Measurement of the current flow in an electric power transmission line by detection of infrared radiation therefrom

摘要

Passage of current through a power transmission line causes infrared radiation therefrom. The construction of a high-tension (HT) line with counterwound helical conductors for current around a supporting core minimizes the surrounding magnetic field, reducing the skin resistance of the line per unit length as compared to its bulk resistance per unit length. Infrared radiation from the I.sup.2 R losses in the line is thus linearized, and the current in the line can be indirectly measured by sensing the infrared radiation from the line itself using infrared detectors.