Integrated numerical simulation of an electromagnetic transmission line galloping excitation test system

Purpose This paper aims to establish the mathematical model and solve the complex calculation multi-field coupling problem for an electromagnetic overhead transmission line galloping excitation test system. Design/methodology/approach An electromagnetic excitation test system is introduced. To calculate the vibration response of the transmission line, a transient coupled finite element model containing electromagnetic repulsive mechanism and transmission line system was established. Considering the advantages of Newmark-ss algorithm and fourth-order Runge-Kutta algorithm, the two algorithms are combined to solve the model. Compared with the simulation results of existing commercial finite element software, the accuracy of the calculation model of electromagnetic force and wire vibration response are verified. Findings Comparison results show that the proposed calculation model can accurately obtain the force of electromagnetic mechanism and the vibration response of the overhead power lines, and improve the calculation efficiency. The calculation results show that vibration under electromagnetic excitation presents a double half-wave mode, and the galloping amplitude varies according to the charging voltage. Originality/value This paper built the transient simulation model for a galloping test system. The Newmark-ss algorithm and the fourth-order Runge-Kutta algorithm are used to solve the model. The research results are of great significance for the actual galloping test system design.