Electrostatically Induced Voltages and Currents on Conducting Objects under EHV Transmission Lines

A study is made of the steady-state short circuit current Is.c., and open circuit voltage, Vo.c., to ground for conducting objects under E.H.V. transmission lines. This is carried out in a computer program and on a scaled down laboratory model of a transmission line. In addition, tests are conducted at the American Electric Power Service Corporation and Westinghouse Electric Corporation E.H.V. test site at Apple Grove, West Virginia[1]. The Apple Grove results are used for comparison with the other two approaches. Values of Is.c. within a few percent of the field data and of Vo.c. within about 30 percent are predicted by the computer program. For the transmission line model, the measured values of Is.c. are within a few percent of the Apple Grove measurements and the values of Vo.c. are within approximately 15 percent.