Research on equivalent ice thickness monitoring model of overhead transmission lines based on representative span

Abstract This paper aims to enhance the precision and efficiency of the calculation model for the equivalent icing thickness of tangent towers. The current calculation model for equivalent icing thickness of transmission lines lacks consideration of the influence of representative spans and controlled meteorological conditions. It also overlooks the impact of the concentrated load of the tension insulator string on the suspension shape of the conductor, as well as the compensatory capability of the suspension insulator string to counteract stress on the overhead transmission lines when deflected, resulting in calculation deviations. To resolve these issues, this paper investigates the dynamic characteristics of transmission line parameters and proposes a calculation model for equivalent icing thickness based on the representative span. The improved model demonstrates enhanced efficiency and accuracy in measuring the equivalent icing thickness for on-line icing-monitoring of transmission lines. Experimental results confirm a reduction in relative error compared to reference values, with the relative error gradually decreasing as ice thickness increases, indicating enhanced accuracy. The efficacy of this model is substantiated through experiments, offering a more efficient and precise method for monitoring ice thickness in engineering applications.