84234 - Environmental Electromagnetic Impact of Electrical Devices and Infrastructures T

Learning outcomes

The course aims to provide knowledge of the methods of calculation and measurement of low-frequency electric and magnetic fields produced by electrical devices and infrastructures in the surrounding environment. Several mathematical models are presented that are descriptive of common and less common cases. Furthermore, various problems will be tackled based on concrete cases. Knowledge of the reference legislation.

Course contents

Introduction to the calculation of electric and magnetic fields

Recalls of electrical engineering: electrical and magnetic quantities and their calculation methods. Electrostatics, and magnetostatics. Quasi-stationary electrodynamics. Examples of calculation of the electric and magnetic field with simple configurations. Choice of appropriate study hypotheses for cases of interest.

Calculation of electric and magnetic fields of power lines

Bifilar air lines in DC and AC straight and catenary. Single and double backhoe three-phase transmission lines. Concept of the optimization of the double backhoe loader. Note on the mechanical calculation of overhead lines to derive characteristic parameters of the lines. Note on the materials used and laying of the overhead lines. Underground cable lines and aerial cable. Configuration of rectilinear and thrust lines. Information on the materials used and laying of the cable lines.

Calculation of the electric and magnetic fields of primary and secondary cabins

Study of the various components of the cabin such as E.M. Electromagnetic model discretization.

Calculation assisted to the computer

Training for the use of calculation codes. Introduction to Matlab. Implementation of some calculation codes. Concrete examples of EM impact assessment.

Instrumentation, monitoring and measurement techniques

Recalls of electrical metrology. Definition and characteristics of an instrument. Introduction to data acquisition systems: A / D conversion of a signal and techniques for digital signal processing. Operating principle of instruments for measuring electric and magnetic fields. The problem of the correct estimation of the maximum emission values of magnetic fields; the weighted peak method: implementation of the method in analog instruments and in digital instruments. Example of the design of an instrument for low-frequency magnetic field measurements. Analysis of the characteristics of some commercial instruments.

Electromagnetic shielding

Shielding of electric and magnetic fields. Principles, methods and techniques of mitigation of electric and magnetic fields at low frequencies

Laws and Norms

Regulatory framework of regional, national and international reference regarding exposure limits to EM fields of workers and population. Regulations and standards for the execution of measurements of low frequency EM fields.

Readings/Bibliography

[1] F. Barozzi, F. Gasparini: “FONDAMENTI DI ELETTROTECNICA-Elettromagnetismo” UTET Torino

[2] A cura di P.Bevitori: “ Inquinamento elettromagnetico” Maggioli Editore Rimini 1989

[3] W. J. Palm III: “Matlab 6 per l’ingegneria e le scienze” Ed. McGraw-Hill 2001

[4] A. Biran, M. Breiner: “Matlab 5 for Engineers” Ed. Addison-Wesley 1999

[5] K. E. Lonngren: “Electromagnetics with Matlab” Ed. Cambridge International Science Publishing, Great Abington, Cambridge, England 1997

[6] M. J. Vygodskij: “Manuale di Matematica Superiore” Ed MIR Mosca, traduzione dal russo 1978

[7] Materiale in linea messo a disposizione dall’ IROE-CNR Firenze

Teaching methods

Frontal lecture and laboratory activities

Assessment methods

Oral exam

Teaching tools

Blackboard, computers, measuring desks

Office hours

See the website of Gaetano Pasini

See the website of Giovanni Mazzanti