Energy Engineering

Introduction to the Circuit Model - From field theory to circuit theory - Electric charges and electric currents - Electric field and electric voltage Circuit Theory - Validity - Electric bipoles - Agreements on bipoles (user and generator agreement) - Electric power - Fundamental two-poles (resistor, ideal short circuit, ideal open circuit, ideal voltage generator, ideal current generator) - n-poles network - Two port networks Properties of Electric Networks - Kirchhoff's laws - Tellegen's method of conservation of power Networks in Stationary Regime - Real voltage and current generators - Generalized Ohm's law - Equivalent resistance - Triangle-star transformations - Superposition Theorem - Thevenin's theorem - Condition of adaptation - Mesh current method - Nodal potential method - Notes on measurements (ammeter, voltmeter, wattmeter) Dielectric and Capacitor phenomena - Review of the fundamental laws of electrostatics - Dielectric strength - Flat capacitor - Cylindrical capacitor - Bipole condenser - Electrostatic energy - Calculation of the per unit length capacitance of a two-wire power line - Calculation of the per unit length capacitance of an overhead power line - Calculation of partial capacitances in multi-conductor overhead power lines - Charging and discharging of a capacitor - The capacitor in stationary regime Magnetic Phenomena and Inductors - Review of the fundamental laws of magnetostatics - Magnetic behavior of materials - Inductor and self-inductance - Calculation of the inductance of elementary inductors - Calculation of the per unit length inductance of a two-wire line - Coupled inductors and mutual inductance - Charging and discharging of an inductor - The inductor in stationary regime - Magnetic energy - Magnetic circuits Outline of Electricity Networks in Variable Regime Electrical Networks in Periodic Sinusoidal Regime - Symbolic method - Impedance - Fundamental two-port R, L, C, RL series, RC series, RLC series - Instant power - Active power - Reactive power - Apparent power - Complex potency - Conservation of power theorem - Analysis methods of electrical networks (mesh currents and nodal potentials) - Power factor correction of a single-phase load - Behavior of ferromagnetic nuclei in sinusoidal regime: eddy currents - Skin effect in conductors Three-phase networks - Symmetrical and balanced systems - Equivalent single-phase circuit - Star or delta load - Star point potential - Powers - Power factor correction of a three-phase load - Measurement of power in three-phase and four-wire networks - Symmetrical and unbalanced systems Two port networks - The representations of a two-port: transfer equations, impedance matrix and admittance matrix - Connection of two port networks - Determine the auxiliary constants by means of no-load and short-circuit tests - The auxiliary constants of elementary two port networks - Input impedance of a two port network closed on an impedance Electric lines - Overhead and cable power lines - Equivalent electric circuit - Voltage drop - Sizing of the conductors of the distribution lines Elements of Electrical Safety - Effects of current on the human body - Direct and indirect contacts - Protection against indirect contact - Earth systems: earth electrodes, earth resistance, step voltage - Regulations Static electrical energy conversion elements - Semiconductor components (diodes, thyristors, BJT, MOSFET, IGBT) - Classification of static converters (rectifiers, inverters, DC/DC converters) - Operating principle of rectifiers Outline of Electromechanical Conversion

The course requires knowledge of the contents of the teachings of mathematical and physical analysis. Basic knowledge of systems of linear equations, complex numbers, and differential equations is essential.

Books Elettrotecnica - 1 Principi, G. Chitarin, F. Gnesottto, M. Guarnieri, A. Maschio, A. Stella Elettrotecnica, vol. I e II, Marcello D'Amore, Ed. Scientifiche Siderea Handouts are available in the course Google Classroom.

Verification of preparation takes place through an exam which can be taken in the final evaluation period at the end of the semester or in any other available session. The exam consists of a written test and an oral test which must be taken in the same session. Access to the oral exam is conditional on the achievement, following the written exam, of an evaluation higher than 18/30. In the written test it is required to solve numerical problems. Their evaluation is based on the formal development and on the numerical one, with evaluation prevailing on the second one. The final grade is the result of the average of the grades reported in the two tests.

The course is delivered in the first semester of the third year. The class timetable is available on the website of the Faculty of Civil and Industrial Engineering (https://www.ing.uniroma1.it/orari-delle-lezioni)