400/35 operating in high-altitude cold zone climatic conditions. The method is crucial for achieving a dynamic increase in line current, ensuring strength and sag safety during periods of peak power demand, and preventing strand breakage caused by fatigue under long-term service conditions. Based on the temperature field results, the layered stress of the conductor is determined through internal and external force balance and deformation compatibility. The method fully considers the transversal deformation of the strands caused by interlayer extrusion, Poisson's effect, and temperature changes.