架空输电线路无跨越架封网计算方法研究

Study on Calculation Method of Overhead Transmission Line Network Closure without Crossing Frame

为了提高高压电力线路交叉跨越时封网带电跨越施工的安全性,合理设计封网带电跨越施工方案,为架空输电线路不停电跨越施工提供技术支持。根据悬链线模型与力学基本原理,提出了封网情况下承载索的张力、弧垂通用计算方法,能够计算承力索任意一点的张力与弧垂,各种封网型式下的净空距离。通过该计算方法,可以计算封网跨越中的关键参数,为输电线路跨越线路设计提供技术支撑。根据实际工程进行实例验证,所提出的算法是正确并有效的,可为实际应用提供指导。

In order to improve the safety of the construction of the high-voltage power line crossing with electricity,a reasonable construction scheme of live crossing construction is designed to provide technical support for the construction of overhead transmission lines without power failure.According to the catenary model and the basic principle of mechanics,a general calculation method for the tension and sag of the carrying rope with the netword closure is proposed,which can calculate the tension and sag of the carrying rope at any point,and the clearance distance under various types of network closure.Through the calculation method,the key parameters of the transmission line crossing calculated,which can provide technical support for the design of transmission lines acrossing.According to project verification,the proposed algorithm is correct and effective,which can provide guidance for practical application.