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Stable estimation of curves’ equations for sagging of overhead

The estimation’s problem for sagging of the overhead circuit with adherence to the specifications of the measurement’s precision keeping is devoted. The 3D laser scanning technology for the high-precision data obtainment is used. The robust estimation’s methods for processing of the experimental data are used. Two types of sag curves models depending on the geophysical conditions are considered. The testing of the relative positions for overhead circuits to the requirements of «The rules of electrical facilities maintenance» is carried out.