变电站软导线端部力矩的计算  

Calculation of Torque on Terminals of Flexible Conductors in Substations

作　　者：张谢平 ZHANG Xie-ping(East China Electric Power Design Institute Co.,Ltd.of CPECC,Shanghai 200001,China)

机构地区：[1]中国电力工程顾问集团华东电力设计院有限公司,上海200001

出　　处：《电力勘测设计》2021年第5期25-29,共5页Electric Power Survey & Design

摘　　要：由于变电站电气设备之间的软导线受重力作用,设备端子板上将受到力和力矩的作用。目前的变电站设计中,由于忽视了软导线的抗弯强度,因此只计算设备端子板的受力而不计算力矩。本文考虑软导线抗弯强度后,推导出反映软导线力学状态的四阶微分方程;引入一定近似条件后给出微分方程的解,从而计算出软导线两端的水平力、垂直力以及力矩。最后给出算例,从中可以看出,随着导线重量和抗弯强度的增加,端部力矩不应忽视。In a substation,because of weight of the flexible conductor between electrical equipment,the terminal of the equipment will be subject to forces and torques.At present,due to neglecting the flexure strength of the conductor,electrical designers just calculate the force exerted on the terminal,not considering the torque.In this paper,the flexure strength of the flexible conductor is taken into account,so that a 4-order deferential equation is deduced to reflect the mechanic status of the conductor.Furthermore,under certain approximation,the solution of the deferential equation is given in this paper;consequently,the horizontal force、vertical force and the torque exerted on the terminals can be calculated.At the end of this paper,some examples are presented to verify that with the increase of the weight and flexure strength of the conductor,the torque on the terminal will rise to such an extent that can’t be neglected.

关 键 词：软导线 力矩 抗弯强度 微分方程 端子板 

分 类 号：TM63[电气工程—电力系统及自动化]