Establishing parameters of very high voltage power lines for various loadings and atmospheric conditions

The idea of establishing parameters of electro-power system elements under real conditions of work, and therefore of very high voltage power lines, was suggested at CIGRE congress of 1972. In Romania, I undertook the work on this applied research.In the classical theory of the symmetrical quadrupole of a very high voltage power line, it was considered known its uniform distributed parameters and the magnitudes of its input values and its output values unknown. The problem arising is to determine its internal parameters when the input and output values are known. It was necessary to develop an adequate mathematical method for this purpose, and in the first part of the article I present it in detail.The article presents an adequate way of measurement to reach this purpose, as well as the necessary cautions to do away with the possible errors of measurement, and a synthesis of the results obtained. It also presents one method for testing in laboratory, to double check the correctness of the results of the real high voltage line parameter measurements, because they seem to be abnormal, different from those previously considered as normal.The results of the measured parameters obtained in the laboratory model confirm the results obtained on the real high voltage lines. Finally, I present the theoretically explanation of this results.