Algorithm for the breakage of ice-covered quad bundle conductors based on CR method

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (22) : 318-325.

LU Jiabo1,2， LIU Xiaohui*1， L Zhongbing3， HUANG Zhan1， FAN Li1， WU Haitao4， CHEN Siwei5

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Abstract

In order to analyze the disconnection conditions of ice-covered split wires more quickly and accurately, this paper developed a finite element model of beam and rod elements based on the co-rotational method. A finite element implementation method for disconnection of "node failure" was proposed, and the reliability of the method was verified by comparison with experiments. The finite element program was then written in C++ language, and the program was visualized through QT and VTK toolkits. Finally, a three-level ice-coated four-split finite element model was established. Based on this finite element model, the effects of different ice coating thicknesses and different disconnection positions on the tension of the sub-conductors and the bending moment of the spacer rods were studied. The results show that the spacer rod bears additional torque when the sub-conductor breaks, and the maximum tension value of the unbroken conductor occurs near the spacer rod, and the tension decreases along the conductor away from the break point to the normal operating level. In the case of ice coating, the maximum tension of single sub-conductor and twin sub-conductors increases linearly with the ice coating thickness; when three sub-conductors break, all sub-conductors will break; and when all four sub-conductors break, it can be simplified to single sub-conductor. Calculation of conductors. The simulation results in this paper can provide a reference for transmission line design and fault analysis. The proposed wire breakage simulation method can provide a reliable finite element implementation method for the simulation of wire breakage.

Key words

quad bundle conductors / broken conductor / iced-conductor;

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LU Jiabo1, 2, LIU Xiaohui1, L Zhongbing3, HUANG Zhan1, FAN Li1, WU Haitao4, CHEN Siwei5. Algorithm for the breakage of ice-covered quad bundle conductors based on CR method[J]. Journal of Vibration and Shock, 2024, 43(22): 318-325

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