Selection Method of Load-Bearing Cable Specification of Suspension Crossing Frame

doi:10.3969/j.issn.1008-0198.2025.02.011

Hunan Electric Power ›› 2025, Vol. 45 ›› Issue (2): 82-87.doi: 10.3969/j.issn.1008-0198.2025.02.011

• Power Grid Operation and Control • Previous Articles Next Articles

Selection Method of Load-Bearing Cable Specification of Suspension Crossing Frame

HAN Qiyun¹, WANG Chao¹, HUANG Chaoyong¹, TONG Xin¹, WANG Shuang^2,3, SHEN Yingtong^2,3, TANG Bo^2,3

1. Anhui Power Transmission and Transformation Engineering Co., Ltd., Hefei 230036, China;
2. Electric and New Energy School, China Three Gorges University, Yichang 443002, China;
3. Hubei Transmission Line Engineering Technology Research Center (China Three Gorges University), Yichang 443002, China

Received:2024-11-22 Revised:2024-12-31 Published:2025-04-30

Abstract

Abstract: : In the actual construction process of the suspension crossing frame, the specifications of the load-bearing cables are usually selected directly according to the construction experience, which lacks theoretical basis and is easy to cause waste of resources and insufficient safety. A method of selecting the load-bearing cables for the suspension crossing frame based on MATLAB is proposed. According to the motion state equation of the overhead cables, the mechanical properties of the load-bearing cable under the accident state are calculated, and the mathematical model of the safety analysis of the load-bearing cable is established based on MATLAB. Taking the actual project as an example, the established mathematical model is used to calculate the critical value of the load-bearing cables specification that makes the crossing frame meet the requirements of the safety regulations when different wires fall off the grid, and the influence of span change on the comprehensive safety factor of the load-bearing cables is discussed. The research results show that the critical value of the load-bearing cables specification calculated based on the mathematical model is lower than the traditional empirical value, and the calculation conclusion can provide the basis for the selection of the load-bearing cables specification and the formulation of the spanning construction scheme. As the span increases, the comprehensive safety factor of the load-bearing cables decreases in a power function curve, which can provide a reference for the safety design of the suspension crossing frame.

Key words: suspension crossing frame, load-bearing cable, accident conditions, MATLAB

CLC Number:

TM752.2

HAN Qiyun, WANG Chao, HUANG Chaoyong, TONG Xin, WANG Shuang, SHEN Yingtong, TANG Bo. Selection Method of Load-Bearing Cable Specification of Suspension Crossing Frame[J]. Hunan Electric Power, 2025, 45(2): 82-87.

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Selection Method of Load-Bearing Cable Specification of Suspension Crossing Frame

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