INTERACTION OF STRUCTURAL ELEMENTS IN THE OVERHEAD TRANSMISSION POWER LINE DUE TO THE FALLING TOWER

The task of ensuring the survivability of overhead power transmission line structures with accident localization seems relevant in connection with massive emergency damage to overhead lines for various reasons. Emergency situations with the fall of 110 kV overhead line poles and the impact on neighboring intermediate supports by means of wires and lightning protection cables are considered. The previously obtained mathematical model of a single cable-stayed rod system has been improved to solve the problem and allows the calculation of forces in its elements at any position of the falling support with the determination of the coordinates of the attachment points of wires and cables. The dependences of the change in the forces of gravity in wires and cables when they break, when they are pulled, as well as when they are rigidly fixed in supporting clamps are presented. For all the cases under consideration, the gravity forces in the wires and lightning protection cables were determined as effects on neighboring ones. Options for ensuring the survivability of overhead lines with the localization of an accident in one span are presented.