METHOD FOR GROUND RESISTANCE MEASUREMENT OF TRANSMISSION TOWER EQUIPPED WITH OVERHEAD GROUNDWIRES

摘要

PURPOSE: A power transmission tower ground resistance measurement method is provided accurately calculate a electric potential drop curve when a ground wire is separated from a power transmission tower by analyzing an electric potential drop curve measurement result and an ground classification coefficient measurement value. CONSTITUTION: A ground current(Iground) is measured at after applying a test current(Itest) to a tower post of a power transmission tower. A ground classification coefficient of the ground current about the test current is calculated. An apparent resistance calculation value is calculated by using the ground classification coefficient, a ground to voltage at a metering point, and voltage of the ground electrode(E). A calculated curve corresponding to the apparent resistance calculation value is calculated. A calibration curve corresponding to the apparent resistance measurement value is calculated.