Methods and Means of Increasing the Accuracy of Assessment Technological Losses of Electricity in Distribution Overhead Power Lines

The article describes an innovative approach to calculating energy losses in distribution networks. The approach is based on the use of a device proposed by the authors, designed for operation in 6–10 kV networks with an isolated neutral. The device must be installed on all branches of the overhead power line and by measuring the current and temperature of the conductor, calculate the losses in the wire in p.u. By further multiplying the value of losses calculated by the device by the resistance of the line section, you can find the correct losses in the section. It is proposed to refine the method for calculating losses by the device by taking into account various factors: measurement of wire temperature, non-sinusoidal current, elongation of the conductor under the tension force, corrosion of the conductor over time. The calculation method that takes into account these factors is described in the work. Based on the obtained relationships, it is shown that the energy losses can be 1.28 times greater than those expected for a sinusoidal current with an increase in Total Harmonic Current Distortion from 0 to 50% and when the temperature changes from -40 to <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$+70^{\circ}\mathrm{C}$</tex>, the losses can vary from -24 to +17%.