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2005-07 Grounding Analysis and Techniques: from Industrial to High Frequencies and Lightning


  Guidelines for the design of grounding systems are usually based on their low frequency resistances. This is essentially because such resistances to ground may be easily measured or estimated analytically. However, recent studies have shown the importance of better understanding of the high frequency behaviour of such groundings. And therefore, the modelling of grounding systems and possibility of their optimization for high frequencies and transients is attracting a great deal of interest among engineers. Such interest stems from a number of actual problems, such as radio base stations in HV towers, lightning protection of wind turbines, power quality, but also from problems of longer-term interest, some of which are: EMC in power plants and substations, transients in complex grounding systems consisting of different conductors such as: cables, pipes, etc., and especially lightning protection of the power and communication systems, buildings and critical installations.
The course is aimed at providing
a) state-of-the art knowledge of the modelling of grounding systems, from industrial frequencies to high frequencies (about 10 MHz);
b) practical indications, simplified models and equations, based on the theory presented in a), and software methods, useful for solving grounding problems;
c) review of grounding techniques for EMC protection of cabling and wiring and lightning protection of buildings;
d) impact of grounding systems on lightning protection of power systems.
The course will comprise, in addition to above, half a day of workshop on computer simulations of grounding systems.


Dr. Fabrizio Pilo (

   Fabrizio Pilo is Associate Professor of Electrical Power Systems at the Department of Electrical and Electronic Engineering (DIEE) of the University of Cagliari since November 2001. He was born in Sassari, Italy, 1966. He graduated in Electrical Engineering at the University of Cagliari in 1992 (magna cum laude), and since then he has been a research collaborator of the Power System Group in the same University. In 1996 he became Assistant Professor at the DIEE. In 1998 he earned the Ph.D. degree from the University of Pisa. He has been responsible for several research contracts in the field of Power Distribution Optimization funded by CESI, ENEL, MIUR, and by the Sardinian Regional Government. He is member of the IEEE and AEIT, and Special Reporter of the CIRED Technical Committee. He is author of more than 60 papers published on international journals or presented in various national and international conferences. Current research interests are in the field of distribution planning and optimization, distributed generation, power quality and AI applications in Power Systems.

Dr. Farhad Rachidi (

   Farhad Rachidi was born in Geneva in 1962. He received the M.S. degree in electri¬cal engineering and the Ph.D. degree from the Swiss Federal Institute of Technol¬ogy, Lausanne, in 1986 and 1991 respectively. He worked at the Power Systems Laboratory of the same institute until 1996. In 1997, he joined the Lightning Re¬search Laboratory of the University of Toronto in Canada and from April 1998 until September 1999, he was with Montena EMC in Switzerland. He is currently ‘Maître d’Enseignement et de Recherche’ and head of the EMC group at the Swiss Federal Institute of Technology, Lausanne, Switzerland. His re¬search interests concern EMC, lightning electromagnetics and electromagnetic field interactions with transmission lines. He is a member of various IEEE, CIGRE and CIRED working groups dealing with lightning electromagnetic effects. He is the convener if the Joint CIGRE-CIRED Working Group on Protection of MV and LV Lines against Lightning, and is member of the scientific committee of various International Conferences in EMC/lightning. Farhad Rachidi is author or co-author of more than 100 scientific papers pub¬lished in reviewed journals and presented at international conferences.


L. Grcev

J. Hoeffelman

E. Montandon

C.A. Nucci

F. Pilo

F. Rachidi

A. Van Deursen

P. Zweiacker


Course duration and location

University of Cagliari, other information are not yet availabe.


Courses Contents

Overview the Grounding Techniques at Industrial Frequencies (J. Hoeffelman)

Characteristics of Lightning Relevant for Analysis of Grounding Systems (F. Rachidi)

Modelling of Grounding Systems for High Frequencies and Transients: Simple Grounding Arrangements (L. Grcev)

Modelling of Grounding Systems for High Frequencies and Transients: Complex Grounding (L. Grcev)

Grounding Techniques for EMC Protection of Cabling and Wiring (A. Van Deursen)

Grounding and Lightning Protection in Power Systems (C.A. Nucci, F. Pilo)

Grounding and Bonding in Buildings for Protection against Lightning Effects (E. Montandon)

Grounding Systems Measurements at High Frequencies (P. Zweiacker)

Computer simulations and workshop (L. Grcev)


Course fees

Registration form