Series-impedance of underground transmission systems

• DOI: 10.1109/61.4275
• Publication Date: 2002-08-24T18:46:34Z
• Authors: V. Maló Machado; J.F. Borges da Silva
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology

A general solution for the magnetic field in the soil is developed that satisfies arbitrary boundary conditions on an underground cylindrical surface at a finite depth below an earth/air plane surface. A quasi-steady state hypothesis is assumed. The series impedance of an underground cable with a perfectly conducting sheath is evaluated taking into account skin effect in the soil. The numerical results are compared with F. Pollaczek's (1926) classical solution.