International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

The article discusses the free-running sweep split phase (SP) power lines. We derive a nonlinear differential equation of torsional movement split phase by using Lagrange’s equation of the 1st kind. In order to obtain an approximate solution of the nonlinear problem applied the method of Van der Pol. Analyzed degree of influence of parameters of power lines on the frequency of torsional vibrations of SP.

On the basis of long-term statistics data of wires swinging accumulated by energy systems of Kazakhstan the swinging intensity linear regressional dependence has been elucidated as a function of wind speed and its direction to the power line, as well as the length of a span and the number of half-waves in the span. Lower and upper limits of regression equations parameters has been estimated.